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A Single Feedback Based Interference Alignment for Three-User MIMO Interference Channels with Limited Feedback
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  • A Single Feedback Based Interference Alignment for Three-User MIMO Interference Channels with Limited Feedback
  • A Single Feedback Based Interference Alignment for Three-User MIMO Interference Channels with Limited Feedback
저자명
Chae. Hyukjin,Kim. Kiyeon,Ran. Rong,Kim. Dong Ku
간행물명
KSII Transactions on internet and information systems : TIIS
권/호정보
2013년|7권 4호|pp.692-710 (19 pages)
발행정보
한국인터넷정보학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Conventional interference alignment (IA) for a MIMO interference channel (IFC) requires global and perfect channel state information at transmitter (CSIT) to achieve the optimal degrees of freedom (DoF), which prohibits practical implementation. In order to alleviate the global CSIT requirement caused by the coupled relation among all of IA equations, we propose an IA scheme with a single feedback link of each receiver in a limited feedback environment for a three-user MIMO IFC. The main feature of the proposed scheme is that one of users takes out a fraction of its maximum number of data streams to decouple IA equations for three-user MIMO IFC, which results in a single link feedback structure at each receiver. While for the conventional IA each receiver has to feed back to all transmitters for transmitting the maximum number of data streams. With the assumption of a random codebook, we analyze the upper bound of the average throughput loss caused by quantized channel knowledge as a function of feedback bits. Analytic results show that the proposed scheme outperforms the conventional IA scheme in term of the feedback overhead and the sum rate as well.