Hybrid DF and SIR Forwarding Strategy in Cooperative Communications and Higher Order Modulations
Slim Chaoui, Madallah Alruwaili, Haifa Harrouch, Omar Alruwaili · 2024
In this paper we propose a hybrid decode and forward and soft information relaying (HDFSIR) strategy to address the issue of error-propagation in coded cooperative communications. We also introduce a novel method for mapping the conveyed bits' log likelihood ratios onto higher order modulated soft symbols and provide a model characterizing the relationship between the estimated complex soft symbol and the actual high order modulation symbol. A closed form expression for the symbol error rate of the coded cooperative communication with HDFSIR strategy is derived. Monte Carlo simulations are presented to demonstrate the validity of the analytical results.