公开(公告)号：US06795012B2

公开(公告)日：2004-09-21

申请号：US10157660

申请日：2002-05-29

申请人： Motoi Nakanishi ,  Toru Ishii ,  Tetsu Nishimura

发明人： Motoi Nakanishi ,  Toru Ishii ,  Tetsu Nishimura

IPC分类号： G01S1393

CPC分类号： G01S13/345 ,  G01S7/352 ,  G01S13/584 ,  G01S13/931 ,  G01S2007/356

摘要： In a radar, a coupler extracts a part of a transmission signal as a local signal and a mixer mixes a reception signal from a circulator and the local signal so as to output an intermediate frequency signal which is the frequency difference between the transmission signal and the reception signal. An IF-amplifying circuit amplifies the intermediate frequency signal and an AD converter converts the signal to digital data. A DC-removing unit removes a DC component by subtracting the average from the data and an FFT operation unit performs fast Fourier transform so that the distance to a target and the relative velocity of the target are calculated based on a peak included in the frequency spectrum.

摘要翻译： 在雷达中，耦合器提取发送信号的一部分作为本地信号，并且混合器将来自循环器的接收信号与本地信号混合，以便输出作为发送信号和发送信号之间的频率差的中频信号 接收信号。 IF放大电路放大中频信号，AD转换器将信号转换为数字数据。 直流去除单元通过从数据中减去平均值来除去直流分量，并且FFT运算单元进行快速傅立叶变换，从而基于包括在频谱中的峰值来计算与目标的距离和目标的相对速度 。

公开(公告)号：US20050174282A1

公开(公告)日：2005-08-11

申请号：US10516924

申请日：2003-05-22

申请人： Motoi Nakanishi ,  Toru Ishii ,  Tetsu Nishimura

发明人： Motoi Nakanishi ,  Toru Ishii ,  Tetsu Nishimura

IPC分类号： G01S7/02 ,  G01S7/35 ,  G01S13/34 ,  G01S13/42 ,  G01S13/58 ,  G01S13/93

CPC分类号： G01S7/354 ,  G01S13/345 ,  G01S13/42 ,  G01S13/584 ,  G01S13/931 ,  G01S2007/356 ,  G01S2013/9353

摘要： An FM-CW radar detects at least one of the relative distance and the relative speed of a predetermined object based on the frequencies of projection portions observed in the frequency spectrums of beat signals in an ascending-modulation section and a descending-modulation section, where the projection portions are generated by one and the same object. The radar determines the moving speed of a predetermined moving object such as a vehicle or the like having the radar mounted thereon, and the frequency difference between the projection portions observed in the frequency spectrums of the beat signals in the ascending-modulation section and the descending-modulation section is inversely calculated, where the frequency difference corresponds to the stationary object, and a predetermined pair corresponding to the frequency difference is extracted on a priority basis.

摘要翻译： FM-CW雷达基于在上行调制部分和下行调制部分中的拍频信号的频谱中观察到的投影部分的频率来检测预定对象的相对距离和相对速度中的至少一个，其中 突出部分由同一个物体产生。 雷达确定安装有雷达的车辆等预定移动物体的移动速度，以及上升调制部中的拍频信号的频谱中观察到的投射部之间的频率差， 调制部分被反算，其中频差对应于静止对象，并且基于优先级提取对应于频差的预定对。

公开(公告)号：US06674395B2

公开(公告)日：2004-01-06

申请号：US10345962

申请日：2003-01-17

申请人： Motoi Nakanishi ,  Toru Ishii ,  Tetsu Nishimura

发明人： Motoi Nakanishi ,  Toru Ishii ,  Tetsu Nishimura

IPC分类号： G01S1334

CPC分类号： G01S7/4008 ,  G01S13/345 ,  G01S13/42 ,  G01S13/584 ,  G01S13/931

摘要： A radar system includes a transmitting/receiving unit, having a voltage controlled oscillator, for repeatedly transmitting a triangular transmission signal including a frequency-gradually-rising up-modulation interval and a frequency-gradually-dropping down-modulation interval and for receiving a reception signal including a reflected signal from a target, a frequency analysis unit, a data storing unit for storing time-varying characteristics of input values to a D/A converter that monotonically change an oscillation frequency of the voltage controlled oscillator with time, in the form of data concerning an expression representing the time-varying characteristics, and a data processing unit for determining the input values to the D/A converter with reference to the data. At least one of the relative distance to the target and the relative speed of the target is detected based on a beat signal during the up-modulation interval and the beat signal during the down-modulation interval.

