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Showing 1 to 20 of 47 for “"pulse compression"”.

  1. Data transmission by pulse compression

    El-Alem, Muhammed S.Y.Aston University1978

    Pulse compression techniques originated in radar.The present work is concerned with the utilization of these techniques in general, and the linear FM (LFM) technique in particular, for comnunications. It introduces these techniques from an optimum communications viewpoint and outlines their …

    aston Repository record

  2. The Application of Pulse Compression Techniques to Ionospheric Sounding

    Wippermann, Donald RichardUniversity of Illinois at Urbana-Champaign1967

    Made available in DSpace on 2014-12-08T22:24:19Z (GMT). No. of bitstreams: 1 6801886.pdf: 6427179 bytes, checksum: 0c4223599ae3ba300977fd8f5feace55 (MD5) Previous issue date: 1967

    uiuc Repository record

  3. Femtosecond Pulse Compression via Self-Phase Modulation in 1-Decanol

    Stephen, Jacob AUniversity of Windsor2022

    … outside the realm of physics. Ultrashort laser pulses on the order of femtoseconds (1 fs = 1 × 10−15 s) are widely used for ultrafast science. Many lasers can produce pulses on the order of 100 fs, with state of the art, high end lasers being capable of producing pulses around 30 fs. However, …

    windsor Repository record

  4. Pulse compression applied to the detection of F.S.K. and P.S.K. signals

    Jibrail, Wasim W.S.Aston University1980

    … are investigated. The new approach utilizes pulse compression techniques, well known in radar systems, to facilitate the implementation of the matched filter in the form of the Pulse Compressor Matched Filter (P.C.M.F.). Both detection schemes feature a mixer- P.C.M.F. Compound as their …

    aston Repository record

  5. The Monte Carlo techniques with pulse compression for rough surface scattering

    Yan, Jun KentMassachusetts Institute of Technology1996

    Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1996.

    mit Repository record

  6. Investigation of pulse compression technique and time-frequency analysis in medical ultrasound imaging

    Venkataraman, Shyam

    rit Repository record

  7. Small lesion detection with resolution enhancement compression: a method of coded excitation/pulse compression

    Linden, Paul M.University of Illinois at Urbana-Champaign2010

    … coded excitation method, resolution enhancement compression (REC), increases the axial resolution and the echo signal-to-noise ratio (eSNR) for an ultrasonic imaging system. The REC technique was examined for its ability to improve lesion detectability. In addition to lesion detectability, the …

    uiuc Repository record

  8. New Techniques for Time-Reversal-Based Ultra-wideband Microwave Pulse Compression in Reverberant Cavities

    Drikas, Zachary BenjaminVirginia Tech2020

    … of high-peak power, microwave ultra-short pulses (USPs) is desirable for ultra-wideband communications and remote sensing. A variety of microwave USP generators exist today, or are described in the literature, and have benefits and limitations depending on application. A new class of pulse …

    vt Repository record

  9. Optimization of coded signals based on wavelet neural network

    Ahmed, Mustafa SamiUniversiti Tun Hussein Onn Malaysia2015

    Pulse compression technique is used in many modern radar signal processing systems to achieve the range accuracy and resolution of a narrow pulse while retaining the detection capability of a long pulse. It is important for improving range resolution for target. Matched filtering of binary phase …

    uthm Repository record

  10. Software Infrastructure for NeXtRAD Development in Julia Programming Language

    Jonkers, Stephanie CavaleDepartment of Electrical Engineering2016

    … to navigate through compressed HDF5 files, apply pulse compression, pulse-Doppler processing and an adaptive LMS filter for interference suppression is presented. Both serial and multi-core pulse compression and pulse-Doppler processing functions are implemented. The assessment of the algorithm …

    cape-town Repository record

  11. Electronic scan weather radar: scan strategy and signal processing for volume targets

    Nguyen, Cuong Manh, author, Chandra, Chandrasekar V., advisor, Jayasumana, Anura P., committee member, Mielke, Paul W., committee member, Notaros, Branislav, committee memberColorado State University. Libraries2013

