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Stefan Parkvall

Bio: Stefan Parkvall is an academic researcher from Ericsson. The author has contributed to research in topics: Telecommunications link & Node (networking). The author has an hindex of 58, co-authored 502 publications receiving 19083 citations. Previous affiliations of Stefan Parkvall include Royal Institute of Technology & University of California, San Diego.


Papers
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Patent
10 Dec 2010
TL;DR: In this article, the authors propose a method realisation approach for a communication system consisting of at least one control component of radio network and one or more components of basic station arranged with the possibility to realize scheme of upperlink planning relative to one or multiple subscriber terminals.
Abstract: FIELD: information technologies. ^ SUBSTANCE: communication system comprises at least one control component of radio network and one or more components of basic station arranged with the possibility to realise scheme of upperlink planning relative to one or more subscriber terminals. Version of method realisation includes stages, at which at least one parametre of noise control is received with the help of one of basic station components at least from one control component of radio network, one or more presentations of planning are generated, taking into account at least one parametre of noise control, and one or more presentations of planning are issued for one or more subscriber terminals. ^ EFFECT: distribution of radio resources. ^ 22 cl, 11 dwg

1 citations

Patent
29 Jan 2020
TL;DR: In this article, a method of operating a radio node in a Radio Access Network, the method including communicating utilizing frequency resources based on allocation information received in a message, the message having an allocation information structure containing the allocation information.
Abstract: There is disclosed a method of operating a radio node in a Radio Access Network, the method including communicating utilizing frequency resources based on allocation information received in a message, the message having an allocation information structure containing the allocation information.

1 citations

Patent
Stefan Parkvall, Richard Abrahamsson, Ismet Aktas, Peter Alriksson, Junaid Ansari, Ashraf Shehzad Ali, Henrik Asplund, Fredrik Athley, Håkan Axelsson, Joakim Axmon, Johan Axnäs, Kumar Balachandran, Baldemair Robert, Gunnar Bark, Jan-Erik Berg, Andreas Bergström, Håkan Björkegren, Nadia Brahmi, Cagatay Capar, Anders Carlsson, Andreas Cedergren, Mikael Coldrey, Da Silva Icaro L J, Erik Dahlman, El Essaili Ali, Ulrika Engström, Mårten Ericson, Erik Eriksson, Mikael Fallgren, Fan Rui, Gabor Fodor, Pål Frenger, Jonas Fridén, Olsson Jonas Fröberg, Anders Furuskär, Johan Furuskog, Virgile Garcia, Ather Gattami, Fredrik Gunnarsson, Ulf Gustavsson, Bo Hagerman, Fredrik Harrysson, Ning He, Hessler Martin, Kimmo Hiltunen, Song-Nam Hong, Dennis Hui, Jörg Huschke, Tim Irnich, Sven Jacobsson, Niklas Jaldén, Simon Järmyr, Zhiyuan Jiang, Martin Johansson, Niklas Johansson, Du Ho Kang, Eleftherios Karipidis, Patrik Karlsson, Ali S. Khayrallah, Caner Kilinc, Göran N. Klang, Jonas Kronander, Sara Landström, Christina Larsson, Li Gen, Bo Lincoln, Lars Lindbom, Robert Lindgren, Bengt Lindoff, Fredrik Lindqvist, Liu Jinhua, Thorsten Lohmar, Qianxi Lu, Lars Manholm, Ivana Maric, Jonas Medbo, Qingyu Miao, Gunnar Mildh, Reza Moosavi, Walter Müller, Elena Myhre, Johan Nilsson, Karl Norrman, Bengt-Erik Olsson, Torgny Palenius, Janne Peisa, Sven Petersson, Jose Luis Pradas, Mikael Prytz, Olav Queseth, Pradeepa Ramachandra, Edgar Ramos, Andres Reial, Thomas Rimhagen, Emil Ringh, Patrik Rugeland, Johan Rune, Joachim Sachs, Henrik Sahlin, Vidit Saxena, Nima Seifi, Yngve Selén, Eliane Semaan, Sachin Sharma, Shi Cong, Johan Sköld, Magnus Stattin, Anders Stjernman, Dennis Sundman, Lars Sundström, Tercero Vargas Miurel Isabel, Claes Tidestav, Sibel Tombaz, Johan Torsner, Hugo Tullberg, Jari Vikberg, Von Wrycza Peter, Stefan Wager, Thomas Walldeen, Anders Wallèn, Pontus Wallentin, Wang Hai, Wang Helmersson Ke, Wang Jianfeng, Wang Yi Pin Eric, Karl Werner, Niclas Wiberg, Wittenmark Emma, Osman Nuri Can Yilmaz, Ali A. Zaidi, Zhang Zhan, Zhang Zhang, Zheng Yanli 
31 Jan 2019
TL;DR: In this paper, the authors proposed a method to improve the quality of the service provided by the service provider, which is based on the concept of "quality of service" (QoS).
Abstract: 휴면 모드에서 동작하는 유저 장비와 같은 무선 디바이스에 의해 수행되는 방법은, 사전 결정된 세트의 자원으로부터 각각의 복수의 자원에 대한 측정을 수행하거나 또는 세트의 빔과 같은 사전 결정된 세트의 자원으로부터 각각의 복수의 자원으로부터 정보를 복조 및 디코딩한다 방법은, 사전 결정된 기준에 대항해서 각각의 복수의 자원에 대한 측정 또는 복조된 및 디코딩된 정보를 평가하고, 사전 결정된 기준이 충족되는 결정에 응답해서, 측정의 수행 및 평가를 중단, 또는 정보의 복조 및 디코딩 및 평가를 중단하여, 사전 결정된 세트의 자원 내의 하나 이상의 자원이 측정 또는 복조 및 디코딩되지 않도록 하는 것을 더 포함한다 방법은, 사전 결정된 기준이 충족되는 결정에 더 응답해서, 수신기 회로를 비활성화하는 것을 더 포함한다 방법은, 제1의 다운링크 서브프레임에서, 제1의 수비학에 따라 포맷된 제1의 직교 주파수-분할 멀티플렉싱(OFDM) 전송을 수신하고, 제2의 다운링크 서브프레임에서, 제2의 수비학에 따라서 포맷된 제2의 OFDM 전송을 수신하며, 제2의 수비학은 제1의 수비학과 다르도록 하는 것을 더 포함한다

