Radar aided doppler compensation

摘要

A radar system includes an antenna. The radar system comprises a processor for providing an error in ground speed estimate based upon Doppler velocity data, and a transmitter. The frequency of radar signals from the transmitter is adjusted according to a velocity of the aircraft calculated using the error in ground speed estimate or using the error in ground speed estimate. The adjusted frequency can allow ground clutter to be removed by high pass filtering in one embodiment.

主权项

1. A radar system including an antenna, the radar system comprising:
a processor for providing a ground speed estimate based upon Doppler velocity data; a transmitter, wherein a frequency of radar signals from the transmitter is adjusted according to a velocity of the aircraft determined using the ground speed estimate, wherein the ground speed estimate is calculated using the Doppler velocity data and a ground speed from an inertial reference source, and wherein the frequency is adjusted so that ground clutter returns are moved to approximately DC and radar returns are filtered by a high pass filter to remove the ground clutter returns.