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Comments on "Feedback stabilization over signal-to-noise ratio constrained channels

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1 Author(s)
Rojas, A.J. ; ARC Centre of Excellence for Complex Dynamic Syst. & Control, Univ. of Newcastle, Newcastle, NSW

The above-named paper obtains in closed-form the infimal signal-to-noise ratio (SNR) required for stabilization of finite-dimensional linear time invariant (LTI) feedback loops, in continuous and discrete-time, for state feedback and output feedback control. The objective of the present note is to prove that the discrete-time output feedback infimal SNR result for stabilization reported in [1, Theorem III.2] is missing a term in delta, the component due to the relative degree of the plant model.

Published in:

Automatic Control, IEEE Transactions on  (Volume:54 ,  Issue: 6 )