scholarly journals Joint transmitter and PS factor optimal design for secure transmission in MIMO full-duplex relay network powered by SWIPT with perfect and imperfect channel state information

2020 ◽  
Vol 14 (6) ◽  
pp. 1056-1064
Author(s):  
Meng Zhang ◽  
Jianhong Zheng ◽  
Yun He
Keyword(s):  
Optimal Design ◽  
Channel State Information ◽  
Full Duplex ◽  
Relay Network ◽  
Imperfect Channel State Information ◽  
Channel State ◽  
State Information ◽  
Secure Transmission ◽  
Full Duplex Relay

scholarly journals Full-Duplex Relay with Delayed CSI Elevates the SDoF of the MIMO X Channel

Entropy ◽  
2021 ◽  
Vol 23 (11) ◽  
pp. 1484
Author(s):  
Tong Zhang ◽  
Gaojie Chen ◽  
Shuai Wang ◽  
Rui Wang
Keyword(s):  
Lower Bound ◽  
Channel State Information ◽  
Interference Alignment ◽  
Upper Bounds ◽  
Full Duplex ◽  
Multiple Antenna ◽  
Lower And Upper Bounds ◽  
Channel State ◽  
State Information ◽  
Full Duplex Relay

In this article, the sum secure degrees-of-freedom (SDoF) of the multiple-input multiple-output (MIMO) X channel with confidential messages (XCCM) and arbitrary antenna configurations is studied, where there is no channel state information (CSI) at two transmitters and only delayed CSI at a multiple-antenna, full-duplex, and decode-and-forward relay. We aim at establishing the sum-SDoF lower and upper bounds. For the sum-SDoF lower bound, we design three relay-aided transmission schemes, namely, the relay-aided jamming scheme, the relay-aided jamming and one-receiver interference alignment scheme, and the relay-aided jamming and two-receiver interference alignment scheme, each corresponding to one case of antenna configurations. Moreover, the security and decoding of each scheme are analyzed. The sum-SDoF upper bound is proposed by means of the existing SDoF region of two-user MIMO broadcast channel with confidential messages (BCCM) and delayed channel state information at the transmitter (CSIT). As a result, the sum-SDoF lower and upper bounds are derived, and the sum-SDoF is characterized when the relay has sufficiently large antennas. Furthermore, even assuming no CSI at two transmitters, our results show that a multiple-antenna full-duplex relay with delayed CSI can elevate the sum-SDoF of the MIMO XCCM. This is corroborated by the fact that the derived sum-SDoF lower bound can be greater than the sum-SDoF of the MIMO XCCM with output feedback and delayed CSIT.

Multicast Beamforming for SWIPT in MISO Full-Duplex Systems

2021 ◽  
Vol 16 (1) ◽  
pp. 26-33
Author(s):  
Alexander Akpofure Okandeji
Keyword(s):  
Energy Harvesting ◽  
Channel State Information ◽  
Base Station ◽  
Semidefinite Relaxation ◽  
Full Duplex ◽  
Power Splitting ◽  
Power Transfer ◽  
Imperfect Channel State Information ◽  
Channel State ◽  
State Information

This paper considers the multicast transmit beamforming and receive power splitting problem for sum transmit power minimization for a simultaneous wireless information and power transfer (SWIPT) system subject to signal-to-interference-plus-noise ratio (SINR), and energy harvesting constraints at the receiver. In particular, we consider the case of perfect and imperfect channel state information (CSI) at the base station. Using semidefinite relaxation (SDR) technique, we obtain solution to the problem with imperfect channel state information of the self-interfering channels. Keywords: Simultaneous wireless information and power transfer, channel state information, Energy harvesting, semidefinite relaxation.

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