Title :
A proposed Federal Standard for narrowband digital land mobile radio
Author :
Levesque, A. ; Pizzi, S. ; Duncombe, C.
Author_Institution :
GTE Gov. Syst. Corp., Waltham, MA, USA
fDate :
30 Sep-3 Oct 1990
Abstract :
The technical characteristics and features of a standard defining interoperable digitized voice and digital data modes operating at 8000 b/s with 12.5 kHz or narrower channel spacings at frequencies above 30 MHz are described. The voice modes will incorporate the US government standard 4800 b/s code-excited linear prediction (CELP) voice coding algorithm. Both voice and data modes will utilize error control coding with interleaving to combat error bursts typical of digital land mobile radio communication channels. The baseband transmission format is designed with a superframe structure that will provide for reliable late-entry synchronization. The data rate, transmission modes, transmission format, and modulation technique are discussed
Keywords :
digital radio systems; encoding; mobile radio systems; speech analysis and processing; standards; 4.8 kbit/s; 8 kbit/s; CELP; Federal Standard; baseband transmission format; code-excited linear prediction; data rate; digital data modes; digitized voice; error control coding; interleaving; late-entry synchronization; modulation technique; narrowband digital land mobile radio; superframe structure; transmission format; transmission modes; voice coding; Baseband; Channel spacing; Code standards; Communication channels; Error correction; Frequency; Interleaved codes; Land mobile radio; Narrowband; US Government;
Conference_Titel :
Military Communications Conference, 1990. MILCOM '90, Conference Record, A New Era. 1990 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/MILCOM.1990.117468
