Interference alignment limits for K-user frequency-flat MIMO interference channels

Author

Negro, Francesco ; Shenoy, Shakti Prasad ; Slock, Dirk T. M. ; Ghauri, Irfan

Author_Institution

Mobile Commun. Dept., EURECOM, Sophia Antipolis, France

fYear

2009

fDate

24-28 Aug. 2009

Firstpage

2445

Lastpage

2449

Abstract

Starting from the zero-forcing constraints, some conditions to be satisfied in order to admit an interference alignment (IA) solution for any K-user frequency-flat MIMO interference channel are derived. Our conditions allow for analytical evaluation of the existence of IA solutions (or lack thereof) for a given K-user MIMO interference channel and degree of freedom allocation. We discuss interference alignment duality and the optimality of linear minimum mean squared error (LMMSE) interference reduction at the receiver for user rate maximization. Motivated by this, we suggest an algorithm for distributed interference alignment in a time division duplex (TDD) setting.

Keywords

MIMO communication; least mean squares methods; optimisation; telecommunication channels; K-user frequency-flat MIMO interference channels; degree of freedom allocation; distributed interference alignment; interference alignment limits; linear minimum mean squared error interference reduction; time division duplex; user rate maximization; zero-forcing constraints; Abstracts; Antennas; Interference; MIMO; Pressing; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2009 17th European

Conference_Location

Glasgow

Print_ISBN

978-161-7388-76-7

Type

conf

Filename

7077826