volume | PIER Journals

Abstract

In order to enhance the detection capability of small targets, long-term coherent integration (LTCI) is commonly employed. The core idea of LTCI is to accumulate target energy over an extended observation period, thereby enhancing the signal-to-noise ratio (SNR) of the target signal. However, for maneuvering targets, defocusing may occur due to range migration (RM) and Doppler frequency migration (DFM). In this study, a novel method based on the keystone transform and improved 3-D coherent integration (KT-ITDCI) for maneuvering target detection is proposed. KT-ITDCI not only eliminates the RM induced by unambiguous velocity through KT, but also compensates for residual RM and DFM in the KT-processed echoes via ITDCI, ultimately achieving coherent integration. Simulation results show that, compared with the TDCI method, KT-ITDCI significantly reduces computational complexity while maintaining comparable noise resistance. Furthermore, the effectiveness of the proposed method is further validated through processing and analyzing real measured radar data.

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Dr. Aihua Li

Ms. Wei Liu

Dr. Yuhang Wang

Dr. Wenwen Xu

Dr. Jianyin Cao

Professor Hao Wang