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1. 发明授权

US5359329A Jammer reference target measurement system 失效
标题翻译：干扰参考目标测量系统
公开(公告)号：US5359329A
公开(公告)日：1994-10-25
申请号：US247578
申请日：1981-03-18
申请人： Bernard L. Lewis , Frank F. Kretschmer, Jr.
发明人： Bernard L. Lewis , Frank F. Kretschmer, Jr.
IPC分类号： G01S7/28 , G01S7/36 , G01S13/44
CPC分类号： G01S7/2813 , G01S7/36 , G01S13/44
摘要： A system for cancelling jammer signals entering the mainlobe of a monopulseadar and providing target locations with respect to the jammer position comprising for a sequential lobing embodiment: measuring the angular position of the jammer in the radar's mainlobe via the use of monopulse sum and difference signals, pointing the radar antenna so that the jammer is positioned within the 3 dB points of the mainlobe of the monopulse antenna, converting the sum and difference echo signals received with the antenna in this position from the next radar transmission into a second set sum and difference signals, applying this second set of sum and second set of difference signals to the inputs of an adaptive canceller to cancel the jamming signal therein and storing these signals in time sequential order, changing the orientation of the radar antenna by a small arbitrary elevation angle, converting the sum and difference echo signals received with the antenna in this new position from a third radar transmission into a third set of sum and difference signals, applying this third set of sum signals and third set of difference signals in reverse order relative to the second set of signals to the inputs of an adaptive canceller to cancel the jamming signal therein, reading out the adaptively cancelled stored echo signals from the second radar transmission into one input of a divider in time coincidence with the application of the adaptively cancelled echo signals from the same targets from the third radar transmission to the other input of the divider to obtain ratio signals proportional to the elevation angle separating the individual targets from the jammer.
摘要翻译：一种用于消除进入单脉冲雷达的主瓣的干扰信号并提供关于干扰信号位置的目标位置的系统，包括用于顺序的实施例：通过使用单脉冲和和差信号来测量雷达主瓣中干扰信号的角位置指向雷达天线使干扰器位于单脉冲天线的主瓣的3dB点内，将在该位置接收的天线的和和差回波信号从下一个雷达传输转换为第二组和和差信号，将第二组和差和第二组差分信号应用到自适应消除器的输入端，以消除其中的干扰信号并以时间顺序存储这些信号，将雷达天线的方向改变小的任意仰角，将从天线接收到的和差分回波信号从第三个转换到新的位置将第三组和信号和第三组差分信号相对于第二组信号以相反的顺序应用于自适应消除器的输入以消除其中的干扰信号，读取将来自第二雷达传输的自适应地取消的存储的回波信号从与第三雷达传输的相同目标应用到分频器的另一输入端的自适应取消的回波信号的时间一致地获得分频器的一个输入，以获得比率信号与将各个目标与干扰物分开的仰角成正比。

2. 发明授权

US5351058A General purpose sidelobe canceller system 失效
标题翻译：通用旁瓣消除系统
公开(公告)号：US5351058A
公开(公告)日：1994-09-27
申请号：US25952
申请日：1979-02-26
申请人： Frank F. Kretschmer, Jr. , Bernard L. Lewis
发明人： Frank F. Kretschmer, Jr. , Bernard L. Lewis
IPC分类号： G01S7/28 , G01S7/36 , G01S3/16 , G01S3/28
CPC分类号： G01S7/2813 , G01S7/36
摘要： A digital, open-loop, sidelobe canceller system includes an arrangement ofuxiliary-channel preprocessing cancellers and a series of main-channel cancellers in which specific cancellers average a different number of samples for cancelling both barrage (continuous) jamming and false-target-repeater jamming, which enter the sidelobes of a radar antenna. The preprocessing cancellers and each of the main-channel cancellers, except the last succeeding main-channel canceller, use long-time averaging (averaging over a large number, n, of samples of the main and auxiliary signals, where n>>2) for removing barrage jamming from the main signal. The last succeeding main-channel canceller uses short-time averaging (averaging over approximately 2-4 samples) for removing false-target-repeater jamming from the main signal.
摘要翻译：数字，开环，旁瓣消除器系统包括辅助信道预处理消除器和一系列主信道消除器的布置，其中特定的消除器平均不同数量的采样以消除阻塞（连续）干扰和假目标 - 中继器干扰，其进入雷达天线的旁瓣。预处理消除器和每个主信道消除器除了最后一个后续的主信道消除器之外，使用长时间平均（大于n的平均值，n个主信号和辅助信号的样本n，其中n >> 2）用于消除主信号堵塞的堵塞。最后一个成功的主通道消除器使用短时间平均（大约2-4个样本的平均值），用于从主信号中消除假目标中继器干扰。

