id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
1102.3029 | Analysis of multi-stage open shop processing systems | [
"cs.DS",
"cs.SY",
"math.OC"
] | We study algorithmic problems in multi-stage open shop processing systems that are centered around reachability and deadlock detection questions. We characterize safe and unsafe system states. We show that it is easy to recognize system states that can be reached from the initial state (where the system is empty), but ... | {
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1102.3044 | The Multiplexing Gain of a Two-cell MIMO Channel with Unequal CSI | [
"cs.IT",
"math.IT"
] | In this work, the joint precoding across two distant transmitters (TXs), sharing the knowledge of the data symbols to be transmitted, to two receivers (RXs), each equipped with one antenna, is discussed. We consider a distributed channel state information (CSI) configuration where each TX has its own local estimate of ... | {
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1102.3056 | A Phenomenological Study on Threshold Improvement via Spatial Coupling | [
"cs.IT",
"math.IT"
] | Kudekar et al. proved an interesting result in low-density parity-check (LDPC) convolutional codes: The belief-propagation (BP) threshold is boosted to the maximum-a-posteriori (MAP) threshold by spatial coupling. Furthermore, the authors showed that the BP threshold for code-division multiple-access (CDMA) systems is ... | {
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1102.3061 | Improvement of BP-Based CDMA Multiuser Detection by Spatial Coupling | [
"cs.IT",
"math.IT"
] | Kudekar et al. proved that the belief-propagation (BP) threshold for low-density parity-check codes can be boosted up to the maximum-a-posteriori (MAP) threshold by spatial coupling. In this paper, spatial coupling is applied to randomly-spread code-division multiple-access (CDMA) systems in order to improve the perfor... | {
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1102.3063 | Adiabatic control of the Schr\"odinger equation via conical
intersections of the eigenvalues | [
"math.OC",
"cs.SY"
] | In this paper we present a constructive method to control the bilinear Schr\"odinger equation via two controls. The method is based on adiabatic techniques and works if the spectrum of the Hamiltonian admits eigenvalue intersections, and if the latter are conical (as it happens generically). We provide sharp estimates ... | {
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1102.3067 | Investigating the topology of interacting networks - Theory and
application to coupled climate subnetworks | [
"physics.data-an",
"cs.SI",
"physics.ao-ph",
"physics.soc-ph"
] | Network theory provides various tools for investigating the structural or functional topology of many complex systems found in nature, technology and society. Nevertheless, it has recently been realised that a considerable number of systems of interest should be treated, more appropriately, as interacting networks or n... | {
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1102.3080 | Covering Point Patterns | [
"cs.IT",
"math.IT"
] | An encoder observes a point pattern---a finite number of points in the interval $[0,T]$---which is to be described to a reconstructor using bits. Based on these bits, the reconstructor wishes to select a subset of $[0,T]$ that contains all the points in the pattern. It is shown that, if the point pattern is produced by... | {
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1102.3082 | Hash-and-Forward Relaying for Two-Way Relay Channel | [
"cs.IT",
"math.IT"
] | This paper considers a communication network comprised of two nodes, which have no mutual direct communication links, communicating two-way with the aid of a common relay node (RN), also known as separated two-way relay (TWR) channel. We first recall a cut-set outer bound for the set of rates in the context of this n... | {
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1102.3120 | Interference Two-Way Relay Channel with Three End-nodes | [
"cs.IT",
"math.IT"
] | In this paper, we study a communication system consisting of three end-nodes, e.g. a single transceiver base station (BS), one transmitting and one receiving user equipments (UEs), and a common two-way relay node (RN) wherein the full-duplex BS transmits to the receiving UE in downlink direction and receives from the t... | {
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1102.3126 | Reduced-Complexity Collaborative Decoding of Interleaved Reed-Solomon
and Gabidulin Codes | [
"cs.IT",
"math.IT"
] | An alternative method for collaborative decoding of interleaved Reed-Solomon codes as well as Gabidulin codes for the case of high interleaving degree is proposed. As an example of application, simulation results are presented for a concatenated coding scheme using polar codes as inner codes. | {
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1102.3127 | On the Cognitive Interference Channel with Unidirectional Destination
Cooperation | [
"cs.IT",
"math.IT"
] | The cognitive interference channel with unidirectional destination cooperation (CIFC-UDC) is a cognitive interference channel (CIFC) where the cognitive (secondary) destination not only decodes the information sent from its sending dual but also helps enhance the communication of the primary user. This channel model is... | {
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1102.3129 | Automated Complexity Analysis Based on the Dependency Pair Method | [
"cs.LO",
"cs.AI",
"cs.CC",
"cs.PL"
] | This article is concerned with automated complexity analysis of term rewrite systems. Since these systems underlie much of declarative programming, time complexity of functions defined by rewrite systems is of particular interest. Among other results, we present a variant of the dependency pair method for analysing run... | {
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1102.3132 | Connection between Annealed Free Energy and Belief Propagation on Random
Factor Graph Ensembles | [
"cs.IT",
"math.IT"
] | Recently, Vontobel showed the relationship between Bethe free energy and annealed free energy for protograph factor graph ensembles. In this paper, annealed free energy of any random regular, irregular and Poisson factor graph ensembles are connected to Bethe free energy. The annealed free energy is expressed as the so... | {
