Results 221 to 230 of about 94,254 (261)
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Proceedings of the IEEE, 1975
It is shown that the magnitude of the ambiguity function can be easily displayed on a spectrum analyzer. The technique used employs delay lines operating only on the modulation waveform. Examples of measured ambiguity functions are given for FM sine waves. These results are shown to be in agreement with theory.
M.C. Bartlett, L.W. Couch, R.C. Johnson
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It is shown that the magnitude of the ambiguity function can be easily displayed on a spectrum analyzer. The technique used employs delay lines operating only on the modulation waveform. Examples of measured ambiguity functions are given for FM sine waves. These results are shown to be in agreement with theory.
M.C. Bartlett, L.W. Couch, R.C. Johnson
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Frames of cross ambiguity functions
IEEE Signal Processing Letters, 2000Frames of two-dimensional (2-D) signals arising from frames of signals in one dimension are proposed. Such 2-D frames are obtained by computing the cross ambiguity function between frame elements in one dimension and elements of the corresponding reciprocal frame.
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1998
Suppose B is a subgroup of a finite abelian group A, Δ0 is the critical sampling subgroup $${{\Delta }_{0}} = B \times {{B}_{*}},$$ and Δ is a subgroup of A × A*. Unless otherwise specified, F denotes the Zak transform of f over B.
Richard Tolimieri, Myoung An
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Suppose B is a subgroup of a finite abelian group A, Δ0 is the critical sampling subgroup $${{\Delta }_{0}} = B \times {{B}_{*}},$$ and Δ is a subgroup of A × A*. Unless otherwise specified, F denotes the Zak transform of f over B.
Richard Tolimieri, Myoung An
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[1992] Conference Record of the Twenty-Sixth Asilomar Conference on Signals, Systems & Computers, 2003
The authors present a new definition of ambiguity and illustrate its application to the study of passive localization of sources in deep ocean situations. The tool developed allows the study of the impact of all relevant parameters, including those relative to the physical medium as well as those pertinent to the instrumentation and signals involved ...
J.M. Moura, M.J. Rendas
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The authors present a new definition of ambiguity and illustrate its application to the study of passive localization of sources in deep ocean situations. The tool developed allows the study of the impact of all relevant parameters, including those relative to the physical medium as well as those pertinent to the instrumentation and signals involved ...
J.M. Moura, M.J. Rendas
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Radar Ambiguity Functions and Group Theory
SIAM Journal on Mathematical Analysis, 1985If \(f\in L^ 2({\mathbb{R}})\) then, for \((u,v)\in {\mathbb{R}}^ 2,\) \(A(f)(u,v)=\)defines the radar ambiguity function of f, in \(L^ 2({\mathbb{R}}^ 2)\). The paper studies the properties of ambiguity functions. It is shown that the set of all ambiguity functions is closed in \(L^ 2({\mathbb{R}}^ 2)\) and that if f,g\(\in L^ 2({\mathbb{R}})\), then \
Auslander, Louis, Tolimieri, Richard
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A cognitive approach for ambiguity function shaping
2012 IEEE 7th Sensor Array and Multichannel Signal Processing Workshop (SAM), 2012In this paper, we propose a cognitive approach to design phase-only modulated waveforms sharing a desired ambiguity function. We formulate the problem as a quartic order polynomial optimization problem with a constant modulus constraint on each variable. Thus, we devise an optimization procedure based on the Maximum Block Improvement (MBI) approach. At
AUBRY, AUGUSTO +3 more
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2013
The radar ambiguity function is defined as the absolute value of the envelope of the output of a matched filter when the input to the filter is a Doppler-shifted version of the original signal, to which the filter was matched. Ambiguity functions are usually analyzed on a single pulse basis.
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The radar ambiguity function is defined as the absolute value of the envelope of the output of a matched filter when the input to the filter is a Doppler-shifted version of the original signal, to which the filter was matched. Ambiguity functions are usually analyzed on a single pulse basis.
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A Note on the Ambiguity Function
Journal of the Society for Industrial and Applied Mathematics, 1963openaire +1 more source
A search step optimization in an ambiguity function-based GNSS precise positioning
Survey Review, 2022Krzysztof Nowel +2 more
exaly