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CRC 码称为循环冗余校验码(cyclic re-dundaney check),是一种在数字传输中应用较为广泛的误差检测码,它对于信息数据中出现的误码有较强的检出能力。它根据信息码的内容按一定的生成多项式生成,并附在信息码之后传送。例如,生成多项式是X~3+1,用数码表示就是1001,这时,如果信息码是110000,则用1001除以110000,所得余数为011,这011便是信息码110000的 CRC 码,因此传送的数码便是110000011,该数码有一个性质,即它一定能被1001整除。因此,在接收端可用1001
CRC code called cyclic redundancy check code (cyclic re-dundaney check), is a kind of error detection code which is widely used in digital transmission. It has a strong ability to detect errors in information data. It is based on the contents of the information code generated by a certain generator polynomial, and attached to the information code sent. For example, if the generator polynomial is X ~ 3 + 1 and the number is 1001, in this case, if the information code is 110000, 1001 is divided by 110000 and the remainder is 011, which is the CRC code of information code 110000 The number that is transmitted is 110000011, which has the property that it must be divisible by 1001. However, Therefore, 1001 is available at the receiver