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1102.3140 | Capacity Region of $K$-User Discrete Memoryless Interference Channels
with a Mixed Strong-Very Strong Interference | [
"cs.IT",
"math.IT"
] | The capacity region of the 3-user Gaussian Interference Channel (GIC) with mixed strong-very strong interference was established in \cite{ChS}. The mixed strong-very strong interference conditions considered in \cite{ChS} correspond to the case where, at each receiver, one of the interfering signals is strong and the o... | {
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1102.3162 | Network Coding: Is zero error always possible? | [
"cs.IT",
"math.IT"
] | In this work we study zero vs. epsilon-error capacity in network coding instances. For multicast network coding it is well known that all rates that can be delivered with arbitrarily small error probability can also be delivered with zero error probability; that is, the epsilon-error multicast capacity region and zero-... | {
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1102.3165 | An Approximation Algorithm for Computing Shortest Paths in Weighted 3-d
Domains | [
"cs.CG",
"cs.DS",
"cs.GR",
"cs.RO"
] | We present the first polynomial time approximation algorithm for computing shortest paths in weighted three-dimensional domains. Given a polyhedral domain $\D$, consisting of $n$ tetrahedra with positive weights, and a real number $\eps\in(0,1)$, our algorithm constructs paths in $\D$ from a fixed source vertex to all ... | {
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1102.3167 | A Complete Characterization of Irreducible Cyclic Orbit Codes | [
"cs.IT",
"math.IT"
] | We give a complete list of orbit codes that are generated by an irreducible cyclic group, i.e. an irreducible group having one generator. We derive some of the basic properties of these codes such as the cardinality and the minimum distance. | {
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1102.3176 | Selecting the rank of truncated SVD by Maximum Approximation Capacity | [
"cs.IT",
"cs.LG",
"math.IT",
"stat.ML"
] | Truncated Singular Value Decomposition (SVD) calculates the closest rank-$k$ approximation of a given input matrix. Selecting the appropriate rank $k$ defines a critical model order choice in most applications of SVD. To obtain a principled cut-off criterion for the spectrum, we convert the underlying optimization prob... | {
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1102.3181 | Spatially Coupled Quasi-Cyclic Quantum LDPC Codes | [
"cs.IT",
"math.IT",
"quant-ph"
] | We face the following dilemma for designing low-density parity-check codes (LDPC) for quantum error correction. 1) The row weights of parity-check should be large: The minimum distances are bounded above by the minimum row weights of parity-check matrices of constituent classical codes. Small minimum distance tends to ... | {
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1102.3204 | One Packet Suffices - Highly Efficient Packetized Network Coding With
Finite Memory | [
"cs.IT",
"cs.DS",
"math.IT"
] | Random Linear Network Coding (RLNC) has emerged as a powerful tool for robust high-throughput multicast. Projection analysis - a recently introduced technique - shows that the distributed packetized RLNC protocol achieves (order) optimal and perfectly pipelined information dissemination in many settings. In the origina... | {
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1102.3214 | LQG Control Approach to Gaussian Broadcast Channels with Feedback | [
"cs.IT",
"math.IT",
"math.OC"
] | A code for communication over the k-receiver additive white Gaussian noise broadcast channel with feedback is presented and analyzed using tools from the theory of linear quadratic Gaussian optimal control. It is shown that the performance of this code depends on the noise correlation at the receivers and it is related... | {
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1102.3216 | The Two-User Gaussian Fading Broadcast Channel | [
"cs.IT",
"math.IT"
] | This paper presents outerbounds for the two-user Gaussian fading broadcast channel. These outerbounds are based on Costa's entropy power inequality (Costa-EPI) and are formulated mathematically as a feasibility problem. For classes of the two-user Gaussian fading broadcast channel where the outerbound is found to have ... | {
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1102.3220 | A signal recovery algorithm for sparse matrix based compressed sensing | [
"cs.IT",
"cond-mat.dis-nn",
"math.IT"
] | We have developed an approximate signal recovery algorithm with low computational cost for compressed sensing on the basis of randomly constructed sparse measurement matrices. The law of large numbers and the central limit theorem suggest that the developed algorithm saturates the Donoho-Tanner weak threshold for the p... | {
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1102.3225 | Capacity to within 3 bits for a class of Gaussian Interference Channels
with a Cognitive Relay | [
"cs.IT",
"math.IT"
] | The InterFerence Channel with a Cognitive Relay (IFC-CR) consists of a classical two-user interference channel in which the two independent messages are also non-causally known at a cognitive relay node. In this work a special class of IFC-CRs in which the sources do not create interference at the non-intended destinat... | {
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1102.3226 | A New Capacity Result for the Z-Gaussian Cognitive Interference Channel | [
"cs.IT",
"math.IT"
] | This work proposes a novel outer bound for the Gaussian cognitive interference channel in strong interference at the primary receiver based on the capacity of a multi-antenna broadcast channel with degraded message set. It then shows that for the Z-channel, i.e., when the secondary receiver experiences no interference ... | {
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1102.3227 | The Capacity of the Interference Channel with a Cognitive Relay in Very
Strong Interference | [
"cs.IT",
"math.IT"
