hash stringlengths 32 32 | doc_id stringlengths 5 12 | section stringlengths 5 1.47k | content stringlengths 0 6.67M |
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1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.5.2.1 Introduction | (void) |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.5.2.2 Requirements | (void) |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6 Measurements Performance Requirements | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1 Measurements Performance for UE | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1 Performance for UE Measurements in Downlink (RX) | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.1 P-CCPCH RSCP (1.28 Mcps TDD) | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.1.1 Explanation | The result of this measurement is not energy and it is independent with the bandwidth, so there should not be modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.2 CPICH Measurements (FDD) | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.3 Timeslot ISCP | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.3.1 Explanation | The result of this measurement is not energy and it is independent with the bandwidth, so there should not be modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.4 UTRA carrier RSSI | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.4.1 Explanation | This measurement relies on the signal-detecting algorithm which independent with the bandwidth and chip rate, so it needs no modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.5 GSM carrier RSSI | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.5.1 Explanation | This measurement relies on GSM, so it needs no modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.6 SIR | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.6.1 Explanation | This measurement mainly used to meet the requirement of service performance which independent with the bandwidth and chip rate, so there should be no modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.7 Transport channel BLER | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.7.1 Explanation | This measurement is mainly used to meet the requirement of service performance which independent with the bandwidth and chip rate, so there should be no modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.8 SFN-SFN observed time difference | The measurement period for CELL_DCH state can be found in section 4.5. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.8.1 Accuracy requirements | Table 4.9: SFN-SFN observed time difference accuracy
Parameter
Unit
Accuracy
Conditions
Io [dBm]
SFN-SFN observed time difference
Chip
+/-0,5 for type 1 but +/- 0.125 for type 2
-94...-50 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.8.2 Range/mapping | The reporting range for SFN-SFN observed time difference type 1 is from 0 ... 3276800 chip.
In table 4.10 mapping of the measured quantity is defined. Signalling range may be larger than the guaranteed accuracy range.
Table 4.10
Reported value
Measured quantity value
Unit
T1_SFN-SFN_TIME _0000000
0 SFN-SFN observed t... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.8.3 Explanation difference | In 1.28 Mcps TDD there are 12800chips per frame while in 3.84 Mcps TDD there are 38400chips. According to this chip number difference, the observed time difference range in type 1 should be changed correspondingly.
There are 3 kind of special time slot (DwPTS, UpPTS and GP) in 1.28 Mcps TDD frame structure (see section... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.9 Observed time difference to GSM cell | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.9.1 Explanation | For different systems, the measurement that is used to realize the compatibility should be the same. So it is independent with bandwidth and chip rate and there should be no modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.10 UE GPS Timing of Cell Frames for LCS | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.10.1 Explanation | The GPS timing of cell frames should be the same for different systems having LCS, so it needs no modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.11 SFN-CFN observed time difference | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.1.11.1 Explanation | For the measurement used for the interwork between cells, which belong to the same system or different systems, should be the same and independent with bandwidth and chip rate. So it needs no modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.2 Performance for UE Measurements in Uplink (TX) | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.2.1 UE transmitted power | Common with 3.84 Mcps TDD. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.1.2.1.1 Explanation | The UE transmitted power is represented by energy density and it is independent with the bandwidth, so there should not be modification. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2 Measurements Performance for UTRAN | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1 Performance for UTRAN Measurements in Uplink (RX) | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.1 RSCP | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.2 Timeslot ISCP | Common with 3.84 Mcps TDD option |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.3 RSSI | Common with 3.84 Mcps TDD option |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.4 SIR | Common with 3.84 Mcps TDD option |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.5 Transport Channel BER | Common with 3.84 Mcps TDD option |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.6 RX Timing Deviation | The definition of RX Timing Deviation here is common with 3.84 Mcps but only accuracy and range are different between two TDD mode. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.6.1 Accuracy requirements | Table 4.12
Parameter
Unit
Accuracy
Conditions
Range [chips]
RX Timing Deviation
chips period
+/- 0.125
-128, …, 128 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.6.2 Range/mapping | The reporting range for RX Timing Deviation is from-128 ... 128 chips.
In table 4.13 mapping of the measured quantity is defined. Signaling range may be larger than the guaranteed accuracy range.
Table 4.13
Reported value
Measured quantity value
Unit
RX_TIME_DEV_0001
RX Timing Deviation < –128,000
chip
RX_TIME_DEV_0002... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.6.3 Explanation difference | In 3.84 Mcps TDD the ‘RX Timing Deviation’ measurement is only needed to report to the higher layer for timing advance calculation or location services. It does not need to measure this value continuously.
While in 1.28 Mcps TDD this measurement is not only reported to higher layer, but also severed as a physical signa... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.7 SYNC-UL Timing Deviation for 1.28 Mcps | This measurement refers to TS 25.225 [13]subsection 5.2.8.1. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.7.1 Accuracy requirements | Table 4.14
Parameter
Unit
Accuracy
Conditions
Range [chips]
SYNC-UL Timing Deviation
chips period
+/- 0.125
0, …, 255.875 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.7.2 Range/mapping | The reporting range for SYNC-UL Timing Deviation is from 0 ... 255.875 chips.
