BCH(31,16)、CRC-32与交织码级联的实现及分析

Implementation and Analysis of the Concatenation of BCH(31,16)、CRC-32 and Cross-interleaved Code

在遥测系统的无线传输中为了对突发错误进行检测及纠错,克服单一编码方式检纠错能力有限的缺点,利用BCH(31,16)纠错能力强、CRC-32检错效能高及交织器能将突发性错误转换为随机错误的优点,组成串行级联编码方式,并对其实现原理及方法进行讨论。通过模拟实验对该编码方式进行分析,在每帧数据544位的情况下,对连续错误低于48位的纠错能力达100%,且编码效率高。

In the wireless transmission of telemetry system,a better method for paroxysmal error detection and correction is introduced,which is based on a serial concatenated code,by virtue of the good error correction performance of BCH(31,16)(Bose-Chaudhuri-Hocquenghem),the high error detection capability of CRC-32(Cyclic Redundancy Check),and the transformation capability from paroxysmal error to random error of cross-interleaved transformation.The analysis of simulation test results indicates that this method can correct the error completely on the condition that the number of continuous error bit is less than 48 in a frame of 544 bit.