Delta-Modulation Coding Redesign for Feedback-Controlled Systems

Abstract : This paper investigates the closed-loop properties of the differential coding scheme known as Delta-modulation (Δ-M) when used in feedback loops within the context of feedback controlled systems. We propose a new modified scheme of the original form of the Δ-M algorithm which is better suited for applications where the sensed information is used in feedback. A state feedback controller is implemented with the state estimated by a predictor-based differential decoder. Stability of the resulting closed-loop system (controller-coder-decoder) is studied. These properties (stability and performance) depend on the quantization parameter Δ, which is assumed constant in the first part of this paper. In a further step, parameter Δ is made adaptive, by defining an adaptation law exclusively in terms of information available at both the transmitter and receiver side.With this approach both stability and performance is improved.
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Submitted on : Sunday, June 14, 2009 - 5:37:34 PM
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Carlos Canudas de Wit, Fabio Gomez Estern, Francisco Rubio. Delta-Modulation Coding Redesign for Feedback-Controlled Systems. IEEE Transactions on Industrial Electronics, Institute of Electrical and Electronics Engineers, 2009, 56 (7), pp.2684-2696. ⟨10.1109/TIE.2009.2020079⟩. ⟨hal-00394981⟩

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