公开(公告)号：US20160238696A1

公开(公告)日：2016-08-18

申请号：US15017638

申请日：2016-02-07

Applicant: Kenneth J. Hintz

Inventor： Kenneth J. Hintz

IPC: G01S7/41

CPC classification number: G01S7/414 ,  G01S7/2923 ,  G01S7/2926 ,  G01S7/42 ,  G01S13/003 ,  G01S13/0209 ,  G01S13/48 ,  G01S13/88 ,  G01S2013/0281

Abstract: An apparatus for detecting a dispersive object in non-dispersive clutter comprising a multi-frequency radar, a signal processor which computes the elapsed time between when each frequency is transmitted and that same frequency is received and the dispersion statistics related to the several frequencies. A dispersion analyzer produces a dispersive object discrimination value which is compared with a threshold by which a detection is declared. The apparatus also utilizes dispersion statistics to differentiate between dispersive and non-dispersive radar returns in order to reject the non-dispersive signals and pass the dispersive signals to a signal integrator which increases the signal-to-clutter ratio thereby improving the probability of detection of subsequent target detection processes.

Abstract translation: 一种用于检测包括多频雷达的非分散杂波中的分散对象的装置，计算发送每个频率和接收相同频率之间经过的时间的信号处理器以及与多个频率有关的色散统计。 色散分析仪产生与声明检测的阈值进行比较的色散对象鉴别值。 该装置还利用色散统计来区分色散和非色散雷达返回，以便拒绝非色散信号，并将色散信号传递到信号积分器，信号积分器增加信噪比，从而提高检测的可能性 随后的目标检测过程。

公开(公告)号：US07573419B2

公开(公告)日：2009-08-11

申请号：US10557466

申请日：2003-05-21

Applicant: Kent Olof Falk

Inventor： Kent Olof Falk

IPC: G01S13/00

CPC classification number: H01Q21/205 ,  G01S7/2813 ,  G01S13/0209 ,  G01S2013/0281 ,  H01Q21/08 ,  H01Q21/28

Abstract: The present inventive concept for bistatic or monostatic radar utilization discloses a method and a system for unambiguous angle resolution of a sparse wide-band array antenna by utilizing an ultra wide-band signal, generally a wide-band noise signal which may be continuous bandwidth limited white or colored noise. The noise signal is typically generated and radiated by a transmitting antenna covering the entire reception range of a receiving sparse antenna array. An echo signal is received by the sparse receiving array containing n antenna elements, which are generally positioned with separation distances of several wavelengths without creating strong grating lobes due to the type of generated transmit signal. By means of a selected auto-correlation function defining the wide-band noise signal power spectrum, the convolution of the radiated output signal and the received echo input signal will give the target range information, the individual time-delay setting for each antenna element will give an unambiguous angular resolution.

Abstract translation: 本发明的双基地或单稳态雷达利用的概念公开了一种通过利用超宽带信号（通常可以是连续带宽限制的宽带噪声信号）来简化稀疏宽带阵列天线的明确角度分辨率的方法和系统 白色或彩色噪音。 噪声信号通常由覆盖接收稀疏天线阵列的整个接收范围的发射天线产生和辐射。 由包含n个天线元件的稀疏接收阵列接收回波信号，这些天线元件通常以几个波长的分离距离定位，而不会由于所产生的发射信号的类型而产生强的光栅。 通过定义宽带噪声信号功率谱的选定的自相关函数，辐射输出信号与接收到的回波输入信号的卷积将给出目标范围信息，每个天线元件的各个时间延迟设置将 给出明确的角分辨率。

公开(公告)号：US06917327B2

公开(公告)日：2005-07-12

申请号：US10385814

申请日：2003-03-11

Applicant: Alan Jenkins

Inventor： Alan Jenkins

IPC: G01S7/36 ,  G01S13/02 ,  G01S13/26 ,  G01S13/28 ,  G01S13/00 ,  G01S13/08

CPC classification number: G01S7/023 ,  G01S7/36 ,  G01S13/26 ,  G01S13/288 ,  G01S2013/0281

Abstract: A method for transmitting a radar signal comprises the step of transmitting a series of pulses, each of the pulses being separated in time by an interpulse period, and each of the pulses in the series being modulated in accordance with a different character of a first code

Abstract translation: 用于发送雷达信号的方法包括发送一系列脉冲的步骤，每个脉冲在时间上被分离脉冲周期，并且该系列中的每个脉冲根据第一代码的不同字符进行调制

公开(公告)号：US06388604B1

公开(公告)日：2002-05-14

申请号：US09597481

申请日：2000-06-19

Applicant: Jim P. Y. Lee

Inventor： Jim P. Y. Lee

IPC: G01S736

CPC classification number: G01S7/021 ,  G01S3/46 ,  G01S7/2926 ,  G01S2013/0281

Abstract: A pulse Low Probability of Intercept (LPI) signal discriminator has a soft-limiting IF amplifier chain for receiving an IF signal to soft-limit any high-peak IF signals in the IF signal and a high-peak amplitude compressive circuit followed by an integrator which integrates the signal over a predetermined time to produce a high output when a LPI signal is present. The integrator is connected to a threshold detector which outputs a trigger signal when a high output from the integrator is received. In a receiver having a plurality of channels for received signals from a number of antenna, one channel for each antenna, the received signals are down converted to IF signals and applied to analog-to-digital converters (ADCs) which are connected to a digital processor. A pulse/LPI signal discriminator is connected to a channel to receive an IF signal from an associated down converter and produce a trigger pulse when a LPI signal is present which will gate signals from buffer memories connected to ADCs to the digital processor if an LPI signal is detected.

