• M. Galeebu
• M. Lakshmi ganesh
• B. Naga Lakshmi
• S. Gnana Praveen

The problem of estimating the bearing angles of multiple incident RF sources has always attracted the interests of researchers due to its innumerable practical applications in radar and sonar for source localization, and beam forming/steering in mobile communication. the practical significance of the DOA estimation problem demands real-time testing through actual hardware experiments for verification and validation of the methods, which includes more cost. In this concept, a variable step size LMS (VSS-LMS) algorithm is proposed for DOA estimation. In this method, the step size is updated by using the estimated signal power and the cumulative sum of squared instantaneous error, and the spatial spectrum is obtained by the reciprocal of array pattern, where the peak values indicate the estimated DOAs of signals. As an enhancement of this project massive MIMO is introduced along with DOA estimation. But , in massive MIMO technologies more number of antennas are utilized. In order to apply for real time applications, need to consider more number of antenna elements. Whole Transmitter and receiver is designed with OFDM MIMO concept.

Direction of Arrival, lest mean square, Variable step size, Orthogonal frequency division multiplexing, Multiple input multiple out.

"EFFICIENT DIRECTION OF ARRIVAL ESTIMATION USING MIMO TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 4, page no.426-430, April-2020, Available :http://www.jetir.org/papers/JETIR2004061.pdf

"EFFICIENT DIRECTION OF ARRIVAL ESTIMATION USING MIMO TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 4, page no. pp426-430, April-2020, Available at : http://www.jetir.org/papers/JETIR2004061.pdf