matched filter


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matched filter

[′macht ′fil·tər]
(computer science)
In character recognition, a method employed in character property detection in which a vertical projection of the input character produces an analog waveform which is then compared to a set of stored waveforms for the purpose of determining the character's identity.
(electronics)
A filter with the property that, when the input consists of noise in addition to a specified desired signal, the signal-to-noise ratio is the maximum which can be obtained in any linear filter.
References in periodicals archive ?
The matched filter easily generalizes to communications receivers, incorporating channel estimation and equalization.
The team chose the 2004 Parkfield quake to test the matched filter technique because the quake is on the San Andreas fault.
The chip also includes an A/D converter, demodulator, matched filter, adaptive equalizer, FEC, NCO, phase locked loop and RAM microcode memory.
The combination of energy sampling and matched filter theory applied to an RF carrier creates the foundation for the implementation of our direct conversion technology.
Our on chip matched filter technology is a revolutionary radio platform which not only provides cost and performance benefits to existing RF products, but will enable the development of next generation multi-band, multi-mode radio products that marketers have been dreaming about but haven't yet found a practical solution for," he said.
Matched filter sets are sold under one part number, providing simplified stocking while providing improved availability so that a complete set of filters is on hand at time of filter change.
Matched filters are optimal for detecting a known reference image in additive white Gaussian noise environment.
3 Optimum Detection, Space-Time Matched Filters, and Beam Forming in Gaussian Noise Fields
Extensively revised and updated, coverage includes description of the function of transmitters, antennae, receivers, matched filters, and signal processors.
Through that program, we recently developed a unique Fiber Bragg Grating-Artificial Reference Cell (FBG-ARC) technology for remote gas sensing based on novel modulated, tailored matched filters and correlation spectroscopy for the NSF.
Patent #6,111,671 on August 29, 2000, for Matched Filters for a Real Time Fingerprint Sensor and Verification System, filed November 18, 1999, as a divisional patent application of U.
It incorporates a 2-90 Mbps variable BPSK/QPSK/OQPSK receiver, dual 8-bit A/D converters, a phase/frequency recovery block, variable rate digital filters, square root Nyquist matched filters, acquisition and tracking loops, and a DVB/DSS/Primestar compliant FEC decoder onto a single chip.