| 摘要 |
<p>PURPOSE:To raise the accuracy of detection of direction, by performing the Fourier transformation of a group of data corresponding to a prescribed number of radar data including a piece of radar data whenever the piece of rada data is supplied. CONSTITUTION:Doppler radar data supplied from phase detectors 121, 122 of a transmitter receiver 11 and corresonding to unit direction ranges are changed into binary digital data by A-D converters 131, 132 which are controlled by a clock signal having a prescribed recurrence frequency and synchronized with radar scanning pulses by a timing signal generator 14. The binary digital data are supplied to a conutinuous DFT circuit 133. The circuit 133 performs correlative processing by frequency analysis to generate eight digital Doppler information pieces or the like including radar data for a unit direction range and necessary for clutter rejection. The digital Doppler information pieces are Fourier-transformed by a signal processor 134 comprising a prescribed memory, a calculation circuit, etc. The direction to a target is thus determined at each period of radar pulses based on frequency analysis. This results in raising the accuracy of determination of the direction in comparison with the processing of radar data over several periods of radar pulses.</p> |
