64QAM python实现
时间: 2023-07-17 07:12:26 浏览: 191
要实现64QAM调制方案的Python代码,你可以使用numpy库来进行复杂的数学运算。下面是一个简单的示例代码,演示了如何将二进制数据映射到64QAM符号,并将其解调回二进制数据。
```python
import numpy as np
def qam64_modulation(bits):
# 将输入的二进制数据分割成6位一组
bits = np.reshape(bits, (-1, 6))
# 构建64QAM调制表
qam_table = {
'000000': (-7, 7),
'000001': (-5, 7),
'000010': (-3, 7),
'000011': (-1, 7),
'000100': (1, 7),
'000101': (3, 7),
'000110': (5, 7),
'000111': (7, 7),
'001000': (-7, 5),
'001001': (-5, 5),
'001010': (-3, 5),
'001011': (-1, 5),
'001100': (1, 5),
'001101': (3, 5),
'001110': (5, 5),
'001111': (7, 5),
'010000': (-7, 3),
'010001': (-5, 3),
'010010': (-3, 3),
'010011': (-1, 3),
'010100': (1, 3),
'010101': (3, 3),
'010110': (5, 3),
'010111': (7, 3),
'011000': (-7, 1),
'011001': (-5, 1),
'011010': (-3, 1),
'011011': (-1, 1),
'011100': (1, 1),
'011101': (3, 1),
'011110': (5, 1),
'011111': (7, 1),
'100000': (-7, -1),
'100001': (-5, -1),
'100010': (-3, -1),
'100011': (-1, -1),
'100100': (1, -1),
'100101': (3, -1),
'100110': (5, -1),
'100111': (7, -1),
'101000': (-7, -3),
'101001': (-5, -3),
'101010': (-3, -3),
'101011': (-1, -3),
'101100': (1, -3),
'101101': (3, -3),
'101110': (5, -3),
'101111': (7, -3),
'110000': (-7, -5),
'110001': (-5, -5),
'110010': (-3, -5),
'110011': (-1, -5),
'110100': (1, -5),
'110101': (3, -5),
'110110': (5, -5),
'110111': (7, -5),
'111000': (-7, -7),
'111001': (-5, -7),
'111010': (-3, -7),
'111011': (-1, -7),
'111100': (1, -7),
'111101': (3, -7),
'111110': (5, -7),
'111111': (7, -7)
}
# 根据调制表将二进制数据映射为I/Q信号
symbols = []
for group in bits:
symbol = qam_table[''.join(group)]
symbols.append(symbol)
return np.array(symbols)
def qam64_demodulation(symbols):
# 将输入的I/Q信号映射回二进制数据
bits = []
for symbol in symbols:
for key, value in qam_table.items():
if value == symbol:
bits.extend(list(key))
break
return np.array(bits)
# 测试调制和解调函数
bits = np.random.randint(0, 2, 1000) # 随机生成1000个二进制数据
symbols = qam64_modulation(bits)
bits_demodulated = qam64_demodulation(symbols)
print("原始数据:", bits[:30])
print("调制后的符号:", symbols[:10])
print("解调后的数据:", bits_demodulated[:30])
```
这个代码示例中,我们定义了`qam64_modulation`函数来实现64QAM调制,将输入的二进制数据映射为复数形式的I/Q信号。然后,我们定义了`qam64_demodulation`函数来执行解调操作,将接收到的I/Q信号映射回二进制数据。在代码的最后,我们生成了随机的二进制数据,并测试了调制和解调函数的效果。
请注意,这只是一个简单的示例,实际上,在实际通信系统中,还需要考虑信道噪声、均衡、误码纠正等其他因素。此外,还可以根据需要进行性能优化和改进。