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    Accurate location sonar and radar
    51.
    发明授权
    Accurate location sonar and radar 失效
    准确定位声纳和雷达

    公开(公告)号：US4686532A

    公开(公告)日：1987-08-11

    申请号：US739932

    申请日：1985-05-31

    申请人： Alastair D. McAulay

    发明人： Alastair D. McAulay

    IPC分类号： G01S7/295 ,  G01S13/522 ,  G01S13/89 ,  G01S15/89 ,  G01S7/44

    CPC分类号： G01S15/89 ,  G01S13/522 ,  G01S13/89 ,  G01S7/295

    摘要： A sonar or radar permits primary distributed scatterers that are close to the sonar or radar relative to the array dimension to be rapidly and accurately located and pertinent characteristics to be estimated, such as Doppler and complex scattering strength. The region viewed is partitioned in annuli instead of in angular pie shaped slices as is normally the case for conventional sonar. This avoids the difficulty with conventional sonar or radar of distinguishing whether a scatterer is in a side lobe or the main beam an dis preferable to conventional sonars or radars in the important case of approaching multiple scatterers, e.g. robotic vehicle sensors or torpedo terminal homing on a target, because near regions may be examined in all directions prior to further regions. Computational speed is achieved by utilizing precomputation and leaving only part of the computation to be performed in real time.

    摘要翻译： 声纳或雷达允许相对于阵列尺寸靠近声纳或雷达的主要分布散射体被快速且准确地定位并且要估计的相关特性，例如多普勒和复散射强度。 所观察的区域以环形分隔，而不是像通常为常规声纳的情况下的角馅饼状切片。 这避免了在接近多个散射体的重要情况下，常规声纳或雷达难以区分散射体是在旁瓣还是主梁，对于传统的声纳或雷达来说是不利的。 机器人车辆传感器或鱼雷终端在目标上归位，因为在进一步的区域之前可以在所有方向检查近地区。 计算速度是通过利用预先计算来实现的，并且只剩下部分计算被实时执行。

    Pulse doppler radar receiver with a circuit for reducing spurious signals
    52.
    发明授权
    Pulse doppler radar receiver with a circuit for reducing spurious signals 失效
    脉冲多普勒雷达接收机具有减少杂散信号的电路

    公开(公告)号：US4528565A

    公开(公告)日：1985-07-09

    申请号：US363769

    申请日：1982-03-31

    申请人： Rudolf Hauptmann

    发明人： Rudolf Hauptmann

    IPC分类号： G01S13/522 ,  G01S7/28

    CPC分类号： G01S13/522

    摘要： A pulse Doppler radar receiver which continuously monitors successively obtained amplitude values Ao through An with the disrupted amplitude values which deviate by a prescribed value from an interpolation value obtained from adjacent undisturbed amplitude values are determined and are limited to a value obtained from the interpolation value or from the largest or smallest adjacent undisrupted amplitude values and are substituted for the disrupted values. The apparatus includes an interpolation circuit which includes the shift register and limiter with the memory for adjusting the output signal level of the limiter.

    摘要翻译： 确定连续监视连续获得的振幅值Ao至An的脉冲多普勒雷达接收机，其中从相邻未受干扰振幅值获得的内插值偏离规定值的扰动幅度值被限定为从插值值或 从最大或最小相邻的未破坏的幅度值，并代替中断的值。 该装置包括内插电路，其包括移位寄存器和限幅器以及用于调节限幅器的输出信号电平的存储器。

    Passive radar with analogue cancellation of the static component
    54.
    发明授权
    Passive radar with analogue cancellation of the static component 有权

    公开(公告)号：US11086003B2

    公开(公告)日：2021-08-10

    申请号：US16377593

    申请日：2019-04-08

    申请人： COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES

    发明人： Patrick Rosson

    IPC分类号： G01S13/00 ,  G01S7/40 ,  G01S13/46 ,  G01S13/522

    摘要： A passive radar comprises a reception antenna for a signal transmitted by a non-cooperative transmitter, the received signal comprising a static contribution related to propagation of the signal transmitted through a multi-path propagation channel and a dynamic contribution related to propagation of echoes of the transmitted signal from a moving target. The passive radar also comprises a reception chain that includes an analogue-digital converter capable of outputting a digitised signal, a moving target detection unit, a digitised signal processing unit configured to determine an estimation of the static contribution during a calibration phase of the passive radar, a transmission chain that can output an analogue signal representative of the estimation of the static contribution, and a directional coupler configured to output the signal received during the calibration phase of the passive radar to the reception chain.

