Extended 2q-MUSIC algorithm for noncircular signals

Authors:
Jian Liu;Zhitao Huang;Yiyu Zhou
Affiliations:
Telecommunication Engineering College, Airforce Engineering University, Xi'an 710077, China;School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
Venue:
Signal Processing
Year:
2008

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Abstract

The NC-2q-MUSIC algorithm proposed in this paper is an extension of the 2q-MUSIC algorithm to the case of noncircular signals which are widely used in communication systems. The computational complexity of the NC-2q-MUSIC algorithm is analyzed in this paper and the NC-2q-MUSIC algorithm for uniform linear array (ULA), which, called NC-2q-MUSIC/ULA algorithm, needs much less computation, is also proposed. Due to the utilization of noncircular information of signals, the root mean square error (RMSE) performance of NC-2q-MUSIC algorithm is better than 2q-MUSIC algorithm for noncircular signals. And the NC-2q-MUSIC algorithm can handle more signals than 2q-MUSIC algorithm. It is proved that the robustness to modeling errors of NC-2q-MUSIC algorithm increases with q. Simulation results validate the better performance of NC-2q-MUSIC over 2q-MUSIC.