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An Indoor Airborne Ultrasonic Wireless Communication Network
There is an increasing interest in the use of modulated airborne ultrasound as a means of indoor wireless communication. By using commercially available capacitive ultrasonic transducers at 50 kHz, this paper describes the successful practical implementation of a prototype airborne ultrasonic commun...
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Published in: | IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2018-08, Vol.65 (8), p.1452-1459 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | There is an increasing interest in the use of modulated airborne ultrasound as a means of indoor wireless communication. By using commercially available capacitive ultrasonic transducers at 50 kHz, this paper describes the successful practical implementation of a prototype airborne ultrasonic communication network with ceiling-mounted base stations (BSs) and a mobile transceiver unit. An asynchronous ultrasonic location technique using Gold code-modulated ranging signals was chosen to optimize the modulation schemes and data transfer and offered automatic handover between different cell regions on a switch ON and OFF basis as all BSs used the same frequency bands for data transmission. The 16-quadrature amplitude modulation (QAM) based on orthogonal frequency division multiplexing (OFDM) was used to achieve an uplink data transfer rate of 37.4 kb/s, whereas the range was extended by using quadrature phase-shift keying (QPSK)-OFDM with a data rate of 18.7 kb/s. For the uplink connection, the achieved data rates using 16-QAM-OFDM and QPSK-OFDM were 36.1 and 18.1 kb/s, respectively. A more robust handover technique using received signal strength with hysteresis was also proposed to improve system efficiency when multiple mobile receivers used the service. |
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ISSN: | 0885-3010 1525-8955 |
DOI: | 10.1109/TUFFC.2018.2841501 |