公开(公告)号：US5530448A

公开(公告)日：1996-06-25

申请号：US559062

申请日：1983-12-05

申请人： Bernard L. Lewis

发明人： Bernard L. Lewis

IPC分类号： G01S13/10 ,  G01S13/28 ,  G01S13/30 ,  G01S13/528 ,  G01S13/524

CPC分类号： G01S13/528 ,  G01S13/282 ,  G01S13/30 ,  G01S13/103

摘要： An MTI with no blind speeds which compensates for antenna scan modulation.his design includes circuitry for generating and transmitting consecutive first, second and third doppler-tolerant FM pulses, wherein the first and third FM pulses have a given dispersion characteristic, and the second FM pulse has a dispersion characteristic which is the complex conjugate of the first and third FM pulses. Circuitry is then provided for receiving and compressing the first, second, and third echos from the first, second, and third pulses, respectively. Finally, a processing circuit is used to effectively add the first and third echo pulses and to subtract twice the second echo pulse from this sum to effect the detection of the moving target.

摘要翻译： 无盲速度的MTI可补偿天线扫描调制。 该设计包括用于产生和传输连续的第一，第二和第三多普勒容限FM脉冲的电路，其中第一和第三FM脉冲具有给定的色散特性，并且第二FM脉冲具有色散特性，其是第一， 和第三个FM脉冲。 然后提供电路以分别从第一，第二和第三脉冲接收和压缩第一，第二和第三回波。 最后，使用处理电路来有效地添加第一和第三回波脉冲，并且从该和减去第二回波脉冲的两倍以实现移动目标的检测。

公开(公告)号：US4727375A

公开(公告)日：1988-02-23

申请号：US810376

申请日：1985-12-18

申请人： Philippe Lacomme

发明人： Philippe Lacomme

IPC分类号： G01S13/26 ,  G01S7/28 ,  G01S7/292 ,  G01S13/22 ,  G01S13/528 ,  G01S7/30

CPC分类号： G01S13/22 ,  G01S13/528 ,  G01S7/28

摘要： The invention relates to a process for adapting the post integration in a switched pulse repetition frequency radar and a circuit implementing this process. For that, the post integration of the detected signals is effected as a function of the signal received from the Doppler filter. For that, switches are used controlled by comparator circuits.The invention is useful in frequency ambiguous coherent Doppler radars using recurrence frequency switching by blocks.

摘要翻译： 本发明涉及一种用于适配开关脉冲重复频率雷达中的后整合的过程和实现该过程的电路。 为此，检测信号的后整合是根据从多普勒滤波器接收的信号的函数来实现的。 为此，开关由比较器电路控制。 本发明在使用块重复频率切换的频率模糊相干多普勒雷达中是有用的。

公开(公告)号：US4308535A

公开(公告)日：1981-12-29

申请号：US86429

申请日：1979-10-19

申请人： Jean-Claude Guillerot ,  Michel Delauney

发明人： Jean-Claude Guillerot ,  Michel Delauney

IPC分类号： G01S7/292 ,  G01S13/22 ,  G01S13/528 ,  G01S7/04

CPC分类号： G01S13/225 ,  G01S13/528 ,  G01S7/2923

摘要： In a moving-target indicator in which the pulse-repetition period of an associated Doppler radar is subject to variation, incoming echo pulses appearing in the output of an i-f stage of the radar receiver are demodulated with the aid of two coherent reference signals in relative quadrature and the results are digitized for transmission over two parallel channels. In each channel, digitized signals corresponding to two consecutive echoes in a given range cell are subtracted from each other to provide a pair of difference signals which are passed through a weighting device for multiplication by factors which are trigonometric functions of a selected Doppler frequency and of the difference between the actual repetition period and a theoretical constant value of that period. The weighted signals are subjected to further filtering before being utilized for further processing or display.

