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RESEARCH PRODUCT
On the Design of Probe Signals in Wireless Acoustic Sensor Networks Self-Positioning Algorithms
Maximo CobosJaume SeguraSantiago Felici-castellJuan J. Pérez-solanosubject
Audio signalComputer sciencebusiness.industryApplied Mathematics020208 electrical & electronic engineeringReal-time computingBandwidth (signal processing)020206 networking & telecommunicationsRanging02 engineering and technologycomputer.software_genreTransducerSignal Processing0202 electrical engineering electronic engineering information engineeringChirpWirelessElectrical and Electronic EngineeringAudio signal processingbusinessFrequency modulationcomputerdescription
A wireless acoustic sensor network comprises a distributed group of devices equipped with audio transducers. Typically, these devices can interoperate with each other using wireless links and perform collaborative audio signal processing. Ranging and self-positioning of the network nodes are examples of tasks that can be carried out collaboratively using acoustic signals. However, the environmental conditions can distort the emitted signals and complicate the ranging process. In this context, the selection of proper acoustic signals can facilitate the attainment of this goal and improve the localization accuracy. This letter deals with the design and evaluation of acoustic probe signals allowing the implementation of ranging applications using unsynchronized audio signals acquired by different network nodes. The proposed signals have been evaluated in diverse simulated environments and implemented in a real deployment. The results confirm the suitability of these signals for implementing localization applications with an accuracy that is in the order of 1 cm.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-04-01 | IEEE Signal Processing Letters |