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    Multi-frequency automatic radar system
    82.
    发明授权
    Multi-frequency automatic radar system 失效
    多频汽车雷达系统

    公开(公告)号：US5285207A

    公开(公告)日：1994-02-08

    申请号：US20600

    申请日：1993-02-22

    Applicant: Jimmie Asbury ,  John W. Davis

    Inventor： Jimmie Asbury ,  John W. Davis

    IPC: G01S7/02 ,  G01S13/24 ,  G01S13/32 ,  G01S13/52 ,  G01S13/53 ,  G01S13/534 ,  G01S13/536 ,  G01S13/56 ,  G01S13/58 ,  G01S13/70 ,  G01S13/72 ,  G01S13/86 ,  G01S13/93 ,  G01S13/62

    CPC classification number: G01S13/52 ,  G01S13/24 ,  G01S13/53 ,  G01S13/534 ,  G01S13/56 ,  G01S13/70 ,  G01S13/86 ,  G01S13/931 ,  G01S13/32 ,  G01S13/536 ,  G01S13/58 ,  G01S13/726 ,  G01S2013/9339 ,  G01S2013/9353 ,  G01S2013/9357 ,  G01S2013/936

    Abstract: A Doppler control circuit for a CW or pulse Doppler radar system for monitoring not only the phase shift between echo signals from several targets but also the amplitude difference between several targets and to further tune the radar to a particular target among one or more targets from which echo signals return. The control circuit can be used in state of the art CW or pulse Doppler type radar systems. In a further system, a continuously generated radar signal is repeatedly transmitted at different frequencies in time division fashion to define a succession of transmit and receive frames. The receive frames are divided into a plurality of time interval windows with selected windows being used to detect received signals at the different frequencies. The remaining windows can be used for subsystems of the radar system. The rate of phase shift of received signals at a reference frequency is used to determine closing rate, (positive or negative) while the phase shift difference between received signals at two frequencies is used to determine range and target direction. In yet a further system, a special circuit is provided for conditioning selected portions of the Doppler frequency spectrum to attenuate or de-emphasize portions of the echo signal corresponding to selected targets in the radar system environment, such as rain or stationary wayside objects, in order to give such echo signals less weight in determining roadway hazards.

    Abstract translation: 一种用于CW或脉冲多普勒雷达系统的多普勒控制电路，用于不仅监测来自若干目标的回波信号之间的相移，而且还监测几个目标之间的振幅差异，并进一步将雷达调谐到一个或多个目标中的特定目标， 回波信号返回。 控制电路可用于现有技术的CW或脉冲多普勒型雷达系统。 在另一系统中，连续生成的雷达信号以不同频率以时分方式重复发送，以定义连续的发射和接收帧。 接收帧被分成多个时间间隔窗口，其中所选择的窗口用于检测在不同频率的接收信号。 其余窗口可用于雷达系统的子系统。 使用参考频率的接收信号的相移速率来确定闭合速率（正或负），而使用两个频率的接收信号之间的相移差来确定范围和目标方向。 在又一系统中，提供了专门的电路来调节多普勒频谱的选定部分以衰减或去强调对应于雷达系统环境中的选定目标的回波信号的部分，例如雨或固定路边物体， 为了在确定道路危险时给予这种回波信号较少的重量。

    Binaural Doppler radar target detector
    83.
    发明授权
    Binaural Doppler radar target detector 失效
    双耳多普勒雷达目​​标探测器

    公开(公告)号：US4692763A

    公开(公告)日：1987-09-08

    申请号：US812601

    申请日：1985-12-23

    Applicant: Ralph C. Gregg, Jr.

    Inventor： Ralph C. Gregg, Jr.

    IPC: G01S13/536 ,  G01S13/56 ,  G01S13/62

    CPC classification number: G01S13/62 ,  G01S13/536 ,  G01S13/56

    Abstract: Audio frequency Doppler signals output from a radar are encoded and presented to left and right speakers of a headset. The Doppler signals are encoded so that the auditory effect produced by sounds emanating from the left and right speakers are perceived by an operator as originating from a particular location in space. In a preferred embodiment in-phase and quadrature Doppler signal outputs from a coherent radar couple through an optional phase shift to the left and right speakers. Sounds having phase differences dependent upon whether a target is approaching or receding result. The operator hears these sounds and perceives the sounds as being located toward the left or right.

    Abstract translation: 从雷达输出的音频多普勒信号被编码并呈现给耳机的左右扬声器。 多普勒信号被编码，使得由左和右扬声器发出的声音产生的听觉效果被操作者感知为来自空间中的特定位置。 在优选实施例中，来自相干雷达耦合的相位和正交多普勒信号输出通过可选的相移到左右扬声器。 具有取决于目标是否接近或后退的相位差的声音。 操作员听到这些声音，并将声音感知到位于左侧或右侧。

    Moving target indication system
    84.
    发明授权
    Moving target indication system 失效
    移动目标指示系统

