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http://dx.doi.org/10.7840/KICS.2012.37A.1.64

SIC-Aware Relay Transceiving Filter Design for Multiuser Two-way Relaying Systems  

Park, Jin-Bae (경희대학교 전자전파공학과)
Wang, Jin-Soo (경희대학교 전자전파공학과)
Kim, Yun-Hee (경희대학교 전자전파공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.1A, 2012 , pp. 64-72 More about this Journal
Abstract
We consider multiuser multiple antenna two-way relaying systems in which all users exchange their data with their counterparts with the help of a relay. The systems complete all data exchanges in two time phases called multiple access phase and broadcasting phase for spectral efficiency and therby require an effective scheme reducing self-interference (SI) and multiuser interference (MUI). Different from the conventional scheme suppressing both SI and MUI at the relay, the proposed scheme adopts SI cancelation (SIC) at the users and renders the relay to suppress the MUI mainly considering the SIC output. We analyze the symbol error rate (SER) and the achievable diversity order of the proposed scheme when the multiple access phase is dominant in the performance and obtain simulation results on the SER and the sum rate under various conditions. The results show that the proposed scheme improves the symbol error rate and the sum rate remarkably at the cost of complexity increase.
Keywords
Two-way relaying; Optimal combining; Multiuser interference; Self-interference cancelation; Beamforming;
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