Multistatic Target Localization in Absence of Transmitter Position Using Differential Time Delay Measurements

In the correspondence we investigate the problem of localization of a target using signals of opportunity, without knowledge of the transmitter position or synchronization. It explores the use of differential time delays (DTDs) from each receiver to localize the target. An iterative algorithm based on the principle of block majorization- minimization (MM) technique is proposed. The proposed iterative method is guaranteed to converge and offers advantages, such as its applicability even for least possible number of sensors and effectiveness in high-noise scenarios compared to the state-of-the-art method. Several numerical simulations demonstrate that the proposed technique has better accuracy and reaches the Cramer-Rao Lower Bound.