Showing 1-25 of 6,881 resultsfor "Index Terms":Frequency-modulated Continuous-wave Radar
"Index Terms":Frequency-modulated Continuous-wave Radar
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Low-Terahertz Radar Image Analysis for Road Obstacles
2021 33rd Chinese Control and Decision Conference (CCDC)
Year: 2021 | Conference Paper |
At present, laser radar is main studied in the in automotive sensing. However, Driverless cars have higher request for different environment and light conditions. It is even difficult for lidar to find tiny targets on the road, such as pits and packets. In the paper, The low-terahertz high-resolution imaging radar system operating frequency is 94GHz, Using the frequency-modulated continuous-wave (...Show More
A Miniaturized Ultra-Wideband Radar for UAV Remote Sensing Applications
Feras Abushakra;Nathan Jeong;Deepak N. Elluru;Abhishek K. Awasthi;Shriniwas Kolpuke;Tuan Luong;Omid Reyhanigalangashi;Drew Taylor;S. Prasad Gogineni
This letter presents a novel approach to build a compact lightweight unmanned aerial vehicle (UAV) radar for remote sensing applications. The proposed radar exploits the recent advancement of an automotive radar chip for broadband chirp generation and rapid data processing. To compensate for the path losses and improve penetration at the millimeter-wave (mm-wave) frequency range, up- and down-conv...Show More
UAV-Borne FMCW InSAR for Focusing Buried Objects
Ralf Burr;Markus Schartel;Alexander Grathwohl;Winfried Mayer;Thomas Walter;Christian Waldschmidt
Antipersonnel mines are hidden weapons that are usually buried close to the surface and are triggered by a foot step of the victim. A sensor that is able to detect minimum metal mines is a ground penetrating synthetic aperture radar (GPSAR). In previous work, an unmanned aerial vehicle (UAV)-based GPSAR was developed and tested for the detection of buried landmines. The real topography was neglect...Show More
A radar system for indoor human localization and breath monitoring
2018 IEEE International Symposium on Medical Measurements and Applications (MeMeA)
Year: 2018 | Conference Paper |
Cited by: Papers (23)
This paper presents the study of a radar system for indoor human localization and vital signs monitoring. The article illustrates different solutions including linear frequency-modulated continuous-wave (FMCW) mode and recently proposed hybrid schemes, combining FMCW and continuous-wave (CW) interferometry modes. A new operating modality based on the use of the phase variations of the demodulated ...Show More
Airborne Tripwire Detection Using a Synthetic Aperture Radar
Markus Schartel;Ralf Burr;Winfried Mayer;Christian Waldschmidt
Antipersonnel fragmentation mines are relatively large metallic mines, which are only partially buried and often triggered by a metallic tripwire. In humanitarian mine clearance, the search for the wires is usually carried out manually. As a new approach, an airborne system for the detection of tripwires using a synthetic aperture radar is presented. The system consists of an industrial multicopte...Show More
A Compact Multi-mode Integrated Doppler radar at 2.4 GHz for Multipurpose Applications
Pallab Kumar Gogoi;Mrinal Kanti Mandal;Ayush Kumar;Tapas Chakravarty
2022 IEEE Wireless Antenna and Microwave Symposium (WAMS)
Year: 2022 | Conference Paper |
This paper presents a new architecture of a compact multimode FMCW radar for general purpose short-range applications. The radar can operate in CW as well as in FMCW modes. The transmitted RF frequency or frequency range can be arbitrarily selected using an inbuilt SPI control over 2.25-2.50 GHz with a frequency resolution of at least 100 kHz. A modified VCO-PLL loop with a stable reference source...Show More
A 94 GHz frequency-modulated continuous-wave radar with a 3-element array receiver is developed as a base for creating a focal-plane array imaging system with higher range. Each array element consists of a low-barrier Schottky diode that is mounted on a modified slot antenna, with the array pitch of about 4 mm. The intermediate frequency current of the diode is transformed to the output voltage wi...Show More
RangeSRN: Range Super-Resolution Network Using mmWave FMCW Radar
GLOBECOM 2022 - 2022 IEEE Global Communications Conference
Year: 2022 | Conference Paper |
Designing a signal-processing algorithm for frequency-modulated continuous-wave (FMCW) radar applications with advanced functionality remains a challenging problem. Specifically, traditional algorithms improve detection resolution by increasing bandwidth and contribute to inefficient spectral use and maximum range reduction. To strike a balance between the maximum detection range and range resolut...Show More
