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：US4507659A

公开(公告)日：1985-03-26

申请号：US506945

申请日：1983-06-22

申请人： Bernard L. Lewis ,  Frank F. Kretschmer, Jr.

发明人： Bernard L. Lewis ,  Frank F. Kretschmer, Jr.

IPC分类号： G01S13/28 ,  G01S7/30

CPC分类号： G01S13/288

摘要： A method and apparatus for reducing the peak to peak-sidelobe ratio of the compressed pulse output signal of a symmetrical frequency derived phase coded pulse expander-compressor. The apparatus includes a bandwidth limiting device connected to the output of a symmetrical frequency derived phase coded pulse expander-compressor.

摘要翻译： 一种用于降低对称频率导出相位编码脉冲扩展器 - 压缩机的压缩脉冲输出信号的峰峰值旁瓣比的方法和装置。 该装置包括连接到对称频率导出的相位编码脉冲扩展器 - 压缩器的输出的带宽限制装置。

公开(公告)号：US4503432A

公开(公告)日：1985-03-05

申请号：US331847

申请日：1981-12-17

申请人： Walter H. Bailey

发明人： Walter H. Bailey

IPC分类号： G01S7/292 ,  G01S13/524 ,  G01S7/30

CPC分类号： G01S13/5246 ,  G01S7/2922

摘要： A constant false alarm rate is achieved in a moving-target-indicator radary controlling the threshold in doppler channels according to the level of clutter in range gates near the range rate being examined for the presence of a target. Processing is simplified by using analog signals in charge coupled devices for target detection.

摘要翻译： 在移动目标指示器雷达中通过根据正在检查的目标的存在的范围速率附近的范围门限中的杂波水平来控制多普勒通道中的阈值来实现恒定的误报率。 通过在电荷耦合器件中使用模拟信号进行目标检测来简化处理。

公开(公告)号：US4223309A

公开(公告)日：1980-09-16

申请号：US945729

申请日：1978-09-25

申请人： Delmar V. Payne

发明人： Delmar V. Payne

IPC分类号： G01S7/292 ,  G01S13/95 ,  G01S7/30 ,  G01S9/60

CPC分类号： G01S13/953 ,  G01S7/2923

摘要： Information about air turbulence and wind shear can be obtained by analyzing the fluctuation of the envelope, at the detector output of a pulse radar, of backscatter from hydrometeors which trace the wind field. Further, under some conditions, radar returns can be identified as being backscatter from weather targets or from the ground or sea. The detector output signal is quantized into one of several class intervals whose boundaries, in mid-range, are in the same ratio. Consecutive radar returns from scatterers at the same nominal range and scan angle are quantized into either the same or different class intervals. The ratio of the number of consecutive quantizations that are different to the number of trials is a measure of the variance of relative velocities at that range and scan angle. This technique permits economical implementation of a plan position display of, for example, the expected severity of turbulence or wind shear at each increment of range and azimuth angle since duplication of circuits is not required.

摘要翻译： 关于空气湍流和风切变的信息可以通过分析在脉冲雷达的检测器输出处的跟踪风场的水力计的后向散射的包络的波动来获得。 此外，在某些情况下，雷达回报可以被识别为从天气目标或地面或海域反向散射。 检测器输出信号被量化为几个等级间隔之一，其中间范围内的边界具有相同的比例。 来自相同标称范围和扫描角度的散射体的连续雷达返回量化为相同或不同的等级间隔。 与试验次数不同的连续量化的比例是在该范围和扫描角度下的相对速度的方差的度量。 这种技术允许在不需要电路复制的情况下，经济地执行例如在范围和方位角的每个增量处的湍流或风切变的预期严重性的平面位置显示。

