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Literatura académica sobre el tema "FMCW Radar"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de enero de 2025

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Artículos de revistas sobre el tema "FMCW Radar"

Wang, Dingyang, Sungwon Yoo y Sung Ho Cho. "Experimental Comparison of IR-UWB Radar and FMCW Radar for Vital Signs". Sensors 20, n.º 22 (23 de noviembre de 2020): 6695. http://dx.doi.org/10.3390/s20226695.

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In this paper, we compare the performances of impulse radio ultra-wideband (IR-UWB) and frequency modulation continuous wave (FMCW) radars in measuring noncontact vital signs such as respiration rate and heart rate. These two type radars have been widely used in various fields and have shown their applicability to extract vital signs in noncontact ways. IR-UWB radar can extract vital signs using distance information. On the other hand, FMCW radar requires phase information to estimate vital signs, and the result can be enhanced with Multi-input Multi-output (MIMO) antenna topologies. By using commercial radar chipsets, the operation of radars under different conditions and frequency bands will also affect the performance of vital sign detection capabilities. We compared the accuracy and signal-to-noise (SNR) ratios of IR-UWB and FMCW radars in various scenarios, such as distance, orientation, carotid pulse, harmonics, and obstacle penetration. In general, the IR-UWB radars offer a slightly better accuracy and higher SNR in comparison to FMCW radar. However, each radar system has its own unique advantages, with IR-UWB exhibiting fewer harmonics and a higher SNR, while FMCW can combine the results from each channel.

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Cha, Kyuho, Sooyoung Oh, Hayoung Hong, Hongsoo Park y Sun K. Hong. "Detection of Electronic Devices Using FMCW Nonlinear Radar". Sensors 22, n.º 16 (15 de agosto de 2022): 6086. http://dx.doi.org/10.3390/s22166086.

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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 echoes at fundamental frequencies. This paper presents a harmonic-based nonlinear radar scheme utilizing frequency-modulated continuous-wave (FMCW) signals for the detection of various electronic devices at short range. Using a laboratory experiment setup for FMCW radar at S-band for Tx (C-band for Rx), measurements are carried out to detect electronic devices of various sizes. The results show that the detection of small electronic devices is possible with nonlinear FMCW radar when appropriate system parameters are selected. Furthermore, we also discuss the maximum detectable range estimation for electronic targets using the radar range equation for FMCW nonlinear radar.

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Caffa, Mattia, Francesco Biletta y Riccardo Maggiora. "Binary-Phase vs. Frequency Modulated Radar Measured Performances for Automotive Applications". Sensors 23, n.º 11 (1 de junio de 2023): 5271. http://dx.doi.org/10.3390/s23115271.

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Radars have been widely deployed in cars in recent years, for advanced driving assistance systems. The most popular and studied modulated waveform for automotive radar is the frequency-modulated continuous wave (FMCW), due to FMCW radar technology’s ease of implementation and low power consumption. However, FMCW radars have several limitations, such as low interference resilience, range-Doppler coupling, limited maximum velocity with time-division multiplexing (TDM), and high-range sidelobes that reduce high-contrast resolution (HCR). These issues can be tackled by adopting other modulated waveforms. The most interesting modulated waveform for automotive radar, which has been the focus of research in recent years, is the phase-modulated continuous wave (PMCW): this modulated waveform has a better HCR, allows large maximum velocity, permits interference mitigation, thanks to codes orthogonality, and eases integration of communication and sensing. Despite the growing interest in PMCW technology, and while simulations have been extensively performed to analyze and compare its performance to FMCW, there are still only limited real-world measured data available for automotive applications. In this paper, the realization of a 1 Tx/1 Rx binary PMCW radar, assembled with connectorized modules and an FPGA, is presented. Its captured data were compared to the captured data of an off-the-shelf system-on-chip (SoC) FMCW radar. The radar processing firmware of both radars were fully developed and optimized for the tests. The measured performances in real-world conditions showed that PMCW radars manifest better behavior than FMCW radars, regarding the above-mentioned issues. Our analysis demonstrates that PMCW radars can be successfully adopted by future automotive radars.

