Acoustic Tag Identification Based on Noncoherent FSK Detection With Portable Devices

作者：Alvarez Fernando J^*; Aguilera Teodoro; Paredes Jose A; Moreno Jose A

来源：IEEE Transactions on Instrumentation and Measurement, 2018, 67(2): 270-278.

DOI：10.1109/TIM.2017.2777578

• Acoustic tag identification
• android-based platform
• noncoherent FSK detection
• portable device

This paper presents a tag identification system based on the detection of high-frequency acoustic signals by means of a portable device. A binary frequency shift keying-modulated code is used to tag the different locations. This code is preceded by a synchronizing chirp waveform that allows noncoherent detection even under strong Doppler frequency shifts. The proposed system is first characterized in terms of robustness against noise, coverage, Doppler tolerance, and intertag interference, making use of a modular simulator. This simulator is based on three basic stages that account for the frequency response of the emitter-receiver pair, the attenuation of acoustic signals in air, and the noncoherent demodulation. This system is then implemented in an Android-based platform and tested in a real scenario. The results of this experimental analysis show good agreement with the previous characterization, and they also confirm the feasibility of the proposed system to develop location-aware applications.

• 出版日期2018-2