Anite Telecoms Oy

Oulu, Finland

Anite Telecoms Oy

Oulu, Finland

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Fan W.,University of Aalborg | Sun F.,University of Aalborg | Kyosti P.,Anite Telecoms Oy | Nielsen J.,University of Aalborg | And 3 more authors.
Electronics Letters | Year: 2013

A technique to emulate 3D geometry-based channel models in a multiprobe over the air test setup is presented. The proposed technique provides a general emulation framework for any spherical incoming power spectrum. The emulation method results in two optimisation objectives, which are both convex. They give optimal emulation accuracy and allow relatively low computational complexity. © The Institution of Engineering and Technology 2013.


Fan W.,University of Aalborg | Kyosti P.,Anite Telecoms Oy | Hentila L.,Anite Telecoms Oy | Nielsen J.O.,University of Aalborg | Pedersen G.F.,University of Aalborg
IEEE Antennas and Wireless Propagation Letters | Year: 2014

This letter discusses over-the-air (OTA) testing for multiple-input-multiple-output (MIMO)-capable terminals, with emphasis on modeling Rician channel models in the multiprobe anechoic chamber setups. A technique to model Rician channels is proposed. The line-of-sight (LOS) component, within arbitrary polarization and an arbitrary impinging direction, and non-LOS (NLOS) component, with any impinging power angular spectrum (PAS), can be created. Simulation results show that the emulated Rician channels approximate the target models accurately in terms of field envelope distribution, K-factor, Doppler spectrum, and spatial correlation at the receiver (Rx) side. © 2014 IEEE.


Fan W.,University of Aalborg | Kyosti P.,Anite Telecoms Oy | Nielsen J.O.,University of Aalborg | Pedersen G.F.,University of Aalborg
IEEE Transactions on Vehicular Technology | Year: 2016

This paper discusses over-the-air (OTA) testing for multiple-input-multiple-output (MIMO) capable terminals with emphasis on wideband MIMO channel capacity analysis in a multiprobe anechoic chamber setup. In the literature, the spatial correlation simulation accuracy at the receiver (Rx) side has been used to determine the test area size for a limited number of probes. However, it is desirable that the test area size is defined in terms of data rate deviation of the simulated channel in the laboratory from that of the target channel model. This paper reports MIMO capacity analysis results for wideband spatiotemporal channel models, with emphasis on the impact of the spatial correlation at the transmit (Tx) side, the channel model, and the spatial correlation at the Rx side on the capacity simulation accuracy. Simulation results show that the number of probes is irrelevant to capacity simulation accuracy when the spatial correlation at the Tx side is in the high region (e.g., ρ > 0.7). Furthermore, when correlation at the Tx side is low, the spatial correlation accuracy is less critical with small correlation at the Rx side. The simulation results are further supported by measurements in a practical multiprobe anechoic chamber setup. The capacity simulation accuracy is shown to be a valid measure to determine the test area size. © 2015 IEEE.


Jamsa T.,Anite Telecoms Oy | Kyosti P.,Anite Telecoms Oy
2015 9th European Conference on Antennas and Propagation, EuCAP 2015 | Year: 2015

Increased interest towards direct Device-to-Device (D2D) radio communication has led to questions about the validity of standardised Geometry-based Stochastic Channel Models (GSCMs). D2D sets new requirements to channel models due to the different usage scenarios and different propagation environments. This paper discusses extensions to GSCMs for fulfilling the new requirements such as dual-mobility, spatial consistency, and lower antenna height compared to base stations. By using the sum of sinusoids method, significant savings on memory consumption can be achieved. © 2015 EurAAP.


Fan W.,University of Aalborg | Carton I.,University of Aalborg | Kyosti P.,Anite Telecoms Oy | Pedersen G.F.,University of Aalborg
IEEE Transactions on Antennas and Propagation | Year: 2016

This paper discusses virtual drive testing (VDT) for multiple-input multiple-output (MIMO)-capable terminals in multiprobe anechoic chamber (MPAC) setups. We propose to perform VDT, via reproducing ray-tracing (RT)-simulated channels with the field synthesis technique. Simulation results demonstrate that realistic RT channels can be accurately reproduced within the test zone with a limited number of probes in MPAC setups. The feasibility of performing VDT via reproducing RT-simulated channels is supported by measurement results in a practical three-dimensional (3-D) MPAC setup. The amplitude and phase of the electric field have been measured throughout the test zone with a calibration dipole, and excellent match between simulation and measurement was achieved. © 1963-2012 IEEE.


