Wide-band moving source passive localization in highly corruptive environments

A passive localization algorithm is proposed for moving sources emitting man-made signals. The method models the received signals on two sensors as (singularly) almost-cyclostationary. It is not based on the usual so called narrowband assumption that limits bandwidth, data-record length, and relative radial speed between source and sensors. Thus, unlike previous techniques, it statistically characterizes the signals on the two sensors as jointly spectrally correlated rather than as jointly almost cyclostationary. The algorithm estimates time-scale ratio, frequency-difference-of-arrival, and time-delay-of-arrival of the source signal impinging on the two sensors. It is highly tolerant to noise and interference and outperforms classical cyclostationarity-based techniques for large data-record lengths.