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Dazhi Xu

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Proceedings Article | 29 March 2023 Paper

Long-time coherent accumulation algorithm for variable acceleration maneuvering targets based on TRT

Shu Zhang, Ming Li, Dazhi Xu

Proceedings Volume 12594, 125942R (2023) https://doi.org/10.1117/12.2671466

KEYWORDS: Detection and tracking algorithms, Target detection, Doppler effect, Radar signal processing, Monte Carlo methods, Silicon, Signal detection, Pulse signals, Computer simulations, Signal to noise ratio

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Aiming at the high-order range walk and Doppler walk problems encountered by maneuvering targets in the long-time coherent accumulation process, a long-time coherent accumulation algorithm for variable acceleration maneuvering targets based on time reversing transform (TRT) is proposed. Firstly, the time series inversion transformation is performed on the echo signal after de-carrier frequency and pulse compression, which can correct the linear distance walking caused by the maneuvering target speed and the high-order distance walking and Doppler walking caused by the variable acceleration. Multi-linear function transformation is used to correct the second-order range walk and linear Doppler walk caused by acceleration. Finally, FFT and IFFT are used to achieve coherent accumulation of target energy. Simulation experiments show that the proposed algorithm is effective in correcting the moving objects with variable acceleration. At the same time, the detection performance of the algorithm is better than that of the PHAF algorithm, the RFT algorithm, the RFRFT algorithm and the RFRAF algorithm. It has lower computational complexity and does not require search for motion parameters.

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