Gotowe bibliografie tematyczne / Doppler continuous wave antennae

Gotowa bibliografia na temat „Doppler continuous wave antennae”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 20 lutego 2023

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Artykuły w czasopismach na temat "Doppler continuous wave antennae"

Richter, Yair, Jacob Gerasimov, Nezah Balal i Yosef Pinhasi. "Tracking of Evasive Objects Using Bistatic Doppler Radar Operating in the Millimeter Wave Regime". Remote Sensing 14, nr 4 (11.02.2022): 867. http://dx.doi.org/10.3390/rs14040867.

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In this study, we propose a range detection (RD) ability by a continuous wave (CW) bistatic Doppler radar (RDCWB) of small and fast targets with very high range resolution. The target’s range and velocity are detected simultaneously. The scheme is based on the transmission of a continuous wave (CW) at millimeter wavelength (MMW) and the measurement of the respective Doppler shifts associated with target movements in different directions. The range resolution in this method is determined by the Doppler resolution only, without the necessity to transmit the modulated waveforms as in frequency modulation continuous wave (FMCW) or pulse radars. As the Doppler resolution in CW depends only on the time window required for processing, a very highrange resolution can be obtained. Most other systems that perform target localization use the transmission of wide-band waveforms while measuring the delay of the received signal scattered from the target. In the proposed scheme, the range resolution depends on the processed integration time of the detected signal and the velocity of the target. The transmission is performed from separated antennas and received by a single antenna. The received signal is heterodyned with a sample of the transmitted signal in order to obtain the Doppler shifts associated with the target’s movement. As in a multi-in multi-out (MIMO) configuration, the presented scheme allows for the accumulation of additional information for target classification. Data on the target’s velocity, distance, direction, and instantaneous velocity can be extracted. Using digital processing, with the additional information obtained by analyzing the difference between the resulting intermediate frequencies caused by the Doppler effect, it is possible to calculate the distance between the radar and the target at high resolution in real-time. The presented method, which was tested experimentally, proved to be highly effective, as only one receiver is required for the detection, while the transmission is carried out using a fixed, single-frequency transmission.

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Vierinen, Juha, Jorge L. Chau, Nico Pfeffer, Matthias Clahsen i Gunter Stober. "Coded continuous wave meteor radar". Atmospheric Measurement Techniques 9, nr 2 (3.03.2016): 829–39. http://dx.doi.org/10.5194/amt-9-829-2016.

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Abstract. The concept of a coded continuous wave specular meteor radar (SMR) is described. The radar uses a continuously transmitted pseudorandom phase-modulated waveform, which has several advantages compared to conventional pulsed SMRs. The coding avoids range and Doppler aliasing, which are in some cases problematic with pulsed radars. Continuous transmissions maximize pulse compression gain, allowing operation at lower peak power than a pulsed system. With continuous coding, the temporal and spectral resolution are not dependent on the transmit waveform and they can be fairly flexibly changed after performing a measurement. The low signal-to-noise ratio before pulse compression, combined with independent pseudorandom transmit waveforms, allows multiple geographically separated transmitters to be used in the same frequency band simultaneously without significantly interfering with each other. Because the same frequency band can be used by multiple transmitters, the same interferometric receiver antennas can be used to receive multiple transmitters at the same time. The principles of the signal processing are discussed, in addition to discussion of several practical ways to increase computation speed, and how to optimally detect meteor echoes. Measurements from a campaign performed with a coded continuous wave SMR are shown and compared with two standard pulsed SMR measurements. The type of meteor radar described in this paper would be suited for use in a large-scale multi-static network of meteor radar transmitters and receivers. Such a system would be useful for increasing the number of meteor detections to obtain improved meteor radar data products.

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Ishmael, Khaldoon, Yao Zheng i Olga Borić-Lubecke. "Phase Correlation Single Channel Continuous Wave Doppler Radar Recognition of Multiple Sources". Sensors 22, nr 3 (26.01.2022): 970. http://dx.doi.org/10.3390/s22030970.