Compressive Sampling of Polarimetric Doppler Weather Radar Processing Via Inverse Fast Fourier Transform
Rita Purnamasari;Andriyan Bayu Suksmono;Irma Zakia;Ian Joseph Matheus Edward
Polarimetric Doppler frequency-modulated continuous-wave weather radar produces a tremendous amount of data during the observation of atmospheric conditions. Using conventional signal processing method, the beat signals are sampled at Nyquist rate, so that the range signal can be reconstructed perfectly. We propose compressive sampling (CS) technique to sample and reduce the data simultaneously by...Show More
The New Italian Airborne Multiband Interferometric and Polarimetric SAR (MIPS) System: First Flight Test Results
A. Natale;P. Berardino;C. Esposito;G. Palmese;R. Lanari;S. Perna
IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium
Year: 2022 | Conference Paper |
Cited by: Papers (9)
In recent years, airborne Synthetic Aperture Radar (SAR) remote sensing is becoming more and more attractive, thanks to the operational flexibility and observation capabilities provided by aerial SAR systems, and also due to the comparatively low-cost of these radar devices. In this work, we show the preliminary results relevant to the first acquisition campaign of the new Italian airborne Multiba...Show More
W-Band MIMO FMCW Radar System With Simultaneous Transmission of Orthogonal Waveforms for High-Resolution Imaging
Se-Yeon Jeon;Min-Ho Ka;Seungha Shin;Munsung Kim;Seok Kim;Sumin Kim;Jeongbae Kim;Aulia Dewantari;Jaeheung Kim;Hansup Chung
This paper presents a multi-input multi-output (MIMO) radar with simultaneously transmitted orthogonal waveforms. The radar operates in W-band, 93.5-94.5 GHz, with frequency-modulated continuous wave (FMCW) signals. The radar is designed to be capable of simultaneous transmission rather than switching transmit channels. A suitable orthogonal waveform transmission method for the FMCW radar is selec...Show More
An S-Band CMOS Mixer-First Single-RF-Port Duplexing FMCW Radar
2019 IEEE MTT-S International Microwave Symposium (IMS)
Year: 2019 | Conference Paper |
Cited by: Papers (1)
A mixer-first single-RF-port duplexing RF frontend is proposed and implemented for frequency-modulated continuous-wave (FMCW) radar applications in this paper. The RF frontend is a bidirectional simultaneous frequency up-and-down converter. Equations of basic parameters of the frontend are derived to provide design criteria. The proposed radar architecture has been evaluated with an S-band (3.3-3....Show More
Radar Sensors (24 and 80 GHz Range) for Level Measurement in Industrial Processes
2018 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)
Year: 2018 | Conference Paper |
Cited by: Papers (34)
The measurement of the filling level of liquid and solid goods in storage, process, and other tanks and silos is an important task in many industries. Examples of liquids are oil, gasoline, various chemicals and pharmaceuticals, water, and beverages. Also, a large variety of bulk solids can be given, for example fine granulated solids like flour, sugar, sand, grains, and various powders. Examples ...Show More
This letter presents a novel system to perform range detections using an artificial neural network on the time-domain baseband signal of frequency-modulated continuous wave radar sensors. The network is trained and evaluated with synthetic signals, which are generated with a point target simulator. To evaluate the performance of the proposed approach, it is compared with an order statistics consta...Show More
Real-time Monitoring of Vital Signs based on Miniaturized Ultra-wideband Radar
2022 IEEE MTT-S International Microwave Biomedical Conference (IMBioC)
Year: 2022 | Conference Paper |
Cited by: Papers (3)
This paper presents a miniaturized ultra-wideband frequency-modulated continuous-wave radar for health monitoring purpose. The radio frequency (RF) front-end and digital processing back-end are integrated into a single PCB, which is quite compact and portable. Experiment for real-time monitoring of human vital signs is implemented to verify the performance of the radar.Show More
W-Band FMCW MIMO Radar System for High-Resolution Multimode Imaging With Time- and Frequency-Division Multiplexing
Se-Yeon Jeon;Sumin Kim;Jeongbae Kim;Seok Kim;Seungha Shin;Munsung Kim;Min-Ho Ka
A W-band multiple-input multiple-output (MIMO) radar imaging system has been proposed. The 4 × 4 radar system that forms a 2-D virtual array operates at a center frequency of 94 GHz and bandwidth of 1 GHz with frequency-modulated continuous wave. A hybrid scheme comprising time- and frequency-division multiplexing is introduced for establishing orthogonal waveforms, where the transmit channels per...Show More
Phase-Based Human Target 2-D Identification With a Mobile FMCW Radar Platform
