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 +1,87 @@
+clc
+clear
+close all;
+
+SNR = 10;
+sigma_n = 0.1;
+P_fa = [1e-5, 5e-5, 1e-4, 5e-4, 1e-3, 5e-3, 1e-2, 5e-2, 1e-1, 5e-1, 1];
+len_P_fa = length(P_fa);
+
+h0_rep_time = 99 * 1e4;
+h1_rep_time = 1e5;
+% h0_rep_time = 1000;
+% h1_rep_time = 1000;
+
+a = sqrt(10^(SNR/10) * sigma_n^2);
+
+P_fa_node_cnt = zeros(len_P_fa, h0_rep_time);
+
+parfor rep = 1: h0_rep_time
+% for rep = 1: h0_rep_time
+    
+    %% 噪声处理
+    noise = random('Normal', 0, sigma_n/sqrt(2), 1, 1) + 1j * random('Normal', 0, sigma_n/sqrt(2), 1, 1);
+    
+    y = noise;
+    
+    stat = abs(y)^2;
+
+    kd = sigma_n^2 * chi2inv(1 - P_fa, 2) / 2;
+
+    for cnt_h_th = 1: len_P_fa
+        P_fa_node_cnt(cnt_h_th, rep) = stat > kd(cnt_h_th);
+    end
+
+    fprintf('Pfa-%d\n', rep);
+    
+end
+
+P_fa_node = mean(P_fa_node_cnt, 2);
+
+figure(1)
+loglog(P_fa,P_fa_node)
+title('Pfa')
+
+
+
+P_d_node_cnt = zeros(len_P_fa, h1_rep_time);
+
+parfor rep = 1: h1_rep_time
+% for rep = 1: h1_rep_time
+    
+    %% 噪声处理
+    noise = random('Normal', 0, sigma_n/sqrt(2), 1, 1) + 1j * random('Normal', 0, sigma_n/sqrt(2), 1, 1);
+    
+    y = a + noise;
+    
+    stat = abs(y)^2;
+
+    kd = sigma_n^2 * chi2inv(1 - P_fa, 2) / 2;
+
+    for cnt_h_th = 1: len_P_fa
+        P_d_node_cnt(cnt_h_th, rep) = stat > kd(cnt_h_th);
+    end
+
+    fprintf('Pd-%d\n', rep);
+    
+end
+
+P_d_node = mean(P_d_node_cnt, 2);
+
+figure(2)
+loglog(P_fa,P_d_node)
+title('Pd')
+
+figure(3)
+loglog(P_fa_node,P_d_node)
+title('ROC')
+
+save node_detect.mat ...
+    SNR...
+    P_fa...
+    P_fa_node...
+    P_d_node...
+    sigma_n...
+    h0_rep_time...
+    h1_rep_time...
+    a;