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 ?
Matched filters are optimal for detecting a known reference image in additive white Gaussian noise environment.
Extensively revised and updated, coverage includes description of the function of transmitters, antennae, receivers, matched filters, and signal processors.
The received signal is first stripped of its cyclic extension and then passed through a bank of chip matched filters, as shown in Figure 1, where
is the chip matched filter for the pth sub channel, followed by chip rate (1/[T.
3 Optimum Detection, Space-Time Matched Filters, and Beam Forming in Gaussian Noise Fields
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.
A matched filter response is easily calculated following the basis expansion.
m] (n) are the basis coefficients of the locally generated matched filter template.
The matched filter easily generalizes to communications receivers, incorporating channel estimation and equalization.