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1.发明授权Enhanced vision system for precision navigation in low visibility or global positioning system (GPS) denied conditions 有权增强的视觉系统用于低能见度或全球定位系统（GPS）中的精密导航被拒绝的条件公开(公告)号：US08296056B2
公开(公告)日：2012-10-23
申请号：US12426892
申请日：2009-04-20
IPC分类号： G01C21/30
CPC分类号： G08G5/0086 , G01C23/00 , G01S7/22 , G01S13/86 , G01S13/882 , G01S13/9303 , G01S13/94 , G01S17/023 , G08G5/0021 , G08G5/0052
摘要： A method of generating an image of a volume ahead of an aerial vehicle is provided. The method comprises determining a position of the aerial vehicle and generating a terrain image corresponding to ground features correlated to the position of the aerial vehicle. Obstacle data pertaining to a set of obstacles ahead of the aerial vehicle is determined with a forward looking sensor. An obstacle overlay image is generated and overlain onto the terrain image to generate a composite image.
摘要翻译： 提供了一种在飞行器前面产生体积的图像的方法。 该方法包括确定飞行器的位置并产生对应于与飞行器的位置相关的地面特征的地形图像。 使用前视传感器确定与飞行器前方的一组障碍有关的障碍物数据。 生成障碍物叠加图像并覆盖在地形图像上以生成合成图像。
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公开(公告)号：US07911375B2
公开(公告)日：2011-03-22
申请号：US12476682
申请日：2009-06-02
IPC分类号： G01S13/08
CPC分类号： G01C5/005 , G01S13/585 , G01S13/60 , G01S13/70 , G01S13/882
摘要： Systems and methods for Doppler beam sharpening in a radar altimeter are provided. In one embodiment, a method comprises receiving a return signal at a radar altimeter receiver and applying a first gate to the return signal to select at least a first component of the return signal. Spectral analysis is performed on the first component of the return signal to generate a plurality of frequency bins, wherein each frequency bin is centered around a different frequency across a Doppler shift frequency spectrum for the first component of the return signal. The method further comprises tracking the first component of the return signal, selecting a first frequency bin of the plurality of frequency bins based on the Doppler shift frequency of the first component of the return signal, and outputting a portion of the first component of the return signal falling within the first frequency bin for further processing.
摘要翻译： 提供雷达高度计中多普勒波束锐化的系统和方法。 在一个实施例中，一种方法包括在雷达高度计接收器处接收返回信号，并向返回信号施加第一门以选择返回信号的至少第一分量。 对返回信号的第一分量执行频谱分析以产生多个频率仓，其中每个频率仓以用于返回信号的第一分量的多普勒频移频谱为中心。 该方法还包括跟踪返回信号的第一分量，基于返回信号的第一分量的多普勒频移选择多个频率仓的第一频率仓，并输出返回信号的第一分量的一部分 信号落在第一频率仓内，用于进一步处理。
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3.发明申请ENHANCED VISION SYSTEM FOR PRECISION NAVIGATION IN LOW VISIBILITY OR GLOBAL POSITIONING SYSTEM (GPS) DENIED CONDITIONS 有权增强的视觉系统，用于低可视性或全球定位系统（GPS）精密条件下的精确导航公开(公告)号：US20100268458A1
公开(公告)日：2010-10-21
申请号：US12426892
申请日：2009-04-20
CPC分类号： G08G5/0086 , G01C23/00 , G01S7/22 , G01S13/86 , G01S13/882 , G01S13/9303 , G01S13/94 , G01S17/023 , G08G5/0021 , G08G5/0052
摘要： A method of generating an image of a volume ahead of an aerial vehicle is provided. The method comprises determining a position of the aerial vehicle and generating a terrain image corresponding to ground features correlated to the position of the aerial vehicle. Obstacle data pertaining to a set of obstacles ahead of the aerial vehicle is determined with a forward looking sensor. An obstacle overlay image is generated and overlain onto the terrain image to generate a composite image.