3. 发明授权

US4566011A Palindromic polyphase code expander-compressor 失效
标题翻译：回音多相码扩展器压缩器
公开(公告)号：US4566011A
公开(公告)日：1986-01-21
申请号：US512045
申请日：1983-07-08
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
CPC分类号： G01S13/288
摘要： A digital pulse expander-compressor for generating polyphase coded pulses which are highly doppler tolerant and have autocorrelation functions which are identical under frequency sweep reversal. The expander-compressor comprises an input expansion circuit for generating N replicas of a pulse to be expanded, a matched filter FFT with phase weights disposed in each input thereto, and phase inverters disposed in every other output therefrom, and a time dispersion circuit for appropriately adding the pulses from the FFT output to yield an expanded or compressed pulse. The phase weights to be inserted at the inputs to the FFT are determined by the equation .phi..sub.n =.+-..pi.(n-1/2).sup.2 /.rho. for a PP-3 code or .phi..sub.n =.+-.[.pi.(n-1/2).sup.2 /.rho.-.pi.(n-1/2)] for a PP-4 code, where .rho. is the pulse compression ratio and n varies from 1, 2, 3 . . . .rho..
摘要翻译：一种数字脉冲扩展器 - 压缩器，用于产生高度多普勒容忍的多相编码脉冲，并且具有在频率扫描反转下相同的自相关函数。扩展器压缩机包括用于产生要扩展的脉冲的N个副本的输入扩展电路，在其每个输入中设置相位权重的匹配滤波器FFT以及设置在每个输入中的相位反相器，以及适当地设置的时间色散电路从FFT输出添加脉冲以产生扩展或压缩脉冲。要在FFT的输入端插入的相位权重由PP-3码的方程式phi n = + / - pi（n-1/2）2 / rho或者phi n = + / - n-1/2）2 / rho-pi（n-1/2）]，其中rho是脉冲压缩比，n从1，2，3变化。。。 rho。

4. 发明授权

US4464768A Adaptive preprocessing system 失效
标题翻译：自适应预处理系统
公开(公告)号：US4464768A
公开(公告)日：1984-08-07
申请号：US580510
申请日：1975-05-28
申请人： Bernard L. Lewis , Frank F. Kretschmer, Jr.
发明人： Bernard L. Lewis , Frank F. Kretschmer, Jr.
IPC分类号： G01S13/524 , H04B1/12 , G01S13/52
CPC分类号： G01S13/5244
摘要： The present invention preprocesses serial data sample sets so that truly ependent samples are available for further processing. Samples to be analyzed are delayed and compared in order to isolate both components that are correlated between samples, and components that are uncorrelated between samples. These components provide independent information relating the samples which are used to modify or preprocess incoming data.
摘要翻译：本发明预处理串行数据样本集，使得真正独立的样本可用于进一步处理。要分析的样品被延迟和比较，以分离样品之间相关的两个成分和样品之间不相关的成分。这些组件提供了与用于修改或预处理传入数据的样本有关的独立信息。

5. 发明授权

US4459700A Adaptive MTI system 失效
标题翻译：自适应MTI系统
公开(公告)号：US4459700A
公开(公告)日：1984-07-10
申请号：US580395
申请日：1975-05-28
申请人： Frank F. Kretschmer, Jr. , Bernard L. Lewis , James P. Hansen
发明人： Frank F. Kretschmer, Jr. , Bernard L. Lewis , James P. Hansen
IPC分类号： G01S13/524 , H04B1/12 , G01S13/52
CPC分类号： G01S13/5244
摘要： An improved technique for eliminating interference in serial data samples ving signal components which are desired to be removed before being further processed. A limited-iterative technique is employed to reduce components of the incoming data samples which are correlated among prior data samples.
摘要翻译：用于消除在进一步处理之前希望被去除的信号分量的串行数据样本中的干扰的改进技术。采用有限迭代技术来减少在现有数据样本之间相关的输入数据样本的分量。

