ulsim: test UCI on PUSCH with matlab
Since there is no UCI on PUSCH implementation in gNB, it is good to test UE's implementation with matlab. This commit allows to test with matlab in two ways: 1. generate OFDM waveform from ulsim and decode it in matlab using uci_on_pusch_decode.m 2. generate codeword in matlab using uci_on_pusch_encode.m read it in ulsim and compare the bits. ulsim option -o is used
This commit is contained in:
Sakthivel Velumani
committed by
alexjiao
alexjiao
parent
83bf140bc3
commit
59ff9ae04e
@@ -0,0 +1,79 @@
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% ULSIM command line
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% ./nr_ulsim -m 27 -u 1 -R 51 -r 51 -s 300 -L 4 -o
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carrier = nrCarrierConfig;
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carrier.NSizeGrid = 51;
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carrier.NSlot = 8;
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carrier.SubcarrierSpacing = 30;
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carrier.CyclicPrefix = "normal";
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pusch = nrPUSCHConfig;
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pusch.PRBSet = 0:carrier.NSizeGrid-1;
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pusch.SymbolAllocation = [0,12];
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pusch.MappingType = "B";
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pusch.NID = 0;
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pusch.RNTI = 4660;
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pusch.NumLayers = 1;
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pusch.TransformPrecoding = false;
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pusch.TransmissionScheme = "nonCodebook";
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pusch.NumAntennaPorts = 1;
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pusch.TPMI = 0;
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pusch.Modulation = "64QAM";
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pusch.DMRS.DMRSConfigurationType = 1;
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pusch.DMRS.DMRSTypeAPosition = 2;
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pusch.DMRS.NumCDMGroupsWithoutData = 1;
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pusch.DMRS.DMRSAdditionalPosition = 0;
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pusch.DMRS.NIDNSCID = 0;
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pusch.DMRS.NRSID = 0;
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pusch.DMRS.NSCID = 0;
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pusch.DMRS.GroupHopping = 0;
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pusch.DMRS.SequenceHopping = 0;
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pusch.BetaOffsetACK = 20;
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pusch.BetaOffsetCSI1 = 6.25;
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pusch.BetaOffsetCSI2 = 1;
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pusch.UCIScaling = 1;
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[puschIndices,puschIndicesInfo] = nrPUSCHIndices(carrier,pusch);
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dmrsLayerSymbols = nrPUSCHDMRS(carrier,pusch);
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dmrsLayerIndices = nrPUSCHDMRSIndices(carrier,pusch);
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run("../../../cmake_targets/ran_build/build/txsig0.m");
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rxGrid = nrOFDMDemodulate(carrier,txs0);
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[estChannelGrid,noiseEst] = nrChannelEstimate(carrier,rxGrid,dmrsLayerIndices,dmrsLayerSymbols);
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[puschRx,puschHest] = nrExtractResources(puschIndices,rxGrid,estChannelGrid);
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[puschEq,csi] = nrEqualizeMMSE(puschRx,puschHest,noiseEst);
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decodeULSCH = nrULSCHDecoder;
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decodeULSCH.MultipleHARQProcesses = false;
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decodeULSCH.CBGTransmission = false;
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decodeULSCH.TargetCodeRate = 910 / 1024;
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decodeULSCH.LDPCDecodingAlgorithm = 'Normalized min-sum';
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decodeULSCH.MaximumLDPCIterationCount = 6;
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decodeULSCH.TransportBlockLength = 37896;
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oack = 3;
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ocsi1 = 0;
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ocsi2 = 0;
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[ulschLLRs,rxSymbols] = nrPUSCHDecode(carrier,pusch,decodeULSCH.TargetCodeRate,...
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decodeULSCH.TransportBlockLength,oack,ocsi1,ocsi2,puschEq,noiseEst);
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rmInfo = nrULSCHInfo(pusch,decodeULSCH.TargetCodeRate,...
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decodeULSCH.TransportBlockLength,oack,ocsi1,ocsi2);
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[culsch,cack,ccsi1,ccsi2] = nrULSCHDemultiplex(pusch,decodeULSCH.TargetCodeRate,...
