Title :
Wideband multi-rate DS-CDMA for next generation mobile communications systems
Author :
Adachi, F. ; Sawahashi, M.
Author_Institution :
NTT Mobile Commun. Network Inc., Yokosuka, Japan
Abstract :
The design concept of wideband multi-rate DS-CDMA (W-CDMA) that can support various services with different data rates and also flexible system deployment is presented. It is characterized by asynchronous cell site operation with fast cell search algorithm, pilot symbol assisted coherent reverse/forward links, and forward links that use tree-structured orthogonal multi-spreading factor (SF) codes. Adaptive antenna array diversity and interference canceller are designed to further enhance the transmission quality and increase the link capacity. Field experiments including 2 Mbps transmission are also presented
Keywords :
adaptive antenna arrays; broadband networks; cellular radio; channel capacity; diversity reception; interference suppression; land mobile radio; pseudonoise codes; radio links; radio networks; radiofrequency interference; search problems; spread spectrum communication; 2 Mbit/s; adaptive antenna array diversity; asynchronous cell site operation; data rates; fast cell search algorithm; field experiments; forward links; interference canceller; link capacity; mobile communications systems; pilot symbol assisted coherent links; reverse links; system deployment; transmission quality; tree-structured orthogonal multispreading factor codes; wideband multirate DS-CDMA; Adaptive arrays; Antenna arrays; Electronic mail; Fading; Interference cancellation; Mobile communication; Modems; Multiaccess communication; Radio link; Wideband;
Conference_Titel :
Wireless Communications Conference, 1997., Proceedings
Conference_Location :
Boulder, CO
Print_ISBN :
0-7803-4194-5
DOI :
10.1109/WCC.1997.622247
