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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 837639, 7 pages
http://dx.doi.org/10.1155/2013/837639
Research Article

A Modified STAP Estimator for Superresolution of Multiple Signals

Department of Electronic Engineering, Harbin Institute of Technology, Harbin 150001, China

Received 22 January 2013; Accepted 8 April 2013

Academic Editor: Ulrich Nickel

Copyright © 2013 Zhongbao Wang et al. 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

A modified space-time adaptive processing (STAP) estimator is described in this paper. The estimator combines the incremental multiparameter (IMP) algorithm and the existing beam-space preprocessing techniques yielding a computationally cheap algorithm for the superresolution of multiple signals. It is a potential technique for the remote sensing of the ocean currents from the broadened first-order Bragg sea echo spectrum of shipborne high-frequency surface wave radar (HFSWR). Some simulation results and real-data analysis are shown to validate the proposed algorithm.