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Made some progress, per snr sweep is plotted now, the satellites orbital shift is used in calculated now, code is prepared for more than one mcs value

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ti_mo
2026-06-05 21:50:43 +02:00
parent 78b271247c
commit ec472a44e8
4 changed files with 76 additions and 32 deletions
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lab_4/simulateTransmission.m
+10 -8
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@@ -1,5 +1,6 @@
function numPacketErrors = simulateTransmission(cfgEHT, channel, snr, packets, maxNumErrors, simParameters, chanBW, substreamIndex)
function [numPacketErrors, numPacketsSimulated ]= simulateTransmission(cfgEHT, channel, maxChDelay, snr, maxNumPackets, maxNumErrors, simParameters, chanBW, substreamIndex, elevationAngles)
numPacketErrors = 0;
numPacketsSimulated = 0;
ofdmInfo = wlanEHTOFDMInfo('EHT-Data', cfgEHT);
ind = wlanFieldIndices(cfgEHT);
@@ -14,15 +15,16 @@ function numPacketErrors = simulateTransmission(cfgEHT, channel, snr, packets, m
snrVal = convertSNR(snr, "snrsc", "snr", FFTLength=ofdmInfo.FFTLength, NumActiveSubcarriers=ofdmInfo.NumTones);
for packetIdx = 1:packets
if numPacketErrors >= maxNumErrors
break;
end
while numPacketErrors < maxNumErrors && numPacketsSimulated < maxNumPackets
numPacketsSimulated = numPacketsSimulated + 1;
packetElevationAngle = elevationAngles(numPacketsSimulated);
channel.SatelliteDopplerShift = dopplerShiftCircularOrbit(packetElevationAngle, simParameters.SatelliteAltitude, simParameters.MobileAltitude, simParameters.CarrierFrequency);
txPSDU = randi([0 1], psduLength(cfgEHT) * 8, 1);
tx = wlanWaveformGenerator(txPSDU, cfgEHT);
txPad = [tx; zeros(50, cfgEHT.NumTransmitAntennas)];
txPad = [tx; zeros(maxChDelay, cfgEHT.NumTransmitAntennas)];
reset(channel);
rx = awgn(channel(txPad), snrVal);
@@ -37,12 +39,12 @@ function numPacketErrors = simulateTransmission(cfgEHT, channel, snr, packets, m
coarseFrequencyOffset = wlanCoarseCFOEstimate(lstf, chanBW);
rx = frequencyOffset(rx, simParameters.SampleRate, -coarseFrequencyOffset);
nonhtfields = rx(coarsePacketOffset + (ind.LSTF(1) : ind.LSTF(2)), :);
nonhtfields = rx(coarsePacketOffset + (ind.LSTF(1) : ind.LSIG(2)), :);
finePacketOffset = wlanSymbolTimingEstimate(nonhtfields, chanBW);
packetOffset = coarsePacketOffset + finePacketOffset;
if packetOffset > 50
if packetOffset > maxChDelay
numPacketErrors = numPacketErrors + 1;
continue;
end