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Lorentzian Operator for Angular Source Localization with Large Array

This paper presents a high resolution direction-of-arrival (DOA) algorithm which can effectively estimate highly correlated multiple signals in the presence of correlated antenna array noises at the receiver. The proposed algorithm in this paper is obtained by combining the forward/backward spatial smoothing algorithm that is an improved spatial smoothing scheme with the second-order technique which is known as an effective DOA algorithm to resolve very closely spaced multiple signals in the presence of correlated antenna noises. Analysis has been made in several aspects to compare the performance between the spatial smoothing, the spatially smoothed second-order, and the proposed algorithms in DOA estimation. Computer simulations are statistically performed to show the usefulness of the analysis.

Improved DOA estimation of correlated signals in correlated antenna noises environment

Investigation of Driver Lane Visibility According to Geometry of Road and Headlight Spread Angle

An array signal processing methodologies can provide the high resolution of a signal direction of arrival (DOA) estimation, thanks to their conceptual increase of signal-to-noise ratio (S/N). Exploring the eigen-structure based algorithms such as MUSIC, Root MUSIC, etc, gives efficient DOA results when the multiple signals are incoherent. A class of Spatial Smoothing (SS) algorithms spatially break the correlation of coherent signals using spatially distributed overlapping sub-arrays. On the other hand, Second Order (SO) algorithm has been proven to de-correlate correlated antenna noises with known or estimated noise correlation coefficients. In this paper, Spatially SmoothedSecond Order (SS-SO) algorithm, which is made by combining SS algorithm with SO technique, is proposed to resolve efficiently correlated multiple signals in the environment of correlated noise fields. Furthermore, the simulations are performed and analyzed to show that the proposed algorithm gives robust DOA results in several aspects.

Hee-Soo Kim

Papers

Improved DOA estimation of correlated signals in correlated antenna noises environment

Investigation of Driver Lane Visibility According to Geometry of Road and Headlight Spread Angle

Spatially Smoothed Second Order DOA Estimator for Correlated Signals in the Presence of Correlated Antenna Noises