Nonlinear radar. Nonlinear radar exploits the difference in frequency between radar w...

S. N. Razin'kov's 13 research works with 14 citatio

Intermodulation Radar for RF Receiver Detections. Abstract: Nonlinear radars are often used to detect the presence of RF electronics. In the state-of-art most of …Nonlinear radars can be utilized to detect electronic devices, which are difficult to detect with conventional radars due to their small radar cross sections (RCS). Since the receiver in a nonlinear radar is designed to only receive harmonic or intermodulated echoes from electronic devices, it is able to separate electronic devices from non-electronic scatters (clutter) by rejecting their ...Mar 8, 2021 · We propose nonlinear beamforming for phased array weather radars (PAWRs). Conventional beamforming is linear in the sense that a backscattered signal arriving from each elevation is reconstructed by a weighted sum of received signals, which can be seen as a linear transform for the received signals. For distributed targets such as raindrops, however, the number of scatterers is significantly ... A bumblebee with a transponder acting as a non-linear junction for tracking the animal by way of harmonic radar. The non-linear junction detector, or an NLJD, is a device that illuminates a small region of space with high- frequency RF energy. Any "non linear junction" in the vicinity—for example, and particularly, the p–n junction —will ... Non-linear Synthetic Aperture Radar. Conventional Synthetic Aperture Radar (SAR) requires the platform to fly an approximately linear trajectory (i.e. a straight flight path at a constant speed and constant altitude). Non-linear SAR technique uses a combination of platform manoeuvre and novel processing to separate the effects of a target’s ...Aug 15, 2022 · Nonlinear radars can be utilized to detect electronic devices, which are difficult to detect with conventional radars due to their small radar cross sections (RCS). Since the receiver in a nonlinear radar is designed to only receive harmonic or intermodulated echoes from electronic devices, it is able to separate electronic devices from non-electronic scatters (clutter) by rejecting their ... For the severe nonlinear chirp case with a 25.3% nonlinearity factor, the range accuracy of $137.5~\mu \text{m}$ is also successfully obtained, validating the robustness of this proposed DPTT ...Generate output samples of a nonlinear FM pulse waveform based on the stepped version of Price's waveform. The pulse width is 5e-6 seconds. The waveform performs 50 frequency steps within one pulse. The time-bandwidth products of the linear and nonlinear components are 20 and 40 respectively. The start frequency of the sweep is 15 MHz. Nonlinear radars can be utilized to detect electronic devices, which are difficult to detect with conventional radars due to their small radar cross sections (RCS).This paper presents an extensive review of nonlinear response-based radar systems. Nonlinear radars are generally used for clutter suppression purposes. These radars detect the nonlinear response generated by diodes and transistors are used as a tag for target localization.Sep 28, 2018 · Nonlinear radars are often used to detect the presence of RF electronics. In the state-of-art most of researchers has chosen to exploit the second-harmonic response of target. But its antenna is usually not impedance-matched at these harmonics, requiring that the useful signal is radiated by unintentional antennas formed by traces on the circuit board. A strong incident power is therefore ... Weather plays a significant role in our daily lives. Whether we are planning a weekend getaway or simply deciding what to wear, having accurate and up-to-date information about the weather is crucial. This is where the Storm Radar app comes...Abstract This study investigates the characteristics of mesoscale convective systems (MCSs) as a function of MCS organizational mode over China, using long-term precipitation radar observations from the Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Measurement Mission (GPM). The spaceborne radar-based MCS …We believe that this empirical formulation cannot describe the nonlinear relationship between the radar echo intensity and the rainfall rate. Therefore, random forest machine learning regression techniques are used to describe this relationship. The weather radar data and precipitation data 1 h before the prediction time are used for training.Takak Y, Hayvaci H and Yetik I (2021) A Hybrid Simulation Model for Characterization of Nonlinear Circuits Using Harmonic Radar 2021 13th International Conference on Electrical and Electronics Engineering (ELECO), 10.23919/ELECO54474.2021.9677885, 978-605-01-1437-9, (239-242)Intermodulation Radar for RF Receiver Detections. Abstract: Nonlinear radars are often used to detect the presence of RF electronics. In the state-of-art most of …In a distributed radar track fusion system, it is desired to limit the communication rate between the sensors and the central node to only the most relevant ...Taking the non-Gaussian nonlinear property of airborne radar seeker into account, we utilized a particle filter-based method to evaluate or to predict the information quality of each action candidate.3.6 Cognitive Radar Experiments. Cognitive radar experiments are exceptionally difficult to perform due to the adaptive nature of the sensing involved. In