公开(公告)号：US5383164A

公开(公告)日：1995-01-17

申请号：US74940

申请日：1993-06-10

申请人： Terrence Sejnowski ,  Shao L. Li

发明人： Terrence Sejnowski ,  Shao L. Li

IPC分类号： G06K9/62 ,  H01Q3/26 ,  H04B1/10 ,  H04B1/12 ,  G01S13/68

CPC分类号： G06K9/624 ,  H01Q3/2605 ,  H03H2021/0034 ,  H04B1/1081 ,  H04B1/126

摘要： A system for separating mixed signal sources by processing a received signal through the combination of a beamforming network and an adaptive Herault-Jutten network. The conventional Herault-Jutten network is useful for separating independent signals that have been linearly mixed, but cannot separate a mixture of several independent signals in free field conditions because of the propagation time delays between sources and sensors. The system of this invention combines planar beamforming techniques with a conventional HJ network to adaptively distinguish among signals having delays introduced by the propagation medium. A new sensor filter scheme is introduced to eliminate beamforming variation with frequency over the band of interest. The resulting system has application to adaptive interferer rejection and to acoustic and cellular communications receivers.

摘要翻译： 一种用于通过波束成形网络和自适应Hérault-Jutten网络的组合处理接收信号来分离混合信号源的系统。 常规的Hérault-Jutten网络对于分离已经线性混合的独立信号是有用的，但是由于源和传感器之间的传播时间延迟，在自由场条件下不能分离几个独立信号的混合。 本发明的系统将平面波束形成技术与常规HJ网络相结合，以自适应地区分由传播介质引入的延迟的信号。 引入了一种新的传感器滤波器方案，以消除在感兴趣的频带上的频率的波束成形变化。 所得到的系统具有适用于自适应干扰源抑制和声学和蜂窝通信接收机的应用。

公开(公告)号：US5227796A

公开(公告)日：1993-07-13

申请号：US866854

申请日：1992-04-10

申请人： Erik R. Arvidsson

发明人： Erik R. Arvidsson

IPC分类号： G01S13/68

CPC分类号： G01S13/685

摘要： A method of detecting the division of a radar target can detect a target, for instance caused by the release of a weapon from an aircraft which is tracked by a monopulse radar whose antenna is aligned onto the target with the aid of azimuth and/or elevation difference signals. Division of the radar target can be detected irrespective of whether the target is equipped with and uses an interference transmitter, by establishing a search channel in the radar difference channels. This channel has a sensitivity which is very low in a direction towards the tracked target, but which increases rapidly in directions which deviate somewhat from the direction towards the target. The search channel can be established by comparison of the absolute values of the signal levels in the difference channels with a threshold value.

公开(公告)号：US4926183A

公开(公告)日：1990-05-15

申请号：US302249

申请日：1989-01-27

申请人： Louis Fourdan

发明人： Louis Fourdan

IPC分类号： G01S13/44 ,  G01S13/68

CPC分类号： G01S13/44 ,  G01S13/685

摘要： A radar, notably for the correction of artillery fire, comprises means for an antenna scan, in bearing, in a limited zone .DELTA.G around a central position coinciding with the objective in that, and means to compare the received signals with a set of reference signals representing the responses awaited from virtual targets that are evenly spaced out, in bearing, within the monitored space .DELTA.G.

摘要翻译： 特别是用于校正火炮的雷达包括用于天线扫描的装置，在轴承中，围绕与该目标相符的中心位置的有限区域DELTA G以及将接收的信号与一组参考值进行比较的装置 表示在受监视的空间DELTA G内均匀地间隔开的虚拟目标的等待响应的信号。

