To select an LTE standard preset configuration:
Below is a list of available LTE bandwidths that the LTE demodulator can be preset to.
Available Bandwidths |
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1.4 MHz (6 RB) |
3 MHz (15 RB) |
5 MHz (25 RB) |
10 MHz (50 RB) |
15 MHz (75 RB) |
20 MHz (100 RB) |
In addition to bandwidth, presetting the demodulator also sets the measurement parameters to the default values listed in the following section. Click on one of the links below to jump to the corresponding table.
Parameter |
Default Value |
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Analysis Start Boundary |
Frame |
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Antenna Detection Threshold |
-36 dB |
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Antenna Group | |||||||||||||||
Num Elements |
4 | ||||||||||||||
Element Spacing |
0.5 x Wavelength | ||||||||||||||
Auto-detect Power Levels |
Selected |
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Cell ID |
Auto |
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Composite Include |
Downlink channels selected: QPSK, 16QAM, 64QAM, P-SS, S-SS, PBCH, PCFICH, PHICH, PDCCH, RS Uplink channels selected: User_01 PUSCH, User_01 PUSCH DMRS |
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CP Length |
Auto |
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DCI Formats 1, 1B, 1D Detection Include |
Formats 1 and 1B |
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0 |
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Equalizer Training |
Downlink RS Moving Avg. Filter check box: selected Moving Avg. Filter value: 19 RS Uplink RS+Data, ZF |
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EVM Minimization |
Downlink Type: 3GPP when possible (single C-RS antenna port), Tracking otherwise Amplitude, Timing, and Frequency/Phase selected. Uplink Type: 3GPP Amplitude, Timing, and Frequency/Phase selected, and IQ Offset selected. |
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EVM Window Length |
3GPP |
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Exclude EVM Transient Time | Cleared | ||||||||||||||
Expected Num. of Users |
3 |
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Extended Freq Lock |
Cleared |
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Frequency Span |
The frequency span is determined by the sample rate and FFT size, which are set according to the LTE standard for the specified bandwidth.
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Half Subcarrier Shift |
Selected |
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Include Inactive Paths |
Cleared |
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Measurement Interval |
as many slots as possible up to 3 slots |
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Measurement Offset |
0 slots, 0 symbol-times |
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MIMO Decoding |
3GPP MIMO Decoding |
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Mirror Freq. Spectrum |
Cleared |
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Non-alloc |
Cleared |
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Normalize Chan. Freq. Resp. |
Selected |
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Num of C-RS Ports |
1 |
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Latest PMI report on PUSCH | |||||||||||||||
DCI Format 2 PMI Report |
1 Layer: 0 2 Layers: 0 3 Layers: 0 4 Layers: 0 |
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DCI Format 1B PMI Report |
1 Layer: 0 | ||||||||||||||
P-SS/S-SS Ant Port |
Port 0 |
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PBCH Bits |
Mapped |
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PCFICH Bits |
Mapped |
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PDCCH Bits |
Mapped |
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PDSCH Bits |
Mapped |
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PDSCH Cell Specific Ratio |
r_B/r_A = 1 |
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Power Boost Normalize |
Selected |
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PUCCH Bits |
Mapped |
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PUCCH Decode Parameters |
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Auto: selected Info Size: 0 |
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CQI/PMI |
Auto: selected Info Size: 0 |
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PUSCH Bits |
Mapped |
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PUSCH Decode Parameters |
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HARQ-ACK |
Auto: selected Info Size: 0 Offset Index: 0 |
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Auto: selected Info Size: 0 Offset Index: 0 |
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CQI/PMI |
Auto: selected Info Size: 0 Offset Index: 2 |
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PUSCH DFT Swap |