6. 发明授权

US4914442A Adaptive MTI target preservation 失效
标题翻译：自适应MTI目标保存
公开(公告)号：US4914442A
公开(公告)日：1990-04-03
申请号：US304041
申请日：1989-01-30
申请人： Frank F. Kretschmer, Jr. , Bernard L. Lewis
发明人： Frank F. Kretschmer, Jr. , Bernard L. Lewis
IPC分类号： G01S13/524
CPC分类号： G01S13/5244
摘要： A method of preserving targets in the clear in an adaptive baseband MTI radar system with pulse compression is disclosed. The angle of the weighting signal is determined from the inverse tangent of the inphase and quadrature components of the weighting signal. This angle is then compared to a threshold angle in order to generate a modified weighting signal.
摘要翻译：公开了一种在具有脉冲压缩的自适应基带MTI雷达系统中保持清晰目标的方法。加权信号的角度由加权信号的同相和正交分量的反正切确定。然后将该角度与阈值角度进行比较，以便生成修改的加权信号。

7. 发明授权

US4489320A Interference suppressor for radar MTI 失效
标题翻译：雷达MTI的干扰抑制器
公开(公告)号：US4489320A
公开(公告)日：1984-12-18
申请号：US290757
申请日：1981-08-07
申请人： Bernard L. Lewis , Frank F. Kretschmer
发明人： Bernard L. Lewis , Frank F. Kretschmer
IPC分类号： G01S7/292 , G01S13/52 , G01S13/526
CPC分类号： G01S13/52 , G01S13/526 , G01S7/2928
摘要： An impulse interference suppression circuit for use in combination with an-pulse Moving Target Indicator system comprising a gate connected to block the output signal from the MTI system when energized, and a circuit for taking the magnitudes of successive echo return signals, subtracting the magnitudes of consecutive echo signals to remove clutter, comparing the consecutive difference signals from such subtractions against each other, and generating and applying a blocking signal to the gate if the difference between the subtraction difference signals is above a given threshold level.
摘要翻译：一种与N脉冲移动目标指示器系统组合使用的脉冲干扰抑制电路，包括：当被激励时连接到阻塞来自MTI系统的输出信号的栅极，以及用于获取连续回波信号的幅度的电路，的连续回波信号以去除杂波，将来自这种减法的连续差分信号彼此比较，并且如果减法差分信号之间的差异高于给定阈值水平，则产生和施加阻塞信号到门。

8. 发明授权

US4390881A Real-data digital-real-weight canceler 失效
标题翻译：实数数字实体消除器
公开(公告)号：US4390881A
公开(公告)日：1983-06-28
申请号：US386838
申请日：1982-06-09
申请人： Bernard L. Lewis , Frank F. Kretschmer
发明人： Bernard L. Lewis , Frank F. Kretschmer
IPC分类号： G01S7/28 , H04B7/00
CPC分类号： G01S7/2813
摘要： A canceler for decorrelating one set of signal samples called the main setrom another set called the auxiliary set taken from the same domain. It frequency-translates the signals on their intermediate frequency (i.f.) carrier down close to DC using a local oscillator outside one band edge of the signal and samples the resultant signal at a rate equal to twice the information bandwidth or greater and permits using real rather than complex samples. These samples are then converted to digital information in analog-to-digital converters and are processed digitally at a clock rate equal to twice the information bandwidth or greater. The main signal is processed as above but the auxiliary signal is translated down using the same local oscillator signal and, with the same local oscillator signal phase shifted 90.degree. to obtain an inphase and quadrature signal on the same carrier frequency prior to analog-to-digital conversion. Two real weight digital cancelers are used in cascade to cancel components in the main set that are correlated with those in the auxiliary set by canceling first with the inphase and next with the quadrature component of the auxiliary signal.
摘要翻译：消除器，用于将称为主集合的一组信号样本从另一组称为从同一域获取的辅助集合去相关。它使用信号的一个频带边缘外的本地振荡器将其中频（如果）载波频率转换为接近DC的信号，并以等于信息带宽或更高的两倍的速率对结果信号进行采样，并允许使用实际的比复杂的样品。然后将这些样本在模数转换器中转换为数字信息，并以等于信息带宽或更大的两倍的时钟速率进行数字处理。主信号如上所述处理，但辅助信号使用相同的本地振荡器信号进行转换，并且相同的本地振荡器信号相移90°以在相同载波频率之前获得同相和正交信号，数字转换。级联中使用两个实数数字消除器，通过先后同步消除辅助信号的正交分量来消除主组中与辅助组相关的分量。