公开(公告)号：US4788547A

公开(公告)日：1988-11-29

申请号：US408294

申请日：1973-10-16

申请人： Michael A. Jones ,  John R. G. Woods

发明人： Michael A. Jones ,  John R. G. Woods

IPC分类号： G01S7/285 ,  G01S13/44 ,  G01S13/68 ,  H03J7/02 ,  H03L7/107

CPC分类号： H03J7/02 ,  G01S13/4436 ,  G01S13/4445 ,  G01S13/4472 ,  G01S13/685 ,  G01S7/285 ,  H03L7/107

摘要： A static-split tracking radar system with substantially improved performance. The system includes parallel signal processing channels for processing sum and difference signals from a target-seeking aerial array, to produce target tracking signals. Novel means are provided for trimming relative phase and gain of these channels to achieve substantially perfect matching, which gives a receiver stability sufficient for homing head use in a guided missile system. The system also includes a receiver for acquiring a reference frequency signal, the receiver having novel bandwidth adaptation and doppler tracking facilities. Other novel features provide improved clutter rejection and jamming immunity.

摘要翻译： 一种具有显着提高性能的静态分割跟踪雷达系统。 该系统包括用于处理来自寻靶天线阵列的和信号和差分信号的并行信号处理通道，以产生目标跟踪信号。 提供了用于修整这些通道的相对相位和增益的新颖装置，以实现基本上完美的匹配，这使接收机稳定性足以在导弹系统中用于归位头。 该系统还包括用于获取参考频率信号的接收机，接收机具有新颖的带宽适配和多普勒跟踪设备。 其他新颖特征提供了改善的杂波抑制和抗干扰能力。

公开(公告)号：US4656480A

公开(公告)日：1987-04-07

申请号：US671663

申请日：1984-11-15

申请人： Roland Allezard ,  Jean-Luc Degouy

发明人： Roland Allezard ,  Jean-Luc Degouy

IPC分类号： G01S7/40 ,  G01S13/44 ,  G01S13/68

CPC分类号： G01S7/4056 ,  G01S13/44 ,  G01S2007/406

摘要： The radar comprises in known manner a transmitter (1), a transmitting antenna (E.sub.1), two receiving antennas (R.sub.1,R.sub.2), mixers (6,7) and means for processing the subtractive beat signals supplied by the mixers for effecting detection of the bearing of a target (10) and of the range and/or the relative velocity of the target. According to the invention, a target simulator is provided to correct the phase errors of electrical and mechanical origins. The simulator comprises a transmission circuit including a modulator (11) and a simulated target echo transmission antenna (E.sub.2) which transmits towards the receiving antenna. The radar also includes means for processing a beat signal derived from the simulated echo and for effecting detection of the simulated target bearing and means for correcting phase errors.

摘要翻译： 该雷达以已知的方式包括发射机（1），发射天线（E1），两个接收天线（R1，R2），混频器（6,7）和用于处理由混频器提供的减法拍频信号的装置，用于实现 目标（10）的轴承以及目标的范围和/或相对速度。 根据本发明，提供了一种目标模拟器来校正电气和机械起源的相位误差。 模拟器包括发射电路，其包括向接收天线发射的调制器（11）和模拟目标回波发射天线（E2）。 雷达还包括用于处理从模拟回波得到的拍频信号并用于实现模拟目标轴承的检测和用于校正相位误差的装置的装置。

公开(公告)号：US4646094A

公开(公告)日：1987-02-24

申请号：US520276

申请日：1983-08-04

申请人： Theodore E. Stevenson

发明人： Theodore E. Stevenson

IPC分类号： G01S7/28 ,  G01S13/44 ,  G01S13/68

CPC分类号： G01S7/2813 ,  G01S13/44

摘要： Discrimination between sidelobe and main beam reception of interference signals in a lobe on receive only radar is accomplished by a method of operation in which interference signals are stored and averaged for the radar receive beam positions of boresight, up, down, left and right. Interference signals received at boresight are compared with interference signals received at each off-boresight beam position. Interference signals received at boresight are also differenced with interference signals received at the off-boresight beam positions and the results are compared with beam width defining threshold factors. The determined values are applied to logic functions that indicate reception of interference signals outside of the main beam pattern.