摘要翻译： 一种雷达系统包括具有压控振荡器的发射/接收单元，用于重复发射包括频率逐渐升高的上调调制间隔和逐渐下降的下降调制间隔的三角形发送信号，并用于接收接收 信号，其包括来自目标的反射信号，频率分析单元，数据存储单元，用于将输入值的时变特性存储到D / A转换器，其以时间形式单调地改变压控振荡器的振荡频率，形式 关于表示时变特性的表达式的数据;以及数据处理单元，用于参考数据确定D / A转换器的输入值。 基于在上调制间隔期间的搏动信号和下调制间隔期间的拍频信号来检测与目标的相对距离和目标的相对速度中的至少一个。

公开(公告)号：US07336218B2

公开(公告)日：2008-02-26

申请号：US11588242

申请日：2006-10-27

申请人： Tetsu Nishimura ,  Toru Ishii

发明人： Tetsu Nishimura ,  Toru Ishii

IPC分类号： G01S13/526 ,  G01S13/93

CPC分类号： G01S13/345 ,  G01S13/426 ,  G01S13/931 ,  G01S2007/356 ,  G01S2013/9375

摘要： A radar system in which a beat signal is generated by transmitting a transmission signal that is subjected to frequency modulation into a triangular wave and receiving a reflection signal from a target, the beat signal is sampled, and a window function is applied to yield a discrete frequency spectrum. When the window function is applied, a first window function having an amplitude that is gently attenuated from the center of the sampling period toward both sides thereof is applied in a lower frequency band in the frequency spectrum (at close range), and a second window function having an amplitude that is sharply attenuated from the center of the sampling period toward both sides thereof is applied in a higher frequency band in the frequency spectrum (at far range).

摘要翻译： 一种雷达系统，其中通过将进行频率调制的发送信号发送到三角波并从目标接收反射信号来产生拍频信号，对拍子信号进行采样，并应用窗口函数以产生离散 频谱。 当应用窗口功能时，将具有从采样周期的中心向其两侧轻轻衰减的振幅的第一窗口功能施加在频谱（近距离）的较低频带中，并且第二窗口 具有从采样周期的中心向其两侧急剧衰减的幅度的功能被施加在频谱（远程）中的较高频带中。

公开(公告)号：US07928897B2

公开(公告)日：2011-04-19

申请号：US12428774

申请日：2009-04-23

申请人： Toru Ishii ,  Tetsu Nishimura

发明人： Toru Ishii ,  Tetsu Nishimura

IPC分类号： G01S13/58 ,  G01S13/00 ,  G01S13/32 ,  G01S13/93

CPC分类号： G01S13/42 ,  G01S13/343 ,  G01S13/345 ,  G01S13/46 ,  G01S13/583 ,  G01S13/931 ,  G01S2013/9375

摘要： A radar device includes a transmission antenna and a reception antenna having a plurality of antenna elements. The radar device switches the antenna elements in synchronization with a modulation cycle, thereby obtaining a reception signal. At this time, the radar device obtains the reception signal by switching the antenna elements using a first measurement phase and a second measurement phase having different switching cycles as one set. The radar device calculates an azimuth sine value sin θ1 from the reception signal in the first measurement phase and also calculates an azimuth sinusoidal value sin θ2 from the reception signal in the second measurement phase. Then, the radar device calculates a relative velocity V from the azimuth sine value sin θ1, the azimuth sine value sin θ2, an interval time difference Δt between switching cycles, and an inter-antenna element spacing d.

