论文部分内容阅读
（４８，４０）循环码是电力运动系统中最常用的一种抗干扰码，利用该码进行编译码时，一般使用软件查表法，这种方法具有占用内存少、编译码速度快等特点，但是这种算法只能检错，不能纠错，实际上是一种检错编译码算法。本文针对数传信道差错控制的需要，对这种算法进行了改进，经实际使用证明，改进后的算法在保留原算法占用内存开销少、编译码速度快等特点的基础上，纠错能力得到很大提高，在不增加任何硬件设备的条件下，能纠码字内一个长度为８的突发干扰，或一个码字内８个随机错误的一些特定的组合形式。
(48,40) Cyclic code is the most commonly used anti-jamming code in the power system. When using this code to compile and decode code, it usually uses the software look-up table method. This method has the characteristics of less occupied memory and fast codec However, this algorithm can only detect errors, can not correct errors, in fact, is a kind of error-checking coding and decoding algorithm. According to the need of digital channel error control, this algorithm is improved. The practical application proves that the improved algorithm has the advantages of less memory overhead and fast codec, Greatly improved, capable of puncturing a burst of length 8, or some specific combination of eight random errors in a codeword, without adding any hardware equipment.