Performance of a digital code tracking loop for DSSS systems in the presence of Doppler shift

Author

Guo, J. ; Hu, X. ; Vucetic, B.

Author_Institution

Commun. Dept., State Power Corp. of China, Nanjing, China

Volume

150

Issue

3

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

202

Lastpage

206

Abstract

The authors present a low-complexity non-coherent tracking loop based on the gravity of energy window (GEW). Expressions for the proposed tracking loop in a multipath fading channel with Doppler shift environment are derived. The stationary probability density function (PDF) of the phase error and the root-mean-square (RMS) tracking error are obtained by computer simulation. Statistical simulation results show that the new tracking loop can provide much better performance than the conventional non-coherent delay lock loop (DLL) in the presence of Doppler shift.

Keywords

delay lock loops; fading channels; land mobile radio; multipath channels; probability; radio tracking; spread spectrum communication; DLL; DSSS systems; Doppler shift; PDF; RMS tracking error; computer simulation; digital code tracking loop; direct-sequence spread-spectrum; gravity of energy window; local codes; low-complexity noncoherent tracking loop; mobile communication systems; multipath fading channel; noncoherent delay lock loop; phase error; root-mean-square tracking error; stationary probability density function; statistical simulation results;

fLanguage

English

Journal_Title

Communications, IEE Proceedings-

Publisher

iet

ISSN

1350-2425

Type

jour

DOI

10.1049/ip-com:20030355

Filename

1214612