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Multiplication-free adaptive digital filters

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3 Author(s)
Park, T.H. ; Dept. of Electron. Eng., Yonsei Univ., Seoul, South Korea ; Youn, D.H. ; Cha, I.W.

The authors update delta modulation digital filter weights using the LMS (least-mean-squares) and the SIGN algorithms to realize an adaptive digital filter without multiplication operations. It is shown that using the SIGN algorithm results in an adaptive filter that can be implemented using the simple up/down counting operations. Learning curves demonstrating convergence properties of the algorithms for a system identification problem are presented

Published in:

Proceedings of the IEEE  (Volume:76 ,  Issue: 5 )