contrast to development of algorithms to be applied to already-captured data, it can be difficult to obtain appropriate data sets to prove cognitive radar concepts.A nonlinear radar can be used to locate devices whose emissions exceed permitted limits, allow security personnel to detect unauthorized radio electronics in restricted areas, or enable first ...Non-linear Synthetic Aperture Radar Conventional Synthetic Aperture Radar (SAR) requires the platform to fly an approximately linear trajectory (i.e. a straight flight path at a …Birçok kaynakça da atıflar "Soyad, İ" olarak gösterildiği için özellikle Soyad ve isminin baş harfi aynı olan akademisyenlerin atıfları zaman zaman karışabilmektedir.Furthermore, we use the random forest algorithm with predicted radar and satellite data to estimate the rainfall rate, and the results outperform those of the traditional, nonlinear radar ...Bước sóng radar càng ngắn thì độ phân giải hình ảnh trên màn radar càng rõ. Tuy nhiên các sóng radar ngắn cần nguồn năng lượng cao và định hướng, ngoài ra chúng dễ bị …Nonlinear junction detection (NLJD), a niche specialization within the field of radar, has existed since the 1970s, but this research area has experienced significant growth in the past decade. Recent applications include tracking insects and small amphibians, locating radio-frequency (RF) surveillance equipment, sensing temperature remotely,The proposed nonlinear radar can be used in protective systems, at airports, industrial enterprises, customs stations, and other objects. The radar contains a transmitter, a transmit-receive antenna, a low-frequency oscillator, and a receiver. The transmitter contains a high-frequency oscillator, a power amplifier, and a modulator. The receiver …Nonlinear radar has proven to be a viable means of detecting devices that contain electrical nonlinearities. Electrical nonlinearities are present in dissimilar metals, metal to oxide junctions, semiconductors and more. This paper presents a linear and nonlinear synthetic aperture radar (SAR) system capable of imaging linear and nonlinear targets.Takak Y, Hayvaci H and Yetik I (2021) A Hybrid Simulation Model for Characterization of Nonlinear Circuits Using Harmonic Radar 2021 13th International Conference on Electrical and Electronics Engineering (ELECO), 10.23919/ELECO54474.2021.9677885, 978-605-01-1437-9, (239-242)As weather patterns become increasingly unpredictable and severe, it’s more important than ever to stay informed and prepared. Whether you’re an avid storm chaser or simply someone who wants to be in the know about local weather conditions,...Harmonic radar (HR) is a type of nonlinear radar used to interrogate, or track a location of, a simple nonlinear target [1]. It is commonly used in applications where conventionalWeather conditions can have a significant impact on various aspects of business operations. From supply chain management to customer behavior, being aware of upcoming weather patterns can help businesses make informed decisions and optimize...The only way to obtain a kind of useful response in order to detect the PCL presence is to use a harmonic (nonlinear) radar approach [13,14,15]. Theoretically, it may be possible to obtain the harmonic response of an LNA by transmitting the sounding signal of a given frequency f 0 and measuring the response signal at 2f 0 or 3f 0 frequencies.Most of the reported nonlinear radars work by detecting the 2 nd order harmonic response 6,7 or the 3 rd order intermodulation response 8, 9 . In these radars, the nonlinear responses are close to ...Dec 21, 2019 · Signal design is an important component for good performance of radar systems. Here, the problem of determining a good radar signal with the objective of minimizing autocorrelation sidelobes is addressed, and the first comprehensive comparison of a range of signals proposed in the literature is conducted. The search is restricted to a set of nonlinear, frequency-modulated signals whose ... Oct 24, 2022 · The LFM radar is a simple system, but its impulse-response function produces a −13.25 dB sidelobe, which in turn can make the detection of weak targets difficult by drowning out adjacent weak ... The Current Radar map shows areas of current precipitation (rain, mixed, or snow). The map can be animated to show the previous one hour of radar ...Jan 1, 2010 ... By exploiting the known dependence of the characteristic spectral form of the clutter Doppler spectrum on radar frequency and other parameters, ...Apr 17, 2021 · Automatic modulation recognition plays a vital role in electronic warfare. Modern electronic intelligence and electronic support measures systems are able to automatically distinguish the modulation type of an intercepted radar signal by means of real-time intra-pulse analysis. This extra information can facilitate deinterleaving process as well as be utilized in early warning systems or give ... The Current Radar map shows areas of current precipitation (rain, mixed, or snow). The map can be animated to show the previous one hour of radar ...Nonlinear Through-the-Wall Detection Using DORT Applied With LFM Pulses. IEEE Antennas and Wireless Propagation Letters 2023-06 ... Detection of Electronic Devices Using FMCW Nonlinear Radar. Sensors 2022-08-15 | Journal article DOI: 10.3390/s22166086 Contributors ...Nonlinear radar has proven to be a viable means of detecting devices that contain electrical