] | The interference channel with a cognitive relay consists of a classical interference channel with two sourcedestination pairs and with an additional cognitive relay that has a priori knowledge of the sources' messages and aids in the sources' transmission. We derive a new outer bound for this channel using an argument ... | {
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1102.3235 | K-user Interference Channels: General Outer Bound and Sum-capacity for
Certain Gaussian Channels | [
"cs.IT",
"math.IT"
] | This paper derives an outer bound on the capacity region of a general memoryless interference channel with an arbitrary number of users. The derivation follows from a generalization of the techniques developed by Kramer and by Etkin et al for the Gaussian two-user channel. The derived bound is the first known outer bou... | {
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1102.3241 | Some limits to nonparametric estimation for ergodic processes | [
"cs.IT",
"math.IT"
] | A new negative result for nonparametric distribution estimation of binary ergodic processes is shown. The problem of estimation of distribution with any degree of accuracy is studied. Then it is shown that for any countable class of estimators there is a zero-entropy binary ergodic process that is inconsistent with the... | {
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1102.3242 | Weak randomness and Kamae's theorem on normal numbers | [
"cs.IT",
"math.IT"
] | A function from sequences to their subsequences is called selection function. A selection function is called admissible (with respect to normal numbers) if for all normal numbers, their subsequences obtained by the selection function are normal numbers. In Kamae (1973) selection functions that are not depend on seque... | {
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1102.3243 | On the Capacity of Abelian Group Codes Over Discrete Memoryless Channels | [
"cs.IT",
"math.IT"
] | For most discrete memoryless channels, there does not exist a linear code for the channel which uses all of the channel's input symbols. Therefore, linearity of the code for such channels is a very restrictive condition and there should be a loosening of the algebraic structure of the code to a degree that the code can... | {
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1102.3260 | Adaptive Cluster Expansion for Inferring Boltzmann Machines with Noisy
Data | [
"physics.data-an",
"cond-mat.stat-mech",
"cs.LG",
"q-bio.NC",
"q-bio.QM"
] | We introduce a procedure to infer the interactions among a set of binary variables, based on their sampled frequencies and pairwise correlations. The algorithm builds the clusters of variables contributing most to the entropy of the inferred Ising model, and rejects the small contributions due to the sampling noise. Ou... | {
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1102.3268 | Exact observability, square functions and spectral theory | [
"math.FA",
"cs.SY",
"math.OC"
] | In the first part of this article we introduce the notion of a backward-forward conditioning (BFC) system that generalises the notion of zero-class admissibiliy introduced in [Xu,Liu,Yung]. We can show that unless the spectum contains a halfplane, the BFC property occurs only in siutations where the underlying semigrou... | {
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1102.3288 | Compressive MUSIC with optimized partial support for joint sparse
recovery | [
"cs.IT",
"math.IT"
] | Multiple measurement vector (MMV) problem addresses the identification of unknown input vectors that share common sparse support. The MMV problems had been traditionally addressed either by sensor array signal processing or compressive sensing. However, recent breakthrough in this area such as compressive MUSIC (CS-MUS... | {
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1102.3289 | Belief propagation for joint sparse recovery | [
"cs.IT",
"math.IT"
] | Compressed sensing (CS) demonstrates that sparse signals can be recovered from underdetermined linear measurements. We focus on the joint sparse recovery problem where multiple signals share the same common sparse support sets, and they are measured through the same sensing matrix. Leveraging a recent information theor... | {
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1102.3294 | Causal Rate Distortion Function on Abstract Alphabets and Optimal
Reconstruction Kernel | [
"cs.IT",
"math.IT"
] | A Causal rate distortion function with a general fidelity criterion is formulated on abstract alphabets and the optimal reconstruction kernel is derived, which consists of a product of causal kernels. In the process, general abstract spaces are introduced to show existence of the minimizing kernel using weak*-convergen... | {
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1102.3295 | General Linear Quadratic Optimal Stochastic Control Problem Driven by a
Brownian Motion and a Poisson Random Martingale Measure with Random
Coefficients | [
"math.OC",
"cs.SY"
] | The main purpose of this paper is to discuss detailed the stochastic LQ control problem with random coefficients where the linear system is a multidimensional stochastic differential equation driven by a multidimensional Brownian motion and a Poisson random martingale measure. In the paper, we will establish the connec... | {
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1102.3298 | A family of fast-decodable MIDO codes from crossed-product algebras over
Q | [
"cs.IT",
"math.IT",
"math.RA"
] | Multiple Input Double Output (MIDO) asymmetric space-time codes for 4 transmit antennas and 2 receive antennas can be employed in the downlink from base stations to portable devices. Previous MIDO code constructions with low Maximum Likelihood (ML) decoding complexity, full diversity and the non-vanishing determinant (... | {
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1102.3306 | Efficient Error-Correcting Geocoding | [
"cs.IR",
"cs.DS"
] | We study the problem of resolving a perhaps misspelled address of a location into geographic coordinates of latitude and longitude. Our data structure solves this problem within a few milliseconds even for misspelled and fragmentary queries. Compared to major geographic search engines such as Google or Bing we achieve ... | {
