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BETA
Beek, Jaap van de, ProfessorORCID iD iconorcid.org/0000-0001-8647-436x
Alternative names
Publications (10 of 84) Show all publications
Mohamad, M., Nilsson, R. & Beek, J. v. (2018). A Novel Transmitter Architecture for Spectrally-Precoded OFDM. IEEE Transactions on Circuits and Systems Part 1: Regular Papers, 65(8), 2592-2605
Open this publication in new window or tab >>A Novel Transmitter Architecture for Spectrally-Precoded OFDM
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
National Category
Engineering and Technology Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-67847 (URN)10.1109/TCSI.2018.2797527 (DOI)000437882000022 ()2-s2.0-85041808007 (Scopus ID)
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
Idzikowski, F., Chiaraviglio, L., Liu, W. & Beek, J. v. (2018). Future Internet Architectures and Sustainability: An Overview. In: : . Paper presented at 2018 IEEE International Conference on Environmental Engineering (EE), Milan, Italy, MAR 12-14, 2018. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Future Internet Architectures and Sustainability: An Overview
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The Internet Protocol (IP) traffic is constantly growing. The annual global IP traffic is estimated to reach 2.3 Zettabyte per year by 2020 according to the recent Cisco forecasts. New Internet infrastructures are required to handle the emerging Big Data. Several pilot initiatives have proposed Future Internet (FI) architectures. We provide an overview of the FI architectures from the perspective of sustainable development.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-70236 (URN)10.1109/EE1.2018.8385276 (DOI)000435987600029 ()2-s2.0-85049992779 (Scopus ID)978-1-5386-4182-8 (ISBN)
Conference
2018 IEEE International Conference on Environmental Engineering (EE), Milan, Italy, MAR 12-14, 2018
Available from: 2018-08-07 Created: 2018-08-07 Last updated: 2018-08-08Bibliographically approved
Carlson, J. E., Andren, E., Mohamad, M. & Beek, J. v. (2018). Monitoring Changes in Mechanical Properties of Rock Bolts Using a Low-Power Coded-Excitation Scheme. In: 2018 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS): . Paper presented at 2018 IEEE International Ultrasonics Symposium, IUS 2018; Kobe; Japan; 22-25 Oct 2018. IEEE, Article ID 8580038.
Open this publication in new window or tab >>Monitoring Changes in Mechanical Properties of Rock Bolts Using a Low-Power Coded-Excitation Scheme
2018 (English)In: 2018 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), IEEE, 2018, article id 8580038Conference paper, Published paper (Refereed)
Abstract [en]

In-situ inspection and quality assessment of rock bolts and other load-bearing structural elements, has received significant attention over the years, but there are still no techniques available capable of monitoring changes over time in mechanical properties of already installed bolts. Since mechanical changes will also affect the propagation of mechanical waves, ultrasound is a strong candidate. In this paper we propose a technique based on Orthogonal Frequency Division Multiplexing (OFDM) for coding the transmitted ultrasound pulse in such a way that the propagation channel (transducer and rock bolt combined) can be estimated. We show that a transmit voltage of 1.1 V r.m.s. is sufficient to obtain reliable channel estimates even in bolts as long as one meter. The channel estimates are then used to predict changes in tensile stress on the bolt, from experiments conducted in a laboratory environment.

Place, publisher, year, edition, pages
IEEE, 2018
Series
IEEE International Ultrasonics Symposium, ISSN 1948-5719, E-ISSN 48-5727
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-72802 (URN)10.1109/ULTSYM.2018.8580038 (DOI)000458693001081 ()2-s2.0-85060589109 (Scopus ID)978-1-5386-3425-7 (ISBN)978-1-5386-3426-4 (ISBN)
Conference
2018 IEEE International Ultrasonics Symposium, IUS 2018; Kobe; Japan; 22-25 Oct 2018
Available from: 2019-02-06 Created: 2019-02-06 Last updated: 2019-03-11Bibliographically approved
Taheri, T., Nilsson, R. & Beek, J. v. (2018). Quasi-Cyclic Symbol Extensions for Shaping the OFDM Spectrum. IEEE Transactions on Wireless Communications, 17(10), 7054-7066
Open this publication in new window or tab >>Quasi-Cyclic Symbol Extensions for Shaping the OFDM Spectrum
2018 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 17, no 10, p. 7054-7066Article in journal (Refereed) Published
Abstract [en]

