20002018
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Research Output 2000 2018

2018
29 Downloads (Pure)

Cell Splitting for Energy-Efficient Massive MIMO

Apilo, O., Lasanen, M., Wang, J. & Mämmelä, A., 2018, 2017 IEEE 86th Vehicular Technology Conference (VTC-Fall). Institute of Electrical and Electronic Engineers IEEE, 6 p.

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

Open Access
File
Energy Efficient
Multiple-input multiple-output (MIMO)
Cell
Energy efficiency
Energy Efficiency

Energy consumption of mobile data transfer – Increasing or decreasing? : Evaluating the impact of technology development & user behavior

Pihkola, H., Hongisto, M., Apilo, O., Lasanen, M. & Vatanen, S., 10 May 2018, ICT4S2018. 5th International Conference on Information and Communication Technology for Sustainability. Penzenstadler, B., Easterbrook, S., Venters, C. & Ishtiaqe Ahmed, S. (eds.). p. 301-315 (EPiC Series in Computing, Vol. 52).

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

Open Access
Data transfer
Energy utilization
Consumer behavior
Mobile devices
Life cycle
2 Citations (Scopus)
Open Access
Consumer behavior
consumption behavior
data exchange
technological development
Data transfer

Measured GPS performance under LTE-m in-device interference

Apilo, O., Hiivala, M., Kuosmonen, A., Kallankari, J., Amin, H., Lasanen, M., Berg, M. & Parssinen, A., 2018, 2018 9th ESA Workshop on Satellite NavigationTechnologies and European Workshop on GNSS Signals and Signal Processing, NAVITEC 2018. Institute of Electrical and Electronic Engineers IEEE, 7 p. (ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing, NAVITEC, Vol. 2018-December).

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

Global Positioning System
Global positioning system
System Performance
interference
Interference
17 Citations (Scopus)

Review of latest advances in 3GPP standardization: D2D communication in 5G systems and its energy consumption models

Höyhtyä, M., Apilo, O. & Lasanen, M., 3 Jan 2018, In : Future Internet. 10, 1, 18 p.

Research output: Contribution to journalReview ArticleScientificpeer-review

Open Access
Standardization
Energy utilization
Communication
Long Term Evolution (LTE)
Base stations
2016
2 Citations (Scopus)
11 Downloads (Pure)

Energy-efficient dynamic point selection and scheduling method for intra-cell CoMP in LTE-A

Apilo, O., Lasanen, M. & Mämmelä, A., 2016, In : Wireless Personal Communications. 86, 2, p. 705-726

Research output: Contribution to journalArticleScientificpeer-review

Open Access
File
Electric power utilization
Scheduling
Energy efficiency
Antennas
Multiplexing
4 Citations (Scopus)
12 Downloads (Pure)

Unequal power amplifier dimensioning for adaptive massive MIMO base stations

Apilo, O., Lasanen, M. & Mämmelä, A., 7 Jul 2016, Proceedings : 2016 IEEE 83rd Vehicular Technology Conference (VTC Spring). Institute of Electrical and Electronic Engineers IEEE, 6 p.

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

Open Access
File
Power amplifiers
Base stations
Antennas
Power transmission
Electric power utilization
2015

Critical technologies towards 5G

Lasanen, M. (ed.), Anttonen, A., Apilo, O., Aurinsalo, J., Boumard, S., Chen, X., Chen, T., Dufva, T., Evesti, A., Hekkala, A., Hiivala, M., Horsmanheimo, S., Höyhtyä, M., Järvensivu, P., Kim, H., Kotelba, A., Maskey, N., Matinmikko, M., Mustonen, M., Mämmelä, A. & 12 others, Mämmelä, O., Ojanperä, T., Paaso, H., Palola, M., Pinola, J., Piri, E., Rautio, T., Ruponen, S., Sten, J., Suomalainen, J., Tuomimäki, L. & Vehkaperä, J., 2015, VTT Technical Research Centre of Finland. 66 p. (Research Results Report).

