Near far robust time delay estimation for asynchronous DS-CDMA systems with bandlimited pulse shapes

Author

Östman, Thomas ; Ottersten, Bjom

Author_Institution

Signal Process., R. Inst. of Technol., Stockholm, Sweden

Volume

2

fYear

1998

fDate

18-21 May 1998

Firstpage

1650

Abstract

An algorithm for time delay estimation in an asynchronous direct-sequence code-division multiple access (DS-CDMA) system with bandlimited signals in a near-far scenario (no tight power control) is presented. The algorithm, which is a modified MUSIC algorithm, is validated through simulations and asymptotic analysis (large number of vector samples) for a square-root raised cosine pulse. It is shown that the algorithm has performance very similar to the case with rectangular pulses and hence it is near-far resistant

Keywords

array signal processing; bandlimited signals; code division multiple access; delay estimation; spread spectrum communication; asynchronous DS-CDMA systems; bandlimited pulse shapes; bandlimited signals; direct-sequence code-division multiple access system; modified MUSIC algorithm; near far robust time delay estimation; near-far resistant algorithm; square-root raised cosine pulse; Delay effects; Delay estimation; Direct-sequence code-division multiple access; Multiaccess communication; Multiple signal classification; Power control; Pulse shaping methods; Robustness; Shape; Signal processing algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1998. VTC 98. 48th IEEE

Conference_Location

Ottawa, Ont.

ISSN

1090-3038

Print_ISBN

0-7803-4320-4

Type

conf

DOI

10.1109/VETEC.1998.686570

Filename

686570