Optimization of Closed-Loop Power Control for Wireless Multiple Orthogonal Access Schemes with Correlated Sources

Abstract

In this paper, we study the performance of wireless multiple-access communication systems, where two correlated sources communicate to an access point (AP). The communication links are affected by Rayleigh fading, and the source correlation is exploited only at the AP, which makes use of closed-loop power control (CLPC) to counter-act the effects of fading. We first propose an analytical framework to evaluate the theoretical performance limits in the presence of feedback (power control). Then, we consider coded communication schemes, where the sources make use of turbo codes and the AP performs joint source-channel decoding. A simple feedback power control strategy is considered and its performance is evaluated through simulations.