Acoustic Indoor Localization System Integrating TDMA+FDMA Transmission Scheme and Positioning Correction Technique
This paper presents a novel audio indoor localization system. In the proposed system, four speakers placed at known positions transmit chirp signals according to the time-division multiple access (TDMA) plus frequency-division multiple access (FDMA) transmission scheme. A smartphone receives the signal via a built-in microphone and calculates the time differences of arrival (TDOAs). Using TDOA measurements, the position is estimated by the shrinking-circle method. In particular, to reduce the positioning error in moving conditions, a TDOA correction method based on Doppler shifts is proposed. The performance of the proposed system was evaluated in real-world experiments using a 10.971 m × 5.684 m positioning area. The results of the static-target positioning experiment showed that the TDMA+FDMA transmission scheme has more advantages in improving the update rate of the positioning system than the TDMA-only transmission scheme. The results of the moving-target positioning experiment under three different speeds demonstrated that the positioning errors were reduced by about 10 cm when the Doppler-shift-based TDOA correction method was adopted. This research provides a possible framework for the realization of a TDOA-chirp-based acoustic indoor positioning system with high positioning accuracy and update rate.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:19 |
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| Enthalten in: |
Sensors (Basel, Switzerland) - 19(2019), 10 vom: 22. Mai |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Chen, Xiang [VerfasserIn] |
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| Links: |
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| Themen: |
Chirp signal |
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| Anmerkungen: |
Date Revised 25.02.2020 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.3390/s19102353 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM297400983 |
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| 100 | 1 | |a Chen, Xiang |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Acoustic Indoor Localization System Integrating TDMA+FDMA Transmission Scheme and Positioning Correction Technique |
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| 500 | |a Date Revised 25.02.2020 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a This paper presents a novel audio indoor localization system. In the proposed system, four speakers placed at known positions transmit chirp signals according to the time-division multiple access (TDMA) plus frequency-division multiple access (FDMA) transmission scheme. A smartphone receives the signal via a built-in microphone and calculates the time differences of arrival (TDOAs). Using TDOA measurements, the position is estimated by the shrinking-circle method. In particular, to reduce the positioning error in moving conditions, a TDOA correction method based on Doppler shifts is proposed. The performance of the proposed system was evaluated in real-world experiments using a 10.971 m × 5.684 m positioning area. The results of the static-target positioning experiment showed that the TDMA+FDMA transmission scheme has more advantages in improving the update rate of the positioning system than the TDMA-only transmission scheme. The results of the moving-target positioning experiment under three different speeds demonstrated that the positioning errors were reduced by about 10 cm when the Doppler-shift-based TDOA correction method was adopted. This research provides a possible framework for the realization of a TDOA-chirp-based acoustic indoor positioning system with high positioning accuracy and update rate | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Chirp signal | |
| 650 | 4 | |a Doppler shifts | |
| 650 | 4 | |a Indoor localization | |
| 650 | 4 | |a TDMA+FDMA | |
| 650 | 4 | |a TDOA | |
| 700 | 1 | |a Chen, Yuheng |e verfasserin |4 aut | |
| 700 | 1 | |a Cao, Shuai |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Lei |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Xu |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Xun |e verfasserin |4 aut | |
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| 856 | 4 | 0 | |u http://dx.doi.org/10.3390/s19102353 |3 Volltext |
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