kdee/miSim
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cache RSS data for efficiency in computing all timestep SINRs

Browse Source
This commit is contained in:
Kevin Dee
2026-04-30 10:25:40 -07:00
parent 35702a6ce2
commit 6349212dd5
3 changed files with 87 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files
@rfSensor/rfSensor.m
+3 -1
View File
@@ -14,11 +14,13 @@ classdef rfSensor
% Values computed at initialization
P_TX_dBm = NaN; % Transmit power (dBm)
N = NaN; % Thermal noise
% Cached state (per timestep)
rssCache (:,1) double = double.empty(0,1); % linear-scale RSS to last target grid
end
methods (Access = public)
[obj] = initialize(obj, txPower, bandwidth, centerFreq, rxGain); % initialize sensor, define parameters
[SINR, SNR] = sensorPerformance(obj, agentPos, targetPos, otherSensorsPos, otherSensors); % determine sensor performance for a given single sensor and target geometry
[SINR, SNR, obj, otherSensors] = sensorPerformance(obj, agentPos, targetPos, otherSensorsPos, otherSensors); % determine sensor performance for a given single sensor and target geometry
[d, t, a] = computePointToPoints(obj, agentPos, targetPos);
[f] = plotParameters(obj); % debug, plot sensor response as a function of distance and tilt angle
[f] = plotPerformance(obj, altitude, otherSensorsPos, otherSensors); % debug, plot SNR or SINR ground heatmap for a given geometry
@rfSensor/sensorPerformance.m
+15 -9
View File
@@ -1,4 +1,4 @@
function [SINR, SNR] = sensorPerformance(obj, agentPos, targetPos, otherSensorsPos, otherSensors)
function [SINR, SNR, obj, otherSensors] = sensorPerformance(obj, agentPos, targetPos, otherSensorsPos, otherSensors)
arguments (Input)
obj (1, 1) {mustBeA(obj, "rfSensor")};
agentPos (1, 3) double;
@@ -9,21 +9,27 @@ function [SINR, SNR] = sensorPerformance(obj, agentPos, targetPos, otherSensorsP
arguments (Output)
SINR (:, 1) double;
SNR (:, 1) double;
obj (1, 1) {mustBeA(obj, "rfSensor")};
otherSensors (:, 1) cell;
end
assert(size(otherSensorsPos, 1) == size(otherSensors, 1), "Mismatch in number of other sensor positions (%d) and number of other sensors (%d) provided", size(otherSensorsPos, 1), size(otherSensors, 1));
[d, t, a] = obj.computePointToPoints(agentPos, targetPos);
% Performance is measured as SINR for this sensor
%% TODO: how should interference calculation be modified for
% interference sources with different center frequencies and bandwidths?
S = 10 .^ (0.1 .* obj.RSS(d, t, a)); % Signal
I = zeros(size(d)); % Interference from other agents
if isempty(obj.rssCache)
obj.rssCache = 10 .^ (0.1 .* obj.RSS(d, t, a));
end
S = obj.rssCache;
I = zeros(size(d));
for ii = 1:size(otherSensors, 1)
[d_other, t_other, a_other] = otherSensors{ii}.computePointToPoints(otherSensorsPos(ii, 1:3), targetPos);
I = I + 10 .^ (0.1 .* otherSensors{ii}.RSS(d_other, t_other, a_other));
if isempty(otherSensors{ii}.rssCache)
[d_other, t_other, a_other] = otherSensors{ii}.computePointToPoints(otherSensorsPos(ii, 1:3), targetPos);
otherSensors{ii}.rssCache = 10 .^ (0.1 .* otherSensors{ii}.RSS(d_other, t_other, a_other));
end
I = I + otherSensors{ii}.rssCache;
end
SINR = 10*log10(S ./ (I + obj.N));
SNR = 10*log10(S ./ obj.N);
end
end