Spectral estimation for smart antenna system

Smart Antenna is among the fastest emerging technologies employed in wireless communication. An antenna array and a Digital Signal Processor using an Adaptive Algorithm, make a Smart Antenna which can precisely locate user position in diverse environments. In this paper spectral estimation algorithms have been analyzed such as MUSIC, Root-MUSIC and ESPRIT. A systematic overview and simulation based performance comparison of each Spectral estimation algorithm has also been presented in this paper. Results reveal that the MUSIC AOA estimate has the finest resolution in estimating approximate DOA but requires intensive mathematical calculations.