N-continuous orthogonal frequency division multiplexing (OFDM) is a promising solution to the outof- band (OOB) emission issue in OFDM systems where the Nth-order continuity between OFDM symbols leads to lower OOB emission than the plain OFDM, however, high self-interference in such systems is an obstacle. In this paper we propose a new class of quasi-cyclic symbol extensions which makes the OFDM system N- continuous. The new extension leads to low OOB emission while the additive interference is less than other N-continuous OFDM systems. Moreover, we propose a general analysis of the spectrum and interference that occurs in a linear precoded OFDM system. The framework is applicable to many N-continuous OFDM systems including our proposed method.

Place, publisher, year, edition, pages
IEEE, 2018
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-70580 (URN)10.1109/TWC.2018.2865566 (DOI)000447047200048 ()
Note

Validerad;2018;Nivå 2;2018-10-10 (inah)

Available from: 2018-08-24 Created: 2018-08-24 Last updated: 2018-12-11Bibliographically approved
Chiaraviglio, L., Blefari-Melazzi, N., Liu, W., Gutierrez, J. A., van de Beek, J., Birke, R., . . . Wu, J. (2017). 5G in rural and low-income areas: Are we ready?. In: Proceedings of the 8th ITU Kaleidoscope academic conference: ICTs for a Sustainable World. Paper presented at 8th ITU Kaleidoscope academic conference, Bangkok, Thailand, 14-16 November 2016 (pp. 99-106). Piscataway, NJ: IEEE Communications Society, Article ID 7805720.
Open this publication in new window or tab >>5G in rural and low-income areas: Are we ready?
Show others...
2017 (English)In: Proceedings of the 8th ITU Kaleidoscope academic conference: ICTs for a Sustainable World, Piscataway, NJ: IEEE Communications Society, 2017, p. 99-106, article id 7805720Conference paper, Published paper (Refereed)
Abstract [en]

Current trends in telecommunication networks foresee the adoption of the,fifth generation (5G) of wireless networks in the near fixture. However; a large number of people are living without coverage and connectivity. To face this issue, we consider the possibility of deploying 5G networks in rural and low-income zones. After detailing the current state-of-the-art, we consider the main challenges that need to be faced. Moreover; we define the main pillars to follow in order to deploy 5G networks in such zones, as well as a proposal of a future network architecture.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 2017
National Category
Engineering and Technology Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-60737 (URN)000392631800013 ()2-s2.0-85014221496 (Scopus ID)978-9-2612-0451-8 (ISBN)
Conference
8th ITU Kaleidoscope academic conference, Bangkok, Thailand, 14-16 November 2016
Available from: 2016-11-28 Created: 2016-11-28 Last updated: 2017-11-24Bibliographically approved
Mohamad, M., Nilsson, R. & van de Beek, J. (2017). An SDR-based prototype of spectrally-precoded OFDM. In: EuCNC 2017: European Conference on Networks and Communications. Paper presented at European Conference on Networks and Communications (EuCNC 2017), Oulu, Finland, 12-15 June 2017. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), Article ID 7980758.
Open this publication in new window or tab >>An SDR-based prototype of spectrally-precoded OFDM
2017 (English)In: EuCNC 2017: European Conference on Networks and Communications, Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017, article id 7980758Conference paper, Published paper (Refereed)
Abstract [en]

