Auto-calibration angle estimation algorithm for VHF radar in the presence of mutual coupling

作者：Liu Jun^*; Liu Zheng; Xie Rong; Zhao Yong Bo

来源：Chinese Journal of Radio Science, 2011, 26(6): 1046-1051.

• Angle estimation
• Antenna aperture
• Array calibration
• Auto calibration
• Calibration source
• Data covariance matrix
• Iterative processing
• Multi-path
• Multipath signals
• Mutual coupling
• Mutual coupling calibrations
• Mutual coupling matrix
• Signal parameters
• Subspace based methods
• Surface reflections
• Target angle
• Uniform linear arrays
• VHF radar

Aimed at the problem of low elevation estimation for VHF radar in the presence of mutual coupling, an auto-calibration direction-of-arrival(DOA) algorithm is proposed. First, the form of VHF radar echo signal in the present of mutual coupling and multipath is analyzed. Then, based on the characteristic of the mutual coupling matrix for uniform linear array, the form of the signal parameters in the received data covariance matrix is transformed. Finally, without any previous mutual coupling calibration information, a subspace-based method is applied to estimate the target angle, and simultaneously the surface reflection coefficients and mutual coupling matrix can be achieved. Compared with many existing array calibration methods, the proposed algorithm retains antenna aperture and avoids iterative processing in the presence of coherent multipath signals and unknown mutual coupling matrix. Furthermore, it requires neither the presence of calibration sources nor previous calibration elements. Computer simulations show the effectiveness of the proposed algorithm.

• 出版日期2011
• 单位西安电子科技大学