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Continuous-wave Doppler radar (CWDR) can be used to remotely detect physiological parameters, such as respiration and heart signals. However, detecting and separating multiple targets remains a challenging task for CWDR. While complex transceiver architectures and advanced signal processing algorithms have been demonstrated as effective for multiple target separations in some scenarios, the separation of equidistant sources within a single antenna beam remains a challenge. This paper presents an alternative phase tuning approach that exploits the diversity among target distances and physiological parameters for multi-target detection. The design utilizes a voltage-controlled analog phase shifter to manipulate the phase correlation of the CWDR and thus create different signal mixtures from the multiple targets, then separates them in the frequency domain by suppressing individual signals sequentially. We implemented the phase correlation system based on a 2.4 GHz single-channel CWDR and evaluated it against multiple mechanical and human targets. The experimental results demonstrated successful separation of nearly equidistant targets within an antenna beam, equivalent to separating physiological signals of two people seated shoulder to shoulder.

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Azizi, Mussyazwann Azizi Mustafa, Mohammad Nazrin Mohd Noh, Idnin Pasya, Ahmad Ihsan Mohd Yassin i Megat Syahirul Amin Megat Ali. "Pedestrian detection using Doppler radar and LSTM neural network". IAES International Journal of Artificial Intelligence (IJ-AI) 9, nr 3 (1.09.2020): 394. http://dx.doi.org/10.11591/ijai.v9.i3.pp394-401.

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<span lang="EN-US">Integration of radar systems as primary sensor with deep learning algorithms in driver assist systems is still limited. Its implementation would greatly help in continuous monitoring of visual blind spots from incoming pedestrians. Hence, this study proposes a single-input single-output based Doppler radar and long short-term memory (LSTM) neural network for pedestrian detection. The radar is placed in monostatic configuration at an angle of 45 degree from line of sight. Continuous wave with frequency of 1.9 GHz are continuously transmitted from the antenna. The returning signal from the approaching subjects is characterized by the branching peaks higher than the transmitted frequency. A total of 1108 spectrum traces with Doppler shifts characteristics is acquired from eight volunteers. Another 1108 spectrum traces without Doppler shifts are used for control purposes. The traces are then fed to LSTM neural network for training, validation and testing. Generally, the proposed method was able to detect pedestrian with 88.9% accuracy for training and 87.3% accuracy for testing.</span>

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Park, Jae-Hyun, Yeo-Jin Jeong, Ga-Eun Lee, Jun-Taek Oh i Jong-Ryul Yang. "915-MHz Continuous-Wave Doppler Radar Sensor for Detection of Vital Signs". Electronics 8, nr 5 (20.05.2019): 561. http://dx.doi.org/10.3390/electronics8050561.

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A miniaturized continuous-wave Doppler radar sensor operating at 915 MHz to remotely detect both respiration and heart rate (beats per minute) is presented. The proposed radar sensor comprises a front-end module including an implemented complementary metal-oxide semiconductor low-noise amplifier (LNA) and fractal-slot patch antennas, whose area was reduced by 15.2%. The two-stage inverter-based LNA was designed with an interstage capacitor and a feedback resistor to acquire ultrawide bandwidth. Two operating frequencies, 915 MHz and 2.45 GHz, were analyzed with regard to path loss for efficient operation because frequency affects detection sensitivity, reflected signal power from the human body, and measurement distance in a far-field condition. Path-loss calculation based on the simplified layer model indicates that the reflected power of the 915 MHz radar could be higher than that of the 2.45 GHz radar. The implemented radar front-end module excluding the LNA occupies 35 × 55 mm2. Vital signs were obtained via a fast Fourier transform and digital filtering using raw signals. In an experiment with six subjects, the respiration and heart rate obtained at 0.8 m using the proposed radar sensor exhibited mean accuracies of 99.4% and 97.6% with respect to commercialized reference sensors, respectively.

