发明名称 Device for calculating a discrete fourier transform and its application to pulse compression in a radar system
摘要 A device for calculating a discrete, moving window and non-recurrent Fourier transform, especially applicable to the processing of a pulse compression radar signal. The device includes N stages which, on the basis of samples of the input signal, each give a signal of the form: <IMAGE> (1) with: X'km+1 = X'km + x'm+N - x'm (2) <IMAGE> (3) where k is the index of the stage (O<k<N), m the index of the window and N the number of samples in the window, N being a multiple of four. The complex rotations of the expressions (1) and (3) are each broken down into a rotation in the first quadrant of the complex plane, a rotation common to N stages and a supplementary rotation specific to each stage, achieved by addition-subtraction.
申请公布号 US4772889(A) 申请公布日期 1988.09.20
申请号 US19860919163 申请日期 1986.10.15
申请人 THOMSON-CSF 发明人 ELLEAUME, PHILIPPE
分类号 G01S13/28;G06F17/14;G06T9/00;(IPC1-7):G01S7/44 主分类号 G01S13/28
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