An improved selection cooperation scheme for decode-and-forward relaying

Authors:
He Chen;Ju Liu;Lina Zheng;Chao Zhai;Yong Zhou
Affiliations:
School of Information Science and Engineering, Shandong University, Jinan, China and State Key Lab. of Mobile Communications, Southeast University, Nanjing, China;School of Information Science and Engineering, Shandong University, Jinan, China and State Key Lab. of Mobile Communications, Southeast University, Nanjing, China;School of Information Science and Engineering, Shandong University, Jinan, China and State Key Lab. of Mobile Communications, Southeast University, Nanjing, China;School of Information Science and Engineering, Shandong University, Jinan, China and State Key Lab. of Mobile Communications, Southeast University, Nanjing, China;School of Information Science and Engineering, Shandong University, Jinan, China and State Key Lab. of Mobile Communications, Southeast University, Nanjing, China
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

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.