Performance Evaluation of Smart Antenna DOA Estimation using MUSIC & Improved MUSIC algorithms

Array signal processing deals with the manipulation of signals for null steering to reduce interference and to point the major lobe towards the intended signal. High Resolution signal processing always involves high cost and high computational complexity. This paper shows the analysis of direction of arrival estimation in smart antenna systems using the high resolution multiple signal classification (MUSIC) and improved MUSIC algorithm. To show the simulations, MATLAB (R2011a) is used which offers a lot of instructions and functions which make the simulations more convenient. The simulations show what factors affects the accuracy, the resolution of the direction of arrival (DOA) estimation and the modifications made to the already existing algorithm to estimate arrival angles of coherent signals. There are many algorithms which can be used in DOA estimation which have made great achievements; the most classic algorithm among all is the MUSIC algorithm. As MUSIC algorithm is only limited to uncorrelated signals, Improved MUSIC algorithm is proposed which can be used for coherent signals also.