A recent subspace-based approach to joint detection and time-delay estimation in DS-CDMA systems

Author

Ranheim, Anders

Author_Institution

Dept. of Appl. Electron., Chalmers Univ. of Technol., Goteborg, Sweden

Volume

6

fYear

1998

fDate

12-15 May 1998

Firstpage

3213

Abstract

This paper presents a novel method for jointly estimating the time-delay parameters and detecting the transmitted symbols in a DS-CDMA system. A short training sequence is used to get an initial estimate of the time-delay, which is consequently used to detect the symbols. The method then iterates while exploiting the signal structure, to improve the performance. Simulation results are presented to compare the algorithm with the decorrelating criterion and the matched-filter receiver in terms of bit-error rate, and with the MUSIC algorithm and the sliding correlator in terms of the variance of the time-delay estimates

Keywords

code division multiple access; delays; error statistics; parameter estimation; pseudonoise codes; signal detection; spread spectrum communication; DS-CDMA systems; MUSIC algorithm; bit-error rate; codes sequences; decorrelating criterion; initial estimate; joint detection; matched-filter receiver; performance; short training sequence; signal structure; simulation results; sliding correlator; subspace-based approach; time-delay estimates variance; time-delay estimation; time-delay parameters; transmitted symbols detection; Baseband; Bit error rate; Correlators; Decorrelation; Delay effects; Frequency division multiaccess; Multiaccess communication; Multiple signal classification; Parameter estimation; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on

Conference_Location

Seattle, WA

ISSN

1520-6149

Print_ISBN

0-7803-4428-6

Type

conf

DOI

10.1109/ICASSP.1998.679548

Filename

679548