nonlinearities. Electrical nonlinearities are present in dissimilar metals, metal to oxide junctions, semiconductors and more. This paper presents a linear and nonlinear synthetic aperture radar (SAR) system capable of imaging linear and nonlinear targets. clutter to the radar is 1 m. The path loss from the radar to the nonlinear target is 40.50 dB, from the nonlinear target to the radar of 2nd-order harmonic radar is 46.52 dB, and from the nonlinear target to the 3rd-order harmonic radar is 50.04 dB. The radar received signal power is -78.85 dBm, and -82.2 dBm in the A nonlinear radar tailored to a set of RF electronic responses would allow security personnel to detect unauthorized radio electronics in restricted areas, or enable first-responders to pinpoint personal electronics during emergencies.Description. Nonlinear Ocean Dynamics: Synthetic Aperture Radar delivers the critical tools needed to understand the latest technology surrounding the radar imaging of nonlinear waves, particularly microwave radar, as a main source to understand, analyze and apply concepts in the field of ocean dynamic surface. BLiP will address the current immaturity of non-linear and iterative signal processing methods. Over the course of the two-year program, end-to-end radar signal processing chains will be developed, analyzed, implemented and tested – initially through non-real-time laboratory testing and culminating in real-time implementation and full-scale ...This article develops the applicability of non-linear processing techniques such as Compressed Sensing (CS), Principal Component Analysis (PCA), Iterative Adaptive Approach (IAA), and Multiple-input-multiple-output (MIMO) for the purpose of enhanced UAV detections using portable radar systems. The combined scheme has many advantages and the potential for better detection and classification ...An efficient and secure use of the electromagnetic spectrum by different telecommunications and radar systems represents, today, a focal research point, as the coexistence of different radio-frequency sources at the same time and in the same frequency band requires the solution of a non-trivial interference problem. Normally, this is addressed with diversity in frequency, space, time ...The synthesis method concerning the nonlinear frequency modulation radar signal is presented in the paper. For the radar ambiguity function calculation the Zak transform is used in the method. The ...Nonlinear radar: a historical overview and a summary of recent advancements. A broad review of publications relevant to nonlinear radar is conducted. The principle-of-operation of nonlinear radar is summarized and applications for this technology are listed. Additionally, exploiting the non-centrosymmetric nature of these crystals, we investigated the nonlinear optical response, i.e., second harmonic generation (SHG) …This paper focuses on the issue of nonlinear data filtering in radar tracking. Through the analysis on the extended Kalman filter (EKF) and the unscented Kalman filter (UKF), which are both ...May 6, 2023 · Deception jamming of synthetic aperture radar (SAR) has attracted extensive attention due to its low power consumption and high fidelity advantages. However, existing SAR deception jamming algorithms assume that SAR operates on a linear trajectory. In practice, SAR trajectories often become nonlinear due to factors such as atmospheric turbulence, which results in the jamming signals lacking ... Cognitive nonlinear radar test-bed Hedden, Abigail S.; Wikner, David A.; Martone, Anthony; McNamara, David 2013-05-31 00:00:00 Providing situational awareness to the warfighter requires radar, communications, and other electronic systems thatoperate in increasingly cluttered and dynamic electromagnetic environments. There is a growing …Moreover Radar ambiguity function (RAF) is also analysed and used for studying various performance parameters of both NLFM and LFM waveforms. Key Words: Linear frequency modulated waveform, non-linear frequency modulated waveform, radar ambiguity function. 1. INTRODUCTION In the radar literature, LFM is known to be easily Moreover Radar ambiguity function (RAF) is also analysed and used for studying various performance parameters of both NLFM and LFM waveforms. Key Words: Linear frequency modulated waveform, non-linear frequency modulated waveform, radar ambiguity function. 1. INTRODUCTION In the radar literature, LFM is known to be easilyMost effective vehicle intrusion sensor. This dual zone radar proximity sensor detects moving high density objects using RF field Disturbance Technology. Ideal for convertibles or any application where zone intrusion protection is desired ...Feb 1, 2015 · Radar tracking plays an important role in the area of early warning and detection system, whose precision is closely connected with filtering algorithm. With the development of noise jamming technology in radar echo signal, linear filtering becomes more and more difficult to satisfy the demands of radar tracking, while nonlinear filtering can solve problems such as non-Gaussian noises. A nonlinear radar can be used to locate devices whose emissions exceed permitted limits, allow security personnel to detect unauthorized radio electronics in restricted areas, or enable first ...We believe that this empirical formulation cannot describe the nonlinear relationship between the radar echo intensity and the rainfall rate. Therefore, random forest machine learning regression techniques are used to describe this relationship. The weather radar data and precipitation data 1 h before the prediction time are used for training.Apr 1, 2016 · The nonlinear radar range equation has been defi ned in the literature but a step by step derivation is lacking and no experimental validation has been shown. This paper starts with a nonlinear ... Moreover Radar ambiguity function (RAF) is also analysed and used for studying various performance parameters of both NLFM and LFM waveforms. Key Words: Linear frequency modulated waveform, non-linear frequency modulated waveform, radar ambiguity function. 