Using a Standard Setup (LTE)

To select an LTE Long Term Evolution standard preset configuration:

  1. Set Duplex Mode to TDD or FDD
  2. Set Direction to Uplink or Downlink
  3. Click MeasSetup > LTE Demod Properties > Format tab > Preset to Standard and select a bandwidth

Below is a list of available LTE bandwidths that the LTE demodulator can be preset to. 

Available Bandwidths
1.4 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second. (6 RB Resource Block)
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.

Preset to Standard Settings

LTE Demod Properties dialog box defaults

Parameter

Default Value

Analysis Start Boundary

Frame

Antenna Detection Threshold

-36 dB

Antenna Group  

Num Elements

4

Element Spacing

0.5 x Wavelength

Auto-detect Power Levels

Selected

Cell ID

Auto

Composite Include

Downlink channels selected: QPSK Quadrature phase shift keying, 16QAM, 64QAM, P-SS Primary Synchronization Signal, S-SS Secondary Synchronization Signal, PBCH Physical Broadcast Channel, PCFICH Physical Control Format Indicator Channel, PHICH Physical Hybrid ARQ Indicator Channel, PDCCH Physical Downlink Control Channel, RS

Uplink channels selected: User_01 PUSCH Physical Uplink Shared Channel, User_01 PUSCH DMRS

CP 1) Contention period, or 2) Cyclic prefix Length

Auto

DCI Downlink Control Information Formats 1, 1B, 1D Detection Include

Formats 1 and 1B

Dw/GP Guard Period (LTE TDD)/Up Len (TDD Time Division Duplex: A duplexing technique dividing a radio channel in time to allow downlink operation during part of the frame period and uplink operation in the remainder of the frame period. only)

0

Equalizer Training

Downlink

RS

Moving Avg. Filter check box: selected

Moving Avg. Filter value: 19 RS

Uplink

RS+Data, ZF

EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format. Minimization

Downlink

Type: 3GPP when possible (single C-RS Cell-specific RS antenna port), Tracking otherwise

Amplitude, Timing, and Frequency/Phase selected.

Uplink

Type: 3GPP

Amplitude, Timing, and Frequency/Phase selected, and IQ Offset selected.

EVM Window Length

3GPP

Exclude EVM Transient Time Cleared

Expected Num. of Users

3

Extended Freq Lock

Cleared

Frequency Span

The frequency span is determined by the sample rate and FFT Fast Fourier Transform: A mathematical operation performed on a time-domain signal to yield the individual spectral components that constitute the signal. See Spectrum. size, which are set according to the LTE standard for the specified bandwidth.

Bandwidth

Span

1.4 MHz 1.5 MHz
3 MHz 3 MHz
5 MHz 6 MHz
10 MHz 12 MHz
15 MHz 24 MHz
20 MHz 24 MHz

Half Subcarrier Shift

Selected

Include Inactive Paths

Cleared

Measurement Interval

as many slots as possible up to 3 slots

Measurement Offset

0 slots, 0 symbol-times

MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas. Decoding

3GPP MIMO Decoding

Mirror Freq. Spectrum

Cleared

Non-alloc

Cleared

Normalize Chan. Freq. Resp.

Selected

Num of C-RS Ports

1

Latest PMI Precoding Matrix Indicator report on PUSCH  

DCI Format 2 PMI Report

1 Layer: 0

2 Layers: 0

3 Layers: 0

4 Layers: 0

DCI Format 1B PMI Report

1 Layer: 0

P-SS/S-SS Ant Port

Port 0

PBCH Bits

Mapped

PCFICH Bits

Mapped

PDCCH Bits

Mapped

PDSCH Physical Downlink Shared Channel Bits

Mapped

PDSCH Cell Specific Ratio

r_B/r_A = 1

Power Boost Normalize

Selected

PUCCH Physical Uplink Control Channel Bits

Mapped

PUCCH Decode Parameters

 

HARQ Hybrid Automatic Repeat Request-ACK Acknowledgement

Auto: selected

Info Size: 0

CQI Channel Quality Indicator/PMI

Auto: selected

Info Size: 0

PUSCH Bits

Mapped

PUSCH Decode Parameters

 

