ti_mo
119 lines
4.1 KiB
Matlab
119 lines
4.1 KiB
Matlab
carrier_frequency = 2.4e9;
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wifi_be_subcarrier_spacing = 78.125e3;
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leo_altitude = 600e3;
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bandwidth = 20;
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mcs_values = [2];
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apep = 1000;
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tx_antenna_count = 1;
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rx_antenna_count = 1;
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snrs = (0:1:40);
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packets_per_snr = 1024;
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maxNumErrors = 50;
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% elevation_angle = 50;
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elevationAngles = [ ...
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linspace(10, 90, ceil(packets_per_snr / 2)), ...
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linspace(90, 10, floor(packets_per_snr / 2)) ...
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];
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meanElevationAngle = mean(elevationAngles);
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slantRanges = arrayfun(@(el) slantRangeCircularOrbit(el, leo_altitude, 0), elevationAngles);
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dopplerShifts = arrayfun(@(el) dopplerShiftCircularOrbit(el, leo_altitude, 0, carrier_frequency), elevationAngles);
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random_stream = "mt19937ar with seed";
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seed = 666;
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ntn_tdl_delay_profiles = ["A" "B" "C" "D"];
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[cfgEHT, simParameters, channel, chInfo, maxChDelay, satelliteDopplerShift, chanBW] = ...
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create_baseline_configuration(ntn_tdl_delay_profiles(3), bandwidth, false, "None", ...
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carrier_frequency, 0, ...
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0, leo_altitude, random_stream, ...
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seed, tx_antenna_count, ...
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rx_antenna_count, apep);
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meanSlantRange = mean(slantRanges);
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meanSatelliteDopplerShift = mean(dopplerShifts);
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meanNormalizedCFO = meanSatelliteDopplerShift / wifi_be_subcarrier_spacing;
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disp("Mean Elevation Angle: " + meanElevationAngle + "°")
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disp("Mean Slant Range: " + meanSlantRange + "m")
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disp("Mean Satellite Doppler Shift: " + meanSatelliteDopplerShift + "Hz")
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disp("Normalized CFO: " + meanNormalizedCFO)
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errorCounts = zeros(numel(mcs_values), numel(snrs));
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packetCounts = zeros(numel(mcs_values), numel(snrs));
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errorRates = zeros(numel(mcs_values), numel(snrs));
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cfrMagnitudesBySnr = cell(numel(mcs_values), numel(snrs));
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for imcs = 1 : numel(mcs_values)
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cfgEHT.User{1}.MCS = mcs_values(imcs);
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errorCountsForMcs = zeros(1, numel(snrs));
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packetCountsForMcs = zeros(1, numel(snrs));
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errorRatesForMcs = zeros(1, numel(snrs));
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cfrMagnitudesForMcs = cell(1, numel(snrs));
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parfor snr_idx = 1 : length(snrs)
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local_channel = clone(channel);
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[errorCount, packetCount, cfrMagnitudes] = simulateTransmission(cfgEHT, local_channel, maxChDelay, snrs(snr_idx), packets_per_snr, maxNumErrors, simParameters, chanBW, snr_idx, elevationAngles);
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errorCountsForMcs(snr_idx) = errorCount;
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packetCountsForMcs(snr_idx) = packetCount;
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errorRatesForMcs(snr_idx) = errorCount / packetCount;
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cfrMagnitudesForMcs{snr_idx} = cfrMagnitudes;
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end
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errorCounts(imcs, :) = errorCountsForMcs;
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packetCounts(imcs, :) = packetCountsForMcs;
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errorRates(imcs, :) = errorRatesForMcs;
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cfrMagnitudesBySnr(imcs, :) = cfrMagnitudesForMcs;
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end
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markers = 'ox*sd^v><ph+ox*sd^v><ph+';
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figure;
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for imcs = 1 : numel(mcs_values)
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semilogy(snrs, errorRates(imcs, :).',['-' markers(imcs)]);
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hold on;
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end
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grid on;
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xlabel('SNR (dB)');
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ylabel('PER');
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% task 1
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dataStr = arrayfun(@(x)sprintf('MCS %d', x), mcs_values, 'UniformOutput', false);
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% task 4
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% dataStr = arrayfun(@(x)'MCS Sweep Values: [0 2 4 8 10 12 13]', 'UniformOutput', false);
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legend(dataStr, 'Location', 'NorthEastOutside');
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title(['PER (EHT MU), ' num2str(cfgEHT.ChannelBandwidth) ', NTN-TDL-C, ' num2str(tx_antenna_count) '-by-' num2str(rx_antenna_count)]);
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cfrMagnitudes = [];
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for snr_idx = 1 : numel(snrs)
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cfrMagnitudes = [cfrMagnitudes cfrMagnitudesBySnr{1, snr_idx}];
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end
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%{ for testing purposes
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if ~isempty(cfrMagnitudes)
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figure;
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packetPlots = plot(cfrMagnitudes, 'Color', [0.75 0.75 0.75]);
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hold on;
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meanCfrPlot = plot(mean(cfrMagnitudes, 2), 'b', 'LineWidth', 2);
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grid on;
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xlabel("Subcarrier index");
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ylabel("|H[k]|");
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legend([packetPlots(1) meanCfrPlot], ["Packets" "Mean CFR"], 'Location', 'best');
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title("CFR magnitude for collected packets");
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end
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%}
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% extract a representative packet for cfr plot
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representativeSnr = 25;
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representativeSnrIdx = find(snrs == representativeSnr);
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representativeCfrs = cfrMagnitudesBySnr{1, representativeSnrIdx};
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representativeCfr = representativeCfrs(:, 1);
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figure;
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plot(representativeCfr);
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grid on;
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xlabel("Subcarrier index");
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ylabel("|H[k]|");
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title("CFR magnitude for representative packet at 25 dB SNR"); |