Browsing by Author "Demidenko SN"

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    A low-cost sensing system for quality monitoring of dairy products
    (IEEE, 2006) Mukhopadhyay SC; Gooneratne CP; Sen Gupta G; Demidenko SN
    The dairy industry is in need of a cost-effective, highly reliable, very accurate, and fast measurement system to monitor the quality of dairy products. This paper describes the design and fabrication works undertaken to develop such a system. The techniques used center around planar electromagnetic sensors operating with radio frequency excitation. Computer-aided computation, being fast, facilitates on-line monitoring of the quality. The sensor technology proposed has the ability to perform volumetric penetrative measurements to measure properties throughout the bulk of the product. © 2006 IEEE.
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    Analysis and application of digital spectral warping in analog and mixed-signal testing
    (Institute of Electrical and Electronics Engineers, 2003) Allen WP; Bailey D; Demidenko SN; Piuri V
    Spectral warping is a digital signal processing transform which shifts the frequencies contained within a signal along the frequency axis. The Fourier transform coefficients of a warped signal correspond to frequency-domain 'samples' of the original signal which are unevenly spaced along the frequency axis. This property allows the technique to be efficiently used for DSP-based analog and mixed-signal testing. The analysis and application of spectral warping for test signal generation, response analysis, filter design, frequency response evaluation, etc. are discussed in this paper along with examples of the software and hardware implementation.