Cleared |
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Min = 0, Max = 0 |
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RB Auto Detect |
Selected |
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RB Auto Detect Mode |
Power Based |
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Ref Meas Channel |
Ch1 (Rx0) |
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Ref C-RS Port |
Cleared, Port 0 |
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Report EVM in dB |
Cleared |
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Report Relative Power Levels |
Selected |
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Result Length |
as many slots as possible up to 3 slots |
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RS-PRS |
3GPP |
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Symbol Timing Adjust |
Max of EVM Window Start / End |
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Sync Type |
Downlink: P-SS Uplink: PUSCH DM-RS |
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Time Scale Factor |
1 |
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TPC-RNTI Range |
Min = 0, Max = 0 |
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0 |
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Uplink Present in Signal | Cleared | ||||||||||||||
UE-specific RS weights |
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Compensate Chan Freq Resp |
Selected | ||||||||||||||
Display Weights in Real/Imag Format |
Selected | ||||||||||||||
Weights Display Mode |
Per User | ||||||||||||||
Use Multicarrier Filter | Cleared |
Parameter |
Default Value |
---|---|
Downlink |
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RB Auto Detect |
Selected |
RB Auto Detect Mode |
Power Based |
Auto-detect Power Levels |
Selected |
Use Per-antenna EPRE |
Selected |
Multi-Frame Analysis (single-channel, TDD only) |
Cleared |
Show Mapping (single-channel, TDD only) |
Frame0 |
Include QPSK |
Selected |
Include QAM16 |
Selected |
Include QAM64 |
Selected |
RNTI |
Disabled, 1 |
UE-specific RS |
|
Present |
Cleared |
Include |
Cleared |
Power(dB) |
0 dB |
Port |
Port5 |
NSCID |
0 |
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PDSCH tab |
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EPRE |
0 |
CW0 Mod Type |
Selected |
Precoding |
TxDiv |
|
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Uplink |
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RB Auto Detect |
Selected |
Auto-detect Mode | Power Based |
Cell ID |
0 |
RNTI |
0 |
Frame No. |
0 |
Group Hop |
Cleared |
Seq Hop |
Cleared |
PUSCH |
Present in Signal: Selected Include in Analysis: Selected |
PUCCH |
Present in Signal: Cleared Include in Analysis: Disabled |
Present in Signal: Cleared Include in Analysis: Disabled |
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Present in Signal: Cleared Include in Analysis: Disabled |
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PUSCH |
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Auto Sync |
Selected |
Sync Slot |
0 |
Freq. Hopping |
Off |
Freq.HopMode | Inter-SF |
NRBHO |
0 |
NSB |
1 |
Auto-calculate per-slot params |
Selected |
nDMRS(1) |
0 |
nDMRS(2) |
0 |
DSS |
0 |
PRB Start |
0 |
PRB End |
0 |
Mod Type |
QPSK |
Power (dB) |
0 |
DMRS Group (u) |
0 |
DMRS Seq (v) |
0 |
DMRS Cyclic Shift |
0 |
DMRS Power (dB) |
0 |
Mirroring |
0 |
|
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PUCCH |
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Auto Sync |
Cleared |
Sync Slot |
0 |
Auto-calculate |
Selected |
NRB(2) |
0 |
NCS(1) |
0 |
nPUCCH(2) |
0 |
DshiftPUCCH |
1 |
Auto-detect Format/nPUCCH(1) | Selected |
First RB |
0 |
Format |
Type 1 |
Cyclic Shift |
0 |
OS |
Index0 |
Power (dB) |
0 |
DMRS Group (u) |
0 |
DMRS Power (dB) |
0 |
nPUCCH(1) |
0 |
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SRS |
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Auto Sync |
Selected |
Sync Slot |
1 |
Cyclic Shift(nSRSCS) |
0 |
Power (dB) |
0 |
SRS Bandwidth(BSRS) |
0 |
SRS BW Config(CSRS) |
7 |
SRS Hopping BW(bhop) |
3 |
Tx Comb(kTC) |
0 |
Freq Dom Pos(nRRC) |
0 |
Subframe Config |
0 |
Config Index(ISRS) |
0 |
SRS MaxUpPTS (TDD only) |
False |
SRS NraS1 (TDD only) |
0 |
SRS NraS6 (TDD only) |
0 |
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PRACH |
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NRAPRBoffset |
0 |
Configuration Index |
0 |
Logical Root Seq Index |
0 |
Cyclic Shift Set |
Unrestricted |
NCS Configuration |
0 |
Preamble Index |
0 |
Power (dB) |
0 |
Sync Resource (TDD only) |
0 |
Parameter |
Default Value |
---|---|
P-RS Active | Cleared |
P-RS Bandwidth | Same as LTE Frame bandwidth |
MBSFN Active | Cleared |
MBSFN Area ID | 0 |
MBSFN Non-MBSFN region length | 1 |
MBSFN-RS Power Boost | 0 dB |
MBSFN Subframe Config | All cleared |
PMCH Power Boost | 0 dB |
See Also
LTE Demod Properties Dialog Box
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