会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Method for improving monopulse processing of aperture segment outputs
    • 改进孔径段输出单脉冲处理的方法
    • US5986605A
    • 1999-11-16
    • US56070
    • 1998-04-06
    • Leslie A. PriebeJerry D. Holmes
    • Leslie A. PriebeJerry D. Holmes
    • G01S3/32G01S13/44G01S5/02
    • G01S3/32G01S13/44G01S13/4418
    • A system and method for estimating azimuth angle, elevation angle and signal detection and which includes an antenna system having a plurality of elements, each element receiving a different concurrent portion of an incoming analog signal having a real and an imaginary portion. A converter is provided for each antenna element for converting each analog signal to digital form. A processor is provide for multiplying the sum of the real parts of the signals from a first group of the elements with the conjugate of the sum of the remainder of the elements to provided an estimated azimuth, elevation of signal detection measurement. In the case of a four element antenna, AzEst=Angle((A+B)*(C+D)Conjugate))=(x.sub.A +iy.sub.A +x.sub.B +iy.sub.B)*(x.sub.C -iy.sub.C +x.sub.D -iy.sub.D), ElEst=Angle((A+D)*(B+C)Conjugate))=(x.sub.A +iy.sub.A +x.sub.D +iy.sub.D)*(x.sub.B -iy.sub.B +x.sub.C -iy.sub.C) and Magnitude ((A+B*(C+D)Conjugate)) or Magnitude ((A+D*(B+C)Conjugate)). When the antenna system includes four antenna quadrants A, B, C and D, false detections due to responses coming from the sidelobe regions are suppressed by subtracting the offset OffsetAz=ScaleFactor*Magnitude(DeltaAz), where the offset is a scale factor to make the numbers come out correctly to provide a synthetic beam response: SyntheticAz=Magnitude((A+B)*(C+D)Conjugate)-OffsetAz the processor further including a comparator for comparing the Synthetic Az to a threshold to determine validity of the signal.
    • 一种用于估计方位角,仰角和信号检测的系统和方法,其包括具有多个元件的天线系统,每个元件接收具有实部和虚部的输入模拟信号的不同部分。 为每个天线元件提供A转换器,用于将每个模拟信号转换为数字形式。 提供一种处理器,用于将来自第一组元件的信号的实部的总和与元素的其余部分的和的共轭相乘以提供估计的方位角,信号检测测量的仰角。 在四元天线的情况下,AzEst = Angle((A + B)*(C + D)共轭))=(xA + iyA + xB + iyB)*(xC-iyC + xD-iyD),ElEst = 角度((A + D)*(B + C)共轭体))=(xA + iyA + xD + iyD)*(xB-iyB + xC-iyC)和幅度((A + B *(C + D) ))或Magnitude((A + D *(B + C)缀合物))。 当天线系统包括四个天线象限A,B,C和D时,通过减去偏移OffsetAz = ScaleFactor * Magnitude(DeltaAz)来抑制由于来自旁瓣区域的响应而导致的错误检测,其中偏移量是使比例因子 数字正确地出现以提供合成波束响应:SyntheticAz =幅度((A + B)*(C + D)共轭)) - 处理器还包括用于将合成Az与阈值进行比较的比较器,以确定 信号。
    • 4. 发明授权
    • Digital processing method for parameter estimation of synchronous,
asynchronous, coherent or non-coherent signals
    • 用于同步,异步,相干或非相干信号参数估计的数字处理方法
    • US5565764A
    • 1996-10-15
    • US435685
    • 1995-05-05
    • Leslie A. PriebeMichael C. StephensWilliam D. Daniels
    • Leslie A. PriebeMichael C. StephensWilliam D. Daniels
    • G01R23/16G01S7/02
    • G01R23/16G01S7/021
    • The parameters of a digital signal are extracted by the application of autocorrelation and crosscorrelation techniques to effectively measure the frequency and time behavior of a digital signal. The method employs digital autocorrelation and crosscorrelation to determine these parameters. Autocorrelation allows the measurement of signal frequency by measurement of instantaneous signal phase. Crosscorrelation allows measurement of relative phase between two or more signals in two or more channels by measurement of instantaneous phase and by referencing the instantaneous phase to the autocorrelation function. The autocorrelation function and crosscorrelation function preserve relative amplitude and phase. Measurement of relative amplitude and phase allows direction finding calculation for any current class of system that uses amplitude and/or phase to derive angle or arrival. Signal time and frequency measurement at the output of a correlation receiver result in robust characterization of the parameters of the signal. Digital calculations are superior to current analog or hybrid analog and digital methods because errors due to component aging, drift and temperature effects are easily prevented.
    • 通过应用自相关和互相关技术提取数字信号的参数,以有效测量数字信号的频率和时间行为。 该方法采用数字自相关和互相关来确定这些参数。 自相关允许通过测量瞬时信号相位来测量信号频率。 互相关允许通过测量瞬时相位并通过参考与自相关函数的瞬时相位来测量两个或更多个通道中的两个或更多个信号之间的相对相位。 自相关函数和相关函数保存相对幅度和相位。 相对幅度和相位的测量允许使用振幅和/或相位导出角度或到达的任何当前类别的系统的方向测量计算。 在相关接收机的输出端的信号时间和频率测量结果可以显着地描述信号的参数。 数字计算优于当前的模拟或混合模拟和数字方法,因为易于防止由于组件老化,漂移和温度影响引起的错误。