Patent ID: 9170323
Filing Date: 2015-10-27
Classification: G01S

Abstract:
1. A pulse radar range profile motion compensation method implemented by a radar system comprising a processor, a radar transmitter and a radar receiver, the method comprising: i. acquiring, from the radar receiver, samples of radar echo signals generated by a target moving at a range rate, {dot over (R)}, and illuminated during a look by a pulse radar signal, transmitted from the radar transmitter having a carrier frequency, f ii. acquiring from a radar tracker tracking the target an estimate of the range rate of the target; iii. removing, using the processor, an additional phase acquired by the echo signals in dependence on the estimated range rate and a time to a pulse since the start of the look; iv. removing, using the processor, a shift in range cells of the receiver samples in dependence on the estimated range rate and a time to a pulse since the start of the look; v. applying, using the processor, a pulse Doppler filter to the receiver samples from step iv; vi. identifying, using the processor, the peak Doppler frequency corresponding to a skin return of the target and calculating a shift from zero, f vii. calculating, using the processor, a range rate correction Δν as viii. adding, using the processor, the range rate correction to the estimate of the range rate to obtain a new range rate estimate and repeating steps iii. and iv. using the new range rate estimate to obtain motion compensated receiver samples; and ix. generating, using the processor, an output signal indicative of the motion compensated receiver samples for generating a range profile.