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1.发明授权公开(公告)号：US07728756B2
公开(公告)日：2010-06-01
申请号：US11894069
申请日：2007-08-20
CPC分类号： G01S13/9035 , G01S2013/9082
摘要： A hovering helicopter has a radar transmitter/receiver for transmitting radar pulses for illuminating a target for SAR imaging, and rotor blades for generating lift. Radar reflectors are on the rotor blades. The radar reflectors are oriented to reflect the radar pulses from the transmitter to the target as the rotor blades rotate. The radar pulses reflected by the moving reflector from the transmitter are timed to generate the synthetic aperture image using radar returns from the target. The receiver also receives blade returns directly reflected from the moving reflectors attached to the lift rotor blades. The receiver analyzes the blade returns to extract motion details of the reflectors and uses the motion details for motion compensation of target returns for SAR imaging.
摘要翻译： 悬停的直升机具有雷达发射器/接收器，用于发射用于照射SAR成像目标的雷达脉冲，以及用于产生电梯的转子叶片。 雷达反射器位于转子叶片上。 当转子叶片旋转时，雷达反射器被定向以将发射器的雷达脉冲反射到目标。 来自发射机的移动反射器反射的雷达脉冲被定时以使用来自目标的雷达返回产生合成孔径图像。 接收器还接收从附接到提升转子叶片的运动反射器直接反射的叶片返回。 接收机分析刀片返回以提取反射器的运动细节，并使用运动细节进行SAR成像的目标返回的运动补偿。
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公开(公告)号：US20090237640A1
公开(公告)日：2009-09-24
申请号：US12077476
申请日：2008-03-19
IPC分类号： G01C3/00
CPC分类号： G01S7/4811 , G01S7/4816 , G01S7/497 , G01S17/87 , G01S17/89
摘要： A LADAR system for coherently imaging a target within a volume has a modulated laser transmitter at a frequency and a receiver. The receiver has a plurality of lenses, each with its own detector. Each detector is supplied by a centrally located local oscillator tuned to the frequency. The paths from the local oscillator to each detector, as well as the delay within each lens/detector combination are measured during a calibration. A calibrating reflector reflects a test signal during the calibration at many frequencies, temperatures and accelerations. Measurements of paths and delays obtained during the calibration are stored, and used to phase compensate subsequent target reflections for coherent processing.
摘要翻译： 用于在体内相干地成像目标的LADAR系统具有在频率和接收器处的调制的激光发射机。 接收器具有多个透镜，每个具有其自身的检测器。 每个检测器由调谐到频率的中心位置的本地振荡器提供。 在校准期间测量从本地振荡器到每个检测器的路径以及每个透镜/检测器组合内的延迟。 校准反射器在许多频率，温度和加速度的校准期间反映测试信号。 在校准期间获得的路径和延迟的测量被存储，并用于相位补偿后续的目标反射用于相干处理。
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3.发明申请公开(公告)号：US20090051585A1
公开(公告)日：2009-02-26
申请号：US11894069
申请日：2007-08-20
CPC分类号： G01S13/9035 , G01S2013/9082
摘要： A hovering helicopter has a radar transmitter/receiver for transmitting radar pulses for illuminating a target for SAR imaging, and rotor blades for generating lift. Radar reflectors are on the rotor blades. The radar reflectors are oriented to reflect the radar pulses from the transmitter to the target as the rotor blades rotate. The radar pulses reflected by the moving reflector from the transmitter are timed to generate the synthetic aperture image using radar returns from the target. The receiver also receives blade returns directly reflected from the moving reflectors attached to the lift rotor blades. The receiver analyzes the blade returns to extract motion details of the reflectors and uses the motion details for motion compensation of target returns for SAR imaging.
摘要翻译： 悬停的直升机具有雷达发射器/接收器，用于发射用于照射SAR成像目标的雷达脉冲，以及用于产生电梯的转子叶片。 雷达反射器位于转子叶片上。 当转子叶片旋转时，雷达反射器被定向以将发射器的雷达脉冲反射到目标。 来自发射机的移动反射器反射的雷达脉冲被定时以使用来自目标的雷达返回产生合成孔径图像。 接收器还接收从附接到提升转子叶片的运动反射器直接反射的叶片返回。 接收机分析刀片返回以提取反射器的运动细节，并使用运动细节进行SAR成像的目标返回的运动补偿。
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公开(公告)号：US07821619B2
公开(公告)日：2010-10-26
申请号：US12077476
申请日：2008-03-19
IPC分类号： G01C3/08
CPC分类号： G01S7/4811 , G01S7/4816 , G01S7/497 , G01S17/87 , G01S17/89
摘要： A LADAR system for coherently imaging a target within a volume has a modulated laser transmitter at a frequency and a receiver. The receiver has a plurality of lenses, each with its own detector. Each detector is supplied by a centrally located local oscillator tuned to the frequency. The paths from the local oscillator to each detector, as well as the delay within each lens/detector combination are measured during a calibration. A calibrating reflector reflects a test signal during the calibration at many frequencies, temperatures and accelerations. Measurements of paths and delays obtained during the calibration are stored, and used to phase compensate subsequent target reflections for coherent processing.
