The Experts below are selected from a list of 5790 Experts worldwide ranked by ideXlab platform

Paul Racette - One of the best experts on this subject based on the ideXlab platform.

  • NASA's L-Band Digital Beamforming Synthetic Aperture Radar
    IEEE Transactions on Geoscience and Remote Sensing, 2011
    Co-Authors: Rafael F. Rincon, Manuel A. Vega, Manuel Buenfil, Alessandro Geist, Lawrence Hilliard, Paul Racette
    Abstract:

    The Digital Beamforming Synthetic Aperture Radar (DBSAR) is a state-of-the-art L-band radar that employs advanced radar technology and a customized data acquisition and real-time processor in order to enable multimode measurement techniques in a single radar platform. DBSAR serves as a test bed for the development, implementation, and testing of Digital Beamforming radar techniques applicable to Earth science and planetary measurements. DBSAR flew its first field campaign on board the National Aeronautics and Space Administration P3 aircraft in October 2008, demonstrating enabling techniques for scatterometry, synthetic aperture, and altimetry.

Yuanxun Ethan Wang - One of the best experts on this subject based on the ideXlab platform.

  • Beamspace SMILE array for Digital Beamforming with a single RF receiver
    2017 IEEE International Symposium on Antennas and Propagation & USNC URSI National Radio Science Meeting, 2017
    Co-Authors: Yikun Huang, Lindsay Light, Yuanxun Ethan Wang
    Abstract:

    A novel approach of beamspace SMILE array with a single RF receiver for Digital Beamforming is proposed in this paper. We use a set of orthogonal beams to transfer element space data to beamspace and then use a SMILE array with a single receiver for Digital Beamforming. The advantages of this method include the drastically reduction in the computational burden and RF hardware. Performance of an 8×4 5.8 GHz uniform cylindrical array was studied.

  • A uni-planar fed 2D slot array for Digital Beamforming
    IEEE MTT-S International Microwave Symposium Digest 2005., 2005
    Co-Authors: Shinho Kim, Yuanxun Ethan Wang
    Abstract:

    A compact design of 2D antenna array for Digital Beamforming is proposed in this paper. The essential idea is based on switchable microstrip slot antennas in conjunction with spatial multiplexing of local elements (SMILE) techniques. The SMILE technique makes it possible to realize a series-fed Digital-Beamforming (DBF) antenna array in one dimension and leaves room for parallel element in the other dimension. This provides a simple way of constructing 2D DBF arrays with a simple and uni-planar feed network. It also offers other advantages such as low cost and compatibility with MMICs for the receiver system. A 4/spl times/4 receiving array test-bed at 5.5GHz operating frequency is fabricated and Digital Beamforming on this test-bed is successfully demonstrated in the E- and H- planes.

  • A compact microstrip slot antenna array for Digital Beamforming and MIMO applications
    Proceedings. 2004 IEEE Radio and Wireless Conference (IEEE Cat. No.04TH8746), 2004
    Co-Authors: Yuanxun Ethan Wang
    Abstract:

    This work presents a compact microstrip slot antenna array for Digital Beamforming and multi-input multi-output (MIMO) applications. Unlike the conventional arrays, furnished with parallel RF channels, the proposed array consists of four switchable slot radiators in series and operates at 5.5 GHz. This array offers several advantages such as compactness, low cost, and compatibility with MMICs. With the implementation of spatial multiplexing of local elements (SMILE) techniques, the array is able to receive information from multiple spatial channels using a single RF front-end. Design issues and Digital Beamforming performance of the antenna array are discussed. It is expected this array can be used for high speed mobile communication where MIMO or Beamforming applications are needed.

Rafael F. Rincon - One of the best experts on this subject based on the ideXlab platform.

  • NASA's L-Band Digital Beamforming Synthetic Aperture Radar
    IEEE Transactions on Geoscience and Remote Sensing, 2011
    Co-Authors: Rafael F. Rincon, Manuel A. Vega, Manuel Buenfil, Alessandro Geist, Lawrence Hilliard, Paul Racette
    Abstract:

    The Digital Beamforming Synthetic Aperture Radar (DBSAR) is a state-of-the-art L-band radar that employs advanced radar technology and a customized data acquisition and real-time processor in order to enable multimode measurement techniques in a single radar platform. DBSAR serves as a test bed for the development, implementation, and testing of Digital Beamforming radar techniques applicable to Earth science and planetary measurements. DBSAR flew its first field campaign on board the National Aeronautics and Space Administration P3 aircraft in October 2008, demonstrating enabling techniques for scatterometry, synthetic aperture, and altimetry.

Shinho Kim - One of the best experts on this subject based on the ideXlab platform.