摘要翻译： 在相关联的多普勒雷达的脉冲重复周期经历变化的移动目标指示器中，出现在雷达接收机的一级的输出中的输入回波脉冲借助于相对的两个相干参考信号进行解调 正交并将结果数字化以便在两个并行通道上传输。 在每个通道中，对应于给定范围单元中的两个连续回波的数字化信号彼此相减，以提供一对差分信号，该差信号通过加权装置，以乘以所选择的多普勒频率的三角函数和 实际重复期与该期间的理论常数值之间的差异。 加权信号在被用于进一步处理或显示之前经过进一步的滤波。

公开(公告)号：US4249178A

公开(公告)日：1981-02-03

申请号：US84262

申请日：1979-10-12

申请人： Walker Butler

发明人： Walker Butler

IPC分类号： G01S13/528 ,  G01S13/52

CPC分类号： G01S13/528

摘要： A system and method for reducing the blind velocity problems in MTI coherent pulsed Doppler radar systems comprising an agile local oscillator which is preprogrammed to operate sequentially at more than one frequency unitl a target of interest is acquired.

摘要翻译： 一种用于减少MTI相干脉冲多普勒雷达系统中的盲速度问题的系统和方法，其包括被预编程为以多于一个频率单位操作的感兴趣目标的敏捷本地振荡器。

公开(公告)号：US3858208A

公开(公告)日：1974-12-31

申请号：US32976373

申请日：1973-02-05

申请人： HUGHES AIRCRAFT CO

发明人： PARKE D ,  GOLDBERG G ,  PRIESTER W ,  SCHEIDLER S

IPC分类号： G01S13/10 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  H01Q1/28 ,  H01Q25/00 ,  G01S9/10

CPC分类号： H01Q1/28 ,  G01S13/106 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  G01S13/872 ,  H01Q25/00

摘要： A radar system is disclosed which uses an established track predicted range, Rp, and radial velocity, Rp, of a target to select a frequency, F, and PRF for optimum range and doppler visibility in tracking. The procedure is to tentatively select a frequency not subject to interference; determine the highest possible band of PRF''s allowable between adjacent velocity blind regions computed from the equation

摘要翻译： 公开了一种雷达系统，其使用目标的已建立的轨道预测范围Rp和径向速度R p来选择频率F和PRF以获得跟踪中的最佳范围和多普勒可见度。 程序暂时选择不受干扰的频率; 确定从等式（PRF）= 2RpF / cn +/- DELTA（PRF）计算的相邻速度盲区之间允许的PRF的最高可能频带，其中DELTA（PRF）是其中心的速度盲区的已知半宽，c 是光速，n = 1,2,3。 。 。 确定目标在Rn和Rn + delta之间的范围盲区之外的允许频带内的最高PRF，其中delta是盲区的宽度，并且从第R个盲区的Rn由Rn = cn / 2（PRF）确定 ）其中n = 1,2,3。 。 。 。 初步检查确定目标的预测范围是否在原点的已知范围盲区delta'。 如果在允许的频带中没有发现具有范围可见性的PRF，则会发现PRF的另一个较低的允许频带（如果有的话），并检查范围可见性，直到找到有用的PRF或已经检查了所有可能性。 在后一种情况下，选择另一个频率，并重复该过程，直到找到有用的PRF或已经检查了所有频率。

公开(公告)号：US3855593A

公开(公告)日：1974-12-17

申请号：US35183873

申请日：1973-04-17

申请人： HOLLANDSE SIGNAALAPPARATEN BV

发明人： VAN HIJFTE H ,  EHBEL J

IPC分类号： G01S13/20 ,  G01S7/292 ,  G01S7/32 ,  G01S13/22 ,  G01S13/528 ,  G01S9/02 ,  G01S7/30

CPC分类号： G01S13/528 ,  G01S13/225

摘要： Pulse radar apparatus capable to generate cyclically a train of transmitter pulses with interpulse periods T1, T2, T1 + Delta T and T2 + Delta T. This apparatus comprises successively a receiver, a digital double canceller with a periodic shift time equalling the smallest interpulse period, a digital-to-analogue converter, a standard-pulse generator, a digital delay-line integrator with said periodic shift time, two parallel-connected branches meeting at a gate circuit, one branch comprising, successively, a first comparator and a correlator, and the other branch a second comparator and a delay element with a delay time of Delta T. The threshold level of the first comparator is maximally equal to that of the second comparator. On the receipt of each two sequential video signals with an interval Delta T the correlator causes that the gate circuit blocks the access to a PPI for the corresponding video signals supplied via the delay element.