Research output: Book/ReportReportProfessional

Wireless networks
Critical infrastructures
Thermal noise
Electric power distribution
Millimeter waves

Esiselvitys matkaviestinverkkojen tukiasemien sähkön käytöstä ja energiatehokkuudesta

Apilo, O., Hongisto, M. & Lasanen, M., 2015, VTT Technical Research Centre of Finland. 46 p. (Asiakasraportti, Vol. VTT-CR-03348-15).

Research output: Book/ReportReportProfessional

Open Access

Reciprocally opportunistic spectrum access

Chen, X., Zhang, H., Höyhtyä, M., Lasanen, M. & Palicot, J., 2015, In : Transactions on Emerging Telecommunications Technologies. 26, 8, p. 1073-1085

Research output: Contribution to journalArticleScientificpeer-review

Cognitive radio
Learning algorithms
Intelligent agents
Decision making
Network protocols
2014
2 Citations (Scopus)

Exponential companding and active constellation extension comparisons for PAPR reduction

Hekkala, A., Boumard, S. & Lasanen, M., 2014, Proceedings: 26th International Teletraffic Congress, ITC 26, 2014. Institute of Electrical and Electronic Engineers IEEE, 5 p.

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

Orthogonal frequency division multiplexing
Energy efficiency
Nonlinear distortion
Communication
1 Citation (Scopus)

Greenly offloading traffic in stochastic heterogeneous cellular networks

Chen, X., Chen, T., Wu, S. & Lasanen, M., 2014, Proceedings: 1st International Workshop on Cognitive Cellular Systems, CCS 2014. Institute of Electrical and Electronic Engineers IEEE, 5 p.

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

Quality of service
Energy utilization
Statistics
Controllers
Reinforcement learning
1 Citation (Scopus)

Power consumption trade-off between power amplifier OBO, DPD, and clipping and filtering

Boumard, S., Lasanen, M., Apilo, O., Hekkala, A., Cassan, C., Verdeil, J-P., David, J. & Pichon, L., 2014, Proceedings: 26th International Teletraffic Congress, ITC 2014. Institute of Electrical and Electronic Engineers IEEE, 5 p.

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

Power amplifiers
Electric power utilization
Femtocell
Digital circuits
Linearization
2013
1 Citation (Scopus)

Combined learning for energy efficiency in heterogeneous cellular networks

Chen, X., Zhang, H. & Lasanen, M., 2013, Green Cellular 2013: 24th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC Workshops 2013. Institute of Electrical and Electronic Engineers IEEE, p. 21-25

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

Learning algorithms
Energy efficiency
1 Citation (Scopus)

Energy efficiency of power-adaptive spatial diversity methods

Apilo, O., Lasanen, M., Boumard, S. & Mämmelä, A., 2013, In : IEEE Transactions on Wireless Communications. 12, 9, p. 4246-4257 11 p.

Research output: Contribution to journalArticleScientificpeer-review

Diversity Methods
Spatial Diversity
Power Amplifier
Power amplifiers
Energy Efficiency
7 Citations (Scopus)

Environmental friendly mobile radio networks: Approaches of the European OPERA-Net 2 project

Lasanen, M., Aubree, M., Cassan, C., Conte, A., David, J., Elayoubi, S-E., Galkin, T., Grigore, V., le Masson, S., Lees, J., Louahlia-Gualous, H., Marquet, D., Mokhti, Z., Nuaymi, L., Scheck, H-O. & Smalen, L., 2013, 20th International Conference on Telecommunications (ICT 2013). Institute of Electrical and Electronic Engineers IEEE, 5 p.