In table 4.15 the mapping of the measured quantity is defined. Signaling range may be larger than the guaranteed accuracy range.
Table 4.15
Reported value
Measured quantity value
Unit
SYNC_UL_TIME_DEV_0000
SYNC-UL Timing Deviation < 0
chip
SY... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.1.7.3 Explanation difference | In 1.28 Mcps TDD there is a two step approach for the random access procedure. In the first step the UpPCH is transmitted by the UE. The node B received the UpPCH and responds with the FPACH which contains the received position of the SYNC-UL sequence. This allows the UE to adjust its timing advance for the PRACH in or... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.2 Performance for UTRAN Measurements in Downlink (TX) | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.2.1 Transmitted carrier power | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.2.1.1 Explanation | These parameters in this section are not energy ,so they are independent with bandwidth . There need not to any change compare with the 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.6.2.2.2 Transmitted code power | Common with 3.84 Mcps TDD option.
4.6.2.2.2.1 explanation
These parameters in this section are not energy ,so they are independent with bandwidth. There need not to any change compare with the 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7 FPACH physical layer information field definition (1.28 Mcps TDD) | 1.28 Mcps TDD introduces the FPACH (Forward Physical Access CHannel) which carries physical layer information. Two of these information fields are the ‘received starting position of the UpPCH’ (Uplink Pilot CHannel) and the ‘transmit power level command for the RACH message’. Both information fields are directly (recei... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7.0 Explanation difference | In 1.28 Mcps TDD the random access procedure follows a two step approach. After the 1st step (UpPCH) the FPACH also carries the information fields related to the initialisation of uplink synchronisation control and uplink power control for the PRACH (2nd step). This is ensuring that the PRACH can be transmitted in the ... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7.1 Received starting position of the UpPCH (UpPCHPOS) (1.28 Mcps TDD) | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7.1.1 Range/mapping | Table 4.16
Range/mapping
UpPCHPOS FIELD is given with a resolution of 1/8 chip with the range [0,255.875] chip.
UpPCHPOS FIELD shall be transmitted in the FPACH where:
UpPCHPOS FIELD_LEV_0000: UpPCHPOS < 0 chip
UpPCHPOS FIELD_LEV_0001: 0 chip UpPCHPOS < 0.125 chip
UpPCHPOS FIELD_LEV_0002: 0.125 chip ... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7.1.2 Accuracy requirements | Table 4.17
Parameter
Unit
Accuracy
Conditions
Range [chips]
Received starting position of the UpPCH
chips period
+/- 0.125
0, …, 255.875 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7.2 Transmit Power Level Command for the RACH message (1.28 Mcps TDD) | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7.2.1 Range/mapping | Table 4.18
Range/mapping
PRXPRACH,des FIELD is given with a resolution of 0.5 dB with the range [-120,-80] dBm.
PRXPRACH,des FIELD shall be transmitted in the FPACH where:
PRXPRACH,des FIELD_LEV_00: PRXPRACH,des < -120 dBm
PRXPRACH,des FIELD_LEV_01: -120 dBm PRXPRACH,des < -119.5 dBm
PRXPRACH,des FIELD_LEV_02... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 4.7.2.2 Accuracy requirements | Since this is a desired RX power at the node B and this is no measured value and the derivation of this value in the node B is implementation specific, accuracy requirements are not applicable. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5 UE Radio Transmission and Reception | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1 Frequency bands and channel arrangement | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.1 General | The information presented in this section is based on a chip rate of 1.28 Mcps. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.2 Frequency bands | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.3 TX–RX frequency separation | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.3.1 Description | No TX-RX frequency separation is required as Time Division Duplex (TDD) is employed. Each subframe of 1.28 Mcps TDD consists of 7 main timeslots (TS0 ~ TS6) where TS0 (before DL to UL switching point) are always allocated DL, the timeslots (at least the first one) before the switching point (vice versa) are allocated U... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.3.2 Explanation of difference | The frame structure for 3.84 Mcps TDD and 1.28 Mcps TDD is different. For 3.84 Mcps TDD, each TDMA frame consists of 15 timeslots where each timeslot can be allocated to either transmit or receive. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.4 Channel arrangement | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.4.1 Channel spacing | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.4.1.1 Background | The chip rate is 1.28 Mcps with a roll-off factor of 0.22, therefore the occupied bandwidth is1.6MHz. It is just nominal 1.6MHz, and it is also flexible to adjust the channel raster step 200kHz to narrow as 1.4MHz for strict requirement situations if needed. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.4.1.2 Channel spacing | The channel spacing for 1.28 Mcps chip rate option is 1.6MHz. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.4.2 Channel raster | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.1.4.3 Channel number | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2 Transmitter characteristics | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.1 General | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.2 Transmit power | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.2.1 User Equipment maximum output power | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.3 UE frequency stability | Common with 3.84 Mcps TDD option. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4 Output power dynamics | Power control is used to limit the interference level. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.1 Open loop power control | Open loop power control is the ability of the UE transmitter to sets its output power to a specific value. The open loop power control tolerance is given in Table 5.1 |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.1.1 Minimum requirement | The UE open loop power is defined as the average power in a timeslot or ON power duration, whichever is available, and they are measured with a filter that has a Root-Raised Cosine (RRC) filter response with a roll off and a bandwidth equal to the chip rate.