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Bhutani, Akanksha, Sören Marahrens, Michael Gehringer, Benjamin Göttel, Mario Pauli y Thomas Zwick. "The Role of Millimeter-Waves in the Distance Measurement Accuracy of an FMCW Radar Sensor". Sensors 19, n.º 18 (12 de septiembre de 2019): 3938. http://dx.doi.org/10.3390/s19183938.

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High-accuracy, short-range distance measurement is required in a variety of industrial applications e.g., positioning of robots in a fully automated production process, level measurement of liquids in small containers. An FMCW radar sensor is suitable for this purpose, since many of these applications involve harsh environments. Due to the progress in the field of semiconductor technology, FMCW radar sensors operating in different millimeter-wave frequency bands are available today. An important question in this context, which has not been investigated so far is how does a millimeter-wave frequency band influence the sensor accuracy, when thousands of distance measurements are performed with a sensor. This topic has been dealt with for the first time in this paper. The method used for analyzing the FMCW radar signal combines a frequency- and phase-estimation algorithm. The frequency-estimation algorithm based on the fast Fourier transform and the chirp-z transform provides a coarse estimate of the target distance. Subsequently, the phase-estimation algorithm based on a cross-correlation function provides a fine estimate of the target distance. The novel aspects of this paper are as follows. First, the estimation theory concept of Cramér-Rao lower bound (CRLB) has been used to compare the accuracy of two millimeter-wave FMCW radars operating at 60 GHz and 122 GHz. In this comparison, the measurement parameters (e.g., bandwidth, signal-to-noise ratio) as well as the signal-processing algorithm used for both the radars are the same, thus ensuring an unbiased comparison of the FMCW radars, solely based on the choice of millimeter-wave frequency band. Second, the improvement in distance measurement accuracy obtained after each step of the combined frequency- and phase-estimation algorithm has been experimentally demonstrated for both the radars. A total of 5100 short-range distance measurements are made using the 60 GHz and 122 GHz FMCW radar. The measurement results are analyzed at various stages of the frequency- and phase-estimation algorithm and the measurement error is calculated using a nanometer-precision linear motor. At every stage, the mean error values measured with the 60 GHz and 122 GHz FMCW radars are compared. The final accuracy achieved using both radars is of the order of a few micrometers. The measured standard deviation values of the 60 GHz and 122 GHz FMCW radar have been compared against the CRLB. As predicted by the CRLB, this paper experimentally validates for the first time that the 122 GHz FMCW radar provides a higher repeatability of micrometer-accuracy distance measurements than the 60 GHz FMCW radar.

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Park, Kyungeun, Jeongpyo Lee y Youngok Kim. "Deep Learning-Based Indoor Two-Dimensional Localization Scheme Using a Frequency-Modulated Continuous Wave Radar". Electronics 10, n.º 17 (5 de septiembre de 2021): 2166. http://dx.doi.org/10.3390/electronics10172166.

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In this paper, we propose a deep learning-based indoor two-dimensional (2D) localization scheme using a 24 GHz frequency-modulated continuous wave (FMCW) radar. In the proposed scheme, deep neural network and convolutional neural network (CNN) models that use different numbers of FMCW radars were employed to overcome the limitations of the conventional 2D localization scheme that is based on multilateration methods. The performance of the proposed scheme was evaluated experimentally and compared with the conventional scheme under the same conditions. According to the results, the 2D location of the target could be estimated with a proposed single radar scheme, whereas two FMCW radars were required by the conventional scheme. Furthermore, the proposed CNN scheme with two FMCW radars produced an average localization error of 0.23 m, while the error of the conventional scheme with two FMCW radars was 0.53 m.

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Zhao, Hangyu, Yeping Lai, Yuhao Wang y Hao Zhou. "High-Frequency Radar Cross Section of Ocean Surface for an FMICW Source". Journal of Marine Science and Engineering 9, n.º 4 (15 de abril de 2021): 427. http://dx.doi.org/10.3390/jmse9040427.

