An Approach of Relay Ordering to Improve OFDM-Based Cooperation

Pham Ngoc SON  Hyung Yun KONG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E98-B   No.5   pp.870-877
Publication Date: 2015/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.870
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
multi-hop cooperative communication,  OFDM,  decode and forward,  relay ordering,  relay selection,  outage capacity probability,  

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Summary: 
Multi-hop cooperative communication has been investigated in order to overcome disadvantages such as fading, obstruction and low power. In addition, with the goal of increasing access capacity, the orthogonal frequency division multiplexing (OFDM) modulation is being advanced as a solution. In this paper, we propose the approach of relay ordering in a Decode-and-Forward OFDM scheme. Combining techniques such as maximal ratio combining and selection combining are employed at receivers and approximate outage capacity probabilities are derived for evaluating system performance over frequency selective Rayleigh fading channels. Final, the expressions are validated by Monte-Carlo simulations, and are used to compare with the same scheme based relay selection.