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首页> 外文期刊>The mediterranean journal of electronics and communications >MULTI-LEVEL QUADRATURE AMPLITUDE MODULATION UNDER TRIPLE SELECTION DIVERSITY OVER EXPONENTIAL CORRELATED NAKAGAMI-m FADING ENVIRONMENT
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MULTI-LEVEL QUADRATURE AMPLITUDE MODULATION UNDER TRIPLE SELECTION DIVERSITY OVER EXPONENTIAL CORRELATED NAKAGAMI-m FADING ENVIRONMENT

机译：指数相关的Nakagami-m衰落环境下三重选择多样性下的多级正交幅度调制

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摘要

In this paper, closed form expressions for bit error rate (BER) performance of coherent square detection of uncoded and coded M-ary quadrature amplitude modulation under triple selection diversity is obtained and analyzed. The fading channels are modeled as frequency non-selective slow exponentially correlated Nakagami-m fading channels corrupted by additive white Gaussian noise (AWGN). The results for coded MQAM are computed numerically for the case of (24,12) extended Golay code and arc compared with uncodcd MQAM, under triple selection diversity. It has been done by plotting error probabilities versus average signal to noise ratio (SNR) for various values of Nakagami fading parameter m, number of distinct symbols M and branch correlation coefficient ρ in order to examine the effects of fading severity and branch correlation on the performance of MQAM. The results presented in this paper are sufficiently simple and therefore can be computed numerically without any approximations. Also the results presented are general enough to include Rayleigh fading and AWGN as special cases. The analytical results presented in this paper may provide useful information for the design and analysis of digital communication systems over wireless fading channels.
机译：本文获得并分析了三重选择分集下未编码和已编码的M进制正交幅度调制的相干平方检测的误码率（BER）性能的闭合形式表达式。衰落信道被建模为被加性高斯白噪声（AWGN）破坏的频率非选择性慢指数相关Nakagami-m衰落信道。在三重选择分集下，对于（24,12）扩展的Golay码和弧度与未编码的MQAM相比，对MQAM的编码结果进行了数值计算。通过检查Nakagami衰落参数m，不同符号数M和分支相关系数ρ的各种值的错误概率与平均信噪比（SNR）的关系图，可以检查衰落的严重程度和分支相关性对信号强度的影响。 MQAM的性能。本文介绍的结果足够简单，因此可以在不进行任何近似的情况下进行数值计算。给出的结果也足够通用，可以将瑞利衰落和AWGN包括在内。本文介绍的分析结果可为无线衰落信道上的数字通信系统的设计和分析提供有用的信息。

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