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Ambiguity of the phase-reconstruction problem
Optics Letters, 1980Is it possible to determine a function with a finite support from the modulus of its Fourier transform? This problem, the so-called phase problem, is studied theoretically and numerically. It is shown theoretically that, at least for a wide class of functions, such determination is not possible.
HUISER, AMJ, VANTOORN, P
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On an ambiguity in the definition of the amplitude and phase of a signal
Signal Processing, 1999zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Leon Cohen +2 more
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Ambiguities on convolutions with applications to phase retrieval
2016 50th Asilomar Conference on Signals, Systems and Computers, 2016In this work we characterize all ambiguities of the convolution on two fixed finite-dimensional complex vector spaces. It will be shown that the convolution ambiguities correspond to factorization ambiguities in the z-domain, which are generated by swapping their zeros.
Walk, Philipp +3 more
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The Detection of Ambiguous Phase in Hard-Limited Signals
IEEE Transactions on Communications, 1980Summary: In LORAN tracking of radiosondes, the ground tracking station must lock on and track a particular carrier zero crossing in each pulse of a LORAN signal which has been received, hard limited, and retransmitted by a radiosonde target. A variety of causes may result in advance or retard slippage by one (or more) carrier cycle(s). Similar problems
R. Malik, P. Dollard
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Phase ambiguity resolution in trellis-coded modulations
IEEE Transactions on Communications, 1990A rotation detection algorithm for solving the phase ambiguity problem in trellis-coded modulations is proposed. This algorithm is simple to implement and may be an efficient alternative to rotationally invariant codes. Its performance has been investigated by simulation and appears promising. >
U. Mengali +2 more
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Phase ambiguity solution with the Pyramid Phasing Sensor
SPIE Proceedings, 2006In the technological development for the ELTs, one of the key activities is the phasing and alignment of the primary mirror segments. To achieve the phasing accuracy of a small fraction of the wavelength, an optical sensor is required. In 2005 has been demonstrated that the Pyramid Wavefront Sensor can be employed in closed loop to correct ...
E. Pinna +7 more
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