Photonic-assisted space-frequency two-dimensional compressive radar receiver for high-resolution and wide-range detection

Release time:2023-05-08  Hits:

• DOI number:10.1364/OE.460295
• Journal:OPTICS EXPRESS
• Abstract:Existing photonic compressive receivers have the problem of resolution deterioration when applied in wide-range radar detection. In this study, we propose a photonic-assisted spacefrequency two-dimensional (2D) compressive radar receiver capable of achieving high-resolution detection in wide-range scenarios. For the space dimension, the compression process is realized by employing a spatially adaptive photonic projection basis, which guarantees complete mapping of arbitrarily delayed echoes-the key to high-resolution wide-range detection. For the frequency dimension, photonic compressive sensing is employed to further compress the bandwidth of the projected sparse signal. Therefore, the proposed system can achieve wide-range radar detection without resolution deterioration with compressed output. Herein, with two channels of 630 MHz outputs, high-resolution distance detection within a range of 21 km with a resolution of up to 2.3 cm is achieved. Moreover, inverse synthetic aperture radar (ISAR) imaging of two sets of four-point turntables distributed within the range of 21 km with a resolution of 2.3 cm x 5.7 cm is realized. The proposed photonic-assisted 2D compressive radar receiver is a viable solution to overcome the tradeoff between detection resolution and range of existing photonic compressive receivers, which indicates a path for the further development of high-resolution wide-range radar detection. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
• First Author:Xu, Yirong, Li, Shangyuan, Zhu, Zhengyuan, Xue, Xiaoxiao, Zheng, Xiaoping, Zhou, Bingkun
• Indexed by:J
• Document Type:Article
• Volume:30
• Issue:17
• Page Number:31017
• ISSN No.:1094-4087
• Translation or Not:no