NDLI: A VXI-bus frequency-agile digital filter/analyzer

Content Provider	IEEE Xplore Digital Library
Author	Bragg, S.D. Smith, J.G.
Copyright Year	1995
Description	Author affiliation: Frontier Eng., Electron. Syst. Inc., Stillwater, OK, USA (Bragg, S.D.; Smith, J.G.)
Abstract	A significant recent development in ATE design is the virtual instrument. A virtual instrument is usually defined as the use of data acquisition hardware with software executing on a general-purpose computer to emulate such test instruments as oscilloscopes and frequency counters. These instruments are virtual in the sense that software determines their functionality. Applying this idea to filtering, a VXIbus instrument has been developed that provides high-speed, reconfigurable digital filtering. This paper addresses the architecture and applications of this instrument; a frequency-agile Digital Filter/Analyzer (DFA). Combining programmable FIR digital filter processors with a general-purpose DSP, the instrument can act as programmable lowpass, highpass, bandpass, bandstop or variable delay line filters, with cutoff frequencies in the HF region. The instrument's built-in filter design firmware can create Hanning-windowed filter configurations with arbitrary cutoff frequencies. Alternatively, the user can use software on the host computer to compute and upload filter coefficients. Multiple filter configurations from either source can be stored in the instrument's memory and transferred to the digital filter automatically or on command by the DSP and firmware. The instrument's firmware features a filter analysis package. While the filter processors operate in real-time, the DSP performs Fourier analysis on any one of the following: the filter's input spectrum, output spectrum, or its impulse response. This unique feature allows the instrument to analyze its performance.
Starting Page	574
Ending Page	579
File Size	564200
Page Count	6
File Format	PDF
ISBN	0780326210
DOI	10.1109/AUTEST.1995.522727
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-08-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Digital filters Instruments Finite impulse response filter Band pass filters Digital signal processing Microprogramming Filtering Cutoff frequency Performance analysis Data acquisition
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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