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Distributed algorithms for spectral and energy-efficiency maximization of K-user interference channels

Abstract: In this paper, we propose a cooperative distributed framework to optimize a variety of rate and energy-efficiency (EE) utility functions, such as the minimum-weighted rate or the global EE, for the K-user interference channel. We focus on the single-input multiple-output (SIMO) case, where each user, based solely on local channel state information (CSI) and limited exchange information from other users, optimizes its transmit power and receive beamformer, although the framework can also be extended to the multiple-output multiple-input (MIMO) case. The distributed framework combines an alternating optimization approach with majorization-minimization (MM) techniques, thus ensuring convergence to a stationary point of the centralized cost function. Closed-form power update rules are obtained for some utility functions, thus obtaining very fast convergence algorithms. The receivers treat interference as noise (TIN) and apply the beamformers that maximize the signal-to-interference-plus-noise (SINR). The proposed cooperative distributed algorithms are robust against channel variations and network topology changes and, as our simulation results suggest, they perform close to the centralized solution that requires global CSI. As a benchmark, we also study a non-cooperative distributed framework based on the so-called "signal-to-leakage-plus-noise ratio" (SNLR) that further reduces the overhead of the cooperative version.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Soleymani M., Santamaria I., Schreier P.J.,

 Fuente: IEEE Access, 2021, 9, 96948-96963

Editorial: Institute of Electrical and Electronics Engineers, Inc.

 Fecha de publicación: 05/07/2021

Nº de páginas: 16

Tipo de publicación: Artículo de Revista

 DOI: 10.1109/ACCESS.2021.3094976

ISSN: 2169-3536

 Proyecto español: PID2019-104958RB-C43

Url de la publicación: https://doi.org/10.1109/ACCESS.2021.3094976