Sum capacity maximization in MIMO channels with multiuser interference

Authors:
Zohreh Motamedi;M. Reza Soleymani
Affiliations:
Concordia University, Montreal, Quebec, Canada;Concordia University, Montreal, Quebec, Canada
Venue:
PE-WASUN '05 Proceedings of the 2nd ACM international workshop on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
Year:
2005

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Abstract

The sum capacity of a multiuser system with interfering multiple input multiple output (MIMO) links is investigated. In an MIMO interfering system, the capacity of each link is a function of covariance matrices of transmit vectors. Therefore, the capacities of the links are mutually dependent and cannot be calculated individually. We consider the sum capacity of the L-user system as the objective function and investigate its convexity with respect to the transmit covariance matrices.