Error statistics in data transmission over fading channels
Error statistics in data transmission over fading channels
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DOI：
10.1109/26.729391
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发表时间：
1998-11-01
影响因子：
8.3
通讯作者：
Milstein, LB
中科院分区：
文献类型：
--
作者：
Zorzi, M;Rao, RR;Milstein, LB
本文研究了衰落信道中数据传输中出现的块差错行为。我们的方法考虑了特定编码/调制方案的细节，并逐符号地跟踪衰落过程。结果表明，块误差过程的马尔可夫近似(对于足够快的衰落可能退化为同分布(I.I.D.)过程)是一个在较宽参数范围内很好的模型。此外，可以观察到，边际差错率和转移概率之间的关系在很大程度上对诸如块长度、前向纠错程度和调制格式的参数不敏感，并且基本上依赖于适当归一化版本的多普勒频率。因此，这种关系可以在阈值模型的简单情况下计算，然后更普遍地用作准确的近似值。这一观察结果导致了用于信道建模的统一方法，并简化了上层协议的性能分析。
In this paper, we investigate the behavior of block errors which arise in data transmission on fading channels. Our approach takes into account the details of the specific coding/modulation scheme and tracks the fading process symbol by symbol. It is shown that a Markov approximation for the block error process (possibly degenerating into an identically distributed (i.i.d,) process for sufficiently fast fading) is a good model fur a broad range of parameters. Also, it is observed that the relationship between the marginal error rate and the transition probability is largely insensitive to parameters such as block length, degree of forward error correction and modulation format, and depends essentially on an appropriately normalized version of the Doppler frequency. This relationship can therefore be computed in the simple case of a threshold model and then used more generally as an accurate approximation. This observation leads to a unified approach for the channel modeling, and to a simplified performance analysis of upper lager protocols.