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 Home > Achievement > Main Contributions > SCI > Self-Energy Recycling for RF Powered Multi-antenna Relay channels

Domestic/International 국외  Principal Author Tae-Jin Lee, Keum Cheol Hwang, Dong In Kim 
Title Self-Energy Recycling for RF Powered Multi-antenna Relay channels 
Journal IEEE Transactions on Wireless Communications (Impact Factor : 2.925 ; JCR 상위 10%) 
Authors Duckdong Hwang, Keum Cheol Hwang, Dong In Kim, Tae-Jin Lee 
Date 2017년 02월 Page 812-824 
Volume 16   Number 2 

 We investigate self-energy recycling (S-ER) based RF powered multi-antenna relay channels (RC) for the coverage
extension in sensor networks or small cells. In the S-ER based RF powered RC, the power used at the relay station (RS) for data transmission depends only on the energy from the access point (AP) and the recycled energy from its own transmission. We propose an optimal beamforming scheme with associated protocols and study their behaviors for both cases of downlink only and joint up-down link. Strategies for the power allocation between data transmission and RF powering are provided and a comparison with the conventional RF powered RC is made.
For the proposed power allocation strategies, the performance of the conventional RC is achieved by the proposed RF powered RC only when infinite RF power is available. A high value of S-ER helps the proposed systems to reach the performance of conventional relay systems. In the joint up-down link protocol, we show that the up-down rate region can simply be constructed with easy power allocation strategy.

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