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A Bi-directional Coding using Time Reversal Mirror in Relay Systems  

Kwon, Yang-Soo (인하대학교 전자공학과 무선이동통신 연구실)
Yoo, Jae-Ho (인하대학교 전자공학과 무선이동통신 연구실)
Kim, Hyeon-Su (인하대학교 전자공학과 무선이동통신 연구실)
Chung, Jae-Hak (인하대학교 전자공학과 무선이동통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.12A, 2008 , pp. 1156-1164 More about this Journal
Abstract
In this paper, we propose a bi-directional coding method (BTC) using time reversal mirror for effective data exchange between mobile stations and basestations. In conventional relay systems, while one node transmits data, other nodes should keep silent to avoid interference. Thus, to interchange data between basestations and mobile stations, it needs four stages. However, using the proposed BTC method, a relay station transmits a probe source before data transmission, and using this information, mobile stations and basestations transmit data to the relay station simultaneously. Therefore, since it exchanges data in only two steps, the system achieves improved system capacity. In addition, owing to no need for complex calculation, the relay system can be implemented with low complexity. The simulation results demonstrate that the proposed method achieves enhanced system capacity.
Keywords
Bi-directional coding; Time reversal mirror; Relay system; capacity;
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