中圖分類號： TN951；TN957.51
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.223081
中文引用格式： 秦天慈，王中訓，黃勇，等. 一種修正k值的OS-CFAR檢測器[J].電子技術應用，2022，48(9)：1-5，38.
英文引用格式： Qin Tianci，Wang Zhongxun，Huang Yong，et al. An OS-CFAR detector with corrected k values[J]. Application of Electronic Technique，2022，48(9)：1-5，38.

An OS-CFAR detector with corrected k values

Abstract： The k value of OS-CFAR detector has the defect of uncertain value taking method. Considering the target echo signal in practical engineering application, after passing through the pulse compression matched filter, the output is the shape of SA function bell envelope. Therefore, when the k value is selected, the background clutter estimation may be taken into the energy unit of the interfering target, which makes the clutter estimation too large and leads to missed detection of the target. In this paper, a modified k-value method is proposed. When the OS-CFAR detector selects k-value, the target echo is considered as an extended target, so that the value of k is more accurate. Through detailed simulation experiments, it is found that the performance of OS-CFAR detector changes with k value under the two conditions of whether there are interfering targets in the reference sliding window, and it is proved that the OS-CFAR detector with modified k value has better performance in multi-target environment.

Key words : radar；target detection；CFAR