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The frequency-modulated interrupted continuous waveform (FMICW) has been widely used in remotely sensing sea surface states by high-frequency ground wave radar (HFGWR). However, the radar cross section model of the sea surface for this waveform has not yet been presented. Therefore, the first- and second-order cross section models of the sea surface about this waveform are derived in this study. The derivation begins with the general electric field equations. Subsequently, the FMICW source is introduced as the radar transmitted signal to obtain the FMICW-incorporated backscattered electric field equations. These equations are used to calculate range spectra by Fourier transforming. Therefore, Fourier transformation of the range spectra calculated from successive sweep intervals gives the Doppler spectra or the power spectral densities. The radar cross section model is obtained by directly comparing the Doppler spectra with the standard radar range equation. Moreover, the derived first- and second-order radar cross section models for an FMICW source are simulated and compared with those for a frequency-modulated continuous waveform (FMCW) source. Results show that the cross section models for the FMICW and FMCW cases have different analytical expressions but almost the same numerical results.

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Pal, Surendra. "FMCW – Radar Design". IETE Journal of Research 65, n.º 4 (11 de junio de 2019): 576–77. http://dx.doi.org/10.1080/03772063.2019.1615392.

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Bhutani, Akanksha, Sören Marahrens, Marius Kretschmann, Serdal Ayhan, Steffen Scherr, Benjamin Göttel, Mario Pauli y Thomas Zwick. "Applications of radar measurement technology using 24 GHz, 61 GHz, 80 GHz and 122 GHz FMCW radar sensors". tm - Technisches Messen 89, n.º 2 (2 de diciembre de 2021): 107–21. http://dx.doi.org/10.1515/teme-2021-0034.

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Abstract This paper presents a review of radar applications in high-accuracy distance measurement of a target. The radars included in this review are frequency modulated continuous wave (FMCW) radar sensors operating in four different millimeter-wave frequency bands, namely 24 GHz, 61 GHz, 80 GHz and 122 GHz. The radar sensors are used to measure the distance of standard and complex targets in a short range of a few meters, thus indicating that the choice of target and the medium used for radar signal propagation also play a key role in determining the distance measurement accuracy of an FMCW radar. The standard target is a trihedral corner reflector in a laboratory-based free space measurement setup and the complex targets include a piston in an oil-filled hydraulic cylinder and a planar positioning stage used in micromachining. In each of these measurement scenarios, a distance measurement accuracy in micrometer range is achieved due to the use of a sophisticated signal processing algorithm that is based on a combined frequency and phase estimation method. The paper is concluded with a technical comparison of the accuracy achieved by the FMCW radars reviewed in this article with other related works.

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Gu, Shanshan, Guangrong Xi, Lingyu Ge, Zhong Yang, Yizhi Wang, Weina Chen y Zhenzhong Yu. "Compressed Sensing for THz FMCW Radar 3D Imaging". Complexity 2021 (26 de agosto de 2021): 1–10. http://dx.doi.org/10.1155/2021/5576782.

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A terahertz (THz) frequency-modulated continuous wave (FMCW) imaging radar system is developed for high-resolution 3D imaging recently. Aiming at the problems of long data acquisition periods and large sample sizes for the developed imaging system, an algorithm based on compressed sensing is proposed for THz FMCW radar 3D imaging in this paper. Firstly, the FMCW radar signal model is built, and the conventional range migration algorithm is introduced for THz FMCW radar imaging. Then, compressed sensing is extended for THz FMCW radar 3D imaging, and the Newton smooth L0-norm (NSL0) algorithm is presented for sparse measurement data reconstruction. Both simulation and measurement experiments demonstrate the feasibility of reconstructing THz images from measurements even at the sparsity rate of 20%.

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Milovanovic, Vladimir. "On fundamental operating principles and range-doppler estimation in monolithic frequency-modulated continuous-wave radar sensors". Facta universitatis - series: Electronics and Energetics 31, n.º 4 (2018): 547–70. http://dx.doi.org/10.2298/fuee1804547m.

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The diverse application areas of emerging monolithic noncontact radar sensors that are able to measure object?s distance and velocity is expected to grow in the near future to scales that are now nearly inconceivable. A classical concept of frequency-modulated continuous-wave (FMCW) radar, tailored to operate in the millimeter-wave (mm-wave) band, is well-suited to be implemented in the baseline CMOS or BiCMOS process technologies. High volume production could radically cut the cost and decrease the form factor of such sensing devices thus enabling their omnipresence in virtually every field. This introductory paper explains the key concepts of mm-wave sensing starting from a chirp as an essential signal in linear FMCW radars. It further sketches the fundamental operating principles and block structure of contemporary fully integrated homodyne FMCW radars. Crucial radar parameters like the maximum unambiguously measurable distance and speed, as well as range and velocity resolutions are specified and derived. The importance of both beat tones in the intermediate frequency (IF) signal and the phase in resolving small spatial perturbations and obtaining the 2-D range-Doppler plot is pointed out. Radar system-level trade-offs and chirp/frame design strategies are explained. Finally, the nonideal and second-order effects are commented and the examples of practical FMCW transmitter and receiver implementations are summarized.

