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Title: OFDM inspired waveforms for 5G

As the standardization activities are being formed to lay the foundation of 5G wireless networks, there is a common consensus on the need to replace the celebrated OFDM by a more effective air interface that better serves the challenging needs of 5G. The main reason that has made OFDM popular in the past is related to the fact that information symbols are carried over a number of pure tones/sinusoidal signals. Moreover, with the use of cyclic prefix (CP), it is assured that the information carrying tones are only affected by the channel (complex) gains at the respective frequencies. Accordingly, the channel effect can be trivially compensated for (equalized) in the frequency domain through a single complex tap per subcarrier. However, as network air interfaces become more complex and the demand for multiuser services grows, OFDM is found to be incapable of handling the inevitable loss of synchronization among users. In the recent past, two novel waveforms (namely, GFDM and C-FBMC) have been discussed in the literature to overcome this and other drawbacks of OFDM. Interestingly, and at the same time not surprising, these methods share a common fundamental property with OFDM: each data packet is made up of a numbermore » of tones that are modulated by information symbols. In this tutorial article, we build a common framework based on the said OFDM principle and derive GFDM and C-FBMC waveforms from this point of view. This derivation provides a new prospective that facilitates straightforward understanding of channel equalization and the application of these new waveforms to MIMO channels. As a result, it also facilitates derivation of new structures for more efficient synthesis/analysis of these waveforms than those that have been reported in the literature.« less
Authors:
 [1] ;  [2]
  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Report Number(s):
INL/JOU-14-33556
Journal ID: ISSN; 1553-877X
Grant/Contract Number:
AC07-05ID14517
Type:
Accepted Manuscript
Journal Name:
IEEE Communications Surveys & Tutorials
Additional Journal Information:
Journal Volume: 18; Journal Issue: 4
Publisher:
IEEE
Research Org:
Idaho National Lab., Idaho Falls, ID (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS; wireless communication; physical layer; multi-carrier communication; OFDM; filter bank multicarrier
OSTI Identifier:
1357211

Farhang-Boroujeny, Behrouz, and Moradi, Hussein. OFDM inspired waveforms for 5G. United States: N. p., Web. doi:10.1109/COMST.2016.2565566.
Farhang-Boroujeny, Behrouz, & Moradi, Hussein. OFDM inspired waveforms for 5G. United States. doi:10.1109/COMST.2016.2565566.
Farhang-Boroujeny, Behrouz, and Moradi, Hussein. 2016. "OFDM inspired waveforms for 5G". United States. doi:10.1109/COMST.2016.2565566. https://www.osti.gov/servlets/purl/1357211.
@article{osti_1357211,
title = {OFDM inspired waveforms for 5G},
author = {Farhang-Boroujeny, Behrouz and Moradi, Hussein},
abstractNote = {As the standardization activities are being formed to lay the foundation of 5G wireless networks, there is a common consensus on the need to replace the celebrated OFDM by a more effective air interface that better serves the challenging needs of 5G. The main reason that has made OFDM popular in the past is related to the fact that information symbols are carried over a number of pure tones/sinusoidal signals. Moreover, with the use of cyclic prefix (CP), it is assured that the information carrying tones are only affected by the channel (complex) gains at the respective frequencies. Accordingly, the channel effect can be trivially compensated for (equalized) in the frequency domain through a single complex tap per subcarrier. However, as network air interfaces become more complex and the demand for multiuser services grows, OFDM is found to be incapable of handling the inevitable loss of synchronization among users. In the recent past, two novel waveforms (namely, GFDM and C-FBMC) have been discussed in the literature to overcome this and other drawbacks of OFDM. Interestingly, and at the same time not surprising, these methods share a common fundamental property with OFDM: each data packet is made up of a number of tones that are modulated by information symbols. In this tutorial article, we build a common framework based on the said OFDM principle and derive GFDM and C-FBMC waveforms from this point of view. This derivation provides a new prospective that facilitates straightforward understanding of channel equalization and the application of these new waveforms to MIMO channels. As a result, it also facilitates derivation of new structures for more efficient synthesis/analysis of these waveforms than those that have been reported in the literature.},
doi = {10.1109/COMST.2016.2565566},
journal = {IEEE Communications Surveys & Tutorials},
number = 4,
volume = 18,
place = {United States},
year = {2016},
month = {5}
}