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Kyritsis, Alexandros, Rodoula Makri i Nikolaos Uzunoglu. "Detection of Low RCS Unmanned Air Systems Using K-Band Continuous Wave Doppler Radar". Journal of Electrical and Computer Engineering 2023 (4.02.2023): 1–13. http://dx.doi.org/10.1155/2023/5683661.

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UASs (Unmanned Air Systems) are universally used in many activities, spanning from leisure-commercial to military applications. Accordingly, as the number of UASs operating in the sky increases, so does the need to detect and identify them, in order to ensure their legitimate use. This paper introduces a continuous wave (CW) Doppler radar implementation that can be used to provide early warning for flying-by small UASs. By applying Fast Fourier Transform (FFT) to the returned signal’s Doppler frequency, estimations can be made regarding the presence of aerial bodies inside an Area of Interest (AoI). Achieving reliable detection with a low false alarm rate (FAR) while keeping the size and power demands of the system to minimum was a challenge that was successfully met. The proposed system was extensively tested in outdoor environments; measurement results are presented and parameters such as radar power, antenna gain, and noise are discussed.

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Choi, Byunggil, Daegun Oh, Sunwoo Kim, Jong-Wha Chong i Ying-Chun Li. "Long-Range Drone Detection of 24 G FMCW Radar with E-plane Sectoral Horn Array". Sensors 18, nr 12 (28.11.2018): 4171. http://dx.doi.org/10.3390/s18124171.

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In this work, a 24-GHz frequency-modulated continuous-wave (FMCW) radar system with two sectoral horn antennas and one transmitting lens antenna for long-range drone detection is presented. The present work demonstrates the detection of a quadcopter-type drone using the implemented radar system up to a distance of 1 km. Moreover, a 3D subspace-based algorithm is proposed for the joint range-azimuth-Doppler estimation of long-range drone detection. The effectiveness of the long-range drone detection is verified with the implemented radar system through a variety of experiments in outdoor environments. This is the first such demonstration for long-range drone detection with a 24-GHz FMCW radar.

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Ferrick, M. G., N. E. Yankielun i D. F. Nelson. "A Doppler radar for continuous remote measurement of river ice velocity". Canadian Journal of Civil Engineering 23, nr 2 (1.04.1996): 408–17. http://dx.doi.org/10.1139/l96-045.

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River ice velocity measurements are fundamental to analyses of river ice dynamics. Ice velocity measurement with a continuous-wave Doppler radar system having real-time data acquisition and digital signal processing capability was evaluated during a river breakup and a frazil run on the Connecticut River. This system can be rapidly deployed, requires minimal operator interaction, will continuously acquire, process, store, and display ice velocity data, and does not depend on visibility conditions. In parallel, video records of ice motion were obtained at the same location for later manual processing and comparison with the radar results. We describe the Doppler radar system and obtain bounding estimates of possible measurement errors. The principal error in Doppler ice velocity measurement is due to the beam width of the radar antenna, and an analytical method is developed to minimize this error. Measured ice velocities ranged from 1 to 2.5 m/s during the river breakup, and from 0.5 to 0.65 m/s in the frazil run. Quantitative comparisons between the radar and video results show fundamental agreement between these measurement methods, and demonstrate that Doppler radar is an effective, efficient, and precise tool for obtaining river ice velocities over the full range of possible ice and velocity conditions. Key words: Doppler radar, river ice velocity, velocity measurement, error analysis, river breakup, frazil run.

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Gouveia, Carolina, José Vieira i Pedro Pinho. "A Review on Methods for Random Motion Detection and Compensation in Bio-Radar Systems". Sensors 19, nr 3 (31.01.2019): 604. http://dx.doi.org/10.3390/s19030604.