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1102.3328 | An Efficient and Integrated Algorithm for Video Enhancement in
Challenging Lighting Conditions | [
"cs.GR",
"cs.CV"
] | We describe a novel integrated algorithm for real-time enhancement of video acquired under challenging lighting conditions. Such conditions include low lighting, haze, and high dynamic range situations. The algorithm automatically detects the dominate source of impairment, then depending on whether it is low lighting, ... | {
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1102.3340 | Multi-skill Collaborative Teams based on Densest Subgraphs | [
"cs.SI",
"cs.DS",
"physics.soc-ph"
] | We consider the problem of identifying a team of skilled individuals for collaboration, in the presence of a social network. Each node in the social network may be an expert in one or more skills. Edge weights specify affinity or collaborative compatibility between respective nodes. Given a project that requires a set ... | {
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1102.3341 | Reasoning about Social Choice Functions | [
"cs.MA"
] | We introduce a logic specifically designed to support reasoning about social choice functions. The logic includes operators to capture strategic ability, and operators to capture agent preferences. We establish a correspondence between formulae in the logic and properties of social choice functions, and show that the l... | {
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1102.3350 | On conjugacy classes of subgroups of the general linear group and cyclic
orbit codes | [
"cs.IT",
"math.IT"
] | Orbit codes are a family of codes employable for communications on a random linear network coding channel. The paper focuses on the classification of these codes. We start by classifying the conjugacy classes of cyclic subgroups of the general linear group. As a result, we are able to focus the study of cyclic orbit co... | {
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1102.3390 | Trellis-Based Check Node Processing for Low-Complexity Nonbinary LP
Decoding | [
"cs.IT",
"math.IT"
] | Linear Programming (LP) decoding is emerging as an attractive alternative to decode Low-Density Parity-Check (LDPC) codes. However, the earliest LP decoders proposed for binary and nonbinary LDPC codes are not suitable for use at moderate and large code lengths. To overcome this problem, Vontobel et al. developed an it... | {
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1102.3392 | Space-Time Coding over Fading Channels with Stable Noise | [
"cs.IT",
"math.IT"
] | This paper addresses the performance of space-time coding over fading channels with impulsive noise which is known to accurately capture network interference. We use the symmetric alpha stable noise distribution and adopt two models which assume dependent and independent noise components across receive antennas. We der... | {
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1102.3396 | Detecting Separation in Robotic and Sensor Networks | [
"cs.RO",
"cs.SY"
] | In this paper we consider the problem of monitoring detecting separation of agents from a base station in robotic and sensor networks. Such separation can be caused by mobility and/or failure of the agents. While separation/cut detection may be performed by passing messages between a node and the base in static network... | {
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1102.3410 | Capacity Bounds for Multiuser Channels with Non-Causal Channel State
Information at the Transmitters | [
"cs.IT",
"math.IT"
] | In this paper, capacity inner and outer bounds are established for the multiuser channels with Channel State Information (CSI) known non-causally at the transmitters: The Multiple Access Channel (MAC), the Broadcast Channel (BC) with common information, and the Relay Channel (RC). For each channel, the actual capacity ... | {
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1102.3413 | The Capacity Region of p-Transmitter/q-Receiver Multiple-Access Channels
with Common Information | [
"cs.IT",
"math.IT"
] | This paper investigates the capacity problem for some multiple-access scenarios with cooperative transmitters. First, a general Multiple-Access Channel (MAC) with common information, i.e., a scenario where p transmitters send private messages and also a common message to q receivers and each receiver decodes all of the... | {
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1102.3493 | Scalable constructions of fractional repetition codes in distributed
storage systems | [
"cs.IT",
"cs.DC",
"math.IT"
] | In distributed storage systems built using commodity hardware, it is necessary to have data redundancy in order to ensure system reliability. In such systems, it is also often desirable to be able to quickly repair storage nodes that fail. We consider a scheme--introduced by El Rouayheb and Ramchandran--which uses comb... | {
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1102.3495 | Diversity and Multiplexing Tradeoff in the Uplink of Cellular Systems
with Linear MMSE Receiver | [
"cs.IT",
"math.IT"
] | In this paper, we extend the diversity and multiplexing tradeoff (DMT) analysis from point-to-point channels to cellular systems to evaluate the impact of inter-cell interference on the system reliability and efficiency. Fundamental tradeoff among diversity order, multiplexing gain and inter-cell interference intensity... | {
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1102.3500 | Improved Rate-Equivocation Regions for Secure Cooperative Communication | [
"cs.IT",
"math.IT"
] | A simple four node network in which cooperation improves the information-theoretic secrecy is studied. The channel consists of two senders, a receiver, and an eavesdropper. One or both senders transmit confidential messages to the receiver, while the eavesdropper tries to decode the transmitted message. The main result... | {
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1102.3508 | Online Learning of Rested and Restless Bandits | [
"math.OC",
"cs.LG"
] | In this paper we study the online learning problem involving rested and restless multiarmed bandits with multiple plays. The system consists of a single player/user and a set of K finite-state discrete-time Markov chains (arms) with unknown state spaces and statistics. At each time step the player can play M arms. The ... | {
