콘텐츠 본문
논문 해외 국제전문학술지(SCI급) OPPORTUNISTIC FEEDBACK AND USER SELECTION FOR MULTIUSER TWO-WAY AMPLIFY-AND-FORWARD RELAY IN TIME-VARYING CHANNELS
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2013-10
- 저자명 JEONG, ER (JEONG, EUI-RIM)공동(교신),JANG, YU (JANG, YONG-UP)
- 학술지명 IEICE TRANSACTIONS ON COMMUNICATIONS
- 발행처명 IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 2
논문 초록 (Abstract)
This paper proposes an opportunistic feedback and user selection method for a multiuser two-way relay channel (MU-TWRC) in a time-varying environments where a base station (BS) and a selected mobile station (MS), one of K moving MSs, exchange messages during two time slots via an amplify-and-forward relay station. Specifically, under the assumption of perfect channel reciprocity, we analyze the outage probabilities of several channel feedback scenarios, including the proposed scheme. Based on the analysis, the transmission rates are optimized and the optimal user selection method is proposed to maximize the expected sum throughput. The simulation results indicate that, with opportunistic feedback, the performance can be significantly improved compared to that without feedback. Moreover, the performance is nearly identical to that with full feedback, and close to the case of perfect channel state information at BS for low mobility MSs. Copyright © 2013 The Institute of Electronics, Information and Communication Engineers.
