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在数字通信系统中,为了保证通信的高质量,在信道中采用了各种编码来降低误码率。往往在一个信道中同时采用几个不同的编码,也就是链接编码(又称级链码)的技术,它对降低误码率更为有效,能达到比较高的通信质量。若用一种码来达到同样的误码率,显然难于实现。 本文研究用多项式码、Reed-Solomon码和伪随机码组成的编码信道。对这种链接码扩频信道的性能作了初步分析,并给出了误码率估算的方法。
In digital communication system, in order to ensure the high quality of communication, various codes are adopted in the channel to reduce the bit error rate. Often in a channel using several different coding, which is linked coding (also known as chain-level code) technology, it is more effective in reducing the bit error rate, to achieve higher communication quality. If a code to achieve the same bit error rate, obviously difficult to achieve. In this paper, the coding channel composed of polynomial codes, Reed-Solomon codes and pseudo-random codes is studied. The performance of this code spread spectrum channel is analyzed preliminarily, and the method of bit error rate estimation is given.