Optimization of Power Allocation and Relay Position in Multihop Relay Networks Over Generalized Fading Channels

PROJECT TITLE :

Optimization of Power Allocation and Relay Position in Multihop Relay Networks Over Generalized Fading Channels

ABSTRACT:

This paper addresses optimizations of each power allocation (PA) and relay position (RP), PA-only, and RP-solely in multihop relay networks underneath a generalized model of fading channels. By adopting a parameterized model of fading distributions within the high-signal-to-noise-ratio region, we formulate the optimization issues in an exceedingly unified framework, that are applicable to most of fading channels and solved with the Lagrange multiplier method. The optimal solutions are derived in explicit forms that facilitate the analysis on the performance of multihop networks. The analysis shows that the range order of the tip-to-end performance is governed by the hop with the maximum diversity order within the cases of the joint optimization of PA and RP and optimization of RP-only while it is governed by the hop with the minimum diversity order in the case of the optimization of PA-solely. Henceforth, the optimization of RP, improving each the diversity order and coding gain, leverages the system performance additional considerably than that of PA, improving only the coding gain. By improving the diversity order and coding gain simultaneously, the joint optimization of RP and PA shows the best performance.

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