Abstract:

Many new ``robust'' localization algorithms rely on the insensitivity of a high-order processor. In this work, the robustness of a simple, Bartlett-type processor based on matching broadband signal autocorrelation functions is investigated. Specifically, the autocorrelation of the time-domain signal and the autocorrelation of the frequency-domain response will be matched. In order to highlight weaker aspects of these quantities, logarithms of these functions will also be used. Measures of robustness to be examined include the size of the localization footprint on the ambiguity surface and the peak-to-sidelobe levels in the presence of environmental mismatch. A full-wave PE model is used to produce broadband replicas. Model-generated synthetic signals with complete knowledge of the environment will provide base-line results. [This work is supported by the Naval Undersea Warfare Center, Code 2121.]