公开(公告)号：US4635060A

公开(公告)日：1987-01-06

申请号：US617559

申请日：1984-06-05

申请人： Lawrence E. Mertens

发明人： Lawrence E. Mertens

IPC分类号： G01S7/288 ,  G01S7/30 ,  G01S7/40

CPC分类号： G01S7/288

摘要： A coherent-on-receive radar for determining the velocity of and distance to targets. The radar conventionally includes a transmitter of non-coherent pulses, an antenna for transmitting the pulses into space and receiving return signals from targets upon which the pulses impinge, a local oscillator and a phase detecting circuit responsive to the return signal and local oscillator signal for determining the phase difference between the respective signals. In accordance with the invention the radar includes a sample and hold circuit used in conjunction with the phase detecting circuit, prior to the receipt of any return signal, for storing for each transmitted pulse its phase difference from the local oscillator signal phase. The stored signal is used to modify the phase of one or the other of return signals sent to the phase detector or local oscillator signal as sent to the phase detector so the detector in effect detects the phase difference between each transmitted pulse and the return signals resulting therefrom.

摘要翻译： 一个相干接收雷达，用于确定目标的速度和距离。 雷达通常包括非相干脉冲的发射器，用于将脉冲发射到空间中并从脉冲入射的目标接收返回信号的天线，响应于返回信号和本地振荡器信号的本地振荡器和相位检测电路， 确定各个信号之间的相位差。 根据本发明，雷达包括在接收任何返回信号之前与相位检测电路结合使用的采样和保持电路，用于存储每个发送的脉冲与本地振荡器信号相位的相位差。 存储的信号用于修改发送到相位检测器的发送到相位检测器或本地振荡器信号的一个或另一个返回信号的相位，因此检测器实际上检测每个发送的脉冲与返回信号之间的相位差 由此。

公开(公告)号：US4208632A

公开(公告)日：1980-06-17

申请号：US921628

申请日：1978-06-30

申请人： Edward J. Sheldon ,  William C. Brown, Jr. ,  Thomas D. Shovlin ,  Ronald A. Wagner

发明人： Edward J. Sheldon ,  William C. Brown, Jr. ,  Thomas D. Shovlin ,  Ronald A. Wagner

IPC分类号： H03F3/68 ,  G01S7/28 ,  G01S7/285 ,  G01S7/34 ,  G01S13/44 ,  G01S13/50 ,  H03G3/20 ,  G01S7/30 ,  H03K5/20

CPC分类号： H03G3/3073 ,  G01S7/28

摘要： An improved radar receiver is shown to include a plurality of intermediate frequency and video frequency amplifiers, each one of such amplifiers being arranged to process received signals within a different range of amplitudes so that the overall dynamic range of such receiver may be equivalent to the dynamic range of a conventional radar receiver with automatic gain control.

摘要翻译： 改进的雷达接收机被示为包括多个中频和视频放大器，这些放大器中的每一个被布置成处理在不同幅度范围内的接收信号，使得这种接收机的整体动态范围可以等同于动态 具有自动增益控制的常规雷达接收机的范围。

公开(公告)号：US4049953A

公开(公告)日：1977-09-20

申请号：US699820

申请日：1976-06-24

申请人： Albert B. Evans, Jr.

发明人： Albert B. Evans, Jr.

IPC分类号： G01S7/36 ,  G01S7/40 ,  G01S13/12 ,  G01S13/22 ,  G01S7/30 ,  G06F15/20

CPC分类号： G01S13/225 ,  G01S13/12 ,  G01S7/36 ,  G01S7/4052 ,  G01S2007/4082

摘要： A complex pulse repetition frequency generator for producing a pulse repeion frequency (PRF) signal having programmable stagger intervals. The device consists of a clock for selecting one of a series of standard clock pulses which are used to increment a counter. A comparator compares the accumlated clock pulses with a stagger data output signal produced by a data memory source. When the outputs are equal, the comparator produces a PRF output pulse. Two data memory bands are provided; a random access memory in which stagger data can be programmed by a series of switches, and a preprogrammed read-only memory. Address counters are used with each memory unit and provide capability for addressing selected memory locations from the data memory sources. A pulse width generator allows the operator to vary the pulse width and utilizes an injection lock oscillator to prevent jitter whenever a standard clock pulse is used which is not an even multiple of a hundred nanoseconds.

