CELP coding for land mobile radio applications
D.J. Rahikka, Thomas E. Tremain, V.C. Welch, Joseph P. Campbell · International Conference on Acoustics, Speech, and Signal Processing · 2002
The performance of the Proposed Federal Standard 1024 8000-b/s system for digital land mobile radio on a 12.5- or 6.25-kHz channel is described. The system contains the Proposed Federal Standard 1016 4800-b/s code excited linear predictive (CELP) voice coder developed by the US DOD and AT&T Bell Laboratories. The system is error protected with 2400 b/s and has 800 b/s for overhead signaling. The system is intended to replace the 12 kHz continuous variable slope deltamod (CVSD) voice coder which is used in Federal Standard 1025. The error protection technique used is Golay coding with hard or soft decoding. The performance of this error protection over simulated fading radio channels is described.>