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将纠错编码技术应用于移动信道中,以改善由于信道快衰落造成的长突发误码,提高通信的可靠性的研究工作近年来已取得了许多进展。部分常用分组码在移动信道中的性能估计与计算机模拟工作也已完成。但这些码在一定“突发密度”下的纠突发能力是个有待深入研究的问题。本文根据典型移动信道的长突发误码特征,讨论了几种常用分组码在不同突发密度指标△_0下的纠突发错误能力,并给出了它们的计算机模拟结果。
In recent years, much progress has been made in applying error correction coding technology to mobile channels to improve the long burst error caused by fast fading channels and to improve the reliability of communications. Performance estimation and computer simulation of some commonly used block codes in mobile channels have also been completed. However, the correctness and abilities of these codes under certain “burst density” are issues that need further study. In this paper, based on the characteristics of the long burst error of typical mobile channel, the error-correcting capabilities of several common block codes under different burst density indices Δ_0 are discussed and their computer simulation results are given.