©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works 1 must be obtained from the IEEE.

GNSS Acquisition in Presence of Continuous Wave Interference
Daniele Borio1 , Member, IEEE,

Abstract The extreme weakness of a Global Navigation Satellite System (GNSS) signal makes it vulnerable to a wide variety of interfering signals, falling within the GNSS frequency bands. One of the main classes of these disturbing signals is represented by Continuous Wave Interferences (CWIs), that include all signals that can be effectively represented as pure sinusoids. This paper deals with the performance of GNSS signal acquisition in the presence of CWI. An original model describing the impact of CWI on signal acquisition is proposed and the expressions of both false alarm and detection probabilities are mathematically formulated and validated by Monte Carlo simulations. The paper also investigates the role of the interference amplitude and frequency along with the impact of different system parameters on the detection and false alarm probabilities.

Index Terms Signal detection, Continuous Wave Interference, CWI, Global Navigation Satellite System, GNSS, DSSS Acquisition.

I. I NTRODUCTION In recent years, detection theory has experienced a constant development, essentially motivated by its direct impact on radar applications: the availability of accurate models, quantifying the impact of clutter, allows one to control the probability of false alarm, to correctly set the detection threshold and to appropriately adjust different system parameters. The model describing signal detection in zero mean Gaussian noise [1] has been progressively extended to fluctuating targets [2] and in the presence of clutter [3]. Recently [4], [5]