ti_mo
104 lines
3.0 KiB
Matlab
104 lines
3.0 KiB
Matlab
addpath("from_matlab_example");
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rxFrame1 = trace1.iq(:);
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rxFrame2 = trace2.iq(:);
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rxFrame3 = trace3.iq(:);
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rxFrame4 = trace4.iq(:);
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beaconFrames1 = extractBeaconFrames(rxFrame1);
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beaconFrames2 = extractBeaconFrames(rxFrame2);
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beaconFrames3 = extractBeaconFrames(rxFrame3);
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beaconFrames4 = extractBeaconFrames(rxFrame4);
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cfgMAC = beaconFrames1(1).MAC_Config;
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mgmt = cfgMAC.ManagementConfig;
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disp(mgmt)
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properties(mgmt)
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printBeaconTable(beaconFrames1);
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printBeaconTable(beaconFrames2);
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printBeaconTable(beaconFrames3);
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printBeaconTable(beaconFrames4);
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function beaconFrames = extractBeaconFrames(rxFrame)
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beaconFrames = struct( ...
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"SSID", {}, ...
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"BSSID", {}, ...
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"Offset", {}, ...
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"MAC_Config", {}, ...
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"Bits", {}, ...
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"SNR_dB", {} ...
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);
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channel_bandwidth = "CBW20"; % 20MHz
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searchOffset = 0;
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index = 1;
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while searchOffset < length(rxFrame)
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oldOffset = searchOffset;
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[bitsData, decParams, searchOffset, res] = recoverOFDMBits(rxFrame, searchOffset);
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if searchOffset <= oldOffset
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searchOffset = oldOffset + 1;
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end
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if isempty(bitsData)
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continue;
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end
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[cfgMAC, ~, decodeStatus] = wlanMPDUDecode(bitsData, SuppressWarnings=true);
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if ~decodeStatus && matches(cfgMAC.FrameType, "Beacon")
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if isempty(cfgMAC.ManagementConfig.SSID)
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ssid = "Hidden";
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else
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ssid = string(cfgMAC.ManagementConfig.SSID);
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end
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if isfield(res, "PacketOffset")
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beaconFrames(index).Offset = res.PacketOffset;
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else
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beaconFrames(index).Offset = oldOffset;
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end
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if isfield(res, "LLTFSNR")
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beaconFrames(index).SNR_dB = res.LLTFSNR;
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else
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beaconFrames(index).SNR_dB = NaN;
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end
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beaconFrames(index).SSID = ssid;
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beaconFrames(index).BSSID = string(cfgMAC.Address3);
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beaconFrames(index).MAC_Config = cfgMAC;
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beaconFrames(index).Bits = bitsData;
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index = index + 1;
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end
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end
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end
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function printBeaconTable(beaconFrames)
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fprintf("\n");
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fprintf("%-20s %-18s %-10s %-8s %-8s %-8s %-12s %-8s %-20s\n", ...
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"SSID", "BSSID", "Interval", "B. ch.", "Op. ch.", "SNR", "Vendor", "Std.", "Rates");
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for i = 1:numel(beaconFrames)
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ssid = string(beaconFrames(i).SSID);
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bssid = string(beaconFrames(i).BSSID);
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interval = string(beaconFrames(i).MAC_Config.ManagementConfig.BeaconInterval);
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snr = sprintf("%.1f", beaconFrames(i).SNR_dB);
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bch = "-";
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opch = "-";
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vendor = "-";
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std = "-";
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rates = "-";
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fprintf("%-20s %-18s %-10s %-8s %-8s %-8s %-12s %-8s %-20s\n", ...
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ssid, bssid, interval, bch, opch, snr, vendor, std, rates);
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end
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fprintf("\n");
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end |