matlab调制2PSK信号并解调
时间: 2023-10-22 09:09:11 浏览: 168
在MATLAB中,可以使用comm.PSKModulator和comm.PSKDemodulator对象来实现2PSK信号的调制和解调。具体步骤如下:
1. 生成随机的二进制比特流
```
bits = randi([0 1], 1000, 1);
```
2. 将二进制比特流转换为符号序列
```
symbols = 2*bits-1;
```
3. 使用comm.PSKModulator对象进行2PSK调制
```
pskMod = comm.PSKModulator(2);
modSignal = pskMod(symbols);
```
4. 添加噪声
```
noisySignal = awgn(modSignal, 10);
```
5. 使用comm.PSKDemodulator对象进行2PSK解调
```
pskDemod = comm.PSKDemodulator(2);demodBits = pskDemod(noisySignal);
```
6. 将解调后的符号序列转换为二进制比特流
```
demodBits(demodBits == -1) = 0;
```
完整代码如下:
```
bits = randi([0 1], 1000, 1);
symbols = 2*bits-1;pskMod = comm.PSKModulator(2);
modSignal = pskMod(symbols);
noisySignal = awgn(modSignal, 10);
pskDemod = comm.PSKDemodulator(2);
demodBits = pskDemod(noisySignal);
demodBits(demodBits == -1) = 0;
```
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