Computer Science ›› 2017, Vol. 44 ›› Issue (Z6): 284-287.doi: 10.11896/j.issn.1002-137X.2017.6A.065

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New Physical Layer Network Coding Denoising Mapping Algorithm Based on MQAM

LU Ming-yue, GUO Dao-xing and NIU He-hao   

  • Online:2017-12-01 Published:2018-12-01

Abstract: To overcome the problem of constellation points ambiguity in physical layer network coding(PLNC ),this paper proposed a new QAM-based PLNC de-noising mapping scheme.In this scheme,the relay node rearranges the M-QAM constellation mapping,and merges the points of constellation according to a certain rule.Comparing with traditional scheme,this design reduces the number of constellation points nearly a half,which increases the Euclidean distance between adjacent points in the constellation,thus improves the BER performance.In addition,the relay node only needs demodulation-remapping-modulation,which significantly reduces the processing complexity.Simulation results show the effectiveness of our scheme.

Key words: Quadrature amplitude modulation,Physical layer network coding,Bit error rate,Complexity

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