6 April 1995 Hardware implementation of multiresolution filtering for broadband instrumentation
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Abstract
The authors have constructed a wavelet processing board that implements a 14-level wavelet transform. The board uses a high-speed analog-to-digital (A/D) converter, a hardware queue, and five fixed-point digital signal processing (DSP) chips in a parallel pipeline architecture. All five processors are independently programmable. The board is designed as a general purpose engine for instrumentation applications requiring near real-time wavelet processing or multiscale filtering. The present application is the processing engine of a magnetic field monitor that covers 305 Hz through 5 MHz. The monitor is used for the detection of peak values of magnetic fields in nuclear power plants. This paper describes the design, development, simulation, and testing of the system. Specific issues include the conditioning of real-world signals for wavelet processing, practical trade-offs between queue length and filter length, selection of filter coefficients, simulation of a 14-octave filter bank, and limitations imposed by a fixed-point processor. Test results from the completed wavelet board are included.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen W. Kercel, William B. Dress, "Hardware implementation of multiresolution filtering for broadband instrumentation", Proc. SPIE 2491, Wavelet Applications II, (6 April 1995); doi: 10.1117/12.205460; https://doi.org/10.1117/12.205460
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KEYWORDS
Digital signal processing

Receivers

Wavelets

Linear filtering

Optical filters

Filtering (signal processing)

Magnetism

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