Central Iowa Section Meeting – Digital Techniques to Combat Nonlinear Distortion

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The IEEE Central Iowa Section will meet again this month via Zoom because of the continuing COVID - 19 pandemic.  We have been invited to join the Engineers Club of Des Moines this month for their meeting.  The Central Iowa Joint Chapter will be joining us for this meeting. 


Amplifiers found in radio transmitters and receivers are often assumed to be linear systems, but when they operate near their limits, nonlinear effects can cause distortion and spectral leakage. Digital nonlinear compensation techniques improve the linearity of both transmitters and receivers. On the transmit side, digital pre-distortion (DPD) allows power amplifiers to run near saturation, where they are most efficient, without introducing nonlinear distortion in band or in neighboring channels. On the receive side, nonlinear equalization (NLEq) increases receiver dynamic range, allowing detection of very weak signals. DPD and NLEq both require power efficient digital implementations to maintain the efficiency of the overall system. Effects of nonlinear distortion and techniques to combat it will be presented.



  Date and Time

  Location

  Hosts

  Registration



This will be a virtual meeting via Zoom. When you register and provide your contact information, you will receive an email message before the meeting with the information needed to join the presentation.

  • Van Meter, Iowa
  • United States 50261

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  • Co-sponsored by Engineers Club of Des Moines
  • Starts 02 April 2021 02:34 PM
  • Ends 08 April 2021 06:00 PM
  • All times are US/Central
  • No Admission Charge
  • Register


  Speakers

Andrew K. Bolstad of Iowa State University

Topic:

Digital Techniques to Combat Nonlinear Distortion

Amplifiers found in radio transmitters and receivers are often assumed to be linear systems, but when they operate near their limits, nonlinear effects can cause distortion and spectral leakage. Digital nonlinear compensation techniques improve the linearity of both transmitters and receivers. On the transmit side, digital pre-distortion (DPD) allows power amplifiers to run near saturation, where they are most efficient, without introducing nonlinear distortion in band or in neighboring channels. On the receive side, nonlinear equalization (NLEq) increases receiver dynamic range, allowing detection of very weak signals. DPD and NLEq both require power efficient digital implementations to maintain the efficiency of the overall system. Effects of nonlinear distortion and techniques to combat it will be presented.

Biography:

Andrew K. Bolstad is an adjunct assistant professor of electrical engineering at Iowa State University. Prior to joining the faculty at ISU, he was a technical staff member at MIT Lincoln Laboratory in the Advanced RF Technology and Systems Group. His research interests include nonlinear digital compensation, spectrum intelligence, sparse models, compressed sensing, and machine learning. Dr. Bolstad is a member of the IEEE Signal Processing Society. He has published several journal and conference papers and has been awarded four patents. He was a co-author of the 2015 GOMACTech Best Poster Paper and a recipient of the 2012 MIT Lincoln Laboratory Team Award. Dr. Bolstad received a BS in EE from Iowa State University and an MS and PhD from the University of Wisconsin, Madison.

Email:

Address:3212 Coover, 2520 Osborn Dr, Ames, Iowa, United States, 50011-1046





Agenda

6:45 PM – Meeting Room opens

7:00 PM – Opening remarks

7:10 PM – Presentation



To receive information on how to connect to the presentation, please register by clicking the Register Now button above and entering your contact information. You will receive an email message before the meeting with the necessary information to join the presentation.