公开(公告)号：WO1996024858A1

公开(公告)日：1996-08-15

申请号：PCT/US1996001492

申请日：1996-02-01

Applicant: ALLIEDSIGNAL INC.

Inventor： ALLIEDSIGNAL INC. ,  BRANDAO, Ruy, L. ,  MANSEUR, Arezki ,  SPIRES, Randall, C. ,  WEIST, William, C. ,  HERMANN, Philip, R.

IPC: G01S07/292

CPC classification number: G01S13/951 ,  G01S7/292 ,  G01S13/524 ,  G01S13/585 ,  G01S2007/2883 ,  G01S2007/2886 ,  Y02A90/18

Abstract: A method for removing clutter related frequency components from power spectrums generated from weather radar return signals to provide improved windshear detection capability. Weather radar return signals are synchronously detected and digitized to provide i and q time domain sample sequences. The i and q time domain sample sequences are passed through a window function and then transformed to frequency domain sequences by a Fast Fourier Transform. A power spectrum is generated from the frequency domain sequences. The spectrum is subjected to a Spectral Gaussian Envelope Discrimination (SGED) process in which the spectral envelope is scanned to identify any lobe therein having a slope greater than a predetermined minimum. A first pseudo-Gaussian sigma, calculated from the width and maximum amplitude of any such lobe, is compared with a second pseudo-Gaussian sigma, calculated from known conditions. If the first sigma is less than the second sigma, the lobe is deemed to be clutter related and is edited from the spectral envelope.

Abstract translation: 一种用于从天气雷达返回信号产生的功率谱中去除杂波相关频率分量的方法，以提供改进的风切变检测能力。 天气雷达返回信号被同步检测和数字化，以提供i和q时域采样序列。 i和q时域样本序列通过窗口函数，然后通过快速傅里叶变换转换到频域序列。 从频域序列产生功率谱。 频谱经受光谱高斯包络鉴别（SGED）处理，其中扫描频谱包络以识别其中具有大于预定最小值的斜率的任何波瓣。 从任何这样的波瓣的宽度和最大幅度计算的第一伪高斯西格玛与从已知条件计算的第二伪高斯西格玛进行比较。 如果第一个西格玛小于第二个西格玛，则波瓣被认为是杂波相关的，并且从频谱包络中进行编辑。

公开(公告)号：EP0808463A1

公开(公告)日：1997-11-26

申请号：EP96909476.0

申请日：1996-02-01

Applicant: AlliedSignal Inc.

Inventor： BRANDAO, Ruy, L. ,  MANSEUR, Arezki ,  SPIRES, Randall, C. ,  WEIST, William, C. ,  HERMANN, Philip, R.

IPC: G01S13 ,  G01S7

CPC classification number: G01S13/951 ,  G01S7/292 ,  G01S13/524 ,  G01S13/585 ,  G01S2007/2883 ,  G01S2007/2886 ,  Y02A90/18

Abstract: A method for removing clutter related frequency components from power spectrums generated from weather radar return signals to provide improved windshear detection capability. Weather radar return signals are synchronously detected and digitized to provide i and q time domain sample sequences. The i and q time domain sample sequences are passed through a window function and then transformed to frequency domain sequences by a Fast Fourier Transform. A power spectrum is generated from the frequency domain sequences. The spectrum is subjected to a Spectral Gaussian Envelope Discrimination (SGED) process in which the spectral envelope is scanned to identify any lobe therein having a slope greater than a predetermined minimum. A first pseudo-Gaussian sigma, calculated from the width and maximum amplitude of any such lobe, is compared with a second pseudo-Gaussian sigma, calculated from known conditions. If the first sigma is less than the second sigma, the lobe is deemed to be clutter related and is edited from the spectral envelope.

公开(公告)号：EP0404833B1

公开(公告)日：1994-09-14

申请号：EP89904441.6

申请日：1989-03-16

Applicant: AlliedSignal Inc.

Inventor： BRANDAO,Ruy,L. ,  SPIRES, Randall, C. ,  KYRIAKOS, Constantinos, S. ,  JUGS, Andrejs

IPC: G01S3/02 ,  G01S13/93

CPC classification number: G01S13/9303

Abstract: A direction finding receiving system for use on a protected aircraft in which a signal from an ATCRABS transponder on an intruder aircraft is received has been described incorporating a four element interferometer type antenna array, reversing switches, individual receivers, a phase detector and a processor for processing the outputs of the phase detector. The invention overcomes the problem of correcting for the difference in phase delay of signals passing through the receivers.

公开(公告)号：EP0808463B1

公开(公告)日：2000-05-31

申请号：EP96909476.2

申请日：1996-02-01

Applicant: AlliedSignal Inc.

Inventor： BRANDAO, Ruy, L. ,  MANSEUR, Arezki ,  SPIRES, Randall, C. ,  WEIST, William, C. ,  HERMANN, Philip, R.

IPC: G01S7/292 ,  G01S13/95

CPC classification number: G01S13/951 ,  G01S7/292 ,  G01S13/524 ,  G01S13/585 ,  G01S2007/2883 ,  G01S2007/2886 ,  Y02A90/18

Abstract: A method for removing clutter related frequency components from power spectrums generated from weather radar return signals to provide improved windshear detection capability. Weather radar return signals are synchronously detected and digitized to provide i and q time domain sample sequences. The i and q time domain sample sequences are passed through a window function and then transformed to frequency domain sequences by a Fast Fourier Transform. A power spectrum is generated from the frequency domain sequences. The spectrum is subjected to a Spectral Gaussian Envelope Discrimination (SGED) process in which the spectral envelope is scanned to identify any lobe therein having a slope greater than a predetermined minimum. A first pseudo-Gaussian sigma, calculated from the width and maximum amplitude of any such lobe, is compared with a second pseudo-Gaussian sigma, calculated from known conditions. If the first sigma is less than the second sigma, the lobe is deemed to be clutter related and is edited from the spectral envelope.

公开(公告)号：EP0404833A1

公开(公告)日：1991-01-02

申请号：EP89904441.0

申请日：1989-03-16

Applicant: AlliedSignal Inc.

Inventor： BRANDAO, Ruy, L. ,  SPIRES, Randall, C. ,  KYRIAKOS, Constantinos, S. ,  JUGS, Andrejs

IPC: G01S3 ,  G01S13

CPC classification number: G01S13/9303

Abstract: Un système de réception radiogoniométrique utilisé dans un avion protégé dans lequel un signal provenant d'un transpondeur ATCRABS sur un avion d'intrusion est reçu comprend un réseau d'antennes de type interféromètre à quatre éléments, des commutateurs d'inversion, des récepteurs individuels, un détecteur de phase et un processeur de traitement des sorties du détecteur de phase. L'invention résout le problème de la correction de la différence du retard de phase des signaux passant par les récepteurs.