公开(公告)号：US20090303103A1

公开(公告)日：2009-12-10

申请号：US12134878

申请日：2008-06-06

Applicant: Benjamin J. Winstead ,  Jason I. Formo

Inventor： Benjamin J. Winstead ,  Jason I. Formo

IPC: G01S13/00

CPC classification number: G01S13/882 ,  G01S13/103

Abstract: Methods and systems for reducing a leakage component of a received-signal are disclosed. A transmit antenna of a radar system transmits a transmit-signal including a transmit component. A receive antenna of the radar system receives a received-signal including a leakage component and a target component. The received-signal corresponds to the transmit-signal. An overlap determination is made to determine whether the target component overlaps the leakage component and/or is received during a time when the leakage component is expected to be received. If overlap exists, a reduction leakage component (e.g., a previously determined reduction leakage component) is subtracted from the received-signal so as to produce a modified received-signal, the modified received-signal including the target component and substantially excluding the leakage component. If overlap does not exist, an estimate of the leakage component is produced and a reduction leakage component, based at least in part on the leakage component, is produced.

Abstract translation: 公开了用于减少接收信号的泄漏分量的方法和系统。 雷达系统的发射天线发射包括发射分量的发射信号。 雷达系统的接收天线接收包括泄漏分量和目标分量的接收信号。 接收信号对应于发送信号。 进行重叠确定以确定目标组件是否与泄漏分量重叠和/或在期望接收到泄漏分量的时间期间被接收。 如果存在重叠，则从接收信号中减去减少泄漏分量（例如，先前确定的减小泄漏分量），以便产生经修改的接收信号，修改后的接收信号包括目标分量，并且基本上排除了泄漏分量 。 如果不存在重叠，则产生泄漏分量的估计，并且至少部分地基于泄漏分量产生减少泄漏分量。

公开(公告)号：US07518547B2

公开(公告)日：2009-04-14

申请号：US11778442

申请日：2007-07-16

Applicant: Benjamin J. Winstead

Inventor： Benjamin J. Winstead

IPC: G01S13/08

CPC classification number: G01S13/882 ,  G01S7/34 ,  G01S7/4021 ,  G01S13/18

Abstract: A method of detecting interference noise at a radar altimeter. The method comprises periodically emitting a pulse from the pulsed radar altimeter, periodically detecting a noise level in a noise gate, and determining if the noise level detected during each noise-level-detection period exceeds a noise threshold. The period of emitting the pulse is a pulse repetition interval and the noise gate is offset from other gates in the altimeter. If the noise level detected during a noise-level-detection period is greater than the noise threshold, a counter value is incremented by a selected incremental value for that noise-level-detection period and it is determined if the counter value is greater than a count threshold.

Abstract translation: 一种在雷达高度计上检测干扰噪声的方法。 所述方法包括周期性地从所述脉冲雷达高度计发射脉冲，周期性地检测噪声门中的噪声电平，以及确定在每个噪声电平检测周期期间检测到的噪声电平是否超过噪声阈值。 发射脉冲的周期是脉冲重复间隔，并且噪声门与高度计中的其它门偏移。 如果在噪声电平检测周期期间检测到的噪声电平大于噪声阈值，则对于噪声电平检测周期，计数器值增加选定的增量值，并且确定计数器值是否大于 计数阈值。

公开(公告)号：US20090021418A1

公开(公告)日：2009-01-22

申请号：US11778442

申请日：2007-07-16

Applicant: Benjamin J. Winstead

Inventor： Benjamin J. Winstead

IPC: G01S13/00 ,  G05B13/02

CPC classification number: G01S13/882 ,  G01S7/34 ,  G01S7/4021 ,  G01S13/18

Abstract: A method of detecting interference noise at a radar altimeter. The method comprises periodically emitting a pulse from the pulsed radar altimeter, periodically detecting a noise level in a noise gate, and determining if the noise level detected during each noise-level-detection period exceeds a noise threshold. The period of emitting the pulse is a pulse repetition interval and the noise gate is offset from other gates in the altimeter. If the noise level detected during a noise-level-detection period is greater than the noise threshold, a counter value is incremented by a selected incremental value for that noise-level-detection period and it is determined if the counter value is greater than a count threshold.

