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Institution

Nokia

CompanyEspoo, Finland
About: Nokia is a company organization based out in Espoo, Finland. It is known for research contribution in the topics: Signal & Mobile station. The organization has 16625 authors who have published 28347 publications receiving 695725 citations. The organization is also known as: Nokia Oyj & Oy Nokia Ab.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors discussed the improvement in the third-order intermodulation product (IM3) performance obtainable from RF and microwave amplifiers by two alternative injection techniques.
Abstract: This paper discusses the improvement in the third-order intermodulation product (IM3) performance obtainable from RF and microwave amplifiers by two alternative injection techniques. The first is the addition to the amplifier input of the second harmonics of the input spectrum and the second is the addition to the amplifier input of the difference frequencies between the spectral components of the input signal. Both techniques are considered in theory, by simulation and in practice. Both techniques give useful improvements in two-tone IM3 performance. The second harmonic technique reduced the IM3 level by 43 dB in an amplifier at 835 MHz. The difference-frequency technique gave a reduction of 48 dB in an amplifier at 880 MHz. The difference-frequency technique also gives a greater improvement for complex spectra signals.

121 citations

Proceedings ArticleDOI
02 Sep 2008
TL;DR: Developers of similar projects have to put major efforts into minimizing the delay between button activation and feedback and to make location and identification of controls and their function as simple and quick as possible.
Abstract: Wearable computing and smart clothing have attracted a lot of attention in the last years. For a variety of applications, it can be seen as potential future direction of mobile user interfaces. In this paper, we concentrate on usability and applicability issues concerned with capacitive touch input on clothing. To be able to perform user studies, we built a generic platform for attaching, e.g., capacitive sensors of different types. On top of that, several prototypes of wearable accessories and clothing and implemented various application scenarios. We report on two studies we undertook with these implementations with a user group randomly sampled at a shopping mall. We provide a significant set of guidelines and lessons learned that emerged from our experiences and those studies. Thus, developers of similar projects have to put major efforts into minimizing the delay between button activation and feedback and to make location and identification of controls and their function as simple and quick as possible. Issues that have to be treated in all designs include the requirement of one-handed interaction and that, even for minimal functionality, to find a general solution with regard to layout and button-to-function mapping is hardly possible. Additionally, in order to generate a satisfactory user experience good usability must be combined with aesthetical factors.

121 citations

Journal ArticleDOI
E. Nikula1, Antti Toskala1, E. Dahlman2, L. Girard3, Anja Klein4 
TL;DR: The FMA concept facilitates common upper-layer protocol structure as well as GSM backwards compatibility for evolution from second-generation systems to third-generation mobile radio systems, and fulfils the UMTS/IMT-2000 requirements in providing the services needed for the next millennium.
Abstract: This article presents the FRAMES multiple access (FMA) concept designed for third-generation mobile radio systems. The concept consists of two modes, TDMA-based FMA1 and CDMA-based FMA2, which have contributed to the standardization processes of third-generation systems. FMA1 uses the TDMA slot structure where spreading can be applied inside the slot or, alternatively, plain TDMA-type transmission can be used. FMA2 is a single-carrier wideband CDMA solution using a 4.096 Mchips/s basic chip rate. The FMA concept facilitates common upper-layer protocol structure as well as GSM backwards compatibility for evolution from second-generation systems to third-generation mobile radio systems. The defined concept fulfils the UMTS/IMT-2000 requirements in providing the services needed for the next millennium.

121 citations

Patent
Hannu J. Jokinen1, Esa Ihamaki1
31 Jul 2002
TL;DR: In this article, the network monitors (300) for terminals that have not been provisioned for connection to a network or service, automatically detects and recognizes (302) a terminal requiring provisioning, and dispatches (304) a notification to a provisioning server to effect such provisioning of the terminal when an unprovisioned terminal has been detected.
Abstract: The network monitors (300) for terminals that have not been provisioned for connection to a network or service, automatically detects and recognizes (302) a terminal requiring provisioning, and dispatches (304) a notification to a provisioning server to effect such provisioning of the terminal when an unprovisioned terminal has been detected.

121 citations

Proceedings ArticleDOI
05 Sep 2012
TL;DR: Two methods for device pose classification and walking speed estimation that generalize well to new users are described and evaluated, compared to previous work.
Abstract: We describe and evaluate two methods for device pose classification and walking speed estimation that generalize well to new users, compared to previous work. These machine learning based methods are designed for the general case of a person holding a mobile device in an unknown location and require only a single low-cost, low-power sensor: a triaxial accelerometer. We evaluate our methods in straight-path indoor walking experiments as well as in natural indoor walking settings. Experiments with 14 human participants to test user generalization show that our pose classifier correctly selects among four device poses with 94% accuracy compared to 82% for previous work, and our walking speed estimates are within 12-15% (straight/indoor walk) of ground truth compared to 17-22% for previous work. Implementation on a mobile phone demonstrates that both methods can run efficiently online.

121 citations


Authors

Showing all 16635 results

NameH-indexPapersCitations
Federico Capasso134118976957
Andreas Richter11076948262
Shunpei Yamazaki109347666579
Jinsong Huang10529049042
Marc Pollefeys9860136463
Merouane Debbah9665241140
Benjamin J. Eggleton92119534486
Jérôme Faist9197037221
Jean-Pierre Hubaux9041535837
Bernd Girod8760432298
Howard E. Katz8747527991
J.J. Garcia-Luna-Aceves8660225151
Ramesh Raskar8667030675
Ananth Dodabalapur8539427246
Stephen A. Spector8542441705
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
202223
2021225
2020465
2019547
2018477