Title :
Comparison of two ARQ protocols in a Rayleigh fading channel
Author :
Chuang, Justin C I
Author_Institution :
Bellcore, Red Bank, NJ, USA
fDate :
11/1/1990 12:00:00 AM
Abstract :
Go-back-N (GBN) and selective repeat (SR) protocols for automatic repeat request (ARQ) are compared in a frequency-nonselective Rayleigh fading channel. Protocols implemented in software are used in a computer-simulated fading channel to study the throughput of these protocols as a function of fading parameters, such as the mean signal-to-noise ratio (SNR), maximum Doppler frequency number of diversity branches, time-out period and round-trip delay. The purpose is to complement well-documented theoretical work in (1) providing some design considerations and (2) investigating quantitatively whether data communications combining detection-only coding, diversity, and basic ARQ protocols can offer reasonable throughput in a fading channel. Although based on a set of assumptions, the following conclusions remain valid: (1) SR is significantly superior to GBN when the fading rate is high; this advantage decreases as fading becomes slower; and (2) error detection combined with ARQ and diversity selection can provide reliable data communications in a Rayleigh fading channel
Keywords :
data communication systems; digital radio systems; fading; mobile radio systems; protocols; telecommunication channels; ARQ protocols; Rayleigh fading channel; automatic repeat request; computer-simulated fading channel; data communications; digital radio; diversity branches; diversity selection; error detection; go-back-N protocol; maximum Doppler frequency; round-trip delay; selective repeat protocol; signal-to-noise ratio; throughput; time-out period; Automatic repeat request; Data communication; Diversity reception; Fading; Frequency; Protocols; Rayleigh channels; Signal to noise ratio; Strontium; Throughput;
Journal_Title :
Vehicular Technology, IEEE Transactions on