Closed-Form Analysis of Various Diversity Techniques for Multiband OFDM UWB System Over Log-Normal Fading Channels

In this paper, we investigate the effect of multipath fading on the combined signal-to-noise ratio (SNR) in conjunction with multiband orthogonal frequency division multiplexing ultra-wideband system with different diversity schemes such as maximal ratio combining, equal gain combining and selection...

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Bibliographic Details
Published in:Wireless personal communications 2019-12, Vol.109 (3), p.1781-1803
Main Authors: Kondoju, Sai Krishna, Vakamulla, Venkata Mani
Format: Article
Language:English
Subjects:
Bit error rate
Channels
Codes
Communications Engineering
Computer Communication Networks
Engineering
Fading
Networks
Orthogonal Frequency Division Multiplexing
Performance measurement
Probability density functions
Signal to noise ratio
Signal,Image and Speech Processing
Ultrawideband
Wideband communications
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Summary:In this paper, we investigate the effect of multipath fading on the combined signal-to-noise ratio (SNR) in conjunction with multiband orthogonal frequency division multiplexing ultra-wideband system with different diversity schemes such as maximal ratio combining, equal gain combining and selection combining. In particular, we derived the probability density function of the combiner output SNR followed by performance measures, average combined SNR, outage probability and average bit error rate, in the case of L-fold log-normal fading channels. The derived mathematical expressions are illustrated by applying the method to some selected numerical examples of interest showing the impact of fading variance as-well-as a number of diversity paths, which is combined, on the performance metrics of combiner output for above diversity techniques. The results show that the number of diversity paths significantly improve the effect of multipath fading on derived performance measures.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-019-06652-z