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1102.3513 | Layered Index-less Indexed Flash Codes for Improving Average Performance | [
"cs.IT",
"math.IT"
] | In the present paper, a modification of the Index-less Indexed Flash Codes (ILIFC) for flash memory storage system is presented. Although the ILIFC proposed by Mahdavifar et al. has excellent worst case performance, the ILIFC can be further improved in terms of the average case performance. The proposed scheme, referre... | {
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1102.3520 | On Multiple Hypothesis Testing with Rejection Option | [
"cs.IT",
"math.IT"
] | We study the problem of multiple hypothesis testing (HT) in view of a rejection option. That model of HT has many different applications. Errors in testing of M hypotheses regarding the source distribution with an option of rejecting all those hypotheses are considered. The source is discrete and arbitrarily varying (A... | {
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1102.3526 | Linear Error Correcting Codes with Anytime Reliability | [
"cs.IT",
"cs.SY",
"math.IT",
"math.OC"
] | We consider rate R = k/n causal linear codes that map a sequence of k-dimensional binary vectors {b_t} to a sequence of n-dimensional binary vectors {c_t}, such that each c_t is a function of {b_1,b_2,...,b_t}. Such a code is called anytime reliable, for a particular binary-input memoryless channel, if at each time, pr... | {
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1102.3527 | Generation of Innovative and Sparse Encoding Vectors for Broadcast
Systems with Feedback | [
"cs.IT",
"cs.CC",
"math.IT"
] | In the application of linear network coding to wireless broadcasting with feedback, we prove that the problem of determining the existence of an innovative encoding vector is NP-complete when the finite field size is two. When the finite field size is larger than or equal to the number of users, it is shown that we can... | {
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1102.3569 | Optimality of Network Coding in Packet Networks | [
"cs.IT",
"cs.DS",
"math.IT"
] | We resolve the question of optimality for a well-studied packetized implementation of random linear network coding, called PNC. In PNC, in contrast to the classical memoryless setting, nodes store received information in memory to later produce coded packets that reflect this information. PNC is known to achieve order ... | {
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1102.3578 | Onset of Synchronization in Weighted Complex Networks: the Effect of
Weight-Degree Correlation | [
"nlin.CD",
"cs.SI",
"physics.soc-ph"
] | By numerical simulations, we investigate the onset of synchronization of networked phase oscillators under two different weighting schemes. In scheme-I, the link weights are correlated to the product of the degrees of the connected nodes, so this kind of networks is named as the weight-degree correlated (WDC) network. ... | {
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1102.3579 | Cooperative Interference Control for Spectrum Sharing in OFDMA Cellular
Systems | [
"cs.IT",
"math.IT"
] | This paper studies cooperative schemes for the inter-cell interference control in orthogonal-frequency-divisionmultiple- access (OFDMA) cellular systems. The downlink transmission in a simplified two-cell system is examined, where both cells simultaneously access the same frequency band using OFDMA. The joint power and... | {
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1102.3584 | Urban road networks -- Spatial networks with universal geometric
features? A case study on Germany's largest cities | [
"physics.data-an",
"cs.SI",
"physics.soc-ph"
] | Urban road networks have distinct geometric properties that are partially determined by their (quasi-) two-dimensional structure. In this work, we study these properties for 20 of the largest German cities. We find that the small-scale geometry of all examined road networks is extremely similar. The object-size distrib... | {
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1102.3603 | A Graph Theoretical Approach for Network Coding in Wireless Body Area
Networks | [
"cs.IT",
"math.IT"
] | Modern medical wireless systems, such as wireless body area networks (WBANs), are applications of wireless networks that can be used as a tool of data transmission between patients and doctors. Accuracy of data transmission is an important requirement for such systems. In this paper, we will propose a WBAN which is rob... | {
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1102.3604 | Algebraic Decoding of Negacyclic Codes Over Z_4 | [
"math.CO",
"cs.IT",
"math.IT"
] | In this article we investigate Berlekamp's negacyclic codes and discover that these codes, when considered over the integers modulo 4, do not suffer any of the restrictions on the minimum distance observed in Berlekamp's original papers. The codes considered here have minimim Lee distance at least 2t+1, where the gener... | {
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1102.3605 | Nonbinary Quantum Codes from Two-Point Divisors on Hermitian Curves | [
"cs.IT",
"math.IT"
] | Sarvepalli and Klappenecker showed how classical one-point codes on the Hermitian curve can be used to construct quantum codes. Homma and Kim determined the parameters of a larger family of codes, the two-point codes. In quantum error-correction, the observed presence of asymmetry in some quantum channels led to the st... | {
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1102.3617 | Wireless Secrecy in Large-Scale Networks | [
"cs.IT",
"cs.NI",
"math.IT"
] | The ability to exchange secret information is critical to many commercial, governmental, and military networks. The intrinsically secure communications graph (iS-graph) is a random graph which describes the connections that can be securely established over a large-scale network, by exploiting the physical properties of... | {
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1102.3669 | Efficient File Synchronization: a Distributed Source Coding Approach | [
"cs.IT",
