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公开(公告)号：US4649395A
公开(公告)日：1987-03-10
申请号：US601524
申请日：1984-04-18
申请人： Bernard Gellekink , Willem A. Hol
发明人： Bernard Gellekink , Willem A. Hol
摘要： A pulse radar apparatus is provided with a coherent transmitting and receiving unit with N juxtaposed receiving antennas and N receivers for the reception of echo signals and the processing thereof into two orthogonally phase-detected and digitized video signal components i.sub.r and q.sub.r, where r=0, 1, 2, . . . , N-1. A beamformer is provided to derive from these components the orthogonal components I.sub.k and Q.sub.k of the video signal determined jointly by the N receivers in accordance with a receiving beam pattern k corresponding with a specific elevation interval, where l=0, 1, 2, . . . ,N-1. The orthogonal components I.sub.n, Q.sub.n and I.sub.n+1, Q.sub.n+1 supplied through two adjoining beamformer output channels n and n+1, and derived from the video signals P.sub.n, P.sub.n+1 from echo signals of maximum amplitude received from moving targets, are used for determining the deviation (.DELTA..alpha.) of the elevation value .alpha., which elevation value corresponds with the center between the receiving beam patterns n and n+1.
摘要翻译： 脉冲雷达装置设有具有N个并置接收天线和N个接收机的相干发射和接收单元，用于接收回波信号，并将其处理成两个正交相位检测和数字化视频信号分量ir和qr，其中r = 0 ，1，2，。 。 。 ，N-1。 提供波束形成器以从这些分量中导出由N个接收机根据与特定高程间隔对应的接收波束图案k联合确定的视频信号的正交分量Ik和Qk，其中l = 0,1,2。 。 。 ，N-1。 通过两个相邻的波束形成器输出通道n和n + 1提供的正交分量In，Qn和In + 1，Qn + 1，并且从从移动目标接收的最大振幅的回波信号从视频信号Pn，Pn + 1导出， 用于确定仰角值α的偏差（DELTA alpha），该高程值对应于接收波束图案n和n + 1之间的中心。
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公开(公告)号：US5347282A
公开(公告)日：1994-09-13
申请号：US957784
申请日：1992-10-08
CPC分类号： G01S13/5246 , G01S13/343 , G01S7/2927 , G01S7/415
摘要： Apparatus for the observation and identification of helicopters by means of an FM-CW radar apparatus provided with transmitter means (1), antenna means (2) and receiver means (3). Blade flashes caused by the rotor blades are digitized by A/D converter (4) and processed by Fourier analysis means (5) and processor (6) in order to determine the range from a helicopter to the radar apparatus and the rotor symmetry characteristics. These symmetry characteristics, together with the blade flash repetition frequency yield a substantially unambiguous indication of the helicopter type.
摘要翻译： 用于通过设置有发射机装置（1），天线装置（2）和接收装置（3）的FM-CW雷达装置观察和识别直升机的装置。 由转子叶片引起的叶片闪烁由A / D转换器（4）数字化，并由傅立叶分析装置（5）和处理器（6）处理，以确定从直升机到雷达装置的范围和转子对称特性。 这些对称特性与叶片闪光重复频率一起产生直升机类型的基本上明确的指示。
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公开(公告)号：US5049889A
公开(公告)日：1991-09-17
申请号：US292674
申请日：1989-01-03
申请人： Willem A. Hol , Jan Bergman
发明人： Willem A. Hol , Jan Bergman
IPC分类号： G01S13/53 , G01S7/32 , G01S13/22 , G01S13/524
CPC分类号： G01S13/227 , G01S13/5244
摘要： Moving target indication unit provided with a doppler filter bank (1) with n output channels A.sub.i (i=0, 1, 2, . . . , n-1), several threshold circuits (24.i) connected to the output channels, a detection and registration unit (7, 14, 18, 23) provided with means (7, 14, 18) for the determination and registration, per azimuth cell, of a parameter for the amount of clutter in an azimuth cell. The said means are further suitable for determining, based on the output signals of the filter bank (1), k (k.gtoreq.2) parameters per azimuth cell and processing per azimuth cell the combination of k parameters to obtain n threshold values, used to set the n threshold circuits.
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公开(公告)号：US4667200A
公开(公告)日：1987-05-19
申请号：US549943
申请日：1983-11-09
申请人： Bernard Gellekink , Willem A. Hol
发明人： Bernard Gellekink , Willem A. Hol
摘要： A pulse radar apparatus is provided with a coherent transmitting and receiving unit (1) for the transmission of radar pulses, the reception of echo signals, and the conversion of the echo signals into signals of an intermediate frequency f.sub.if, which may be shifted through a Doppler frequency f.sub.d. The echo signals with frequency f.sub.if +f.sub.d are fed to a detector (7) for the coherent phase detection with a frequency f.sub.if +f.sub.c. The detected signals are fed to an analog-to-digital converter (10), which operates at a frequency of approximately 4f.sub.c. The pulse radar apparatus further includes accumulators (12, 13), alternately fed with the output signals of the analog-to-digital converter (10) each time for a given period, after which period the output signals of the accumulators (12, 13) are representative of the orthogonally detected components of the echo signals.
