Forward-looking automotive radars can sense long-distant targets to enable early warning, but the lateral resolution is limited. Synthetic aperture radar (SAR) techniques can achieve very high azimuth resolution but cannot resolve targets in the forward direction. As a trade-off, squint-forward-looking SAR (SFL-SAR) can perform 2D imaging on a distant area squint to the moving direction, providing both high resolution and early warning. In this paper, we analyzed and derived the constraints of automotive SFL-SAR to satisfy both the required resolution and braking distance. Simulations and imaging results verified the analysis.

中文翻译：

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汽车斜视前视 SAR：高分辨率和早期预警

前视汽车雷达可以感知远距离目标以实现预警，但横向分辨率有限。合成孔径雷达 (SAR) 技术可以实现非常高的方位角分辨率，但无法解析前向目标。作为一种权衡，斜视前视 SAR（SFL-SAR）可以对向运动方向斜视的远处区域进行二维成像，提供高分辨率和早期预警。在本文中，我们分析并推导了汽车 SFL-SAR 的约束，以满足所需的分辨率和制动距离。模拟和成像结果验证了分析。