It is proved that the PDF of the initial channel LLR message in sum product algorithm satisfies the symmetry condition and the stability is given when the channel is Nakagami fading channel.

• 证明了在Nakagami信道中和积译码算法的信道初始化消息的概率密度函数满足对称性条件，并推导了Nakagami信道的稳定性条件。