Title :
A co-channel interference and nonlinear distortion cancellation for DS/CDMA in optical link
Author :
Huang, Wei ; Sourour, Essam A. ; Nakagawa, Masao
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
A multi-stage cancellation technique is proposed to cancel co-channel interference and nonlinear distortion of microcellular radio CDMA (CDMA) optical access network. A radio CDMA optical access is a network access technique which uses microcellular radio CDMA signals in wireless channel and connects the base stations and central stations (CS) through optical transmission. In such system, co-channel interference from channel multiple and nonlinear distortion due to laser diode nonlinearity limit the number of mobile CDMA channels. A multi-stage interference cancellation technique to cancel the co-channel interference and the nonlinear distortion is analyzed theoretically. A memoryless third-order polynomial memory is used to present the laser diode (LD) nonlinearity. The analytical method and its results are also applicable to other general nonlinear CDMA system
Keywords :
cellular radio; cochannel interference; code division multiple access; interference suppression; land mobile radio; memoryless systems; optical fibre subscriber loops; polynomials; pseudonoise codes; radiofrequency interference; semiconductor lasers; spread spectrum communication; telecommunication channels; DS/CDMA; base stations; central stations; cochannel interference cancellation; laser diode nonlinearity; memoryless third-order polynomial memory; microcellular radio CDMA; microcellular radio CDMA signals; mobile CDMA channels; multistage cancellation; network access technique; nonlinear CDMA system; nonlinear distortion; nonlinear distortion cancellation; optical access network; optical link; optical transmission; radio CDMA optical access; wireless channel; Base stations; Diode lasers; Interchannel interference; Interference cancellation; Multiaccess communication; Nonlinear distortion; Nonlinear optics; Optical distortion; Optical fiber networks; Polynomials;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563196
