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test.m
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clear all;
SNR = 30;
% txBits = randi([0 1], 1, 96 * 10^3);
dataConfig = lrwpan.MACFrameConfig('FrameType', 'Data');
FFTLength = 64;
OSR = 20;
%% WiFi sender link
% Waveform configuration
cfgNonHT = wlanNonHTConfig;
cfgNonHT.Modulation = 'OFDM';
cfgNonHT.ChannelBandwidth = 'CBW20'; % Channel bandwidth
cfgNonHT.NumTransmitAntennas = 1; % Number of transmit antennas
cfgNonHT.MCS = 7; % Modulation and coding scheme
cfgNonHT.PSDULength = 3885; % 2580;
cfgNonHT.BandwidthOperation = 'Static';
%% Channel
% Channel settings
Channel = wlanTGnChannel;
Channel.DelayProfile = 'Model-B';
Channel.CarrierFrequency = 2.442e9; % 2.442GHz
Channel.NumTransmitAntennas = cfgNonHT.NumTransmitAntennas;
Channel.NumReceiveAntennas = 1;
Channel.TransmitReceiveDistance = 5;
Channel.LargeScaleFadingEffect = 'None'; % 'Pathloss'?
fsWiFi = wlanSampleRate(cfgNonHT);
Channel.SampleRate = fsWiFi;
cfWiFi = Channel.CarrierFrequency;
payload = dec2hex(randi([0 2 ^ 8 - 1], 7, 1), 2);
txBits = lrwpan.MACFrameGenerator(dataConfig, payload);
% Generate waveform of WiFi packet payload.
[objZigBeeSignal, txSyms, numPkt] = zigbee_txer(txBits', 20, true);
subcrWidth = 0.3125; % Bandwith of a WiFi subcarrier (MHz).
subShift = 0;
freqShift = (subcrWidth * subShift) / 20; % MHz
txSignal = zeros(size(objZigBeeSignal, 1) - (OSR / 2), size(objZigBeeSignal, 2));
field = 'NonHT-Data';
QAMEmuSignal = zeros(size(objZigBeeSignal, 1), 1);
numSampPerWiFiSym = 80;
numWiFisym = ceil(size(txSignal, 1) ./ numSampPerWiFiSym);
for ithPkt = 1:1:size(objZigBeeSignal, 2)
cpFlipIdx = 1;
% for ithWiFiSym = 1:1:numWiFisym
%
% % if mod(cpFlipIdx, 2) == 0
% % rxSignalWiFi(:, ithWiFiSym) = fftshift(fft(objZigBeeSignal((ithWiFiSym - 1) * numSampPerWiFiSym + 17:(ithWiFiSym - 1) * numSampPerWiFiSym + numSampPerWiFiSym, :)));
% % else
% % rxSignalWiFi(:, ithWiFiSym) = fftshift(fft(objZigBeeSignal((ithWiFiSym - 1) * numSampPerWiFiSym + 1:(ithWiFiSym - 1) * numSampPerWiFiSym + FFTLength, :)));
% % end
% %
% % cpFlipIdx = cpFlipIdx + 1;
%
% rxSignalWiFi(:, ithWiFiSym) = fftshift(fft(objZigBeeSignal((ithWiFiSym - 1) * numSampPerWiFiSym + 17:(ithWiFiSym - 1) * numSampPerWiFiSym + numSampPerWiFiSym, :)));
% end
rxObjZigBeeSignal = reshape(objZigBeeSignal(1:1:end - (OSR / 2), :), numSampPerWiFiSym, numWiFisym);
rxObjZigBeeSignal(1:1:16, :) = []; % Remove the CP part.
rxSignalWiFi = fftshift(fft(rxObjZigBeeSignal, [], 1), 1);
rxSignalWiFiRef = rxSignalWiFi;
info = wlanNonHTOFDMInfo(field, cfgNonHT);
ith = 1;
for ithOFDMSym = 1:1:numWiFisym
if mod(ith, 2) == 1
QAMEmuSignal((ithOFDMSym - 1) * numSampPerWiFiSym + 17:(ithOFDMSym - 1) * ...
numSampPerWiFiSym + FFTLength + 16, 1) = ifft(ifftshift(rxSignalWiFiRef(:, ithOFDMSym)), FFTLength);
else
QAMEmuSignal((ithOFDMSym - 1) * numSampPerWiFiSym:(ithOFDMSym - 1) * ...
numSampPerWiFiSym + FFTLength, 1) = ifft(ifftshift(rxSignalWiFiRef(:, ithOFDMSym)), FFTLength);
end
end
% Demodulation based on MATLAB WLAN toolbox.
