Title :
A robust rate-adaptive hybrid ARQ scheme for frequency-hopped spread-spectrum multiple-access communication systems
Author :
Bigloo, A.M.Y. ; Gulliver, T. Aaron ; Wang, Q. ; Bhargava, Vijay K.
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada
fDate :
6/1/1994 12:00:00 AM
Abstract :
This paper considers the application of rate-adaptive coding (RAC) to a spread spectrum multiple access (SSMA) communication system. Specifically, RAC using a variable rate Reed-Solomon (RS) code with a single decoder is applied to frequency-hopped SSMA. We show that this combination can accommodate a larger number of users compared to that with conventional fixed-rate coding. This increase is a result of a reduction in the channel interference from other users. The penalty for this improvement in most cases is a slight increase in the delay (composed of propagation and decoding delay). The throughput and the undetected error probability for a M-ary symmetric channel are analyzed, and performance results are presented
Keywords :
Reed-Solomon codes; encoding; error statistics; frequency agility; interference suppression; multi-access systems; probability; protocols; radiofrequency interference; spread spectrum communication; M-ary symmetric channel; channel interference reduction; decoder; decoding delay; frequency-hopped SSMA; frequency-hopped spread-spectrum; multiple-access communication systems; performance results; propagation delay; rate-adaptive coding; rate-adaptive hybrid ARQ; spread spectrum multiple access; throughput; undetected error probability; variable rate Reed-Solomon code; Automatic repeat request; Decoding; Error probability; Frequency; Interference; Propagation delay; Reed-Solomon codes; Robustness; Spread spectrum communication; Throughput;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
