64QAM调制C++程序
时间: 2023-11-14 12:58:43 浏览: 38
以下是一个简单的 64QAM 调制 C++ 程序的示例:
```c++
#include <iostream>
#include <complex>
using namespace std;
const int symbol_map[64][2] = {
{-7, 7}, {-7, 5}, {-7, 1}, {-7, 3},
{-7, -7}, {-7, -5}, {-7, -1}, {-7, -3},
{-5, 7}, {-5, 5}, {-5, 1}, {-5, 3},
{-5, -7}, {-5, -5}, {-5, -1}, {-5, -3},
{-1, 7}, {-1, 5}, {-1, 1}, {-1, 3},
{-1, -7}, {-1, -5}, {-1, -1}, {-1, -3},
{-3, 7}, {-3, 5}, {-3, 1}, {-3, 3},
{-3, -7}, {-3, -5}, {-3, -1}, {-3, -3},
{7, 7}, {7, 5}, {7, 1}, {7, 3},
{7, -7}, {7, -5}, {7, -1}, {7, -3},
{5, 7}, {5, 5}, {5, 1}, {5, 3},
{5, -7}, {5, -5}, {5, -1}, {5, -3},
{1, 7}, {1, 5}, {1, 1}, {1, 3},
{1, -7}, {1, -5}, {1, -1}, {1, -3},
{3, 7}, {3, 5}, {3, 1}, {3, 3},
{3, -7}, {3, -5}, {3, -1}, {3, -3}
};
int main() {
int bit_stream[384]; // 6 bits per symbol, 64 symbols per 384 bits
int symbol_stream[64];
complex<double> modulated_stream[64];
// Generate random bit stream
for(int i = 0; i < 384; i++) {
bit_stream[i] = rand() % 2;
}
// Map 6-bit symbols to 64QAM constellation points
for(int i = 0; i < 64; i++) {
int symbol = 0;
for(int j = 0; j < 6; j++) {
symbol += bit_stream[i * 6 + j] * pow(2, 5 - j);
}
symbol_stream[i] = symbol;
modulated_stream[i].real(symbol_map[symbol][0]);
modulated_stream[i].imag(symbol_map[symbol][1]);
}
// Print the modulated 64QAM symbols
for(int i = 0; i < 64; i++) {
cout << modulated_stream[i] << endl;
}
return 0;
}
```
这个程序使用了一个预定义的 64QAM 映射表,将 6 位的二进制符号映射到 64QAM 星座点。程序随机生成一个 384 位的比特流,将其分为 64 个 6 位符号,并将这些符号映射到 64QAM 星座点。最后,程序输出 64 个复数,表示 64QAM 调制后的信号。