串行通信系统中一种综合容错技术的研究

Study of Synthetic Error-tolerant Technology in Serial Communication System

数据传送的准确性和连贯性是串行通信系统的重要性能指标,通常采用一定的容错技术,广泛使用的有奇偶校验、CRC校验和海明码校验等,但奇偶校验无法检验出偶数个码元出错,CRC-4校验只能检错2位或纠错1位。通过综合运用奇偶校验和CRC-4校验,提出一种综合容错技术,能够纠错1位和检错2位、检错4位、检错2.7%的3位码元错。

Nicety and continuity of data transfer are important performance indexes in serial communication system, usually certain errortolerant technology is adopted, widely used are parity check, CRC, hamming code check and so on, but parity check can＇ t checkout even code bits error, CRC-4 can only checkout 2 code bits error or correct 1 code bit. By synthesizing the parity check and CRC-4, a synthetic error-tolerant technology which can correct 1 code bit and checkout 2 code bits error, 4 code bits error, 2.7% of all 3 code bits error is presented.