Review of channel estimation for candidate waveforms of next generation networks.

Show simple item record Ijiga, O.E. Ogundile, O.O. Familua, A.D. Versfeld, D.J.J. 2019-11-15T10:14:38Z 2019-11-15T10:14:38Z 2019-09
dc.identifier.citation Ijiga, O.E. 2019. Review of channel estimation for candidate waveforms of next generation networks. Electronics 8(9), Article number 956. DOI: 10.3390/electronics8090956 en_ZA
dc.identifier.issn 20799292
dc.description Review article en_ZA
dc.description.abstract The advancement in wireless communication applications encourages the use of effective and efficient channel estimation (CE) techniques because of the varying behaviour of the Rayleigh fading channel. In most cases, the emphasis of most proposed CE schemes is to improve the CE performance and complexity for ensuring quality signal reception and improved system throughput. Candidate waveforms whose designs are based on filter bank multi-carrier (FBMC) modulation techniques such as filter bank orthogonal frequency division multiplexing based on offset quadrature amplitude modulation (OFDM-OQAM), universal filtered multicarrier (UFMC) and generalised frequency division multiplexing based on offset quadrature amplitude modulation (GFDM-OQAM) are no exception to the use of these proposed CE techniques in the literature. These schemes are considered as potential waveform candidates for the physical/media access control layer of the emerging fifth generation (5G) networks. Therefore, pinpoint CE techniques represent an important requirement for these waveforms to attain their full potentials. In this regard, this paper reviews the concept of CE as applicable to these waveforms as well as other waveform candidates under consideration in the emerging 5G networks. Since the design of the majority of the waveform candidates is filter based, a review of the general filter design considerations is presented in this paper. Secondly, we review general CE techniques for candidate waveforms of next generation networks and classify some of the studied CE techniques. In particular, we classify the CE schemes used in filter bank OFDM-OQAM and GFDM-OQAM based transceivers and present a performance comparison of some of these CE schemes. Besides, the paper reviews the performances of two linear CE schemes and three adaptive based CE schemes for two FBMC based waveform candidates assuming near perfect reconstruction (NPR) and non-perfect reconstruction (Non-PR) filter designs over slow and fast frequency selective Rayleigh fading channels. The results obtained are documented through computer simulations, where the performances of the studied CE schemes in terms of the normalised mean square error (NMSE) are analysed. Lastly, we summarise the findings of this work and suggest possible research directions in order to improve the potentials of the studied candidate waveforms over Rayleigh fading channels. en_ZA
dc.description.sponsorship Financial assistance of the National Research Foundation (NRF). en_ZA
dc.language.iso en en_ZA
dc.publisher MDPI en_ZA
dc.rights c 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) en_ZA
dc.subject 5G waveforms en_ZA
dc.subject Channel estimation en_ZA
dc.subject Channel fading en_ZA
dc.subject Filter bank en_ZA
dc.subject Next generation networks en_ZA
dc.subject Non-PR en_ZA
dc.subject NPR en_ZA
dc.title Review of channel estimation for candidate waveforms of next generation networks. en_ZA
dc.type Article en_ZA
dc.journal.volume 8 en_ZA
dc.journal.title Electronics en_ZA
dc.description.librarian MvdH en_ZA
dc.citation.doi 10.3390/electronics8090956 en_ZA
dc.citation.issue 9 en_ZA
dc.funder National Research Foundation en_ZA 0000-0001-8460-4140 en_ZA en_ZA

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