Improvement of passive localization accuracy by use of calibration

In the passive localization, the estimate error of sensor position and velocity is inevitable. By the use of the calibration, the sensor position and velocity will be improved, especially, to the Cramer-Rao lower bound (CRLB) under the ideal circumstance. The CRLB for the estimate of sensor position and velocity is derived at beginning. Then the CRLB for the estimate of source is followed. Finally, the CRLB of source before calibration and the one after calibration are compared. The simulation results show that the CRLB after calibration is lower than the one before. It demonstrates that the source location will be improved by the use of calibration.