Add Radar simulation

2024-05-09 16:48:41 +08:00
parent c57d8588e3
commit 392f83b068
29 changed files with 409 additions and 56 deletions
@@ -0,0 +1,44 @@
+% https://blog.csdn.net/Xiao_Jie123/article/details/115296169
+
+clc; clear;
+
+global c T_r F_s k lambda
+
+%% 加载数据
+% IF_mat = cell2mat(struct2cell(load('Ego_vehicle.mat','IF_mat')));
+IF_mat = cell2mat(struct2cell(load('Ego_vehicle_ksy.mat','IF_mat')));
+[N, M] = size(IF_mat);
+%% 生成窗
+range_win = hamming(N);  %生成range窗
+doppler_win = hamming(M);  %生成doppler窗
+%% range fft
+for i = 1:1:N
+    temp = IF_mat(i,:) .* range_win';
+    % temp_fft = fftshift(fft(temp,N));
+    temp_fft = fft(temp,N);
+    IF_mat(i,:) = temp_fft;
+end
+%% doppler fft
+for j = 1:1:M
+    temp = IF_mat(:,j) .* doppler_win;
+    temp_fft = fftshift(fft(temp,M));
+    IF_mat(:,j) = temp_fft;
+end
+%% 画图
+figure;
+distance_temp = (-N/2:N/2 - 1) * F_s * c / N / 2 / k;
+% distance_temp = (0:N - 1) * F_s * c / N / 2 / k;
+speed_temp = (-M / 2:M / 2 - 1) * lambda / T_r / M / 2;
+[X,Y] = meshgrid(distance_temp,speed_temp);
+mesh(X,Y,(abs(IF_mat)));
+xlabel('距离(m)');
+ylabel('速度(m/s)');
+zlabel('信号幅值');
+title('2维FFT处理三维视图');
+
+figure;
+speed_temp = -speed_temp;
+imagesc(distance_temp,speed_temp,abs(IF_mat));
+title('距离-多普勒视图');
+xlabel('距离(m)');
+ylabel('速度(m/s)');