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Multi-Rate Control over AWGN Channels via Analog Joint Source Channel Coding
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg.
2016 (Engelska)Ingår i: 2016 IEEE 55th Conference on Decision and Control, CDC 2016, Institute of Electrical and Electronics Engineers (IEEE), 2016, s. 5968-5973, artikel-id 7799185Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We consider the problem of controlling an unstable plant over an additive white Gaussian noise (AWGN) channel with a transmit power constraint, where the signaling rate of communication is larger than the sampling rate (for generating observations and applying control inputs) of the underlying plant. Such a situation is quite common since sampling is done at a rate that captures the dynamics of the plant and which is often much lower than the rate that can be communicated. This setting offers the opportunity of improving the system performance by employing multiple channel uses to convey a single message (output plant observation or control input). Common ways of doing so are through either repeating the message, or by quantizing it to a number of bits and then transmitting a channel coded version of the bits whose length is commensurate with the number of channel uses per sampled message. We argue that such "separated source and channel coding" can be suboptimal and propose to perform joint source channel coding. Since the block length is short we obviate the need to go to the digital domain altogether and instead consider analog joint source channel coding. For the case where the communication signaling rate is twice the sampling rate, we employ the Archimedean bi-spiral-based Shannon Kotel'nikov analog maps to show significant improvement in stability margins and linear-quadratic Gaussian (LQG) costs over simple schemes that employ repetition.

Ort, förlag, år, upplaga, sidor
Institute of Electrical and Electronics Engineers (IEEE), 2016. s. 5968-5973, artikel-id 7799185
Serie
IEEE Conference on Decision and Control, ISSN 0743-1546
Nationell ämneskategori
Kommunikationssystem
Identifikatorer
URN: urn:nbn:se:kth:diva-208571DOI: 10.1109/CDC.2016.7799185ISI: 000400048106029Scopus ID: 2-s2.0-85010782640ISBN: 978-1-5090-1837-6 (tryckt)OAI: oai:DiVA.org:kth-208571DiVA, id: diva2:1108281
Konferens
55th IEEE Conference on Decision and Control, CDC 2016, ARIA Resort and Casino, Las Vegas, United States, 12 December 2016 through 14 December 2016
Forskningsfinansiär
EU, Horisont 2020, 708932
Anmärkning

QC 20170612

Tillgänglig från: 2017-06-12 Skapad: 2017-06-12 Senast uppdaterad: 2018-02-28Bibliografiskt granskad

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Pettersson, Gustav M.
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