公开(公告)号：US20090051584A1

公开(公告)日：2009-02-26

申请号：US11791065

申请日：2004-11-26

Applicant: Hans Hellsten

Inventor： Hans Hellsten

IPC: G01S13/90

CPC classification number: H01Q3/2611 ,  G01S7/2813 ,  G01S13/0209 ,  G01S13/90

Abstract: A method of for processing signals in a radar system is shown comprising an antenna system having at least two antenna elements, a beam forming arrangement (ABF_RX, ABF_TX) for selectively steering the directivity of the antenna system in a given selected direction, the directivity of the antenna system having a main lobe in the selected direction and a back lobe (BL) in another direction and of a lower magnitude than the main lobe. By utilizing various scale and subtract processing both noise levels and ghost signals can be considerably reduced. A SAR radar apparatus has moreover been shown.

Abstract translation: 一种用于在雷达系统中处理信号的方法被示出为包括具有至少两个天线元件的天线系统，用于选择性地在给定选定方向上转向天线系统的方向性的波束形成装置（ABF_RX，ABF_TX），方向性 所述天线系统具有沿所选方向的主瓣和在另一方向上的后瓣（BL），并且具有比主瓣更低的幅度。 通过利用各种尺度和减法处理，可以显着地减少噪声电平和重影信号。 此外还展示了一种SAR雷达装置。

公开(公告)号：US20080246647A1

公开(公告)日：2008-10-09

申请号：US12028301

申请日：2008-02-08

Applicant: Hans Hellsten

Inventor： Hans Hellsten

IPC: G01S13/90

CPC classification number: G01S13/9035 ,  G01S7/025 ,  G01S13/003 ,  G01S13/885

Abstract: The present invention can be summarized by use of a diffraction limited SAR giving large integration angle and a short depth of field which gives that energy from underground targets is focused independently at different depths to enable 3d imaging. The radar device according to the invention should be implemented by considering the following parameters: Choice of the appropriate illumination geometry, i.e. elevation angle θ, and the appropriate use of low frequency diffraction limited SAR processing to obtain 3D imaging, and the choice of an appropriately low radar frequency.

Abstract translation: 本发明可以通过使用具有大的积分角和短景深的衍射极限SAR来进行总结，这使得来自地下目标的能量独立地聚焦在不同深度以实现3D成像。 应通过考虑以下参数来实现根据本发明的雷达装置：选择适当的照明几何，即仰角θ，以及适当使用低频衍射限制SAR处理以获得3D成像，以及适当地选择 低雷达频率。

公开(公告)号：US06850186B2

公开(公告)日：2005-02-01

申请号：US10476493

申请日：2002-05-08

Applicant: Hans Hellsten

Inventor： Hans Hellsten

IPC: G01S7/00 ,  G01S7/28 ,  G01S13/00 ,  G01S13/87 ,  G01S13/42 ,  G01S7/292 ,  G01S13/50

CPC classification number: G01S13/878 ,  G01S7/003 ,  G01S7/2813 ,  G01S13/003

Abstract: The present invention relates to a system for using signals scattered by targets to determine position and velocity for each of the targets and comprises a set of transmitters and receivers of electromagnetic or acoustic signals, said transmitters and receivers dispersed to known points. Each pair of transmitter and receiver, monostatic or bistatic, is named a measuring facility. The ranges of the transmitters are chosen so that a target at an arbitrary point within the position space can be measured via scattering in the target by at least four measuring facilities. For each measuring facility, target detection occurs with constant false alarm rate in the form of probabilities over resolution cells with regards to range and Doppler velocity and conceivable targets are placed in a 2-dimensional linear space belonging to the measuring facility. The 3-dimensional positions and 3-dimensional Doppler velocities are represented as a 6-dimensional linear position and velocity space subdivided into resolution cells with the same resolution of range and Doppler velocity that is found at the measuring facilities. For each intersection representing detections at at least four measuring facilities the probability is calculated that the intersection is a false alarm emanating intersections between subsets from different targets and when the probability falls below a predefined value, it is given that the intersection contains at least one target. The target positions and target velocities are extracted in this way.”

