Narrow-Band Passive Systems Theory with Applications to Positioning and Navigation.
MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
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The passive tracking problem with narrow-band and linear constraints on geometry and motion is considered. In Part I a model is developed which exhibits explicitly the nonhomogeneous received wave field structure induced by the spatial baseline observers array andor temporal diversity source motion. This model encompasses the basic phenomena of many practical situations, and is sufficiently simple to be useful in analytical studies. The fundamental question of global parameter identifiability is pursued, with emphasis on passive ranging. The structure and global and local performance of the optimal and suboptimal receivers is examined and, by considering two limiting geometries distant and close observer, analytical intuitively pleasing expressions are derived which bound the mean-square performance. In Part 2 a practical hybrid solution to the passive tracking problem is developed, and a compromise is achieved between global parameter identifiability and receiver complexity. The behavior of the hybrid algorithm and its sensitivity to the underlying model assumptions of linear path perturbations are analyzed. The theory of passive tracking is applied to positioning in such situations as air traffic control, underwater acoustics, and navigation orbiting and geostationary satellites.
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