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Robust filtering for discrete-time systems with saturation and its application to transmultiplexers

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3 Author(s)
Yufei Xiao ; Dept. of Electr. & Comput. Eng., Univ. of Virginia, Charlottesville, VA, USA ; Yong-Yan Cao ; Zongli Lin

This paper considers the problem of robust filtering for discrete-time linear systems subject to saturation. A generalized dynamic filter architecture is proposed, and a filter design method is developed. Our approach incorporates the conventional linear H2 and H filtering as well as a regional l2 gain filtering feature developed specially for the saturation nonlinearity and is applicable to the digital transmultiplexer systems for the purpose of separating filterbank design. It turns out that our filter design can be carried out by solving a constrained optimization problem with linear matrix inequality (LMI) constraints. Simulations show that the resultant separating filters possess satisfactory reconstruction performance while working in the linear range and less degraded reconstruction performance in the presence of saturation.

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Signal Processing, IEEE Transactions on  (Volume:52 ,  Issue: 5 )