摘要翻译： 提供了一种在飞行器前面产生体积的图像的方法。 该方法包括确定飞行器的位置并产生对应于与飞行器的位置相关的地面特征的地形图像。 使用前视传感器确定与飞行器前方的一组障碍有关的障碍物数据。 生成障碍物叠加图像并覆盖在地形图像上以生成合成图像。
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公开(公告)号：US06897804B1
公开(公告)日：2005-05-24
申请号：US10657971
申请日：2003-09-09
IPC分类号： G01S7/285 , G01C21/00 , G01S3/48 , G01S7/292 , G01S13/18 , G01S13/20 , G01S13/28 , G01S13/42 , G01S13/50 , G01S13/524 , G01S13/70 , G01S13/88 , G01S13/94 , G01S13/08
CPC分类号： G01S7/292 , G01C21/005 , G01S3/48 , G01S13/18 , G01S13/20 , G01S13/288 , G01S13/42 , G01S13/524 , G01S13/70 , G01S13/882 , G01S13/94
摘要： A method for calculating a center frequency and a bandwidth for a radar doppler filter is herein described. The center frequency and bandwidth are calculated to provide radar performance over varying terrain and aircraft altitude, pitch, and roll. The method includes receiving an antenna mounting angle, a slant range, and velocity vectors in body coordinates, calculating a range swath doppler velocity, a track and phase swath bandwidth, and a phase swath doppler velocity. The method continues by calculating a range swath center frequency based on the range swath doppler velocity, calculating a phase swath center frequency based on the phase swath doppler velocity, and calculating a level and verify swath bandwidth based upon the track and phase swath bandwidth.
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公开(公告)号：US06950056B2
公开(公告)日：2005-09-27
申请号：US10144745
申请日：2002-05-13
IPC分类号： G01S7/285 , G01C21/00 , G01S3/48 , G01S7/292 , G01S13/18 , G01S13/20 , G01S13/28 , G01S13/42 , G01S13/50 , G01S13/524 , G01S13/70 , G01S13/88 , G01S13/94 , G01S7/40
CPC分类号： G01S7/292 , G01C21/005 , G01S3/48 , G01S13/18 , G01S13/20 , G01S13/288 , G01S13/42 , G01S13/524 , G01S13/70 , G01S13/882 , G01S13/94
摘要： A method for calculating a center frequency and a bandwidth for a radar doppler filter is herein described. The center frequency and bandwidth are calculated to provide radar performance over varying terrain and aircraft altitude, pitch, and roll. The method includes receiving an antenna mounting angle, a slant range, and velocity vectors in body coordinates, calculating a range swath doppler velocity, a track and phase swath bandwidth, and a phase swath doppler velocity. The method continues by calculating a range swath center frequency based on the range swath doppler velocity, calculating a phase swath center frequency based on the phase swath doppler velocity, and calculating a level and verify swath bandwidth based upon the track and phase swath bandwidth.
摘要翻译： 这里描述用于计算雷达多普勒滤波器的中心频率和带宽的方法。 计算中心频率和带宽，以提供不同地形和飞机高度，俯仰和滚动的雷达性能。 该方法包括接收天体安装角度，倾斜范围和体坐标中的速度矢量，计算范围幅宽多普勒速度，轨道和相位带宽以及相位幅宽多普勒速度。 该方法通过基于范围幅宽多普勒速度计算范围幅中心频率，基于相位幅多普勒速度计算相位中心频率，以及基于轨道和相位带宽来计算电平和验证频带带宽。
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公开(公告)号：US06738563B1
公开(公告)日：2004-05-18
申请号：US10459201
申请日：2003-06-11
IPC分类号： G01S740
CPC分类号： G01S13/524 , G01S3/48 , G01S7/292 , G01S7/4004 , G01S13/18 , G01S13/70 , G01S13/882 , G01S13/94
摘要： A method for reducing effects of terrain return fading due to summation of out of phase radar returns in determining locations of radar targets is described. The method comprises determining an interferometric angle, &PHgr;, to a radar target based on at least one radar return and filtering the interferometric angle, &PHgr;, by adjusting an effect of terrain features contributing to the interferometric angle, &PHgr;, proportionally to a degree of radar return fading resulting from the terrain features of the radar targets. A corrected interferometric angle, &PHgr;out., is then provided, based at least in part on the filtering.
