Robust Beamforming and Power Splitting for Secrecy Wireless Information and Power Transfer in Cognitive Relay Networks

2016 ◽  
Vol 20 (6) ◽  
pp. 1152-1155 ◽  
Author(s):  
Yanan Wu ◽  
Xiaoming Chen
Keyword(s):  
Relay Networks ◽  
Power Splitting ◽  
Robust Beamforming ◽  
Power Transfer ◽  
Cognitive Relay Networks

scholarly journals Outage Performance of Cognitive Relay Networks With Wireless Information and Power Transfer

2016 ◽  
Vol 65 (5) ◽  
pp. 3828-3833 ◽  
Author(s):  
Zheng Yang ◽  
Zhiguo Ding ◽  
Pingzhi Fan ◽  
George K. Karagiannidis
Keyword(s):  
Relay Networks ◽  
Power Transfer ◽  
Outage Performance ◽  
Cognitive Relay Networks

scholarly journals Simultaneous Wireless Information and Power Transfer Mechanism in Interference Alignment Relay Networks

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Fahui Wu ◽  
Lin Xiao ◽  
Dingcheng Yang ◽  
Laurie Cuthbert ◽  
Xiaoping Liu
Keyword(s):  
Energy Source ◽  
System Performance ◽  
Interference Alignment ◽  
Relay Networks ◽  
Power Splitting ◽  
Power Transfer ◽  
Relay Nodes ◽  
Relay System ◽  
Relay Systems ◽  
New Energy

This paper considers a simultaneous wireless information and power transfer (SWIPT) mechanism in an interference alignment (IA) relay system, in which source nodes send wireless information and energy simultaneously to relay nodes, and relay nodes forward the received signal to destination nodes powered by harvested energy. To manage interference and utilize interference as energy source, two-SWIPT receiver is designed, namely, power splitting (PS), and antennas switching (AS) has been considered for relay system. The performance of AS- and PS-based IA relay systems is considered, as is a new energy cooperation (ECop) scheme that is proposed to improve system performance. Numerical results are provided to evaluate the performance of all schemes and it is shown from the simulations that the performance of proposed ECop outperformed both AS and PS.

scholarly journals An Improved Robust Beamforming Design for Cognitive Multiantenna Relay Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Lulu Zhao ◽  
Guang Liang ◽  
Huijie Liu
Keyword(s):  
Computational Complexity ◽  
Channel Capacity ◽  
Relay Networks ◽  
Robust Beamforming ◽  
Worst Case ◽  
Channel Response ◽  
Cognitive Relay Networks ◽  
Simulation Results ◽  
Optimal Beamforming ◽  
Response Vector

This paper investigates the robust relay beamforming design for the multiantenna nonregenerative cognitive relay networks (CRNs). Firstly, it is proved that the optimal beamforming matrix could be simplified as the product of a variable vector and the conjugate transposition of a known channel response vector. Then, by exploiting the optimal beamforming matrix with simplified structure, an improved robust beamforming design is proposed. Analysis and simulation results show that, compared with the existing suboptimal scheme, the proposed method can achieve higher worst-case channel capacity with lower computational complexity.

Robust beamforming and power splitting design in MISO SWIPT downlink system

2016 ◽  
Vol 10 (6) ◽  
pp. 691-698 ◽  
Author(s):  
Zheng Chu ◽  
Weichen Xiang ◽  
Zhengyu Zhu ◽  
Jamal Hussein
Keyword(s):  
Power Splitting ◽  
Robust Beamforming ◽  
Downlink System

scholarly journals Robust Beamforming Design for Secure V2X Downlink System with Wireless Information and Power Transfer under a Nonlinear Energy Harvesting Model

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3294 ◽  
Author(s):  
Shidang Li ◽  
Chunguo Li ◽  
Weiqiang Tan ◽  
Baofeng Ji ◽  
Luxi Yang
Keyword(s):  
Energy Harvesting ◽  
Traffic Safety ◽  
Optimization Problem ◽  
Optimal Solution ◽  
Base Station ◽  
Power Splitting ◽  
Power Transfer ◽  
Vehicular Communication ◽  
Downlink System ◽  
Nonlinear Energy

Vehicle to everything (V2X) has been deemed a promising technology due to its potential to achieve traffic safety and efficiency. This paper considers a V2X downlink system with a simultaneous wireless information and power transfer (SWIPT) system where the base station not only conveys data and energy to two types of wireless vehicular receivers, such as one hybrid power-splitting vehicular receiver, and multiple energy vehicular receivers, but also prevents information from being intercepted by the potential eavesdroppers (idle energy vehicular receivers). Both the base station and the energy vehicular receivers are equipped with multiple antennas, whereas the information vehicular receiver is equipped with a single antenna. In particular, the imperfect channel state information (CSI) and the practical nonlinear energy harvesting (EH) model are taken into account. The non-convex optimization problem is formulated to maximize the minimum harvested energy power among the energy vehicular receivers satisfying the lowest harvested energy power threshold at the information vehicular receiver and secure vehicular communication requirements. In light of the intractability of the optimization problem, the semidefinite relaxation (SDR) technique and variable substitutions are applied, and the optimal solution is proven to be tight. A number of results demonstrate that the proposed robust secure beamforming scheme has better performance than other schemes.

Sign in / Sign up

Export Citation Format

Share Document