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1. 发明授权

US6028549A Process for the detection and suppression of interfering signals in S.A.R. data and device for performing this process 失效
标题翻译：用于检测和抑制S.A.R.中的干扰信号的过程。用于执行此过程的数据和设备
公开(公告)号：US6028549A
公开(公告)日：2000-02-22
申请号：US316380
申请日：1999-05-21
申请人： Stefan Buckreuss , Thomas Sutor
发明人： Stefan Buckreuss , Thomas Sutor
IPC分类号： G01S7/36 , G01S13/90
CPC分类号： G01S13/90 , G01S13/9011 , G01S7/36
摘要： For the detection and suppression of interfering signals in SAR data, a time-domain noisy raw data signal U.sub.T (t) is Fourier-transformed by range lines in raw frequency-domain spectrum U.sub.T (f). The resulting spectrum U.sub.T (f) is law-pass filtered according to a transmission-signal bandwith B.sub.s to yield a useful spectrum U.sub.T (f) and an autocorrelation function (t) of useful spectrum U.sub.T (f) is determined in the time domain. A weighting function w(t) is used to suppress portions of the useful signal in the autocorrelation function (t), thereby intensifying the interfering signal in relation to the autocorrelation function (t). The resulting signal (t) is transformed into a power spectral density (f) and a threshold value m is calculated from the power spectral density (f) with a MADMED function. A final notch filter W.sub.N (f) is generated by Fourier-transforming the ideal notch filter frequency response W.sub.N ideal (f).
摘要翻译：为了检测和抑制SAR数据中的干扰信号，时域噪声原始数据信号+ E，otl U + EE T（t）由原始频域频谱+ E，otl U + EE T（f）。所得到的频谱+ E，otl U + EE T（f）根据具有Bs的传输信号频带进行合法滤波，以产生有用频谱UT（f）的有用频谱UT（f）和自相关函数+ Z（t） f）在时域中确定。使用加权函数w（t）来抑制自相关函数+ Z（t）中的有用信号的部分，从而相对于自相关函数+ Z（t）加强干扰信号。所得到的信号+ Z（t）被转换成功率谱密度+ Z（f），并且利用MADMED函数从功率谱密度+ Z（f）计算阈值m。通过傅立叶变换理想陷波滤波器频率响应WN理想（f）产生最终陷波滤波器WN（f）。

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