ReMCW: Reduced Bandwidth FMCW Radar for Autonomous Driving

2019 53rd Asilomar Conference on Signals, Systems, and Computers Pub Date : 2019-11-01 DOI:10.1109/IEEECONF44664.2019.9048773

K. Mishra, Z. Slavik, O. Bringmann

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引用次数: 3

Abstract

Automotive radar is an all-weather sensing technology that makes direct measurements of target motion thereby aiding in unmanned driving. Continuous-wave (CW) radars which use linear frequency modulation (FM) have been the most popular automotive sensing systems because of lower cost, higher range resolution, and lower transmit power than a pulse Doppler radar. The available spectrum for vehicular systems is limited and, therefore, avoiding mutual interference from multiple automotive radars operating in the same spectrum in a crowded traffic scenario is a major challenge. To address this, we present a Reduced bandwidth FMCW (ReMCW) radar that consumes less spectral resources without decreasing the range resolution and enables interference-free operation. Our CW radar waveform transmits few randomly chosen slopes within the original FMCW sweep. This waveform avoids range- Doppler coupling encountered in conventional FMCW radars. The parameters used for the design of this waveform conform to current automotive radar requirements. Numerical experiments with ReMCW show great savings in spectrum over the conventional FMCW radar.

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ReMCW:用于自动驾驶的低带宽FMCW雷达

汽车雷达是一种全天候传感技术，可以直接测量目标运动，从而帮助无人驾驶。使用线性调频(FM)的连续波(CW)雷达已经成为最受欢迎的汽车传感系统，因为它比脉冲多普勒雷达成本更低，距离分辨率更高，发射功率更低。车辆系统的可用频谱有限，因此，在拥挤的交通场景中，避免在同一频谱上运行的多个汽车雷达的相互干扰是一个主要挑战。为了解决这个问题，我们提出了一种减少带宽的FMCW (ReMCW)雷达，它在不降低距离分辨率的情况下消耗更少的频谱资源，并且可以实现无干扰操作。我们的连续波雷达波形在原始的FMCW扫描中传输一些随机选择的斜率。这种波形避免了传统FMCW雷达中遇到的距离-多普勒耦合。用于设计该波形的参数符合当前汽车雷达的要求。数值实验表明，与传统的FMCW雷达相比，ReMCW雷达在频谱方面有很大的节省。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 53rd Asilomar Conference on Signals, Systems, and Computers

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