Open AccessModified reference window for two‐dimensional CFAR in radar target detection
Author(s) -
Wang Weijiang,
Wang Runyi,
Jiang Rongkun,
Yang Hao,
Wang Xiaoyu
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0687
Subject(s) - constant false alarm rate , false alarm , statistical power , computer science , radar , sliding window protocol , detector , window (computing) , range (aeronautics) , algorithm , artificial intelligence , mathematics , statistics , telecommunications , engineering , aerospace engineering , operating system
The constant false alarm rate (CFAR) technology plays an important role in radar target detection. In cell averaging CFAR detectors, a reference window is usually adopted to estimate the average interference power in the range–Doppler matrix and to obtain the detection threshold, which should be set high enough to limit false alarm rate to a tolerably small rate. The conventional rectangular window, cross window, and column window are investigated in this study, which may suffer from a degraded detection performance due to involving some extraneous reference cells. Therefore, a modified reference window for two‐dimensional CFAR is proposed to improve performance, depending on the distribution characteristics of radar targets in range and Doppler dimensions. The experimental results demonstrate its performance advantages on detection probability, CFAR loss, and figure of merit.