Adaptive channel delays selection for WCDMA mobile system

Author

Bejjani, Elie ; Bouquier, J.-F. ; de Cacqueray, Benoît

Author_Institution

Corp. Res. Centre, Alcatel, Nanterre, France

Volume

1

fYear

1999

fDate

1999

Firstpage

203

Abstract

Reliable path selection is a crucial operation prior to RAKE combining in WCDMA. We propose a new adaptive method for path delays selection based on the computation of a dynamic threshold. By computing a power versus delay profile and excluding all the peaks that probably correspond to channel taps, the remaining noise-only samples are statistically modeled. The statistical parameters of the noise/interference are then used to set the tap selection threshold. As a consequence, we ensure that the threshold varies according to the interference level, and therefore the path selection procedure is made more reliable

Keywords

adaptive systems; broadband networks; code division multiple access; delays; land mobile radio; multiuser channels; radio networks; radio receivers; radiofrequency interference; statistical analysis; RAKE combining; RAKE receiver; UMTS Terrestrial Radio Access; UTRA; WCDMA mobile system; adaptive channel delays selection; channel taps; delay profile; dynamic threshold; instantaneous power profile; interference level; noise-only samples; noise/interference; radio interfaces; reliable path selection; statistical model; statistical parameters; tap selection threshold; Channel estimation; Delay; Diversity reception; Interference; Multiaccess communication; Multipath channels; Neodymium; Power control; Power system reliability; Speech;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.797111

Filename

797111