    Radar system
    58.
    发明授权
    Radar system 有权

    公开(公告)号：US10746865B2

    公开(公告)日：2020-08-18

    申请号：US16074362

    申请日：2016-02-29

    申请人： MITSUBISHI ELECTRIC CORPORATION

    发明人： Satoshi Kageme ,  Teruyuki Hara

    IPC分类号： G01S13/44 ,  G01S7/295 ,  G01S13/00 ,  G01S13/50 ,  G01S13/522 ,  G01S13/87 ,  G01S13/931

    摘要： A frequency domain transforming unit (231-1) performs a transform into a frequency domain in such a way that a Doppler velocity bin is the same for each of different transmission frequencies. A correlation unit (232-1) generates signals based on a velocity and a range after correlation, the signals being separate for each of the transmission frequencies. An integrating unit (233-1) generates band-synthesized signals based on a velocity and a range after correlation. A target candidate detecting unit (241) performs detection of a target candidate on output signals of the integrating unit (233-1) on the basis of signal strength. A target's relative-velocity/relative-range/arrival-angle calculating unit (242) calculates a relative velocity, a relative range, and an arrival angle of the target candidate.

    PASSIVE RADAR WITH ANALOGUE CANCELLATION OF THE STATIC COMPONENT
    59.
    发明申请
    PASSIVE RADAR WITH ANALOGUE CANCELLATION OF THE STATIC COMPONENT 审中-公开

    公开(公告)号：US20190317203A1

    公开(公告)日：2019-10-17

    申请号：US16377593

    申请日：2019-04-08

    申请人： COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES

    发明人： Patrick Rosson

    IPC分类号： G01S13/00 ,  G01S7/40 ,  G01S13/46 ,  G01S13/522

    摘要： A passive radar comprises a reception antenna for a signal transmitted by a non-cooperative transmitter, the received signal comprising a static contribution related to propagation of the signal transmitted through a multi-path propagation channel and a dynamic contribution related to propagation of echoes of the transmitted signal from a moving target. The passive radar also comprises a reception chain that includes an analogue-digital converter capable of outputting a digitised signal, a moving target detection unit, a digitised signal processing unit configured to determine an estimation of the static contribution during a calibration phase of the passive radar, a transmission chain that can output an analogue signal representative of the estimation of the static contribution, and a directional coupler configured to output the signal received during the calibration phase of the passive radar to the reception chain.

    RADAR APPARATUS
    60.
    发明申请
    RADAR APPARATUS 审中-公开

    公开(公告)号：US20170082742A1

    公开(公告)日：2017-03-23

    申请号：US15268352

    申请日：2016-09-16

    申请人： FURUNO ELECTRIC CO., LTD.

    发明人： Takumi FUJIKAWA ,  Yugo KUBOTA

    IPC分类号： G01S13/522 ,  G01S13/89 ,  G01S7/06 ,  G01S7/24

    摘要： A radar apparatus (1) for creating a radar image based on reflection waves caused by radio waves transmitted from an antenna, is provided. The radar apparatus (1) includes a receiver (3) configured to receive the reflection waves of the transmitted radio waves, as reception signals, a suppression processing module (9) configured to suppress levels of reflection signals among the reception signals, each of the reflection signals caused by precipitation, a precipitation reflection visualizing data creating module (15) configured to create data indicating, as a precipitation reflection visualized area (97), an area corresponding to the signals of which levels are suppressed to below a threshold by the suppression processing module (9), and a display image data creating module (16) configured to create display image data indicating on the radar image, the precipitation reflection visualized area (97) created by the precipitation reflection visualizing data creating module (15).