DIRECT POSITION DETERMINATION (DPD) OF MULTIPLE KNOWN AND UNKNOWN RADIO-FREQUENCY SIGNALS (WedPmOR6)

Author(s) : Alon Amar (Tel Aviv University, Israel) Anthony Weiss (Tel Aviv University, Israel)

Abstract : The common methods for position determination of radio signal emitters (communications, radar) are based on meas-uring a specified parameter of the signal such as Angle-of-Arrival (AOA) or Time-of-Arrival (TOA). The measured parameters are then used to estimate the transmitter’s loca-tion. Since the measurements are done at each station inde-pendently, ignoring the constraint that the AOA/TOA esti-mates at different stations correspond to the same location, it is a sub-optimal position determination method. We propose a technique that uses exactly the same data as the common AOA methods but the position determination is direct and can handle more co-channel signals than the common methods. Although there are many stray parame-ters, only two-dimensional search is required for a planar geometry. The technique provides a natural solution to the measurements-sources association problem that is encoun-tered in AOA based systems and outperforms the AOA methods for unknown as well as known signal waveforms.

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