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Do Multiple Bits per Symbol Increase the Throughput of Ambient Backscatter Communications?
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Architecture and Computer Communication.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Architecture and Computer Communication.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Architecture and Computer Communication.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Architecture and Computer Communication.
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2016 (English)In: EWSN '16 Proceedings of the 2016 International Conference on Embedded Wireless Systems and Networks, 2016, 355-360 p.Conference paper, Published paper (Refereed)
Abstract [en]

Backscatter wireless communications have exceptionally stringent power constraints. This is particularly true for ambient backscatter systems, where energy and wireless carrier are both extracted from weak existing radio signals. The tight power constraints make it difficult to implement advanced coding techniques like spread spectrum, even though such techniques are effective in increasing the communication range and robustness in this type of systems. We draw inspiration from ?code, a previous backscatter coding approach, where data bits are encoded in single-data-bit chip sequences of considerable length to gain robustness. We introduce a new coding technique that encodes several bits in a single symbol in order to increase the data rate of ambient backscatter, while maintaining an acceptable compromise with robustness. We study the proposed technique by means of simulations and characterize the bit error rate and data rate dependencies. A comparison with ?code is drawn and the benefits of each approach are analyzed in search for the best strategy for increasing data rate while maintaining robustness to noise.

Place, publisher, year, edition, pages
2016. 355-360 p.
Keyword [en]
Backscatter Communications, Coding, Simulation
National Category
Communication Systems
Research subject
Computer Science with specialization in Computer Communication
Identifiers
URN: urn:nbn:se:uu:diva-306897ISBN: 978-0-9949886-0-7 (print)OAI: oai:DiVA.org:uu-306897DiVA: diva2:1044672
Conference
International Conference on Embedded Wireless Systems and Networks (EWSN '16) Graz, Austria. February 15 - 17, 2016
Available from: 2016-11-04 Created: 2016-11-04 Last updated: 2017-01-04Bibliographically approved

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Citation style
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