    … state transmitters to keep costs down requires pulse compression technique. Wide-band pulse compression filters will partly reduce the system sensitivity performance. A system for sensitivity enhancement (SES) for pulse compression weather radar is developed to mitigate this issue. SES uses a …

    colostate Repository record

  12. Improving the Capabilities of Swath Bathymetry Sidescan Using Transmit Beamforming and Pulse Coding

    Butowski, Marek2014

    … for SBS systems. The first, binary coded pulse transmission and pulse compression is shown to increase the SNR and in turn provide reduced angle variance in SBS systems. The second, transmit beamforming, and more specifically steering and shading, is shown to increase both acoustic power …

    uvic Repository record

  13. Anti-jamming MTI radar using variable pulse-codes

    Lin, Kenny, 1978-Massachusetts Institute of Technology2002

    A pulsed Doppler radar is vulnerable to advanced repeat-back jamming techniques. Rapidly advancing technology producing inexpensive, high performance commercial off-the-shelf (COTS) components enable the construction of an electronic countermeasure (ECM) system capable of exploiting this …

    mit Repository record

  14. INVESTIGATION OF THE NONLINEAR INDEX OF REFRACTION OF WATER AT 815 AND 407 NANOMETERS

    Wilkes, Zachary2007

    … in water at both 815 nm and 407 nm with pump pulse lengths of ~90 femtoseconds and ~250 femtoseconds respectively. The 815 nm measurement serves as a benchmark against previous published values while the 407 nm measurement is entirely new. Knowing the value of the nonlinear index at 407 nm …

    maryland Repository record

  15. Software packages performance evaluation of basic radar signal processing techniques

    Frantz, XavierDepartment of Electrical Engineering2019

    … processing techniques were considered, such as pulse compression, Doppler processing and adaptive filtering for interference suppression. The scripting languages investigated were the proprietary MATLAB, as well as open source alternatives such as Octave, Scilab, Python and Julia. While the …

    cape-town Repository record

  16. Sub-nanosecond UV filaments and their applications for remote spectroscopy and high-voltage discharges

    Feng, Chengyong

    … NIR filament limit these applications. Long-pulse UV filaments have therefore been proposed at UNM to overcome such limitations. This dissertation describes our investigation and optimization of the high-power UV source, focusing on details of the generation and characterization of the …

    unm Repository record

  17. Development and spatio-spectral mapping of a capillary high harmonic source

    Praeger, MatthewUniversity of Southampton2008

    … produced at an array of apertures. A study of pulse compression using cascaded quadratic nonlinearity for spectral broadening.

    soton Repository record

  18. Towards High-Flux Isolated Attosecond Pulses with a 200 TW CPA

    Cunningham, Eric

    <p>Attosecond pulses have been developed as a means for investigating phenomena that proceed on the order of the atomic unit of time (24 as). Unfortunately, these extreme ultraviolet (XUV) pulses by themselves contain too few photons to initiate nonlinear dynamics or dress states in an attosecond …

    ucf

  19. Acoustic scattering by axisymmertic finite-length bodies with application to fish : measurement and modeling

    Reeder, D. Benjamin (Davis Benjamin), 1966-Massachusetts Institute of Technology2002

    … dependencies to morphology and orientation. Pulse compression processing temporally resolves multiple returns from each individual which show good correlation with size and orientation, and demonstrate that there exists more than one significant scattering feature in the animal.

    mit Repository record

  20. Development of mobile robot in virtual reality environment for educational purpose

    Saleh Al-Gahdari, Abdulaziz ShaifUniversiti Tun Hussein Onn Malaysia2015

    Pulse compression The intelligent system can help a robot to navigate through the environment by itself. The need for such system has become of essence especially when quality and accuracy is demanded in delivering complete processes of work in specific time. This project has focused on building a …

    uthm Repository record

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