摘要翻译： 通过一种操作方法来实现旁瓣与主波束接收干扰信号之间的区别，其中对于视轴，上下左右的雷达接收波束位置存储和平均干扰信号。 在视轴处接收的干扰信号与在每个离开视轴波束位置处接收的干扰信号进行比较。 在视轴处接收到的干扰信号也与在偏离视线光束位置处接收的干扰信号不同，并且将结果与限定阈值因子的波束宽度进行比较。 确定的值被应用于指示在主波束图案外部接收干扰信号的逻辑功能。

公开(公告)号：US4220953A

公开(公告)日：1980-09-02

申请号：US918791

申请日：1978-06-26

申请人： Roland Carre

发明人： Roland Carre

IPC分类号： G01S13/44 ,  G01S13/68 ,  G01S9/22

CPC分类号： G01S13/685 ,  G01S13/4427

摘要： To improve the accuracy of angular measurements in a radar system by suppressing noise due to target glint, an angular-deviation signal .epsilon. derived from the output signals .SIGMA. and .DELTA. of a sum channel and a difference channel is gated so as to be read only when the sum signal .SIGMA. is at or near a maximum. In a more elaborate embodiment, passage of the deviation signal .epsilon. is also blocked when a quadrature-deviation signal .epsilon.q, likewise derived from the sum and difference signals .SIGMA. and .DELTA., has an absolute magnitude above a preferably adjustable threshold.

摘要翻译： 为了通过抑制由于目标闪光引起的噪声来提高雷达系统中的角度测量的精度，从和通道和差分通道的输出信号SIGMA和DELTA导出的角度偏差信号ε被选通，以便仅在 和信号SIGMA处于或接近最大值。 在更精细的实施例中，当从和和和差信号SIGMA和DELTA同样导出的正交偏差信号εq具有高于优选可调阈值的绝对幅度时，偏差信号ε的通过也被阻止。

公开(公告)号：US4190837A

公开(公告)日：1980-02-26

申请号：US915983

申请日：1978-06-16

申请人： Laurence Salvaudon ,  Jean-Claude Charlot

发明人： Laurence Salvaudon ,  Jean-Claude Charlot

IPC分类号： G01S7/36 ,  G01S13/44 ,  G01S13/68 ,  G01S9/22

CPC分类号： G01S7/36 ,  G01S13/4418

摘要： A protective system for a vehicle-borne tracking radar, designed to counter the effect of an off-target jammer whose interfering signals are picked up by a directive antenna together with echoes from an actual target, comprises a receiver with a sum channel and a difference channel. In the absence of a jammer, the sum channel is connected via a signal processor to telemetric circuitry in the radar associated with the vehicular guidance system which keeps the antenna axis trained upon the target as the vehicle homes in on same. When a strong jamming signal is detected, a switching device in the processor cuts off the sum channel from the telemetric circuitry and supplies the latter, instead, with rectified error signals from the difference channel, these error signals being also delivered prior to rectification to a tracking-control circuit which energizes an antenna rotator to hold its axis in line with the jammer. The presence of a jammer may be detected by a signal-level comparator with two circuit branches connected to the sum channel, these branches including respective integrators which are alternately supplied with incoming signals in a target window and in a jammer window occurring at different instants of a recurrence period. Another possible jammer-signal detector, which may be included in the processor, receives the rectified error signal from the difference channel in the target window and produces a "jammer present" signal whenever the accumulated error signals exceed a predetermined threshold.

摘要翻译： 一种用于车载跟踪雷达的保护系统，其被设计成用于抵消由干扰信号由指向天线拾取的偏移目标干扰器以及来自实际目标的回波的影响，包括具有和信道和差分的接收机 渠道。 在没有干扰器的情况下，总和信道通过信号处理器连接到与车辆引导系统相关联的雷达中的遥测电路，当车辆驻车在同一个位置时，将天线轴训练在目标上。 当检测到强干扰信号时，处理器中的切换装置从遥测电路中切断和信道，并将差分信号提供给来自差分信道的经整流的误差信号，这些误差信号也在纠正之前传送到 跟踪控制电路，其激励天线旋转器以保持其轴线与干扰器一致。 干扰信号的存在可以由具有连接到和信道的两个电路分支的信号电平比较器来检测，这些分支包括相应的积分器，其交替地提供目标窗口中的输入信号和在不同时刻发生的干扰窗口 复发期。 可能包含在处理器中的另一种可能的干扰信号检测器，只要累积的误差信号超过预定阈值，就从目标窗口中的差分信道接收经整流的误差信号并产生“干扰器存在”信号。

