Results 21 to 30 of about 5,401,792 (304)

The communicative function of ambiguity in language [PDF]

Cognition, 2012
We present a general information-theoretic argument that all efficient communication systems will be ambiguous, assuming that context is informative about meaning. We also argue that ambiguity allows for greater ease of processing by permitting efficient linguistic units to be re-used.
Piantadosi, Steven T., Tily, Harry, Gibson, Edward A.   +2 more
openaire   +4 more sources

Enhanced Micro-Doppler Feature Extraction Using Adaptive Short-Time Kernel-Based Sparse Time-Frequency Distribution

Remote Sensing, 2023
The extraction of the micro-Doppler (m-D) feature based on time-frequency distribution (TFD) is of great significance for target detection and identification.
Yang Yang, Yongqiang Cheng, Hao Wu, Zheng Yang, Hongqiang Wang   +4 more
doaj   +1 more source

Space-variant ambiguity function processor [PDF]

Applied Optics, 1979
The ambiguity function that results from the space-variant optical processing of nonlinear coded waveforms is analyzed. The space-variant signal processor considered is realized by coordinate transformations. Specifically we consider x = lnt, which results in a Mellin transform-based Doppler-invariant signal processor.
CASASENT, D., PSALTIS, D.
openaire   +2 more sources

Investment under ambiguity with the best and worst in mind [PDF]

, 2011
Recent literature on optimal investment has stressed the difference between the impact of risk and the impact of ambiguity - also called Knightian uncertainty - on investors' decisions.
David Schröder, Schröder, David
core   +1 more source

On the ambiguity function for accelerating target in FMCW radar

Journal of Telecommunications and Information Technology, 2023
In the paper, we are concerned with FMCWradar detection of an accelerating target, echo of which is buried in an additive white Gaussian noise. We derive and analyze three-dimensional generalized ambiguity function for target range, velocity and ...
Rafał Rytel-Andrianik
doaj   +1 more source

Construction of Waveform Library in Cognitive Radar

Polish Maritime Research, 2017
Based on the thoughts of cognitive radar, Fractional Fourier Transform (FrFT) is used to generate a rotatable waveform libraries of Frank coded/Barker coded waveform in this paper.
Yongqiang Guo, Yumin Wu, Hui Liu
doaj   +1 more source

Constrained Transmit Beampattern Design Using a Correlated LFM-PC Waveform Set in MIMO Radar

Sensors, 2020
This paper considers the design of a desired transmit beampattern under the good ambiguity function constraint using a correlated linear frequency modulation-phase coded (LFM-PC) waveform set in multiple-input-multiple-output (MIMO) radar. Different from
Sheng Hong, Yantao Dong, Rui Xie, Yu Ai, Yuhao Wang   +4 more
doaj   +1 more source

Neural activity associated with the passive prediction of ambiguity and risk for aversive events [PDF]

, 2009
In economic decision making, outcomes are described in terms of risk (uncertain outcomes with certain probabilities) and ambiguity (uncertain outcomes with uncertain probabilities).
Dolan, R.J., R. J. Dolan, Bach, D., B. Seymour, D. R. Bach, Dolan, R. ; https://orcid.org/, Seymour, B., Bach, D.R.   +7 more
core   +1 more source

Coarse-to-Fine Localization of Underwater Acoustic Communication Receivers

Sensors, 2022
For underwater acoustic (UWA) communication in sensor networks, the sensing information can only be interpreted meaningfully when the location of the sensor node is known. However, node localization is a challenging problem.
Pan He, Lu Shen, Benjamin Henson, Yuriy V. Zakharov   +3 more
doaj   +1 more source

Fractional ambiguity function: Properties and uncertainty inequalities in signal processing

Franklin Open
This article presents the construction of the fractional ambiguity function by combining the definition of the ambiguity function and the kernel of the fractional Fourier transform.
Mawardi Bahri, Islah Audziah P.B., Hatem Mejjaoli, Amran Rahim   +3 more
doaj   +1 more source