摘要
研究了非高斯脉冲信道上的分组马尔可夫叠加传输机制。基于精灵辅助等效系统,分析了分组马尔可夫叠加传输系统的性能下界。仿真结果表明,在特征因子不同的非高斯脉冲信道上,分组马尔可夫叠加编码技术均可获得较高的编码增益,且误比特率较低区域的误码性能均可与精灵辅助下界贴合。在BER=10-5时,分组马可夫叠加传输系统便可达到距离香农限约0.85 dB的性能。
Block Markov superposition transmission scheme was used over channels with symmetric alpha-stable(SαS)impulsive noise. Based on the equivalent genie-aided system, the lower bound of the block Markov superposition transmission system was analyzed. Numerical simulations over non-Gaussian impulsive channels with different characteristic exponents show that, in the low bit-error rate region, performance of the block Markov superposition transmission system matches well with the lower bound. Block Markov superposition transmission scheme performs well(with 0.85 d B away from Shannon limits at the BER of 10-5) over non-Gaussian impulsive channels.
引文
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