Multihop communications with fixed-gain relays over generalized fading channels

George K. Karagiannidis, Dimitris A. Zogas, Nikos C. Sagias, Theodoros A. Tsiftsis, P. Takis Mathiopoulos

Research output: Contribution to conferencePaperpeer-review

31 Citations (Scopus)


Efficient performance bounds for multihop wireless Communications systems with non-regenerative fixed-gain relays operating over non-identical generalized fading channels, are presented. More specifically, the end-to-end signal-to-noise ratio (SNR) is formulated and upper bounded by using the well-known inequality between harmonic and geometric mean of positive random variables. Based on this bound, the moments of the end-to-end SNR for Rayleigh, Nakagami-m, and Rice fading channels, are obtained in simple closed-forms. Furthermore, the outage performance and the average error probability for coherent and non-coherent modulation schemes are also studied using the moment-generating function (MGF) approach. The proposed method for the evaluation of the MGF is based on the Padé approximants theory. Moreover, new expressions are derived for the gain of previously proposed "semi-blind" relays. These expressions are used in numerical and computer simulations examples, to verify the accuracy and to show the tightness of the proposed bounds.

Original languageEnglish
Number of pages5
Publication statusPublished - 2004
EventGLOBECOM'04 - IEEE Global Telecommunications Conference - Dallas, TX, United States
Duration: Nov 29 2004Dec 3 2004


OtherGLOBECOM'04 - IEEE Global Telecommunications Conference
CountryUnited States
CityDallas, TX

ASJC Scopus subject areas

  • Engineering(all)

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