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Jan Erik Håkegård

Seniorforsker

Jan Erik Håkegård

Seniorforsker

Jan Erik Håkegård
Telefon: 922 41 871
Mobil: 922 41 871
Avdeling: Connectivity Technologies and Platforms
Kontorsted: Trondheim

Publikasjoner og ansvarsområder

Publikasjoner

Publikasjon

Results of a Ka Band Campaign for the Characterisation of Propagation Conditions for SatCom Systems at High Latitudes

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1471607

Satellite services in the High North are utilized extensively for both communication purposes and for earth and climate observations. This paper presents results of two year measurements at 20 GHz and co-sited meteorological data. The results suggest that with 7–8 dB margin, services can be provided...

Forfattere Tjelta Terje Rytír Martin Bråten Lars Erling Grotthing Per Arne Cheffena Michael Håkegård Jan Erik
År 2017
Type Konferanseartikkel/Bokkapittel
Publikasjon

mm-Wave channel sounding using a fully programmable SoC

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1420757

The requirements for data rate and capacity in wireless communication systems have increased dramatically over the last couple of decades, and it is expected that this increase will continue in the years to come. Including higher frequency bands providing additional bandwidth is a key strategy to me...

Publikasjon

Rain attenuation estimations at high latitudes based on weather radar data

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1277787

Data from a weather radar located above the polar circle in the North Sea are used to estimate the rain attenuation for a satellite link towards a geostationary satellite operating at Ka-band. Radar reflectivity data are obtained along the slant path from a beacon receiver located close to the radar...

Forfattere Håkegård Jan Erik Rønning Snorre Stavik
År 2015
Type Konferanseartikkel/Bokkapittel
Publikasjon

The MARENOR Project – Maritime Radio System Performances in the High North

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1220041

This paper describes the main objectives and early achieved results from the MARENOR project. MARENOR is financed by the Research Council of Norway as well as Norwegian industry partners from oil and gas (EM survey company EMGS), fisheries (shipping company and shrimp trawler Remoy), positioning and...

År 2014
Type Konferanseartikkel/Bokkapittel
Publikasjon

Interference assessment of future satellite aeronautical communications

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1050482

ANTARES is a study within the Iris Programme of the European Space Agency, to design a satellite communication system that will provide ATM services over Europe and the surrounding oceanic areas beyond 2020-2025. As part of the development phase, the interference level that can be expected to be exp...

Forfattere Håkegård Jan Erik De Stefano Alessandro
År 2013
Type Konferanseartikkel/Bokkapittel
Publikasjon

Efficiency of Opportunistic Spectrum Sensing by Sequential Change Detection in Cognitive Radio

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1024401

A critical point in cognitive radio spectrum sensing is the ability to detect presence and absence of primary users as fast as possible at very low SNR. In this paper, sequential power detection by cumulative sum and recursive generalized likelihood ratio test is used to detect free spectral slots o...

År 2013
Type Presentasjon
Publikasjon

Efficiency of Opportunistic Spectrum Sensing by Sequential Change Detection in Cognitive Radio

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1088587

A critical point in cognitive radio spectrum sensing is the ability to detect presence and absence of primary users as fast as possible at very low SNR. In this paper, sequential power detection by cumulative sum and recursive generalized likelihood ratio test is used to detect free spectral slots o...

År 2013
Type Konferanseartikkel/Bokkapittel
Publikasjon

Power control in HetNets and cognitive networks

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+980194

In order to meet the demand for increased capacity in wireless networks, incorporating femtocells within the coverage of macrocells constitutes one of the strategies that currently receives most attention from both industry and academia. Femtocells may either be part of a HetNet as standardised with...

År 2012
Type Konferanseartikkel/Bokkapittel
Publikasjon

Dynamic Spectrum Access in realistic environments using reinforcement learning

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+980197

We study the use of reinforcement learning to model Dynamic Spectrum Access in a realistic multi-channel environment. Three different approaches from the literature on the multi-armed bandit problem are compared on a set of realistic channel access models — two are based on stochastic models of the ...

År 2012
Type Konferanseartikkel/Bokkapittel
Publikasjon

Empirical Path Loss Models for C-band Airport Surface Communications

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+924700

AeroMACS is a system currently under development for airport surface communications. It is based on the IEEE802.16-2009 standard, and is developed in cooperation with the WiMAX forum. The frequency band allocated to AeroMACS is 5091-5150 MHz. When specifying the AeroMACS system, knowledge of typical...

År 2012
Type Tidsskriftsartikkel
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