Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for +publisher:"University of Oklahoma" +contributor:("McDaniel, Jay"). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Oklahoma

1. Peccarelli, Nicholas. Nonlinear Equalization and Digital Pre-Distortion Techniques for Future Radar and Communications Digital Array Systems.

Degree: PhD, 2020, University of Oklahoma

Modern radar (military, automotive, weather, etc.) and communication systems seek to leverage the spatio-spectral efficiency of phased arrays. Specifically, there is an increasingly large demand for fully-digital arrays, with each antenna element having its own transmitter and receiver. Further, in order to makes these systems realizable, low-cost, low-complexity solutions are required, often sacrificing the system's linearity. Lower linearity paired with the inherent lack of RF spacial filtering can make these highly digital systems vulnerable to high-power interferering signals – potentially introducing spectral regrowth and/or gain compression, distorting the signal-of-interest. Digital linearization solutions such as Digital Pre-Distiortion (DPD) and Nonlinear Equalization (NLEQ) have been shown to effectively mitigate nonlinearities for transmitters and receivers, respectively. Further, DPD and NLEQ seek to extend the effective dynamic range of digital arrays, helping the systems reach their designed dynamic range improvement of 10log10(N)~dB, where N is the number of transmitters/receivers. However, the performance of these solutions is ultimately determined by training model and waveform. Further, the nonlinear characteristics of a system can change with temperature, frequency, power, time, etc., requiring a robust calibration technique to maintain a high-level of nonlinear mitigation. This dissertation reviews the different types of nonlinear models and the current NLEQ and DPD algorithms for digital array systems. Further, a generalized calibration waveform for both NLEQ and DPD is proposed, allowing a system to maximize its dynamic range over power and frequency. Additionally, an it{in-situ} calibration method, leveraging the inherent mutual coupling in an array, is proposed as a solution to maintaining a high level of performance in a fielded digital array system over the system's lifetime. The combination of the proposed training waveform and it{in-situ} calibration technique prove to be very effective at adaptively creating a generalized solution to extending the dynamic range of future low-cost digital array systems. Advisors/Committee Members: Fulton, Caleb (advisor), Goodman, Nathan (committee member), Sigmarsson, Hjalti (committee member), McDaniel, Jay (committee member), Grigo, Alexander (committee member).

Subjects/Keywords: Nonlinear Equalization; Phased Array; Radar; Signal Processing

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Peccarelli, N. (2020). Nonlinear Equalization and Digital Pre-Distortion Techniques for Future Radar and Communications Digital Array Systems. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/324399

Chicago Manual of Style (16th Edition):

Peccarelli, Nicholas. “Nonlinear Equalization and Digital Pre-Distortion Techniques for Future Radar and Communications Digital Array Systems.” 2020. Doctoral Dissertation, University of Oklahoma. Accessed February 25, 2021. http://hdl.handle.net/11244/324399.

MLA Handbook (7th Edition):

Peccarelli, Nicholas. “Nonlinear Equalization and Digital Pre-Distortion Techniques for Future Radar and Communications Digital Array Systems.” 2020. Web. 25 Feb 2021.

Vancouver:

Peccarelli N. Nonlinear Equalization and Digital Pre-Distortion Techniques for Future Radar and Communications Digital Array Systems. [Internet] [Doctoral dissertation]. University of Oklahoma; 2020. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/11244/324399.

Council of Science Editors:

Peccarelli N. Nonlinear Equalization and Digital Pre-Distortion Techniques for Future Radar and Communications Digital Array Systems. [Doctoral Dissertation]. University of Oklahoma; 2020. Available from: http://hdl.handle.net/11244/324399

.