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The bio-radar system can measure vital signals accurately, by using the Doppler effect principle, which relates the received signal properties to the distance change between the radar antennas and the subject chest-wall. These systems have countless applications, from short range detection to assist in rescue missions, to long-term applications as for the continuous sleeping monitoring. Once the main applications of these systems intend to monitor subjects during long periods of time and under noisy environments, it is impossible to guarantee the patient immobilization, hence its random motion, as well as other clutter sources, will interfere in the acquired signals. Therefore, the signal processing algorithms developed for these applications have been facing several challenges regarding the random motion detection and mitigation. In this paper, an extended review on the already implemented methods is done, considering continuous wave radars. Several sources of random motion are considered, along with different approaches to compensate the distortions caused by them.

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Arab, Homa, Steven Dufour, Emilia Moldovan, Cevdet Akyel i Serioja Tatu. "A 77-GHz Six-Port Sensor for Accurate Near-Field Displacement and Doppler Measurements". Sensors 18, nr 8 (6.08.2018): 2565. http://dx.doi.org/10.3390/s18082565.

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A continuous-wave (CW) radar sensor design based on a millimetre-wave six-port interferometer is proposed. A complete sensor prototype is conceived of, fabricated and measured at 77 GHz for short-range professional and industrial applications. This sensor is designed to measure distances and Doppler frequencies with high accuracy, at a reasonable cost. Accurate phase measurements are also performed using the six-port technology, which makes it a promising candidate for CW radar sensing applications. Advances in the performance and functionality of six-port sensors are surveyed to highlight recent progress in this area. These include improvements in design, low power consumption, high signal to noise ratio, compactness, robustness and simplicity in realization. Given the fact that they are easy to fabricate, due to the lack of active circuits and being highly accurate, it is expected that six-port sensors will significantly contribute to the development of human tracking devices and industrial sensors in the near future. The entire circuit prototype, including the transmitter, the receiver antenna, the six-port interferometer and the four power detectors have been integrated on a die. The circuit is fabricated using a hybrid integrated technology on a 127-μm ceramic substrate with a relative permittivity of εr=9.8. Calibrated tuning forks are used to assess the performance of the six-port sensor experimentally for various frequencies.

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Rozprawy doktorskie na temat "Doppler continuous wave antennae"

Glynn, Patrick Joseph, i n/a. "Collision Avoidance Systems for Mine Haul Trucks and Unambiguous Dynamic Real Time Single Object Detection". Griffith University. Griffith Business School, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060809.163025.

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A suite of new collision avoidance systems (CAS) is presented for use in heavy vehicles whose structure and size necessarily impede driver visibility is introduced. The main goal of the project is to determine the appropriate use of each of the commercially available technologies and, where possible, produce a low cost variant suitable for use in proximity detection on large mining industry haul trucks. CAS variants produced were subjected to a field demonstration and, linked to the output from the earlier CAS 1 project, (a production high-definition in-cabin video monitor and r/f tagging system). The CAS 2 system used low cost Doppler continuous wave radar antennae coupled to the CAS 1 monitor to indicate the presence of an object moving at any speed above 3 Km/h relative to the antennae. The novelty of the CAS 3 system lies in the design of 3 interconnected, modules. The modules are 8 radar antennae (as used in CAS 2) modules located on the truck, software to interface with the end user (i.e. the drivers of the trucks) and a display unit. Modularisation enables the components to be independently tested, evaluated and replaced when in use. The radar antennae modules and the system as a whole are described together with the empirical tests conducted and results obtained. The tests, drawing on Monte-Carlo simulation techniques, demonstrate both the 'correctness' of the implementations and the effectiveness of the system. The results of the testing of the final prototype unit were highly successful both as a computer simulation level and in practical tests on light vehicles. A number of points, (as a consequence of the field test), are reviewed and their application to future projects discussed.

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Glynn, Patrick Joseph. "Collision Avoidance Systems for Mine Haul Trucks and Unambiguous Dynamic Real Time Single Object Detection". Thesis, Griffith University, 2005. http://hdl.handle.net/10072/365488.

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Yang, Wu. "Traffic Surveillance Using Low Cost Continuous Wave (CW) Doppler Radars". Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1347404224.

