A new implementation of adaptive array antenna system for 3-D passive estimation

In this paper we proposed the use of a circular array antenna with adaptive system in conjunction with modified Linearly Constrained Minimum Variance Beam forming (LCMVB) to meet the requirement of AOA estimation in 2-D as well as the Signal to Noise Ratio (SNR) of estimated sources (Three Dimensional 3-D estimation), rather than interference cancelation as it is used for. The proposed system was simulated, tested and compared with the modified MUSIC for 2-D estimation. The results show the system has exhibited astonishing results for simultaneously estimating 3-D parameters with accuracy approximately equivalent to the MUSIC technique (for estimating elevation and azimuth angles), and it has privilege to estimate SNR for sources which are under the estimation process. Finally, the proposed system shows a reduction in computational time and hardware complexity when it is compared with Eigenvalue decomposition techniques. Also, it has cost effectiveness with respect to (3-D) active detecting means such as radars.