Processing for Interference Suppression in GPS Receivers
Abstract
We examine the performance of the delay lock loops (DLL) in GPS receivers in the presence of non-Gaussian noise. interference and noise sources for GPS receivers may assume Gaussian or non-Gaussian distributions, specifically when operating inside buildings. Non-Gaussian noise may contaminate the GPS satellite signals and compromise the receiver delay lock loops (DLL), producing significant tracking errors. These sources include impulsive noise, ultra-wideband (UWB) signals, and noise radar signals for target tracking and through-the-wall imaging applications. We have considered non-Gaussian noise and examined its effect on GPS correlation and discriminator outputs for the commercial GPS using Coarse Acquisition (C/A) code. The discriminator tracking error variance is derived, incorporating the effect of noise, the front-end precorrelation filter, and the sampling rate. Further, interference suppression and multipath mitigation in Global Navigation Satellite Systems (GNSSs) is examined. A self-coherence anti-jamming scheme is introduced which relies on the uniclue structure of the coarse/acquisition (C/A) cede of the satellite signals.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 09, 2005
- Accession Number
- ADB312396
Entities
People
- Liyu Liu
- Moeness Amin
- Wei Sun
Organizations
- Villanova University