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2019 | OriginalPaper | Buchkapitel

Optimal Beamforming for Multiuser Secure SWIPT Systems (Invited Paper)

verfasst von : Yuqing Su, Derrick Wing Kwan Ng

Erschienen in: Industrial Networks and Intelligent Systems

Verlag: Springer International Publishing

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Abstract

In this paper, we study the beamforming design for simultaneous wireless information and power transfer (SWIPT) downlink systems. The design is formulated as a non-convex optimization problem which takes into account the quality of service (QoS) requirements of communication security and minimum harvested power. In particular, the proposed design advocates the dual use of energy signal to enable secure communication and efficient WPT. The globally optimal solution of the optimization problem is obtained via the semidefinite programming relaxation (SDR). Our simulation results show that there exists a non-trivial tradeoff between the achievable data rate and the total harvested power in the system. Besides, our proposed optimal scheme provides a substantial performance gain compared to a simple suboptimal scheme based on the maximum ratio transmission (MRT).

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Fußnoten
1
Recently, various non-linear energy harvesting models have been proposed in the literature, e.g. [33, 34]. However, in this paper, we adopt the conventional linear energy harvesting model for the ease of illustration.
 
2
It can be verified that matrix \(\mathbf {B}\) is not a negative definite or a negative semi-definite matrix.
 
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Metadaten
Titel
Optimal Beamforming for Multiuser Secure SWIPT Systems (Invited Paper)
verfasst von
Yuqing Su
Derrick Wing Kwan Ng
Copyright-Jahr
2019
Buch
Industrial Networks and Intelligent Systems

Print ISBN: 978-3-030-05872-2

Electronic ISBN: 978-3-030-05873-9

Copyright-Jahr: 2019

DOI
https://doi.org/10.1007/978-3-030-05873-9_1