A new Fuzzy Bandwidth Carrier Recovery System in GPS for Robust Phase Tracking
Resource
IEEE Signal Processing Letters 11 (4): 431-434
Journal
IEEE Signal Processing Letters
Journal Volume
11
Journal Issue
4
Pages
431-434
Date Issued
2004
Date
2004
Author(s)
Abstract
Fast carrier recovery loops are essential in high-dynamic global positioning system receivers. A new digital phase-locked loop (DPLL) system incorporating a fuzzy bandwidth controller (FBC) is presented in this letter. The FBC provides a time-varying bandwidth and adjusts the loop filter coefficients to improve DPLL tracking capability. When the phase error or phase difference error becomes large in the presence of significant accelerations, the loop bandwidth increases adaptively and performs rapid locking. Simulation results show that our receiver does achieve a superior performance over conventional tracking loops in terms of shorter settling time and wider frequency ramp range, while preventing the occurrence of cycle slipping.
Subjects
Carrier phase tracking; Cycle slipping; Digital phase-locked loop (DPLL); Fuzzy bandwidth controller (FBC); Global positioning system (GPS) receiver
Other Subjects
Computational complexity; Computer simulation; Doppler effect; Frequency synthesizers; Fuzzy control; Jamming; Light velocity; Mathematical models; Phase locked loops; White noise; Carrier phase tracking; Cycle slipping; Digital phase-locked loop; Fuzzy bandwidth carrier recovery system; Global positioning system
Type
journal article
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