| 摘要: |
| 本研究旨在开发一种基于调频连续波的无人机载单比特微型合成孔径雷达 （NanoSAR） 系统。该系统具有微型化和低功耗等优势，能够在低空遥感作业中快速获取高分辨率图像。在保持成像质量的前提下，为了降低系统功耗，本文对单比特成像技术进行研究，通过一位量化减少数据量，并结合频谱偏移技术有效抑制高次谐波对成像质量的影响。我们将NanoSAR系统搭载于中小型无人机进行数据采集，采用基于距离徙动校准的距离多普勒算法对回波数据进行成像处理，并对单比特数据的SAR成像效果进行了验证。 |
| 关键词: 调频连续波 微型合成孔径雷达 单比特量化 雷达信号处理 |
| DOI：DOI:10.3969/j.issn.1672-2337.2025.01.003 |
| 分类号:TN958 |
| 基金项目:国家自然科学基金（No.61925108， 62220106009， 62371306） |
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| UAV⁃Mounted 1⁃bit Nano Synthetic Aperture Radar System |
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WANG Wei, LONG Tianyao, HUANG Lei
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1. College of Electronics and Information Engineering, Shenzhen University, Shenzhen 518060, China;2. State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen 518060, China
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| Abstract: |
| This study aims to develop a UAV?mounted 1?bit nano synthetic aperture radar （NanoSAR） system based on frequency?modulated continuous wave （FMCW） technology. The system offers advantages such as miniaturization and low power consumption, enabling rapid acquisition of high?resolution images in low?altitude remote sensing operations. To reduce system power consumption while maintaining the image quality, 1?bit imaging technology is explored by applying 1?bit quantization to reduce data volume and employing spectral shifting techniques to effectively suppress the influence of higher?order harmonics on image quality. The NanoSAR system is mounted on a small?to?medium?sized UAV for data collection, and the range?Doppler algorithm, calibrated for range migration, is applied to process the echo data. The SAR imaging performance of 1?bit data is validated, and the system demonstrates a resolution capability of 0.1 m. |
| Key words: FMCW NanoSAR 1⁃bit quantization radar signal processing |
