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首页> 外文期刊>IEEE Transactions on Vehicular Technology >Phase-Coded FMCW Automotive Radar: System Design and Interference Mitigation
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Phase-Coded FMCW Automotive Radar: System Design and Interference Mitigation

机译：调相FMCW汽车雷达：系统设计和干扰缓解

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摘要

A frequency-modulated continuous-wave (FMCW) radar takes advantage of stretch processing (dechirping, deramping) to reduce the sampling requirements of radar systems such as automotive radars. When applying phase coding into FMCW radar systems for interference mitigation or joint communication, preservation of this benefit is not possible, due to the nature of this process. This paper proposes a new phase coded FMCW system as well as a processing strategy based on a group-delay filter to deal with unaligned phase-coded radar return signals. Moreover, this paper proposes an improved interference mitigation method based on a phase-coded linear- frequency-modulated (LFM) continuous waveform and points out the improvements in the signal-to-interference ratio (SIR). In the proposed mitigation technique, unlike the traditional approach where RF spectrum spreads, the beat frequency spectrum of the FMCW radar spreads, thus the bandwidth of RF hardware stays the same as a classical LFM continuous wave radar. The success of the proposed phase coded frequency-modulated continuous-wave (PC-FMCW) radar is illustrated in simulations and increased interference mitigation performance is validated by experiments.
机译：调频连续波（FMCW）雷达利用拉伸处理（去毛刺，去斜坡）的优势来降低诸如汽车雷达之类的雷达系统的采样要求。当将相位编码应用于FMCW雷达系统以减轻干扰或进行联合通信时，由于此过程的性质，无法保留此优势。本文提出了一种新的相位编码FMCW系统，以及一种基于群时延滤波器的处理策略，用于处理未对准的相位编码雷达返回信号。此外，本文提出了一种基于相位编码线性调频（LFM）连续波形的改进的干扰缓解方法，并指出了信噪比（SIR）的改进。在所提出的缓解技术中，与传统方法不同，传统方法中RF频谱会扩展，而FMCW雷达的拍频频谱也会扩展，因此RF硬件的带宽与经典LFM连续波雷达保持相同。仿真结果表明了所提出的相位编码调频连续波（PC-FMCW）雷达的成功，并通过实验验证了提高的干扰缓解性能。

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