Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A Novel Transmitter Architecture for Spectrally-Precoded OFDM
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.ORCID iD: 0000-0002-9225-8150
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.ORCID iD: 0000-0003-0413-4826
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.ORCID iD: 0000-0001-8647-436x
2018 (English)In: IEEE Transactions on Circuits and Systems Part 1: Regular Papers, ISSN 1549-8328, E-ISSN 1558-0806, Vol. 65, no 8, p. 2592-2605Article in journal (Refereed) Published
Abstract [en]

Frequency nulling spectral precoding is an approachthat suppresses the out-of-band emission in OFDM systems.In this paper, we discuss the transmitter architecture of thespectrally precoded OFDM systems. We design a novel precoderthat matches the practical implementation of the OFDM modulator.We show that spectral precoding can relax the analog lowpass filtering requirements of the OFDM system transmitter. Weexamine the effect of spectral precoding on the PAPR as wellas the effect of the PA on the spectral precoding suppressionperformance. We also study the compliance of the spectrallyprecoded OFDM transmitter with the 3GPP standardizationmeasures and analyze its computation complexity. At the receiverside, we analyze the in-band interference and BER performanceof the suggested precoding approach.

Place, publisher, year, edition, pages
IEEE, 2018. Vol. 65, no 8, p. 2592-2605
National Category
Engineering and Technology Signal Processing
Research subject
Signal Processing
Identifiers
URN: urn:nbn:se:ltu:diva-67847DOI: 10.1109/TCSI.2018.2797527ISI: 000437882000022Scopus ID: 2-s2.0-85041808007OAI: oai:DiVA.org:ltu-67847DiVA, id: diva2:1187784
Funder
Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning
Note

Validerad;2018;Nivå 2;2018-08-08 (rokbeg)

Available from: 2018-03-05 Created: 2018-03-05 Last updated: 2018-12-07Bibliographically approved
In thesis
1. Spectrally Precoded OFDM - Design and Analysis
Open this publication in new window or tab >>Spectrally Precoded OFDM - Design and Analysis
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Despite shifting towards mm-wave bands, the sub-6 GHz band will continue to be a fundamental spectral band in 5G. However, the severe congestion in this band makes a well-constrained spectrum a critical requirementof 5G. A well-constrained spectrum means that the communications regimes should dwell within their dedicated spectral bands and do not interfere with other systems working on neighboring bands. Consequently, the communi-cations community seeks convenient modulation schemes.

The 5G standards have already defined cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) as the modulation scheme for most of the sub-6 GHz band. However, the high out-of-band (OOB) emission phe-nomenon in OFDM is unfavorable for some regimes operating in 5G. Therefore, to legitimize OFDM in all 5G regimes, we need to suppress the OFDM OOB emission.

Since the discontinuous nature of the OFDM signal is the main reason forthe high OOB emission, one solution is to render the discontinuous OFDM signal continuous. Two factors control this discontinuity: the physical shape of the modulated signal and the correlation of the data symbols that modulate the OFDM signal.

While most traditional approaches focus on reshaping the OFDM signal to render it continuous, in this work, we give our attention to the spectral precoding approaches. These approaches manipulate the correlation of the data symbols to control the high OOB emission in OFDM.

After almost ten years of analytical and theoretical study of the spectralprecoding approaches in the literature, we believe it is time to investigate the practicality and ability of spectral precoding methods to compete with traditional approaches. Consequently, we check whether spectral precoding satisfies the spectral requirements of LTE measures. We analyze the precoders' implementation complexity and provide methodologies to reduce it. We design practical spectral precoders that match with the practical OFDM transmitters, and we study spectral precoding extensibility toward MIMO (and massive MIMO) systems.

Moreover, in this work, we introduce the first proof-of-concept prototype of spectrally precoded OFDM. In the prototype, we use software-defined radios (SDRs) to perform a real-time examination of how spectral precoding improves the spectral containment of OFDM systems.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords
OFDM, spectral precoding, out of band emission, 5G
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-71971 (URN)978-91-7790-282-9 (ISBN)978-91-7790-283-6 (ISBN)
Public defence
2019-02-19, E632, Luleå tekniska universitet, Luleå, 13:00 (English)
Opponent
Supervisors
Funder
Swedish Research Council
Available from: 2018-12-07 Created: 2018-12-07 Last updated: 2018-12-07Bibliographically approved

Open Access in DiVA

fulltext(1318 kB)37 downloads
File information
File name FULLTEXT01.pdfFile size 1318 kBChecksum SHA-512
6886337429bf0a7661fea6314bdcd40a4521c2fb42bf973e163e1346453e78bade8a00eaf7247a480ca7f721d7aa224793a3bda659d0c6f722d564af25743077
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Mohamad, MedhatNilsson, RickardBeek, Jaap van de
By organisation
Signals and Systems
In the same journal
IEEE Transactions on Circuits and Systems Part 1: Regular Papers
Engineering and TechnologySignal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 37 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 346 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf