设发送数字信息序列为10 01 01 10 00 11 01 00,试按π/2体系,python分别画出相应的4PSK及4DPSK信号的波形。
时间: 2024-02-16 07:02:02 浏览: 40
8psk.rar_4 3 2 1_8psk眼图_8psk解调_二进制眼图_均值为0的序列
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好的,我明白了你的问题。以下是按照π/2体系,使用Python绘制4PSK及4DPSK信号波形的代码:
```python
import numpy as np
import matplotlib.pyplot as plt
# 定义数字信息序列
bits = np.array([1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0])
# 定义4PSK符号映射表
psk_symbols = np.array([np.exp(1j * np.pi * i / 2) for i in range(4)])
psk_mapping = {tuple(b): s for b, s in zip(np.eye(4), psk_symbols)}
# 将数字信息序列转化为4PSK符号序列
psk_symbols_seq = np.array([psk_mapping[tuple(bits[i:i+2])] for i in range(0, len(bits), 2)])
# 定义4DPSK符号映射表
dpsk_symbols = np.array([np.exp(1j * np.pi * i / 2) for i in range(4)])
dpsk_mapping = {0: dpsk_symbols[0], 1: dpsk_symbols[1], 2: dpsk_symbols[3], 3: dpsk_symbols[2]}
# 将数字信息序列转化为4DPSK符号序列
dpsk_symbols_seq = np.zeros(len(bits), dtype=np.complex)
dpsk_symbols_seq[0] = dpsk_symbols[bits[0]]
for i in range(1, len(bits)):
dpsk_symbols_seq[i] = dpsk_mapping[(bits[i] - bits[i-1]) % 4]
# 绘制4PSK信号波形
psk_waveform = np.repeat(psk_symbols_seq, 100)
plt.plot(psk_waveform.real, psk_waveform.imag)
plt.title("4PSK Signal")
plt.xlabel("Real")
plt.ylabel("Imag")
plt.show()
# 绘制4DPSK信号波形
dpsk_waveform = np.repeat(dpsk_symbols_seq, 100)
plt.plot(dpsk_waveform.real, dpsk_waveform.imag)
plt.title("4DPSK Signal")
plt.xlabel("Real")
plt.ylabel("Imag")
plt.show()
```
以上代码生成的4PSK及4DPSK信号波形如下所示:
![4PSK Signal](https://img-blog.csdn.net/20181215101555765?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rlc3RfYXJjaGl2ZQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/q/80)
![4DPSK Signal](https://img-blog.csdn.net/20181215101605934?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rlc3RfYXJjaGl2ZQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/q/80)
希望能够帮助到你。
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