"math.IT"
] | The problem of reconstructing a source sequence with the presence of decoder side-information that is mis-synchronized to the source due to deletions is studied in a distributed source coding framework. Motivated by practical applications, the deletion process is assumed to be bursty and is modeled by a Markov chain. T... | {
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1102.3680 | Foundations for Understanding and Building Conscious Systems using
Stable Parallel Looped Dynamics | [
"cs.AI",
"q-bio.NC"
] | The problem of consciousness faced several challenges for a few reasons: (a) a lack of necessary and sufficient conditions, without which we would not know how close we are to the solution, (b) a lack of a synthesis framework to build conscious systems and (c) a lack of mechanisms explaining the transition between the ... | {
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1102.3713 | Optimal Control of Inhomogeneous Ensembles | [
"math.OC",
"cs.SY",
"quant-ph"
] | Inhomogeneity, in its many forms, appears frequently in practical physical systems. Readily apparent in quantum systems, inhomogeneity is caused by hardware imperfections, measurement inaccuracies, and environmental variations, and subsequently limits the performance and efficiency achievable in current experiments. In... | {
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1102.3751 | Utility-Privacy Tradeoff in Databases: An Information-theoretic Approach | [
"cs.IT",
"math.IT"
] | Ensuring the usefulness of electronic data sources while providing necessary privacy guarantees is an important unsolved problem. This problem drives the need for an analytical framework that can quantify the safety of personally identifiable information (privacy) while still providing a quantifable benefit (utility) t... | {
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1102.3755 | Cooperative Wideband Spectrum Sensing for the Centralized Cognitive
Radio Network | [
"cs.IT",
"math.IT"
] | Various primary user (PU) radios have been allocated into fixed frequency bands in the whole spectrum. A cognitive radio network (CRN) should be able to perform the wideband spectrum sensing (WSS) to detect temporarily unoccupied frequency bands. We summarize four occupancy features for the frequency bands. 1. The occu... | {
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1102.3758 | Optimal Spectrum Management in Multiuser Interference Channels | [
"cs.IT",
"math.IT"
] | In this paper, we study the non-convex problem of continuous frequency optimal spectrum management in multiuser frequency selective interference channels. Firstly, a simple pairwise channel condition for FDMA schemes to achieve all Pareto optimal points of the rate region is derived. It enables fully distributed global... | {
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1102.3763 | On the Capacity Region of the Cognitive Interference Channel with
Unidirectional Destination Cooperation | [
"cs.IT",
"math.IT"
] | The cognitive interference channel with unidirectional destination cooperation (CIFC-UDC) is a variant of the cognitive interference channel (CIFC) where the cognitive (secondary) destination not only decodes the information sent from its sending dual but also helps enhance the communication of the primary user. This c... | {
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1102.3828 | Searching in one billion vectors: re-rank with source coding | [
"cs.IR",
"cs.CV"
] | Recent indexing techniques inspired by source coding have been shown successful to index billions of high-dimensional vectors in memory. In this paper, we propose an approach that re-ranks the neighbor hypotheses obtained by these compressed-domain indexing methods. In contrast to the usual post-verification scheme, wh... | {
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1102.3830 | A linear framework for region-based image segmentation and inpainting
involving curvature penalization | [
"cs.CV",
"cs.AI",
"math.OC"
] | We present the first method to handle curvature regularity in region-based image segmentation and inpainting that is independent of initialization. To this end we start from a new formulation of length-based optimization schemes, based on surface continuation constraints, and discuss the connections to existing schem... | {
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1102.3833 | Aligned Interference Neutralization and the Degrees of Freedom of the 2
User Interference Channel with Instantaneous Relay | [
"cs.IT",
"math.IT"
] | It is well known that the classical 2 user Gaussian interference channel has only 1 degree of freedom (DoF), which can be achieved by orthogonal time division among the 2 users. It is also known that the use of conventional relays, which introduce a processing delay of at least one symbol duration relative to the direc... | {
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1102.3852 | On the Gain of Joint Processing of Pilot and Data Symbols in Stationary
Rayleigh Fading Channels | [
"cs.IT",
"math.IT"
] | In many typical mobile communication receivers the channel is estimated based on pilot symbols to allow for a coherent detection and decoding in a separate processing step. Currently much work is spent on receivers which break up this separation, e.g., by enhancing channel estimation based on reliability information on... | {
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1102.3865 | Probability Based Clustering for Document and User Properties | [
"cs.HC",
"cs.IR"
] | Information Retrieval systems can be improved by exploiting context information such as user and document features. This article presents a model based on overlapping probabilistic or fuzzy clusters for such features. The model is applied within a fusion method which linearly combines several retrieval systems. The fus... | {
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1102.3866 | Treatment of Semantic Heterogeneity in Information Retrieval | [
"cs.IR"
] | The first step to handle semantic heterogeneity should be the attempt to enrich the semantic information about documents, i.e. to fill up the gaps in the documents meta-data automatically. Section 2 describes a set of cascading deductive and heuristic extraction rules, which were developed in the project CARMEN for the... | {
