Acquisition of weak signals in multi-constellation frequency domain receivers.

DC FieldValueLanguage
dc.contributor.authorMollaiyan, Kaveh-
dc.contributor.authorSanterre, Rock-
dc.contributor.authorLandry, René Jr.-
dc.date.accessioned2016-11-14T18:41:22Z-
dc.date.available2016-11-14T18:41:22Z-
dc.date.issued2013-05-01-
dc.identifier.issn2150-850Xfr_CA
dc.identifier.urihttp://hdl.handle.net/20.500.11794/12151-
dc.description.abstractNew positioning applications’ availability requirements demand receivers with higher sensitivities and ability to process multiple GNSS signals. Possible applications include acquiring one signal per GNSS constellation in the same frequency band and combining them for increased sensitivity or predicting acquisition of other signals. Frequency domain processing can be used for this purpose, since it benefits from parallel processing capabilities of Fast Fourier Transform (FFT), which can be efficiently implemented in software receivers. On the other hand, long coherent integration times are mainly limited due to large FFT size in receivers using frequency domain techniques. A new method is proposed to address the problems in frequency domain receivers without compromising the resources and execution time. A pre-correlation accumulation (PCA) is proposed to partition the received samples into one-code-period blocks, and to sum them together. As a result, the noise is averaged out and the correlation results will gain more power, provided that the relative phase between the data segments is compensated for. In addition to simplicity, the proposed PCA method enables the use of one-size FFT for all integration times. A post-correlation peak combination is also proposed to remove the need for double buffering. The proposed methods are implemented in a configurable Simulink model, developed for acquiring recorded GNSS signals. For weak signal scenarios, a Spirent GPS simulator is used as a source. Acquisition results for GPS L1 C/A and GLONASS L1OF are shown and the performance of the proposed technique is discussed. The proposed techniques target GNSS receivers using frequency domain processing aiming at accommodating all the GNSS signals, while minimizing resource usage. They also apply to weak signal acquisition in frequency domain to answer the availability demand of today’s GNSS positioning applications.fr_CA
dc.languageengfr_CA
dc.publisherScientific Research Pub.fr_CA
dc.subjectFFT acquisitionfr_CA
dc.subjectFrequency domain receiverfr_CA
dc.subjectWeak signalfr_CA
dc.subjectMulti-constellationfr_CA
dc.titleAcquisition of weak signals in multi-constellation frequency domain receivers.fr_CA
dc.typeCOAR1_1::Texte::Périodique::Revue::Contribution à un journal::Article::Article de recherche-
dcterms.bibliographicCitationPositioning, Vol. 04 (02), 144–152 (2013)fr_CA
dc.audienceProfesseurs (Enseignement supérieur)fr_CA
dc.audienceÉtudiantsfr_CA
dc.audienceDoctorantsfr_CA
dc.audienceIngénieurs des télécommunicationsfr_CA
dc.identifier.doi10.4236/pos.2013.42014fr_CA
dc.subject.rvmGPSfr_CA
dc.subject.rvmTransformations de Fourier rapidesfr_CA
dc.subject.rvmRécepteurs GPSfr_CA
dc.subject.rvmRadiofréquencesfr_CA
rioxxterms.versionVersion of Recordfr_CA
rioxxterms.version_of_recordhttps://doi.org/10.4236/pos.2013.42014fr_CA
rioxxterms.project.funder_namefqrfr_CA
bul.rights.periodeEmbargo0 moisfr_CA
Collection:Articles publiés dans des revues avec comité de lecture

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