Auto-focused imaging of a moving target using an ultra-wideband array radar

T. Sakamoto, T. Sato, P. Aubry, A. Yarovoy

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


The authors have developed a target speed estimation method for an ultra-wideband radar imaging system. The method is able to generate a focused image even if the target is moving at an unknown speed during the measurement, where many other techniques produce blurred images. Our technique uses the cross-range blurriness as a metric to measure the image focusing, and select the best-focused image among many generated for various candidate speeds. The target speed is estimated by finding the minimum cross-range blurriness, and the method compensates for the estimated speed to generate a focused three-dimensional image automatically. By exploiting the fact that the head size differs relatively little among individuals, we detected the head position in a radar image, and calculated the blurriness around the region to evaluate the focuse of the image. The speed estimation method is applied to the measurement of a mannequin on a moving stage, and it is shown that the target speed is estimated with an accuracy of 5%. Application results show that the developed technique can estimate target speeds accurately, and produce an image with sufficient resolution for the intended application.

Original languageEnglish
Title of host publicationProceedings of PIERS 2015
PublisherElectromagnetics Academy
Number of pages4
ISBN (Electronic)978-193414230-1
Publication statusPublished - Jan 2015
EventProgress in Electromagnetics Research Symposium, PIERS 2015 - Prague, Czech Republic
Duration: 6 Jul 20159 Jul 2015


ConferenceProgress in Electromagnetics Research Symposium, PIERS 2015
Abbreviated titlePIERS
CountryCzech Republic


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