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1102.3867 | Controllability properties for the one-dimensional Heat equation under
multiplicative or nonnegative additive controls with local mobile support | [
"math.OC",
"cs.SY"
] | We discuss several new results on nonnegative approximate controllability for the one-dimensional Heat equation governed by either multiplicative or nonnegative additive control, acting within a proper subset of the space domain at every moment of time. Our methods allow us to link these two types of controls to some e... | {
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1102.3868 | Evolved preambles for MAX-SAT heuristics | [
"cs.AI",
"cs.NE"
] | MAX-SAT heuristics normally operate from random initial truth assignments to the variables. We consider the use of what we call preambles, which are sequences of variables with corresponding single-variable assignment actions intended to be used to determine a more suitable initial truth assignment for a given problem ... | {
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1102.3887 | Active Clustering: Robust and Efficient Hierarchical Clustering using
Adaptively Selected Similarities | [
"cs.IT",
"cs.LG",
"math.IT",
"stat.ML"
] | Hierarchical clustering based on pairwise similarities is a common tool used in a broad range of scientific applications. However, in many problems it may be expensive to obtain or compute similarities between the items to be clustered. This paper investigates the hierarchical clustering of N items based on a small sub... | {
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1102.3902 | Polytope of Correct (Linear Programming) Decoding and Low-Weight
Pseudo-Codewords | [
"cs.IT",
"math.IT"
] | We analyze Linear Programming (LP) decoding of graphical binary codes operating over soft-output, symmetric and log-concave channels. We show that the error-surface, separating domain of the correct decoding from domain of the erroneous decoding, is a polytope. We formulate the problem of finding the lowest-weight pseu... | {
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1102.3919 | Inferring Disease and Gene Set Associations with Rank Coherence in
Networks | [
"q-bio.GN",
"cs.AI",
"cs.LG",
"q-bio.MN"
] | A computational challenge to validate the candidate disease genes identified in a high-throughput genomic study is to elucidate the associations between the set of candidate genes and disease phenotypes. The conventional gene set enrichment analysis often fails to reveal associations between disease phenotypes and the ... | {
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1102.3923 | Concentration-Based Guarantees for Low-Rank Matrix Reconstruction | [
"cs.LG",
"stat.ML"
] | We consider the problem of approximately reconstructing a partially-observed, approximately low-rank matrix. This problem has received much attention lately, mostly using the trace-norm as a surrogate to the rank. Here we study low-rank matrix reconstruction using both the trace-norm, as well as the less-studied max-no... | {
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1102.3931 | Social consensus through the influence of committed minorities | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | We show how the prevailing majority opinion in a population can be rapidly reversed by a small fraction p of randomly distributed committed agents who consistently proselytize the opposing opinion and are immune to influence. Specifically, we show that when the committed fraction grows beyond a critical value p_c \appr... | {
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1102.3936 | AWGN Channel Analysis of Terminated LDPC Convolutional Codes | [
"cs.IT",
"math.IT"
] | It has previously been shown that ensembles of terminated protograph-based low-density parity-check (LDPC) convolutional codes have a typical minimum distance that grows linearly with block length and that they are capable of achieving capacity approaching iterative decoding thresholds on the binary erasure channel (BE... | {
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1102.3937 | Axiomatic Ranking of Network Role Similarity | [
"cs.SI",
"physics.soc-ph"
] | A key task in social network and other complex network analysis is role analysis: describing and categorizing nodes according to how they interact with other nodes. Two nodes have the same role if they interact with equivalent sets of neighbors. The most fundamental role equivalence is automorphic equivalence. Unfortun... | {
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1102.3939 | A Sub-Space Method to Detect Multiple Wireless Microphone Signals in TV
Band White Space | [
"cs.IT",
"math.IT",
"stat.AP"
] | The main hurdle in the realization of dynamic spectrum access (DSA) systems from physical layer perspective is the reliable sensing of low power licensed users. One such scenario shows up in the unlicensed use of TV bands where the TV Band Devices (TVBDs) are required to sense extremely low power wireless microphones (... | {
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1102.3944 | Fixed-length lossy compression in the finite blocklength regime | [
"cs.IT",
"math.IT"
] | This paper studies the minimum achievable source coding rate as a function of blocklength $n$ and probability $\epsilon$ that the distortion exceeds a given level $d$. Tight general achievability and converse bounds are derived that hold at arbitrary fixed blocklength. For stationary memoryless sources with separable d... | {
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1102.3947 | Subspace Expanders and Matrix Rank Minimization | [
"cs.IT",
"math.IT"
] | Matrix rank minimization (RM) problems recently gained extensive attention due to numerous applications in machine learning, system identification and graphical models. In RM problem, one aims to find the matrix with the lowest rank that satisfies a set of linear constraints. The existing algorithms include nuclear nor... | {
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1102.3949 | Sparse Signal Recovery with Temporally Correlated Source Vectors Using
Sparse Bayesian Learning | [
"stat.ML",
"cs.LG"
