Simultaneous amplitude measurement of multiple Chirp Spread Spectrum signals

Moschitta, Antonio; Comuniello, Antonella; Santoni, Francesco; Angelis, Alessio De; Carbone, Paolo; Fravolini, Mario Luca

doi:10.1109/i2mtc43012.2020.9129567

Cited by 4 publications

(2 citation statements)

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“…Signal separation and identification are obtained by modulating the coils with on-off-keying using orthogonal code sequences, an approach called Code Division Multiple Access (CDMA). A CDMA technique using Chirp Spread Spectrum signals has been recently investigated for an MPS with twenty magnetic transmitters [21]. In a different approach [22], each magnetic node transmits using a different frequency and signals are separated by Fourier analysis.…”

Section: Introductionmentioning

confidence: 99%

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A Multi-Node Magnetic Positioning System with a Distributed Data Acquisition Architecture

Santoni

Angelis

Moschitta

et al. 2020

Sensors

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We present a short-range magnetic positioning system that can track in real-time both the position and attitude (i.e., the orientation of the principal axes of an object in space) of up to six moving nodes. Moving nodes are small solenoids coupled with a capacitor (resonant circuit) and supplied with an oscillating voltage. Active moving nodes are detected by measuring the voltage that they induce on a three-dimensional matrix of passive coils. Data on each receiving coil are acquired simultaneously by a distributed data-acquisition architecture. Then, they are sent to a computer that calculates the position and attitude of each moving node. The entire process is run in real-time: the system can perform 62 position and attitude measurements per second when tracking six nodes simultaneously and up to 124 measurements per second when tracking one node only. Different active nodes are identified using a frequency-division multiple access technique. The position and angular resolution of the system have been experimentally estimated by tracking active nodes along a reference trajectory traced by a robotic arm. The factors limiting the viability of upscaling the system with more than six active nodes are discussed.

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Section: Introductionmentioning

confidence: 99%

“…Instead of using Hall sensors, in many MPSs, a time-varying magnetic field is measured by probing the voltage induced on passive coils, in accordance with Faraday's induction law [11,12,14,[21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%