期刊
IEEE COMMUNICATIONS LETTERS
卷 18, 期 12, 页码 2169-2172出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2014.2367527
关键词
Achievable secrecy rate; decode-and-forward (DF); full-duplex (FD); power allocation; relay network
资金
- National Natural Science Foundation of China [61472458, 61202498, 61173148]
For full-duplex (FD) relay networks, secure communication is an important issue. In this letter, considering decode-and-forward scheme, we investigate the optimal power allocation for multicarrier secure communication in FD relay networks. Our objective is to maximize the achievable secrecy rate of FD relay network subject to sum power constraint of the source and FD relay. The formulated nonconvex optimization problem is equivalently transformed into a convex problem. Employing Karush-Kuhn-Tucker conditions, we obtain a closed-form solution to the optimization problem. Simulation results have shown that the proposed optimal power allocation scheme for FD relaying outperforms that for conventional half-duplex relaying.
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