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2984 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 8, AUGUST 2007 Equilibrium Efficiency Improvement in
 

Summary: 2984 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 8, AUGUST 2007
Equilibrium Efficiency Improvement in
MIMO Interference Systems:
A Decentralized Stream Control Approach
G¨urdal Arslan, Member, IEEE, M. Fatih Demirkol, Member, IEEE, and Yang Song, Student Member, IEEE
Abstract-- We consider a multi-link MIMO interference sys-
tem in which each link wishes to maximize its own mutual
information by choosing its own signal vector, which leads
to a multi-player game. We show the existence of a Nash
equilibrium and obtain sufficient conditions for the uniqueness
of equilibrium. We consider two decentralized link adjustment
algorithms called best-response process (a.k.a. iterative water-
filling) and gradient-play (an autonomous and non-cooperative
version of the well-known gradient ascent algorithm). Under
our uniqueness conditions, we establish the convergence of these
algorithms to the unique equilibrium provided that the links use
some inertia.
To improve the efficiency of an equilibrium with respect to the
total mutual information by imposing limits on the number of
independent data streams, we present a stream control approach

  

Source: Arslan, Gürdal - Department of Electrical Engineering, University of Hawai'i at Manoa

 

Collections: Engineering