1 citations

Patent
11 Jul 2014
TL;DR: In this article, a first communication device (110, 121, 122, 123, 123) determines that the radio channel is available for transmitting data information to the second communication device during a time period determined by the first device, and transmits a preamble on the available radio channel after the time period.
Abstract: Embodiments herein relate to a first communication device (110; 121; 122; 123) and method therein for transmitting data information at fixed time instants on a radio channel to a second communication device (121; 122; 123; 110) in a radio communications network (100). First, the first communication device (110; 121; 122; 123) determines that the radio channel is available for transmitting data information to the second communication device (121; 122; 123; 110) during a time period determined by the first communication device (110; 121; 122; 123). Then, the first communication device (110; 121; 122; 123) transmits a preamble on the available radio channel after the time period. The first communication device (110; 121; 122; 123) thereafter transmits the data information on the available radio channel to the second communication device (121; 122; 23; 110) at a next fixed time instant following the transmission of the preamble.

1 citations

Book ChapterDOI
01 Jan 2014
TL;DR: In this article, the authors discuss different means for multi-point coordination and/or transmission to handle interference in a one-cell reuse system and discuss the more long-term interference-coordination (ICICIC) being supported since the first release of LTE.
Abstract: This chapter discusses different means for multi-point coordination and/or transmission to handle interference in a one-cell reuse system. It covers the more long term interference-coordination (ICIC) being supported since the first release of LTE, as well as the support for much more dynamic multi-point coordination and multi-point transmission/reception introduced in LTE release 11.

