Community Profile

photo

Graham Freeland


Last seen: 2 months ago

MathWorks

37 total contributions since 2013

Graham Freeland's Badges

  • First Review
  • Knowledgeable Level 2
  • Revival Level 2
  • First Answer

View details...

Contributions in
View by

Answered
Usage of CSI-RS in 5G NR
The CSI-RS in use are signalled to a UE through common and dedicated L3/RRC signalling. Take a look at the RRC ASN in 38.331 for...

5 months ago | 0

Answered
lteDCIResourceAllocation calculation with SI-RNTI
These functions assume non-SI layout of the DCI messages so you can't indicate different message field layouts and interpretatio...

8 months ago | 0

Answered
Incorrect CDL/TDL modeling in 5G toolbox and LTE toolbox
This misinterpretation was recently fixed in the respective products: https://www.mathworks.com/support/bugreports/details/2064...

11 months ago | 0

| accepted

Answered
Are the 5G toolbox functions coder friendly? I am getting errors while generating C++ code for some 5G toolbox functions. (v2019a)
Hi Pranjali, Regarding the dynamic array sizes, can you state the specific functions that you are referring to, and, if appropr...

11 months ago | 0

Answered
5g polar coding charts
See this previous answer: Polar Coding Performance Graham

1 year ago | 0

Answered
5G library uplink functions
The R2019a release of the 5G Toolbox product adds support for the NR uplink: https://www.mathworks.com/products/5g.html Graham...

1 year ago | 0

Answered
5G Toolbox: will there be any support for uplink channels?
The R2019a release of the 5G Toolbox adds support for the NR uplink: https://www.mathworks.com/products/5g.html Graham

1 year ago | 0

Answered
How do you recover bits after using 'lteRMCULTool.m'?
Most of the uplink BLER simulations use the UL RMC Tool to generate an uplink waveform in a piece-wise fashion then decode it us...

1 year ago | 0

| accepted

Answered
how can i generate CP - OFDM as a result of 5g NR result?
Take a look at the 5G Toolbox: https://www.mathworks.com/products/5g.html

1 year ago | 0

| accepted

Answered
lte waveform generation wsing LTETestModelTool
Hi, These are standard defined E-TM waveforms, and therefore they are downlink OFDM with the associated PAPR levels. However, ...

1 year ago | 0

Answered
PUSCH Throughput Conformance Test got throughput 0 with ue.RC = 'A4-3'
Should be good, run it and check the throughput curve trend.

1 year ago | 0

| accepted

Answered
PUSCH Throughput Conformance Test got throughput 0 with ue.RC = 'A4-3'
The simulation length will generally depend on the channel doppler. A4-3 is used in reference tests using EPA5 or EVA70 channels...

1 year ago | 0

Answered
PUSCH Throughput Conformance Test got throughput 0 with ue.RC = 'A4-3'
Hi, You'll have to move the SNR range of the simulation up since the code rate is now a lot higher, going from 1/3 (A3-2) to 3/...

1 year ago | 0

Answered
Requesting help with R=2/3 turbo encoding for lte waveform.
Hi, You need to use soft demodulation of the 16QAM symbols, which is the default for that function i.e. Rxbits = lteSymbolDe...

1 year ago | 0

| accepted

Answered
How to add multiple nodes (users) in "Release 14 CV2X example"?
Since the V2X sidelink throughput/BLER simulation is a single link-level simulation, which explicitly lists out the transport an...

2 years ago | 0

Answered
How to run NBIoT BER simulation
Looking over the Release Notes, NB-IoT support generally and that example in particular was not introduced in the LTE Toolbox un...

2 years ago | 1

Answered
5G library uplink functions
The 5G Library Add-On for LTE System Toolbox only supports the downlink. Having said that, there is a lot of commonality between...

2 years ago | 0

Answered
Vehicle to Vehicle (V2V) communications
In terms of LTE based sidelink (PC5) V2X communications, at the L1-L3 link-level, the LTE Toolbox has comprehensive and detailed...

2 years ago | 1

| accepted

Answered
Does anyone have an NBIoT Uplink waveform generator?
Hi there, R2018b of the LTE Toolbox now adds NB-IoT uplink support, as well as LTE-M MTC/eMTC BL/CE modelling. For more info,...

2 years ago | 1

| accepted

Answered
NB-IoT NPUSCH Block Error Rate Simulation and Waveform Generation
Hi there, R2018b of the LTE Toolbox now adds NB-IoT uplink support, as well as LTE-M MTC/eMTC BL/CE modelling. For more info,...

2 years ago | 0

Answered
5G library functions for LTE system toolbox
Hi Shannon, The h5gXXXX functions are, strictly speaking, part of the examples so their documentation is localized to the fun...

2 years ago | 2

| accepted

Answered
Mapping PDSCH and DM-RS symbols to slot grid
'Map to slot grid' just means using the MATLAB assignment operation i.e. slotgrid(pdschindices) = pdschsymbols; slotgrid(pds...

2 years ago | 1

| accepted

Answered
How to install lte5g.mlpkginstall
Hi, The details are here: <https://www.mathworks.com/help/matlab/matlab_env/get-add-ons.html Get Add-Ons> "To install an ...

2 years ago | 1

Answered
5G carrier aggregation parameters
Take a look at 5G NR spec documents, TS 38.101-x. Graham

2 years ago | 0

| accepted

Answered
How to implement list decoding of polar codes in matlab ?
The 3GPP 5G NR polar codes are implemented as part of the <https://www.mathworks.com/matlabcentral/fileexchange/61585-5g-library...

2 years ago | 0

Answered
I was having problem in finding description of the function "mwltelibrary". How can I know about it??
Hi, like you said, this an internal mex function that is part of the LTE System Toolbox implementation. The turbo coding functio...

2 years ago | 0

Answered
3GPP 5G Link Level Modeling Using TDL/CDL Propagation Channels
The 5G NR throughput simulation is implicitly recording the transport block BLER/PER via the blkCRC variable (this indicates whe...

2 years ago | 0

| accepted

Answered
In "LTE Cell Search, MIB and SIB1 Recovery with Two Antennas": Shouldn't we reacquire the signal, once we know the full bandwidth of the system?
The example is designed to work with a single input waveform, for example, an actual capture or a synthetic waveform. This allow...

2 years ago | 0

| accepted

Answered
How to insert QC-LDPC codes into an F-OFDM system?
Hi there, Take a look at the <https://www.mathworks.com/matlabcentral/fileexchange/61585-5g-library-for-lte-system-toolbox 5G...

2 years ago | 0

| accepted

Answered
Questions for NB-IoT NPDSCH Block Error Rate Simulation and Waveform Generation Example
The NB-IoT specific NDPSCH channel is only defined for QPSK (TS 36.211 section 10.2.3.2). The signallable range of transport...

2 years ago | 0

Load more