Impl task1 some part of task2

2026-05-19 21:56:06 +02:00
parent fca31532d1
commit 1561016689
8 changed files with 849 additions and 187 deletions
@@ -0,0 +1,104 @@
+addpath("from_matlab_example");
+
+rxFrame1 = trace1.iq(:);
+rxFrame2 = trace2.iq(:);
+rxFrame3 = trace3.iq(:);
+rxFrame4 = trace4.iq(:);
+
+beaconFrames1 = extractBeaconFrames(rxFrame1);
+beaconFrames2 = extractBeaconFrames(rxFrame2);
+beaconFrames3 = extractBeaconFrames(rxFrame3);
+beaconFrames4 = extractBeaconFrames(rxFrame4);
+
+cfgMAC = beaconFrames1(1).MAC_Config;
+mgmt = cfgMAC.ManagementConfig;
+
+disp(mgmt)
+properties(mgmt)
+
+printBeaconTable(beaconFrames1);
+printBeaconTable(beaconFrames2);
+printBeaconTable(beaconFrames3);
+printBeaconTable(beaconFrames4);
+
+function beaconFrames = extractBeaconFrames(rxFrame)
+    beaconFrames = struct( ...
+                           "SSID", {}, ...
+                           "BSSID", {}, ...
+                           "Offset", {}, ...
+                           "MAC_Config", {}, ...
+                           "Bits", {}, ...
+                           "SNR_dB", {} ...
+                         );
+
+    channel_bandwidth = "CBW20"; % 20MHz
+
+    searchOffset = 0;
+    index = 1;
+
+    while searchOffset < length(rxFrame)
+        oldOffset = searchOffset;
+        [bitsData, decParams, searchOffset, res] = recoverOFDMBits(rxFrame, searchOffset);
+
+        if searchOffset <= oldOffset
+            searchOffset = oldOffset + 1;
+        end
+
+        if isempty(bitsData)
+            continue;
+        end
+    
+        [cfgMAC, ~, decodeStatus] = wlanMPDUDecode(bitsData, SuppressWarnings=true);
+    
+        if ~decodeStatus && matches(cfgMAC.FrameType, "Beacon")
+            if isempty(cfgMAC.ManagementConfig.SSID)
+                ssid = "Hidden";
+            else
+                ssid = string(cfgMAC.ManagementConfig.SSID);
+            end
+
+            if isfield(res, "PacketOffset")
+                beaconFrames(index).Offset = res.PacketOffset;
+            else
+                beaconFrames(index).Offset = oldOffset;
+            end
+
+            if isfield(res, "LLTFSNR")
+                beaconFrames(index).SNR_dB = res.LLTFSNR;
+            else
+                beaconFrames(index).SNR_dB = NaN;
+            end
+
+            beaconFrames(index).SSID = ssid;
+            beaconFrames(index).BSSID = string(cfgMAC.Address3);
+            beaconFrames(index).MAC_Config = cfgMAC;
+            beaconFrames(index).Bits = bitsData;
+
+            index = index + 1;
+        end
+    end
+end
+
+function printBeaconTable(beaconFrames)
+    fprintf("\n");
+    fprintf("%-20s %-18s %-10s %-8s %-8s %-8s %-12s %-8s %-20s\n", ...
+        "SSID", "BSSID", "Interval", "B. ch.", "Op. ch.", "SNR", "Vendor", "Std.", "Rates");
+    
+    for i = 1:numel(beaconFrames)
+        ssid = string(beaconFrames(i).SSID);
+        bssid = string(beaconFrames(i).BSSID);
+        interval = string(beaconFrames(i).MAC_Config.ManagementConfig.BeaconInterval);
+        snr = sprintf("%.1f", beaconFrames(i).SNR_dB);
+    
+        bch = "-";
+        opch = "-";
+        vendor = "-";
+        std = "-";
+        rates = "-";
+    
+        fprintf("%-20s %-18s %-10s %-8s %-8s %-8s %-12s %-8s %-20s\n", ...
+            ssid, bssid, interval, bch, opch, snr, vendor, std, rates);
+    end
+    
+    fprintf("\n");
+end