نتایج جستجو برای: radar transmitter

تعداد نتایج: 55304  

2018
Davide Massaro Riccardo Ardoino Marco Grazzini

The importance of high resolution range profiles (HRRPs) for radar applications like tracking or classification is well known. In the scientific literature several approaches have been investigated to obtain HRRPs from wideband radar signals. Recent works show that noise radar waveforms can be exploited in this sense due to their high resolution and low peak to sidelobe ratio (PSLR) properties....

Journal: :IEEE Journal of Selected Topics in Signal Processing 2021

Joint communication and radar sensing (JCR) represents an emerging research field aiming to integrate the above two functionalities into a single system, sharing majority of hardware signal processing modules and, in typical case, transmitted signal. It is recognised as key approach significantly improving spectrum efficiency, reducing device size, cost power consumption, performance thanks pot...

Journal: :IEEE Signal Processing Letters 2022

Intelligent reflecting surface (IRS) is a promising technology being considered for future wireless communications due to its ability control signal propagation. This paper considers the joint active and passive beamforming problem an IRS-assisted radar, where multiple IRSs are employed assist surveillance of targets in cluttered environments. Specifically, we aim maximize minimum target illumi...

Journal: :IEEE Geoscience and Remote Sensing Letters 2022

The tilt phenomenon or skew in bistatic synthetic aperture radar (SAR) images has been known. This can be observed from the SAR image of a point-like scatterer, even with symmetrical aperture. letter explains this and shows that depends on initial last positions transmitter receiver platforms. A formula to calculate angle based general geometry is provided. supports system design quality measur...

Journal: :The Journal of Korean Institute of Electromagnetic Engineering and Science 2022

In this paper, we present a W-band power amplifier using 28-nm CMOS process for radar applications. The designed consists of two-stage driver and last-stage amplifier. uses differential common-source topology, the adopts cascode topology. Both utilize neutralization technique at stage stability sufficient gain. Each interstage used transformer impedance matching. signal applied to first driving...

2007
David D. Wentzloff Anantha P. Chandrakasan Arthur C. Smith

Ultra-wideband radio (UWB) is a rapidly developing wireless technology that promises unprecedented data rates for short-range commercial radios, combined with precise locationing and high energy efficiency. These benefits stem from the use of wide bandwidths and impulse signaling, implying high channel capacity and precise time resolution. UWB has been used for military radar and imaging since ...

2011
David D. Wentzloff Anantha P. Chandrakasan

Ultra-wideband radio (UWB) is a rapidly developing wireless technology that promises unprecedented data rates for short-range commercial radios, combined with precise locationing and high energy efficiency. These benefits stem from the use of wide bandwidths and impulse signaling, implying high channel capacity and precise time resolution. UWB has been used for military radar and imaging since ...

Journal: :IEEE Access 2022

This research studies the effects of three noise jamming techniques on performance a hybrid multistatic radar network in selection different electronic warfare (EW) situations. The metrics investigated are range and velocity estimation errors found using Cramér-Rao lower bounds (CRLBs). simulated is comprised single active transmitter, illuminators opportunity (IO), receiver co-located at trans...

Journal: :Radio Science 2021

Environmental predictions in the marine atmospheric surface layer (MASL) are imperative to optimize X-band radar system performance environments. Evaporation ducts (ED) lead anomalous propagation where characterization of EDs MASL occurs primarily through two methods: in-situ measurements and numerical modeling. This study investigates differences co-located synchronous refractivity estimations...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده فنی و مهندسی 1386

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