Performance Analysis of Partial Relay Selection with Feedback Delay in the Presence of Interference in Nakagami-m fading channels и♮This work is supported by Qatar National Research Fund (QNRF) grant through National Priority Research Program (NPRP) No. 08–577-2–241. QNRF is an initiative of Qatar Foundation. The work of C. Zhong was supported by the National Natural Science Foundation of China (61201229), the Zhejiang Provincial Natural Science Foundation of China (No. LQ12F01006) and the Fundamental Research Funds for Central Universities (2012QNA5011).
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In this paper, we analyze the performance of a dualhop system with partial relay selection and feedback delay over Nakagami-m fading channels in the presence of multiple identical interferers at the destination. Based on the new closed-form expressions for the cumulative distribution function of the effective signal-to-interference plus noise ratio, we present closed-form expressions for the outage probability and average symbol error rate (SER) for both fixed and CSI-assisted gain relaying systems. To gain further insights, the asymptotic outage probability and average symbol error rates at the high signal to noise ratio regimes are examined. Our results reveal that increasing the number of relays does not provide any extra diversity gain due to the presence of the feedback delay. Specifically, we show that feedback delay as well as CCI only affect the coding gain of the system. The accuracy of the analytical results are supported Monte-Carlo simulations. © 2013 IEEE.
author list (cited authors)
Al-Qahtani, F. S., Zhong, C., Radaydeh, R. M., & Alnuweiri, H.