Fan W.,University of Aalborg | Jamsa T.,Anite Telecoms Oy | Nielsen J.O.,University of Aalborg | Pedersen G.F.,University of Aalborg
IEEE Antennas and Wireless Propagation Letters | Year: 2015

This letter discusses generating three-dimensional (3-D) spatial channel models with emphasis on the angular sampling methods. Three angular sampling methods - i.e., modified uniform power sampling, modified uniform angular sampling, and random pairing methods - are proposed and investigated in detail. The random pairing method, which uses only 20 sinusoids in the ray-based model for generating the channels, presents good results if the spatial channel cluster is with a small elevation angle spread. For spatial clusters with large elevation angle spreads, however, the random pairing method would fail, and the other two methods should be considered. © 2002-2011 IEEE.


Nurmela V.,Nokia Inc. | Kyosti P.,Anite Telecoms Oy
IEEE Vehicular Technology Conference | Year: 2014

In a future radio communication network various types of links will co-exist in the same area, and they need to be modelled consistently. We describe a channel modelling framework, which can consistently describe large and small scale phenomena of different types of links. The approach supports generation of spatially consistent radio channel realization also for cases where both link ends are moving like in device-to-device communication. Traditional cellular links and distributed antenna systems can be described with the same model, which allows a fair comparison between different types of transmission schemes. The main principle of the proposed framework is to create the propagation environment independently from the radios like in COST 2100 model. This is like simplified ray tracing without a map, i.e. without need of any detailed geometric or electromagnetic description of the environment as a prerequisite. The modelling principle and some examples of resulting radio channel statistics are simulated and presented. andcopy; 2014 IEEE.


Patent
Anite Telecoms Oy | Date: 2013-02-07

Apparatus comprises a receiver receiving wireless transmission of a real radio system from at least one base station of a radio system as a function of reception direction. The transmission comprises predetermined data. The apparatus comprises also a processing unit that forms taps of a delay profile on the basis of comparison between the data that is received and corresponding predetermined data. The processing unit estimates direction for the taps of the delay profile on the basis of a reception direction of the transmission, and forms radio channel data by associating the taps of the delay profile with the estimated direction. The radio channel data is for a radio channel model of a MIMO emulation in an OTA chamber having a plurality of antennas around a test zone where a device-under-test may be placed.


Kyosti P.,Anite Telecoms Oy | Kemppainen P.,Anite Telecoms Oy | Jamsa T.,Anite Telecoms Oy
8th European Conference on Antennas and Propagation, EuCAP 2014 | Year: 2014

This paper discusses a radio channel measurement scheme to bring site specific propagation characteristics of a live LTE network to a virtual drive testing in a MIMO Over-the-Air (OTA) emulation environment. A directional radio channel measurement performed in a live LTE network in nine different locations is reported and the modelling procedure for MIMO OTA is described. The channel measurement system is composed of a scanner for LTE network, a directive dual polarized antenna, and a channel analysis & modelling software. Measured radio channel parameters are power angular distribution, power delay profile, received polarization power ratio, Ricean K-factor, antenna correlation, and received signal level. The measurement results indicate, for instance, that the angular power distribution is not uniform, but has a range of variation of up to 22 dB, and that the received polarization power ratio is not 0 dB, but vary in between 13 and -8 dB. Line-of-sight component was present in many locations, the average Ricean K-factor was 3.6 dB. © 2014 European Association on Antennas and Propagation.


Grant
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ICT-2011.1.1 | Award Amount: 26.75M | Year: 2012

In 2020, mobile and wireless traffic volume is expected to increase thousand-fold over 2010 figures. Moreover, an increase in the number of wirelessly-connected devices to counts in the tens of billions will have a profound impact on society. Massive machine communication, forming the basis for the Internet of Things, will make our everyday life more efficient, comfortable and safer, through a wide range of applications including traffic safety and medical services. The variety of applications and traffic types originating from or reaching mobile, WLAN, and sensor networks, will be significantly larger than today, and will result in more diverse requirements on services, devices and networks.\n\nMETIS is set up by leading global players to prepare the migration from todays mobile systems, focused on human communications, towards tomorrows multi-purpose global communication infrastructure, serving humans and things.\n\nThe main objective of METIS is to lay the foundation for, and to generate a European consensus on this future global mobile and wireless communications system. METIS will provide valuable and timely contributions to pre-standardisation and regulation processes, and ensure European leadership in mobile and wireless communications.\n\nMETIS will provide fundamentally new solutions which fit the needs beyond 2020. Research will be conducted on network topologies, radio links, multi-node, and spectrum usage techniques. Horizontal topics will be used to integrate the research results into a system concept that provides the necessary flexibility, versatility and scalability at a low cost. The METIS concept will be evaluated, and a roadmap will be generated.\n\nMETIS is a strong European consortium, completed by selected non-European partners to ensure global harmonisation. The consortium gathers major telecommunication stakeholders; vendors, operators and academic researchers, together with a new partner from the automotive industry to provide new insights

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