Determination of radar cross sections of objects
AssigneeBAE SYSTEMS plc
InventorAdam Thomas Petrus
Life of this patent
Estimating the term…
Abstract
Provided is a method and system for measuring a radar cross section of an object (102). The method comprises: transmitting one or more radar pulses (402) to the object (102), each of the one or more pulses (402) having a predetermined pulse profile; for each of the one or more pulses (402), measuring a pulse return, the pulse return being the radar pulse (402) reflected by the object (102); deconvolving the measured one or more pulse returns using the predetermined pulse profile; and determining the radar cross section of the object (102) using the deconvolved one or more pulse returns.
Claims18
A method of measuring a radar cross section of an object, the method comprising:
- determining a pulse profile, the pulse profile including a pulse frequency and a pulse width;
- determining a range walk length, where a number of radar pulses to be transmitted in a sequence of radar pulses is based on the range walk length, where each radar pulse in the sequence has the determined pulse profile,
- for each radar pulse in the sequence,
- transmitting said radar pulse to the object measuring a pulse return value at a predetermined delay time from the transmitting of said radar pulse, the pulse return value at the predetermined delay time being the pulse return value of the radar pulse reflected by the object at a given distance along the object, where the predetermined delay time for each radar pulse in the sequence of radar pulses is different;
- performing a Fourier transform on a normalized value of said radar pulse;
- performing a Fourier transform on the measured pulse return value;
- dividing the Fourier transform on the measured pulse return value by the Fourier transform on the normalized value of said radar pulse to obtain a divided value;
- and
- performing an inverse Fourier transform on the divided value to determine the radar cross section of the object at a given distance.
A system for measuring a radar cross section of an object, the system comprising:
- a radar controller configured to determine a pulse profile, the pulse profile including a pulse frequency and a pulse width and to determine a range walk length, where a number of radar pulses to be transmitted in a sequence of radar pulses is based on the range walk length, where each radar pulse in the sequence has the determined pulse profile,
- a radar transmitter configured to transmit a sequence of radar pulses to the object;
- a radar receiver configured to measure a pulse return value corresponding to a radar pulse in the sequence at a predetermined delay time from the radar pulse in the sequence, per each radar pulse in the sequence, wherein the predetermined delay time is different for each radar pulse in the sequence, a respective pulse return value at a respective predetermining time delay being a respective pulse return value corresponding to a respective radar pulse reflected by the object;
- and
- one or more processors configured to, for each radar pulse in the sequence:
- perform a Fourier transform on a normalized value of said radar pulse;
- perform a Fourier transform on the measured pulse return value;
- divide the Fourier transform of the measured pulse return value by the Fourier transform on the normalized value of said radar pulse to obtain a divided value;
- and
- perform an inverse Fourier transform on the divided value to determine the radar cross section of the object at a given distance.
Dependencies are inferred from the claim text.