| 摘要 |
<p>PURPOSE: To simultaneously remove interference waves and a clutter by a processing in a space which is composed of a spatial frequency axis and a Doppler frequency axis, in an unwanted-wave suppression apparatus by which the interference waves and the clutter are removed so as to extract only a target signal. CONSTITUTION: A plurality of antenna elements 1, a plurality of receivers 2, a plurality of A/D converters 3 and a first discrete Fourier transform device 4 which finds the spatial frequency from output signals of the plurality of A/D converters 3 are installed. In addition, a second discrete Fourier transform device 5 which computes the Doppler spectrum at every output signal, i.e., at every spatial frequency, of the discrete Fourier transform device 4 is provided, and a target-signal extraction means 6 which extracts a target signal in a space frequency-Doppler frequency space in which output signals of the second discrete Fourier transform device are arranged at every spatial frequency is provided.</p> |
