Frontiers of Information Technology & Electronic Engineering
>> 2020,
Volume 21,
Issue 8
doi:
10.1631/FITEE.1900272
Efficient coherent detection of maneuvering targets based on location rotation transform and non-uniform fast Fourier transform
Affiliation(s): National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450001, China; School of Electronics and Communication Engineering, Sun Yat-Sen University, Guangzhou 510000, China; Anhui Institute of Quality and Standardization, Hefei 230000, China; less
Received: 2019-05-29
Accepted: 2020-08-07
Available online: 2020-08-07
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Abstract
Long-term can remarkably improve the ability of detection and motion of radar for s. However, the linear range migration, quadratic range migration (QRM), and Doppler frequency migration within the coherent processing interval seriously degrade the detection and estimation performance. Therefore, an efficient and noise-resistant method based on and is proposed. QRM is corrected by the second-order keystone transform. Using the relationship between the rotation angle and Doppler frequency, a novel phase compensation function is constructed. Motion parameters can be rapidly estimated by LRT and NuFFT. Compared with several representative algorithms, the proposed method achieves a nearly ideal detection performance with low computational cost. Finally, experiments based on measured radar data are conducted to verify the proposed algorithm.
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