Abstract translation: 本发明涉及一种使用由目标散射的信号来确定每个目标的位置和速度的系统，并且包括一组电磁或声信号的发射机和接收机，所述发射机和接收机分散到已知的点。 每对发射器和接收器，单稳态或双稳态，都被称为测量设备。 选择发射机的范围，使得可以通过至少四个测量设备在目标中散射来测量位置空间内的任意点处的目标。 对于每个测量设备，目标检测以关于范围和多普勒速度的分辨率单元上的概率的形式具有恒定的误报率，并且将可想到的目标放置在属于测量设备的二维线性空间中。 3维位置和3维多普勒速度表示为6维线性位置和速度空间，细分为具有与测量设施相同的范围和多普勒速度分辨率的分辨率单元。 对于表示在至少四个测量设备上的检测的每个交叉点，计算概率是该交点是发出来自不同目标的子集之间的交集的虚假警报，并且当概率低于预定义值时，给出该交集包含至少一个目标 。 以这种方式提取目标位置和目标速度。

公开(公告)号：US06518914B1

公开(公告)日：2003-02-11

申请号：US09703621

申请日：2000-11-02

Applicant: Mats Peterson ,  Hans Hellsten ,  Lars Ulander

Inventor： Mats Peterson ,  Hans Hellsten ,  Lars Ulander

IPC: G01S1390

CPC classification number: G01S13/5244 ,  G01S13/9029 ,  G01S13/9035

Abstract: A Synthetic Aperture Radar (SAR) system and method capable of detecting moving targets which includes a platform that moves over a number of objects, such as a ground surface, and supports radar equipment which reproduces the objects by means of a fast backprojection synthetic aperture technique via at least two antennas without requirement as to directivity or fractional bandwidth. The imaging process is divided into three steps which are carried out in a determined order, the steps and the order being formation of sub-aperture beams at one speed, performing clutter suppression, and detection of moving targets.

Abstract translation: 一种能够检测移动目标的合成孔径雷达（SAR）系统和方法，其包括在多个物体（例如地面）上移动的平台，并且支持通过快速反投影合成孔径技术再现物体的雷达设备 通过至少两个天线，不需要方向性或分数带宽。 成像过程分为三个步骤：以确定的顺序进行，步骤和顺序是以一个速度形成子孔径光束，执行杂波抑制和移动目标的检测。

公开(公告)号：US06373426B1

公开(公告)日：2002-04-16

申请号：US08258281

申请日：1994-06-14

Applicant: Hans Hellsten

Inventor： Hans Hellsten

IPC: G01S1372

CPC classification number: G01S7/2923 ,  G01S13/0209 ,  G01S13/87 ,  G01S13/90 ,  G01S2013/0227

Abstract: The invention relates to a radar station placed on the surface of the earth, and to a radar system comprising at least two such radar stations. The signal-processing equipment of the radar stations is adapted, at each point of time, to calculate probabilities of target positions and radial target velocity in relation to each individual radar station, based on the signals emitted and received by this station. These calculated values are associated over time, giving cumulative probability measures for target positions and radial velocities in relation to each individual radar station. By providing a system of at least two radar stations, it is possible to calculate the position of a target by associating target positions, such as they are perceived by the different radar stations, with each other by an association of characteristic movements of the target. This is done without having to synchronize the stations. If two stations are used, the target can be located in two dimensions; if at least three stations are used, it can be located in all three dimensions of space.

Abstract translation: 本发明涉及放置在地球表面上的雷达站以及包括至少两个这样的雷达站的雷达系统。雷达站的信号处理设备在每个时间点都适应于计算概率 根据本台发射和接收的信号，与每个单独的雷达站相关的目标位置和径向目标速度。 这些计算值随时间相关联，给出与每个单独的雷达站相关的目标位置和径向速度的累积概率测量。通过提供至少两个雷达站的系统，可以通过将目标相关联来计算目标的位置 诸如他们被不同的雷达站感知到的位置，彼此通过目标的特征运动的关联。 这样做不需要同步站。 如果使用两个站，则目标可以位于两个维度上; 如果使用至少三个站，则可以位于空间的所有三维空间中。

公开(公告)号：US5488373A

公开(公告)日：1996-01-30

申请号：US122482

申请日：1993-09-27

Applicant: Hans Hellsten

Inventor： Hans Hellsten

IPC: G01S13/90

CPC classification number: G01S13/9011

Abstract: A signal processing apparatus for use in SAR radar. The signal processing apparatus uses a new method of processing SAR images, primarily for wide band SAR. The new method is based on the numerical unfolding of differential equations along the flight path. The method makes motion compensation possible and can be used along a curved flight path and irrespective of the acceleration of the aircraft. Moreover, the method makes real time processing possible.

Abstract translation: PCT No.PCT / SE92 / 00184 Sec。 371日期：1993年9月27日 102（e）1993年9月27日PCT 1993年3月23日PCT公布。 出版物WO92 / 16856 日期：1992年10月1日。一种用于SAR雷达的信号处理装置。 信号处理装置使用一种新的SAR图像处理方法，主要用于宽带SAR。 新方法基于沿着飞行路径的微分方程的数值展开。 该方法使运动补偿成为可能，并且可以沿着弯曲的飞行路径使用，而不考虑飞行器的加速度。 此外，该方法使得实时处理成为可能。