Radar apparatus
AssigneeHollandse Signaalapparaten B. V.
InventorsPieter Van Genderen, Wietze J. H. Meijer
Life of this patent
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Abstract
The invention relates to a radar apparatus (1, 2, 3) provided with a doppler filterbank (4) and fast thresholds (5.i), for writing per pulse a range-doppler matrix in range-doppler memory (6) and the background level in background memory (7). By unfolding the range-doppler matrices and combining the unfolded range-doppler matrices for all the pulses in a burst in combination means (10), an incoherent combination of the pulses is obtained before an actual detection takes place. This cluster before detect scheme increases the detection probability for weak echoes, without increasing the false alarm rate.
Claims7
A radar apparatus for detecting a target, comprising:
- an antenna;
- transmitting means, connected to said antenna, for generating plural bursts of radar transmit pulses, each having a pulse repetition frequency and a radar transmit frequency;
- receiving means, connected to said antenna, for receiving plural signals indicative of said plural bursts of radar transmit pulses;
- a doppler filterbank connected to said receiving means and configured to generate plural range-doppler matrices, each comprising range-doppler elements and corresponding to respective of said plural bursts;
- combination means for combining the plural range-doppler matrices to provide a combined range-doppler matrix;
- and
- threshold means for thresholding the combined range-doppler matrix so as to detect the target.
A radar apparatus for detecting a target, comprising:
- an antenna;
- a transmitter connected to said antenna that generates plural bursts of radar transmit pulses, each of said plural bursts having a pulse repetition frequency and a radar transmit frequency;
- a receiver connected to said antenna that receives plural signals indicative of said plural bursts of radar transmit pulses returned from said target;
- a doppler filterbank connected to said receiver and configured to generate plural range-doppler matrices corresponding to respective of said plural bursts, each of said plural range-doppler matrices comprising range-doppler elements;
- a combination mechanism that combines the plural range-doppler matrices to provide a combined range-doppler matrix;
- and
- a threshold mechanism that detects the target by thresholding the combined range-doppler matrix.
Dependencies are inferred from the claim text.