Paper Info
Title
Coordinated Beamforming With Relaxed Zero Forcing: The Sequential Orthogonal Projection Combining Method and Rate Control
Abstract
In this paper, coordinated beamforming based on relaxed zero forcing (RZF) for $K$ transmitter-receiver pair multiple-input single-output (MISO) and multiple-input multiple-output (MIMO) interference channels is considered. In the RZF coordinated beamforming, conventional zero-forcing interference leakage constraints are relaxed so that some predetermined interference leakage to undesired receivers is allowed in order to increase the beam design space for larger rates than those of the zero-forcing (ZF) scheme or to make beam design feasible when ZF is impossible. In the MISO case, it is shown that the rate-maximizing beam vector under the RZF framework for a given set of interference leakage levels can be obtained by sequential orthogonal projection combining (SOPC). Based on this, exact and approximate closed-form solutions are provided in two-user and three-user cases, respectively, and an efficient beam design algorithm for RZF coordinated beamforming is provided in general cases. Furthermore, the rate control problem under the RZF framework is considered. A centralized approach and a distributed heuristic approach are proposed to control the position of the designed rate-tuple in the achievable rate region. Finally, the RZF framework is extended to MIMO interference channels by deriving a new lower bound on the rate of each user.
Year
DOI
Venue
2013
10.1109/TSP.2013.2258343
IEEE Transactions on Signal Processing
Keywords
DocType
Volume
mimo interference channel,distributed heuristic approach,rate control problem,rate control,pareto-optimal,sequential orthogonal projection combining,radio transmitters,relaxed zero forcing,radiofrequency interference,miso interference channel,coordinated beamforming,zero-forcing interference leakage constraint,sopc,transmitter-receiver pair multiple-input single-output,mimo communication,multiple-input multiple-output,inter-cell interference,array signal processing,rzf coordinated beamforming,wireless channels,predetermined interference leakage,interference leakage level,relaxed zero-forcing,beam design algorithm,radio receivers,multi-cell mimo,rate-tuple,rate-maximizing beam vector,rate region
Journal
61
Issue
ISSN
Citations 
12
1053-587X
17
PageRank 
References 
Authors
0.72
22
4
Name
Order
Citations
PageRank
Juho Park1544.46
Gilwon Lee21488.70
Youngchul Sung362145.85
Masahiro Yukawa427230.44