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Loata, Gabriel C. "Investigation of low-temperature-grown GaAs photoconductive antennae for continuous-wave and pulsed terahertz generation /". [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985715871.

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Soh, Wei Ting. "High doppler resolution imaging by multistatic continuous wave radars using constructive techniques". Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FSoh.pdf.

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Thesis (M.S. in Combat Systems Sciences and Technology)--Naval Postgraduate School, December 2007.
Thesis Advisor(s): Borden, Brett. "December 2007." Description based on title screen as viewed on January 22, 2008. Includes bibliographical references (p. 77-78). Also available in print.

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Voss, Martin. "Continuous wave & Dopplerultrasonographie zur Vorhersage der Präeklampsie und anderer Schwangerschaftskomplikationen : eine Screening-Untersuchung an einer urbanen Bevölkerungsgruppe eines Entwicklungslandes /". Hamburg : Akademos Wissenschaftsverlag, 2002. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=010049609&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Slamdien, Muammar. "Mitigating interference from switch-mode power supplies in sampling receivers". Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2513.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2017.
This thesis reports on the research and development of techniques applied to mitigate interference from switch-mode power supplies in sampling receivers and also more specifically for FMCW radar receiver applications. During the system testing phase of an FMCW Radar at Reutech Radar Systems (RRS), it was found that a large false target was emerging on the Range-Doppler Map (RDM). It was concluded that the problem was originating from interference caused by the switch-mode power supplies (SMPS), which supply DC power to the radar receiver subsystem. This then created the need for a new DC power supply, which is able to minimize the interference, as well as, mitigate the effects of the interference caused by the switching of the power supply. The mitigation techniques and power supply development was divided four main sections, namely, research, simulation, design and evaluation. The research involved obtaining background information on sampling receivers, sampling theory, Range-Doppler Processing, switch-mode power supplies, their effects and mitigation thereof. In the simulation phase, the research was utilised to simulate the various interference mitigation techniques. A power supply PCB was then designed in the design phase to practically illustrate the techniques being utilised. Lastly, during evaluation, this PCB was evaluated against the criteria set out in the research phase. The results demonstrated that the technique of synchronising the PWM clock to the Sampling frequency and SRF yielded a significant reduction in the SMPS noise on the Range-Doppler Map.

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Abbagoni, Baba Musa. "Experimental investigations of two-phase flow measurement using ultrasonic sensors". Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/11832.

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This thesis presents the investigations conducted in the use of ultrasonic technology to measure two-phase flow in both horizontal and vertical pipe flows which is important for the petroleum industry. However, there are still key challenges to measure parameters of the multiphase flow accurately. Four methods of ultrasonic technologies were explored. The Hilbert-Huang transform (HHT) was first applied to the ultrasound signals of air-water flow on horizontal flow for measurement of the parameters of the two- phase slug flow. The use of the HHT technique is sensitive enough to detect the hydrodynamics of the slug flow. The results of the experiments are compared with correlations in the literature and are in good agreement. Next, experimental data of air-water two-phase flow under slug, elongated bubble, stratified-wavy and stratified flow regimes were used to develop an objective flow regime classification of two-phase flow using the ultrasonic Doppler sensor and artificial neural network (ANN). The classifications using the power spectral density (PSD) and discrete wavelet transform (DWT) features have accuracies of 87% and 95.6% respectively. This is considerably more promising as it uses non-invasive and non-radioactive sensors. Moreover, ultrasonic pulse wave transducers with centre frequencies of 1MHz and 7.5MHz were used to measure two-phase flow both in horizontal and vertical flow pipes. The liquid level measurement was compared with the conductivity probes technique and agreed qualitatively. However, in the vertical with a gas volume fraction (GVF) higher than 20%, the ultrasound signals were attenuated. Furthermore, gas-liquid and oil-water two-phase flow rates in a vertical upward flow were measured using a combination of an ultrasound Doppler sensor and gamma densitometer. The results showed that the flow gas and liquid flow rates measured are within ±10% for low void fraction tests, water-cut measurements are within ±10%, densities within ±5%, and void fractions within ±10%. These findings are good results for a relatively fast flowing multiphase flow.

