Title :
Soft decision decoding for bandwidth efficient RS coded MPSK schemes over a Rayleigh fading channel
Author :
Jameli, S.H. ; Le-Ngoc, Tho
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
The authors consider the performance of the bandwidth-efficient RS (Reed-Solomon) coded MPSK schemes using soft-decision decoding over a Rayleigh fading channel. For the short codes it is practical to perform soft-decision decoding by introducing a trellis structure and using the Viterbi algorithm. The authors carried out upper bound analysis and computer simulation for Viterbi decoding of two short RS-coded 8PSK (phase shift keying) schemes, namely, RS(7,5) coded 8PSK, and RS(6,4) coded 8PSK. It is found that for a bit error rate of 10-5 about 8.5 dB and 6.5 dB coding gain can be obtained compared to errors-only and errors-and-erasures decoding, respectively. This improvement increases drastically by increasing the signal-to-noise ratio. Furthermore, the use of the channel state information provides 1 dB additional improvement in the performance
Keywords :
decoding; error correction codes; fading; phase shift keying; telecommunication channels; 8PSK; RS coded MPSK; Rayleigh fading channel; Reed-Solomon codes; Viterbi algorithm; bandwidth efficiency; channel state information; coding gain; computer simulation; performance; phase shift keying; signal-to-noise ratio; soft-decision decoding; trellis structure; upper bound analysis; Bandwidth; Bit error rate; Computer simulation; Decoding; Fading; Gain; Phase shift keying; Reed-Solomon codes; Upper bound; Viterbi algorithm;
Conference_Titel :
Military Communications Conference, 1991. MILCOM '91, Conference Record, Military Communications in a Changing World., IEEE
Conference_Location :
McLean, VA
Print_ISBN :
0-87942-691-8
DOI :
10.1109/MILCOM.1991.258463