Abstract translation: 一种在雷达高度计上检测干扰噪声的方法。 所述方法包括周期性地从所述脉冲雷达高度计发射脉冲，周期性地检测噪声门中的噪声电平，以及确定在每个噪声电平检测周期期间检测到的噪声电平是否超过噪声阈值。 发射脉冲的周期是脉冲重复间隔，并且噪声门与高度计中的其它门偏移。 如果在噪声电平检测周期期间检测到的噪声电平大于噪声阈值，则对于噪声电平检测周期，计数器值增加选定的增量值，并且确定计数器值是否大于 计数阈值。

公开(公告)号：US08532207B2

公开(公告)日：2013-09-10

申请号：US13117407

申请日：2011-05-27

Applicant: Colin S. Hanson ,  Benjamin J. Winstead

Inventor： Colin S. Hanson ,  Benjamin J. Winstead

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04B1/1027 ,  H04L25/03

Abstract: A method for distinguishing a signal of interest from one or more interference signals in a received analog signal comprises receiving an analog signal at a radio front end, and transmitting the received analog signal to an analog-to-digital converter to sample data in the received analog signal and output a digital signal. A sub-channel Fast Fourier Transform (FFT) is performed on the digital signal, and sub-channel FFT bin magnitudes are averaged over a set period of time to determine a shape of the received signal. The shape of the received signal is compared to one or more signal reference patterns by computing a metric for the shape of the received signal, and computing a metric for the one more signal reference patterns. The computed metrics are then compared to a predetermined threshold value to determine the presence, or lack thereof, of a signal of interest in the received signal.

Abstract translation: 用于将感兴趣的信号与接收的模拟信号中的一个或多个干扰信号区分开的方法包括：在无线电前端接收模拟信号，并将所接收的模拟信号发送到模拟 - 数字转换器以对所接收的模拟信号进行采样 模拟信号并输出​​数字信号。 对数字信号执行子信道快速傅里叶变换（FFT），并且在设定的时间段内对子信道FFT bin幅度进行平均以确定接收信号的形状。 通过计算接收信号的形状的度量，以及计算一个以上的信号参考模式的度量，将接收信号的形状与一个或多个信号参考模式进行比较。 然后将所计算的度量与预定阈值进行比较，以确定在接收信号中感兴趣的信号的存在或不存在。

公开(公告)号：US07969350B2

公开(公告)日：2011-06-28

申请号：US12134878

申请日：2008-06-06

Applicant: Benjamin J. Winstead ,  Jason I. Formo

Inventor： Benjamin J. Winstead ,  Jason I. Formo

IPC: G01S7/292 ,  G01S7/40

CPC classification number: G01S13/882 ,  G01S13/103

Abstract: Methods and systems for reducing a leakage component of a received-signal are disclosed. A transmit antenna of a radar system transmits a transmit-signal including a transmit component. A receive antenna of the radar system receives a received-signal including a leakage component and a target component. The received-signal corresponds to the transmit-signal. An overlap determination is made to determine whether the target component overlaps the leakage component and/or is received during a time when the leakage component is expected to be received. If overlap exists, a reduction leakage component (e.g., a previously determined reduction leakage component) is subtracted from the received-signal so as to produce a modified received-signal, the modified received-signal including the target component and substantially excluding the leakage component. If overlap does not exist, an estimate of the leakage component is produced and a reduction leakage component, based at least in part on the leakage component, is produced.

Abstract translation: 公开了用于减少接收信号的泄漏分量的方法和系统。 雷达系统的发射天线发射包括发射分量的发射信号。 雷达系统的接收天线接收包括泄漏分量和目标分量的接收信号。 接收信号对应于发送信号。 进行重叠确定以确定目标组件是否与泄漏分量重叠和/或在期望接收到泄漏分量的时间期间被接收。 如果存在重叠，则从接收信号中减去减少泄漏分量（例如，先前确定的减小泄漏分量），以便产生经修改的接收信号，修改后的接收信号包括目标分量，并且基本上排除了泄漏分量 。 如果不存在重叠，则产生泄漏分量的估计，并且至少部分地基于泄漏分量产生减少泄漏分量。

公开(公告)号：US07629922B2

公开(公告)日：2009-12-08

申请号：US11863487

申请日：2007-09-28

Applicant: Benjamin J. Winstead ,  Jason I. Formo

Inventor： Benjamin J. Winstead ,  Jason I. Formo

IPC: G01S13/00

CPC classification number: G01S13/18 ,  G01S2007/2886

Abstract: A method of obtaining in-phase and quadrature phase components for a narrowband signal is provided. The method includes digitally sampling a narrowband signal at a digital sampling rate to obtain a number of data points. The method subtracts a first portion of the data points corresponding to a first half of one period of the signal from a second portion of the data points corresponding to a second half of the one period of the signal to obtain a number of output data points which is less than the number of data points obtained from sampling the narrowband signal.

