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Multi-Hop Wireless Relaying Systems in the Presence of Co-channel Interferences: Performance Analysis and Design Optimization

Lookup NU author(s): Dr Salama Ikki

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Abstract

A study of the effect of cochannel interference on the performance of multihop wireless networks with amplify-and-forward (AF) relaying is presented. Considering that transmissions are performed over Rayleigh fading channels, first, the exact end-to-end signal-to-interference-plus-noise ratio (SINR) of the communication system is formulated and upper bounded. Then, the cumulative distribution function (cdf) and probability density function (pdf) of the upper bounded end-to-end SINR are determined. Based on those results, closed-form expression for the error probability is obtained. Furthermore, an approximate expression for the pdf of the instantaneous end-to-end SINR is derived, and based on this, a simple and general asymptotic expression for the error probability is presented and discussed. In addition, the ergodic capacity of multihop wireless networks in the presence of external interference is studied. Moreover, analytical comparisons between AF and decode-and-forward (DP) multihop in terms of error probability and ergodic capacity are presented. Finally, optimization of the power allocation at the network's transmit nodes and the positioning of the relays are addressed.

Publication metadata

Author(s): Ikki S, Aissa S

Publication type: Article

Publication status: Published

Journal: IEEE Transaction on Vehicular Technology

Year: 2012

Volume: 61

Issue: 2

Pages: 566-573

Print publication date: 15/12/2011

ISSN (print): 0018-9545

ISSN (electronic): 1939-9359

Publisher: IEEE

URL: http://dx.doi.org/10.1109/TVT.2011.2179818

DOI: 10.1109/TVT.2011.2179818

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