Title :
Reed-Solomon coding for CELP EDAC in land mobile radio
Author :
Ray, David E. ; Rahikka, D.J.
Author_Institution :
U.S. Dept. of Defense, USA
Abstract :
Code excited linear prediction (CELP) is a voice-coding technique developed by AT&T Bell Labs and the U.S. Department of Defense which has been adopted by the Federal Government as Federal Standard (FS) 1016. The U.S. Government is researching the use of CELP in the future digital narrowband land mobile radio (LMR). LMR channels are in the VHF-UHF range, subject to fading and burst error conditions. This paper documents a study of the effectiveness of Reed-Solomon (RS) codes in error detection and control strategies to protect the parametric information of the CELP coder in LMR channels. It is shown that the (13,7) RS code over GF(16), protecting 84 CELP bits in 3 codewords, is best suited for this purpose. A system of error control using the (13,7) code is shown to compare favorably to a previously proposed system using the (23,12) Golay code
Keywords :
Reed-Solomon codes; digital radio; error correction codes; error detection codes; fading; land mobile radio; linear predictive coding; speech coding; vocoders; (13,7) RS code; (23,12) Golay code; CELP EDAC; Federal Standard 1016; GF(16); LMR channels; Reed-Solomon coding; VHF-UHF range; burst error; digital narrowband land mobile radio; error control; error detection; fading; land mobile radio; parametric information; voice-coding technique; Bit error rate; Error correction; Error correction codes; Gaussian noise; Government; Land mobile radio; Protection; Reed-Solomon codes; Speech synthesis; Stochastic processes;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.389299
