Novel method of ordinal bearing estimation for more sources based on oblique projector

作者：Sun Wei^*; Bai Jianlin; Wang Kai

来源：Journal of Systems Engineering and Electronics, 2009, 20(3): 445-449.

• spatial differencing
• oblique projector
• Toeplitz property
• direction of arrival estimation

A novel direction of arrival (DOA) estimation method is proposed when uncorrelated, correlated, and coherent sources coexist under color noise field. The uncorrelated and correlated sources are firstly estimated using the conventional spatial spectrum estimation method, then the noise and uncorrelated sources in Toeplitz structure are eliminated using differencing, finally by exploiting the property of oblique projection, the contributions of correlated sources are then eliminated from the covariance matrix and only the coherent sources remain. So the coherent sources can be estimated by the technique of modified spatial smoothing. The number of sources resolved by this approach can exceed the number of array elements without repeatedly estimating correlated sources. Simulation results demonstrate the effectiveness and efficiency of our proposed method.

• 出版日期2009-6
• 单位中国人民解放军空军工程大学