MMSE Performance Analysis of Generalized Multibeam Satellite Channels

TL;DR

This paper develops an analytical framework to evaluate the MMSE performance of multiuser channels with full receive correlation in multibeam satellite communications, aiding the design of next-generation high-capacity satellite systems.

Contribution

It introduces a generalized, tight approximation framework for MMSE performance in correlated multibeam satellite channels, extending existing solutions to various fading models.

Findings

Proposed tight approximation for MMSE performance

Framework applicable to different fading models

Simulation confirms approximation accuracy

Abstract

Aggressive frequency reuse in the return link (RL) of multibeam satellite communications (SatComs) is crucial towards the implementation of next generation, interactive satellite services. In this direction, multiuser detection has shown great potential in mitigating the increased intrasystem interferences, induced by a tight spectrum reuse. Herein we present an analytic framework to describe the linear Minimum Mean Square Error (MMSE) performance of multiuser channels that exhibit full receive correlation: an inherent attribute of the RL of multibeam SatComs. Analytic, tight approximations on the MMSE performance are proposed for cases where closed form solutions are not available in the existing literature. The proposed framework is generic, thus providing a generalized solution straightforwardly extendable to various fading models over channels that exhibit full receive correlation. Simulation results are provided to show the tightness of the proposed approximation with respect to the available transmit power.