Title :
A novel IS-95 CDMA mobile station receiver structure with smart antenna canceller
Author :
Ye, Weichen ; Bar-Ness, Yeheskel ; Haimovich, Alexander M.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
The capacity of wireless CDMA systems in the forward link is limited by both intra-cell and inter-cell cochannel interferences. In particular, when the mobile station is close to a cell boundary, the desired signal is disturbed by relatively strong interference from neighboring base stations. In this paper, a receiver architecture with smart antenna followed by a RAKE demodulator is suggested at a IS-95 CDMA mobile station for interference suppression and diversity combining. Such a structure can work well only when the channel vector of desired signal is correctly estimated. We use the identifying spreading codes (as in IS-95 for example) to provide and adaptively correct a channel vector estimate, suppress cochannel interference, hence improve the system capacity
Keywords :
adaptive antenna arrays; cellular radio; cochannel interference; code division multiple access; diversity reception; interference suppression; mobile antennas; radio receivers; IS-95 CDMA mobile station receiver structure; RAKE demodulator; capacity; cell boundary; channel vector; channel vector estimate; diversity combining; forward link; inter-cell cochannel interference; interference suppression; intra-cell cochannel interference; mobile station; neighboring base stations; receiver architecture; smart antenna canceller; spreading codes; wireless CDMA systems; Antenna arrays; Base stations; Demodulation; Diversity reception; Interference suppression; Mobile antennas; Multiaccess communication; RAKE receivers; Receiving antennas; Signal to noise ratio;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.734701
