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

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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]
Copyright of Wireless Personal Communications is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: 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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  Data: <i>Copyright of Wireless Personal Communications is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Type: general
      – SubjectFull: Performance of MIMO systems
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      – SubjectFull: Cognitive radio
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