实现（7，4）CRC的编码和译码，其中生成多项式可以在程序中改成所需要的。输入4位码，可以编码生成7位循环码。译码的情况限于至多错一位的情形。-To achieve (7,4) cyclic code encoding and decoding, which generate the polynomials can be changed in the program need. Enter 4 yards, you can generate 7-bit cyclic code encoding.

汉明码编码，通过移位寄存器实现系统循环码编码的过程(the simulation platform with systematic cyclic(7,4,3)HAMMING CODE by employing the shift register structure)