Optimal power allocation for two-way relaying over OFDM using physical-layer network coding |
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| Authors: | LI Fu-nian ZHU Guang-xi WANG De-sheng |
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| Affiliation: | 1. Department of Electronic and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Electronic and Information Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
2. Department of Electronic and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | In this paper,a network scenario of two-way relaying over orthogonal frequency division multiplexing(OFDM) is considered,in which two nodes intend to exchange the information via a relay using physical-layer network coding(PLNC).Assuming that the full channel knowledge is available,an optimization problem,which maximizes the achievable sum rate under a sum-power constraint,is investigated.It is shown that the optimization problem is non-convex,which is difficult to find the global optimum solution in terms ... |
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| Keywords: | two-way relaying power allocation physical-layer network coding OFDM |
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