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Tesis sobre el tema "FMCW Radar"

Icoz, Dilsad. "Milimeterwave Fmcw Radar Design". Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611385/index.pdf.

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In traffic radar system, Frequency Modulated Continuous Wave (FMCW) will be used since these radars are preferred in short distance and high range resolution systems. The system to be constructed is not only a system operating with Doppler principle and detection of speed
on the contrary a functional radar is planned to be produced. In various traffic radars in use, Doppler shift constituted by the targets causing high reflection within detection field is measured and the measured speed corresponding to this shift is seen to exceed the limits. In case of cars more than one, their speeds cannot be measured separately. In this FMCW Radar system, it is possible to identify the targets&rsquo
distance and speed. The speed information of the target will be specified by Doppler frequency and also as a result of position monitoring, the speed will be determined out of the position change occurring in the unit time. These features, in multi lane road, will be used both for different lanes and also for the cars moving at the same lane but in different ranges. The radar system designed in this study is an easy to use, low power consuming device which can be mounted into the car. Only the active part of the system is off the shelf products and the other RF cards are designed and produced. As a result, a low cost traffic radar will be produced

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Vural, Aydin. "Fmcw Radar Altimeter Test Board". Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/1219526/index.pdf.

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In this thesis, principles of a pulse modulated frequency modulated continuous wave radar is analyzed and adding time delay to transmitted signal in the laboratory environment performed. The transmitted signal from the radar has a time delay for traveling the distance between radar and target. The distance from radar to target is more than one kilometers thus test of the functionality of the radar in the laboratory environment is unavailable. The delay is simulated regarding to elapsed time for the transmitted signal to be received. This delay achieved by using surface acoustic wave (SAW) delay line in the laboratory environment. The analyses of the components of the radar and the delay line test board are conducted.

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Eriksson, Oscar. "Filterdesign och hårdvarukonstruktion för FMCW-radar". Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7988.

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Den här högskoleavhandlingen beskriver designen av ett IF-filter samt hårdvarukonstruktion av en ny 77 GHz FMCW-radar demonstrator. Syftet med demonstratorn är att illustrera hur kisel germanium-, SiGe, teknologi kan användas istället för den mer vedertagna men dyrare gallium arsenik-, GaAs, teknologin. Den gamla radar-prototypen vilken Acreo AB utvecklat är funktionell men behöver konstrueras om för att bättre kunna utvärdera radarprestandan. I avhandlingen presenteras grundläggande radarteori och ekvationer för att underlätta förståelsen av de olika systemblocken. Rapporten beskriver också systemarkitekturen och hur dess funktionalitet kommer att testas. Det omdesignade IF-filtret har simulerats i en PSpice-simulator och ett prototypkort av detta har tillverkats för mätningar. Ett 4-lagers kretskort av hela systemet har tagits fram i Orcad Layout. Slutligen innehåller rapporten förslag på förbättringar till nästa demonstratorversion.

This bachelor thesis describes the design of an IF-filter and the hardware construction of a new version of a 77 GHz FMCW-radar demonstrator. The purpose of the demonstrator is to illustrate how the silicon germanium-, SiGe, technology could be used instead of the more conventional but also much more expensive gallium arsenide-, GaAs, technology. The old radar prototype that Acreo AB has developed is fully functional but needs to be redesigned to be able to evaluate the radar performance in a better way. The thesis presents the basic radar theory and equations to help understanding the construction of the system blocks. The report also describes the system architecture and how its functionality should be tested. The redesigned IF-filter has been simulated in a PSpice simulator and a prototype has been manufactured and measured. A 4-layer PCB-board of the whole system was done in Orcad Layout. Finally the report is concluded with suggestions on improvements for the next demonstrator version.

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Chen, Hung-Ruei. "FMCW radar jamming techniques and analysis". Thesis, Monterey California. Naval Postgraduate School, 2013. http://hdl.handle.net/10945/37597.

