Tracking Biases Caused by Imperfections in DLL Receivers

Abstract

Delay Lock Loop (DLL) is a feedback system that is able to track the code phase of a pseudo-noise (PN) signal. Imperfections in the DLL or the RF front end may or may not lead to tracking biases, which have to be removed by a receiver-specific calibration factor. The goal of this work is to show that also imperfections (spectral asymmetry of the signal, carrier-phase imbalance of the DLL), which do not change the code phase, can result in significant biases when both effects are combined.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2009
Accession Number
ADA517966

Entities

People

  • Gerhard Hejc
  • Wolfgang Schaefer

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Artificial Satellites
  • Asymmetry
  • Bandpass Filters
  • Calibration
  • Carrier Frequencies
  • Closed Loop Systems
  • Communication Satellites
  • Correlators
  • Crossings
  • Filters
  • Frequency
  • Information Operations
  • Intervals
  • Phase
  • Phase Measurement
  • Time Intervals

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.
  • Radio communications and signal processing.