Jia, W.; Feng, Y.; Qiao, X.; Wang, T.; Shan, T. Variable Doppler Starting Point Keystone Transform for Radar Maneuvering Target Detection. Preprints2024, 2024031728. https://doi.org/10.20944/preprints202403.1728.v1
APA Style
Jia, W., Feng, Y., Qiao, X., Wang, T., & Shan, T. (2024). Variable Doppler Starting Point Keystone Transform for Radar Maneuvering Target Detection. Preprints. https://doi.org/10.20944/preprints202403.1728.v1
Chicago/Turabian Style
Jia, W., Tianrun Wang and Tao Shan. 2024 "Variable Doppler Starting Point Keystone Transform for Radar Maneuvering Target Detection" Preprints. https://doi.org/10.20944/preprints202403.1728.v1
Abstract
The Doppler band compensated by the keystone transform (KT) is limited. Therefore, it needs to be used in conjunction with the Doppler ambiguity compensation function to correct the range migration (RM) caused by maneuvering targets with Doppler ambiguity. However, the KT implemented by sinc interpolation suffers from significant performance loss at boundaries of compensation Doppler bands. Additionally, in a multi-target scenario, KT implementation methods occupy high complexity when the Doppler range of targets spans over two compensation Doppler bands. To address aforementioned issues, this study presents a variable Doppler starting point keystone transform (VDSPKT) method, where a new form of ambiguity compensation function is constructed, turning the Doppler starting point of the compensation band in KT variable. Firstly, the position of the compensation Doppler band is changed from fixed to adjustable as needed, enhancing the flexibility of KT. Crucially, the connection points of the compensation Doppler bands in sinc interpolation are reset, avoiding the performance loss at their boundaries. Also, the compensation band is adjusted to cover the narrow Doppler frequency range caused by targets, significantly improving the computational efficiency. Finally, the simulation results demonstrate that the proposed approach effectively addresses the performance degradation and high computational complexity of KT in the aforementioned scenarios, resulting in a computational load reduced by approximately 50% compared to traditional methods.
Keywords
maneuvering target detection; range migration (RM); keystone transform (KT); sinc interpolation; variable Doppler starting point keystone transform (VDSPKT)
Subject
Engineering, Telecommunications
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