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Approved for public release; distribution is unlimited
Frequency-Modulated Continuous-Wave (FMCW) radar is a type of Low Probability of Intercept radar system that is being heavily investigated in the military. Not only is its transmission difficult to be detected by enemy intercept receivers, but FMCW radar has the inherent capability of increasing coherent signal power while suppressing noise power during its receive signal processing. This thesis investigates the jamming effectiveness of selected jamming waveforms by injecting the interfering signals into the Lab-Volt Radar Training System (LVRTS). The jamming effect is evaluated based on the change in beat frequency due to the jamming. Due to the hardware limitations of the LVRTS, a MATLAB simulation model is also constructed for advanced electronic attack testing. The MATLAB model emulates the FMCW emitter digital signal processing response to coherent and non-coherent jamming signals under an anti-ship capable missile scenario. The simulation output is the target range and range rate, whose error measures quantify the jamming effectiveness. From the standpoint of electronic warfare, related subjects such as electronic warfare support measures and FMCW electronic protection are also discussed.

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Zhang, X. "Modelling of FMCW ground penetrating radar". Thesis, University of Bath, 1997. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760700.

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Bas, Alon. "An ultra high resolution FMCW radar". Master's thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/8357.

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Bibliography: leaves 127-128.
There is a great need for real-time non-intrusive measurements in industry. A short-range radar system can be used to make these measurements. A standard requirement for these type of applications is high resolution. This is a standard problem in radar. Using classical signal processing techniques, the range resolution is proportional to the bandwidth of the transmitted signal. This poses a serious problem in radar as very large bandwidths are required - typically lSOGHz for 1 mm range resolution. Alternative techniques have been sought which do not rely on large transmitted bandwidths, but which rely on large signal-to-noise ratio (SNR). Such techniques exist in modem spectral analysis eg. auto-regressive techniques. These techniques model the data. In other words, they assume a priori information. Linear frequency-modulated continuous-wave (FMCW) radar was utilized, since a pulsed radar would require very precise time measurements due to the short range (a few ns). The FMCW radar would have to be very linear for the modelling process to work properly. The frequency domain measurement of the received system data would then be proportional to range. An FMCW radar system was built and tested. The modem signal processing techniques were found to work well when injected with sinusoidal signals from signal generators. The hardware was also found to perform satisfactorily. However, amplitude modulation was observed in the mixing process and subsequently, the modelling process did not perform satisfactorily when interfaced to the hardware. Due to the amplitude modulation problem, two closely-spaced targets disrupted the high resolution properties of the modelling process. Nevertheless, a single target could be resolved within a resolution bin of better than 1 cm. A solution is proposed in chapter eight, however, it is out of the scope of this thesis.

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Mohd, Isa F. N. "Antenna system design for FMCW avalanche radar". Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1356841/.

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Avalanches pose a significant threat to human life and settlements, hence their study is key in formulating settlement risk zones. Validating models of avalanches, developed to predict their behaviour, are limited by the quality of current field data. University College London (UCL) has developed a sophisticated FMCW phased array raday with sub-metre range resolution for imaging avalanches. The radar is installed in a bunker in an avalanche test facility in Valleé de La Sionne (VDLS) and has been gathering data since winter 2009. Due to space constraint and destructive issues with the bunker, a design for compact, low-cost and directive antenna is crucial to be used with the avalanche radar. This thesis documents the theory, analysis, design and measurement of the compact, low-cost and directive antennas. First, the parameter and location of VDLS is scrutinized to determine the characteristics that needs to be fulfilled when designing the antennas. Some of the parameters that were looked into are the operating frequency, the beamwidth of the antenna and the effects of placing the antenna in an array. Then, the study of the first antenna, a multilayer microstrip patch antenna with novel feeding method is presented. The directive concept of the antenna is obtained using an array of 4 x 2 patches, with increased antenna height and a novel feeding technique. The antenna is then fabricated using Rogers RT Duroid 5880 and assembled to be measured and compared with the simulated version. The second antenna proposed in this thesis is an array of microstrip Yagi antenna. The directive concept of this antenna is achieved through the design of the microstrip Yagi antenna itself and applying the antenna in an array of linear arrangement. The antenna is then fabricated using Rogers RT Duroid 5880 and compared with the simulated version. Finally, the first antenna characteristics is being exploited in series of Matlab program to estimate the antenna performance in a sparsely-populated phased array system. It has been demonstrated experimentally and through measurement that the antenna system design is suitable for the application of FMCW avalanche radar.

