A preventative approach to mitigating CW interference in GPS receivers Balaei, Asghar en_US Motella, Beatrice en_US Dempster, Andrew en_US 2021-11-25T15:20:15Z 2021-11-25T15:20:15Z 2008 en_US
dc.description.abstract In the global positioning system (GPS), code division multiple access (CDMA) signals are used. Because of the known spectral characteristics of the CDMA signal, continuous wave (CW) interference has a predictable effect on the different pseudo random noise (PRN) spreading codes (unique to each satellite) depending on the Doppler frequency of the signal. The Doppler frequency for each signal is also predictable once the receiver position is known. As different satellite signals have different Doppler frequencies, the effect on the signal quality is also different. In this paper first the effect is studied analytically. The concept of an `exclusion zone` is defined and analyzed for each satellite. This exclusion zone, where that satellite should not be used due to interference degradation, is shown to be predictable for each satellite as a function of time. Using this prediction, the CW interference effect on the positioning quality of the receiver can be mitigated by ignoring the affected satellites within exclusion zones when performing position evaluation. The threshold beyond which a satellite should be excluded is then derived by studying the mutual effects of the geometry and the signal quality of that satellite on the positioning quality. Receiver autonomous integrity monitoring (RAIM) uses redundancy in measurements to perform an internal consistency check to see if all of the measurements are satisfactory. In this paper this technique is also used to mitigate the effect of CW interference on the positioning accuracy. Finally it is shown that the prediction of the exclusion zone for each satellite outperforms the RAIM algorithm in mitigation the effect of the interference when 5 satellites are visible. © 2007 Springer-Verlag. en_US
dc.identifier.issn 1080-5370 en_US
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.subject.other Algorithm en_US
dc.subject.other Geometry en_US
dc.subject.other GPS en_US
dc.subject.other Signal en_US
dc.title A preventative approach to mitigating CW interference in GPS receivers en_US
dc.type Journal Article en
dcterms.accessRights open access
dspace.entity.type Publication en_US
unsw.description.publisherStatement The original publication is available at en_US
unsw.identifier.doiPublisher en_US
unsw.relation.faculty Engineering
unsw.relation.ispartofissue 3 en_US
unsw.relation.ispartofjournal GPS Solutions en_US
unsw.relation.ispartofpagefrompageto 199-209 en_US
unsw.relation.ispartofvolume 12 en_US
unsw.relation.originalPublicationAffiliation Balaei, Asghar, Surveying & Spatial Information Systems, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Motella, Beatrice en_US
unsw.relation.originalPublicationAffiliation Dempster, Andrew, Surveying & Spatial Information Systems, Faculty of Engineering, UNSW en_US School of Civil and Environmental Engineering *
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
921.56 KB
Resource type