ABSTRACT Composite fading models have been considered as the suitable fading models for scenarios such as indoor communication and free space optical. Most of the composite fading models are based on Nakagami-m fading distribution in which amount of fading parameter ranges from 0.5 (most severe fading) to infinity (no fading). However, using the McKay–Meijer G function, one of the recent article presents McKay shadowed fading distribution which shows that the fading severity may have values more than that of the most severe case of Nakagami-m fading. In this paper, using the conditional unified expression for conditional bit error rate (BER), a unified expression of the average bit error rate (ABER) over McKay–Meijer G shadowed fading model has been proposed. The proposed unified expression includes the ABER of almost all the modulation schemes. In addition, expression for ABER of binary phase shift keying modulation over McKay fading channel under generalised Gaussian distribution has been derived. Finally, analytical expressions of adaptive capacity under different adaptive schemes namely, COPRA, CORA, CCIFR and truncated CIFR have been presented. Through numerical analysis, different results have been compared with similar results available in the literature.

中文翻译：

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Mckay-Meijer G 阴影衰落信道的统一性能分析

摘要 复合衰落模型被认为是适用于室内通信和自由空间光等场景的衰落模型。大多数复合衰落模型基于 Nakagami-m 衰落分布，其中衰落参数的数量范围从 0.5（最严重的衰落）到无穷大（无衰落）。然而，使用 McKay-Meijer G 函数，最近的一篇文章提出了 McKay 阴影衰落分布，这表明衰落严重程度可能比最严重的 Nakagami-m 衰落情况具有更大的值。在本文中，使用条件误码率（BER）的条件统一表达式，在McKay-Meijer G阴影衰落模型上提出了平均误码率（ABER）的统一表达式。提议的统一表达式包括几乎所有调制方案的 ABER。此外，推导了广义高斯分布下McKay衰落信道上二进制相移键控调制的ABER表达式。最后，给出了不同自适应方案下自适应能力的解析表达式，即COPRA、CORA、CCIFR和截断CIFR。通过数值分析，将不同的结果与文献中的类似结果进行了比较。