Spectrally precoded OFDM is a recent approach that aims for the suppression of the OOB, as well as the in-band gap, emissions in OFDM systems. Theoretically, the technique shows High suppression of the OOB and the in-band gap emissions. Although, practically hardware impairments may limit the precoder's performance. Yet, this demonstration shows that despite the hardware impairments, implemented spectrally precoded OFDM generates emissions tens of decibels less than that of plain OFDM. Therefore, the demonstration proves that communications links are less vulnerable to interference coming from spectrally precoded OFDM signals than to interference coming from plain OFDM signals

Place, publisher, year, edition, pages
Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-64716 (URN)10.1109/EuCNC.2017.7980758 (DOI)000425922900118 ()2-s2.0-85039935034 (Scopus ID)978-1-5386-3873-6 (ISBN)
Conference
European Conference on Networks and Communications (EuCNC 2017), Oulu, Finland, 12-15 June 2017
Available from: 2017-07-01 Created: 2017-07-01 Last updated: 2018-12-07Bibliographically approved
Chiaraviglio, L., Blefari-Melazzi, N., Liu, W., Gutiérrez, J. A., van de Beek, J., Birke, R., . . . Wu, J. (2017). Bringing 5G into Rural and Low-Income Areas: Is It Feasible?. IEEE Communications Standards Magazine, 1(3), 50-57
Open this publication in new window or tab >>Bringing 5G into Rural and Low-Income Areas: Is It Feasible?
Show others...
2017 (English)In: IEEE Communications Standards Magazine, ISSN 2471-2825, Vol. 1, no 3, p. 50-57Article in journal (Refereed) Published
Abstract [en]

Nowadays, at least two billion people are experiencing a complete lack of wireless cellular network coverage. These users live in rural areas and low-income regions, where network operators are not keen to invest, mainly due to high capital expenditure and operational expenditure costs, as well as the scarcity of electricity from the grid. We tackle this challenge by proposing a 5G network explicitly designed to serve rural and low-income areas. Our solution investigates the possibility of mounting remote radio heads on top of unmanned aerial vehicles, as well as large cells (LCs) to increase the coverage range. In addition, 5G nodes are powered by solar panels and batteries. Preliminary results, obtained over three representative case studies located in Italy, Cook Islands, and Zimbabwe, show that providing connectivity in rural and low-income areas by means of the proposed 5G architecture is feasible. At the same time, we also show that the monthly subscription fee paid by the users can be kept sufficiently low, that is, less than €1/month in low-income areas, and around €11/month in rural regions.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017
National Category
Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-66350 (URN)10.1109/MCOMSTD.2017.1700023 (DOI)
Available from: 2017-11-01 Created: 2017-11-01 Last updated: 2018-08-15Bibliographically approved
Tayebeh, T., Nilsson, R. & van de Beek, J. (2017). Hybrid spectral precoding/windowing for low-latency OFDM. In: : . Paper presented at IEEE 85th Vehicular Technology Conference (VTC Spring), Sydney, Australia, 4-7 Juni 2017. Piscataway, MJ: Institute of Electrical and Electronics Engineers (IEEE), Article ID 8108399.
Open this publication in new window or tab >>Hybrid spectral precoding/windowing for low-latency OFDM
2017 (English)Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we present a joint precoded and windowed OFDM system. This new hybrid method provides flexibility to suppress the out-of band (OOB) emission in non-contiguous OFDM systems used in cognitive radio. This method also provides the possibility of shortening the cyclic prefix without sacrificing the OOB emission or increasing the additional interference which is the case in low-latency future systems.

