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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2006, Vol. 27 ›› Issue (4): 687-691.

• 论文 • Previous Articles     Next Articles

High-Precision Estimation of 2D Angle for Signals with UCAs

TAO Jian-wu1, SHI Yao-wu2, CHANG Wen-xiu2   

  1. 1. ;2. , China) (2. Academy of Communication Engineering, Jilin University, Changchun 130025, China
  • Received:2005-01-17 Revised:2005-09-01 Online:2006-08-25 Published:2006-08-25

Abstract: Based on uniform circular arrays (UCAs), a high-precision estimation of 2D direction angle for multiple sources is proposed. First, exploiting information of source in 2D space-time domain forms the space-time rotational matrix, so that the multiple sources are separated. Second, based on a direct array manifold in UCA, the azimuth and elevation are estimated by Least Squares (LS). Finally, the removal method of cyclic ambiguity is presented. Numerical results show that the advantages of estimator are high precision and robustness to amplitude and phase error of sensor gain.

Key words: information processing technique, estimation of 2D direction angles, LS, UCAs, ambiguity

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