Jiaming Yan;Gepeng Zhang;Hong Hong;Hui Chu;Changzhi Li;Xiaohua Zhu
Identifying and locating human targets in a complex environment with a mobile radar platform are important for urban rescue missions. This article introduces a precise phase-based human target 2-D synthetic-aperture radar (SAR) imaging and recognition system based on vital sign tracking with a mobile frequency-modulated continuous-wave (FMCW) radar. The solution first relies on FMCW phase detectio...Show More
Nonlinearity-Compensated Short-Range FMCW Radar for Weak Target Imaging
Samin Ebrahim Sorkhabi;Rouhollah Feghhi;Alan Lim;Karumudi Rambabu
An easily implementable, low-cost, and portable broadband frequency-modulated continuous wave (FMCW) synthetic aperture radar (SAR) system is presented for short-range imaging applications. Design considerations and radar performance metrics are discussed in detail while investigating systematic and nonsystematic performance-limiting factors. This article introduces a signal processing procedure b...Show More
Vital-SAR-Imaging With a Drone-Based Hybrid Radar System
Jiaming Yan;Zhengyu Peng;Hong Hong;Hui Chu;Xiaohua Zhu;Changzhi Li
Full-coverage synthetic-aperture radar (SAR) imaging and human target identification in complex scenes are very important for security and rescue applications. In this paper, a drone-based vital-SAR-imaging hybrid radar system is proposed to realize targets' imaging and human identification simultaneously. Carried by an operational custom-built drone with a designed S-shaped trajectory, 2-D SAR im...Show More
River Surface Analysis and Characterization Using FMCW Radar
Marc A. Mutschler;Philipp A. Scharf;Patrick Rippl;Timo Gessler;Thomas Walter;Christian Waldschmidt
Today’s warning systems for floods or droughts require sensor applications that provide a vast array of information. Current systems provide insight into either the water level or the river velocity. In order to obtain additional parameters for the characterization of the flow behavior in a noncontact manner, a frequency-modulated continuous-wave radar with chirp sequence is used. Since these sens...Show More
D-Band FMCW Radar with sub-cm Range Resolution based on a BiCMOS mm Wave IC
Wael A. Ahmad;Maciej Kucharski;Herman Jalli Ng;Dietmar Kissinger
This paper demonstrates a sub-cm range resolution of a D-band (110–170 GHz) radar based on a bistatic BiCMOS mmWave IC with on-chip antennas. A wideband ring voltage-controlled oscillator (VCO) is utilized to generate a 20 GHz sweep bandwidth which translates to a frequency-modulated continuous-wave (FMCW) modulation bandwidth of 80 GHz by means of a built-in quadrupler in the radar transceiver ch...Show More
A Novel Radar Imaging Method Based on Random Illuminations Using FMCW Radar
2020 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNeT)
Year: 2020 | Conference Paper |
Compressed Sensing (CS) has provided a viable approach to undersample a sparse signal and reconstruct it perfectly. In this paper, the simulation results of a frequency-modulated continuous-wave (FMCW) radar, which employs a CS based data acquisition and reconstruction algorithm to recover a sparse 2-D target frame using fewer number of scans are presented. A 16-element antenna array based on digi...Show More
Modified range-Doppler processing for FM-CW synthetic aperture radar
The combination of compact frequency-modulated continuous-wave (FM-CW) technology and high-resolution synthetic aperture radar (SAR) processing techniques should pave the way for the development of a lightweight, cost-effective, high-resolution, airborne imaging radar. Regarding FM-CW SAR signal processing, the motion during the transmission of a sweep and the reception of the corresponding echo w...Show More
Integration of SPDT Antenna Switch With CMOS Power Amplifier and LNA for FMICW Radar Front End
A single-pole double-throw antenna switch integrated with a CMOS power amplifier (PA) and a low-noise amplifier (LNA) by using a three-piece transmission line transformer (TLT) for a frequency-modulated interrupted continuous-wave (FMICW) radar front end is presented. The three-piece TLT consists of a PA output TL, an LNA input TL, and a TL connected to an antenna. Parallel switches and λ/4 effect...Show More
In this paper, we propose an air-writing method in a millimeter-wave band radar system. In particular, a method for removing undesired detection results due to a hand movement is proposed. In our experiments, we use a frequency-modulated continuous wave (FMCW) radar system using 62 GHz as the center frequency and 3 GHz as the bandwidth, which has a range resolution of several centimeters. After in...Show More
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