9. 发明授权

US4384291A Efficient low-sidelobe pulse compression 失效
标题翻译：高效的低旁瓣脉冲压缩
公开(公告)号：US4384291A
公开(公告)日：1983-05-17
申请号：US254311
申请日：1981-04-15
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
CPC分类号： G01S13/286
摘要： A pulse compression system for use with step approximation to linear FM andrank coded signals to eliminate sampling errors and range time grating lobes while providing large pulse compression ratios comprising: a receiving circuit for receiving echo signals, a converting circuit for converting echo signals from the receiver to I and Q baseband signals without clock sampling, a sliding window discrete Fourier Transform or fast Fourier Transform (FFT) circuit including a taped delay line and a plurality of resistor-type phase weighting networks and adders for generating a plurality of output signals representing the different frequency steps in the signals, a delay circuit for differentially delaying the output frequency steps from the sliding window DFT circuit so the the output steps occur simultaneously, and a summer for adding the differentially delayed outputs to yield a short pulse with a peak amplitude when a coded echo pulse is correctly indexed within the delay line of the DFT circuit.
摘要翻译：一种用于逐步逼近线性FM和弗兰克编码信号的脉冲压缩系统，以消除采样误差和范围时间光栅瓣，同时提供大的脉冲压缩比，包括：用于接收回波信号的接收电路，用于将来自接收机到没有时钟采样的I和Q基带信号，包括带通延迟线和多个电阻型相位加权网络的滑动窗离散傅里叶变换或快速傅里叶变换（FFT）电路，用于产生表示信号中的不同频率步长，用于差分地延迟来自滑动窗口DFT电路的输出频率步长的延迟电路，使得输出步骤同时发生，并且用于加法差分延迟输出以产生具有峰值幅度的短脉冲的加法器当编码的回波脉冲在DFT的延迟线内被正确地索引时电路。

10. 发明授权

US4379295A Low sidelobe pulse compressor 失效
标题翻译：低旁瓣脉冲压缩机
公开(公告)号：US4379295A
公开(公告)日：1983-04-05
申请号：US230984
申请日：1981-02-03
申请人： Bernard L. Lewis , Frank F. Kretschmer
发明人： Bernard L. Lewis , Frank F. Kretschmer
IPC分类号： G01S13/28
CPC分类号： G01S13/286
摘要： A pulse compression system based on the transmission of a step approximat to linear FM pulse, and the subsequent processing of echos therefrom by converting the echo pulses to I and Q baseband signals and then sampling these I and Q signals at the Nyquist sampling rate. It has been discovered that this processing yields a signal with a spectrum substantially identical to the spectrum of a properly sampled Frank coded pulse. These sampled I and Q signals are then compressed by a Fast Fourier Transform compressor to yield a pulse with low sidelobes.
摘要翻译：基于对线性FM脉冲的步进近似的传输的脉冲压缩系统，以及通过将回波脉冲转换为I和Q基带信号，然后以奈奎斯特采样率对这些I和Q信号进行采样的随后的回波处理。已经发现，该处理产生具有与正确采样的弗兰克编码脉冲的频谱基本相同的频谱的信号。然后，这些采样的I和Q信号被快速傅立叶变换压缩器压缩以产生具有低旁瓣的脉冲。

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