Accurate Performance Approximations for MRC over Log-Normal Fading Channels

Average channel capacity (ACC) and average symbol error probability (ASEP) are key metrics for evaluating wireless communication reliability under fading. This paper derives simple, low-complexity approximations for ASEP and ACC for maximal-ratio combining (MRC) receivers subject to log-normal (LN)...

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Bibliographic Details
Published inIEEE communications letters p. 1
Main Authors Mouchtak, Yassine, Bouanani, Faissal El
Format Journal Article
LanguageEnglish
Published IEEE 2025
Subjects
Accuracy
Average Symbol Error Probability
Channel capacity
Diversity reception
Diversity techniques
Fading channels
LN’s PDF transforms
Log-Normal Fading
Modulation
Probability density function
Receivers
Runtime
Signal to noise ratio
Symbols
Wireless communication
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ISSN1089-7798
1558-2558
DOI10.1109/LCOMM.2025.3609908

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Summary:Average channel capacity (ACC) and average symbol error probability (ASEP) are key metrics for evaluating wireless communication reliability under fading. This paper derives simple, low-complexity approximations for ASEP and ACC for maximal-ratio combining (MRC) receivers subject to log-normal (LN) fading, using a second-order Taylor series expansion of LN probability density function transforms. An asymptotic expression for ACC in the high-SNR regime is also provided. Numerical results show close agreement with exact solutions, while runtime comparisons demonstrate significantly reduced computational complexity compared to existing methods, making the proposed framework suitable for ultra-low latency wireless systems.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2025.3609908