  • A uni-planar fed 2D slot array for Digital Beamforming
    IEEE MTT-S International Microwave Symposium Digest 2005., 2005
    Co-Authors: Shinho Kim, Yuanxun Ethan Wang
    Abstract:

    A compact design of 2D antenna array for Digital Beamforming is proposed in this paper. The essential idea is based on switchable microstrip slot antennas in conjunction with spatial multiplexing of local elements (SMILE) techniques. The SMILE technique makes it possible to realize a series-fed Digital-Beamforming (DBF) antenna array in one dimension and leaves room for parallel element in the other dimension. This provides a simple way of constructing 2D DBF arrays with a simple and uni-planar feed network. It also offers other advantages such as low cost and compatibility with MMICs for the receiver system. A 4/spl times/4 receiving array test-bed at 5.5GHz operating frequency is fabricated and Digital Beamforming on this test-bed is successfully demonstrated in the E- and H- planes.

  • A series-fed microstrip receiving array for Digital Beamforming
    IEEE Antennas and Wireless Propagation Letters, 2004
    Co-Authors: Shinho Kim, Wang
    Abstract:

    A novel design of receiving arrays for Digital Beamforming purposes is proposed. The essential idea is based on a series-fed slot antenna array with spatial multiplexing of local elements (SMILE) techniques. The proposed approach offers several advantages such as compactness, low cost, and compatibility with monolithic microwave integrated circuits. A four-element receiving array test-bed at 5.5 GHz center frequency is fabricated and Digital Beamforming on this test-bed is successfully demonstrated.

  • A compact series-fed microstrip slot antenna array for Digital Beamforming
    IEEE Antennas and Propagation Society Symposium 2004., 2004
    Co-Authors: Shinho Kim, Yuanxun Wang
    Abstract:

    A compact design of antenna arrays for Digital Beamforming purposes is proposed. The essential idea is based on a series-fed slot antenna array with spatial multiplexing of local elements (SMILE) techniques. The proposed approach offers several advantages, such as compactness, low cost, and compatibility with MMICs. A 4-element array testbed at 5.5 GHz center frequency is fabricated and Digital Beamforming on this testbed is successfully demonstrated.

Rafael Rincon - One of the best experts on this subject based on the ideXlab platform.

  • IGARSS - Development of Next Generation Digital Beamforming Synthetic Aperture Radar architectures
    2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016
    Co-Authors: Rafael Rincon, Temilola Fatoyinbo, Batuhan Osmanoglu, Seung-kuk Lee, K. Jon Ranson, Guoqing Sun, Tobias Bollian
    Abstract:

    Next Generation Digital Beamforming (DBF) Synthetic Aperture Radar (SAR) is a technological area being pursued at the NASA Goddard Space Flight Center (GSFC). Two such systems - DBSAR-2 and EcoSAR-have been recently developed and tested. The new instruments employ advanced architectures characterized by multi-mode operation, software defined waveform generation, Digital Beamforming, and configurable radar parameters. The instruments have been developed to support several disciplines in Earth and Planetary sciences. This paper will describe EcoSAR and DBSAR-2 advanced features and report on the latest SAR processing and calibration efforts.

  • IGARSS - Digital Beamforming synthetic aperture radar (DBSAR): Single-pass interferometry for forest structure estimation
    2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
    Co-Authors: Rafael Rincon, Temilola Fatoyinbo, Batuhan Osmanoglu, Jon Ranson
    Abstract:

    Digital Beamforming permits the implementation of non-conventional measurement techniques, which can overcome fundamental limitations of conventional radar systems. In SAR systems, this technique can enable three-dimensional measurements using a single radar platform. A split phase center technique is implemented with NASA's Digital Beamforming SAR. The technique has the potential to provide volume structure estimates in tall forests and glaciers using a single radar platform.

  • IGARSS - Next generation Digital Beamforming Synthetic Aperture Radar (DBSAR-2)
    2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
    Co-Authors: Rafael Rincon, Temilola Fatoyinbo, Batuhan Osmanoglu, Seung-kuk Lee, K. Jon Ranson, Victor Marrero, Mark Yeary
    Abstract:

    The second generation Digital Beamforming SAR (DBSAR-2) is a state-of-the-art airborne L-band radar being developed at the NASA Goddard Space Flight Center (GSFC). The instrument employs a 16-channel radar architecture characterized by multi-mode operation, software defined waveform generation, Digital Beamforming, and configurable radar parameters. The instrument has been design to support several disciplines in Earth and Planetary sciences. This technology seeks to establish the Next Generation SAR as a science instrument while setting a path future airborne and spaceborne SAR missions.

  • Digital Beamforming Synthetic Aperture Radar (DBSAR) Polarimetric Upgrade
    2011
    Co-Authors: Rafael Rincon, Martin Perrine, Matthew Mclinden, Susan Valett
    Abstract:

    The Digital Beamforming Synthetic Aperture Radar (DBSAR) is a state-of-the-art radar system developed at NASA/Goddard Space Flight Center for the development and implementation of Digital Beamforming radar techniques. DBSAR was recently upgraded to polarimetric operation in order to enhance its capability as a science instrument. Two polarimetric approaches were carried out which will be demonstrated in upcoming flight campaigns.