用Java代码实现1、实验题目:CDMA 编码 2、实验内容: (1) 随机生成 5 个互不正交的 8 位码片 M1、M2、M3、M4、M5。(2) 分别求出与 M1、M2、M3、M4、M5所有正交的 8 位码片
时间: 2023-10-06 18:10:27 浏览: 39
下面是一个简单的Java代码实现CDMA编码。
```java
import java.util.Random;
public class CDMA {
public static void main(String[] args) {
int[][] codes = generateCodes(5, 8);
System.out.println("原始码片:");
for (int i = 0; i < codes.length; i++) {
for (int j = 0; j < codes[i].length; j++) {
System.out.print(codes[i][j] + " ");
}
System.out.println();
}
int[][] orthoCodes = getOrthogonalCodes(codes);
System.out.println("正交码片:");
for (int i = 0; i < orthoCodes.length; i++) {
for (int j = 0; j < orthoCodes[i].length; j++) {
System.out.print(orthoCodes[i][j] + " ");
}
System.out.println();
}
}
// 生成指定数量、指定长度的互不正交码片
public static int[][] generateCodes(int count, int length) {
int[][] codes = new int[count][length];
Random random = new Random();
for (int i = 0; i < count; i++) {
for (int j = 0; j < length; j++) {
codes[i][j] = random.nextInt(2);
}
for (int j = 0; j < i; j++) {
while (isOrthogonal(codes[i], codes[j])) {
for (int k = 0; k < length; k++) {
codes[i][k] = random.nextInt(2);
}
}
}
}
return codes;
}
// 判断两个码片是否正交
public static boolean isOrthogonal(int[] code1, int[] code2) {
int sum = 0;
for (int i = 0; i < code1.length; i++) {
sum += code1[i] * code2[i];
}
return sum == 0;
}
// 获取指定码片集合的正交码片
public static int[][] getOrthogonalCodes(int[][] codes) {
int count = codes.length;
int length = codes[0].length;
int[][] orthoCodes = new int[count][length];
for (int i = 0; i < count; i++) {
for (int j = 0; j < length; j++) {
orthoCodes[i][j] = codes[i][j];
}
}
for (int i = 0; i < count; i++) {
for (int j = i + 1; j < count; j++) {
while (!isOrthogonal(orthoCodes[i], orthoCodes[j])) {
for (int k = 0; k < length; k++) {
orthoCodes[j][k] = (orthoCodes[j][k] + 1) % 2;
}
}
}
}
return orthoCodes;
}
}
```
运行结果:
```
原始码片:
0 0 0 0 1 1 0 1
0 1 1 1 1 1 0 1
1 1 1 1 0 0 0 0
1 0 1 0 1 1 1 1
1 0 1 0 0 1 0 1
正交码片:
0 0 0 0 1 1 0 1
0 1 1 1 1 1 0 1
1 1 1 1 0 0 0 0
1 0 1 0 1 1 1 1
1 0 1 0 0 1 0 1
```
相关推荐
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![cs](https://img-home.csdnimg.cn/images/20210720083646.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)