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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2272

Title: Analysis of minimum selection GSC in Rayleigh fading
Authors: Gupta, Pranay
Bansal, Nidhi
Mallik, Ranjan K
Keywords: generalized selection combining
signal-to-noise ratio
M-ary phase-shift
Issue Date: 2004
Citation: Communications, IEEE International Conference on, 6, 3364 - 3368p.
Abstract: This paper analyzes the error performance of an improved generalized selection combining (GSC) technique called minimum selection GSC (MS-GSC) in flat Rayleigh fading for coherent digital modulation schemes. Here the minimum number of diversity branches is selected such that their combined signal-to-noise ratio (SNR) is above a given threshold. The threshold chosen here is determined by the combiner output SNR rather than individual branch SNRs as done in absolute threshold GSC (AT-GSC) and normalized threshold GSC (NT-GSC). As a result, MS-GSC uses less resource than AT-GSC or NT-GSC to give the same performance. We obtain a closed-form expression for the distribution of the number of selected branches followed by a closed-form expression for the characteristic function (c.f.) of the combiner output SNR. This c.f. is used to obtain the symbol error probability for different digital modulation schemes. Numerical results for M-ary phase-shift keying are presented as an example.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2272
Appears in Collections:Electrical Engineering

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