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Wetherill, Lindsay D. "Reproducibility of a continuous-wave Doppler ultrasound system for assessment of ascending aortic blood flow responses during graded exercise testing with healthy individuals". Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80102.

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Continuous-wave (CW) Doppler recordings of ascending aortic maximal blood flow acceleration (PkA), maximal velocity (PkV) and systolic velocity integral (SVI) were taken at each stage of a graded exercise treadmill test on two separate days with 30 physically active adult males. Signals were measured (Quinton Exerdop) for all cardiac cycles in the 3rd minute of each stage using a hand-held probe positioned at the suprasternal notch. A dedicated microcomputer, programmed to select "valid" beats on the basis of value consistency in the sample set, determined the acceptability of signals. No significant differences were found between the three trial means within each stage on either day for PkA, PkV or SVI. Significant (p <.01) intraclass reliability estimates ranged from r = 0.89 to 0.97 (Pk.A), r = 0.90 to 0.98 (PkV) and r = 0.85 to 0.95 (SVI) . Coefficients of variation were calculated at each stage to estimate the relative consistency of each measure. A gradual reduction of the coefficient of variation was observed for each blood flow measure between stages one and four. The test-retest (between days) reliability coefficients for PkA, PkV and SVI for stages one to four ranged between r = 0.51 to 0.78 (P <.004), but correlations for the pre-exercise baseline and stages five and six were lower. These results indicate that (1) PkA, PkV and SVI demonstrate greater measurement stability within each stage of a graded exercise test than is the case between separate days of measurement at the same stage; and (2) there is modest day-to-day response stability for clinical testing with the Doppler parameter of PkV. Reliability/stability was best in exercise stages which encompass the speed and grade range of 45.0 m•min⁻¹/10%. - 111.7 m•min⁻¹/14%, i.e., those in which all subjects can walk.
Master of Science

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Braña, Isaac. "Turbine-Mounted Lidar:The pulsed lidar as a reliable alternative". Thesis, Högskolan på Gotland, Institutionen för kultur, energi och miljö, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-217020.

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Expectations for turbine-mounted lidar are increasing. The installation of lidars in wind turbine nacelles for measuring incoming winds, preventing wind gusts and increasing energy productions is after recently studies, technically and economically feasible. Among available lidar types, the most studied were continuous wave lidars because they were the most reliable apparatus when this initiative began. However, after studying technical considerations and checking commercial lidars, it was found that pulsed lidarslead this technology due to their promising results. The purpose of this report is to fill the gap between the interest in this technology and the absence of any academic papers that analyzes continuous-wave and pulsed lidars forthe mounted lidar concept. Hence, this report discusses the importance of turbine mounted lidars for wind power industry, different possible configurations and explains why specifically pulsed lidars are becoming more important for the mounted lidarmarket.

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Książki na temat "Doppler continuous wave antennae"

1946-, Williams George, red. Doppler echocardiography: The quantitative approach : quantitative methods of pulsed & continuous wave cardiac Doppler. Ramsey, N.J: Johnson & Johnson Ultrasound, 1985.

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Jeffry, Rothermel, i United States. National Aeronautics and Space Administration., red. Signal processing and calibration of continuous-wave focused CO₂ Doppler lidars for atmospheric backscatter measurement. [Washington, DC: National Aeronautics and Space Administration, 1996.

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Kasprzak, Jaroslaw D., Anita Sadeghpour i Ruxandra Jurcut. Doppler echocardiography. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198726012.003.0003.