1. INTRODUCTION In the radar literature, LFM is known to be easily the traditional, nonlinear radar reflectivity factor and rainfall rate (Z–R) relationships that use logarithmic functions. The experiments confirm that machine learning with multisource data provides more reasonable predictions and reveals a bet-ter nonlinear relationship between radar echo and precipita-tion rate.Sep 1, 2006 · Abstract. Nonlinear FM waveforms offer a radar matched filter output with inherently low range sidelobes. This yields a 1-2 dB advantage in Signal-to-Noise Ratio over the output of a Linear FM waveform with equivalent sidelobe filtering. This report presents design and implementation techniques for Nonlinear FM waveforms. The state of the art in nonlinear radar is conveyed by presenting high-level system architecture, explaining the rationale behind design decisions pertaining to that architecture, and listing the ...supply power [20]. Table 1 summarizes the three nonlinear radars and their characteristics. In this paper, a new nonlinear radar is designed based on the principle of intermodulation to separate clutter from the target of interest. This intermodulation radar can overcome some drawbacks of harmonic radars. Its 3rd-order tones are close toTakak Y, Hayvaci H and Yetik I (2021) A Hybrid Simulation Model for Characterization of Nonlinear Circuits Using Harmonic Radar 2021 13th International Conference on Electrical and Electronics Engineering (ELECO), 10.23919/ELECO54474.2021.9677885, 978-605-01-1437-9, (239-242)Nonlinear radar exploits the difference in frequency between radar waves that illuminate and are reflected from electromagnetically nonlinear targets. Harmonic radar is a special type of nonlinear ...modeling [16]. These methods are useful for describing interconnected dynamic nonlinear circuit elements, for instance, but are not used in harmonic radar applications. Another aspect in harmonic radar is the influence of surrounding objects and the measurement environment, both viewed as having a strictly linear scattering behavior.a nonlinear radar antenna, as inclusion of external matching. networks should largely be avoided due to the lik ely generation. of harmonics [18]. In order to tailor the antenna for nonlinear.Additionally, exploiting the non-centrosymmetric nature of these crystals, we investigated the nonlinear optical response, i.e., second harmonic generation (SHG) …In this paper, a new nonlinear radar is designed based on the principle of intermodulation to separate clutter from the target of interest. This intermodulation radar can overcome some drawbacks of harmonic radars. Its 3rd-order tones are close to the fundamental tones, sharing almost the same path loss as theThe target tracking of nonlinear maneuvering radar in dense clutter environments is still an important but difficult problem to be solved effectively. Traditional solutions often rely on motion models and prior distributions. This paper presents a novel improved architecture of Kalman filter based on a recursive neural network, which combines the sequence learning of recurrent neural networks ... Nonlinear radar has proven to be a viable means of detecting devices that contain electrical nonlinearities. Electrical nonlinearities are present in dissimilar metals, metal to oxide junctions, semiconductors and more. This paper presents a linear and nonlinear synthetic aperture radar (SAR) system capable of imaging linear and nonlinear targets. The radar range equation for detecting targets using linear radar has been defined and derived many times for many different applications. The nonlinear radar range equation has been defined in the literature but a step by step derivation is lacking and no experimental validation has been shown. . Not sure where to start? From the underrated animBased on the engaged senses, multimedia can be five main typ a nonlinear radar antenna, as inclusion of external matching. networks should largely be avoided due to the lik ely generation. of harmonics [18]. In order to tailor the antenna for nonlinear.generated nonlinear response is sent back to the radar’s receiver. This implies that a small tag with optimum conversion loss may reflect more nonlinear response than a large tag with a high conversion loss. Hence, the path loss model of the nonlinear radar can be estimated using the Friis transmission equation as: Radar to tag: Prt1 = Pt1 ... Nonlinear radar exploits the difference in frequency b Nonlinear radars detect nonlinear (harmonic or intermodulation) responses excited from semiconductor junctions within electronic targets, allowing for the detection … In this paper, a new nonlinear radar is designed based on the...

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