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| Circle Array Receiving Signal 2D-DOA Separable Estimation Based on Twice Virtual Interpolations |
| Sun Xue-jun; Zhang Gao-yi; Tang Bin; Gan Quan |
| School of Electronic Engineering, UEST of China Chengdu 610054, China |
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Abstract In this paper, the twice virtual interpolations is introduced into the circle array receiving signal 2D-DOA separable estimation, twice virtual interpolations are used to get the rotational invariance factor, the factor is used to get the estimation of elevation angle, then the estimated elevation angle is substituted into the circle array manifold, thus the azimuth angle can be get by one dimensional search. This method reduced the estimation error because of the interpolation error between the virtual array and the real array efficiently, simulation results validate the efficiency of the method.
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Received: 28 January 2008
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2008, Vol. 30 