摘要翻译： 脉冲雷达装置设有相干发射和接收单元（1），用于传输雷达脉冲，接收回波信号，以及将回波信号转换成中频15的信号，其可以通过 多普勒频率fd 具有频率为fif + fd的回波信号被馈送到用于相位相位检测的检测器（7），频率为fif + fc。 检测到的信号被馈送到以大约4fc的频率工作的模拟 - 数字转换器（10）。 脉冲雷达装置还包括累积器（12,13），每次在给定时段内交替地馈送模数转换器（10）的输出信号，之后累加器（12,13）的输出信号 ）代表回波信号的正交检测分量。
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公开(公告)号：US4542382A
公开(公告)日：1985-09-17
申请号：US392115
申请日：1982-06-25
申请人： Willem A. Hol
发明人： Willem A. Hol
IPC分类号： G01S7/28 , G01S7/32 , G01S13/52 , G01S13/522 , G01S13/524 , G01S13/528 , G01S13/534 , G01S13/538 , G01S13/54
CPC分类号： G01S13/5248 , G01S13/538
摘要： Search radar apparatus containing an MTI video processing unit provided with: a canceller for generating video signals of moving targets; a zero-velocity filter for generating clutter video signals; a conditional circuit connected to the canceller and the filter for generating per range quant of each radar scan a clutter switching signal if for the rang quant the signal value obtained with filter is greater than the signal value obtained with the canceller; a combination circuit connected to said filter and the conditional circuit for selecting the clutter video signals present with the clutter switching signals and for determining therefrom a temporary clutter level in each clutter cell and each antenna revolution period; and clutter level indication means connected to the combination circuit for determining a standard clutter level per range-azimuth clutter cell of the radar range with the application of clutter video signals.
摘要翻译： 包含MTI视频处理单元的搜索雷达装置，具有：用于产生移动目标的视频信号的消除器; 用于产生杂波视频信号的零速度滤波器; 连接到消除器的条件电路和用于产生每个雷达扫描的每个范围量化的滤波器的杂波切换信号，如果用于滤波量化，则用滤波器获得的信号值大于用消除器获得的信号值; 连接到所述滤波器的组合电路和用于选择与杂波开关信号一起出现的杂波视频信号的条件电路，并用于确定每个杂波小区中的临时杂波电平和每个天线旋转周期; 以及连接到组合电路的杂波电平指示装置，用于利用杂波视频信号来确定雷达范围的每个方位杂波小区的标准杂波电平。
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公开(公告)号：US4524360A
公开(公告)日：1985-06-18
申请号：US344917
申请日：1982-02-02
申请人： Jan Bergman , Pieter Van Genderen , Willem A. Hol
发明人： Jan Bergman , Pieter Van Genderen , Willem A. Hol
摘要： In a pulse radar apparatus target returns are detected, sampled, digitized per range quant and frequency analyzed. The apparatus includes a cell classification unit (5) for deriving from the spectrum range of the target returns a cell classification signal, whose logical values indicate that the target returns within a radar cell are classified, in the first instance, as first trip and multiple trip signals. In a microprocessor (12) the cells, which collectively cover one single target, are combined to form a cluster, while a signal representative of the target covered by the cluster is determined. Furthermore in the microprocessor (12) a cluster classification signal is derived, whose logical values indicate that the target returns within the cluster are classified as first trip and multiple trip signals. The signal representative of the target covered by the cluster is read out if it is derived from target returns classified as first trip echoes.
摘要翻译： 在脉冲雷达装置中，每个范围的量化和频率分析检测，采样，数字化目标返回。 该装置包括用于从目标的频谱范围导出的小区分类单元（5）返回其逻辑值表示雷达小区内的目标返回的小区分类信号被分类为第一次，并且多个 旅行信号。 在微处理器（12）中，合并覆盖一个单个目标的单元被组合以形成一个簇，同时确定表示由簇覆盖的目标的信号。 此外，在微处理器（12）中，导出集群分类信号，其逻辑值表示集群内的目标返回被分类为第一行程和多行程信号。 如果从源于归类为第一行程回波的目标返回中导出代表集群所覆盖的目标的信号。
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公开(公告)号：US4524358A
公开(公告)日：1985-06-18
申请号：US353693
申请日：1982-03-01
申请人： Jan Bergman , Pieter Van Genderen , Willem A. Hol
发明人： Jan Bergman , Pieter Van Genderen , Willem A. Hol
IPC分类号： G01S7/32 , G01S7/295 , G01S13/52 , G01S13/524 , G01S13/53 , G01S13/532 , G01S7/28
CPC分类号： G01S13/532 , G01S13/5246
摘要： In a pulse radar apparatus target returns are detected, sampled, digitized per range quant and frequency analyzed. The apparatus includes a cell classification unit (5) for deriving from the spectrum of the target returns a cell classification signal, whose logical values indicate whether the target returns within a radar cell are classified to be from a moving target or from a fixed target. In a microprocessor (15) the cells, which cluster, while a signal represenmtative of the target covered by the collectively cover one single target, are combined to form a cluster is determined. In the microprocessor (15) a cluster classification signal is derived, whose logical values indicate whether the target returns within the cluster are classified to be from a moving target or from a fixed target. The signal representative of the target covered by the cluster is read out if it is derived from target returns classified to be from moving targets.
摘要翻译： 在脉冲雷达装置中，每个范围的量化和频率分析检测，采样，数字化目标返回。 该装置包括用于从目标的频谱导出的小区分类单元（5）返回小区分类信号，其逻辑值表示雷达小区内的目标返回是否被分类为来自移动目标或固定目标。 在微处理器（15）中，确定了聚集在集体覆盖一个目标的目标所覆盖的信号的聚类的单元被组合以形成簇。 在微处理器（15）中，导出集群分类信号，其逻辑值表示集群内的目标返回是否被分类为来自移动目标或从固定目标。 如果从源自移动目标的目标返回导出代表群集覆盖的目标的信号，则读出该信号。
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