摘要翻译： 用于在体内相干地成像目标的LADAR系统具有在频率和接收器处的调制的激光发射机。 接收器具有多个透镜，每个具有其自身的检测器。 每个检测器由调谐到频率的中心位置的本地振荡器提供。 在校准期间测量从本地振荡器到每个检测器的路径以及每个透镜/检测器组合内的延迟。 校准反射器在许多频率，温度和加速度的校准期间反映测试信号。 在校准期间获得的路径和延迟的测量被存储，并用于相位补偿后续的目标反射用于相干处理。
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公开(公告)号：US07121502B2
公开(公告)日：2006-10-17
申请号：US11043543
申请日：2005-01-26
CPC分类号： F41G7/303 , F41G7/308 , G01S13/003 , G01S13/726 , G01S13/878
摘要： A guidance system for guiding each of several projectiles toward a moving target has a platform having a radar system for illuminating the target with a radar signal. Each projectile has a receiver for receiving the radar signal reflected from the target, a transponder for replying to Global Positioning System (GPS) like timing signals from several timing signal sources, and a data link transceiver for establishing a bidirectional data link to the platform. The data link carries the measured frequency shift of the radar signal reflected from the target as measured by the projectile. A computer on the platform computes a relative position of each projectile with respect to the target from tracking the moving target using the radar system and the reply signal from the transponder on each projectile. The data link sends guidance commands from the platform to each projectile to guide the projectile to the target.
摘要翻译： 用于将多个射弹中的每一个朝向移动目标引导的引导系统具有用雷达信号照射目标的雷达系统的平台。 每个抛射体具有用于接收从目标反射的雷达信号的接收器，用于响应于来自多个定时信号源的定时信号的全球定位系统（GPS）的应答器，以及用于建立到平台的双向数据链路的数据链路收发器。 数据链路携带由射弹测量的目标反射的雷达信号的测量频移。 平台上的计算机使用雷达系统计算每个射弹相对于目标的相对位置，并使用每个射弹的应答器的回复信号。 数据链接从平台向每个抛射体发送指导命令，以将射弹引导到目标。
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公开(公告)号：US07092596B2
公开(公告)日：2006-08-15
申请号：US10126569
申请日：2002-04-19
CPC分类号： G01S7/282 , G02B6/2861 , H01Q3/2676 , H01Q3/2682
摘要： A recirculating delay line that includes an optical delay circuit generates repetitions of an input signal waveform that is of limited time duration.
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公开(公告)号：US07061443B2
公开(公告)日：2006-06-13
申请号：US10815274
申请日：2004-04-01
IPC分类号： H01Q13/10
CPC分类号： H01Q21/005
摘要： A millimeter wave (MMW) antenna array includes a continuous transverse stub (CTS) radiating aperture comprising a set of spaced continuous transverse stubs, each having a longitudinal extent. A series feed system is coupled to an excitation source for exciting the stubs with MMW electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which can be scanned over a beam scan range by changing the excitation frequency.
摘要翻译： 毫米波（MMW）天线阵列包括连续横向短截线（CTS）辐射孔，其包括一组间隔开的连续横向短截线，每个具有纵向延伸。 串联馈送系统耦合到激励源，用于以沿着短截线的纵向范围具有线性相位前进的MMW电磁能激发短截线，以产生可以通过改变激励频率在波束扫描范围上扫描的阵列波束。
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公开(公告)号：US07965226B2
公开(公告)日：2011-06-21
申请号：US12416064
申请日：2009-03-31
IPC分类号： G01S13/00
CPC分类号： G01S13/426 , G01S7/28 , G01S13/22 , G01S2013/0245 , G01S2013/0272
摘要： A system and method for concurrently operating a plurality of agile beam radar modes by pulse-to-pulse interleaving groups of the radar modes. Radar modes are grouped, each radar mode being allocated a certain amount of time for operation and a suitable pulse repetition frequency to improve or optimize the duty cycle of the antenna while concurrently operating the plurality of modes. Priorities may be assigned to groups or to individual radar modes within each group. In some embodiments, TDM communications are further interleaved within the radar modes to enhance the operation of the radar antenna.
