Download or read book Design and Development of Stepped Frequency Continuous Wave and FIFO Noise Radar Sensors for Tracking Moving Ground Vehicles written by Teoman Emre Ustun and published by . This book was released on 2001 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The design and development of two different, small, low-cost, low-power radar sensors are presented in this thesis. A stepped frequency continuous wave (SFCW) radar and a first-in-first-out (FIFO) noise radar are designed and implemented to detect and track moving ground vehicles through weedy foliage. This is done with both the target and radar close to the ground. In addition, the operating principles of both radar systems are presented from a mathematical point of view. The target tracking is performed both in range and azimuth. A monopulse technique is used to track targets in azimuth. Each of these radar sensors is implemented using state-of-the-art, surface mount, and commercial-off-the-shelf (COTS) components. The operating band of the SFCW radar is chosen as 3.0 - 3.6 GHz. The design procedure of a new concept radar, called FIFO noise radar is presented in detail. The FIFO noise radar is operated at a center frequency of 3.3 GHz with a bandwidth of 100 MHz. The performance characteristics of both radar sensors are presented. It is shown that the SFCW radar is a feasible radar sensor for tracking moving ground targets in both range and azimuth, because of its high amplitude sensitivity and stability. The range tracking capabilities of the FIFO noise radar sensor are also presented.
Download or read book Stepped Frequency Radar Sensors written by Cam Nguyen and published by Springer. This book was released on 2016-03-29 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the theory, analysis and design of microwave stepped-frequency radar sensors. Stepped-frequency radar sensors are attractive for various sensing applications that require fine resolution. The book consists of five chapters. The first chapter describes the fundamentals of radar sensors including applications followed by a review of ultra-wideband pulsed, frequency-modulated continuous-wave (FMCW), and stepped-frequency radar sensors. The second chapter discusses a general analysis of radar sensors including wave propagation in media and scattering on targets, as well as the radar equation. The third chapter addresses the analysis of stepped-frequency radar sensors including their principles and design parameters. Chapter 4 presents the development of two stepped-frequency radar sensors at microwave and millimeter-wave frequencies based on microwave integrated circuits (MICs), microwave monolithic integrated circuits (MMICs) and printed-circuit antennas, and discusses their signal processing. Chapter 5 provides the electrical characterization and test results of the developed microwave and millimeter-wave stepped-frequency radar sensors. Finally, a summary and conclusion is provided.
Download or read book Digest written by IEEE Antennas and Propagation Society. International Symposium and published by . This book was released on 2002 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design of Hardware and Signal Processing for a Stepped Frequency Continuous Wave Ground Penetrating Radar written by Alan Langman and published by . This book was released on 2002 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Implementation of a Stepped Frequency Continuous Wave Radar System for Biomedical Applications written by Sabikun Nahar and published by . This book was released on 2018 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a need to detect vital signs of human (e.g., the respiration and heart-beat rate) with noncontact method in a number of applications such as search and rescue operation (e.g. earthquakes, fire), health monitoring of the elderly, performance monitoring of athletes Ultra-wideband radar system can be utilized for noncontact vital signs monitoring and tracking of various human activities of more than one subject. Therefore, a stepped-frequency continuous wave radar (SFCW) system with wideband performance is designed and implemented for Vital signs detection and fall events monitoring. The design of the SFCW radar system is firstly developed using off-the-shelf discrete components. Later, the system is implemented using surface mount components to make it portable with low cost. The measurement result is proved to be accurate for both heart rate and respiration rate detection within ±5% when compared with contact measurements. Furthermore, an electromagnetic model has been developed using a multi-layer dielectric model of the human subject to validate the experimental results. The agreement between measured and simulated results is good for distances up to 2 m and at various subjects' orientations with respect to the radar, even in the presence of more than one subject. The compressive sensing (CS) technique is utilized to reduce the size of the acquired data to levels significantly below the Nyquist threshold. In our demonstration, we use phase information contained in the obtained complex high-resolution range profile (HRRP) to derive the motion characteristics of the human. The obtained data has been successfully utilized for non-contact walk, fall and limping detection and healthcare monitoring. The effectiveness of the proposed method is validated using measured results.
Download or read book Automotive Radar Sensors in Silicon Technologies written by Vipul Jain and published by Springer Science & Business Media. This book was released on 2012-09-26 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the leading causes of automobile accidents is the slow reaction of the driver while responding to a hazardous situation. State-of-the-art wireless electronics can automate several driving functions, leading to significant reduction in human error and improvement in vehicle safety. With continuous transistor scaling, silicon fabrication technology now has the potential to substantially reduce the cost of automotive radar sensors. This book bridges an existing gap between information available on dependable system/architecture design and circuit design. It provides the background of the field and detailed description of recent research and development of silicon-based radar sensors. System-level requirements and circuit topologies for radar transceivers are described in detail. Holistic approaches towards designing radar sensors are validated with several examples of highly-integrated radar ICs in silicon technologies. Circuit techniques to design millimeter-wave circuits in silicon technologies are discussed in depth.
