METHODS AND SYSTEMS FOR LOCATING TARGETS USING NON LINEAR RADAR WITH A MATCHED FILTER WHICH USES EXPONENTIAL VALUE OF THE TRANSMIT SIGNAL
First Claim
1. A method of non-linear radar target location comprising:
- transmitting, with an transmitting antenna, a signal of a transmit waveform towards a target;
receiving, with a receiving antenna, a signal from the target; and
by at least one processor;
creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and
applying the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest.
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Accused Products
Abstract
Embodiments of the present invention concern locating targets using non-linear radar with a matched filter which uses exponential value of the transmit signal. According to embodiments, a method of non-linear radar target location includes: transmitting a signal of a transmit waveform towards a target; receiving a signal from the target; creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and applying the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest. In other embodiments, the matched filtering may be combined with sidelobe reduction.
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Citations
20 Claims
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1. A method of non-linear radar target location comprising:
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transmitting, with an transmitting antenna, a signal of a transmit waveform towards a target; receiving, with a receiving antenna, a signal from the target; and by at least one processor; creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and applying the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for non-linear radar target location comprising:
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a transmitter having an antenna which is configured to transmit a signal of a transmit waveform towards a target; a receiver having an antenna which is configured to receive a signal from the target; and at least one processor which is configured to; create a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and apply the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest. - View Dependent Claims (19)
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20. A method of non-linear radar target location comprising:
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transmitting, with an transmitting antenna, a signal of a transmit waveform towards a target; receiving, with a receiving antenna, a signal from the target; and by at least one processor; analyzing the transform waveform to determine if it is real or complex; and calculating an analytic signal version of the transmit waveform for subsequent use as the transmit waveform, if the transmit waveform is determined to be real; creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; filtering the received signal with the matched filter signal; performing a recursive sidelobe minimization process (RSM) in a plurality of iterations, wherein each iteration of the RSM process comprises; randomly excising a sub-set of frequency samples from within a frequency band of the matched filtered received signal; and reducing sidelobe levels of the matched filtered received signal by a windowing operation.
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Specification