FRFT-Based Interference Suppression for Automotive FMCW Radars

IF 7.1 2区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Vehicular Technology Pub Date : 2025-02-07 DOI:10.1109/TVT.2025.3539790

Youlong Weng;Guangzhi Chen;Jingxuan Chen;Ziang Zhang;Zhiyu Jia;Shunchuan Yang;Donglin Su

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Abstract

Automotive radars are widely deployed in advanced driver assistance systems (ADASs) and autonomous driving. However, the increased vehicles equipped with radars make mutual interferences in automotive radars become an nonnegligible issue. The incoherent interferences between automotive frequency modulated continuous wave (FMCW) radars can significantly increase the noise level, leading to the degeneration of target detection. To address the problem, this article proposes an interference suppression approach based on the Fractional Fourier Transform (FRFT). It is noted that the interference component in the intermediate frequency (IF) signal exhibits chirp-like characteristics, which shows the energy concentration in a FRFT domain. Therefore, the interference component can be easily filtered out in the FRFT domain. Additionally, to decrease the computational cost in the presence of multiple interferences, a two-dimensional (2-D) constant false alarm rate (CFAR) detector is utilized to detect interference components. The proposed approach is also effective in scenarios with a large proportion of interference samples. Both simulations and field experiments demonstrate the performance of the proposed approach.

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基于frft的汽车FMCW雷达干扰抑制

汽车雷达广泛应用于高级驾驶辅助系统（ADASs）和自动驾驶中。然而，随着车载雷达装备车辆的增多，车载雷达的相互干扰成为一个不容忽视的问题。汽车调频连续波（FMCW）雷达之间的非相干干扰会显著提高雷达的噪声水平，导致目标探测性能下降。针对这一问题，本文提出了一种基于分数阶傅立叶变换（FRFT）的干扰抑制方法。注意到中频信号中的干扰分量表现出类似啁啾的特征，这表明能量集中在FRFT域中。因此，在FRFT域中可以很容易地滤除干扰分量。此外，为了降低存在多个干扰时的计算成本，利用二维（2-D）恒定虚警率（CFAR）检测器检测干扰成分。该方法在干扰样本比例较大的情况下也很有效。仿真和现场实验验证了该方法的有效性。

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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来源期刊

IEEE Transactions on Vehicular Technology 工程技术-电信学

CiteScore

6.00

自引率

8.80%

发文量

1245

审稿时长

6.3 months

期刊介绍： The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.