1 citations


Cited by
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Book
01 Jan 2005

9,038 citations

Journal ArticleDOI
Thomas L. Marzetta1
TL;DR: A cellular base station serves a multiplicity of single-antenna terminals over the same time-frequency interval and a complete multi-cellular analysis yields a number of mathematically exact conclusions and points to a desirable direction towards which cellular wireless could evolve.
Abstract: A cellular base station serves a multiplicity of single-antenna terminals over the same time-frequency interval. Time-division duplex operation combined with reverse-link pilots enables the base station to estimate the reciprocal forward- and reverse-link channels. The conjugate-transpose of the channel estimates are used as a linear precoder and combiner respectively on the forward and reverse links. Propagation, unknown to both terminals and base station, comprises fast fading, log-normal shadow fading, and geometric attenuation. In the limit of an infinite number of antennas a complete multi-cellular analysis, which accounts for inter-cellular interference and the overhead and errors associated with channel-state information, yields a number of mathematically exact conclusions and points to a desirable direction towards which cellular wireless could evolve. In particular the effects of uncorrelated noise and fast fading vanish, throughput and the number of terminals are independent of the size of the cells, spectral efficiency is independent of bandwidth, and the required transmitted energy per bit vanishes. The only remaining impairment is inter-cellular interference caused by re-use of the pilot sequences in other cells (pilot contamination) which does not vanish with unlimited number of antennas.

6,248 citations

Journal ArticleDOI
TL;DR: The gains in multiuser systems are even more impressive, because such systems offer the possibility to transmit simultaneously to several users and the flexibility to select what users to schedule for reception at any given point in time.
Abstract: Multiple-input multiple-output (MIMO) technology is maturing and is being incorporated into emerging wireless broadband standards like long-term evolution (LTE) [1]. For example, the LTE standard allows for up to eight antenna ports at the base station. Basically, the more antennas the transmitter/receiver is equipped with, and the more degrees of freedom that the propagation channel can provide, the better the performance in terms of data rate or link reliability. More precisely, on a quasi static channel where a code word spans across only one time and frequency coherence interval, the reliability of a point-to-point MIMO link scales according to Prob(link outage) ` SNR-ntnr where nt and nr are the numbers of transmit and receive antennas, respectively, and signal-to-noise ratio is denoted by SNR. On a channel that varies rapidly as a function of time and frequency, and where circumstances permit coding across many channel coherence intervals, the achievable rate scales as min(nt, nr) log(1 + SNR). The gains in multiuser systems are even more impressive, because such systems offer the possibility to transmit simultaneously to several users and the flexibility to select what users to schedule for reception at any given point in time [2].

5,158 citations

Journal ArticleDOI
TL;DR: The article consists of background material and of the basic problem formulation, and introduces spectral-based algorithmic solutions to the signal parameter estimation problem and contrast these suboptimal solutions to parametric methods.
Abstract: The quintessential goal of sensor array signal processing is the estimation of parameters by fusing temporal and spatial information, captured via sampling a wavefield with a set of judiciously placed antenna sensors. The wavefield is assumed to be generated by a finite number of emitters, and contains information about signal parameters characterizing the emitters. A review of the area of array processing is given. The focus is on parameter estimation methods, and many relevant problems are only briefly mentioned. We emphasize the relatively more recent subspace-based methods in relation to beamforming. The article consists of background material and of the basic problem formulation. Then we introduce spectral-based algorithmic solutions to the signal parameter estimation problem. We contrast these suboptimal solutions to parametric methods. Techniques derived from maximum likelihood principles as well as geometric arguments are covered. Later, a number of more specialized research topics are briefly reviewed. Then, we look at a number of real-world problems for which sensor array processing methods have been applied. We also include an example with real experimental data involving closely spaced emitters and highly correlated signals, as well as a manufacturing application example.

4,410 citations

Proceedings Article
01 Jan 1991
TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.
Abstract: It is shown that, particularly for terrestrial cellular telephony, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques. A single-cell system, such as a hubbed satellite network, is addressed, and the basic expression for capacity is developed. The corresponding expressions for a multiple-cell system are derived. and the distribution on the number of users supportable per cell is determined. It is concluded that properly augmented and power-controlled multiple-cell CDMA promises a quantum increase in current cellular capacity. >

2,951 citations