python bch 代码

以下是一个使用Python编写的BCH代码示例：

import random

# 编码函数
def bch_encode(msg, n, k):
    g = [0] * (n - k + 1)
    gen_poly = [int(x) for x in f'{2 ** n - 1:0{n + 1}b}']
    msg_poly = [int(x) for x in f'{msg:0{k}b}']
    encoded_msg_poly = msg_poly + [0] * (n - k)
    
    for i in range(k):
        if encoded_msg_poly[i] != 0:
            for j in range(n - k + 1):
                encoded_msg_poly[i + j] ^= gen_poly[j]
    
    return int(''.join(map(str, encoded_msg_poly)), 2)

# 生成随机消息
msg = random.randint(0, 2 ** 5 - 1)
print("随机消息:", msg)

# BCH编码参数
n = 7  # 编码后的长度
k = 5  # 消息的长度

# 编码消息
encoded_msg = bch_encode(msg, n, k)
print("编码后的消息:", encoded_msg)

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