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Beamformer Optimization for the Full-Duplex AF Relay Wiretap Channels
- Issue Date
- Feb-2019
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Secrecy rate; relay wiretap channel; amplify and forward; beamformer design
- Citation
- IEEE WIRELESS COMMUNICATIONS LETTERS, v.8, no.1, pp.129 - 132
- Journal Title
- IEEE WIRELESS COMMUNICATIONS LETTERS
- Volume
- 8
- Number
- 1
- Start Page
- 129
- End Page
- 132
- ISSN
- 2162-2337
- Abstract
- We consider optimal beamforming (BF) for the multiantenna full-duplex (ED) amplify-and-forward relay that maximizes the secrecy rate in the relay eavesdropper channel. We first show that zero forcing condition (ZFC) with no self-interference from the loop-back channel at the ED relay is the necessary condition for finding the optimal beamformer. Then, we provide an optimization method to locate the best pair among the ZFC beamformers. Through some simulations, we evaluate and compare the performances of the proposed optimal zero forcing BF scheme and a reference BF scheme.
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