Results 61 to 70 of about 2,547 (185)

Single Carrier-Frequency Division Multiple Access Radar: Waveform Design and Analysis

open access: yesIEEE Access, 2020
This paper proposes Single Carrier-FDMA radar, which is not only a solution to the shortcomings of OFDM radars but also offers improved Ambiguity Function and autocorrelation properties.
Rahat Saadia, Noor M. Khan
doaj   +1 more source

Monitoring Groundwater Pumping Using Time‐Lapse Tomography From Ambient Seismic Noise

open access: yesWater Resources Research, Volume 62, Issue 4, April 2026.
Abstract Management of water resources will be of critical importance as the effects of climate change accelerate. This implies the need to monitor water resources with high spatial and temporal resolution. One way to meet this need could be passive seismic methods using ambient seismic noise. In this study, we present a novel approach using time‐lapse
Richard Kramer   +5 more
wiley   +1 more source

Exceptionally Elongated Strike‐Slip Rupture Caused by the 2025 MW 7.8 Myanmar Earthquake

open access: yesGeophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract The interplay between fault geometry and rupture behavior remains poorly understood. The 2025 Myanmar earthquake ruptured the Sagaing fault, a major continental strike‐slip fault with simple geometry. We integrated geodetic and teleseismic observations to investigate its rupture process through finite‐fault kinematic inversions and back ...
Quanshu Zhao   +7 more
wiley   +1 more source

Phase coded waveforms for integrated sensing and communication systems

open access: yesIET Radar, Sonar & Navigation
Nowadays, especially with the developments in the automotive industry, it has become a highly popular topic for radar and communication systems to operate on the same platform and perform joint tasks to increase situational awareness.
Sevda Şahin, Tolga Girici
doaj   +1 more source

Characterization and Localization of Chemical Explosions and Lightning Flashes by a Flotilla of Stratospheric Balloons

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 5, 16 March 2026.
Abstract On 3 August 2021, a flotilla of four Heliotrope solar hot air balloons was launched from central New Mexico (USA). The balloons, equipped with microbarometers, flew from sunrise to sunset at altitudes between 17 and 22 km. During the flight, eight chemical explosions ranging from 45 to 136 kg TNT equivalent and a thunderstorm occurred in the ...
T. Farges   +5 more
wiley   +1 more source

Jammer-Nulling Transmit-Adaptive Radar Against Knowledge-Based Jammers in Electronic Warfare

open access: yesIEEE Access, 2019
The authors present transmit-adaptive jammer nulling waveforms in cognitive radar (CRr) for aircraft response recognition as a form of electronic support in the electronic warfare domain. New forms of knowledge-based noise jammers that function as a form
Q. Jeanette O. Tan, Ric A. Romero
doaj   +1 more source

The Finite Heisenberg-Weyl Groups in Radar and Communications

open access: yesEURASIP Journal on Advances in Signal Processing, 2006
We investigate the theory of the finite Heisenberg-Weyl group in relation to the development of adaptive radar and to the construction of spreading sequences and error-correcting codes in communications. We contend that this group can form the basis for
Calderbank AR, Moran W, Howard SD
doaj   +1 more source

Statistical Angular Resolution Limit for Ultrawideband MIMO Noise Radar

open access: yesInternational Journal of Antennas and Propagation, 2015
The two-dimensional angular resolution limit (ARL) of elevation and azimuth for MIMO radar with ultrawideband (UWB) noise waveforms is investigated using statistical resolution theory.
Xiaoli Zhou   +4 more
doaj   +1 more source

Information theory and radar waveform design [PDF]

open access: yesIEEE Transactions on Information Theory, 1993
Summary: The use of information theory to design waveforms for the measurement of extended radar targets exhibiting resonance phenomena is investigated. The target impulse response is introduced to model target scattering behavior. Two radar waveform design problems with constraints on waveform energy and duration are then solved.
openaire   +1 more source

Joint Design of Autocorrelation and Spectral Characteristics of Radar Waveforms

open access: yesIEEE Access
One important aspect of radar systems is the transmit waveform, which plays a key role in defining system’s detection capability and target resolution.
Omar Aldayel   +4 more
doaj   +1 more source

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