Add Random PRI

Random PRI/narrow_signal_model.m

@@ -0,0 +1,25 @@
+function [s_T_narrow, A_narrow] = narrow_signal_model(t, betas_narrow)
+    global f_c N_narrow N FIGURE N_wide numP f_s K_chirp T_r;
+
+    tt = 0: 1/f_s: numP * T_r - 1/f_s;
+
+    % 使用等效散射系数生成窄带情况信号模型
+    s_T_narrow = zeros(1, N * numP);
+    for j = 1: numP
+        idx = ((j-1) * N + (1:N_narrow));
+        tp = idx / f_s;
+        s_T_narrow(1, idx) = exp(1j * 2 * pi * (f_c * tp + 0.5 * K_chirp * tp .^ 2));
+    end
+
+    % s_T_narrow = exp(1j .* 2 .* pi .* f_c .* t);
+    s_R_narrows = zeros(N_narrow, N * numP);
+    for i = 1: N_narrow
+        p = i * (N_wide / N_narrow);
+        s_R_narrows(i, :) = betas_narrow * [zeros(1, p), s_T_narrow(1: end-p)];
+    end
+    
+    A_narrow = s_R_narrows';
+    if FIGURE
+        subplot(2, 1, 1); plot(tt, real(s_T_narrow));
+        subplot(2, 1, 2); plot(tt, real(s_R_narrows(1, :)));
+    end