Title :
Optimum design of the hard-switching dual sign algorithm for adaptive echo cancellation
Author :
Wang, Chin-Liang ; Chen, Rong-Yih
Author_Institution :
Inst. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
A practical design method is presented to optimize the hard-switching dual sign algorithm (HS-DSA), formed by the sign algorithm (SA) with a time switch for the step size, for fast convergence, in adaptive echo cancellation. For the optimized HS-DSA, the two step sizes and the switching instant are optimally chosen to yield the most rapid convergence under an initial and desired mean-square error. As compared to previously known variants of the SA, the optimized HS-DSA has improved convergence performance and retains the advantage of hardware simplicity. Computer simulations were employed to show the correctness and effectiveness of the algorithm
Keywords :
adaptive filters; digital filters; echo suppression; adaptive echo cancellation; adaptive filtering; computer simulations; convergence; design method; hard-switching dual sign algorithm; mean-square error; step size; time switch; Algorithm design and analysis; Computer simulation; Convergence; Design methodology; Design optimization; Echo cancellers; Finite impulse response filter; Hardware; Least squares approximation; Switches;
Conference_Titel :
Communications, 1992. ICC '92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications., IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0599-X
DOI :
10.1109/ICC.1992.268176
