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Measuring Time-of-Flight in an Ultrasonic LPS System Using Generalized Cross-Correlation

Villadangos, José Manuel et al · Molecular Diversity Preservation International · 2011

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Author / responsible party
Villadangos, José Manuel et al
Publisher
Molecular Diversity Preservation International
Year
2011
ISSN
1424-8220
ISSN
1424-8220
Language
English

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In this article, a time-of-flight detection technique in the frequency domain is described for an ultrasonic Local Positioning System (LPS) based on encoded beacons. Beacon transmissions have been synchronized and become simultaneous by means of the DS-CDMA (Direct-Sequence Code Division Multiple Access) technique. Every beacon has been associated to a 255-bit Kasami code. The detection of signal arrival instant at the receiver, from which the distance to each beacon can be obtained, is based on the application of the Generalized Cross-Correlation (GCC), by using the cross-spectral density between the received signal and the sequence to be detected. Prior filtering to enhance the frequency components around the carrier frequency (40 kHz) has improved estimations when obtaining the correlation function maximum, which implies an improvement in distance measurement precision. Positioning has been achieved by using hyperbolic trilateration, based on the Time Differences of Arrival (TDOA) between a reference beacon and the others. Fil: Villadangos, José Manuel. Universidad de Alcalá; España Fil: Ureña, Jesús. Universidad de Alcalá; España

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APA 7

Villadangos, J. M. E. A. (2011). Measuring Time-of-Flight in an Ultrasonic LPS System Using Generalized Cross-Correlation. http://hdl.handle.net/11336/82204

MLA

Villadangos, José Manuel et al. "Measuring Time-of-Flight in an Ultrasonic LPS System Using Generalized Cross-Correlation." 2011. http://hdl.handle.net/11336/82204.

Chicago

Villadangos, José Manuel et al. 2011. "Measuring Time-of-Flight in an Ultrasonic LPS System Using Generalized Cross-Correlation.". http://hdl.handle.net/11336/82204.

Harvard

Villadangos, J. M. E. A. 2011, Measuring Time-of-Flight in an Ultrasonic LPS System Using Generalized Cross-Correlation, Molecular Diversity Preservation International, available at: http://hdl.handle.net/11336/82204 [Accessed 8 Aug. 2026].

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Title
Measuring Time-of-Flight in an Ultrasonic LPS System Using Generalized Cross-Correlation
Author / contributors
Villadangos, José Manuel et al
Publisher
Molecular Diversity Preservation International
Publication year
2011
ISSN
1424-8220
ISSN
1424-8220
Language
English

Subjects

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GENERALIZED CROSS-CORRELATION; ULTRASONIC LPS; PHASE TRANSFORM; KASAMI CODES; https://purl.org/becyt/ford/2.2; https://purl.org/becyt/ford/2
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