DocumentCode
1381496
Title
Mean time to lose lock for a coherent second-order PN-code tracking loop-the singular perturbation approach
Author
Welti, Arnold L. ; Bobrovsky, Ben-Zion
Author_Institution
Swiss Federal Inst. of Technol., Zurich, Switzerland
Volume
8
Issue
5
fYear
1990
fDate
6/1/1990 12:00:00 AM
Firstpage
809
Lastpage
818
Abstract
The singular perturbation method is used to approximate the mean time to lose lock (MTLL) for a second-order coherent pseudonoise code tracking delay-lock loop (DLL). Approximate expressions for the MTLL are given. The influence of loop offset due to the Doppler rate is studied, and optimal loop parameters (natural frequency and damping factor) which maximize the MTLL are presented. Upper bounds to the maximum allowable Doppler rates for various operating conditions are given
Keywords
Doppler effect; perturbation techniques; spread spectrum communication; tracking; Doppler rate; damping factor; loop offset; mean time to lose lock; natural frequency; second-order coherent pseudonoise code; singular perturbation method; spread spectrum systems; tracking delay-lock loop; Additive noise; Damping; Delay effects; Delay estimation; Equations; Gaussian noise; Perturbation methods; Systems engineering and theory; Tracking loops; Upper bound;
fLanguage
English
Journal_Title
Selected Areas in Communications, IEEE Journal on
Publisher
ieee
ISSN
0733-8716
Type
jour
DOI
10.1109/49.56387
Filename
56387
Link To Document