Related Experiment Video
Updated: Jul 7, 2026

A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats
Published on: November 7, 2017
A low-cost high-definition wireless sensor system utilizing intersymbol interference
1Applied Electronics Laboratory, University of Technology Vienna, Vienna, A-1040, Austria. pohl@ps.1.iace.tuwien.ac.at
Abstract:
A new method for wireless interrogation of a passive SAW sensor with multiple reflectors, utilizing the signal interference during overlap of the sensor's response bursts, is introduced. Within this time interval, the amplitude or the phase, respectively, is measured. By varying the frequency of the relatively long interrogation bursts, the amount of interference and destructive interferences (notches) are searched, respectively. So the measurand influencing the sensor or its identification information can be gained. The principle yields high resolution with a low cost interrogating system. The basic principle, calculations of sensitivity, and experimental results for temperature measurements are presented. The hardware effort and the performance of the system are discussed.
Related Concept Videos
Electronic Distance Measuring Instruments
Reconstruction of Signal using Interpolation
Signal and System
