Enhanced coherent delay tracking for direct sequence spread spectrum systems

Author

Boujemaa, Hatem ; Siala, Mohamed

Author_Institution

CNET, Issy-les-Moulineaux, France

Volume

1

fYear

2000

fDate

36770

Firstpage

274

Abstract

An enhanced coherent delay lock loop (DLL) is proposed for code tracking in direct sequence spread spectrum systems on multipath fading channels. By normalising the estimated tracking error for large values of the power of the tracked path, the proposed loop reduces most of the degradation caused by fading. Moreover, by subtracting an estimation of the multipath bias from the output of the coherent DLL, this enhanced scheme reduces most of the degradation caused by multipath interference

Keywords

delay lock loops; fading channels; land mobile radio; multipath channels; radio tracking; radiofrequency interference; spread spectrum communication; DS-SS systems; UMTS FDD mode specifications; code tracking; coherent DLL; coherent delay lock loop; coherent delay tracking; direct sequence spread spectrum systems; multipath bias estimation; multipath fading channels; multipath interference; normalised estimated tracking error; Bit error rate; Degradation; Delay; Electronic mail; Fading; Filters; Interference cancellation; Spread spectrum communication; Telecommunications; Tracking loops;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on

Conference_Location

Parsippany, NJ

Print_ISBN

0-7803-6560-7

Type

conf

DOI

10.1109/ISSSTA.2000.878127

Filename

878127