The Application of Spatial Diversity to Target Location

The application of multi-rate processing to target location is considered in this paper. This technique is shown to refocus the corresponding ambiguity function, giving rise to the possibility of enabling diversity to be used for the benefits of enhancing both accuracy and resolution of a target. Attention is paid to the geolocation of radio frequency (RF) emitters; however, this technique can be applied to either passive or active target location, and in a range of different environments including satellite, airborne and terrestrial intercept. This work extends a former study which had presented the notion of the generalised correlation function (GCF), a technique which readily enables a smeared ambiguity function to be re-focused. An example is provided to illustrate the impact of motion between sensors upon the ambiguity function and the corresponding refocusing, through the use of multi-rate sampling, is presented