公开(公告)号：US4573052A

公开(公告)日：1986-02-25

申请号：US369119

申请日：1982-04-16

申请人： Jean C. Guillerot ,  Hubert Joncour ,  Gerard Auvray ,  Daniel Balduzzi

发明人： Jean C. Guillerot ,  Hubert Joncour ,  Gerard Auvray ,  Daniel Balduzzi

IPC分类号： G01S7/28 ,  G01S7/36

CPC分类号： G01S7/2813

摘要： An apparatus and method for reducing the power of active jamming signals received by the sidelobes of a radar antenna. A known method includes providing a radar with a main antenna and N auxiliary antennas, each antenna being associated with a corresponding processing channel. The signals received by the N antennas are each given a weighting coefficient corresponding to jamming on that channel. The N signals are then combined to form a weighted linear combination which is subtracted from the main channel signal to provide a signal with reduced jamming. The present invention provides apparatus and method for reducing clutter signals (such as fixed echoes and thermal noise) from each of the signals received in the N channels, thus producing very accurate weighting coefficients thereby allowing jamming power to be further reduced. Apparatus and method are provided for carrying out moving target indication (MTI) on all channels, determining the jammed range cells by comparing the main channel signal with the auxiliary channel signals and validating these signals with respect to thermal noise, determining the weighting coefficients from information derived from a given number of jammed range cells (preferably those grouped together at the end of recurrence), forming the weighted linear combination from only those signals which are, in fact, jammed, and subtracting the weighted linear combination from the main channel signal.

摘要翻译： 一种用于降低由雷达天线的旁瓣接收的主动干扰信号的功率的装置和方法。 已知的方法包括向雷达提供主天线和N个辅助天线，每个天线与相应的处理信道相关联。 由N个天线接收的信号各自被给予对应于该信道上的干扰的加权系数。 然后将N个信号组合以形成从主信道信号中减去的加权线性组合，以提供具有减少的干扰的信号。 本发明提供了从N个信道中接收的每个信号中减少杂波信号（例如固定回波和热噪声）的装置和方法，从而产生非常精确的加权系数，从而允许进一步减少干扰功率。 提供了用于在所有通道上执行移动目标指示（MTI）的装置和方法，通过将主信道信号与辅助信道信号进行比较来确定干扰范围单元，并相对于热噪声验证这些信号，从信息确定加权系数 从给定数量的卡住范围单元（优选在复现结束时分组在一起的那些）导出，从仅实际上卡住的那些信号形成加权线性组合，并从主信道信号中减去加权的线性组合。