16qam调制解调 python
时间: 2023-08-02 10:11:25 浏览: 377
引用\[1\]:在Python中,可以使用commpy库来实现16QAM调制和解调。首先,需要导入commpy库和numpy库。然后,可以使用commpy库中的QAMModem类来实现16QAM调制。调制的过程是将输入的比特流转换为对应的16QAM符号。具体的实现代码如下所示:
```python
import commpy as cpy
import numpy as np
def modulate_16qam(bits):
qam16 = cpy.QAMModem(16)
symbol = qam16.modulate(bits)
return symbol
```
对于解调,可以使用commpy库中的QAMModem类的demodulate方法来实现。解调的过程是将接收到的信号转换为对应的比特流。具体的实现代码如下所示:
```python
def demodulate_16qam(signal):
qam16 = cpy.QAMModem(16)
bits = qam16.demodulate(signal, 'hard')
return bits
```
引用\[3\]:另外,还可以使用字典来实现16QAM调制和解调。首先,需要定义一个字典来保存16QAM中比特与振幅的对应关系。然后,通过遍历比特流,将每个比特组合转换为对应的复数,从而实现16QAM调制。具体的实现代码如下所示:
```python
import numpy as np
def modulate_16qam(bits):
diagram = {
'00': complex(-3, 3),
'01': complex(-3, 1),
'11': complex(-1, 1),
'10': complex(-1, 3),
'110': complex(-3, -3),
'111': complex(-3, -1),
'101': complex(-1, -1),
'100': complex(-1, -3),
'010': complex(3, 3),
'011': complex(3, 1),
'001': complex(1, 1),
'000': complex(1, 3),
'101': complex(3, -3),
'111': complex(3, -1),
'110': complex(1, -1),
'100': complex(1, -3)
}
symbol = \[\]
for i in range(0, len(bits), 4):
bit_group = bits\[i:i+4\]
symbol.append(diagram\[bit_group\])
return np.array(symbol)
```
对于解调,可以通过查询字典来将接收到的复数转换为对应的比特组合。具体的实现代码如下所示:
```python
def demodulate_16qam(signal):
diagram = {
complex(-3, 3): '00',
complex(-3, 1): '01',
complex(-1, 1): '11',
complex(-1, 3): '10',
complex(-3, -3): '110',
complex(-3, -1): '111',
complex(-1, -1): '101',
complex(-1, -3): '100',
complex(3, 3): '010',
complex(3, 1): '011',
complex(1, 1): '001',
complex(1, 3): '000',
complex(3, -3): '101',
complex(3, -1): '111',
complex(1, -1): '110',
complex(1, -3): '100'
}
bits = \[\]
for s in signal:
bit_group = diagram\[s\]
bits.extend(list(bit_group))
return np.array(bits)
```
以上是两种实现16QAM调制和解调的方法,你可以根据自己的需求选择其中一种来使用。
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