Title :
Link adaptation to channel interference using multi-rate source and channel coding for CDMA mobile communications
Author :
Tateesh, S. ; Atungsiri, S. ; Kondoz, A.M.
Author_Institution :
CCSR, Surrey Univ., Guildford, UK
Abstract :
This paper investigates the benefits of link adaptation according to the propagation conditions using multi-rate vocoders and channel coders. A multi-rate source and channel coding (MRC) system trades-off the source codec bit rate against channel codec bit rate according to the prevailing channel conditions. MRC systems continuously reconfigure transmission resources to optimally combat channel degradations and hence, maintain a reasonable quality of service even in marginal channel conditions. The aim is to maintain a satisfactory level of speech quality over a wide range of channel conditions with minimum resources. This paper shows the benefit of MRC system particularly in crowded cells of high channel interference
Keywords :
cellular radio; channel coding; code division multiple access; land mobile radio; radiofrequency interference; source coding; speech codecs; speech coding; vocoders; CDMA; cellular radio; channel codec bit rate; channel interference; crowded cells; link adaptation; marginal channel conditions; mobile communications; multi-rate source/channel coding; multi-rate vocoders; propagation conditions; quality of service; source codec bit rate; speech quality; Bit rate; Channel coding; Degradation; Forward error correction; Interference; Mobile communication; Multiaccess communication; Quality of service; Speech codecs; Speech coding;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599586