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decodeULSCH.TransportBlockLength,oack,ocsi1,ocsi2,ulschLLRs);
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plot(rxSymbols,'*');
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decodeULSCH.reset();
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rv = 0; % Redundancy version for decoding
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[decodedBits,blkerr] = decodeULSCH(culsch,pusch.Modulation,pusch.NumLayers,rv);
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% Display the decoded bits
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disp('Block error:');
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disp(blkerr);
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ucibits = nrUCIDecode(cack,oack);
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% Display the decoded UCI bits
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disp('Decoded UCI bits:');
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disp(ucibits);
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@@ -0,0 +1,85 @@
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% ulsim command for same pusch config
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% ./nr_ulsim -m 27 -u 1 -R 51 -r 51 -s 300 -o uci_on_pusch_7.bin
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carrier = nrCarrierConfig;
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carrier.NSizeGrid = 51;
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carrier.NSlot = 8;
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carrier.SubcarrierSpacing = 30;
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carrier.CyclicPrefix = "normal";
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pusch = nrPUSCHConfig;
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pusch.PRBSet = 0:carrier.NSizeGrid-1;
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pusch.SymbolAllocation = [0,12];
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pusch.MappingType = "B";
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pusch.NID = 0;
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pusch.RNTI = 4660;
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pusch.NumLayers = 1;
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pusch.TransformPrecoding = false;
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pusch.TransmissionScheme = "nonCodebook";
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pusch.NumAntennaPorts = 1;
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pusch.TPMI = 0;
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pusch.Modulation = "64QAM";
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pusch.DMRS.DMRSConfigurationType = 1;
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pusch.DMRS.DMRSTypeAPosition = 2;
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pusch.DMRS.NumCDMGroupsWithoutData = 1;
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pusch.DMRS.DMRSAdditionalPosition = 0;
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pusch.DMRS.NIDNSCID = 0;
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pusch.DMRS.NRSID = 0;
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pusch.DMRS.NSCID = 0;
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pusch.DMRS.GroupHopping = 0;
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pusch.DMRS.SequenceHopping = 0;
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pusch.BetaOffsetACK = 20;
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pusch.BetaOffsetCSI1 = 6.25;
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pusch.BetaOffsetCSI2 = 1;
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pusch.UCIScaling = 1;
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A = 37896;
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rate = 910 / 1024;
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rv = 0;
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modulation = pusch.Modulation;
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nlayers = pusch.NumLayers; % Number of layers for decoding
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oack = 7;
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ocsi1 = 0;
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ocsi2 = 0;
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cbsInfo = nrULSCHInfo(pusch, rate, A, oack, ocsi1, ocsi2); % Get ULSCH information
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ack = randi([0 1],oack,1);
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csi1 = randi([0 1],ocsi1,1);
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csi2 = randi([0 1],ocsi2,1);
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cack = nrUCIEncode(ack,cbsInfo.GACK,pusch.Modulation);
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ccsi1 = [];
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ccsi2 = [];
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tb_data = randi([0 1],A,1);
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% Transport block CRC attachment
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tbIn = nrCRCEncode(tb_data,cbsInfo.CRC);
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% Code block segmentation and CRC attachment
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cbsIn = nrCodeBlockSegmentLDPC(tbIn,cbsInfo.BGN);
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% LDPC encoding
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enc = nrLDPCEncode(cbsIn,cbsInfo.BGN);
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% Rate matching and code block concatenation
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chIn = nrRateMatchLDPC(enc,cbsInfo.GULSCH,rv,modulation,nlayers);
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culsch = chIn;
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% Get the codeword and locations of each type (data and UCI)
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[cw,indInfo] = nrULSCHMultiplex(pusch,rate,A,culsch,cack,ccsi1,ccsi2);
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cw_scr = nrPUSCHScramble(cw,pusch.NID,pusch.RNTI);
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% Write to bin file
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fid = fopen('uci_on_pusch_7.bin', 'wb');
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to_write = [A,oack,ocsi1,ocsi2,length(cw),length(cw_scr)];
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fwrite(fid, to_write, 'uint32'); % Write the data to the binary file
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fwrite(fid, tb_data, "uint8");
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fwrite(fid, ack, "uint8");
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fwrite(fid, csi1, "uint8");
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fwrite(fid, csi2, "uint8");
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fwrite(fid, cw, "uint8");
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fwrite(fid, cw_scr, "uint8");
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fclose(fid); % Close the file after writing
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