A non-planar attenuating waves account of a modified radar rangefinding method for cardiac applications

• Main Author: Jadie, Alfonso Vicente Lim
• Format: text
• Language: English
• Published: Animo Repository 2024
• Subjects: Heart—Monitoring; Signal processing; Remote sensing; Physics
• Online Access: https://animorepository.dlsu.edu.ph/etdm_physics/17; https://animorepository.dlsu.edu.ph/context/etdm_physics/article/1012/viewcontent/2024_Jadie_A_non_planar_attenuating_waves_account_of_a_modified_radar_Full_text.pdf
• Institution: De La Salle University

A set of modified radar equations for use in step-frequency radar in heart monitoring applications was formulated accounting for both signal attenuation and three-dimensional wavefront spreading from a point source. The effects of these modifications on rangefinding performance were tested using simulation data collected from a virtual model of a radar heart monitor and its operating environment, wherein the signal data was derived from the resulting electric field distribution within the simulation model as approximated via finite-element method. It was found that the modifications to account for spherical wavefronts acted to reduce the relative amplitude of radar signatures at close-range while increasing that of radar signatures at longer-range. Meanwhile, the modifications made to account for signal attenuation were found to overcompensate for the attenuation effects, due to the limited accuracy of the inverse Fourier transform operation utilized in depicting exponential decay. Keywords: heart monitoring, step-frequency radar, finite-element-method modeling