A Subspace-Based Compensation Method for the Mutual Coupling in Concentric Circular Ring Arrays for Near-Field Source Localisation

Table 1

The different CCRA configurations used for obtaining the optimal case.

CCRA configurations	Radii of rings	No. of elements on each ring
(a)	𝜌1=0.5𝜆,𝜌2=𝜆,and𝜌3=1.5𝜆	𝑀1=9,𝑀2=9,and𝑀3=9
(b)	𝜌1=0.5𝜆,𝜌2=1.2𝜆,and𝜌3=2𝜆	𝑀1=9,𝑀2=9,and𝑀3=9
(c)	𝜌1=0.5𝜆,𝜌2=𝜆,and𝜌3=1.5𝜆	𝑀1=7,𝑀2=9,and𝑀3=11
(d)	𝜌1=0.5𝜆,𝜌2=1.2𝜆,and𝜌3=2𝜆	𝑀1=7,𝑀2=9,and𝑀3=11