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

Telecommunication industry
Heterogeneous networks
Telecommunication networks
Environmental impact
22 Citations (Scopus)

Improving energy efficiency in green femtocell networks: A hierarchical reinforcement learning framework

Chen, X., Zhang, H., Chen, T. & Lasanen, M., 2013, 2013 IEEE International Conference on Communications (ICC). Institute of Electrical and Electronic Engineers IEEE, p. 2241-2245

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

Femtocell
Reinforcement learning
Energy efficiency
Learning algorithms
Game theory
2 Citations (Scopus)

The distribution of link distances in distributed multiple-input multiple-output cellular systems

Apilo, O., Lasanen, M., Boumard, S. & Mämmelä, A., 2013, 2013 IEEE 77th Vehicular Technology Conference: VTC Spring. Institute of Electrical and Electronic Engineers IEEE

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

Base stations
Power transmission
Probability density function
Signal to noise ratio
Topology
2012

Compensation of impairments in the radio over fiber infrastructure

Hekkala, A., Lasanen, M., Hiivala, M., Vieira, L., Gomes, N. J., Kotzsch, V. & Fettweis, G., 2012, Next generation wireless communications using radio over fiber. Wiley, p. 211-246

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleScientificpeer-review

Radio-over-fiber
Nonlinear distortion
Orthogonal frequency division multiplexing
Transmitters
Signal processing
4 Citations (Scopus)

Novel digital compensation approaches for envelope tracking amplifiers

Hekkala, A., Kotelba, A., Lasanen, M., Järvensivu, P. & Mämmelä, A., 2012, In : Wireless Personal Communications. 62, 1, p. 55-77 23 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Compensation and Redress
40 Citations (Scopus)

Predistortion of radio over fiber links: Algorithms, implementation, and measurements

Hekkala, A., Hiivala, M., Lasanen, M., Perttu, J., Luis, V., Gomes, N. & Anthony, N., 2012, In : IEEE Transactions on Circuits and Systems I: Regular Papers. 59, 3, p. 664-672 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Radio-over-fiber
Telecommunication links
Antennas
Nonlinear distortion
Optoelectronic devices

Trends in wireless communications

Mämmelä, A., Lasanen, M. & Pinola, J., 2012, Next Generation Wireless Communications Using Radio over Fiber. Wiley, p. 17-46

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleScientificpeer-review

Network layers
Radio systems
Energy resources
Standardization
Energy efficiency
2011
1 Citation (Scopus)

Average efficiency of power amplifiers in power-controlled systems with multi-antenna diversity

Apilo, O., Lasanen, M., Mämmelä, A. & Jondral, F. K., 2011, 2011 Wireless Telecommunications Symposium (WTS). Institute of Electrical and Electronic Engineers IEEE, p. 1-6

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

Power amplifiers
Antennas
Power control
Orthogonal frequency division multiplexing

Predistortion compensation of radio-over-fiber links

Lasanen, M., Hekkala, A. & Hiivala, M., 2011.

Research output: Contribution to conferenceConference articleScientificpeer-review

2010
29 Citations (Scopus)

Analysis of and compensation for non-ideal RoF links in DAS

Hekkala, A., Lasanen, M., Harjula, I., Vieira, L. C., Gomes, N. J., Nkansah, A., Bittner, S., Diehm, F. & Kotzsch, V., 2010, In : IEEE Wireless Communications. 17, 3, p. 52-59 9 p.

Research output: Contribution to journalArticleScientificpeer-review

Telecommunication links
Antennas
Radio-over-fiber
Communication
Costs
17 Citations (Scopus)

Architectures for joint compensation of RoF and PA with nonideal feedback

Hekkala, A., Lasanen, M., Vieira, L. C., Gomes, N. J. & Nkansah, A., 2010, 2010 IEEE 71st Vehicular Technology Conference.

