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- Title
Robust Precoding and Beamforming Design of OSTBC Based CR AF-MIMO Relay System with Energy Harvesting Receiver.
- Authors
Wang, Bingjie; Zhang, Qi; Qin, Jiayin
- Abstract
In this paper, we investigate the robust precoding and beamforming design problem for orthogonal space-time block code (OSTBC) based cognitive radio amplify-and-forward multiple-input-multiple-output relay systems with simultaneous wireless information and power transfer which consists of a primary receiver, a secondary source, a secondary relay, a secondary destination and an energy harvesting receiver. The secondary source and the secondary relay employ OSTBC based precoding and beamforming. The secondary relay and the secondary destination employ maximum-ratio combining for signal detecting and decoding. Our objective is to maximize the worst-case achievable rate under the sum transmit power constraint, the worst-case sum harvested power constraint and the worst-case interference power constraint. We transform the objective function into a convex function and convert the semi-infinite constraints into linear matrix inequalities by using $${\mathcal {S}}$$ -Lemma and the extension of $${\mathcal {S}}$$ -Lemma. Simulation results demonstrate that our proposed robust precoding and beamforming design has significant performance gain over the non-robust one.
- Subjects
BEAMFORMING; PERFORMANCE of MIMO systems; COGNITIVE radio; MIMO systems -- Design &; construction; ENERGY harvesting
- Publication
Wireless Personal Communications, 2015, Vol 85, Issue 3, p1153
- ISSN
0929-6212
- Publication type
Article
- DOI
10.1007/s11277-015-2832-1