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Zhu, Qizhao y Yaqi Wang. "FMCW radar implemented with GNU Radio Companion". Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-52985.

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Continuous-wave frequency-modulated radar, or FMCW radar, is simple in design, small in size and weight and uses low transmitting power. The range resolution depends on the bandwidth. FMCWradar is used in applications ranging from guided weapons systems to vehicle collision avoidance systems. Measuring the distance to the target is the essential feature of FMCW radar. Firstly, this thesis introduces the basic structure of the FMCW radar and the principle formeasuring distance. Secondly, by using software-dened radio (SDR),FMCW radar can be implemented and congured with a reduced costand complexity. In this report, the radar is implemented by means ofthe software GNU Radio Companion with a test signal. HackRF may be used in future work with an osmocom source instead of the testsignal.

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Carlsson, Andreas. "Vindjämförelse mellan VAD-algoritm och FMCW-radar". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-392767.

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I denna undersökning som mestadels koncentrerat sig på VAD-algoritmen och dess fördelar och nackdelar har till att börja med två för algoritmen särdeles viktiga parametrar undersökts. Totala antalet VAD-cirklar respektive andelen av dessa som i slutänden ger en vind som resultat har direkt studerats som en funktion av tiden och samtidigt indirekt mot de synoptiska väderförhållanden som rådde vid tidpunkten i fråga. Som en andra del av arbetet utfördes en mestadels relativ jämförelse där två till viss del olika radaralgoritmer jämfördes i samband med olika vädersituationer och olika tider på dygnet. Vad det gäller totala antalet cirklar visade sig en god korrelation mot det storskaliga vädret vilket främst kunde ses i samband med frontpassager medan ingen typ av regelbunden dygnsvariation kunde ses. Andelen cirklar som i slutänden gav godkänd vind som resultat visade istället en starkt regelbunden dygnskorrelation medan enbart en ytterst svag korrelation med vädret kunde ses. Den följande jämförelsen visade på två intressanta resultat i samband med natt- respektive dagmätningar samt mätningar utförda vid två högtryckssituationer. Den första jämförelsen visade på en markant större skillnad i mätresultat i samband med nattliga mätningar än vid mätningar i liknande vädersituationer utförda dagtid. Sammankopplat med resultatet som gavs i samband med andelen resultatgivande cirklar antyder detta att VAD-algoritmen i samband med nattliga mätningar ger ett relativt inkorrekt resultat. Ett andra intressant resultat gavs i det visade sig finnas en signifikant skillnad i resultaten vid de jämförelsen mellan resultaten från mätningarna utförda vid de två ovan angivna högtryckssituationerna.

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Ash, M. "FMCW phased array radar for imaging snow avalanches". Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1383579/.

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Radar has emerged as a useful tool for measuring avalanches to improve our knowledge of their behaviour. These measurements are used to refine and validate mathematical models of avalanches which are employed in the calculation of avalanche risk zones. However, current radar measurements do not provide a true representation of an entire avalanche flow due to their inadequate range resolution and lack of cross-range resolution. This thesis describes the development of an FMCW phased-array radar for use as a research tool to enable 2-D field measurements of avalanches in unparalleled detail. The design of the radar is presented in detail based on a review of the current avalanche remote sensors and applicable radar literature. The radar operates at 5.3GHz to illuminate dense centimetre-size blocks of snow. It is shown that the developed radar has a range resolution of 1.3m following processing, a 19x gain over other avalanche radar, and is sensitive to snow movements beyond 2.5km, sufficient to measure an entire avalanche flow. Additionally, methods of processing the radar data are developed. These include MTI processing using an IIR filter, avalanche front detection using OS-CFAR, and cohering of the array using low-quality phase synchronising sources within the field-of-view of the radar. The radar is now deployed in a bunker at well-equipped avalanche test site in Switzerland where it automatically records naturally occurring avalanches. This thesis describes two avalanches which were recorded by the radar during the 2010/11 winter. The collected data has been processed using the aforementioned processing techniques. The processing outputs are presented including single channel range-time images, velocity measurements of the avalanche fronts, and detailed 2-D images of the avalanches showing unprecedented detail. It is shown that there is the potential to extract velocity measurements of individual blocks of snow comprising the avalanche.

