Results 31 to 40 of about 5,161 (241)
Optimal chirp waveforms for long/medium range surveillance radar [PDF]
, 2015 The optimal design of chirp radar waveforms has to satisfy conflicting requirements in terms of PSLR, compressed pulse width and band occupancy. Optimal solutions for different values of the compression ratio (i.e.
Gabriele Pavan +5 more
core +1 more source
IEEE Photonics Journal, 2021 We propose a photonic method to generate and transmit dual-band dual-chirp microwave waveforms based on a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM).
Lu Wang +6 more
doaj +1 more source
Photonic generation of Barker encoded dual-nonlinear frequency modulated RADAR waveforms
Results in Optics, 2023 Photonics enables the development of versatile waveform generators with carrier frequency tunability and broad bandwidths, allowing for high-range resolution for modern radar systems.
Rajveer Dhawan, Amol Choudhary
doaj +1 more source
Optimizing ?0 information from the Jason-2 altimeter [PDF]
, 2009 A radar altimeter's normalized backscatter, ?0, is used in many oceanographic applications, to infer values of wind speed, wind stress, rain rate and the presence of biogenic slicks.
Quartly, Graham D.
core +1 more source
Chirp Signals and Noisy Waveforms for Solid-State Surveillance Radars
Aerospace, 2017 Since the advent of “pulse compression” radar, the “chirp” signal (Linear Frequency Modulation, LFM) has been one of the most widely used radar waveforms.
Gaspare Galati +2 more
doaj +1 more source
IET Radar, Sonar & Navigation, 2021 A signal embedding scheme into the emission of multiple‐input multiple‐output (MIMO) frequency hopping (FH) radar is analysed. In this scheme, the phase shift keying (PSK) communication symbols are multiplied with the frequency hops in fast‐time ...
Indu Priya Eedara +2 more
doaj +1 more source
Information theory and radar waveform design [PDF]
IEEE 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
Neural Networks & Machine Learning in Cognitive Radar [PDF]
, 2022 S.2074-2079This paper reports on how neural networks and machine learning can support the development of cognitive radar systems. We discuss the aspects of cognition that can be supported by neural networks, review the recent literature on the use of ...
Smith, Graeme E. +3 more
core +1 more source
A Novel Joint Radar-communication Waveform Design Method Based on Distributed Aperture
Leida xuebao, 2023 Joint radar-communication waveform design has been the focus of intensive research in recent years. The integrated waveform based on a collocated antenna can simultaneously detect targets and communicate with multiple users in different directions ...
Liu LIU +4 more
doaj +1 more source
Space‐Time Coding Conformal Metasurfaces for Multifrequency Beam Steering and Shaping
Advanced Materials, EarlyView.Space‐time coding conformal metasurfaces enable dynamic wave control on curved surfaces by combining programmable spatial patterns with temporal modulation. This study shows that a single conformal aperture can independently manipulate multiple frequency components, achieving multifunctional beam shaping and steering, with implications for ...
Filippo Pepe +8 more
wiley +1 more source