A system for correcting receiver errors in radar

摘要

The system involves applying a predetermined signal to a radar receiver at each frequency of stepped frequencies employed or at the intermediate frequency and obtaining digitised quadrature signals. An estimate of a correction transform is obtained from the quadrature signals and stored. The predetermined signal is disconnected and the transform employed to correct for quadrature phase error and quadrature gain error in the received signals at each frequency step or at the intermediate frequency during reception of signals by the receiver.