从N元信道出发,讨论了在有干扰情况下对称信道中信息传输的基本模型,并从接收端的角度计算了信道平均互信息量。利用信道的对称性,很容易避开复杂的定义式,找到较为简单的计算途径。这里以一个常见的二元对称信道为例,很容易地得到了二元信道的结果。 Starting from N-channel, the basic model of information transmission in symmetric channel with interference is discussed, and the average amount of mutual information of channel is calculated from the perspective of receiver. The use of channel symmetry, it is easy to avoid the complex definition of the type, find a simple calculation approach. Here, taking a common binary symmetric channel as an example, it is easy to get the result of binary channel.