公开(公告)号：US4173762A

公开(公告)日：1979-11-06

申请号：US914466

申请日：1978-06-12

申请人： Vernal W. Thompson ,  Wilbert C. Anderson

发明人： Vernal W. Thompson ,  Wilbert C. Anderson

IPC分类号： G01S13/68 ,  H01Q3/10 ,  H01Q3/18 ,  G01S5/02 ,  H01Q3/12

CPC分类号： G01S13/68 ,  H01Q3/10 ,  H01Q3/18

摘要： Apparatus for generating elevation and azimuth reference signals for use in demodulating a tracking error signal to provide elevation and azimuth error components for use in adjusting the position of a tracking conical scan radar antenna, includes a template ring having a notched periphery and being attached to a rotatable nutator of the antenna such that its peripheral notches are in a predetermined angular phase relationship with a reference position on a feed horn attached on the nutator, during rotation of the feed horn with the nutator. The apparatus further includes an optical transducer and electronic circuitry coupled thereto for producing the reference signals from a signal generated by the transducer in response to rotation of the ring with the nutator. As the ring rotates with the nutator, its notched periphery makes or breaks a photon path between light beam generating and sensing elements of the transducer. The sensing element then generates the signal which is received by the electronic circuitry. In addition to the two reference signals produced by the circuitry, a sync signal is generated and used internally within the circuitry to insure that the reference signals produced are in a proper phase relationship to the reference position on the feed horn of the nutator during rotation thereof.

摘要翻译： 用于产生用于解调跟踪误差信号以提供用于调整跟踪锥形扫描雷达天线的位置的仰角和方位角误差分量的仰角和方位参考信号的装置包括具有凹口周边并被附接到 天线的可旋转的辅助器，使得其周边凹口与馈送喇叭与辅助器旋转期间，在附接在所述制动器上的馈电喇叭上的基准位置处于预定的角度相位关系。 该装置还包括光学换能器和耦合到其上的电子电路，用于根据由换能器产生的信号响应于所述环与所述制动器的旋转产生参考信号。 随着环与调节器一起旋转，其凹口的周边使得在光束产生和传感器的感测元件之间的光子路径发生或断开。 感测元件然后产生由电子电路接收的信号。 除了由电路产生的两个参考信号之外，产生同步信号并在电路内部使用同步信号，以确保所产生的参考信号与其在旋转期间在同步器的馈电喇叭上的参考位置处于适当的相位关系 。

公开(公告)号：US4148029A

公开(公告)日：1979-04-03

申请号：US731872

申请日：1976-10-13

申请人： Elmen C. Quesinberry

发明人： Elmen C. Quesinberry

IPC分类号： G01S13/68 ,  G01S7/44

CPC分类号： G01S13/68

摘要： A radar system of the type utilizing an optimal estimator to process raw range and angle track data for driving a radar antenna, where the tracking computations, range rate, and angular rate of the range vector are utilized in estimating the target velocity vector and the target acceleration vector. The attenuation inherent in the practical estimation of target acceleration is effectively removed for severely maneuvering targets by a compensating system that provides an attenuation factor, and multiplies the estimated acceleration output signal by the reciprocal of such factor. The implement control system is governed by the estimated target position and estimated target velocity from the estimator, and the modified acceleration signal of the compensating system.

摘要翻译： 一种利用最佳估计器处理用于驱动雷达天线的原始范围和角度轨迹数据的雷达系统，其中跟踪计算，范围速率和距离矢量的角速率用于估计目标速度矢量和目标 加速度矢量。 通过提供衰减因子的补偿系统，对目标加速度的实际估计固有的衰减被有效地消除，并且将估计的加速度输出信号乘以这种因子的倒数。 实施控制系统由估计的估计目标位置和估计的目标速度以及补偿系统的修改的加速度信号来控制。