Unitary Direction of Arrival Estimation Based on A Second Forward/Backward Averaging Technique

作者：Yan, Feng-Gang; Liu, Shuai; Wang, Jun^*; Jin, Ming; Shen, Yi

来源：IEEE Communications Letters, 2018, 22(3): 554-557.

DOI：10.1109/LCOMM.2017.2771489

• Direction of arrival (DOA) estimation
• second forward/ backward (SFB) averaging
• real-valued computation
• unitary root-music (u-root-music)

A second forward/ backward (SFB) averaging technique is presented to transform the real symmetrical covariance matrix of the popular unitary root-MUSIC (U-root-MUSIC) into a real bisymmetrical one, based on which a SFB-U-root-MUSIC direction of arrival estimation algorithm with reduced computational complexity is developed. The proposed SFB-U-root-MUSIC algorithm reduces the computational complexity in the eigenvalue decomposition (EVD) stage by a factor about four because it performs real-valued EVDs on two sub-matrices of about half sizes. The proposed SFB averaging technique is further extended as a generalized dimension reduction method to other unitary DOA estimators for low-complexity EVD computation, and numerical simulations are conducted to demonstrate, such a dimension reduction technique sacrifices statistically nonsignificant root mean square performance that is acceptable.

• 出版日期2018-3
• 单位哈尔滨工业大学