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Andrew O'Brien

  • Research Scientist, Electroscience Lab
  • Room #165
    1330 Kinnear Road
    Columbus, OH 43212
  • 614-292-1403

About


Education:
Andrew O'Brien earned his BS (2004), MS (2007) and PhD (2009) in Electrical and Computer Engineering from The Ohio State University. Since 2003, he has worked at The Ohio State University ElectroScience Laboratory as an undergraduate researcher, a graduate research associate, and a postdoctoral researcher. From Sept. 2008 to Dec. 2009, he was the recipient of an AFRL Fellowship. Since April 2011, he has been a senior research associate at the ElectroScience Laboratory.  

Research Interests:
Dr. O'Brien's primary areas of research are Global Navigation Satellite System (GNSS) receivers, antenna arrays, antenna electronics, and adaptive array signal processing. Over the past nine years, he modeled, simulated, and analyzed the performance of interference suppression algorithms, characterized their precise effects on GPS receiver measurements, and performed extensive simulation of antennas on aircraft platforms. He developed novel algorithms and techniques for mitigation of antenna-induced bias errors in order to allow the use of adaptive antenna systems in precision GNSS applications. He studied the effects of platform scattering on GNSS receivers mounted on fixed-wing aircraft and helicopters, for which he developed techniques for precise analysis of rotor blade modulation effects on GNSS signals.  He has investigated platform multipath mitigation techniques for airborne GNSS receivers. He is also investigating efficient and practical techniques for precision antenna calibration of adaptive antenna arrays on platforms, including self-calibration algorithms. Additionally, he is developing tight-integration techniques between GNSS receivers and adaptive antenna electronics in order to provide enhanced capabilities for next generation GNSS adaptive antennas.