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International Journal of Antennas and Propagation
Volume 2010 (2010), Article ID 548953, 9 pages
http://dx.doi.org/10.1155/2010/548953
Research Article

Application of the Total Least Square ESPRIT Method to Estimation of Angular Coordinates of Moving Objects

Faculty of Electronics and Information Technology, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland

Received 3 September 2010; Accepted 22 December 2010

Academic Editor: Tat Yeo

Copyright © 2010 Wojciech Rosloniec. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The TLS ESPRIT method is investigated in application to estimation of angular coordinates (angles of arrival) of two moving objects at the presence of an external, relatively strong uncorrelated signal. As a radar antenna system, the 32-element uniform linear array (ULA) is used. Various computer simulations have been carried out in order to demonstrate good accuracy and high spatial resolution of the TLS ESPRIT method in the scenario outlined above. It is also shown that accuracy and angle resolution can be significantly increased by using the proposed preprocessing (beamforming). The most of simulation results, presented in a graphical form, have been compared to the corresponding equivalent results obtained by using the ESPRIT method and conventional amplitude monopulse method aided by the coherent Doppler filtration.