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Miniaturization Design of High-Integration Unmanned Aerial Vehicle-Borne Video Synthetic Aperture Radar Real-Time Imaging Processing Component

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Publicado en:Remote Sensing vol. 16, no. 7 (2024), p. 1273
Autor principal: Yang, Tao
Otros Autores: Wang, Tong, Zheng, Nannan, Zhang, Shuangxi, Meng, Fanteng, Zhang, Xinyu, Wu, Qirui
Publicado:
MDPI AG
Materias:
Image resolution
Algorithms
Radar
Frames per second
Signal processing
Broadband
Unmanned aerial vehicles
Power consumption
Radar imaging
Design
Miniaturization
Floating point arithmetic
Field programmable gate arrays
Data points
Signal generation
Fourier transforms
Synthetic aperture radar
Moving targets
High speed
Multiplexing
Real time
Ground stations
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Resumen:The unmanned aerial vehicle (UAV)-borne video synthetic aperture radar (SAR) possesses the characteristic of having high-continuous-frame-rate imaging, which is conducive to the real-time monitoring of ground-moving targets. The real-time imaging-processing system for UAV-borne video SAR (ViSAR) requires miniaturization, low power consumption, high frame rate, and high-resolution imaging. In order to achieve high-frame-rate real-time imaging on limited payload-carrying platforms, this study proposes a miniaturization design of a high-integration UAV-borne ViSAR real-time imaging-processing component (MRIPC). The proposed design integrates functions such as broadband signal generation, high-speed real-time sampling, and real-time SAR imaging processing on a single-chip FPGA. The parallel access mechanism using multiple sets of high-speed data buffers increases the data access throughput and solves the problem of data access bandwidth. The range-Doppler (RD) algorithm and map-drift (MD) algorithm are optimized using parallel multiplexing, achieving a balance between computing speed and hardware resources. The test results have verified that our proposed component is effective for the real-time processing of 2048 × 2048 single-precision floating-point data points to realize a 5 Hz imaging frame rate and 0.15 m imaging resolution, satisfying the requirements of real-time ViSAR-imaging processing.
ISSN:2072-4292
DOI:10.3390/rs16071273
Fuente:Advanced Technologies & Aerospace Database