HARQ-ACK

Auto: selected

Info Size: 0

Offset Index: 0

RI Rank Indicator

Auto: selected

Info Size: 0

Offset Index: 0

CQI/PMI

Auto: selected

Info Size: 0

Offset Index: 2

PUSCH DFT discrete Fourier transform Swap

Cleared

RA 1) Random Access, or 2) Receiver Address-RNTI Radio Network Temporary Identifier Range

Min = 0, Max = 0

RB Auto Detect

Selected

RB Auto Detect Mode

Power Based

Ref Meas Channel

Ch1 (Rx0)

Ref C-RS Port

Cleared, Port 0

Report EVM in dB

Cleared

Report Relative Power Levels

Selected

Result Length

as many slots as possible up to 3 slots

RS-PRS

3GPP

Symbol Timing Adjust

Max of EVM Window Start / End

Sync Type

Downlink: P-SS

Uplink: PUSCH DM-RS DeModulation Reference Signal (LTE)

Time Scale Factor

1

TPC Transmit Power Control-RNTI Range

Min = 0, Max = 0

UL Up Link (reverse link: from cell phone to base station)/DL Down Link (forward link: from base station to cell phone) Config (TDD only)

0

Uplink Present in Signal Cleared

UE User Equipment (e.g. cell phone)-specific RS weights

 

Compensate Chan Freq Resp

Selected

Display Weights in Real/Imag Format

Selected

Weights Display Mode

Per User
Use Multicarrier Filter Cleared
LTE Allocation Editor (Edit User Mapping...) defaults

Parameter

Default Value

Downlink

 

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

 

 

PDSCH tab

 

EPRE

0

CW0 Mod Type

Selected

Precoding

TxDiv

 

 

Uplink

 

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

SRS Signaling Reference Signal

Present in Signal: Cleared

Include in Analysis: Disabled

PRACH Physical Random Access Channel

Present in Signal: Cleared

Include in Analysis: Disabled

 

 

PUSCH

 

Auto Sync

Selected

Sync Slot

0

Freq. Hopping

Off

Freq.HopMode Inter-SF 1) Spreading Factor, or 2) service flow: A unidirectional flow of medium access control (MAC) service data units (SDUs) on a connection that is provided a particular Quailty of Service (QoS).

NRBHO 1) Hopping Offset (LTE), or 2) Handover: The process in which an mobile station (MS) migrates from the air-interface provided by one base station (BS) to the air-interface provided by another base station (BS). Two HO variants are definded: -break-before-make HO: A HO where service with the target BS starts after a disconnection of service with the previous serving BS. - make-before-break HO: A HO where service with the target BS starts before disconnection of the service with the previous serving BS.

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

 

 

PUCCH

 

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

 

 

SRS

 

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

 

 

PRACH

 

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

LTE Downlink Control Channel Properties (Edit Control Params...) defaults: Basic Tab

Parameter

Default Value

P-SS Power Boost

0 dB

S-SS Power Boost

0 dB

PBCH Power Boost

0 dB

PCFICH Power Boost

0 dB

RS Power Boost

0 dB

 

 

PDCCH Power Boost

0 dB

PDCCH Power Boost +/- Increments

1 dB

PDCCH Allocations

 

Auto

Selected

Const

Selected

 

 

PHICH Power Boost

0 dB

PHICH Power Boost +/- Increments

1 dB

PHICH Despread IQ Orthog Seq Index

Cleared

PHICH Allocation (Ng)

Auto

PHICH Duration

Auto

Mi Definition

Standard

LTE Downlink Control Channel Properties (Edit Control Params...) defaults: MBMS Multimedia Broadcast Multicast Service/P-RS Tab

Parameter

Default Value

P-RS Positioning Reference Signal 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 Multicast-Broadcast Single Frequency Network Reference Signal Power Boost 0 dB
MBSFN Subframe Config All cleared
PMCH Physical Multicast Channel Power Boost 0 dB

See Also

Setting up an LTE Measurement

Troubleshooting

LTE Demod Properties Dialog Box