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A Method for Fast Radio Frequency Direction Finding Using Wireless Sensor Networks

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2 Author(s)
Batson, M.S. ; Naval Postgraduate Sch., Monterey ; McEachen, J.C.

We present the design of a remotely deployable distributed wireless antenna system formed from wireless sensor network nodes. Specifically, the focus is on enhancing the detection range of a distributed wireless antenna system. The primary objective is to create a methodology to steer the beam in the desired direction to enhance radio frequency (RF) direction finding and follow-on signal reception. The distributed wireless antenna system uses a combination of time difference of arrival (TDOA) and adaptive beamforming to localize the target and enhance the reception in the target direction. The TDOA lines-of-bearing are calculated using a combination of the Cross- Ambiguity Function to calculate the actual time difference and the Newton-Raphson technique to focus the beamforming efforts. A Least Mean Squares (LMS) adaptive beamforming algorithm is then used to localize the target for further prosecution.

Published in:

Hawaii International Conference on System Sciences, Proceedings of the 41st Annual

Date of Conference:

7-10 Jan. 2008