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1. 发明授权

US06380887B1 Method of reducing clutter and mutual interference in a coherent doppler radar system 有权
标题翻译：减少相干多普勒雷达系统中杂波和相互干扰的方法
公开(公告)号：US06380887B1
公开(公告)日：2002-04-30
申请号：US09520417
申请日：2000-03-08
申请人： Tain-Wen Suen
发明人： Tain-Wen Suen
IPC分类号： G01S1353
CPC分类号： G01S13/532 , G01S7/288 , G01S7/2923 , G01S13/5246
摘要： A method is proposed for use on a coherent Doppler radar system for the purpose of reducing the clutter and mutual interference in the coherent Doppler radar system. The echoed radar signal from the target object is converted into a Range-Doppler Domain output signal. If the Range-Doppler Domain output signal indicates the presence of mutual interference, a Crisscrossing CFAR method is selected to compute for the CFAR back-ground value; otherwise an Area CFAR method is selected. A target-detection logic circuit is then used to obtain the radar information about the target object. By the proposed method, the output signal of the target-detection logic circuit is substantially free from clutter and mutual interference, which is further converted into a radar display signal to drive a radar display unit to display the location and velocity of the target object.
摘要翻译：提出了一种用于相干多普勒雷达系统的方法，用于减少相干多普勒雷达系统中的杂波和相互干扰。来自目标物体的回波雷达信号被转换成范围 - 多普勒域输出信号。如果范围 - 多普勒域输出信号表示存在相互干扰，则选择交叉CFAR方法计算CFAR背景值; 否则选择区域CFAR方法。然后使用目标检测逻辑电路来获得关于目标对象的雷达信息。通过提出的方法，目标检测逻辑电路的输出信号基本上没有杂波和相互干扰，进一步转换为雷达显示信号，以驱动雷达显示单元显示目标对象的位置和速度。

2. 发明授权

US06734820B2 Methods and apparatus for conversion of radar return data 有权
标题翻译：用于转换雷达回波数据的方法和装置
公开(公告)号：US06734820B2
公开(公告)日：2004-05-11
申请号：US10144744
申请日：2002-05-13
申请人： James R. Hager , Jens M. Henrickson , Lavell Jordan , Curtis J. Petrich
发明人： James R. Hager , Jens M. Henrickson , Lavell Jordan , Curtis J. Petrich
IPC分类号： G01S1353
CPC分类号： G01S13/524 , G01S3/48 , G01S7/292 , G01S13/18 , G01S13/20 , G01S13/288 , G01S13/42 , G01S13/70 , G01S13/882 , G01S13/94
摘要： An in-phase/quadrature component (IQ) mixer is configured to reject returns from a negative doppler shift swath in order to mitigate corruption of returns of a positive doppler shift swath. The mixer includes a sample delay element which produces a quadrature component from the in-phase component of an input signal. Further included are a plurality of mixer elements, a plurality of low pass filters, a plurality of decimators, and a plurality of all pass filters which act upon both the in-phase and quadrature components of the input signal. Also, a subtraction element is included which is configured to subtract the filtered and down sampled quadrature component from the filtered and down sampled in-phase component.
摘要翻译：配置同相/正交分量（IQ）混频器以拒绝来自负多普勒频移帧的返回，以便减轻正多普勒频移帧的返回的损坏。混频器包括采样延迟元件，其从输入信号的同相分量产生正交分量。还包括多个混频器元件，多个低通滤波器，多个抽取器和多个全通滤波器，其对输入信号的同相和正交分量起作用。此外，包括减法元件，其被配置为从滤波和下采样的同相分量中减去滤波和下采样的正交分量。