rxSignalWiFi = rxSignalWiFi(info.ActiveFFTIndices, :);
rxSignalWiFi = rxSignalWiFi .* sqrt(FFTLength);
rxSignalWiFi = rxSignalWiFi(info.DataIndices, :);
rxSignalWiFi(1:1:(size(info.DataIndices, 1) / 2 - 5), :) = 0;
rxSignalWiFi((end - size(info.DataIndices, 1) / 2 + 6):1:end, :) = 0;
if subShift ~= 0
rxSignalWiFi = circshift(rxSignalWiFi, -subShift + 1) + circshift(rxSignalWiFi, subShift - 2);
% rxSignalWiFi = circshift(rxSignalWiFi, -subShift) + circshift(rxSignalWiFi, subShift);
end
% WEBee part.
[txBitsW, scramInit] = webeeBitGenerator(rxSignalWiFi, cfgNonHT);
% Send out emulate signals.
cfgNonHT.PSDULength = length(txBitsW) / 8; % Payload length in bytes
txSignal(:, ithPkt) = wlanNonHTData(txBitsW, cfgNonHT, scramInit);
end
% figure;
% txSignal = txSignal ./ sqrt(FFTLength);
% subplot(3, 1, 1);
% window = hamming(floor(length(txSignal) / 10));
% pwelch(txSignal, window, [], [], fsWiFi, 'centered')
% title('txSignal before frequency shift.')
%
% freqShiftOpt = repmat(exp(1i * 2 * pi * -freqShift * (0:size(txSignal, 1) - 1))', 1, size(txSignal, 2));
% txSignalCH1 = txSignal .* freqShiftOpt;
% subplot(3, 1, 2);
% window = hamming(floor(length(txSignalCH1) / 10));
% pwelch(txSignalCH1, window, [], [], fsWiFi, 'centered')
% title('txSignal CH1 after frequency shift.')
%
%
% txSignal = txSignalCH1 .* sqrt(FFTLength);
% txSignal = lowpass(txSignal, 1.1e6, fsWiFi, 'Steepness', 0.99);
% subplot(3, 1, 3);
% window = hamming(floor(length(txSignal) / 10));
% pwelch(txSignal, window, [], [], fsWiFi, 'centered')
% title('txSignal CH1 after filtering.')
% % freqShiftOpt = repmat(exp(1i * 2 * pi * freqShift * (0:size(QAMEmuSignal, 1) - 1))', 1, size(QAMEmuSignal, 2));
% % QAMEmuSignal = QAMEmuSignal .* freqShiftOpt;
% % QAMEmuSignal = lowpass(QAMEmuSignal, 1.1e6, fsWiFi, 'Steepness', 0.99);
%
% figure;
% subplot(2, 1, 1);
% plot(real(txSignal(1:320, 1)), 'DisplayName', 'tx');
% hold on;
% plot(real(QAMEmuSignal(1:320, 1)), 'DisplayName', 'QAMEmuSignal');
% legend;
% subplot(2, 1, 2);
% plot(imag(txSignal(1:320, 1)), 'DisplayName', 'tx');
% hold on;
% plot(imag(QAMEmuSignal(1:320, 1)), 'DisplayName', 'QAMEmuSignal');
% legend;
airSignal = txSignal;
freqShiftOpt = repmat(exp(1i * 2 * pi * -freqShift * (0:size(airSignal, 1) - 1))', 1, size(airSignal, 2));
rxSignalCH1 = airSignal .* freqShiftOpt;
rxSignalCH1 = lowpass(rxSignalCH1, 1.1e6, fsWiFi, 'Steepness', 0.99);
freqShiftOpt = repmat(exp(1i * 2 * pi * freqShift * (0:size(airSignal, 1) - 1))', 1, size(airSignal, 2));
rxSignalCH2 = airSignal .* freqShiftOpt;
rxSignalCH2 = lowpass(rxSignalCH2, 1.1e6, fsWiFi, 'Steepness', 0.99);
% figure;
% subplot(5, 1, 1);
% window = hamming(floor(length(objZigBeeSignal) / 10));
% pwelch(objZigBeeSignal, window, [], [], fsWiFi, 'centered')
% title('Spectrum of objZigBeeSignal');
% subplot(5, 1, 2);
% window = hamming(floor(length(QAMEmuSignal) / 10));
% pwelch(QAMEmuSignal, window, [], [], fsWiFi, 'centered')
% title('Spectrum of QAMEmuSignal')
% disp(['Sample size of QAMEmuSignal: ', num2str(size(QAMEmuSignal))]);
% subplot(5, 1, 3);
% window = hamming(floor(length(airSignal) / 10));