Download or read book Postprocessing Architecture for an Automotive Radar Network written by Mark Schiementz and published by Cuvillier Verlag. This book was released on 2005 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Stepped Frequency Continuous Wave Short Range Radar for Agriculture Measurements with Coherent Cancellation Calibration written by Garrett Sidney Peterson and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Leakage/crosstalk in short-range compact radar systems is an issue that is gaining importance as these systems proliferate our society. Leakage and crosstalk in these radars result from three primary sources: antenna, board level, and component level coupling. This leakage/crosstalk often manifests as false targets at the output. Several strategies have been proposed to reduce the effects of these coupling paths. They involve RF cancellation at the frontend of the system, digital cancellation in the backend, or clever antenna placement. All these solutions have limited effectiveness but can be acceptable in given use cases. This thesis looks at the sources of the leakage/crosstalk and the magnitude each source contributes. It discusses previous research into line isolation to show what can lead to good design decisions and proposes a new method of mitigation that involves injection of a correction signal using the coherent cancellation calibration technique. This technique focuses on short-range stepped frequency continuous wave radar systems. The technique was evaluated through the development and testing of a compact short-range system for agricultural purposes. The K-State agricultural radar shown went through several revisions and resulted in a compact light-weight sensing radar that shows promise as a sensor for precision agriculture uses. This thesis documents design decisions made in development to produce a radar that can effectively cancel large amounts of self-interference resulting from antenna coupling and mixer leakage. The field experiments show results for measuring crop height and have potential to provide additional data such as yield and biomass estimates.
Download or read book Design of UWB Radar Sensors written by Amnoiy Ruengwaree and published by kassel university press GmbH. This book was released on 2007 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Software Defined Radio Based Frequency Modulated Continuous Wave Ground Penetrating Radar written by Patrick Fiske and published by . This book was released on 2020 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frequency modulated continuous wave (FMCW) radar allows for a wide range of research applications. One primary use of this technology and what is explored in this thesis, is imaging in the form of ground penetrating radar. To generate proper results, spectral wide-band reconstruction has been developed to overcome hardware limitations allowing for high resolution radar. Requiring complex reconstruction algorithms, the proposed method benefits greatly in terms of performance and implementation compared to other radar systems. This thesis develops a wideband linearly frequency modulated radar leveraging a software-defined radio (SDR). The modular system is capable of a tunable wideband bandwidth up to the maximum SDR ratings. This high-resolution system is further improved through implementation of grating side-lobe suppression filters that correct for the spectral discontinuities imposed by the reconstruction. These grating lobes are managed through multiple techniques to alleviate any ghost imaging or false positives associated with object detection. The solution provided allows for generally non-coherent devices to operate with synchronous phase giving accurate sample-level measurements. Various corrections are in place as mitigation of hardware transfer functions and system level noise. First the system was theorized and simulated, illuminating the performance of the radar. Following development of the radar, measurements were conducted to confirm proper and accurate object detection. Further experiments were performed ensuring Ground Penetrating Radar (GPR) performance as designed. Applications of this work include Synthetic Aperture Radar (SAR) imaging, innovative GPR, and unmanned aerial vehicle (UAV) systems.
Download or read book OFDM Coupled Compressive Sensing Algorithm for Stepped Frequency Ground Penetrating Radar written by Mohamed Metwally and published by . This book was released on 2014 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dating back to as far as 1940, the US road and bridge infrastructure system has garnered quite the status for strategically connecting together half a continent. As monumental as the infrastructure's status, is its rate of deterioration, with the average bridge age coming at a disconcerting 50 years. Aside from visual inspection, a battery of non-destructive tests were developed to conduct structural fault assessment and detect laminations, in order to preemptively take preventive measures. The mainstream commercially favored test is the impulse time domain ground penetrating radar (GPR). An extremely short, high voltage pulse is used to visualize cross-sections of the bridge decks. While effective and it does not disturb traffic flow, impulse radar suffers from major drawbacks. The drawbacks are namely, its limited dynamic range and high cost of system manufacturing. A less prominent yet highly effective system, stepped frequency continuous wave (SFCW) GPR, was developed to address the aforementioned drawbacks. Mostly developed for research centers and academia, SFCW boasts a high dynamic range and low cost of system manufacturing, while producing comparable if not identical results to the impulse counterpart. However, data procurement speed is an inherent problem in SFCW GPR, which seems to keep impulse radar in the lead for production and development. I am proposing a novel approach to elevate SFCW's data acquisition speed and its scanning efficiency altogether. This approach combines an encoding method called orthogonal frequency division multiplexing (OFDM) and an emerging paradigm called compressive sensing (CS). In OFDM, a digital data stream, the transmit signal, is encoded on multiple carrier frequencies. These frequencies are combined in such a way to achieve orthogonality between the carrier frequencies, while mitigating any interference between said frequencies. In CS, a signal can be potentially reconstructed from a few samples below the standardized Nyquist rate. A novel design of the SFCW GPR architecture coupled with the OFDM-CS algorithm is proposed and evaluated using ideal channels and realistically modelled bridge decks.
Download or read book A Unique Approach to Frequency Modulated Continuous Wave Radar Design written by Gregory Louis Charvat and published by Gregory Charvat. This book was released on 2003 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stepped Frequency Continuous Wave Radar data Preprocessing written by I. Nicolaescu and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Position Sensor Using Phase based Continuous Wave Radar written by Ittichote Chuckpaiwong and published by . This book was released on 2003 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiple Frequency Continuous Wave Radar Design for Micro doppler Extraction written by Michael Glen Anderson and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Surface Detection Using Dual frequency Continuous wave Radar written by B. Shin and published by . This book was released on 1991 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Fixed Range Noise Radar for Moving Vehicle Identification written by Eric Keller Walton and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ohio State University ElectroScience Laboratory has built a radar that transmits ultra wideband (UWB) random noise. The received signal is cross correlated with a fixed delay version of the transmitted signal. This produces a radar detection ring at a fixed distance from the radar. As a vehicle or person moves through the detection ring, the range profile and the time dynamics of the moving person/vehicle are traced out. This permits identification, as well as detection of the moving object. We will present a description of the system and show example data. Example signatures will be shown and discussed. The potential for an unattended ground sensor in the foliage penetration and target classification mode will he discussed.
