Title :
Microcellular CDMA system with a linear multiuser interference canceler
Author :
Kajiwara, Akihiro ; Nakagawa, Masao
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada
fDate :
5/1/1994 12:00:00 AM
Abstract :
In the paper, the authors suggest an asynchronous microcellular CDMA system with a matrix-based multiuser interference canceler for the reverse link, in which multiuser interference is completely removed on a symbol-by-symbol basis. The linear interference cancellation scheme, whose matrix order is equal to the number of active users, does not require knowledge of their received power levels, thereby resulting in high capacity and near/far resistance. In the paper, the influence of surrounding cell interference on a given base station receiver for various propagation path loss models is also analyzed and then the system performance is investigated theoretically. Provided the normalized capacity is defined by a required SNR (=Eb/N0 ) of 7 dB at the binary DPSK detector, the CDMA system can provide capacity per cell of 46~54%
Keywords :
cellular radio; code division multiple access; interference suppression; radiofrequency interference; base station receiver; binary DPSK detector; capacity; linear multiuser interference canceler; matrix order; matrix-based multiuser interference canceler; microcellular CDMA system; propagation path loss models; reverse link; surrounding cell interference; system performance; Base stations; Code division multiplexing; Computational complexity; Detectors; Interference cancellation; Maximum likelihood estimation; Multiaccess communication; Performance analysis; Propagation delay; Propagation losses;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
