نتایج جستجو برای: ambiguity function af

تعداد نتایج: 1248448  

Journal: :SIAM J. Imaging Sciences 2011
Margaret Cheney Brett Borden

We develop a theory for waveform-diverse moving-target synthetic-aperture radar in the case in which a single moving antenna is used both on transmission and on reception. We assume that the targets (scattering objects) are moving linearly, but we allow an arbitrary, known flight path for the antenna and allow it to transmit a sequence of arbitrary, known waveforms. A formula for phasespace (po...

2014
Matthew Ryan Rhema Vaithianathan Luca Rigotti

An “investment bubble” is a period of “excessive, and predictably unprofitable, investment”(DeMarzo, Kaniel and Kremer, 2007, p.737). Such bubbles most often accompany the arrival of some new technology, such as the tech stock boom and bust of the late 1990’s and early 2000’s. We provide a rational explanation for investment bubbles based on the dynamics of learning in highly uncertain environm...

2011
Christian Kellner Gerhard Riener

We test the implications of ambiguity aversion in a principal-agent problem with multiple agents. When output distributions are uncertain, models of ambiguity aversion suggest that tournaments may become more attractive than independent wage contracts, in contrast to the case where output distributions are known. We do so by presenting agents with a choice between tournaments and independent co...

2006
PHILIPPE JAMING

In this article, we give an estimate of the zero-free region around the origin of the ambiguity function of a signal u in terms of the moments of u. This is done by proving an uncertainty relation between the first zero of the Fourier transform of a non-negative function and the moments of the function. As a corollary, we also give an estimate of how much a function needs to be translated to ob...

Journal: :Signal Processing 2016
Mohammad Mahdi Chitgarha Mojtaba Radmard Mohammad Nazari Majd Seyyed Mohammad Karbasi Mohammad Mahdi Nayebi

One of the important obstacles in MIMO (Multiple Input Multiple Output) radars is the issue of designing proper transmit signals. Indeed, the capability of signal design is a significant advantage in MIMO radars, through which, the system can achieve much better performance. Many different aspects of this performance improvement have been considered yet, and the transmit signals have been desig...

2017
Igor Kopylov Joshua Miller

We run several experiments where people bet on propositions (facts) that they cannot recall with certainty. Forgetting is induced via interference tasks and time delays (up to one year). We use betting preferences to define subjects’ revealed beliefs and their confidence in these beliefs. Forgetting makes revealed beliefs less accurate and reduces the subjective confidence metric as well. Moreo...

2016
Anna Dzvonkovskaya Hermann Rohling Changhe Li Nadav Levanon Eli Mozeson Simon Haykin Brian Currie Thia Kirubarajan

The aim of this paper is to explore the binary sequences with high discrimination using Particle Swarm Optimization with Cauchy Mutation (PSOCM) technique. The cross-ambiguity function method is used to detect the stationary and moving targets in various target detection scenarios. The contour plots of the cross-ambiguity function are computed as a function of

Journal: :Signal Processing 2009
Maria Greco Fulvio Gini Alfonso Farina Muralidhar Rangaswamy

Multistatic radars utilize multiple transmitter and receiver sites to provide several different monostatic and bistatic channels of observation. Multistatic passive and active radar systems can offer many advantages in terms of coverage and accuracy in the estimation of target signal parameters. Unfortunately, their performances are heavily sensitive to the position of receivers and transmitter...

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