摘要翻译： 雷达装置包括发射天线和具有多个天线元件的接收天线。 雷达装置与调制周期同步地切换天线元件，从而获得接收信号。 此时，雷达装置通过使用具有不同开关周期的第一测量相位和第二测量相位作为一组来切换天线元件来获得接收信号。 雷达装置从第一测量阶段的接收信号计算方位正弦值sin＆amp; t; 1，并且从第二测量阶段的接收信号计算方位正弦值sin＆amp; 然后，雷达装置根据方位正弦值sin＆amp; thetas计算相对速度V; 1，方位正弦值sin＆amp; t; 2，切换周期之间的间隔时间差Dgr; t和天线间间距d。

公开(公告)号：US20070040728A1

公开(公告)日：2007-02-22

申请号：US11588242

申请日：2006-10-27

申请人： Tetsu Nishimura ,  Toru Ishii

发明人： Tetsu Nishimura ,  Toru Ishii

IPC分类号： G01S13/42 ,  G01S13/93

CPC分类号： G01S13/345 ,  G01S13/426 ,  G01S13/931 ,  G01S2007/356 ,  G01S2013/9375

摘要： A radar system in which a beat signal is generated by transmitting a transmission signal that is subjected to frequency modulation into a triangular wave and receiving a reflection signal from a target, the beat signal is sampled, and a window function is applied to yield a discrete frequency spectrum. When the window function is applied, a first window function having an amplitude that is gently attenuated from the center of the sampling period toward both sides thereof is applied in a lower frequency band in the frequency spectrum (at close range), and a second window function having an amplitude that is sharply attenuated from the center of the sampling period toward both sides thereof is applied in a higher frequency band in the frequency spectrum (at far range).

摘要翻译： 一种雷达系统，其中通过将进行频率调制的发送信号发送到三角波并从目标接收反射信号来产生拍频信号，对拍子信号进行采样，并应用窗口函数以产生离散 频谱。 当应用窗口功能时，将具有从采样周期的中心向其两侧轻轻衰减的振幅的第一窗口功能施加在频谱（近距离）的较低频带中，并且第二窗口 具有从采样周期的中心向其两侧急剧衰减的幅度的功能被施加在频谱（远程）中的较高频带中。

公开(公告)号：US07898460B2

公开(公告)日：2011-03-01

申请号：US12365365

申请日：2009-02-04

申请人： Tetsu Nishimura ,  Toru Ishii

发明人： Tetsu Nishimura ,  Toru Ishii

IPC分类号： G01S7/35 ,  G01S7/02 ,  G01S13/536 ,  G01S13/93

CPC分类号： G01S3/48 ,  G01S13/34 ,  G01S13/42 ,  G01S13/931 ,  G01S2013/9375

摘要： A radar apparatus includes a transmitting antenna and a receiving antenna that has a plurality of antenna elements, and switches the plurality of antenna elements in synchronization with a modulation period to acquire receiving signals. At this time, the antenna elements are switched in accordance with a combination of a first sub-phase and a second sub-phase in which the antenna elements are sequentially switched in opposite directions to thereby acquire the receiving signals. The radar apparatus calculates an azimuth sine value sin θ1 from the acquired receiving signals of the first sub-phase and calculates an azimuth sine value sin θ2 from the receiving signals of the second sub-phase. Next, the radar apparatus calculates an actual azimuth θ through an averaging process of these azimuth sine values sin θ1 and sin θ2.

摘要翻译： 雷达装置包括具有多个天线元件的发送天线和接收天线，并且与调制周期同步地切换多个天线元件以获取接收信号。 此时，根据第一子相和第二子相的组合来切换天线元件，其中天线元件沿相反的方向顺序切换，从而获得接收信号。 雷达装置从获取的第一子相的接收信号计算方位正弦值sin＆amp; t; 1，并从第二子相的接收信号计算方位正弦值sin＆amp; t; 2。 接下来，雷达装置计算实际的方位角; 通过这些方位正弦值sin＆thetas; 1和sin＆thetas的平均处理; 2。

公开(公告)号：US20090224960A1

公开(公告)日：2009-09-10

申请号：US12428774

申请日：2009-04-23

申请人： Toru Ishii ,  Tetsu Nishimura

发明人： Toru Ishii ,  Tetsu Nishimura

IPC分类号： G01S13/58 ,  H01Q3/00

CPC分类号： G01S13/42 ,  G01S13/343 ,  G01S13/345 ,  G01S13/46 ,  G01S13/583 ,  G01S13/931 ,  G01S2013/9375

摘要： A radar device includes a transmission antenna and a reception antenna having a plurality of antenna elements. The radar device switches the antenna elements in synchronization with a modulation cycle, thereby obtaining a reception signal. At this time, the radar device obtains the reception signal by switching the antenna elements using a first measurement phase and a second measurement phase having different switching cycles as one set. The radar device calculates an azimuth sine value sin θ1 from the reception signal in the first measurement phase and also calculates an azimuth sinusoidal value sin θ2 from the reception signal in the second measurement phase. Then, the radar device calculates a relative velocity V from the azimuth sine value sin θ1, the azimuth sine value sin θ2, an interval time difference Δt between switching cycles, and an inter-antenna element spacing d.

