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Performance analysis of nonlinear RLS in mixture noise

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5 Author(s)
Leung, S.H. ; Dept. of Electron. Eng., City Univ. of Hong Kong, China ; Xiong, Y. ; Weng, J.F. ; So, C.F.
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This paper presents the performance analysis of a recursive least square algorithm with error-saturation in mixture noise. The algorithm is referred to as nonlinear RLS (NRLS). A generalized clipping function is considered for the error-saturation nonlinearity. An improved mean square behavior of NRLS is carried out. It is shown that the theoretical analysis and the simulation results are close to each other. From the analysis, we can relate the convergence and the mean square error in terms of the slope and clipping level of the nonlinear function. Based on the normalized mse, an instrumental variable is derived for yielding a variable clipping function to provide fast convergence and small mean square error.

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Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:5 )

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