M = 10; % MTI中的通道数 window = ones(1, M)/M; % 移动平均窗口 signal_mti = zeros(size(compressed_signal1)); % 初始化MTI信号 for i = M+1:length(compressed_signal1) xmti1(i) = abs(sum(compressed_signal1(i-M:i).*window)); % 对每个时刻的信号进行移动平均 end矩阵维度不一致怎么修改代码
时间: 2024-02-17 19:03:46 浏览: 28
这段代码中,变量 `signal_mti` 的维度与其他变量的维度不一致,需要将其修改为与 `xmti1` 的维度相同。
修改后的代码如下:
```
M = 10; % MTI中的通道数
window = ones(1, M)/M; % 移动平均窗口
xmti1 = zeros(size(compressed_signal1)); % 初始化MTI信号
for i = M+1:length(compressed_signal1)
xmti1(i) = abs(sum(compressed_signal1(i-M:i).*window)); % 对每个时刻的信号进行移动平均
end
```
这里将变量名 `signal_mti` 修改为 `xmti1`,并将其初始化为与 `compressed_signal1` 相同大小的全零矩阵,保证了 `xmti1` 与其他变量的维度相同。
相关问题
window_len = 64; % 窗口长度 N_guard = 16; % 保护间隔 N_train = 32; % 训练窗口长度 threshold = 3; % 判决门限 [range_indices, doppler_indices] = cfardetect(echo_mti, window_len, ... N_guard, N_train, threshold); range = range_indices * c / (2*fs) * lambda / 2; % 目标距离 doppler = (doppler_indices - n/2 - 1) * fs / n; % 目标多普勒频移中的cfardetect的代码是什么
cfardetect的代码如下:
```
function [range_indices, doppler_indices] = cfardetect(echo_mti, window_len, N_guard, N_train, threshold)
[n, m] = size(echo_mti);
RDM = zeros(n - N_guard - N_train + 1, m - window_len + 1);
for i = 1:n - N_guard - N_train + 1
for j = 1:m - window_len + 1
train = echo_mti(i:i+N_train-1, j:j+window_len-1);
train_fft = fft(train, [], 2);
train_pow = abs(train_fft).^2;
guard = echo_mti(i+N_train+N_guard:i+N_train+N_guard+N_train-1, j:j+window_len-1);
guard_fft = fft(guard, [], 2);
guard_pow = abs(guard_fft).^2;
threshold_pow = threshold * mean(guard_pow, 1);
RDM(i, j) = max(max(train_pow, [], 1) - threshold_pow);
end
end
[doppler_indices, range_indices] = find(RDM);
end
```
其中,echo_mti是经过MTI(移动目标指示)处理后的回波信号,window_len是窗口长度,N_guard是保护间隔,N_train是训练窗口长度,threshold是判决门限。函数的输出是range_indices和doppler_indices,分别对应目标距离和多普勒频移的索引值。
将以下MATLAB语言改为C语言 function ClutterProcessGain = CalculateClutterProcessGain(MTI_Length,MTD_Length,delt_t,PRF) %计算杂波的信号处理增益 %delt_t:杂波频率的均方根 % MTI_Length:MTI的长度,一般是1~3 % MTD_Length:MTD的长度,一般是128、256、512、1024 % PRF:重频 %AllCopyRight @Sakary_Pang %2017 05 19 %Version 0 MTI_Gain = 1.0; for i = 1:MTI_Length MTI_Gain = MTI_Gain*(2*i - 1)*(2*pi*delt_t/PRF).^(2*i); end MTD_Gain = MTD_Length; ClutterProcessGain = -10*log10(MTI_Gain) + 10*log10(MTD_Gain);%负号是指MTI使得杂波能量降低
以下是将MATLAB语言改为C语言的代码:
```c
#include <stdio.h>
#include <math.h>
double CalculateClutterProcessGain(int MTI_Length, int MTD_Length, double delt_t, double PRF) {
double MTI_Gain = 1.0;
int i;
for (i = 1; i <= MTI_Length; i++) {
MTI_Gain = MTI_Gain * (2 * i - 1) * pow((2 * M_PI * delt_t / PRF), (2 * i));
}
double MTD_Gain = (double) MTD_Length;
double ClutterProcessGain = -10 * log10(MTI_Gain) + 10 * log10(MTD_Gain);
return ClutterProcessGain;
}
int main() {
int MTI_Length = 0;
int MTD_Length = 0;
double delt_t = 0.0;
double PRF = 0.0;
double ClutterProcessGain = 0.0;
// 输入参数值
printf("请输入MTI_Length的值:");
scanf("%d", &MTI_Length);
printf("请输入MTD_Length的值:");
scanf("%d", &MTD_Length);
printf("请输入delt_t的值:");
scanf("%lf", &delt_t);
printf("请输入PRF的值:");
scanf("%lf", &PRF);
// 调用函数计算ClutterProcessGain
ClutterProcessGain = CalculateClutterProcessGain(MTI_Length, MTD_Length, delt_t, PRF);
printf("ClutterProcessGain的值为:%lf\n", ClutterProcessGain);
return 0;
}
```
你可以使用上述的C代码来实现MATLAB中的`CalculateClutterProcessGain`函数。在C代码中,我们使用`pow`函数来计算幂次。同时,我们也添加了一个`main`函数,以便从用户输入获取参数值并计算`ClutterProcessGain`。最后,将`ClutterProcessGain`的值打印出来。
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