APRD-MUSIC Algorithm DOA Estimation for Reactance Based Uniform Circular Array

One of the most important field in array signal processing is direction-of-arrival (DOA) estimation, which is applicable in wireless and mobile communications. We consider the problem of estimating the DOA for reactance-based uniform circular arrays (UCAs). In this paper, a new technique of estimating DOAs is proposed for the reactance-based UCA antenna as well as a method to calculate optimal reactance values. This technique is based on the modified reactance domain MUltiple Signal Classification (MUSIC) algorithm. Simulation results show that DOAs can be estimated by the active ports reactance domain MUSIC (APRD-MUSIC) algorithm for reactance-based UCA antennas. By optimizing the reactance values, the proposed system obtains good performance in estimating DOAs in terms of resolution and error estimation. Simulation and measurement results show that high-resolution DOA estimation can be achieved by using APRD-MUSIC algorithm for Reactance based UCA antennas.