4Jiang Wei, Zhao Xia, Chen Qijun. Kalman filtering de sign based on real-time updating of noise matrix[C]// International Joint Conference on Bioinformatics Wash- ington: IEEE, 2009: 569-572.
5JosC A. Ramos, Erik I. Verriest. Total least squares fitting of two point sets in m-D[C]// Conference on Decision & Control. San Diego: IEEE, 1997: 5048 -5053.
6Munoz Hernandez G A, Diaz Sanchez A, Jones D I, et al. Estimating the frequency variation of the mexican grid by Kalman filtering [C]//IEEE International Conference on Electrical, Communications, and Computers. Washington: IEEE, 2009: 245-249.
7Zhang Z G, Chan S C, Tsui K M. A recursive frequency estimator using linear prediction and a kalman-filter-based iterative algorithm [J]. IEEE Transaction on Circults and Systems, 2008, 55(6): 576-580.