Title :
Wideband CDMA system
Author :
Fukasawa, Atsushi ; Sato, Takuro ; Takizawa, Yumi ; Fisher, Reed E. ; Kato, Toshio ; Kawabe, Manabu
Author_Institution :
R&D Div., Oki Electr. Ind. Co. Ltd., Tokyo, Japan
Abstract :
This paper describes a wideband-spread code division multiple access (W-CDMA) system for high capacity and high quality personal radio communication. This system has been authorized as an EIA/TIA Interim Standard IS-665 and ITU-R Recommendation M.1073. The system uses coherent detection (CD) to increase system capacity. An interference canceller (IC) has been given to enhance the capacity. CD and IC have been in practice by using continuous pilot signals in forward/reverse links. PN and Hadamard sequences are used as the spreading code for minimal mutual interference among traffic and pilot/sync/paging channels. A 32 kbit/s robust waveform speech coder COM101+ has been developed to achieve toll quality speech in the radio environment
Keywords :
broadband networks; code division multiple access; interference suppression; land mobile radio; personal communication networks; pseudonoise codes; radiofrequency interference; sequences; signal detection; speech coding; spread spectrum communication; telecommunication standards; 32 kbit/s; 32 kbit/s robust waveform speech coder; COM101+; EIA/TIA Interim Standard IS-665; Hadamard sequences; ITU-R Recommendation M.1073; PN Hadamard sequence; W-CDMA; coherent detection; continuous pilot signals; forward links; high capacity high quality personal radio communication; interference canceller; minimal mutual interference; paging channels; pilot channels; reverse links; sync channel; system capacity; toll quality speech; traffic; wideband-spread code division multiple access; Authentication; Error correction; Error correction codes; Interference cancellation; Multiaccess communication; Radio communication; Research and development; Speech enhancement; Spread spectrum communication; Wideband;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563779