摘要翻译： 描述了一种在确定雷达目标位置时，减少相位雷达回波相加的地形返回衰落影响的方法。 该方法包括：通过基于至少一个雷达返回来确定对雷达目标的干涉角度Phi，并且通过调整对干涉角度Phi的地形特征的影响，并将其与雷达的比例成比例地对干涉角Phi进行滤波 由雷达目标的地形特征返回衰落。 然后，至少部分地基于滤波来提供经校正的干涉角度Phiout。
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公开(公告)号：US20100302088A1
公开(公告)日：2010-12-02
申请号：US12476682
申请日：2009-06-02
IPC分类号： G01S13/08
CPC分类号： G01C5/005 , G01S13/585 , G01S13/60 , G01S13/70 , G01S13/882
摘要： Systems and methods for Doppler beam sharpening in a radar altimeter are provided. In one embodiment, a method comprises receiving a return signal at a radar altimeter receiver and applying a first gate to the return signal to select at least a first component of the return signal. Spectral analysis is performed on the first component of the return signal to generate a plurality of frequency bins, wherein each frequency bin is centered around a different frequency across a Doppler shift frequency spectrum for the first component of the return signal. The method further comprises tracking the first component of the return signal, selecting a first frequency bin of the plurality of frequency bins based on the Doppler shift frequency of the first component of the return signal, and outputting a portion of the first component of the return signal falling within the first frequency bin for further processing.
摘要翻译： 提供雷达高度计中多普勒波束锐化的系统和方法。 在一个实施例中，一种方法包括在雷达高度计接收器处接收返回信号，并向返回信号施加第一门以选择返回信号的至少第一分量。 对返回信号的第一分量执行频谱分析以产生多个频率仓，其中每个频率仓以用于返回信号的第一分量的多普勒频移频谱为中心。 该方法还包括跟踪返回信号的第一分量，基于返回信号的第一分量的多普勒频移选择多个频率仓的第一频率仓，并输出返回信号的第一分量的一部分 信号落在第一频率仓内，用于进一步处理。
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公开(公告)号：US06980153B2
公开(公告)日：2005-12-27
申请号：US10847510
申请日：2004-05-17
CPC分类号： G01S13/953 , G01C5/00 , G01S13/18 , G01S13/882 , Y02A90/18
摘要： A radar altimeter for vehicles that operate with a load suspended underneath is described. The radar altimeter includes a transmitter configured to transmit radar signals toward the ground, a receiver configured to receive reflected radar signals from the ground and from the suspended load, and at least one altitude processing channel configured to receive signals from the receiver. The radar altimeter also includes a load profile channel configured to receive signals from the receiver. The load profile channel limits an altitude processing sensitivity of the radar altimeter between the radar altimeter and the suspended load to reduce a likelihood that the radar altimeter will process signals reflected by the suspended load.
摘要翻译： 描述了用于悬挂在下面的负载操作的车辆的雷达高度计。 所述雷达高度计包括被配置为将雷达信号发射到地面的发射机，被配置为从所述地面和所述悬挂载荷接收反射的雷达信号的接收机以及被配置为从所述接收机接收信号的至少一个高度处理信道。 雷达高度计还包括配置为从接收机接收信号的负载分布信道。 负载曲线通道限制雷达高度计与悬挂负载之间的雷达高度计的高度处理灵敏度，以降低雷达高度计将处理由悬挂载荷反射的信号的可能性。
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