% pwelch(airSignal, window, [], [], fsWiFi, 'centered')
% title('Spectrum of airSignal')
% disp(['Sample size of airSignal: ', num2str(size(airSignal))]);
% subplot(5, 1, 4);
% window = hamming(floor(length(rxSignalCH1) / 10));
% pwelch(rxSignalCH1, window, [], [], fsWiFi, 'centered')
% title('Spectrum of baseband ZigBee signal (before filtering)')
% disp(['Sample size of basedband ZigBee signal (before filtering): ', num2str(size(rxSignalCH1))]);
% subplot(5, 1, 5);
% window = hamming(floor(length(rxSignalCH1) / 10));
% pwelch(rxSignalCH1, window, [], [], fsWiFi, 'centered')
% hold on;
% window = hamming(floor(length(rxSignalCH2) / 10));
% pwelch(rxSignalCH2, window, [], [], fsWiFi, 'centered')
% title('Spectrum of baseband ZigBee signal (after filtering)')
% disp(['Sample size of basedband ZigBee signal (after filtering): ', num2str(size(rxSignalCH1))]);
%
% freqShiftOpt = repmat(exp(1i * 2 * pi * -freqShift * (0:size(QAMEmuSignal, 1) - 1))', 1, size(QAMEmuSignal, 2));
% QAMEmuSignal = QAMEmuSignal .* freqShiftOpt;
% QAMEmuSignal = lowpass(QAMEmuSignal, 1.2e6, fsWiFi, 'Steepness', 0.99);
%
% figure;
% showIndx = randi([1 10], 1, 1);
% showTimeStep = (32 * 20 * showIndx + 1):1:(32 * 20 * (showIndx + 2));
% [objZigBeeSignal, txSyms, numPkt] = zigbee_txer(txBits', 20, false);
% subplot(2, 1, 1);
% plot(real(objZigBeeSignal(showTimeStep, 1)), 'DisplayName', 'ideal');
% hold on;
% plot(real(rxSignalCH1(showTimeStep, 1)), 'DisplayName', 'WEBeeCH1');
% hold on;
% plot(real(rxSignalCH2(showTimeStep, 1)), 'DisplayName', 'WEBeeCH2');
% hold on;
% plot(real(QAMEmuSignal(showTimeStep, 1)), 'DisplayName', 'QAM Emualted');
% title('Real part');
% legend('Location', 'best');
% subplot(2, 1, 2);
% plot(imag(objZigBeeSignal(showTimeStep, 1)), 'DisplayName', 'ideal');
% hold on;
% plot(imag(rxSignalCH1(showTimeStep, 1)), 'DisplayName', 'WEBeeCH1');
% hold on;
% plot(imag(rxSignalCH2(showTimeStep, 1)), 'DisplayName', 'WEBeeCH2');
% hold on;
% plot(imag(QAMEmuSignal(showTimeStep, 1)), 'DisplayName', 'QAM Emualted');
% title('Image part');
% legend('Location', 'best');
% hold off;
rx = rxSignalCH1(1:5:end, :);
[bits, rxSyms] = zigbee_rxer(rx, 4, true, numPkt);
symAcurrCH1 = length(find(txSyms == rxSyms));
[~, netFrameCH1] = lrwpan.MACFrameDecoder(bits);
rx = rxSignalCH2(1:5:end, :);
[bits, rxSyms] = zigbee_rxer(rx, 4, true, numPkt);
symAcurrCH2 = length(find(txSyms == rxSyms));
[~, netFrameCH2] = lrwpan.MACFrameDecoder(bits);
rx = QAMEmuSignal(1:5:end, :);
[bits, rxSyms] = zigbee_rxer(rx, 4, true, numPkt);
symAcurrQAMEmu = length(find(txSyms == rxSyms));
[~, netFrameQAMEmu] = lrwpan.MACFrameDecoder(bits);
disp(['symAcurrCH1=', num2str(symAcurrCH1), ' symAcurrCH2=', num2str(symAcurrCH2), ' symAcurrQAMEmu=', num2str(symAcurrQAMEmu)]);
disp(['netFrameCH1=', num2str(netFrameCH1(:)'), ' netFrameCH2=', num2str(netFrameCH2(:)'), ' netFrameQAMEmu=', num2str(netFrameQAMEmu(:)')]);
txBits = randi([0, 1], 1, 10^3);
[rxBits] = w2z_link(txBits, 30, true);
% [rxBits] = fast_w2z_link(txBits, 30, true);
length(find(txBits==rxBits(1:1:length(txBits)))) ./ length(txBits)
% tmp = getEmuSignalMap();