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Location estimation of multiple near-field broadband sources by combined use of DOA-Matrix method and SAGE algorithm in array antenna processing

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4 Author(s)
Hirano, T. ; Dept. of Comput. Sci. & Eng., Nagoya Inst. of Technol., Nagoya, Japan ; Kikuma, N. ; Hirayama, H. ; Sakakibara, K.

It is important to understand the radio wave propagation structures in wireless communications. One of useful techniques for the purpose is high-resolution DOA (Direction Of Arrival) estimation using array antenna[1]. However, for the near field sources, different signal models are required since the incident wave fronts are spherical. In this paper, we deal with the near-field DOA-Matrix method for source localization[2]. This is an ESPRIT-like method and features not needing peak search of spectrum, thus leading to high computational efficiency. Also, the near-field DOA-Matrix method can be incorporated into the SAGE algorithm, and hence the combined algorithm can perform successful estimation of multiple waves incident on the array[3]. However, the near-field DOA-Matrix method requires that source signals are narrowband[2][4]. Therefore, we improve herein the method so that it can be applied to broadband signals.

Published in:

Antennas and Propagation (ISAP), 2012 International Symposium on

Date of Conference:

Oct. 29 2012-Nov. 2 2012