Reduction of CRB in Arbitrary Pre-designed Arrays Using Alter an Element Position

TL;DR

This paper introduces a method to optimize element positions in arbitrary array designs to reduce the Cramér-Rao Bound (CRB) for better simultaneous range and angle estimation of close emitters, demonstrated through simulations.

Contribution

It proposes a novel algorithm that adjusts an array element's position to minimize CRB, applicable to any pre-designed array, enhancing estimation accuracy.

Findings

CRB is significantly reduced after applying the method

Simulation results confirm improved estimation performance

Method applicable to arbitrary array configurations

Abstract

Simultaneous estimation of range and angle of close emitters usually requires a multidimensional search. This paper offers an algorithm to improve the position of an element of any array designed on the basis of some certain or random rules. In the proposed method one element moves on its original direction, i.e., keeping the vertical distance to each source, to reach the constellation with less CRB. The performance of this method has been demonstrated through simulation and a comparison of the CRB with receptive signals covariance matrix determinant has been made before and after the use of this method.