Non-orthogonal joint diagonalization with diagonal constraints

作者：Zhou Guoxu^*; Yang Zuyuan; Wu Zongze; Zhang Jinlong

来源：Progress in Natural Science:Materials International , 2008, 18(6): 735-739.

DOI：10.1016/j.pnsc.2008.01.019

• joint diagonalization
• blind source separation
• conjugate gradient method

Joint diagonalization has attracted much attention and many algorithms have been presented so far. However, some ambiguities still exist in the objective functions for joint diagonalization. In this paper, some criterions are proposed to eliminate the above ambiguities at first, and then a new objective function which satisfies these criterions is presented. The new objective function introduces diagonal constraints for joint diagonalization, thus the trivial and unbalance solutions are excluded easily. Exactly jointly diagonalizable theorem is built to interpret the reasonableness of the new objective function and the conjugate gradient method is used to provide fast and reliable convergence. Finally, non-orthogonal joint diagonalization algorithm with diagonal constraints (DDiag) is developed. Simulations show that DDiag is efficient and robust.

• 出版日期2008-6-10
• 单位华南理工大学