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An Improved Selection Cooperation Scheme for Decode-and-Forward Relaying

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5 Author(s)
He Chen ; School of Information Science and Engineering, Shandong University, Jinan, 250100, China, and the State Key Lab. of Mobile Communications, Southeast University, 210096, Nanjing, China ; Ju Liu ; Lina Zheng ; Chao Zhai
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In this letter, an improved selection cooperation (ISC) scheme for decode-and-forward relaying is proposed based on selection cooperation (SC) strategy. Assuming that channels suffer from independent non-identical Rayleigh fading, we derive closed-form expression for the exact symbol error rate (SER) of ISC scheme. The result holds for arbitrary number of relays and refers to both M-PSK and M-QAM modulations. Simulations are carried out to validate the theoretical analysis. Results show that the proposed ISC scheme outperforms SC for all the cases we investigate.

Published in:

IEEE Communications Letters  (Volume:14 ,  Issue: 12 )