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An Efficient ZJ-Based Decoding Algorithm for Space-Time Trellis Codes in Slow Rayleigh Fading Channels

机译:慢瑞利衰落信道中空时网格码的基于ZJ的高效解码算法

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摘要

In this paper, we propose a computationally efficient decoding algorithm for space-time trellis codes in slow Rayleigh fading channels. The proposed scheme is based on a stack algorithm with two key ideas: (i) a variable stack size depending upon the signal-to-noise ratio to avoid the exhaustive search of paths and (ii) a normalized metric, which is defined as each cumulative path metric divided by its own length in the stack, to provide an appropriate comparison of the paths with different lengths. Simulation results demonstrate that the proposed algorithm achieves near-ML performance with significant reduction in complexity, compared with the conventional Viterbi algorithm.
机译:在本文中,我们为慢瑞利衰落信道中的时空网格码提出了一种计算有效的解码算法。所提出的方案基于具有两个关键思想的堆栈算法:(i)取决于信噪比的可变堆栈大小,以避免对路径的穷举搜索;(ii)归一化的度量,每个累积路径度量除以堆栈中其自身的长度,可以对不同长度的路径进行适当的比较。仿真结果表明,与传统的Viterbi算法相比,该算法可以达到近ML性能,并且复杂度大大降低。

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