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http://dx.doi.org/10.5573/ieie.2016.53.8.095

A Decorrelation Technique for Direction-of-Arrival Estimation of Coherent Signals  

Park, Geun-Ho (Department of Electronics Engineering, Pusan National University)
Shin, Jong-Woo (Department of Electronics Engineering, Pusan National University)
Kim, Hyoung-Nam (Department of Electronics Engineering, Pusan National University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.8, 2016 , pp. 95-104 More about this Journal
Abstract
Subspace-based direction-of-arrival (DOA) estimation algorithms have a difficulty in dealing with coherent signals caused by multi-path environment. As one of attempts to solve this problem, a spatial differencing method is known to be useful for not only estimating DOAs of the coherent signals but also improving the number of resolvable wavefronts even more than the number of antenna elements. However, since the conventional spatial differencing method uses only the partial statistics of the observed data, this method suffers from the performance degradation in estimation accuracy caused by the residual correlation between the uncorrelated signals. To cope with this problem, in this paper, a generalized spatial differencing method is proposed. Unlike the conventional method, the proposed method utilizes the entire statistics of the received signals. Therefore, the additional performance enhancement in both estimation accuracy and the number of resolvable wavefronts can be achieved. The performance analyses with computer simulations show that the proposed method outperforms the conventional method in terms of the estimation accuracy and the number of resolvable wavefronts.
Keywords
DOA estimation; coherent signal; spatial differencing method; uniform linear array;
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Times Cited By KSCI : 1  (Citation Analysis)
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