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    • 1. 发明授权
    • FM-CW radar system for measuring distance to and relative speed of target
    • FM-CW雷达系统,用于测量目标距离和相对速度
    • US6097331A
    • 2000-08-01
    • US283162
    • 1999-04-01
    • Kazuoki MatsugataniMasanobu Yukumatsu
    • Kazuoki MatsugataniMasanobu Yukumatsu
    • G01S7/285G01S7/35G01S13/34G01S13/93G01S13/00
    • G01S7/35G01S13/34G01S13/931G01S2013/9321
    • An FM-CW radar apparatus is provided which may be employed in automotive anti-collision or radar cruise control systems. The radar apparatus transmits as a radar wave a high-frequency signal which is so modulated in frequency with a modulating signal as to vary with time in the form of a triangular wave and mixes a received signal with a local signal that is part of the transmitted signal to produce a beat signal consisting of a fundamental frequency component as a function of the distance to and relative speed of a target object. The radar apparatus also includes an amplitude modulator which modulates the amplitude of at least one of the transmitted signal, the received signal, and the local signal in accordance with the modulating signal so that the modulation index falls within a range of zero (0) to one (1). This allows harmonic components with an improved SN ratio to be extracted from the beat signal which may be used in calculating the fundamental frequency component of the beat signal.
    • 提供了可用于汽车防碰撞或雷达巡航控制系统的FM-CW雷达装置。 雷达装置作为雷达波发送频率如此调制的高频信号,其中调制信号以三角波的形式随时间变化,并将接收的信号与作为发送的一部分的本地信号混合 信号以产生由基频分量组成的拍频信号作为目标对象的距离和相对速度的函数。 雷达装置还包括幅度调制器,其根据调制信号调制发射信号,接收信号和本地信号中的至少一个的振幅,使得调制指数落在零(0)到 一(1)。 这允许从拍频信号中提取具有改善的SN比的谐波分量,这可以用于计算拍频信号的基频分量。