Hybrid ARQ with selective combining for fading channels

摘要

We propose and analyze a hybrid automatic repeat request (ARQ)nwith a selective combining scheme using rate-compatible puncturednconvolutional (RCPC) codes for fading channels. A finite-state Markovnchannel model is used to represent the Rayleigh fading channels. We shownthat the hybrid ARQ with selective combining yields better performancenthan the generalized type-II ARQ scheme for fading channels.nFurthermore, simulation results of real-time video time divisionnmultiple access (TDMA) transmission system are given. Better videonquality can be obtained by our proposed scheme, with a bounded delay.nAnalytical results of throughput and packet error rate (PER) arencompared to the simulated results. Our analysis based on a finite-statenMarkov channel model, is shown to give good agreement with simulations