상세정보
학술지
Neutralizing Interferences in Two-Hop Amplify-and-Forward MIMO Relay Systems
- 저자
- 신창용, 노고산
- 발행일
- 201607
- 출처
- IEEJ Transactions on Electrical and Electronic Engineering, v.11 no.Suppl. S1, pp.S108-S114
- ISSN
- 1931-4973
- 출판사
- Institute of Electrical Engineers of Japan
- 협약과제
- 15ZI1100, 트래픽 용량 증대를 위한 액세스 네트워크 원천기술 연구, 김진업
- 초록
- In this paper, we present the interference neutralization technique for two-hop multiple-input multiple-output (MIMO) relay systems. It enables multiple MIMO transmitters (sources) to simultaneously transmit independent data streams to their MIMO receivers (destinations) without mutual interferences, thereby improving spectral efficiency of the systems. To neutralize the mutual interferences using multiple amplify-and-forward (AF) MIMO relays, we establish the sufficient condition for the antenna configuration in the MIMO relay networks, and provide a filter design technique for the AF MIMO relays. The proposed method increases sum rates of the systems linearly with the number of transmitters participating in simultaneous transmission. To improve the sum rates further, this method is combined with transmit power allocation using the water-filling algorithm. In addition, it is shown that by employing the minimum number of relays required to meet the sufficient condition, the system cost for the proposed method can be reduced without compromising the sum rate performance severely. Finally, simulation results successfully demonstrate that by exploiting radio resources such as frequency and time efficiently, the proposed method achieves a higher sum rate than the existing techniques based on interference avoidance. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
- KSP 제안 키워드
- Amplify-and-forward (af), Data stream, Design techniques, Interference Avoidance, Interference Neutralization(IN), MIMO transmitters, Multiple-input multiple-output (MIMO) relay, Simultaneous transmission, Spectral efficiency(SE), Sufficient conditions, Sum rate