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Performance of Adaptive MQAM with Space-time Coding over Nakagami Fading Channel

机译：Nakagami衰落通道时空编码的自适应MQAM性能

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摘要

The performance analysis of multiple antenna systems with adaptive MQAM and space-time coding over flat Nakagami-m fading channels is presented in this paper. The fading gain value is partitioned into a number of regions by which the modulation is adapted according to the region the fading gain falls in. The fading gain region boundaries for attaining maximum spectrum efficiency subject to the target bit error rate (BER) and fixed power constraint are derived. The probability density function of fading gain is given. Based on these results and mathematical calculation, an exact closed-form expression for the SE is obtained. Meanwhile, exact BER and tightly approximate closed-form BER expressions are derived for integer and non-integer m, respectively. Simulation results for SE and BER are in good agreement with the theoretical analysis.
机译：本文介绍了具有自适应MQAM的多天线系统的性能分析和在扁平的Nakagami-M褪色通道上编码。衰落增益值被划分为许多区域，通过该区域，根据衰落增益落入的区域进行调整。衰落增益区域边界用于获得目标塔错误率（BER）和固定功率的最大频谱效率派生约束。给出了衰落增益的概率密度函数。基于这些结果和数学计算，获得了SE的精确闭合表达。同时，为整数和非整数M导出精确的BER和紧密近似的闭合闭合表达式。 SE和BER的仿真结果与理论分析一致。

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