Title :
Integrated voice-data communications over narrowband PMR channels
Author :
Madungwe, G. ; Takawira, I.
Author_Institution :
IEEE Spectrum, New York, NY, USA
Abstract :
The use of narrowband PMR channels for voice and data transmission is becoming attractive as spectral constraints and demand for mobile services continues to increase. The technology, in terms of channel utilisation, keeps on improving and efficient modulation techniques continually increase the data rates possible on such channels. Most mobile applications still employ speech transmission, hence it is necessary to encode speech in a way that uses as little spectrum as possible. Improved speech coding techniques are making toll quality voice transmission possible at 2.4 kbps
Keywords :
digital radio; integrated voice/data communication; mobile radio; packet radio networks; speech coding; telecommunication channels; 2.4 kbit/s; channel utilisation; data rates; efficient modulation techniques; integrated voice-data communications; mobile services; narrowband PMR channels; packet radio network; speech coding techniques; speech transmission; toll quality voice transmission; Access protocols; Bandwidth; Channel capacity; Data communication; Land mobile radio; Mobile communication; Narrowband; Packet switching; Speech; Switching circuits;
Conference_Titel :
Communications and Signal Processing, 1998. COMSIG '98. Proceedings of the 1998 South African Symposium on
Conference_Location :
Rondebosch
Print_ISBN :
0-7803-5054-5
DOI :
10.1109/COMSIG.1998.736912