3. 发明授权

US06335701B1 Radar system and coherent integrating method thereof 失效
标题翻译：雷达系统及其相干积分法
公开(公告)号：US06335701B1
公开(公告)日：2002-01-01
申请号：US09649842
申请日：2000-08-28
申请人： Takahiko Fujisaka , Kimio Asaka , Yoshihito Hirano , Shusou Wadaka
发明人： Takahiko Fujisaka , Kimio Asaka , Yoshihito Hirano , Shusou Wadaka
IPC分类号： G01S1353
CPC分类号： G01S7/288 , G01S13/532
摘要： Disclosed is a radar system capable of obviating a problem that a sufficient improvement of an S/N ratio could not be obtained in the prior art, and comprising a transmitter/receiver for detecting a phase of a receiving signal reflected from an observation target, an A/D converter for converting the receiving signal into a digital signal, a range gate for extracting the receiving signal having a time corresponding to the predetermined pulse width, a data dividing unit for dividing the receiving signals in to two groups of data, an FFT unit for fast-Fourier-transforming one group of data of the two groups of data, an FFT unit for fast-Fourier-transforming the other group of data, a complex conjugating unit for taking a complex conjugate of an output of the FFT unit, a complex multiplying unit for performing a complex multiplication for the every same Doppler frequency component with respect to an output of the former FFT unit and an output of the complex conjugating unit, and a complex adder for executing a coherent addition of a result of the complex multiplication the same number of times as the repetitions with respect to the same Doppler frequency component. The receiving signals can be coherently integrated both in the pulse and between the pulses, and the S/N ratio can be improved.
摘要翻译：公开了一种能够消除在现有技术中无法获得S / N比的充分改善的问题的雷达系统，并且包括用于检测从观测目标反射的接收信号的相位的发射机/接收机，用于将接收信号转换为数字信号的A / D转换器，用于提取具有与预定脉冲宽度相对应的时间的接收信号的量程门，用于将接收信号分成两组数据的数据分割单元，FFT 用于对两组数据的一组数据进行快速傅立叶变换的单元，用于对另一组数据进行快速傅立叶变换的FFT单元，用于获取FFT单元的输出的复共轭的复共轭单元，复数乘法单元，用于相对于前一FFT单元的输出和复共轭单元的输出执行针对每个相同的多普勒频率分量的复乘法，以及复共轭加法器，用于执行复数乘法结果的相干相加相同于相同多普勒频率分量的重复次数。接收信号可以在脉冲和脉冲之间相干地集成，并且可以提高S / N比。

4. 发明授权

US06674397B2 Methods and apparatus for minimum computation phase demodulation 有权
标题翻译：用于最小计算相位解调的方法和装置
公开(公告)号：US06674397B2
公开(公告)日：2004-01-06
申请号：US10144871
申请日：2002-05-13
申请人： James R. Hager , Lavell Jordan , Todd R. Burlet , Curtis J. Petrich
发明人： James R. Hager , Lavell Jordan , Todd R. Burlet , Curtis J. Petrich
IPC分类号： G01S1353
CPC分类号： G01S7/292 , G01S3/48 , G01S13/18 , G01S13/20 , G01S13/288 , G01S13/42 , G01S13/524 , G01S13/70 , G01S13/882 , G01S13/94
摘要： A filter, includes a first order band pass filter configured to process non-zero amplitude gated radar return samples and process a portion of received zero amplitude return samples. The filter also calculates past filter outputs based on filter outputs generated during previous non-zero gated radar return samples.
摘要翻译：滤波器包括被配置为处理非零幅度门控雷达返回样本并且处理接收的零幅度返回样本的一部分的第一阶带通滤波器。滤波器还可以根据先前非零门控雷达返回样本中生成的滤波器输出来计算过去的滤波器输出。

5. 发明授权

US06362777B1 Pulse-doppler radar apparatus 有权
标题翻译：脉冲多普勒雷达装置
公开(公告)号：US06362777B1
公开(公告)日：2002-03-26
申请号：US09580219
申请日：2000-05-26
申请人： Kenji Kawakami , Hiroshi Ikematsu
发明人： Kenji Kawakami , Hiroshi Ikematsu
IPC分类号： G01S1353
CPC分类号： G01S13/582 , G01S7/28 , H03D7/16 , H04B1/44
摘要： A Pulse-Doppler radar apparatus is constructed such that an output of an oscillator is divided by a distributor and an on/off switch for generating pulses is coupled to an IF input of a first harmonic mixer, in order to improve precision in measurement of a distance and speed.
摘要翻译：脉冲多普勒雷达装置被构造成使得振荡器的输出由分配器划分，并且用于产生脉冲的开/关开关耦合到第一谐波混频器的IF输入，以便提高测量的精度距离和速度。

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