Mean Time to Lose Lock for a Coherent Second-Order PN-Code Tracking Loop—The Singular Perturbation Approach

Arnold L. Welti, Ben Zion Bobrovsky

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

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 Doppler rate is studied, and optimal loop parameters (namely, 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.

Original languageEnglish
Pages (from-to)809-818
Number of pages10
JournalIEEE Journal on Selected Areas in Communications
Volume8
Issue number5
DOIs
StatePublished - Jun 1990

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