Abstract / truncated to 115 words (read the full abstract)

This dissertation is dedicated to the exploration of various direct positioning algorithms for radio transmitters and passive target geolocation. Contrary to the traditional ``two-step'' approach, the ``direct positioning'' approach states that the radio transmitter's position can be extracted directly from the raw samples of the radio transmitter signals collected by the system sensors, without explicitly going through an estimation of position-related parameters such as time-delay, angular or amplitude information. In this work, the concept of direct positioning is applied to various models and consistently outperforms the traditional two-step position estimators, while tightly attaining the theoretical performance bounds. In the sequel, we explore 3 models for radio transmitters and passive target geolocation. The first model discussed ... toggle 10 keywords

emitter geolocation – direct geolocation – time of arrival – angle of arrival – transponder-aided geolocation – distributed sources – mimo radar – single platform geolocation – direct position determination – direct position estimation.

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