Application of MEMS for improved emitter location accuracy

This paper considers the problem of locating a stationary radar emitter from a single airborne platform making frequency measurements in the presence of aperture state uncertainty. It is shown that the location accuracy is most sensitive to aperture velocity uncertainty and that location accuracy can be improved by using a MEMS accelerometer at the aperture. A decentralized method is developed for estimating the aperture velocity that integrates the on-board navigation data, the MEMS data, and Doppler shifts of any aperture-acquired GPS signals. An upper bound is given that shows the potential for significant location accuracy enhancement.