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Doppler examination is an integral part of the echocardiogram. Current systems are equipped with spectral Doppler in continuous wave mode (offering measurements of high velocities with limited spatial specificity due to integration of signal along the scan line), pulsed wave mode (high spatial specificity with maximal recordable velocity reduced by the Nyquist limit), and colour Doppler flow mapping (allowing rapid identification of flow pattern within a cross-sectional B-mode sector). Tissue Doppler echocardiography emerged as a basic tool for sampling regional myocardial velocities, in pulsed wave or colour velocity mapping mode. Finally, three-dimensional systems improve spatial presentation of flow phenomena by integrating Doppler-derived flow patterns in three-dimensional datasets.

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D, Campbell S., i Langley Research Center, red. Wake vortex field measurement program at Memphis, Tennessee: Data guide. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1997.

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D, Emmitt G., i United States. National Aeronautics and Space Administration., red. The SPAce Readiness Coherent Lidar Experiment (SPARCLE) space shuttle mission. [Washington, DC: National Aeronautics and Space Administration, 1998.

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Reproducibility of a continuous-wave Doppler ultrasound system for assessment of ascending aortic blood flow responses: During graged [i.e. graded] exercise testing with healthy individuals. 1987.

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Reproducibility of a continuous-wave Doppler ultrasound system for assessment of ascending aortic blood flow responses during graged [i.e. graded] exercise testing with healthy individuals. 1988.

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Lancellotti, Patrizio, i Bernard Cosyns. Examination. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198713623.003.0001.

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Echocardiography is a diagnostic imaging technique by which ultrasound is used to display anatomic and physiologic characteristics of the cardiovascular system. Echocardiography consists of several different imaging modalities that require appropriate settings. In this chapter the most important system settings are discussed in the context of the basic physics of ultrasound image formation. Setting-up the echo machine to optimize patient examination is discussed in detail. All controls are covered. Continuous-wave, pulsed-wave, and colour flow Doppler are explained, as well as more advanced techniques including myocardial velocity imaging and speckle tracking and 3D imaging. Understanding these basic principles will allow optimizing image quality for each individual patient.

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Części książek na temat "Doppler continuous wave antennae"

Somekh, M. G., D. Zhang i R. K. Appel. "Continuous Wave Operation of Acoustic Microscope Using Doppler Doppler Modulation". W Acoustical Imaging, 203–12. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0791-4_21.

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Ludomirsky, Achi, Daniel J. Murphy, Stephen E. Bash i James C. Huhta. "Continuous Wave Doppler Estimation of Ventricular Septal Defect Gradient". W Pediatric Cardiology, 144–46. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4613-8598-1_38.

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Wen, Julia W., R. Brad Stamm, Donald L. Kaiser i Rovert S. Gibson. "Quantitative evaluation of aortic and mitral stenosis by continuous wave Doppler echocardiography". W Cardiac Doppler Diagnosis, Volume II, 141–50. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4241-7_11.

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von Reutern, G. M. "Free hand Doppler techniques for examination of the extracranial arteries with continuous wave Doppler". W Developments in Cardiovascular Medicine, 157–77. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-4305-6_11.

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Houston, A. B., I. A. Simpson i C. D. Sheldon. "Assessment of the clinical value of continuous wave Doppler ultrasound in children with acyanotic congenital heart disease". W Color Doppler Flow Imaging, 207–18. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4283-7_14.

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Grab, D., W. Hütter, T. Keim i R. Terinde. "Erfahrungen mit dem Continuous-wave-Doppler bei der Überwachung von Mehrlingsschwangerschaften". W Gynäkologie und Geburtshilfe 1988, 99–100. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74784-7_46.

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Arbeille, Ph, F. Lapierre, F. Patat, M. Berson, D. Besse i L. Pourcelot. "Quantification of carotid stenosis using continuous wave Doppler and spectral analysis". W Developments in Cardiovascular Medicine, 179–92. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-4305-6_12.

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Kulshreshtha, Tanmai, Sudhir Kumar Singh, Ruchi Chaurasia, Manish Kumar i Naimur Rahman Kidwai. "Low-Power Front End for Continuous-Wave Doppler Harmonic Ultrasonography System". W Proceedings of Trends in Electronics and Health Informatics, 449–57. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8826-3_38.

