Interference alignment via minimizing projector distances of interfering subspaces

Samer Bazzi, Guido Dietl, Wolfgang Utschick

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Scopus citations

Abstract

A novel interference alignment (IA) algorithm is presented. Interference alignment solutions can be obtained in closed-form for special cases only. In general, iterative algorithms need to be used. Most of these algorithms are based on a joint design of precoders at the transmitter side and receive filters at the receiver side, while the proposed method achieves IA with a precoder design only. We present a new formulation, with more geometrical insights to the IA problem. A design based on precoders simplifies the problem structure and allows receive filters to be designed independently of the IA conditions. We show that optimal precoders lie in complex Grassmannian manifolds. Consequently, the proposed algorithm is an alternating optimization algorithm on the Grassmannian manifold. Simulation results show that a precoder based scheme does not lead to any performance degradation and that the same degrees of freedom as state-of-the-art methods are achieved.

Original languageEnglish
Title of host publication2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
Pages274-278
Number of pages5
DOIs
StatePublished - 2012
Event2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012 - Cesme, Turkey
Duration: 17 Jun 201220 Jun 2012

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Conference

Conference2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
Country/TerritoryTurkey
CityCesme
Period17/06/1220/06/12

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