A convex optimization approach to signal reconstruction over switching networks

Shengxiang Jiang, Petros G. Voulgaris

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper we consider signal reconstruction over communication network channels that can be modeled as input switching systems. Such systems can be associated with a variety of applications including control and estimation over networks. In particular, we formulate the signal reconstruction problem as a prototypical model matching problem where the various mappings involved belong to a class of input switching systems. The design interest is placed on minimizing the worst case or stochastic average performance of this model matching system over all possible switchings with an H2 norm as the performance criterion. This minimization is performed over all stable receivers R in the class of input switching systems. For the particular setup at hand, and in the case of matched switching, two convergent sequences to the optimal solution from above and below respectively are formulated in terms of quadratic programs. An approximate solution with any a priori given precision is possible by finite truncation. Also, it is shown that in the cases of arbitrary, partially matched or unmatched switching, the optimal receiver R need not depend on the switching sequence and that it can be obtained as a linear time-invariant solution to an associated H2 norm optimization.

Original languageEnglish (US)
Pages (from-to)2784-2793
Number of pages10
JournalAutomatica
Volume45
Issue number12
DOIs
StatePublished - Dec 1 2009

Keywords

  • Convex programming
  • Model matching
  • Signal reconstruction
  • Stochastic switching
  • Worst case switching

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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