公开(公告)号：US20160209494A1

公开(公告)日：2016-07-21

申请号：US14703038

申请日：2015-05-04

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Gregory J. Mazzaro ,  Kyle A. Gallagher

IPC: G01S7/40

CPC classification number: G01S7/032 ,  G01S7/038 ,  G01S7/282 ,  G01S7/35

Abstract: A novel methodology for automatically linearizing a harmonic radar transmitter—termed Feed-Forward Filter Reflection (FFFR)—is disclosed. The method combines the reflected second harmonic from a filter with the signal passing directly through the filter. The second harmonic from these two paths are combined with equal and opposite amplitudes to reduce the second harmonic beyond filtering alone. This methodology has been experimentally verified at transmit frequencies between 800 and 1000 MHz. Implemented properly, the technique provides greater than 100 dB rejection between 1.6 and 2.0 GHz. Although the tuning has been automated, further optimization is possible. Automated tuning is demonstrated over 400 MHz of bandwidth with a minimum cancellation of 110 dB. One application for the harmonic cancellation is to create a linear radar transmitter for the remote detection of non-linear targets.

Abstract translation: 公开了一种用于自动线性化谐波雷达发射机 - 称为前馈滤波器反射（FFFR）的新颖方法。 该方法将来自滤波器的反射二次谐波与直接通过滤波器的信号相结合。 来自这两个路径的二次谐波与相等和相反的幅度相结合，以减少除了单独过滤以外的二次谐波。 这种方法已经在800和1000 MHz之间的发射频率上进行了实验验证。 该技术实现正确，在1.6和2.0 GHz之间提供大于100 dB的抑制。 虽然调整已经自动化，但是进一步的优化是可能的。 在400 MHz带宽上演示自动调谐，最小取消为110 dB。 用于谐波消除的一个应用是创建用于非线性目标的远程检测的线性雷达发射机。

公开(公告)号：US10234543B2

公开(公告)日：2019-03-19

申请号：US15133276

申请日：2016-04-20

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Gregory J. Mazzaro ,  Kyle A. Gallagher ,  Kenneth I. Ranney ,  Anthony F. Martone

IPC: G01S13/88 ,  G01S7/41 ,  G01S7/35 ,  G01S13/32 ,  G01S13/02

Abstract: Embodiments of the present invention concern locating targets using non-linear radar with a matched filter which uses exponential value of the transmit signal. According to embodiments, a method of non-linear radar target location includes: transmitting a signal of a transmit waveform towards a target; receiving a signal from the target; creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and applying the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest. In other embodiments, the matched filtering may be combined with sidelobe reduction.

公开(公告)号：US10203405B2

公开(公告)日：2019-02-12

申请号：US15093788

申请日：2016-04-08

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Gregory J. Mazzaro ,  Kenneth I. Ranney ,  Kyle A. Gallagher ,  Anthony F. Martone

IPC: G01S13/10 ,  G01S7/41 ,  G01S13/88 ,  G01S7/292

Abstract: Method for determining distance to target using a multitone nonlinear radar system comprising providing a transmitter that transmits a signal comprising at least two predetermined frequency components; receiving transmitted signal upon reflection from target; determining the phase relationships of the frequency components when signal strikes target; determining distance the signal has travelled to target based upon the phase relationship of the frequency signal components at the time of reflection from target; computing the distance to target. A system comprising a transmitter subsystem that transmits radar signal comprising at least two frequency components; a receiver subsystem configured to receive a return signal comprising intermodulation and harmonic products; at least one processor configured to extract frequency samples from the return signal within a frequency range, apply a window function to the extracted frequency samples and perform an inverse fast Fourier transform on the resulting function to create a range profile.

公开(公告)号：US20170307726A1

公开(公告)日：2017-10-26

申请号：US15133276

申请日：2016-04-20

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Gregory J. Mazzaro ,  Kyle A. Gallagher ,  Kenneth I. Ranney ,  Anthony F. Martone

IPC: G01S7/292 ,  G01S7/41

CPC classification number: G01S7/414 ,  G01S7/354 ,  G01S13/0209 ,  G01S13/32

Abstract: Embodiments of the present invention concern locating targets using non-linear radar with a matched filter which uses exponential value of the transmit signal. According to embodiments, a method of non-linear radar target location includes: transmitting a signal of a transmit waveform towards a target; receiving a signal from the target; creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and applying the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest. In other embodiments, the matched filtering may be combined with sidelobe reduction.

公开(公告)号：US20160282457A1

公开(公告)日：2016-09-29

申请号：US15093788

申请日：2016-04-08

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Gregory J. Mazzaro ,  Kenneth I. Ranney ,  Kyle A. Gallagher ,  Anthony F. Martone

IPC: G01S13/10 ,  G01S7/28

CPC classification number: G01S13/106 ,  G01S7/292 ,  G01S7/414 ,  G01S13/103 ,  G01S13/887

Abstract: Method for determining distance to target using a multitone nonlinear radar system comprising providing a transmitter that transmits a signal comprising at least two predetermined frequency components; receiving transmitted signal upon reflection from target; determining the phase relationships of the frequency components when signal strikes target; determining distance the signal has travelled to target based upon the phase relationship of the frequency signal components at the time of reflection from target; computing the distance to target. A system comprising a transmitter subsystem that transmits radar signal comprising at least two frequency components; a receiver subsystem configured to receive a return signal comprising intermodulation and harmonic products; at least one processor configured to extract frequency samples from the return signal within a frequency range, apply a window function to the extracted frequency samples and perform an inverse fast Fourier transform on the resulting function to create a range profile.

Abstract translation: 用于使用多音非线性雷达系统确定与目标的距离的方法，包括提供发送包括至少两个预定频率分量的信号的发射机; 从目标反射时接收发射信号; 确定信号目标时频率分量的相位关系; 基于来自目标的反射时的频率信号分量的相位关系，确定信号已经行进到目标的距离; 计算到目标的距离。 一种系统，包括发送子系统，所述发射机子系统发送包括至少两个频率分量的雷 接收器子系统，被配置为接收包括互调和谐波乘积的返回信号; 至少一个处理器被配置为在频率范围内从返回信号中提取频率样本，对所提取的频率样本应用窗口函数，并对所得到的函数执行快速傅立叶逆变换以创建范围分布。