Synthetic Augmented L-shaped Array design and 2D Cramér-Rao bound analysis based on Vertical-Horizontal Moving Scheme

TY - JOUR

T1 - Synthetic Augmented L-shaped Array design and 2D Cramér-Rao bound analysis based on Vertical-Horizontal Moving Scheme

AU - Feng, Danni

AU - Wang, Guiyu

AU - Li, Xiangnan

AU - Wang, Weijiang

AU - Ren, Shiwei

N1 - Publisher Copyright: © 2024

PY - 2025/1

Y1 - 2025/1

N2 - This paper introduces an innovative approach to enhance the effectiveness of the L-shaped array using synthetic aperture processing. Through the implementation of the Vertical-Horizontal Moving Scheme (VHMS), a novel 2D array structure called the Synthetic Augmented L-shaped Array (SALA) is developed, featuring varied element spacing along the x and y axes of a 1D linear array. Comparative analyses demonstrate that the SALA achieves a larger difference coarray and higher degrees of freedom compared to arrays with an equivalent number of physical elements. The paper also provides a comprehensive derivation of the Cramér-Rao Bound (CRB) for 2D moving arrays, with detailed analyses of its conditions and properties. Simulation results highlight the SALA's superior capabilities in detecting multiple sources and providing precise 2D direction of arrival estimation, along with a lower CRB, indicating its potential for practical implementation in diverse scenarios.

AB - This paper introduces an innovative approach to enhance the effectiveness of the L-shaped array using synthetic aperture processing. Through the implementation of the Vertical-Horizontal Moving Scheme (VHMS), a novel 2D array structure called the Synthetic Augmented L-shaped Array (SALA) is developed, featuring varied element spacing along the x and y axes of a 1D linear array. Comparative analyses demonstrate that the SALA achieves a larger difference coarray and higher degrees of freedom compared to arrays with an equivalent number of physical elements. The paper also provides a comprehensive derivation of the Cramér-Rao Bound (CRB) for 2D moving arrays, with detailed analyses of its conditions and properties. Simulation results highlight the SALA's superior capabilities in detecting multiple sources and providing precise 2D direction of arrival estimation, along with a lower CRB, indicating its potential for practical implementation in diverse scenarios.

KW - Cramér-Rao bound

KW - DOA estimation

KW - Moving scheme

KW - Synthetic aperture

UR - https://www.scopus.com/pages/publications/85209231104

U2 - 10.1016/j.dsp.2024.104867

DO - 10.1016/j.dsp.2024.104867

M3 - Article

AN - SCOPUS:85209231104

SN - 1051-2004

VL - 156

JO - Digital Signal Processing: A Review Journal

JF - Digital Signal Processing: A Review Journal

M1 - 104867

ER -