Abstract translation: 截止（LPI）信号鉴别器的脉冲低概率具有用于接收IF信号的软限幅IF放大器链，以软限制IF信号中的任何高峰IF信号和高峰值振幅压缩电路，随后是积分器 其在预定时间内对信号进行积分，以在存在LPI信号时产生高输出。 积分器连接到阈值检测器，当接收到来自积分器的高输出时，该阈值检测器输出触发信号。 在具有用于来自多个天线的接收信号的多个信道的接收机中，每个天线的一个信道，所接收的信号被下变频为IF信号并且被施加到模数转换器（ADC），其连接到数字 处理器。 脉冲/ LPI信号鉴频器连接到通道以从相关联的下变频器接收IF信号，并且当存在LPI信号时产生触发脉冲，如果LPI信号将连接到ADC的缓冲存储器将门信号传送到数字处理器 被检测到。

公开(公告)号：US20010015699A1

公开(公告)日：2001-08-23

申请号：US09748421

申请日：2000-12-26

Inventor： William H. Chiles ,  Kenneth Raymond Moser

IPC: G01S013/26

CPC classification number: G01S13/18 ,  G01S7/03 ,  G01S7/4008 ,  G01S7/4052 ,  G01S13/288 ,  G01S13/582 ,  G01S13/882 ,  G01S2007/4065 ,  G01S2013/0281

Abstract: A random signal radar unit transmits a variable signal modulated by random noise (at 41). The return signal from the target area is correlated (at 61) with a sample of the transmitted signal, effectively compressing the spread spectrum waveform into a narrow band signal. The result is a covert high resolution radar which can be instrumented to operate in a number of single-or multi-mode configurations. By randomly varying biphase modulation (at 41, 35) and by down beating (at 49) the echo signal with the modulation delayed by a time equivalent to that of a leakage delay, a random signal is produced (at 35, 39) in which leakage return signals are readily filtered (at 53, 59).

Abstract translation: 随机信号雷达单元发送由随机噪声调制的可变信号（在41）。 来自目标区域的返回信号与发射信号的样本相关（在61处），将扩频波形有效地压缩成窄带信号。 结果是一种隐蔽的高分辨率雷达，可以在多种单模或多模式配置下进行操作。 通过随机改变双相调制（在41,35）和通过下降（在49处）使调制延迟了与泄漏延迟相等的时间的回波信号，产生随机信号（在35,39），其中 泄漏返回信号容易过滤（在53,59）。

公开(公告)号：US5898401A

公开(公告)日：1999-04-27

申请号：US211270

申请日：1988-06-09

Applicant: Raymond John Walls

Inventor： Raymond John Walls

IPC: G01S7/02 ,  G01S7/03 ,  G01S7/282 ,  G01S7/288 ,  G01S7/40 ,  G01S7/41 ,  G01S13/02 ,  G01S13/10 ,  G01S13/32 ,  G01S13/34 ,  G01S13/88

CPC classification number: G01S13/325 ,  G01S13/106 ,  G01S13/346 ,  G01S13/882 ,  G01S2007/2886 ,  G01S2013/0281 ,  G01S7/038 ,  G01S7/282 ,  G01S7/4008 ,  G01S7/41

Abstract: A continuous wave radar altimeter comprises a pulsed power control (4), operable when the signal-to-noise ratio of the received signal is likely to be too low, to pulse the transmitted power so that the power varies between a non-zero base level and a higher level. The receiver channel (13, 14) is switched off during each transmitted pulse.

Abstract translation: 连续波雷达高度计包括脉冲功率控制（4），当接收信号的信噪比可能太低时可操作，以脉冲发射功率，使得功率在非零基极 水平和更高的水平。 在每个发送的脉冲期间，接收器通道（13,14）被关断。

公开(公告)号：US5861834A

公开(公告)日：1999-01-19

申请号：US24003

申请日：1998-02-14

Applicant: Mark F. Sauer ,  Larry R. Kremer ,  John A. Ziegler

Inventor： Mark F. Sauer ,  Larry R. Kremer ,  John A. Ziegler

IPC: G01S7/282 ,  G01S7/285 ,  G01S7/35 ,  G01S7/36 ,  G01S13/02 ,  G01S13/22 ,  G01S13/32 ,  G01S13/44 ,  G01S7/38

CPC classification number: G01S13/222 ,  G01S13/32 ,  G01S7/36 ,  G01S13/44 ,  G01S2013/0281 ,  G01S7/282 ,  G01S7/285 ,  G01S7/35

