Results 21 to 30 of about 1,799 (215)

Coherent global motion in the absence of coherent velocity signals [PDF]

open access: yesCurrent Biology, 2000
It is widely believed that form and motion are analysed separately in mammalian visual systems. Form is confined within a stream that projects ventrally from V1 to the inferotemporal cortex, and motion within a stream that projects more dorsally, to the posterior parietal cortex [1] [2] [3] [4] [5] [6] [7].
Ross, John   +2 more
openaire   +2 more sources

RST Signalling Corpus: a corpus of signals of coherence relations [PDF]

open access: yesLanguage Resources and Evaluation, 2017
We present the RST Signalling Corpus (Das et al. in RST signalling corpus, LDC2015T10. https://catalog.ldc.upenn.edu/LDC2015T10 , 2015), a corpus annotated for signals of coherence relations. The corpus is developed over the RST Discourse Treebank (Carlson et al. in RST Discourse Treebank, LDC2002T07.
Debopam Das, Maite Taboada
openaire   +2 more sources

Frame coherence and sparse signal processing [PDF]

open access: yes2011 IEEE International Symposium on Information Theory Proceedings, 2011
The sparse signal processing literature often uses random sensing matrices to obtain performance guarantees. Unfortunately, in the real world, sensing matrices do not always come from random processes. It is therefore desirable to evaluate whether an arbitrary matrix, or frame, is suitable for sensing sparse signals.
Dustin G. Mixon   +2 more
openaire   +2 more sources

Spatiotemporal coherent summation of Ultra-Wideband chaotic radio pulses. Experiment [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика
The purpose of this work is to experimentally prove the physical feasibility of coherent addition of chaotic signals (ultra-wideband chaotic radio pulses) in space and time.
Kuzmin, Lev Viktorovich   +3 more
doaj   +1 more source

Coherent Integration Algorithm for a Maneuvering Target Based on Frequency Spectrum Segment Processing

open access: yesIEEE Access, 2020
This paper considers the coherent integration problem for a low-observable maneuvering target, where the velocity and acceleration result in range migration (RM) and Doppler frequency migration (DFM) within the coherent pulse interval.
Jinzhi Xiang, Wei Cui, Jing Tian
doaj   +1 more source

DOA Estimation of Coherent Signals Based on EPUMA Method With Frequency Beam Scanning Leaky-Wave Antennas

open access: yesIEEE Access, 2023
A technique to estimate the DOAs of coherent sources using a passive frequency beam scanning leaky-wave antenna (FBS-LWA) with a subspace based method is presented.
Diyuan Xu   +4 more
doaj   +1 more source

Quaternion-Based Two-Dimensional DOA Estimation for Coherent Underwater Sources Without Eigendecomposition

open access: yesIEEE Access, 2021
For scenarios of coherent underwater sources at low signal-to-noise ratio (SNR), a novel quaternion-based DOA algorithm without eigendecomposition is proposed using a linear vector-hydrophone array.
Yi Lou   +3 more
doaj   +1 more source

Sparsity-Inducing DOA Estimation of Coherent Signals Under the Coexistence of Mutual Coupling and Nonuniform Noise

open access: yesIEEE Access, 2019
The sparse reconstruction techniques can improve the accuracy and resolution of the direction of arrival (DOA) estimation using sensor arrays. However, due to reflective objects and nonidealities of the antennas and circuitry, the received signals may be
Yuexian Wang   +4 more
doaj   +1 more source

Coherence of early motion signals

open access: yesVision Research, 2001
Oscillation thresholds were evaluated for detecting motion and discriminating relative motion. Three horizontally aligned Gaussian blobs oscillated horizontally, with the center in-phase or out-of-phase with the two flankers. Motion thresholds were well below those for static bisection, and involved small contrast changes (
Lappin, Joseph S   +2 more
openaire   +2 more sources

2-D Unitary ESPRIT-Like Direction-of-Arrival (DOA) Estimation for Coherent Signals with a Uniform Rectangular Array

open access: yesSensors, 2013
A unitary transformation-based algorithm is proposed for two-dimensional (2-D) direction-of-arrival (DOA) estimation of coherent signals. The problem is solved by reorganizing the covariance matrix into a block Hankel one for decorrelation first and then
Chengpeng Hao   +3 more
doaj   +1 more source

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