摘要翻译： 一种用于产生具有可编程交错间隔的脉冲重复频率（PRF）信号的复合脉冲重复频率发生器。 该器件由用于选择用于增加计数器的一系列标准时钟脉冲之一的时钟组成。 比较器将累积的时钟脉冲与由数据存储器源产生的交错数据输出信号进行比较。 当输出相等时，比较器产生PRF输出脉冲。 提供两个数据存储带; 一个随机存取存储器，其中可以通过一系列开关来编程交错数据，以及一个预编程的只读存储器。 地址计数器与每个存储器单元一起使用，并提供从数据存储器源寻址所选存储器位置的能力。 脉冲发生器允许操作者改变脉冲宽度，并且使用注入锁定振荡器以在使用不是百纳秒的偶数倍的标准时钟脉冲时防止抖动。

公开(公告)号：US3968490A

公开(公告)日：1976-07-06

申请号：US466730

申请日：1974-05-03

申请人： Judson J. Gostin

发明人： Judson J. Gostin

IPC分类号： G01S7/292 ,  G01S13/524 ,  G01S7/30 ,  G01S9/42

CPC分类号： G01S13/5246 ,  G01S7/2927

摘要： Disclosed is a radar signal processor providing Moving Target Indicator (MTI) operation with Constant False Alarm Ratio (CFAR) capability. The processor affords substantially reduced incidence of false alarms due to large clutter scatterer returns which exceed normal detection thresholds even after suppression by conventional MTI processing, and at the same time it affords largely unimpaired subclutter visibility. These capabilities are achieved by paralleling the MTI channel with a second processor channel which provides CFAR operation by imposing an additional detection threshold effective to blank the response of the MTI channel to very large clutter scatterers.

摘要翻译： 公开了一种提供具有恒定错误报警比（CFAR）能力的移动目标指示器（MTI）操作的雷达信号处理器。 即使在通过常规MTI处理抑制之后，由于大的杂波散射体返回超过正常检测阈值，处理器提供了大大降低的误报率的发生率，同时它提供了很大程度上未受损的子切除器可视性。 这些功能通过与第二处理器通道并行来实现，该第二处理器通道通过施加额外的检测阈值来有效地消除MTI通道对非常大的杂波散射体的响应来提供CFAR操作。

公开(公告)号：US3913099A

公开(公告)日：1975-10-14

申请号：US4937670

申请日：1970-06-24

申请人： US NAVY

发明人： WEHNER DONALD R ,  PRICKETT MICHAEL J ,  GYLLING RAYMOND B

IPC分类号： G01S7/28 ,  G01S9/06 ,  G01S7/30

CPC分类号： G01S7/2806

摘要： An automatic, digitally controlled apparatus for improving radar target recognition and identification capabilities of high-range resolution radars. A transmitted high-range resolution pulse train produces a complex echo signal from a target illuminated thereby. The echo signal from the target illuminated consists of a series of discrete RF response pulses reflected from the scatter centers on the target. Each scatter center produces a reflected RF pulse response that is separated in time with respect to the other RF pulses an amount proportional to the position of its corresponding scatter center on the target with respect to the other scatter centers. Each response is processed in a different one of a plurality of delay channels having a variable delay element that is responsive to digital control signals. By selectively energizing each delay element in the delay channels, the RF pulses or responses received first are delayed until the last RF pulse or response in each echo signal is received. The processed response from each of the scatter centers can then be combined such that the combined peak response from the target will comprise an algebraic superposition of the individual responses from the scatter centers. Stored digital control signals based upon a priori target range profile signature data and corresponding to matched conditions for known targets are applied to the delay channels so that when the response from the target under surveillance matches to a matched condition for a known target, the target under surveillance is thereby identified.

公开(公告)号：US3906498A

公开(公告)日：1975-09-16

申请号：US36377673

申请日：1973-05-24

申请人： WESTINGHOUSE ELECTRIC CORP

发明人： TAYLOR JR JOHN W

IPC分类号： G01S13/22 ,  G01S13/528 ,  G01S7/30

CPC分类号： G01S13/225 ,  G01S13/528

摘要： A method and system for interfacing a variable interpulse period radar system with a fixed interpulse period output device is disclosed. The radar interpulse period is varied in a predetermined manner about an average interpulse period so that the sum of a predetermined plural number of varying interpulse periods is an integral multiple of the average period. The output interpulse period may then be a fixed submultiple of the average period. Target information for multiple radar transmissions is combined by a signal summing technique to prevent loss or degradation of target detectability. In accordance with the disclosed summing technique, a current target information signal is summed with a fractional portion of previously stored target data and the sum is then stored for further use.