摘要翻译： 雷达装置包括发射天线和具有多个天线元件的接收天线。 雷达装置与调制周期同步地切换天线元件，从而获得接收信号。 此时，雷达装置通过使用具有不同开关周期的第一测量相位和第二测量相位作为一组来切换天线元件来获得接收信号。 雷达装置从第一测量阶段的接收信号计算方位正弦值sinθ1，并且还从第二测量阶段的接收信号计算方位角正弦值sinθ2。 然后，雷达装置从方位正弦值sinθ1，方位正弦值sinθ2，切换周期之间的间隔时间差Deltat和天线间间隔d计算相对速度V.

公开(公告)号：US20090231182A1

公开(公告)日：2009-09-17

申请号：US12365365

申请日：2009-02-04

申请人： Tetsu Nishimura ,  Toru Ishii

发明人： Tetsu Nishimura ,  Toru Ishii

IPC分类号： G01S13/00

CPC分类号： G01S3/48 ,  G01S13/34 ,  G01S13/42 ,  G01S13/931 ,  G01S2013/9375

摘要： A radar apparatus includes a transmitting antenna and a receiving antenna that has a plurality of antenna elements, and switches the plurality of antenna elements in synchronization with a modulation period to acquire receiving signals. At this time, the antenna elements are switched in accordance with a combination of a first sub-phase and a second sub-phase in which the antenna elements are sequentially switched in opposite directions to thereby acquire the receiving signals. The radar apparatus calculates an azimuth sine value sin θ1 from the acquired receiving signals of the first sub-phase and calculates an azimuth sine value sin θ2 from the receiving signals of the second sub-phase. Next, the radar apparatus calculates an actual azimuth θ through an averaging process of these azimuth sine values sin ƒ1 and sin θ2.

摘要翻译： 雷达装置包括具有多个天线元件的发送天线和接收天线，并且与调制周期同步地切换多个天线元件以获取接收信号。 此时，根据第一子相和第二子相的组合来切换天线元件，其中天线元件沿相反的方向顺序切换，从而获得接收信号。 雷达装置根据所获取的第一子相的接收信号计算方位正弦值sinθ1，并根据第二子相的接收信号计算方位正弦值sinθ2。 接下来，雷达装置通过这些方位正弦值sin f1和sinθ2的平均处理来计算实际方位角θ。

公开(公告)号：US07692575B2

公开(公告)日：2010-04-06

申请号：US11877765

申请日：2007-10-24

申请人： Tetsu Nishimura

发明人： Tetsu Nishimura

IPC分类号： G01S13/06 ,  G01S13/32 ,  G01S7/35 ,  G01S13/93 ,  G01S13/00

CPC分类号： G01S13/42 ,  G01S7/03 ,  G01S7/352 ,  G01S13/34 ,  G01S13/931 ,  G01S2007/356 ,  G01S2013/9375

摘要： A radar target detection method in which an azimuth at which a target is located is detected on the basis of reception signals obtained through antenna elements of an array antenna by detecting a change in levels of spectrum peaks in an azimuth spectrum of reception signal intensities, calculating a level of correlation between the level change of each spectrum peak and a directivity pattern of the array antenna in an azimuth range corresponding to the spectrum peak, and determining an azimuth corresponding to one of the spectrum peaks having the highest corresponding correlation level to be the azimuth at which the target is located.

摘要翻译： 基于通过阵列天线的天线元件获得的接收信号，通过检测接收信号强度的方位角频谱中的频谱峰值的变化来检测目标位置的方位角的雷达目标检测方法，计算 每个频谱峰值的电平变化与阵列天线在对应于频谱峰值的方位角范围内的方向性图案之间的相关程度，以及将具有最高对应相关电平的频谱峰值之一的方位角确定为 目标所在的方位角。