Constellation shaping for IEEE 802.11

Y.C. Gultekin, W.J. van Houtum, S. Serbetli, F.M.J. Willems

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

8 Citations (Scopus)
94 Downloads (Pure)

Abstract

A constellation shaping scheme is proposed. The motivation is to decrease the required transmit power for a specified spectral efficiency. Instead of imposing a non-uniform distribution on the constellation or using nonuniformly spaced symbols, a sphere constraint is employed on the n-dimensional signal space. An efficient algorithm called enumerative amplitude shaping is given to find and index all signal points in the sphere. A comparison with a prominent probabilistic shaping algorithm is provided. The enumerative approach achieves the target rate more efficiently for small block lengths. To introduce error correction, the convolutional encoder used in IEEE Std 802.11 is combined with the shaper in a novel way. Instead of utilizing a larger constellation in combination with shaping, a higher code rate is used by puncturing. Gains up to 1.61 dB are observed for the rates 3 to 6 bits/2-D with 64- and 256-QAM schemes in AWGN channels. The contribution of puncturing in these gains is discussed.
Original languageEnglish
Title of host publicationProceedings of the 28th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE PIMRC 2017)
Subtitle of host publicationEngaged Citizens and their New Smart Worlds, PIMRC 2017 - Conference Proceedings
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages7
ISBN (Electronic)978-1-5386-3531-5
ISBN (Print)978-1-5386-3529-2
DOIs
Publication statusPublished - 14 Feb 2018
Event28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2017) - Hotel Bonaventure, Montreal, Canada
Duration: 8 Oct 201713 Oct 2017
Conference number: 28
http://pimrc2017.ieee-pimrc.org/

Conference

Conference28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2017)
Abbreviated titlePIMRC 2017
CountryCanada
CityMontreal
Period8/10/1713/10/17
Internet address

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