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Hoffmann, Andreas, Peter Stulz, Erich Gradel i Dieter Burckhardt. "Noninvasive Assessment of Prosthetic Heart Valve Function by Continuous-Wave Doppler Ultrasound". W Cardiac Valve Replacement, 269–79. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2601-4_31.

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Pavan, Theo Zeferino, A. L. Baggio i A. A. O. Carneiro. "Continuous wave Doppler ultrasound measurement of micro-vibrations induced by a focused acoustic radiation force". W IFMBE Proceedings, 852–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89208-3_204.

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Streszczenia konferencji na temat "Doppler continuous wave antennae"

Ishmael, Khaldoon, Avon Whitworth, Ehsan Yavari i Olga Boric-Lubecke. "Single Antenna Continuous Wave Doppler Radar Detection for Multiple Moving Targets". W 2019 IEEE Radio and Wireless Symposium (RWS). IEEE, 2019. http://dx.doi.org/10.1109/rws.2019.8714332.

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Gou, Xiaoyu, Hong Su, Tie Li i Liang Li. "The circuit-level simulation of continuous Wave Doppler Fuze detector based on ADS". W 2012 10th International Symposium on Antennas, Propagation & EM Theory (ISAPE - 2012). IEEE, 2012. http://dx.doi.org/10.1109/isape.2012.6408971.

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Pfanner, Florian, Thomas Allmendinger, Thomas Flohr i Marc Kachelriess. "Monitoring respiratory motion using continuous wave Doppler radar in a near field multi antenna approach". W 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (2012 NSS/MIC). IEEE, 2012. http://dx.doi.org/10.1109/nssmic.2012.6551819.

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Akinin, Abraham, Joshua Yang, Alexander Williams, Andrew Lee, Pedram Pourhoseini, Arnost Fronek i Gert Cauwenberghs. "Continuous wave ultrasonic doppler tonometry". W 2014 IEEE Biomedical Circuits and Systems Conference (BioCAS). IEEE, 2014. http://dx.doi.org/10.1109/biocas.2014.6981729.

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Yu, Meng, Min Xun, Ruibin Wang i LianG Li. "Analysis on Doppler Sensitivity of Quasi-Continuous Wave". W 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT). IEEE, 2018. http://dx.doi.org/10.1109/icmmt.2018.8563626.

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Lee, Kwang Jin, Chanki Park i Boreom Lee. "Tracking driver's heart rate by continuous-wave Doppler radar". W 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2016. http://dx.doi.org/10.1109/embc.2016.7591952.

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Vargas, Alexander, Robin Alvarez, Pablo Lupera i Felipe Grijalva. "SDR-based Speed Measurement with Continuous-Wave Doppler Radar". W 2021 IEEE International Mediterranean Conference on Communications and Networking (MeditCom). IEEE, 2021. http://dx.doi.org/10.1109/meditcom49071.2021.9647625.

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Anderson, Michael G., i Robert L. Rogers. "Micro-Doppler analysis of multiple frequency continuous wave radar signatures". W Defense and Security Symposium, redaktorzy James L. Kurtz i Robert J. Tan. SPIE, 2007. http://dx.doi.org/10.1117/12.719800.

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Struijk, Johannes, Dagbjört Helga Eiriksdóttir, Ásgerdur Arna Pálsdóttir i Samuel Emil Schmidt. "Heart Sounds Obtained With Non-Contact Continuous-Wave Echo Doppler". W 2018 Computing in Cardiology Conference. Computing in Cardiology, 2018. http://dx.doi.org/10.22489/cinc.2018.342.

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Wang, Guochao, Changzhan Gu, Jennifer Rice, Takao Inoue i Changzhi Li. "Highly accurate noncontact water level monitoring using continuous-wave Doppler radar". W 2013 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet). IEEE, 2013. http://dx.doi.org/10.1109/wisnet.2013.6488620.

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