Abstract
Wide-spatial radar surveillance missions are challenging tasks, requiring an increased power budget and agility in transmission aimed at extracting information from multiple targets in different environments. These requirements necessitate high transmitting degrees of freedom (DOF) to achieve the objective of multiscale observation for specific tasks in specialized regions of interest. Herein, we exploit the multiscale observation ability in wide-spatial radar surveillance based on frequency diverse array (FDA) radar. The proposed method facilitates spatial anisotropic control of multiple radar resources, including the transmitting waveforms, beampattern, and bandwidth. By utilizing a coherent FDA radar, we offer principles for the selection of baseband waveforms, in addition to the quantitative design of the beampattern gain and optimal bandwidth from the perspective of detection. The feasibility of the proposed method is validated through numerical experiments, thus indicating the potential in wide-spatial radar surveillance. Moreover, this work can be regarded as a preliminary attempt to gauge the efficacy of the computational array, a novel academic concept.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (Grant Nos. 62271495, 42205142, 62101561). The author would like to thank Dr. Qilei ZHANG for providing the real measured wideband data acquired in Hefei international airport.
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Yu, L., He, F. & Su, Y. Multiscale observation in wide-spatial radar surveillance based on coherent FDA design. Sci. China Inf. Sci. 67, 122304 (2024). https://doi.org/10.1007/s11432-022-3816-3
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DOI: https://doi.org/10.1007/s11432-022-3816-3