The Boeing Company
Self-compensating radar system

Abstract:

A method for self-calibrating a radar system includes forming a calibration loop-back signal path. The calibration loop-back signal path is configured for determining a passband response of each of a radio frequency (RF) signal path, a local oscillator (LO) signal path, and an intermediate frequency (IF) signal path of the radar system. The method also includes transmitting a set of calibration signals into the RF signal path and the LO signal path and measuring output signals from the IF signal path in a receiver of the radar system. The method further includes determining the passband response of each of the RF signal path, the LO signal path and the IF signal path from the measured output signals and compensating for distortions and/or non-linearities in the signal paths using the passband response of each signal path.