Distributed Beamformer Construction for Successive Stream Selection on the Interference Channel
Mustapha Amara, Mylène Pischella, Didier Le Ruyet · HAL (Le Centre pour la Communication Scientifique Directe) · 2013
Interference channel is by definition a configurationwithout any centralized entity. Thus information exchangebecomes a bottleneck problem as it is required to construct anyinterference minimization solution. In this paper, we propose adistributed quasi-orthogonal precoder/decoder design solutionon the interference channel. The method reduces the requiredexchanges between users as well as the amount of required CSI.In fact, we consider no apriory knowledge on the interferingchannels. The interference, i.e. forbidden directions, are estimatedin both transmission and reception. This boils down tothe estimation of two simple vectors for each user. Moreover,the proposed method is a recursive selection procedure thuswith no convergence issues that selects one by one streamsas long as the total sum-rate keeps increasing. We presenthere the adopted methodology for stream selection and presentsome simulation results showing good performances comparedto centralized algorithms.