Add Example

2024-11-11 16:32:53 +08:00
parent a2cb6d1825
commit 29ae9585f9
56 changed files with 4029 additions and 0 deletions
@@ -0,0 +1,38 @@
+% echo_r_mtx: range processing echo data
+% sigma_n: input noise standard deviation
+% gamma: compressed ratio
+
+% echo_rd_mtx: range-doppler processing echo data
+% stat_RD: range-doppler statistics
+
+
+function [ echo_rd_mtx, stat_RD ] = doppler_process_MF(echo_r_mtx, sigma_n, gamma)
+
+    % parameters
+    if nargin < 3
+        gamma = 0.5;
+    end
+    [lenA, lenR, M] = size(echo_r_mtx);
+    N = round(M / gamma);
+    
+    % generate mtx
+    F_ori = dftmtx(N);
+    F = F_ori(1:M,:);
+    multiple_d = F(:,1)' * F(:,1);
+    
+    % doppler matched filtering
+    echo_rd_mtx = zeros(lenA, lenR, N);
+    for numA = 1: lenA
+        for numR = 1: lenR
+            sample = squeeze(echo_r_mtx(numA, numR, :));
+            dpl_temp = transpose(F) * sample;
+            dpl_norm = fftshift(dpl_temp ./ multiple_d);
+            echo_rd_mtx(numA, numR, :) = dpl_norm;
+        end
+    end
+    
+    % calculate output noise
+    sigma_n_o = sqrt(sigma_n^2 / multiple_d);
+    stat_RD = abs(echo_rd_mtx ./ sigma_n_o).^2;
+    
+end