نتایج جستجو برای: radar receiver

تعداد نتایج: 90028  

Journal: :Atmosphere 2022

With the development of wireless communication technology, electromagnetic interference (EMI) artificial radio to weather radar increases significantly, which has a serious impact on quality data. Most research detecting and suppressing was based primary product radar. This paper researches effectiveness deep convolutional neural networks (DCNN) identify suppress I/Q data output from front end ...

2010
C. Z. van de Beek H. Leijnse J. N. M. Stricker R. Uijlenhoet H. W. J. Russchenberg

This study presents an analysis of 195 rainfall events gathered with the X-band weather radar SOLIDAR and a tipping bucket rain gauge network near Delft, The Netherlands, between May 1993 and April 1994. The aim of this paper is to present a thorough analysis of a climatological dataset using a high spatial (120 m) and temporal (16 s) resolution X-band radar. This makes it a study of the potent...

2016
Yanpeng Li Xiang Li Hongqiang Wang Bin Deng Yuliang Qin

Radar is a very important sensor in surveillance applications. Near-space vehicle-borne radar (NSVBR) is a novel installation of a radar system, which offers many benefits, like being highly suited to the remote sensing of extremely large areas, having a rapidly deployable capability and having low vulnerability to electronic countermeasures. Unfortunately, a target detection challenge arises b...

2006
R ROUVEURE P FAURE MO MONOD

_2IK0Z5R10 In this paper we present a new sensor for mobile robot dedicated to obstacle detection, localization and mapping in extensive outdoor environments. Radar scanner principle. The sensor is b ased on microwave radar technology. Laser and video based sensors are common visually based sensors, particularly well adapted in indoor environments. But these systems are affected by visibility c...

2017
John H. Bradford Joshua Nichols T. Dylan Mikesell Joel T. Harper John H. BRADFORD Joshua NICHOLS T. Dylan MIKESELL Joel T. HARPER

We conducted two-dimensional continuous multi-offset georadar surveys on Bench Glacier, south-central Alaska, USA, to measure the distribution of englacial water. We acquired data with a multichannel 25MHz radar system using transmitter–receiver offsets ranging from 5 to 150m. We towed the radar system at 5–10 kmh with a snow machine with transmitter/receiver positions established by geodetic-g...

2002

The most unique characteristic of the matched filter is that it produces the maximum achievable instantaneous SNR at its output when a signal plus additive white noise are present at the input. The noise does not need to be Gaussian. The peak instantaneous SNR at the receiver output can be achieved by matching the radar receiver transfer function to the received signal. We will show that the pe...

2003
Sutanay Choudhury

In conventional radar systems the receiver bandwidth is designed to be similar to be bandwidth of the transmit pulse. For a given range sample estimates are averaged over time to improve the estimation accuracy. A number of methods have been proposed in the past for improving the quality of estimates without sacrificing range resolution (Mudukutore et al, 1998). Schemes using shorter pulsewidth...

Journal: :EURASIP J. Adv. Sig. Proc. 2008
Enrico Paolini Andrea Giorgetti Marco Chiani Riccardo Minutolo Mauro Montanari

System aspects of an anti-intruder multistatic radar based on impulse radio ultrawideband (UWB) technology are addressed. The investigated system is composed of one transmitting node and at least three receiving nodes, positioned in the surveillance area with the aim of detecting and locating a human intruder (target) that moves inside the area. Such systems, referred to also as UWB radar senso...

Journal: :Applied optics 1991
R G Frehlich M J Kavaya

The signal-to-noise ratio (SNR) and heterodyne efficiency are investigated for coherent (heterodyne detection) laser radar under the Fresnel approximation and general conditions. This generality includes spatially random fields, refractive turbulence, monostatic and bistatic configurations, detector geometry, and targets. For the first time to our knowledge, the effects of atmospheric refractiv...

Journal: :Wireless Sensor Network 2011
Oscar Filio-Rodriguez Valeri Kontorovich Serguei Primak Fernando Ramos-Alarcón

In this paper it is shown that cyclostationary spectrum sensing for Cognitive Radio networks, applying multiple cyclic frequencies for single user detection can be interpreted (with some assumptions) in terms of optimal incoherent diversity addition for “virtual diversity branches” or SIMO radar. This approach allows proposing, by analogy to diversity combining, suboptimal algorithms which can ...

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