Performance of Adaptive Link Selection With Buffer-Aided Relays in Underlay Cognitive Networks
Open Access
- 11 October 2017
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Vehicular Technology
- Vol. 67 (2) , 1492-1509
Abstract
In this paper, we investigate the performance of a three-node dual-hop cognitive radio network with a half-duplex decode-and-forward buffer-aided relay. We derive expressions for the average rate and symbol error rate (SER) performance of an adaptive link selection based channel-aware buffer-aided relay scheme that imposes peak-power and peak-interference constraints on the secondary nodes, and compare them with those of conventional non-buffer-aided relay and conventional buffer-aided relay schemes for a delay-tolerant system. For a finite-sized buffer, we analyze the performance of a modified threshold-based scheme for fixed-rate transmission. We analyze the tradeoffs between the delay, throughput, and SER. Computer simulation results are presented to demonstrate accuracy of the derived expressions.Keywords
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Funding Information
- Information Technology Research Academy (ITRA/15(63)/Mobile/MBSSCRN/01)
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