lab5 task1 done, task2 nearly finished

2026-06-22 22:03:28 +02:00
parent 48793b1532
commit eb4d72c7c2
16 changed files with 2727 additions and 0 deletions
@@ -0,0 +1,64 @@
+profile = "C";
+bandwidth = 20;
+include_free_space_pathloss = true;
+delay_model = "None";
+carrier_frequency = 2.4e9;
+mobile_speed = 0;
+mobile_altitude = groundStation.Altitude;
+satellite_altitude = satConfig.satAltitude;
+random_stream = "mt19937ar with seed";
+seed = 666;
+tx_antenna_count = 1;
+rx_antenna_count = 1;
+apep = 1000;
+txPower = 20;
+wifiSensitivity = -85;
+reliableRxPower = -75;
+amplifierGain = 30;
+
+[cfgEHT, simParameters, channel, chInfo, maxChDelay, satelliteDopplerShift, chanBW] = create_baseline_configuration(profile, bandwidth, include_free_space_pathloss, delay_model, carrier_frequency, mobile_speed, mobile_altitude, satellite_altitude, random_stream, seed, tx_antenna_count, rx_antenna_count, apep);
+cfgEHT.User{1}.MCS = 3;
+simParameters.TransmitPower = txPower;
+
+[~, numPacketsSimulated, ~, rxPower, pathLoss] = simulateTransmission(accessAnalysisResults, cfgEHT, channel, maxChDelay, [], inf, simParameters);
+
+packetIdx = 1:numPacketsSimulated;
+packetTimes = accessAnalysisResults.times(packetIdx);
+rxPower = rxPower(packetIdx);
+pathLoss = pathLoss(packetIdx);
+
+figure;
+plot(packetTimes, rxPower);
+grid on;
+xlabel("Time");
+ylabel("Power [dBm]");
+title("Receive power over time plot of satellite pass");
+yline(wifiSensitivity, "--", "receive sensitivity -85 dBm");
+yline(reliableRxPower, "--", "reliable reception -75 dBm");
+
+lambda = physconst("lightspeed") / carrier_frequency;
+maxPathLossDetectable = txPower - wifiSensitivity;
+maxDistanceDetectable = lambda / (4 * pi) * 10^(maxPathLossDetectable / 20);
+
+maxPathLossReliable = txPower - reliableRxPower;
+maxDistanceReliable = lambda / (4 * pi) * 10^(maxPathLossReliable / 20);
+
+requiredTxPower = reliableRxPower + pathLoss;
+
+figure;
+plot(packetTimes, requiredTxPower);
+grid on;
+xlabel("Time");
+ylabel("Power [dBm]");
+title("Required transmit power for -75 dBm receive power");
+
+amplifiedTxPower = txPower + amplifierGain;
+requiredAntennaGain = max(requiredTxPower - amplifiedTxPower, 0);
+
+validRequiredTxPower = requiredTxPower(isfinite(requiredTxPower));
+validRequiredAntennaGain = requiredAntennaGain(isfinite(requiredAntennaGain));
+
+fprintf("Maximum detectable distance at %.0f dBm TX power: %.2f km\n", txPower, maxDistanceDetectable / 1e3);
+fprintf("Maximum reliable distance at %.0f dBm TX power: %.2f km\n", txPower, maxDistanceReliable / 1e3);
+fprintf("Required TX power for -75 dBm reception: %.2f dBm to %.2f dBm\n", min(validRequiredTxPower), max(validRequiredTxPower));
+fprintf("Required antenna gain with %.0f dB amplifier: %.2f dB to %.2f dB\n", amplifierGain, min(validRequiredAntennaGain), max(validRequiredAntennaGain));