The Journal of the Acoustical Society of Korea
- Volume 20 Issue 1E
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- Pages.7-13
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- 2001
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- 1225-4428(pISSN)
Time-Varying Subspace Tracking Algorithm for Nonstationary DOA Estimation in Passive Sensor Array
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Lim, Junseok
(Department of Electronics Engineering, Sejong University)
;
- Song, Joonil (School of Electrical Engineering, Seoul National University) ;
- Pyeon, Yongkug (Department of Electronics Engineering, Sejong University) ;
- Sung, Koengmo (School of Electrical Engineering, Seoul National University)
- Published : 2001.03.01
Abstract
In this paper we propose a new subspace tracking algorithm based on the PASTd (Projection Approximation Subspace Tracking with deflation). The algorithm is obtained via introducing the variable forgetting factor which adapts itself to the time-varying subspace environments. The tracking capability of the proposed algorithm is demonstrated by computer simulations in an abruptly changing DOA scenario. The estimation results of the variable forgetting factor PASTd(VFF-PASTd) outperform those of the PASTd in the nonstationary case as well as in the stationary case.
Keywords