公开(公告)号：US4197539A

公开(公告)日：1980-04-08

申请号：US954028

申请日：1978-10-23

申请人： Tomohiko Suzuki

发明人： Tomohiko Suzuki

IPC分类号： G01S7/32 ,  G01S7/28 ,  G01S7/292 ,  G01S7/34 ,  G01S7/527 ,  G01S7/30

CPC分类号： G01S7/2923 ,  G01S7/2806 ,  G01S7/527

摘要： A target detecting and ranging system of the type transmitting search pulses and receiving echo pulses is disclosed. The system employs an input receiver receiving return signals and feeds them to an extracting circuit, a gate and cancellation circuit. The extracting circuit, functions to supply an input to the gate of signals containing relevant information such that gate output is only irrelevant information. The cancellation circuit, receiving the gate output and the return signals, eliminates irrelevant signals by mutual cancellation. The circuit for extracting relevant signals comprises in one embodiment a differentiator, analog store and parallel adder with a shaping circuit, clipping the output below a threshold level. Digital implementation is also discribed. The differentiator may also be replaced by a compression circuit. In a second embodiment of the system an integrator is interposed between the gate and the cancellation circuit. The integrator has a long time constant for short duration return pulses, that is containing relevant data and a short time constant for long duration pulses and functions to improve shaping of the irrelevant signals supplied to the cancellation circuit. The output of the cancellation circuit to both embodiments is fed to an amplifier and then to a display device.

摘要翻译： 公开了一种发送搜索脉冲和接收回波脉冲的目标检测和测距系统。 该系统采用接收返回信号的输入接收器并将其馈送到提取电路，门和消除电路。 提取电路用于向门的输入提供包含相关信息的信号，使得门输出仅是不相关的信息。 接收门极输出和返回信号的取消电路通过​​相互取消消除了不相关的信号。 用于提取相关信号的电路在一个实施例中包括具有整形电路的微分器，模拟存储器和并行加法器，将输出限幅在阈值以下。 数字实现也被描述。 微分器也可以由压缩电路代替。 在系统的第二实施例中，积分器插入在栅极和消除电路之间。 积分器具有短时间常数，用于短时间返回脉冲，其包含相关数据和长时间脉冲的短时间常数，以及用于改善提供给消除电路的不相关信号的形状的功能。 两个实施例的消除电路的输出被馈送到放大器，然后被馈送到显示装置。

公开(公告)号：US3973260A

公开(公告)日：1976-08-03

申请号：US503827

申请日：1974-09-06

申请人： Ralph J. Costantini ,  Charles R. Parsons ,  Stanley J. Schretter

发明人： Ralph J. Costantini ,  Charles R. Parsons ,  Stanley J. Schretter

IPC分类号： G01S7/292 ,  G01S7/34 ,  G01S13/28 ,  G01S7/30 ,  G01S9/233

CPC分类号： G01S13/282 ,  G01S7/2922 ,  G01S7/34

摘要： Pulse measurement of chirped radar returns is made before dechirping by these of a linear detector averaging circuits and time delay circuits such that the measurement is indicative of the RMS power of the pulse. Depending on the received chirp pulse different averaging circuits and time delay circuits are switched in so that its output is coincidental with the delayed dechirped signal. Output is encoded for a digital indication of the power and is fed through scalers to set the threshold of the video signal processor.

摘要翻译： 通过使用线性检测器平均电路和时间延迟电路，在去啁啾之前进行啁啾雷达返回的脉冲测量，使得测量表示脉冲的RMS功率。 根据接收到的啁啾脉冲，不同的平均电路和时间延迟电路被切换，使得其输出与延迟的去啁啾信号一致。 输出被编码为功率的数字指示，并通过定标器馈送以设置视频信号处理器的阈值。

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：US3662386A

公开(公告)日：1972-05-09

申请号：US3662386D

申请日：1970-05-04

申请人： US NAVY

发明人： BRYANT KENNETH O

IPC分类号： G01S13/22 ,  G01S7/36 ,  G01S7/30

CPC分类号： G01S13/222

摘要： A programmable pseudorandom PRF generator for generating allowable combinations of PRF and jitter percent comprising a program selector means for inspecting the output of the selector for unwanted codes and a 20-bit pseudorandom generator for generating an output pulse having an allowed combination of PRF and jitter percent such that the output pulse, when jittered, has the same average frequency as the unjittered pulse.