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Más fuentes

Libros sobre el tema "FMCW Radar"

Hoare, Edward G. Segmented chirp waveform simulation for h.f.groundwave FMCW bistatic radar. Birmingham: University of Birmingham, 1990.

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Renukaswamy, Pratap Tumkur, Nereo Markulic y Jan Craninckx. PLL Modulation and Mixed-Signal Calibration Techniques for FMCW Radar. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-59773-2.

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Abousetta, Marai M. Angular resolution improvement for long-wave FMCW radars. Birmingham: University ofBirmingham, 1990.

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Jankiraman, M. Fmcw Radar Design. Artech House Publishers, 2018.

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Geißler, Fabian. Erweiterung eines miniaturisierten FMCW-Radarmoduls. Technische Universität Dresden, 2021. http://dx.doi.org/10.25368/2022.401.

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This thesis presents the design of a miniature frequency modulated continuous wave (FMCW) radar with a frequency range of 50 MHz to 3 GHz using only commercial off the shelf (COTS) components. The system is intended for use as ground penetrating radar (GPR) as part of a lunar lander. State of the art topologies for ultra wideband signal synthesis are presented and compared. The theoretical background of split frequency ramps and the thus required stitching of baseband signals is discussed. The schematic design, layout and software development is described. The characterization of the radar system shows that the speciﬁcation is met within a temperature range of −40 °C to 75 °C and while exposition to radiation with an accumulated dose of up to 168 Gy. The use of COTS components does not impair the performance. Finally suggestions for hard- and software improvements are given, that resulted from working with the radar system.

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W-Band Fmcw Mimo Radar Demonstrator System for 3D Imaging. Fraunhofer IRB Verlag, 2018.

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Renukaswamy, Pratap Tumkur. PLL Modulation and Mixed-Signal Calibration Techniques for FMCW Radar. Springer, 2024.

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Adaptive Filtering for FMCW Interference Mitigation in PMCW Radar Systems: United States Patent 9989638. Independently Published, 2020.

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Capítulos de libros sobre el tema "FMCW Radar"

Singh, Additi Mrinal y Rabindranath Bera. "FMCW Waveform-Based Vehicular Radar". En Advances in Communication, Devices and Networking, 343–49. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7901-6_37.

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Chawraba, Assil, Ali Rizik, Andrea Randazzo y Daniele Caviglia. "Real-Time Sea Monitoring Using FMCW Radar". En Lecture Notes in Electrical Engineering, 468–73. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-48121-5_67.

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Shui, Yuzhu, Yong Wang, Zhaoyu Li y Mu Zhou. "A Novel Hand Gesture Recognition Method for FMCW Radar". En Advances in Artificial Intelligence and Security, 637–49. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78621-2_53.

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Nimac, Peter, Tadej Petrič, Andrej Krpič y Andrej Gams. "Evaluation of FMCW Radar for Potential Use in SSM". En Advances in Service and Industrial Robotics, 580–88. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04870-8_68.

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Li, Bo, Xiaotian Yu, Fan Li y Qiming Guo. "Deep Learning Based Target Activity Recognition Using FMCW Radar". En Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 484–90. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69066-3_42.

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Han, Xiangyu y Tao Liu. "Noncontact Heart Rate Variability Monitoring Based on FMCW Radar". En Intelligent Robotics and Applications, 219–29. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-6486-4_19.

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Ahmed, Faisal y Muhammad Furqan. "A 120-GHz FMCW Radar Demonstrator for Imaging Applications". En Imaging Sensors, Power Management, PLLs and Frequency Synthesizers, 71–98. Cham: Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-71559-4_5.

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Singh, Daljeet, Theresa Eleonye, Lukasz Surazynski, Hany Ferdinando, Atul Kumar, Hem Dutt Joshi, Mariella Särestöniemi y Teemu Myllylä. "Preliminary Studies on mm-Wave Radar for Vital Sign Monitoring of Driver in Vehicular Environment". En Communications in Computer and Information Science, 480–93. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-59091-7_32.

