Equal gain combining over Nakagami-n (rice) and Nakagami-q (Hoyt) generalized fading channels

Authors:
D. A. Zogas;G. K. Karagiannidis;S. A. Kotsopoulos
Affiliations:
Electr. & Comput. Eng. Dept., Univ. of Patras, Achaia, Greece;-;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2005

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Abstract

Motivated by the importance of Nakagami-n (Rice) and Nakagami-q (Hoyt) statistical models to describe channel fading in land, mobile, terrestrial, and satellite telecommunications, we present an alternative moments-based approach to the performance analysis of equal-gain combining (EGC) receivers over independent, not necessarily identically distributed Rice- and Hoyt-fading channels. Exact closed-form expressions for the moments of the signal-to-noise ratio (SNR) at the output of the combiner are derived and significant performance criteria such as, the average output SNR, the amount of fading and the spectral efficiency at the low power regime, are studied. Moreover, using Pade rational approximation to the moment-generating function of the output SNR, the average symbol error probability and the outage probability are evaluated. We also study the suitability of modeling a Hoyt-fading environment by a properly chosen Nakagami-m model, as far as the error performance of the EGC is concerned.