Improved MUSIC algorithm for estimation of time delays in asynchronous DS-CDMA systems

Author

Ostman, Thomas ; Parkvall, Stefan ; Ottersten, Björn

Author_Institution

Dept. of Signal, Sensors & Syst., R. Inst. of Technol., Stockholm, Sweden

Volume

1

fYear

1997

fDate

2-5 Nov. 1997

Firstpage

838

Abstract

An algorithm for time delay estimation in an asynchronous direct-sequence code-division multiple access (DS-CDMA) system which exploits the structure of the system better than previously known algorithms, is presented. The different algorithms are compared through simulation and asymptotic analysis (large number of vector samples). For a typical scenario it is shown that the proposed algorithm decreases the standard deviation of the time delay errors with a factor of approximately 2.

Keywords

code division multiple access; covariance matrices; delays; parameter estimation; pseudonoise codes; signal sampling; spread spectrum communication; MUSIC algorithm; algorithm; asymptotic analysis; asynchronous DS-CDMA systems; covariance matrix; direct-sequence code-division multiple access; simulation; standard deviation; time delay errors; time delay estimation; vector samples; Algorithm design and analysis; Analytical models; Covariance matrix; Delay effects; Delay estimation; Direct-sequence code-division multiple access; Filters; Multiaccess communication; Multiple signal classification; Sensor systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-8186-8316-3

Type

conf

DOI

10.1109/ACSSC.1997.680561

Filename

680561