Outage Analysis of Cooperative HARQ-IR over Time-Correlated Fading Channels Based on Inverse Moments

Abstract

This paper conducts outage analysis for cooperative hybrid automatic repeat request with incremental redundancy (C-HARQ-IR). A general time-correlated Nakagami fading channel including fast fading and Rayleigh fading as special cases is considered. An efficient truncated inverse moment matching method is developed to derive the outage probability in closed- form. The accuracy of the analytical results is verified by Monte Carlo simulations and the results reveal that C-HARQ-IR protocol can benefit from high fading order and low channel time correlation.