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Orthogonal chirp-based ultrasonic positioning

journal contribution
posted on 27.10.2020, 00:00 by Mohammad Khyam, SS Ge, X Li, M Pickering
This paper presents a chirp based ultrasonic positioning system (UPS) using orthogonal chirp waveforms. In the proposed method, multiple transmitters can simultaneously transmit chirp signals, as a result, it can efficiently utilize the entire available frequency spectrum. The fundamental idea behind the proposed multiple access scheme is to utilize the oversampling methodology of orthogonal frequency-division multiplexing (OFDM) modulation and orthogonality of the discrete frequency components of a chirp waveform. In addition, the proposed orthogonal chirp waveforms also have all the advantages of a classical chirp waveform. Firstly, the performance of the waveforms is investigated through correlation analysis and then, in an indoor environment, evaluated through simulations and experiments for ultrasonic (US) positioning. For an operational range of approximately 1000 mm, the positioning root-mean-square-errors (RMSEs) &90% error were 4.54 mm and 6.68 mm respectively.

History

Volume

17

Issue

5

Start Page

1

End Page

14

Number of Pages

14

eISSN

1424-8220

Publisher

MDPI AG

Additional Rights

CC BY 4.0

Peer Reviewed

Yes

Open Access

Yes

Acceptance Date

24/04/2017

External Author Affiliations

University of New South Wales; National University of Singapore

Era Eligible

Yes

Journal

Sensors (Switzerland)

Licence

Exports

CQUniversity

Licence

Exports