Title: An Overview of Compressing Sensing Techniques for Fast and Accurate NF Test
Speaker: Stuart F. Gregson; School of Electronic Engineering and Computer Sciences
Queen Mary University of London in London, UK & Next Phase Measurements in California, USA
Date: October 10, 2024
Time: 11:00 am – 12 pm US Eastern Time
Abstract
Compressive Sensing (CS) has been deployed in a variety of fields including wideband spectrum sensing, active user detection and antenna arrays. In massive MIMO arrays, CS has been applied to reduce the number of measurements required to verify the arrays excitation in a production environment. All follow the general approach of creating the sparsity needed for CS by subtracting the measured far-field or near-field of the test array from that of a ‘gold standard’ array measured under identical conditions. In our initial work the reconstruction of array excitation with a mean square error (MSE) of −30dB was achieved for a 20×28 element array antenna at half wavelength spacing using just 1.5% (177 samples) of the samples needed for a conventional NF measurement (12,100 samples) employing back projection to the aperture. Critical to the performance is the realization that the CS samples need to be confined to the central region of the NF measurement plane which for a conventional NF to FF planar antenna pattern measurement would offer a massive truncation error. This webinar addresses the optimal sampling strategy needed for this NF approach and presents a statistical performance analysis of the reconstruction accuracy.
Speaker Bio
Stuart F. Gregson received the B.Sc. degree in physics and the M.Sc. degree in microwave solid state physics from the University of Portsmouth, Portsmouth, U.K., in 1994 and 1995, respectively, and the Ph.D. degree in near-field antenna measurements and statistical pattern recognition from the Queen Mary University of London (QMUL), London, U.K., in 2003.,He has worked with Airbus Defence and Space, Portsmouth, Leonardo, Edinburgh, U.K., NSI-MI, Los Angeles, CA, USA, and the National Physical Laboratory, Teddington, U.K. He has more than 20 years of experience working in the space, aerospace, and communications sectors and is currently the Director of Operations and Research with Next Phase Measurements, Garden Grove, CA, USA, and also an Honorary Visiting Professor with the School of Electronic Engineering and Computer Science, QMUL. He has developed special experience with near-field antenna measurements, finite-array mutual coupling, computational electromagnetics, installed antenna and radome performance prediction, compact antenna test range design and simulation, electromagnetic scattering, and 5G over-the-air (OTA) measurements.
About AMTA Webinar Series:
The AMTA webinar series was introduced to highlight latest antenna measurement technologies to the AMTA community. Speakers are selected from the best papers presented at the AMTA conferences.
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