Robust Precoding and Beamforming Design of OSTBC Based CR AF-MIMO Relay System with Energy Harvesting Receiver.

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Bibliographic Details
Title:	Robust Precoding and Beamforming Design of OSTBC Based CR AF-MIMO Relay System with Energy Harvesting Receiver.
Authors:	Wang, Bingjie¹ 501257288@qq.com, Zhang, Qi¹ zhqi26@mail.sysu.edu.cn, Qin, Jiayin¹ issqjy@mail.sysu.edu.cn
Source:	Wireless Personal Communications. Dec2015, Vol. 85 Issue 3, p1153-1165. 13p.
Subjects:	Beamforming, Performance of MIMO systems, Cognitive radio, MIMO systems -- Design & construction, Energy harvesting
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. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
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. [ABSTRACT FROM AUTHOR]
ISSN:	09296212
DOI:	10.1007/s11277-015-2832-1