Modified FOC-based Root-MUSIC algorithm for DOA estimation of coherent signal groups
Shahriar Shirvani Moghaddam 1, Zohre Ebadi 2, Vahid Tabataba Vakili 3
1. DCSP Research Lab., Faculty of Electrical and Computer Engineering Shahid Rajaee Teacher Training University (SRTTU), Tehran, Iran, firstname.lastname@example.org
2. Electrical Engineering Department Tehran South Branch Islamic Azad University (IAU) Tehran, Iran
3. Dept. of Electrical Engineering Iran University of Science & Technology (IUST) Tehran, Iran
Corresponding author: zohreebadi @yahoo.com, Tel +98-910-2911161
Abstract: Conventional multiple signal classification (MUSIC) and Root-MUSIC algorithms cannot resolve coherent sources. In this paper, a novel Root-MUSIC algorithm using the idea of modified MUSIC is proposed which overcomes shortcoming of conventional Root-MUSIC algorithm. It is based on fourth order cumulant (FOC) for direction of arrival (DOA) estimation of coherent signal groups. Several simulations are made to evaluate the performance of proposed algorithm. Two groups of coherent signals are considered that each group contains two signals. Numerical results show that the proposed algorithm can resolve sources with different QAM modulation sizes (4 and 16). It also shows that in wide range of signal to noise ratios, angular root mean square error (RMSE) performance metric of proposed algorithm is lower than modified MUSIC algorithm.
[Shahriar Shirvani Moghaddam, Zohre Ebadi, Vahid Tabataba Vakili. Modified FOC-based Root-MUSIC algorithm for DOA estimation of coherent signal groups. Life Sci J 2013;10(1):843-846]. (ISSN: 1097-8135).http://www.lifesciencesite.com.
Keywords: Coherent signals, Direction of arrival (DOA), Uniform linear array (ULA), Root-MUSIC, Fourth order cumulant (FOC)