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Coherent interference excision using higher order spectra
Proceedings of the IEEE Signal Processing Workshop on Higher-Order Statistics, 2002The bispectrum of a direct sequence spread spectrum communication signal contaminated with coupled multitone jamming provides significant information about the jammer frequencies and thus permits its excision using a bank of notch filters. Jammers that can be modeled as an autoregressive process can also be examined in the bispectral domain and ...
I. Jouny, A. Low
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Measuring higher-order interferences with a five-path interferometer
2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC, 2013In this paper results of an improved version of an experiment was presented, which was proposed by Sorkin in 1994, and was experimentally implemented for the first time in 2010, with the goal of putting a bound on the potential magnitude of higher order interference terms.
Thomas Kauten +4 more
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Blind Equalization in the Presence of Co-channel Interference Based on Higher-Order Statistics
Circuits, Systems, and Signal Processing, 2018An improved blind channel equalization method is proposed based on the generalized eigenvector algorithm (GEA) in this paper. This new method can blindly equalize the desired signal in the presence of strong co-channel interference. The basic idea underlying the improved GEA method is that higher-order cumulants can be sensitive to frequency offset. By
Guohua Wang 0002 +4 more
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Adaptive Noise Canceler for Narrowband/Wideband Interferences Using Higher-Order Statistics
IEEE International Conference on Acoustics Speech and Signal Processing, 1993A higher-order statistics-based adaptive interference canceler is introduced to eliminate additive narrowband and wideband interferences in environments where the interference is non-Gaussian and a reference signal, which is highly correlated with the interference, is available.
C L Nikias
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Micro-encoder based on higher-order diffracted light interference
Journal of Micromechanics and Microengineering, 2005A micro-encoder based on higher-order diffracted light interference has been developed for use in high-precision positioning. It uses ±3-order diffracted beams to obtain interference fringes for displacement detection and provides six signal periods for moving the scale grating by one grating period (3.2 µm) without an interpolation electric circuit ...
Eiji Higurashi, Renshi Sawada
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Higher order interference theories
2013In dieser Masterarbeit wurden Theorien untersucht, die neben Interferenz zweiter Ordnung (wie in der Quantenmechanik, wo diese Interferenz durch Einträge einer Dichtematrix aufgefasst werden können) auch Interferenzterme höherer Ordnung erlauben.
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A new higher-order cumulant-based criterion for adaptive interference canceling
IEEE Antennas and Propagation Society International Symposium 1997. Digest, 2002A new higher-order cumulant-based criterion for an adaptive interference canceler is proposed in the cumulant domain. The input signals are first computed to find the self- and joint-cumulants of the higher-order statistics-based adaptive filter. The paper presents a new "criteron of goodness", called fourth-order cumulant-based minimum sum-of-error ...
null Yuan-Hwang Chen, null Jyh-Jeng Lou
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Higher-order interference effects in the reflection of light from random media
Optical Society of America Annual Meeting, 1992We study the intensity angular correlation function of coherent waves, diffusely reflected from random media in the case in which the speckle pattern does not follow the jointly Gaussian statistics and thus the factorization approximation does not hold.
M. Nieto-Vesperinas, J. A. Sanchez-Gil
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Interference of the eleventh- and higher-order rainbows formed by a pendant water drop
Journal of the Optical Society of America B, 2003Interference of the 11th- and higher-order rainbows formed by a pendant water drop was studied by use of laser beams of wavelengths 632.8 and 532 nm. Time variations of the corresponding glare-point intensity, due to vibration of the droplet, are in agreement with results of a simple model calculation.
Pak-hong Ng +3 more
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Higher-order analysis of the interference patterns in cross-grating interferometers
Annual Meeting Optical Society of America, 1989Both the on-axis and off-axis four-beam, interference patterns are analyzed using ray tracing. The cross-gratinglike interference pattern is accompanied by an extra term which consists of two orthogonal two-beam interference patterns. When partially coherent light is used, the extra term generally degrades the contrast of the cross-gratinglike pattern ...
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