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http://dx.doi.org/10.7236/JIWIT.2011.11.6.015

Performance Analysis of a Double Opportunistic Cooperative Diversity System with Uniform Power Relay Selection  

Kim, Nam-Soo (청주대학교 전자정보공학부)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.11, no.6, 2011 , pp. 15-21 More about this Journal
Abstract
Cooperative diversity system can be applied to an ad-hoc network for reduction of the power consumption, for expansion of the communication range, and for improving the system performance. In a selection relay cooperative diversity system which selects the maximal SNR(Signal-to-noise ratio) relay for transmitting the source information, the selected strong relay transmits continuously under slow fading channel, consequently it reduces the network lifetime. To overcome this defect, recently the uniform power relay selection has been studied to expand the network life time. We apply the uniform power relay selection to a DOT(Double opportunistic transmit) cooperative system that select the transmit relays, of which the SNR of the transmit relays exceed both of the source-relay and the relay-destination threshold. And the performance of the system is analytically derived. The performance comparisons are made among SC(Selection combining), MRC(Maximal ratio combining), and uniform power relay selection of the cooperative diversity system. We noticed that the performance of the uniform power relay selection is inferior to that of others. It is interpreted that the uniform transmit opportunity to the selected relays for extension of the network lifetime degrades the performance.
Keywords
cooperative; diversity; fading; relay selection; opportunistic;
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Times Cited By KSCI : 1  (Citation Analysis)
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