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Orthogonal chirp-based ultrasonic positioning

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Version 2 2022-08-30, 23:49
Version 1 2020-10-27, 00:00
journal contribution
posted on 2022-08-30, 23:49 authored by Mohammad KhyamMohammad 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

2017-04-24

External Author Affiliations

University of New South Wales; National University of Singapore

Era Eligible

  • Yes

Journal

Sensors (Switzerland)

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