Abstract: Apparatus (10) for generating a radar waveform (W). A noise generator (20) generates a series of pulses in a pseudo-random pattern, and a frequency generator (16) generates a carrier wave having a frequency within a predetermined band of frequencies. The carrier wave is modulated with the pseudo-random pattern of pulses, and the resulting modulated carrier wave passed through both a filter (30) and an attenuator (32) to suppress any discernible feature or signal characteristics of the resulting waveform. The modulated carrier is transmitted by an antenna (42) and a received return signal is processed by a signal processor (100) to obtain pertinent information about a target. The transmitted waveform has no discernible attributes by which the waveform, if processed and analyzed by someone else's radar detector (E) would convey any intelligence as to the presence or source of the transmitted waveform.

Abstract translation: 用于产生雷达波形（W）的装置（10）。 噪声发生器（20）以伪随机模式产生一系列脉冲，并且频率发生器（16）产生具有预定频带范围内的频率的载波。 载波以脉冲的伪随机模式进行调制，所得到的调制载波通过滤波器（30）和衰减器（32），以抑制所得波形的任何可辨别的特征或信号特性。 调制载波由天线（42）传输，并且接收的返回信号由信号处理器（100）处理以获得关于目标的相关信息。 传输的波形没有明确的属性，通过该属性波形，如果由其他人的雷达检测器（E）进行处理和分析，则将传达关于发送波形的存在或来源的任何智能。

公开(公告)号：US5731782A

公开(公告)日：1998-03-24

申请号：US489933

申请日：1990-02-27

Applicant: Raymond John Walls

Inventor： Raymond John Walls

IPC: G01S7/35 ,  G01S13/02 ,  G01S13/32 ,  G01S13/42 ,  G01S13/88 ,  G01S13/94

CPC classification number: G01S13/94 ,  G01S13/325 ,  G01S13/42 ,  G01S13/882 ,  G01S2013/0281 ,  G01S7/35

Abstract: A continuous wave ranging system comprises a modulator for modulating an r.f. carrier signal in accordance with a pseudo random code, a transmitting antenna for radiating the signal towards a target, a receiving antenna and receiver for detecting the signal reflected from the target, a correlator for correlating the detected signal with the transmitted code with a selected phase shift corresponding to the current range gate to be tested, whereby the range of the target from the system may be determined, and filtering means for filtering from the output of the correlator those range gate amplitudes which vary with a frequency less than a predetermined value.

Abstract translation: 连续波测距系统包括用于调制r.f的调制器。 根据伪随机码的载波信号，用于向目标发射信号的发射天线，用于检测从目标反射的信号的接收天线和接收机，用于将检测到的信号与所选发射码相关的相关器 对应于要测试的电流范围门限的移位，从而可以确定来自系统的目标的范围;以及滤波装置，用于从相关器的输出中滤除以小于预定值的频率变化的范围门幅度。

公开(公告)号：US11652680B1

公开(公告)日：2023-05-16

申请号：US17346935

申请日：2021-06-14

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Matthew J. Sherman ,  Bassem Scander

IPC: H04L27/26 ,  G01S13/02

CPC classification number: H04L27/2663 ,  H04L27/26524 ,  G01S2013/0281

Abstract: A wideband chaotic waveform that is rateless in that it may be modulated at virtually any rate and has a minimum of features introduced into the waveform. Further, the waveform provided may be operated below a signal to noise ratio wall to further enhance the LPD and LPE aspects, thereof. Additionally, the present disclosure may provide a mix of coherent and non-coherent processing techniques applied to signal samples to efficiently achieve coarse synchronization with a waveform that is faster, more efficient and more accurate than using time domain signal correlators alone.

公开(公告)号：US09664778B2

公开(公告)日：2017-05-30

申请号：US14382513

申请日：2013-02-28

Applicant: THALES

Inventor： Pascal Cornic ,  Stephane Kemkemian ,  Jean-Paul Artis

IPC: G01S7/282 ,  G01S7/35 ,  G01S13/34 ,  G01S13/90 ,  G01S13/02

CPC classification number: G01S7/35 ,  G01S13/02 ,  G01S13/343 ,  G01S13/9035 ,  G01S2013/0281

Abstract: A radar and method for making a radar undetectable, comprising comprises: on a transmit antenna consisting of N individual subarrays that are non-directional in at least one plane in transmission, each being linked to a waveform generator, generating, for each of the individual subarrays, a waveform so as to make each of the individual subarrays transmit continuous or quasi-continuous signals according to a temporal and periodic pattern by using transmission patterns made up of N different subarrays and which are deduced from one another by an individual delay, on the receive antenna comprising M individual subarrays adapted to pick up the reflected signals obtained from the transmission of the N individual subarrays of the transmit antenna, performing a compression of the received signal in space and in time of the received signals.