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Showing 1 to 20 of 87 for “"matched-filter"”.
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SPREAD SPECTRUM SYNCHRONIZATION USING MATCHED FILTER AND CYCLIC ACCUMULATION
… a transition based estimate. Both schemes use a matched filter and cyclic accumulation to provide noise averaging. The direct estimate scheme can operate at a very low SNR while the transition based scheme is more noise sensitive. The transition based sequence estimate scheme makes the …
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The effects of spectral estimation on matched filter design
Moving-average matched filters (MAMF's) are a class of digital filters used to detect the presence of a known signal in noise. Designing matched filters requires knowledge of the structure of the signal and the noise. If the spectral density of the noise is not known or is changing with time its …
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Integrated optical grating-based matched filter for fiber-optic communications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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A recursive matched-filter to systematically explore a volcanic long-period earthquake swarm
The matched-filter technique is an effective way to detect repeats, or near-repeats, of a seismic source, but prior identification of an event from that source to use as a template is required. We propose a recursive matched-filter approach to systematically explore earthquake swarms, here applied …
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Gravitational radiation detectability of supernova 1987A's remnant fully matched filter for double resonant gravitational detector
… signals, the ALLEGRO Gravitational Group used a matched filter constructed in the time domain, and with the particular characteristic of separating the information from the two resonant modes of the bar. The information from the two resonant modes is treated separately until the end when the …
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Measurement of the conjugate propagation of VLF waves by matched filter and application to ionospheric diagnosis
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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A matched filter technique for slow radio transient detection and first demonstration with the Murchison Widefield Array
… radio transients that is based on temporal matched filters applied directly to time series of images. This technique has well-defined statistical properties and is applicable to variable and transient searches for any instrument. Using the Murchison Widefield Array as an example, we …
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Pulse compression applied to the detection of F.S.K. and P.S.K. signals
The matched filter detector is well known as the optimum detector for use in communication, as well as in radar systems for signals corrupted by Additive White Gaussian Noise (A.W.G.N.). Non-coherent F.S.K. and differentially coherent P.S.K. (D.P.S.K.) detection schemes, which employ a new approach …
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A clutter power computation procedure for airborne Doppler radar
… the received power waveform at the output of a matched filter for use in the development of clutter maps related to Doppler signal processing. In developing the algorithm, several of its features are given close examination; this includes a numerical and analytical justification for the azimuth …
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Enhanced Weak Signal Detection Using SVM Based Correlation Algorithm
… for signals past the limits of those of the matched filter and the cross-correlation in the presence of white and colored noise. To evaluate the effectiveness of the correlation algorithm, Monte Carlo simulations are performed to determine the performance in the context of different types of …
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Ultra-Wideband Channel Modeling using Singularity Expansion Method
… ratio (SNR) of a correlation based matched-filter receiver, limiting the achievable data-rate and user capacity. Most wideband channel models do not account for all the identified dispersion mechanisms namely the frequency dispersion, the resonant dispersion and the multipath …
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Adaptive Radar with Application to Joint Communication and Synthetic Aperture Radar (CoSAR)
… is known to be a thresholding of the output of a matched filter. Radar systems, however, often operate in multi-target environments; notably air-to-ground synthetic aperture radars. For such applications, the hypothesis test which shows matched-filter/thresholding to be optimal does not well …
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Spectral discrimination of fish shoals from seafloor in the Gulf of Maine during the ocean acoustic waveguide remote sensing (OAWRS) 2006 experiment
… Hypothesis Testing, Kullback-Leibler divergence, Matched Filter and discriminating based on the shape of the spectral dependence, methods originated from Detection theory, are applied in well documented cases from Gulf of Maine during spawning season to distinguish seafloor returns from fish …
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Blind multidimensional matched filtering for wireless channelswith multiple antennas
… statistics of the received signal. The Blind Matched Filter (BMF) receiver on the other hand makes use of an adaptive algorithm, i.e. the Constant Modulus Algorithm (CMA), to estimate the channel without the need for an implementation inefficient approach as stated above. The BMF method …
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Characterization of Enhanced Interferometric Gravitational Wave Detectors and Studies of Numeric Simulations for Compact-Binary Coalescences
… in the LIGO data. Currently this is done using matched-filter techniques, which correlate the detector data against analytic models of the emitted gravitational waves. Several choices must be made in constructing a search for signals from such binary coalescences.</p> <p>Any discrepancy between …
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