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학술지 Regularized Zero-Forcing Interference Alignment for the Two-Cell MIMO Interfering Broadcast Channel
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저자
신준우, 문재균
발행일
201307
출처
IEEE Communications Letters, v.17 no.7, pp.1336-1339
ISSN
1089-7798
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LCOMM.2013.060513.122713
협약과제
13VI1400, 스마트 모바일 서비스를 위한 B4G 이동통신 기술 개발, 송평중
초록
We present linear transmit-receive filter design strategies for the two-cell multiple-input multiple-output (MIMO) interfering broadcast channel (IBC) where inter-cell interference (ICI) exists in addition to inter-user interference (IUI) within the cell. We first formulate a generalized zero-forcing interference alignment (ZF-IA) method capable of handling multiple data streams for each user. We proceed to further adjust the transmit-receive filters based on the minimum weighted-mean-square-error (WMSE) principle using the weights obtained from the initial generalized ZF-IA design, in an effort to to enhance the sum-rate performance. In contrast to the existing weighted-sum-rate-maximizing scheme, our method does not require an iterative calculation of the weights. Because of this, the proposed scheme, while not designed specifically to maximize the sum-rate, is computationally efficient and delivers favorable tradeoffs between performance and information exchange overhead. © 1997-2012 IEEE.
키워드
Power allocation, quality of service, two-way relay systems
KSP 제안 키워드
Computationally Efficient, Information Exchange, Interference Alignment(IA), Iterative calculation, Multiple data streams, Multiple input multiple output(MIMO), Sum rate, Two-way relay system, Zero forcing(ZF), design strategy, inter-cell interference(ICI)