Abstract translation: 提供了一种获得窄带信号的同相和正交相分量的方法。 该方法包括以数字采样率数字采样窄带信号以获得多个数据点。 该方法从对应于信号的一个周期的后半部分的数据点的第二部分中减去对应于信号的一个周期的前半段的数据点的第一部分，以获得多个输出数据点， 小于从窄带信号采样获得的数据点的数量。

公开(公告)号：US07911375B2

公开(公告)日：2011-03-22

申请号：US12476682

申请日：2009-06-02

Applicant: Benjamin J. Winstead ,  Thomas W. Heidemann

Inventor： Benjamin J. Winstead ,  Thomas W. Heidemann

IPC: G01S13/08

CPC classification number: G01C5/005 ,  G01S13/585 ,  G01S13/60 ,  G01S13/70 ,  G01S13/882

Abstract: Systems and methods for Doppler beam sharpening in a radar altimeter are provided. In one embodiment, a method comprises receiving a return signal at a radar altimeter receiver and applying a first gate to the return signal to select at least a first component of the return signal. Spectral analysis is performed on the first component of the return signal to generate a plurality of frequency bins, wherein each frequency bin is centered around a different frequency across a Doppler shift frequency spectrum for the first component of the return signal. The method further comprises tracking the first component of the return signal, selecting a first frequency bin of the plurality of frequency bins based on the Doppler shift frequency of the first component of the return signal, and outputting a portion of the first component of the return signal falling within the first frequency bin for further processing.

Abstract translation: 提供雷达高度计中多普勒波束锐化的系统和方法。 在一个实施例中，一种方法包括在雷达高度计接收器处接收返回信号，并向返回信号施加第一门以选择返回信号的至少第一分量。 对返回信号的第一分量执行频谱分析以产生多个频率仓，其中每个频率仓以用于返回信号的第一分量的多普勒频移频谱为中心。 该方法还包括跟踪返回信号的第一分量，基于返回信号的第一分量的多普勒频移选择多个频率仓的第一频率仓，并输出返回信号的第一分量的一部分 信号落在第一频率仓内，用于进一步处理。

公开(公告)号：US20090066559A1

公开(公告)日：2009-03-12

申请号：US11851038

申请日：2007-09-06

Applicant: Benjamin J. Winstead

Inventor： Benjamin J. Winstead

IPC: G01S13/00

CPC classification number: G01S7/2922 ,  G01S7/023 ,  G01S7/2923 ,  G01S13/882

Abstract: A false lock filter circuit for a pulsed altimeter is provided. The circuit includes a low pass filter having a relatively low bandwidth (LBW LPF), a low pass filter having a relatively high bandwidth (HBW LPF) and a false lock controller. The LBW LPF has an input that is coupled to receive a detector output. The HBW LPF has an input that is coupled to receive the detector output. The false lock controller is coupled to receive outputs from the LBW LPF and HBW LPF. Moreover, the false lock controller is configured to sample an output of the HBW LPF and apply a statistical analysis on the samples to determine if a valid target has been detected.

Abstract translation: 提供了用于脉冲高度计的假锁滤波器电路。 电路包括具有相对低带宽（LBW LPF）的低通滤波器，具有相对高带宽的低通滤波器（HBW LPF）和假锁定控制器。 LBW LPF具有耦合以接收检测器输出的输入。 HBW LPF具有耦合以接收检测器输出的输入。 虚拟锁定控制器被耦合以接收来自LBW LPF和HBW LPF的输出。 此外，假锁控制器被配置为对HBW LPF的输出进行采样，并对样本应用统计分析，以确定是否检测到有效目标。

公开(公告)号：US20070273572A1

公开(公告)日：2007-11-29

申请号：US11420574

申请日：2006-05-26

Applicant: Steven H. Thomas ,  Timothy J. Reilly ,  Benjamin J. Winstead

Inventor： Steven H. Thomas ,  Timothy J. Reilly ,  Benjamin J. Winstead

IPC: G01S13/08

CPC classification number: G01S13/882 ,  F42C13/042 ,  G01S13/60

Abstract: A radar sensor is described that includes a radar transmitter, a radar receiver configured to receive reflected returns of signals output by the radar transmitter, and a signal processing unit configured to process signals received by the radar receiver. The signal processing unit includes a comparator, a first filter comprising an output coupled to a reference input of the comparator, and a second filter comprising an output coupled to a signal input of the comparator. The first and second filters are configured to receive a common input related to the reflected returns. The first filter is configured to have a time constant such that a rise time of the first filter output is faster than a rise time of the second filter output.

Abstract translation: 描述了雷达传感器，其包括雷达发射器，被配置为接收由雷达发射器输出的信号的反射返回的雷达接收器，以及被配置为处理由雷达接收器接收的信号的信号处理单元。 信号处理单元包括比较器，第一滤波器，包括耦合到比较器的参考输入端的输出端，第二滤波器包括耦合到比较器的信号输入端的输出端。 第一和第二滤波器被配置为接收与反射的返回相关的公共输入。 第一滤波器被配置为具有时间常数，使得第一滤波器输出的上升时间比第二滤波器输出的上升时间快。