Direction Finding for Electronic Warfare Systems Using the Phase of the Cross Spectral Density
Johan Falk, Peter Händel, Magnus Jansson · KTH Publication Database DiVA (KTH Royal Institute of Technology) · 2002
In modern electronic warfare systems there is a need for direction-finding of transmitters using waveforms for military stealth communication. In this paper, a correlation-based method is investigated utilizing the phase of the cross spectral density to estimate the time-difference-of-arrival from a two-channel digital receiver. A least squares method is reviewed, and its performance is investigated by theoretical analysisand by Monte-Carlo simulations. Proper Cramér-Raobounds are derived. It is shown that the method is statistically efficient for flat spectrum signals. The method is found to be a promising method for use against military communication in an electronic warfare direction-finding system.