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

Radio-over-fiber
Fiber amplifiers
Power amplifiers
Feedback
Nonlinear distortion

Low-complexity channel estimation for superimposed pilots in distributed OFDMA systems

Hiivala, M., Harjula, I. & Lasanen, M., 2010, 2010 Wireless Telecommunications Symposium, WTS 2010. 5479650

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

Channel estimation
Antennas
Bit error rate
Data communication systems
Hardware
4 Citations (Scopus)

Predistortion study of radio over fibre link

Hekkala, A., Perttu, J., Lasanen, M., Vieira, L. & Gomes, N., 2010, 2010 Future Network & Mobile Summit. Institute of Electrical and Electronic Engineers IEEE, 8 p.

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

Radio-over-fiber
Nonlinear distortion
Power amplifiers
Field programmable gate arrays (FPGA)
Energy utilization
2009

Applying WiMAX in new scenarios: Limitations of the physical layer and possible solutions

Harjula, I., Cardamone, P., Weissenfelt, M., Lasanen, M., Boumard, S., Byman, A. & Katz, M., 2009, WiMAX Evolution: Emerging Technologies and Applications. UK: Wiley, p. 367-385

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleScientificpeer-review

1 Citation (Scopus)

Implementation and performance of low complexity SIMO OFDM timing synchronization

Lasanen, M., Weissenfelt, M., Perttu, J. & Byman, A., 2009, 2009 Wireless Telecommunications Symposium. Institute of Electrical and Electronic Engineers IEEE

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

Orthogonal frequency division multiplexing
Synchronization
Information use
Base stations
Antennas
17 Citations (Scopus)

Performance of adaptive algorithms for compensation of radio over fiber links

Hekkala, A. & Lasanen, M., 2009, 2009 Wireless Telecommunications Symposium. Institute of Electrical and Electronic Engineers IEEE, p. 1-5

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

Radio-over-fiber
Adaptive algorithms
Nonlinear distortion
Linear systems
Compensation and Redress
2008
7 Citations (Scopus)

Adaptive predistortion architecture for nonideal radio transmitter

Lasanen, M., Kotelba, A., Hekkala, A., Järvensivu, P. & Mämmelä, A., 2008, IEEE Vehicular Technology Conference: VTC Spring 2008. Institute of Electrical and Electronic Engineers IEEE, p. 1256-1260

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

3 Citations (Scopus)

Adaptive time misalignment compensation in envelope tracking amplifiers

Hekkala, A., Lasanen, M. & Kotelba, A., 2008, 2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications. Institute of Electrical and Electronic Engineers IEEE, p. 761-765

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

Degradation
Compensation and Redress
5 Citations (Scopus)

Compensation of linear and nonlinear distortions in envelope tracking amplifier

Kotelba, A., Hekkala, A. & Lasanen, M., 2008, 19th International Symposium on Personal, Indoor and Mobile Radio Communications. Cannes, France, 15 - 18 Sept. 2008. Piscataway, NJ, USA: Institute of Electrical and Electronic Engineers IEEE, p. 5

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

Nonlinear distortion
Tuning
Control theory
Compensation and Redress
2004

A simulation study on time-frequency localized CDMA Using MMSE per carrier equalization

Lasanen, M., Anttonen, A. & Nissilä, M., 2004, 2003 IEEE 58th Vehicular Technology Conference. Institute of Electrical and Electronic Engineers IEEE, Vol. 3. p. 1833-1837

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

2002

Timing synchronization of the WIND-FLEX OFDM prototype

Lasanen, M., Rautio, J. & Nissilä, M., 2002, Proceedings of IST Mobile and Wireless Telecommunications Summit. p. 348-352 5 p.

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

Orthogonal frequency division multiplexing
Synchronization
2000

Main approaches for the design of wireless indoor flexible high bit rate WIND-FLEX modem architecture

Saarinen, I., Lasanen, M., Ruuska, P., Girola, G., Caverni, A., Torregani, M., Garcia, J. L. & Armada, A. G., 2000, Proceedings of the IST Mobile Communications Summit 2000. p. 51-56 6 p.

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

Modems
Ad hoc networks
Orthogonal frequency division multiplexing
Internet