Multiuser detection for multiple-access communications using wavelet-packet transforms

Author

Wang, X.F. ; Lu, W.-S. ; Antoniou, A.

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

2

fYear

1997

fDate

20-22 Aug 1997

Firstpage

607

Abstract

A wavelet-packet-based alternating projection joint detector (WPAPJD) for over-saturated multiple-access systems is proposed. By exploiting the structure of the multiple-access interference (MAI) associated with the wavelet packets used, the MAI seen by each user can only occur within a small-size subgroup of users. Further, MAI is reduced by using an APJD as applied to the subgroup. In comparison with a refined multistage joint detector, simulation studies show that our proposed method offers improved bit-error rate (BER) with reduced computational complexity in applications where a signal-to-noise ratio less than 16 dB is acceptable

Keywords

code division multiple access; computational complexity; error statistics; pseudonoise codes; radiofrequency interference; signal detection; spread spectrum communication; wavelet transforms; BER; DS-CDMA; MAI; SNR; alternating projection joint detector; bit error rate; computational complexity reduction; direct sequence code division multiple access; multiple access communications; multiple access interference; multistage joint detector; multiuser detection; signal to noise ratio; simulation; wavelet packet transforms; Binary trees; Bit error rate; Detectors; Multiple access interference; Multiuser detection; Sufficient conditions; Throughput; Time frequency analysis; Wavelet packets; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-3905-3

Type

conf

DOI

10.1109/PACRIM.1997.620336

Filename

620336