Add experiment

2024-05-09 16:48:29 +08:00
parent 06b3aa1a6d
commit d7b4d9beb2
7 changed files with 173 additions and 0 deletions
@@ -0,0 +1,39 @@
+clc; clear;
+
+configure_parameters;
+global s_T s_R c
+
+% 频域上的匹配滤波
+s_T_fft = fft(s_T);
+s_R_fft = fft(s_R);
+s_R_fft_conj = conj(s_R_fft);
+
+matched_filter = ifft(s_T_fft .* s_R_fft_conj);
+[~, peak] = max(matched_filter);
+t_delay = 1 - peak / length(matched_filter);
+d = (c * t_delay) / 2;
+
+fprintf("r = %f, predict d = %f\n", r_0, d);
+fprintf("eps = %f\n", abs(r_0 - d));
+
+figure(1);
+subplot(311);
+plot(freqs, abs(s_T_fft));
+title("Chirp signal");
+subplot(312);
+plot(freqs, abs(s_R_fft));
+title("Received Chirp signal");
+subplot(313);
+plot(freqs, abs(s_T_fft .* s_R_fft_conj));
+title("Matcher filter");
+
+figure(2);
+subplot(311);
+plot(t, s_T);
+title("Chirp signal");
+subplot(312);
+plot(t, s_R);
+title("Received Chirp signal");
+subplot(313);
+plot(t, matched_filter);
+title("After matched filter");