摘要翻译： 一种用于产生PRF和抖动百分比的可允许组合的可编程伪随机PRF发生器，包括用于检查选择器的输出的无用代码的程序选择器装置和用于产生具有允许的PRF和抖动百分比组合的输出脉冲的20位伪随机发生器 使得当抖动时的输出脉冲具有与未抖动脉冲相同的平均频率。

公开(公告)号：US4521779A

公开(公告)日：1985-06-04

申请号：US143399

申请日：1980-04-24

申请人： Bernard L. Lewis

发明人： Bernard L. Lewis

IPC分类号： G01R23/20 ,  G01S13/28 ,  G01S13/75 ,  G01S7/30 ,  G01S13/52

CPC分类号： G01S13/75 ,  G01R23/20 ,  G01S13/288

摘要： A system for polyphase encoding transmitted pulses of energy and for decog the received signals to enhance returns from the range interval being examined during a particular processing period and attenuate returns from contiguous range intervals (pulse compression). The system includes a decoding device which comprises a delay circuit having N distributed outputs including its input for producing a uniform delay between adjacent outputs corresponding to N inputted elements of a received phase-coded signal of length N.sup.2 ; a conjugator circuit coupled to the first N/2 successive outputs of the delay circuit; a first signal-combining circuit coupled to the conjugator circuit and to the last N/2 successive outputs of the delay circuit; a multiplier circuit coupled to the first signal-combining circuit; and a second signal-combining circuit coupled to the multiplier circuit. The decoding device provides a decoding phase shift -.DELTA..phi..sub.k,p to the signal elements of the phase-coded signal wherein.DELTA..phi..sub.k,p =-(2.pi./N)[k-(1/2)(N-1)][p-(1/2)(N-1)]is the phase of the pth code element in the kth subgroup and k=0,1,2, . . . , N-1 and p=0,1,2, . . . , N-1, with N an even integer, and thereafter adds the phase-shifted signal elements at the same time to produce a narrow pulse with an accompanying increase in effective peak signal.

摘要翻译： 一种用于多相编码传输的能量脉冲并用于对接收的信号进行解码以增强在特定处理周期期间正在检查的范围间隔的返回的系统，并且衰减来自连续范围间隔（脉冲压缩）的返回。 该系统包括一个解码装置，它包括具有N个分布式输出的延迟电路，包括其输入，用于产生对应于长度为N2的接收相位编码信号的N个输入元素的相邻输出之间的均匀延迟; 耦合到延迟电路的第一N / 2个连续输出的共轭电路; 耦合到所述共轭电路和延迟电路的最后N / 2个连续输出的第一信号组合电路; 耦合到第一信号组合电路的乘法器电路; 以及耦合到所述乘法器电路的第二信号组合电路。 解码装置向相位编码信号的信号元素提供解码相移DELTA phi k，p，其中DELTA phi k，p =（2π/ N）[k-（1/2）（N-1） ）] [p-（1/2）（N-1）]是第k个子群中第p个代码元素的相位，k = 0,1,2，...。 。 。 ，N-1和p = 0,1,2。 。 。 N-1，N为偶数整数，然后同时相加移相信号元件，产生伴随有效峰值信号增加的窄脉冲。

公开(公告)号：US4137532A

公开(公告)日：1979-01-30

申请号：US792279

申请日：1977-04-29

申请人： John W. Taylor, Jr. ,  Raymond G. Martin

发明人： John W. Taylor, Jr. ,  Raymond G. Martin

IPC分类号： G01S13/22 ,  G01S13/524 ,  G01S9/42 ,  G01S7/30

CPC分类号： G01S13/5248 ,  G01S13/225

摘要： A low PRF pulse doppler radar system utilizing a VIP digital filter bank signal processor to suppress echoes from terrain, rain, and chaff, and pass echoes from aircraft moving at higher speeds is disclosed.Each of a plurality of VIP filters individually provides high attenuation to undesired signals over designated frequency bands, the width of which are a large fraction of 1/T.sub.av where T.sub.av is the average interpulse period. Little or no attenuation of desired signals having doppler frequencies greater than 1/T.sub.av occurs. The outputs of the plurality of filters are desensitized to prevent false alarm from clutter, and the presence of a desired radar pulse echo is determined by a comparison with a threshold level.

摘要翻译： 公开了一种低PRF脉冲多普勒雷达系统，利用VIP数字滤波器组信号处理器来抑制来自地形，雨和谷壳的回波，并且以更高速度移动的飞机通过回波。