Decorrelation affine projection algorithm and its application
Wen Hao-xian · Journal of Zhejiang University(Engineering Science) · 2014
A decorrelation affine projection algorithm(DAPA)was proposed to increase the convergence rate when the input signal is highly correlated.The input signal matrix was preprocessed to eliminate its correlation at different time instant.Then the orthogonal component of the input matrix was used to update the coefficients of the adaptive filter.The step-size was optimized to minimize the posteriori error. The DAPA was used in echo cancellation system for simulation with colored noise and real speech sequence.Experimental results indicate that fast convergence rate is achieved and computational complexity is moderate.