The last few years have witnessed a tremendous growth of the demand for wireless services and a significant increase of the number of mobile subscribers. A recent data traffic forecast from Cisco reported that the global mobile data traffic reached 1.2 zettabytes per year in 2016, and the global IP traffic will increase nearly threefold over the next 5 years. Based on these predictions, a 127-fold increase of the IP traffic is expected from 2005 to 2021. It is also anticipated that the mobile data traffic will reach 3.3 zettabytes per year by 2021, and that the number of mobile-connected devices will reach 3.5 per capita.
With such demands for higher data rates and for better quality of service (QoS), fifth generation (5G) standardization initiatives, whose initial phase was specified in June 2018 under the umbrella of Long Term Evolution (LTE) Release 15, have been under vibrant investigation. In particular, the International Telecommunication Union (ITU) has identified three usage scenarios (service categories) for 5G wireless networks: (i) enhanced mobile broadband (eMBB), (ii) ultra-reliable and low latency communications (uRLLC), and (iii) massive machine type communications (mMTC). The vast variety of applications for beyond 5G wireless networks has motivated the necessity of novel and more flexible physical layer (PHY) technologies, which are capable of providing higher spectral and energy efficiencies, as well as reduced transceiver implementations.
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For our November 2011 edition, we focus on patents in the area of Radar Signal Processing. The selection below includes patents issued in the recent past, ranging from deblurring, resolution enhancement, and clutter filtering of radar images, applications to vehicular radar, and fundamentally new architectures and acquisition methods based on ramp signals, OFDM signals. If you have an interesting patent to share when we feature Radar Signal Processing-related patents the next time, or if you are especially interested in a signal processing research field that you would want to be highlighted in this section, please send email to Shantanu Rane (rane AT merl DOT com).
US 8,044,846, "Method for deblurring radar range-doppler images", by H. Urkowitz and J. Cammerata, filed 29 November 2007, issued 25 October 2011, assigned to Lockheed Martin Corporation (Bethesda, MD).
US 8,035,545, "Vehicular surveillance system using a synthetic aperture radar", by J. Pruett, T. Adams, C. Moshenrose and J. Grimm, filed 13 March 2009, issued 11 October 2011, assigned to Raytheon Company (Waltham, MA).
US 8,026,841, "Range and azimuth resolution enhancement for real-beam radar", by G. Liu and K. Yang, filed 18 September 2008, issued 27 September 2011, assigned to BAE Systems Controls Inc. (Johnson City, NY).
US 8,004,327, "Phase locked oscillator and radar unit having the same", by H. Hongo, filed 22 February 2010, issued 23 August 2011, assigned to Fujitsu Limited (Kawasaki, Japan).
US 7,999,724, "Estimation and correction of error in synthetic aperture radar", by K. Cho, filed 15 December 2008, issued 16 August 2011, assigne to The Boeing Company (Chicago, IL).
US 7,994,969, "OFDM frequency scanning radar", by K. Van Caekenberghe, K. Brakora and K. Sarabandi, filed 19 September 2008, issued 9 August 2011, assigned to The Regents of The University of Michigan (Ann Arbor, MI).
US 7,990,311, "Adaptive clutter filter for maritime surface search radar", by M. Pauli and J. Blind, filed 30 October 2009, issued 2 August 2011, assigned to Raytheon Applied Signal Technology, Inc. (Sunnyvale, CA).
US 7,973,703, "Method and apparatus for creating and processing universal radar waveforms", by J. Burri, M. Farris, M. Pohlman, and R. Potter, filed 20 July 2010, issued 5 July 2011, assigned to Arete Associates (Northridge, CA).
US 7,961,138, "Detecting operational radar angles based on wavelength specific electromagnetic propagation and surface interaction ", by M. Govoni, filed 25 August 2009, issued 14 June 2011, assigned to United States of America, Secretary of the Army (Washington, DC).
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