摘要翻译： 公开了一种用于将可变脉冲间脉冲周期雷达系统与固定的脉冲间周期输出装置接口的方法和系统。 雷达脉冲周期以关于平均脉冲间隔的预定方式变化，使得预定的多个变化的脉冲间期的和与平均周期的整数倍。 然后，输出脉冲间隔可以是平均周期的固定分数。 通过信号求和技术组合多雷达传输的目标信息，以防止目标可检测性的损失或降级。 根据公开的求和技术，将当前目标信息信号与先前存储的目标数据的小数部分相加，然后存储该和以供进一步使用。

公开(公告)号：US3774201A

公开(公告)日：1973-11-20

申请号：US3774201D

申请日：1970-12-17

申请人： RAYTHEON CO

发明人： COLLINS J

IPC分类号： G01S13/64 ,  G01S7/30 ,  G01S9/02

CPC分类号： G01S13/64

摘要： A time compression system used for spectrum analysis of multichannel digital systems in which there are X identical input channels and Y identical filters. Each input is sampled in parallel and then quantized with an analog-to-digital converter. The inputs are then stored channel by channel in a random access memory. Readout is interleaved simultaneously with the writing and each channel is readout serially. The stored digital signals are converted back to serial analog signals and fed to a single bank of filters for spectrum analysis.

摘要翻译： 用于多通道数字系统频谱分析的时间压缩系统，其中有X个相同的输入通道和Y个相同的滤波器。 每个输入并行采样，然后用模拟 - 数字转换器进行量化。 然后，输入随机存取存储器逐个存储。 读出与写入同时交错，并且每个通道被串行读出。 存储的数字信号被转换回串行模拟信号，并馈送到单个滤波器以进行频谱分析。

公开(公告)号：US3714654A

公开(公告)日：1973-01-30

申请号：US3714654D

申请日：1972-01-06

申请人： US NAVY

发明人： WICKS S ,  JONES R

IPC分类号： G01R23/10 ,  G01S7/02 ,  G01S7/30 ,  G01S7/36

CPC分类号： G01S7/021 ,  G01R23/10

摘要： ECM pulse analyzer apparatus for automatically measuring pulse repetition frequency (PRF) and pulsewidth (PW) of incoming pulsed signals received by ECM receivers. Pulsewidth is measured by dual-threshold circuitry which eliminates noise effects by means of a high threshold level which sorts pulses for minimum amplitude and a lower threshold level at which pulsewidth is measured when a pulse exceeds the higher threshold. Pulse repetition frequency is measured by counting PRI during the two periods between the three pulses and converting PRI into PRF by counting up to the stored PRI value at a known rate in a predetermined time period whereby the number of times that the count can proceed is equal to the PRF corresponding to the stored PRI.

公开(公告)号：US3588896A

公开(公告)日：1971-06-28

申请号：US3588896D

申请日：1969-08-25

申请人： US NAVY

发明人： DUARTE ROBERT T

IPC分类号： G01S7/28 ,  G01S7/30 ,  G01S9/02

CPC分类号： G01S7/2806

摘要： A SYSTEM FOR COMBINING A PLURALITY OF INFORMATIONAL RADAR SIGNALS INTO A SINGLE COMPOSITE SIGNAL WHICH IS THEN RECORDED ON ONE CHANNEL OF A MAGNETIC TAPE. THE ORIGINAL SIGNALS ARE THEN RECONSTRUCTED FORM THE COMPOSITE SIGNAL AND APPLIED TO A RADAR DISPLAY SCOPE WHICH RENDERS A PRESENTATION IDENTICAL TO THAT OF THE ORIGINAL VIDEO SIGNAL.

公开(公告)号：US4731612A

公开(公告)日：1988-03-15

申请号：US588935

申请日：1984-01-27

申请人： Claude A. Chalard ,  Christian F. H. Trilles

发明人： Claude A. Chalard ,  Christian F. H. Trilles

IPC分类号： G01S7/292 ,  G01S13/28 ,  G01S7/30 ,  G01S7/44

CPC分类号： G01S7/2928 ,  G01S13/28

摘要： A doppler radar arrangement that is able to reject short pulses. It does so by comparing the modulus of a difference vector with the same parameter during the preceding PRI. Information corresponding to "No short pulse" or to "Short pulse detected" is stored during each pulse repetition interval. The short pulse signal is replaced by the preceding signal in the same range gate only once by comparing the stored information relating to the current i.sup.th PRI and to the preceding i-1.sup.th and i-2.sup.th PRI.

摘要翻译： 一种能够抑制短脉冲的多普勒雷达装置。 通过在前一个PRI期间比较差矢量的模量与相同的参数来实现。 在每个脉冲重复间隔期间存储对应于“无短脉冲”或“短脉冲检测”的信息。 通过比较存储的与当前第i个PRI相关的信息和与前一个第i-1和第i-2个PRI相关的信息，短脉冲信号由同一范围内的前一信号代替一次。