Application of Weighted Projection PM Algorithm in Estimation of DOA

Abstract:

In order to improve the decreasing resolution ability of Propagator Method (PM) algorithm under the environments like low signal noise ratio and small number of snapshots, a new weighted projection PM algorithm is proposed in this paper. This algorithm orthogonalizes noise subspace to get a new one, gains the signal subspace with the relationship between it and noise subspace, and weights the signal subspace and noise subspace with values gained by projecting integral value of steering vector in the field around the signals to each element of subspace. Simulation results show that the proposed method can keep computation simple, and also can decrease signal noise ratio threshold and snapshots threshold, so it has the better resolution ability and higher precision in snapshot deficient and low signal noise ratio scenario.

• Periodical: Applied Mechanics and Materials (Volumes 300-301)
• Pages: 746-749
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.300-301.746
• Online since: February 2013
• Authors: Wei Wei Hu, Chang Ming Wang, Ai Jun Zhang
• Keywords: Direction of Arrival (DOA) Estimation, High Resolution, PM Algorithm, Weighted Projection

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