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AbstractThe last decade has witnessed significant improvements in vehicular technology, especially in providing a safer and more enjoyable environment for drivers and passengers. Fully autonomous vehicles are no longer a dream but are now a successful technology across the globe. Features such as autopilot, assisted parking, speed warning, and lane change assistance have improved the quality of user experience while using an automobile. Apart from this, e-health services have also become a prime aspect of the modern vehicular industry. Therefore, this research presents preliminary studies on mm-wave radar setup based on Frequency Modulated Continuous Wave (FMCW) technology in the 76 to 81 GHz band for vital sign monitoring of drivers and passengers in a vehicular environment. The effect of system parameters and the driver’s location with respect to radar is studied using human subjects to determine the optimum setup for vital sign monitoring. Measurement results showcase that mm-wave radars can be utilized for accurate and efficient measurement of the vital signs of drivers in vehicular environments.

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Renukaswamy, Pratap Tumkur, Nereo Markulic y Jan Craninckx. "FMCW Chirp Frequency Error and Phase Noise Measurement". En PLL Modulation and Mixed-Signal Calibration Techniques for FMCW Radar, 123–42. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-59773-2_4.

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Kuptsov, Vladimir D., Sergei I. Ivanov, Alexander A. Fedotov y Vladimir L. Badenko. "Features of Multi-target Detection Algorithm for Automotive FMCW Radar". En Lecture Notes in Computer Science, 355–64. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30859-9_30.

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Actas de conferencias sobre el tema "FMCW Radar"

Chilukuri, Raja Kumari, SrustithaGeedikanti, Nagalakshmi Talluri, Sai Deepak Vilasagaram, Hari Kishore Kakarla y K. Subbarao. "Analysis of Target Using FMCW Radar". En 2024 Second International Conference on Microwave, Antenna and Communication (MAC), 1–6. IEEE, 2024. https://doi.org/10.1109/mac61551.2024.10837528.

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Tullsson, B. E. "Topics in FMCW radar disturbance suppression". En Radar Systems (RADAR 97). IEE, 1997. http://dx.doi.org/10.1049/cp:19971620.

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Coskun, Salih, Ali Ozgur Yilmaz, Sencer Koc y Mert Celik. "Polarimetric FMCW weather radar". En 2015 23th Signal Processing and Communications Applications Conference (SIU). IEEE, 2015. http://dx.doi.org/10.1109/siu.2015.7130448.

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Aditi, K., A. Anil Kumar, Angshul Majumdar, R. Krishna Kanth, Tapas Chakravarty, Kriti Kumar y Arpan Pal. "Phaseless FMCW Multistatic Radar". En 2022 IEEE Sensors. IEEE, 2022. http://dx.doi.org/10.1109/sensors52175.2022.9967123.

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Chang, Wenge y Xiangyang Li. "Miniature high resolution FMCW SAR system". En 2016 CIE International Conference on Radar (RADAR). IEEE, 2016. http://dx.doi.org/10.1109/radar.2016.8059353.

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Avignon-Meseldzija, Emilie y Sylvain Azarian. "Dynamically reconfigurable frequency synthesizer for integrated FMCW radar". En 2014 International Radar Conference (Radar). IEEE, 2014. http://dx.doi.org/10.1109/radar.2014.7060440.

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Jia, Gaowei y Wenge Chang. "Modified back projection reconstruction for circular FMCW SAR". En 2014 International Radar Conference (Radar). IEEE, 2014. http://dx.doi.org/10.1109/radar.2014.7060465.

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Qu, Yu, Zuxun Song, Lin Shi y Hui Cao. "Moving target detection for FMCW radar". En 2011 IEEE CIE International Conference on Radar (Radar). IEEE, 2011. http://dx.doi.org/10.1109/cie-radar.2011.6159910.

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Lele, Qu, Liu Shujie, Guo Wenwen, Ma Shuang y Yang Tianhong. "Vital Sign Detection Using Multichannel FMCW Radar". En 2021 CIE International Conference on Radar (Radar). IEEE, 2021. http://dx.doi.org/10.1109/radar53847.2021.10028620.

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Uysal, Faruk y Simone Orru. "Phase-Coded FMCW Automotive Radar: Application and Challenges". En 2020 IEEE International Radar Conference (RADAR). IEEE, 2020. http://dx.doi.org/10.1109/radar42522.2020.9114798.

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