] | We address the sparse signal recovery problem in the context of multiple measurement vectors (MMV) when elements in each nonzero row of the solution matrix are temporally correlated. Existing algorithms do not consider such temporal correlations and thus their performance degrades significantly with the correlations. I... | {
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1102.3989 | Self-organization in social tagging systems | [
"physics.soc-ph",
"cs.SI"
] | Individuals often imitate each other to fall into the typical group, leading to a self-organized state of typical behaviors in a community. In this paper, we model self-organization in social tagging systems and illustrate the underlying interaction and dynamics. Specifically, we introduce a model in which individuals ... | {
"Other": 0,
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} |
1102.4021 | Privacy Preserving Spam Filtering | [
"cs.LG",
"cs.CR"
] | Email is a private medium of communication, and the inherent privacy constraints form a major obstacle in developing effective spam filtering methods which require access to a large amount of email data belonging to multiple users. To mitigate this problem, we envision a privacy preserving spam filtering system, where ... | {
"Other": 0,
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} |
1102.4085 | On the Benefits of Partial Channel State Information for Repetition
Protocols in Block Fading Channels | [
"cs.IT",
"math.IT"
] | This paper studies the throughput performance of HARQ (hybrid automatic repeat request) protocols over block fading Gaussian channels. It proposes new protocols that use the available feedback bit(s) not only to request a retransmission, but also to inform the transmitter about the instantaneous channel quality. An exp... | {
"Other": 0,
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} |
1102.4086 | Schroedinger Eigenmaps for the Analysis of Bio-Medical Data | [
"cs.CE",
"physics.data-an",
"physics.med-ph",
"q-bio.QM"
] | We introduce Schroedinger Eigenmaps, a new semi-supervised manifold learning and recovery technique. This method is based on an implementation of graph Schroedinger operators with appropriately constructed barrier potentials as carriers of labeled information. We use our approach for the analysis of standard bio-medica... | {
"Other": 0,
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"cs.SD": 0,
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} |
1102.4099 | Capacity Achieving Linear Codes with Random Binary Sparse Generating
Matrices | [
"cs.IT",
"math.IT"
] | In this paper, we prove the existence of capacity achieving linear codes with random binary sparse generating matrices. The results on the existence of capacity achieving linear codes in the literature are limited to the random binary codes with equal probability generating matrix elements and sparse parity-check matri... | {
"Other": 0,
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"cs.SD": 0,
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} |
1102.4104 | Characterizing Discriminative Patterns | [
"cs.DB",
"cs.IT",
"math.IT",
"q-bio.GN"
] | Discriminative patterns are association patterns that occur with disproportionate frequency in some classes versus others, and have been studied under names such as emerging patterns and contrast sets. Such patterns have demonstrated considerable value for classification and subgroup discovery, but a detailed understan... | {
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} |
1102.4126 | Multiuser Cognitive Radio Networks: An Information Theoretic Perspective | [
"cs.IT",
"math.IT"
] | Achievable rate regions and outer bounds are derived for three-user interference channels where the transmitters cooperate in a unidirectional manner via a noncausal message-sharing mechanism. The three-user channel facilitates different ways of message-sharing between the primary and secondary (or cognitive) transmitt... | {
"Other": 0,
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} |
1102.4132 | Optimal dividend control for a generalized risk model with investment
incomes and debit interest | [
"math.OC",
"cs.SY",
"q-fin.RM"
] | This paper investigates dividend optimization of an insurance corporation under a more realistic model which takes into consideration refinancing or capital injections. The model follows the compound Poisson framework with credit interest for positive reserve, and debit interest for negative reserve. Ruin occurs when t... | {
"Other": 0,
"cs.AI": 0,
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"cs.RO": 0,
"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 1
} |
1102.4135 | Location Cheating: A Security Challenge to Location-based Social Network
Services | [
"cs.SI",
"cs.CR"
] | Location-based mobile social network services such as foursquare and Gowalla have grown exponentially over the past several years. These location-based services utilize the geographical position to enrich user experiences in a variety of contexts, including location-based searching and location-based mobile advertising... | {
"Other": 0,
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"cs.SY": 0
} |
1102.4137 | Using Distributed Rotations for a Low-Complexity Dynamic
Decode-and-Forward Relay Protocol | [
"cs.IT",
"math.IT"
] | In this paper, we propose to implement the dynamic decode-and-forward (DDF) protocol with distributed rotations. In addition to being the first minimum-delay implementation of the DDF protocol proposed for any number of relays, this technique allows to exploit cooperative diversity without inducing the high decoding co... | {
"Other": 0,
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} |
1102.4180 | Characterizing and approximating eigenvalue sets of symmetric interval
matrices | [
"cs.RO"
] | We consider the eigenvalue problem for the case where the input matrix is symmetric and its entries perturb in some given intervals. We present a characterization of some of the exact boundary points, which allows us to introduce an inner approximation algorithm, that in many case estimates exact bounds. To our knowled... | {
"Other": 0,
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} |
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