AN EFFICIENT METHOD OF PASSIVE EMITTER LOCATION

As is well known, the position of a stationary emitter can be estimated by a single moving sensor from passive measurements taken at different points along the trajectory. Usually the position is estimated from bearing measurements. Other measurement sets define alternative locating procedures. One alternative is based on the measurements of the Dopplerized radiated frequency. It is shown that the location methods based on bearing or frequency measurements differ significantly. The characteristic features of each method clearly come to light by investigating the impact of single measurements on the Cramer Rao bound. The substantial differences between both methods lead to a significant integration gain when the combined set of bearing and frequency measurements is processed. The theoretical conclusions are confirmed in a Monte-Carlo computer simulation.