本文主要介绍线性分组码的编码的基本原理。论述了汉明码及循环码的编、解码原理和方法。简要说明了线性分组码的差错特性；详细分析了（8，4）循环码的编码和解码过程，并设计出了（8，4）循环码的编码电路和解码电路。-This paper describes the linear block code encoding of the basic principles. Discusses the Hamming code and cyclic code encoding and decoding prin

7,4) cyclic code - the channel coding matlab simulation 由matlab实现 比较明了-7,4) cyclic code- the channel coding matlab simulation relatively straightforward to achieve by the matlab

用matlab实现(7,4)系统循环码的编码和译码，g(x)=1+x+x3。 -(7,4) system encoding and decoding of cyclic codes, g (x) = 1+x+x3 using matlab.

basic concept of OFDM is quite simple [4]–[7]. Data is transmitted in parallel on a number of different frequencies, and as a result the symbol period is much longer than for a serial system with the same total data rate. Because the symbol perio