Table 5.1: Open loop power control
Normal conditions... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.2 Closed loop power control in the uplink | Closed loop power control in the Uplink is the ability of the UE transmitter to adjust its output power in accordance with one or more TPC commands received in the downlink. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.2.1 Power control steps | The power control step is the change in the UE transmitter output power in response to a single TPC command, TPC_cmd, arrived at the UE. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.2.1.1 Minimum requirement | The UE transmitter shall have the capability of changing the output power with a step size of 1, 2 and 3 dB according to the value of TPC or RP-TPC, in the slot immediately after the TPC_cmd can be arrived.
a) The transmitter output power step due to closed loop power control shall be within the range shown in Table ... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.3 Minimum transmit output power | The minimum controlled output power of the UE is when the power control setting is set to a minimum value. This is when both the closed loop and open loop power control indicate a minimum transmit output power is required. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.3.1 Minimum requirement | The minimum transmit power is defined as an averaged power in a time slot measured with a filter that has a Root-Raised Cosine (RRC) filter response with a roll off and a bandwidth equal to the chip rate. The minimum transmit power shall be better than –49 dBm/1.28MHz. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.3.2 Rationale | For the power control issue, the open loop and closed loop power control procedure is introduced in 1.28 Mcps TDD option [4], basically has the similar requirements as that of UTRA FDD.
The minimum transmit output power is basically kept in line with 3.84 Mcps TDD mode, just considering the RRC measurement filter bandw... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.4 Out-of-synchronisation handling of output power | The UE shall monitor the DPCH quality in order to detect a loss of the signal on Layer 1. The thresholds Qout and Qin specify at what DPCH quality levels the UE shall shut its power off and when it may turn its transmitter on, respectively. The thresholds are not defined explicitly, but are defined by the conditions un... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.4.1 Requirement | The parameters in Table 5.4 are defined using the DL reference measurement channel (12.2) kbps specified in Annex C.2.1, where the CRC bits are replaced by data bits, and with static propagation conditions.
Table 5.4: DCH parameters for test of Out-of-synch handling
Parameter
Unit
Value
dB
-1
dBm/1.28 MHz
-60
dB
See fi... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.4.4.2 Rationale | A test procedure was introduced for the case of testing the UE ability to shut down its power if the received power is bellow a certain limit. The power will be varied at the input of the 3.84 Mcps TDD Option UE according to the following figure:
Figure 5.2: Conditions for out-of-synch handling in the 3.84 Mcps TDD Opt... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5 Transmit ON/OFF power | |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.1 Transmit OFF power | The transmit OFF power state is when the UE does not transmit. This parameter is defined as the maximum output transmit power within the channel bandwidth when the transmitter is OFF. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.1.1 Minimum Requirement | The requirement for transmit OFF power shall be better than 65dBm measured with a filter that has a Root-Raised Cosine (RRC) filter response with a roll off =0.22 and a bandwidth equal to the chip rate. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.1.2 Rational | In TDD mode, various users are transmitting and receiving on the same frequency band. A maximum transmit output power in the transmitter idle mode has to be defined not to affect other nearby receiving mobiles or BSs. Then received power due to a near by UE has to be required below the noise floor.
The maximum acceptab... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2 Transmit ON/OFF Time mask | The time mask transmit ON/OFF defines the tramping time allowed for the UE between transmit OFF power and transmit ON power. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.1 Minimum Requirement | The transmit power level versus time shall meet the mask specified in figure 5.3, where the transmission period refers to the burst without guard period for a single transmission slot, and to the period from the beginning of the burst in the first transmission slot to the end of the burst without guard period in the la... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.1 Rationales | A time mask should be included for relevant UE transmit power on/off scenarios. Requirements should be specified to limit impact on system performance and allow reasonable implementation.
To limit impact on the system performance, the time allowed for ramping should be small compared to the time period of continuous tr... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.1.1 Timing advance | For large cells, the timing advance is necessary, otherwise channel estimation will not work properly. Currently, a cell radius of having 8.7km for rural/macro case is assumed for illustration. This corresponds to round trip delay of 58s. 29us for timing advance is expected.. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.2 Switching time | Based on state-of-art semiconductor technology, about 10us of switching time could be expected to easy to handle and implementation in UE side. |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.3 Delay spread | Under typical urban fading conditions, delay spread is mostly not greater than 3.125s (4chips) |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.5.2.4 BS Synchronization accuracy | The timing error of BSs synchronized to each other shall be less than 3.125us (4chips)
The figure 5.4 illustrates a situation,
Figure 5.4: Cell with timing advance
Based on above analysis and consideration, the 13chips(10us) period in 1.28 Mcps TDD UE is feasible for ramp up.
Considering the easy implementation aspects... |
1cc4b09fd057c9a5cf925fb9b5a5f4e7 | 25.945 | 5.2.6 Output RF spectrum emissions |
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