循环码最大的特点就是码字的循环特性，所谓循环特性是指：循环码中任一许用码组经过循环移位后，所得到的码组仍然是许用码组，也就是说，不论是左移还是右移，也不论移多少位，仍然是许用的循环码组.

译码过程 第一步：由接收码字  Rx与监督矩阵相乘得出错误图样S； 第二步：判断S是否为零。若不为零，则出错。在假定至多只有一位错的情况下，可以有效地译出相应的信息码字。 第三步：在出错的情况下，将S与标准监督矩阵对比，得出错误的比特位并进行更正得出前四位为信息码字。-Ring Code biggest feature is the cycle characteristics of code words, the so-called cycle characteristics means: a cyclic code in any code group after the allowable cyclic shift, the resulting code group is still permissible code group, that is, whether It is left or right, regardless of the number of shift bits still set cyclic code with Xu.

The first step in the decoding process:　the received codeword   Rx and monitoring matrix obtained by multiplying the error pattern S　Step two: Analyzing S is zero. If zero, the error. Under the assumption that at most only one wrong circumstances, can be effectively translated to the corresponding information code word. The third step: in case of an error, the S criteria for comparing and monitoring matrix draw the wrong bit and make corrections to information obtained first four codewords.