Closed-form expression for the optimum antennas number of a spread spectrum MIMO system under Rayleigh fading conditions

Authors:
Panagiotis Varzakas
Affiliations:
Department of Electronics, Technological Educational Institute of Lamia, Lamia, Greece
Venue:
ICCOM Proceedings of the 13th WSEAS international conference on Communications
Year:
2009

Citing 7
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Abstract

In this presented work, the problem of selecting the number of antennas for a spread spectrum multiple-input multiple-output (MIMO) cellular system is investigated, in order to maximize the Shannon's channel capacity (estimated in average sense) assigned to each system's user when operating in a Rayleigh fading environment. Then, the spectral efficiency is estimated in terms of the achievable average channel capacity per user, during the operation over a broadcast time-varying link, and leads to a simple novel-closed form expression for the optimum number of transmitting antennas value based on the maximization of the achieved average channel capacity per system's user.