Place, publisher, year, edition, pages
Piscataway, MJ: Institute of Electrical and Electronics Engineers (IEEE), 2017
Series
IEEE Vehicular Technology Conference Proceedings, ISSN 1550-2252
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ltu:diva-64717 (URN)10.1109/VTCSpring.2017.8108399 (DOI)000426875801040 ()2-s2.0-85040610539 (Scopus ID)9781509059324 (ISBN)
Conference
IEEE 85th Vehicular Technology Conference (VTC Spring), Sydney, Australia, 4-7 Juni 2017
Available from: 2017-07-01 Created: 2017-07-01 Last updated: 2018-05-22Bibliographically approved
Carlson, J., van de Beek, J. & Mohamad, M. (2017). Mbit/second Communication through a Rock Bolt Using Ultrasound. In: : . Paper presented at 2017 IEEE International Ultrasonics Symposium (IUS), Washington D.C., 6-9 Sept. 2017. Piscataway, NJ: IEEE, Article ID 8092454.
Open this publication in new window or tab >>Mbit/second Communication through a Rock Bolt Using Ultrasound
2017 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

In most industrial processes transfer of data and software from or to sensors is an essential part of the monitoring and control systems. Many of the older, wired communication systems have been or are being replaced with wireless alternatives. A number of challenges are associated with this replacement: Radio receivers are subject to interference from other radio sources. Similarly, radio transmitters may cause undesired interference into other equipment and environments. Compared to wired solutions, security becomes an issue as radio communication links are more vulnerable to eavesdropping than wired schemes. Radio communication with sensors and sensor platforms embedded deep inside large metal structures or fluid tanks may be difficult or even impossible. The objective of this work is to develop and evaluate a high data-rate communications scheme based on ultrasound, which can be used to transmit wirelessly through solid structures. An example will be given using a one-meter segment of a rock bolt.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2017
Series
IEEE International Ultrasonics Symposium, ISSN 1948-5719, E-ISSN 1948-5727
Keywords
Ultrasonic imaging, Rocks, Fasteners, Sensors, Radio communication, Interference, Channel estimation
National Category
Signal Processing Telecommunications
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-66541 (URN)10.1109/ULTSYM.2017.8092454 (DOI)2-s2.0-85039419149 (Scopus ID)978-1-5386-3383-0 (ISBN)
Conference
2017 IEEE International Ultrasonics Symposium (IUS), Washington D.C., 6-9 Sept. 2017
Available from: 2017-11-10 Created: 2017-11-10 Last updated: 2018-12-07Bibliographically approved
Carlson, J., van de Beek, J. & Mohamad, M. (2017). Mbit/second Communication through a Rock Bolt Using Ultrasound. In: IEEE International Ultrasonics Symposium, IUS: . Paper presented at 2017 IEEE International Ultrasonics Symposium (IUS), Washington D.C., 6-9 Sept. 2017. Piscataway, NJ: IEEE Computer Society, Article ID 8092474.
Open this publication in new window or tab >>Mbit/second Communication through a Rock Bolt Using Ultrasound
2017 (English)In: IEEE International Ultrasonics Symposium, IUS, Piscataway, NJ: IEEE Computer Society, 2017, article id 8092474Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a digital communication system based on Orthogonal Frequency Division Multiplexing (OFDM) and MHz-range ultrasound, for transmission of data through solid materials and liquids. The system is tested on experiments using a off-the-shelf ultrasound transducers with a center frequency of 3.5 MHz as transmitter and receiver, respectively. The propagation medium in the experiment was a 1 m long section of an epoxy coated steel rock bolt. The results show that data rates in excess of 1 Mbit/second is attainable, using readily available hardware and software.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Computer Society, 2017
Series
IEEE International Ultrasonics Symposium, ISSN 1948-5719, E-ISSN 1948-5727
National Category
Signal Processing Telecommunications
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-65477 (URN)10.1109/ULTSYM.2017.8092474 (DOI)000416948402010 ()978-1-5386-3383-0 (ISBN)978-1-5386-3384-7 (ISBN)
Conference
2017 IEEE International Ultrasonics Symposium (IUS), Washington D.C., 6-9 Sept. 2017
Available from: 2017-09-04 Created: 2017-09-04 Last updated: 2018-12-07Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8647-436x

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