Developmentof vibro-Doppler super-resolution imaging and its experimental validation

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630179
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Measurement engineering
• Research Institution: Gunma University
• Principal Investigator: Takashi Miwa 群馬大学, 大学院理工学府, 准教授 (30313414)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: イメージング / 超解像 / ドップラ / 空間変調 / 加振

Outline of Final Research Achievements

Generally, the cross-range resolution in coherent imaging is restricted by a point spread function (PSF) of the sensor. Due to the low-pass characteristics of PSF in a spatial-frequency domain, we cannot obtain the high spatial-frequency information. In order to improve the cross range resolution, the bandwidth should widen in the spatial frequency domain. We propose a method in which the spatial frequency shift by using a vibro-Doppler measurement. In this research, we experimentally demonstrate the super-resolution method with vibro-Doppler measurement. The vibro-Doppler measurement can measure high spatial frequency information. Moreover, it can be applied to super-resolution imaging by applying amplitude compensation and demodulation of spatial frequency. we found that this method can improve the spatial resolution by 3 times through the experiment. However, a disadvantage of this method is SNR degradation.

Free Research Field

計測工学