    公开(公告)号：US4633253A

    公开(公告)日：1986-12-30

    申请号：US514226

    申请日：1983-07-15

    Applicant: Andrew G. Stove ,  Richard P. Vincent

    Inventor： Andrew G. Stove ,  Richard P. Vincent

    IPC: G01S13/536 ,  G01S13/54 ,  G01S13/34

    CPC classification number: G01S13/536

    Abstract: In order that it should respond satisfactorily to substantially all moving targets within range (without exhibiting "blind speeds") and ignore all stationary targets, a moving target indication system comprises an FM continuous wave radar system in the form of an oscillator (1) the output frequency of which is swept by the output signal of a triangular-wave generator (19). The oscillator output signal is fed to an aerial (3) via a circulator (4) and also to a first input (6) of a mixer (7) a second input (8) of which is supplied with the return signal from the aerial. The respective output waveforms of the mixer occurring for sweeps of the oscillator frequency in the two directions are, in a further circuit (11), subtracted one from the other after effectively time-reversing one of them, and the resulting difference waveform is analyzed in a Fast Fourier Transform calculating circuit (15). The triangular-wave generator (19) may be replaced by a sawtooth-wave generator, in which case the effective time-reversal in the further circuit (11) should be omitted.

    Abstract translation: 为了使其对范围内的所有移动目标（不显示“盲目速度”）满意地响应并忽略所有静止目标，移动目标指示系统包括振荡器形式的FM连续波雷达系统（1）， 其输出频率被三角波发生器（19）的输出信号扫描。 振荡器输出信号通过环行​​器（4）馈送到天线（3），并且还连接到混频器（7）的第一输入端（6），第二输入端（8）被提供有来自天线的返回信号 。 在另一个电路（11）中，在两个方向上振荡器频率的扫描发生的混频器的相应输出波形在有效地反转其中之一之后从另一个中相减，并且将所得到的差分波形分析 快速傅里叶变换计算电路（15）。 三角波发生器（19）可以由锯齿波发生器代替，在这种情况下，应该省略进一步的电路（11）中的有效时间反转。

    Continuous wave radar systems
    85.
    发明授权
    Continuous wave radar systems 失效
    连续波浪雷达系统

    公开(公告)号：US3670327A

    公开(公告)日：1972-06-13

    申请号：US61990456

    申请日：1956-11-01

    Applicant: SUPPLY UK

    Inventor： CLARE JOHN DICKENS ,  MARSH STANLEY BRUCE

    IPC: G01S13/536 ,  G01S9/44

    CPC classification number: G01S13/536

    Abstract: 1. A continuous wave radar system comprising a transmitting channel and a receiving channel, a first heterodying means included in said receiving channel to convert the received signal to an intermediate frequency, a reference signal channel including a second heterodyning means coupled to said transmitting channel for converting a portion of the transmitted signal to an intermediate frequency, phase comparison means coupled to the intermediate frequency outputs of said receiving and said reference channels for producing an output proportional to the phase relationship between the channels, phase adjusting means included in said reference channel and coupled to said phase comparison means for maintaining a fixed phase relationship between channels, amplitude comparison means coupled to the intermediate frequency outputs of said receiving and said reference channels, amplitude adjusting means included in said reference channel and coupled to said amplitude comparison means for maintaining a fixed amplitude relationship between said channels, circuit means for applying a portion of said reference signal to said receiving channel in opposition to cancel the noise component of said received signal, a detector coupled to said receiver channel and to said reference channel to provide an output proportional to the doppler frequency difference between the received signal and the reference signal.

    Abstract translation: 1.一种包括发射信道和接收信道的连续波雷达系统，包括在所述接收信道中的第一外差装置，用于将接收信号转换成中频;参考信号信道，包括耦合到所述发射信道的第二外差装置， 将所发送的信号的一部分转换成中频，相位比较装置，耦合到所述接收和所述参考信道的中频输出，以产生与通道之间的相位关系成比例的输出，包括在所述参考信道中的相位调整装置和 耦合到所述相位比较装置，用于保持信道之间的固定相位关系，耦合到所述接收和所述参考信道的中频输出的幅度比较装置，包括在所述参考信道中的振幅调节装置，并耦合到所述振幅比较装置， 在所述信道之间施加固定的幅度关系，电路装置用于将所述参考信号的一部分施加到所述接收信道，以抵消所述接收信号的噪声分量;耦合到所述接收机信道和所述参考信道的检测器， 输出与接收信号与参考信号之间的多普勒频率差成比例。

    Doppler correlation radar system
    86.
    发明授权
    Doppler correlation radar system 失效
    多普勒相关雷达系统

    公开(公告)号：US3614785A

    公开(公告)日：1971-10-19

    申请号：US3614785D

    申请日：1969-03-28

    Applicant: RCA CORP

    Inventor： KRATZER DALE L

    IPC: G01S7/34 ,  G01S13/32 ,  G01S13/536 ,  G01S13/56 ,  G01S13/64 ,  G01S9/42

    CPC classification number: G01S13/325 ,  G01S7/34 ,  G01S13/536 ,  G01S13/56 ,  G01S13/64

    Abstract: A continuous wave Doppler radar system which is modulated by a repetitive binary code in which the binary value of the bits of one-half the code vary in a pseudo-random manner and the bits of the other half of the code all have the same binary value is utilized to provide two time-multiplexed channels, one of which is an ''''all range'''' channel having a sound output and the other of which is a ''''range bins'''' channel having a visual output. The repetitive code utilized in the ''''all range'''' channel inherently provides this channel with a sensitivity time control (STC) that makes the sensitivity of the channel vary directly with the range to the target. In the ''''range bins'''' channel the Doppler characteristics of a particular target are derived by correlation of the return signal with the delayed portion of the transmitted signal to unambiguously determine the target range.

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