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An Enhanced Denoise-and-Forward Relaying Scheme for Fading Channel With Low Computational Complexity

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3 Author(s)
Anxin Li ; DOCOMO Beijing Commun. Labs. Co., Ltd., Beijing ; Yuan Yan ; Hidetoshi Kayama

Two-way relaying can significantly improve spectrum efficiency of relay network and thus is very promising for future wireless communication systems. Among all the two-way relaying schemes, denoise-and-forward (DNF) is very attractive for its high spectrum efficiency and good performance because noise can be eliminated at relay station by the "special denoising signal processing". However, currently DNF can only be applied to low modulation order in fading channels. In this letter, an enhanced DNF scheme is proposed, which extends DNF to high modulation order for fading channels with low computational complexity. Simulation results show the proposed scheme can achieve higher spectrum efficiency than existing schemes.

Published in:

Signal Processing Letters, IEEE  (Volume:15 )