Tamura Coarseness for Evaluating OTH Radar Image and Its Application in RFI Suppression
Hang Zhan, Zhongtao Luo, Zishu He, Kun Lu · 2019
This paper introduces Tamura coarseness as a reasonable index for evaluating the quality of range-Doppler (RD) map in over-the-horizon (OTH) radar. Tamura coarseness is calculated as the texture coarseness of a gray image which is transformed from the RD map. Our analysis shows that Tamura coarseness can correctly reflect the radio frequency interference (RFI) in the RD image and is also robust when the gray transforming function changes. As an example of applications, this paper uses Tamura coarseness to improve the interference suppression algorithm, so that the suppression can be optimized adaptively. Simulation results show that Tamura coarseness can be used as a quality index of the RD image and helps to suppress the interference perfectly.