Title :
Digital cellular systems for North America
Author :
Sundberg, C.-E.W. ; Seshadri, N.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
Standards for a new cellular mobile radio system for North America are currently being defined. The system will use digital transmission in contrast to the present analog system. Capacity is increased by means of three techniques. These are: sending three digital voice channels in one current analog FM channel (maintaining spectral compatibility), increased trunking efficiency, and exploiting improved frequency reuse offered by robust digital transmission techniques. The main elements of the system, such as multiple access digital modulation, speech coding, channel coding, and equalization, are briefly discussed. The North American system is compared to the pan-European digital GSM (Groupe Speciale Mobile) system, and techniques that may be used to further improve the system capacity of future digital cellular systems beyond the current standard are discussed
Keywords :
cellular radio; digital radio systems; encoding; equalisers; speech analysis and processing; standards; time division multiple access; GSM; Groupe Speciale Mobile; North America; TDMA; analog FM channel; cellular mobile radio; channel coding; digital modulation; digital transmission; digital voice channels; equalization; frequency reuse; increased trunking efficiency; spectral compatibility; speech coding; system capacity; time division multiple access; Channel coding; Digital modulation; Europe; Frequency modulation; GSM; Land mobile radio; North America; Radio spectrum management; Speech coding; Time division multiple access;
Conference_Titel :
Global Telecommunications Conference, 1990, and Exhibition. 'Communications: Connecting the Future', GLOBECOM '90., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-87942-632-2
DOI :
10.1109/GLOCOM.1990.116568