摘要翻译： 一种用于通过雷达模式的脉冲到脉冲交织组同时操作多个敏捷波束雷达模式的系统和方法。 雷达模式被分组，每个雷达模式被分配一定量的操作时间和合适的脉冲重复频率，以在同时操作多个模式的同时改善或优化天线的占空比。 优先级可以分配给每个组内的组或各个雷达模式。 在一些实施例中，TDM通信在雷达模式内被进一步交织以增强雷达天线的操作。
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公开(公告)号：US07333049B2
公开(公告)日：2008-02-19
申请号：US11352072
申请日：2006-02-10
IPC分类号： G01S13/52
CPC分类号： G01S13/003 , G01S13/52
摘要： A radar transmitter is at a first location on a moving platform and illuminates a target with a sequence of frequency modulated radar pulses. The frequency modulated pulses are linear frequency modulated, i.e. chirped. The target reflects the frequency modulated radar pulses. A receiving antenna has a difference pattern null and receives the reflections from the target as a main scatterer and an ambiguity of the main scatterer. The sequence of pulses change the start of their frequency modulation (chirp) over a SAR array. The change in start frequency from pulse to pulse allows to shift the range ambiguity so as to align with the delay/Doppler difference pattern null of the antenna. Thus, both the main scatterer as well as the shifted range ambiguity are on the difference pattern null, facilitating their cancellation.
摘要翻译： 雷达发射器位于移动平台上的第一位置，并用一系列频率调制的雷达脉冲照射目标。 频率调制脉冲是线性调频的，即啁啾的。 目标反映了调频雷达脉冲。 接收天线具有差模式零，并且接收来自目标的反射作为主散射体和主散射体的模糊性。 脉冲序列通过SAR阵列改变其频率调制（啁啾）的开始。 从脉冲到脉冲的起始频率的变化允许移动范围模糊度，以便与天线的延迟/多普勒差分图形零点对齐。 因此，主要的散射体以及移动的范围模糊度都在差异模式为零，便于取消。
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公开(公告)号：US07202812B2
公开(公告)日：2007-04-10
申请号：US11144131
申请日：2005-06-03
CPC分类号： H04B1/525 , G01S7/038 , G01S7/352 , G01S13/32 , G01S2007/356
摘要： A radar system (500) radiates a radar transmit signal, has a radar signal receiver (503) and a canceller (505) for canceling leakage of the transmit signal into the radar signal receiver (503). The canceller (505) comprises a digital waveform generator (528) for generating a first digital signal converted to an analog waveform. The analog waveform is amplified after a fixed delay (534) to generate a first cancellation signal input into a circulator (504). The circulator combines the first cancellation signal with the leakage to generate a first corrected signal. A summer (507) combines the first corrected signal from the circulator with a second cancellation signal to generate a second corrected signal. The second cancellation signal is generated by a digital cancellation filter (526). The digital cancellation filter (526) has as an input the first digital signal from the digital waveform generator (528). The digital cancellation filter (526) is controlled using weight adjustments computed by an adaptive weight processor (518). The adaptive weight processor (518) samples the second corrected signal and computes the weight adjustments to optimize the second cancellation signal.
摘要翻译： 雷达系统（500）辐射雷达发射信号，具有用于消除发射信号泄漏到雷达信号接收机（503）中的雷达信号接收机（503）和消除器（505）。 消除器（505）包括用于产生转换为模拟波形的第一数字信号的数字波形发生器（528）。 模拟波形在固定延迟（534）之后被放大，以产生输入循环器（504）的第一消除信号。 循环器将第一抵消信号与泄漏组合以产生第一校正信号。 夏季（507）将来自循环器的第一校正信号与第二消除信号组合以产生第二校正信号。 第二消除信号由数字消除滤波器（526）产生。 数字消除滤波器（526）具有来自数字波形发生器（528）的第一数字信号作为输入。 使用由自适应加权处理器（518）计算的权重调整来控制数字消除滤波器（526）。 自适应加权处理器（518）对第二校正信号进行采样并计算加权调整以优化第二消除信号。
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