Title :
Wavelet-packet-based signatures for asynchronous CDMA systems
Author :
Monera-Llorca, J. ; Lu, W.-S. ; Bhargava, J.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
A wavelet-packet-based family of user signatures for asynchronous CDMA systems is investigated. These signatures are of non-binary nature and are generated by the application of the inverse wavelet packet transform. Through numerical optimization, we obtain the wavelet filter which minimizes the crosscorrelation among signatures for different user configuration systems. The improvement in performance is especially notable in the oversaturated system scenario. Finally, we comment briefly on the topics of bandwidth efficiency, user privacy, and implementation
Keywords :
code division multiple access; data privacy; interference suppression; optimisation; wavelet transforms; asynchronous CDMA systems; bandwidth efficiency; crosscorrelation; implementation; inverse wavelet packet transform; numerical optimization; oversaturated system scenario; user configuration systems; user privacy; user signatures; wavelet filter; wavelet-packet-based signatures; Bandwidth; Degradation; Filters; Integrated circuit noise; Interference; Multiaccess communication; Privacy; Wavelet packets; Wavelet transforms; Wireless communication;
Conference_Titel :
Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-5582-2
DOI :
10.1109/PACRIM.1999.799585