摘要翻译： 脉冲雷达装置能够周期性地生成具有脉冲周期T1，T2，T1 + DELTA T和T2 + DELTA T的发射机脉冲串。

公开(公告)号：US3787851A

公开(公告)日：1974-01-22

申请号：US3787851D

申请日：1971-12-13

申请人： WESTINGHOUSE ELECTRIC CORP

发明人： HUGHES R

IPC分类号： G01S13/528 ,  G01S9/42

CPC分类号： G01S13/528

摘要： An AMTI radar in which the transmitted pulse train is comprised of multiple PRFs which are sequentially switched in a predetermined order during a target dwell time. A digital MTI comb or notch filter having a controlled reject and pass band characteristic for each PRF is utilized such that when operating in one of the lower PRFs, a wide notch characteristic is used for a time after radar pulse transmission during the interval which will provide unambiguous range for the highest PRF, i.e. during the interpulse interval of the highest PRF. Then a narrower notch characteristic is used for the remainder of the interpulse period of the instant PRF. A composite notch filter characteristic is thus obtained for all of the PRFs during a specific target dwell time which will reject not only ground clutter, but also low speed ground moving targets while passing relatively high speed airborne target returns during at least one of the PRFs.

摘要翻译： 一种AMTI雷达，其中所发送的脉冲串由在目标驻留时间内以预定顺序顺序切换的多个PRF组成。 使用具有每个PRF的受控拒绝和通带特性的数字MTI梳状或陷波滤波器，使得当在下部PRF之一中操作时，在间隔期间的雷达脉冲传输之后的时间内使用宽的陷波特性，其将提供 最高PRF的无差异范围，即在最高PRF的脉冲间隔期间。 然后，对于瞬时PRF的脉冲间隔的剩余部分使用较窄的陷波特性。 因此，在特定的目标停留时间内，对于所有的PRF，可以获得复合陷波滤波器特性，该特定目标驻留时间不仅会抑制地面杂波，而且还会在至少一个PRF期间通过相对高速的机载目标返回时降低低速地面移动目标。

公开(公告)号：US3631489A

公开(公告)日：1971-12-28

申请号：US3631489D

申请日：1969-10-02

申请人： NORTH AMERICAN ROCKWELL

发明人： COOPER GEORGE P

IPC分类号： G01S13/528 ,  G01S9/42

CPC分类号： G01S13/528

摘要： An azimuthally scanning, pulse-energy system employing doppler processing of clutter-referenced received echoes of pulsed transmission, including means for improved discrimination between high-speed moving targets displaying ambiguous doppler shifts and targets of lesser velocity. The pulse repetition rate of the pulsed energy system is periodically alternated between two rates, and the received signals associated with each pulse repetition rate separately doppler processed. Variations in the apparent doppler shift of a target in response to variation in the system pulse repetition rate is deemed indicative of a target of interest.

公开(公告)号：US3408647A

公开(公告)日：1968-10-29

申请号：US39107364

申请日：1964-08-18

申请人： NORTH AMERICAN ROCKWELL

发明人： DYNAN FOREST J ,  WHITNAH RICHARD G

IPC分类号： G01S13/524 ,  G01S13/528 ,  G01S13/64

CPC分类号： G01S13/528 ,  G01S13/5242 ,  G01S13/64

公开(公告)号：US3341847A

公开(公告)日：1967-09-12

申请号：US55255666

申请日：1966-05-24

申请人： NORTH AMERICAN AVIATION INC

发明人： FRIED WALTER R ,  SPRAGUE TED G

IPC分类号： G01S13/524 ,  G01S13/528 ,  G01S13/64

CPC分类号： G01S13/528 ,  G01S13/5242 ,  G01S13/64