Eigen Structure Based Direction of Arrival Estimation Algorithms for Smart Antenna Systems

Smart antenna is recognized as promising technologies for higher user capacity in third generation (3G) wireless networks. The core of this technology is the selection of smart algorithms in adaptive array. As signals are received from each antenna element, the direction-of-arrival (DOA) algorithm computes the angle of arrival of all impinging signals. A systematic study and comparison of the performance of two famous Eigen structure based DOA algorithms known as the MUltiple SIgnal Classification (MUSIC) and the Estimation of Signal Parameter via Rotational Invariance Techniques (ESPRIT) has been extensively studied in this research work. Simulation results revealed that MUSIC algorithm exhibits high resolution, but it can be computationally intensive. Whereas ESPRIT algorithm also provides the high resolution of MUSIC, but it does not require a costly search and can be used with different array geometries.