Telefonaktiebolaget Lm Ericsson (publ)

Martin Johansson

Sven Oscar Petersson

Fredrik Athley

Henrik Asplund

Andreas Nilsson

Mikael Coldrey

Lars Manholm

Claes Tidestav

Bo Hagerman

Karl Werner

Niklas Jaldén

Robert Baldemair

Stefan Parkvall

Bengt Lindoff

Gunnar Mildh

Icaro L J Da Silva

Johan Rune

Fredrik Gunnarsson

Jinhua Liu

Yi-Pin Eric Wang

Erik Bengt Dahlman

Andres Reial

Jari Tapio Vikberg

Erik A Eriksson

Pål Frenger

Henrik Sahlin

Stefan Wager

Dennis Hui

Martin Hessler

Magnus Stattin

Joakim Axmon

Karl Norrman

Qianxi Lu

Qingyu Miao

Johan Torsner

Pradeepa Ramachandra

Gabor Fodor

Janne Peisa

Kumar Balachandran

Joachim Sachs

Ali S Khayrallah

Gen Li

Thorsten Lohmar

Zhang Zhang

Osman Nuri Can Yilmaz

Niclas Wiberg

Lars Lindbom

Johan Furuskog

Jonas Fröberg Olsson

Niklas Johansson

Torgny Palenius

Jianfeng Wang

Hai Feng Wang

Lars Sundström

Zhan Zhang

Peter Alriksson

Andreas Bergström

Jose Luis Pradas

Pontus Wallentin

Patrik Rugeland

Patrik Torgny Karlsson

Johan Axnäs

Mårten Ericson

Jonas Kronander

Shehzad Ali Ashraf

Fredrik Lindqvist

Reza Moosavi

Ning He

Dennis Sundman

Mikael Prytz

Håkan Axelsson

Yngve Selén

Andreas Cedergren

Nadia Brahmi

Ali El Essaili

Elena Myhre

Jonas Medbo

Jörg Huschke

Hugo Tullberg

Emma Wittenmark

Ulf Gustavsson

Virgile Garcia

Ke Wang Helmersson

Peter Von Wrycza

Bengt-Erik Olsson

Thomas Walldeen

Eleftherios Karipidis

Simon Järmyr

Rui Fan

Walter Müller

Anders Furuskär

Håkan Björkegren

Stefan Johansson

Edgar Ramos

Bo Göransson

Arne Simonsson

Johan Nilsson

Bo Lincoln

David Astely

Anders Wallén

Method and one or more first devices for supporting calibration of a multi-antenna array comprised in a first antenna device operative with a wireless communication network. The first device(s) provide phase correcting information, to be used in calibration of the multi-antenna array, based on covariances corresponding to recurrent displacement vectors of the multi-antenna array. Said covariances being based on channel estimates estimated from certain radio signals received after transmission over radio propagation channels between said multi-antenna array of the first antenna device and one or more second antenna devices operative with the wireless communication network.

Method and device(s) for supporting calibration of a multi-antenna array comprised in an antenna device operative with a wireless communication network

Methods and apparatus in a fifth-generation wireless communications network, including an example method, in a wireless device, that includes determining a reporting quality threshold for a parameter related to channel state information (CSI); performing a measurement for each of a plurality of beams from a first predetermined set of beams for evaluation; evaluating the measurement for each of the plurality of beams against the reporting quality threshold; discontinuing the performing and evaluating of measurements in response to determining that the reporting quality threshold is met for one of the beams, such that one or more beams in the first predetermined set of beams are not measured and evaluated; and reporting, to the wireless communications network, CSI for the one of the beams.

Network architecture, methods, and devices for a wireless communications network

Methods and apparatus in a fifth-generation wireless communications, including an example method, in a wireless device, that includes receiving a downlink signal comprising an uplink access configuration index, using the uplink access configuration index to identify an uplink access configuration from among a predetermined plurality of uplink access configurations, and transmitting to the wireless communications network according to the identified uplink access configuration. The example method further includes, in the same wireless device, receiving, in a first subframe, a first Orthogonal Frequency-Division Multiplexing (OFDM) transmission formatted according to a first numerology and receiving, in a second subframe, a second OFDM transmission formatted according to a second numerology, the second numerology differing from the first numerology. Variants of this method, corresponding apparatuses, and corresponding network-side methods and apparatuses are also disclosed.

The present disclosure relates to a metasurface arrangement including a first metasurface and a second metasurface which run mutually parallel and face each other. Each metasurface includes a corresponding periodic or quasi-periodic structure formed in a respective pattern. The first metasurface is formed in a dielectric material structure and the second metasurface is formed in either a dielectric material structure or in an electrically conducting structure. The periodic or quasi-periodic structure on the first metasurface is configured to yield a first response to an incident electromagnetic wave between the two metasurfaces, and the periodic or quasi-periodic structure on the second metasurface is configured to yield a second response to the incident electromagnetic wave between the two metasurfaces that is equivalent to the first response, thereby rendering the two metasurfaces mutually electromagnetically symmetric.

Metasurface arrangement

A wireless communication system node has at least two antenna ports, a beamforming controller, and a beamforming network. The beamforming network has at least two beam ports that are adapted to provide corresponding beams. The beamforming controller is arranged to control the beamforming network such that the beams have a common envelope in a desired plane, where the common envelope is adapted to provide coverage for a certain communication system sector.

Wireless communication system node with fixed beams having common envelope

There is provided mechanisms for beam selection. A method is performed by a network node. The method comprises performing a beam management procedure for at least two terminal devices. During the beam management procedure reference signals are transmitted in a beam sweep as performed in a set of beams. During the beam management procedure, each of the at least two terminal devices reports at least two beams in the set of beams for which the reference signals have been received with highest power. The method comprises selecting which beams to serve the at least two terminal devices based jointly on the reports and a mutual interference criterion for the at least two terminal devices.

Beam selection for terminal devices in MU-MIMO operation

The present disclosure relates to a wireless communication system node (), where the node () comprises at least two antenna ports (PA, PB, PC, PD; PA, PB, PC, PD). The node () further comprises a beamforming controller () and a 5 beamforming network () which in turn comprises at least two beam ports () that are adapted to provide corresponding beams (). The beamforming controller () is arranged to control the beamforming network () such that the beams () have a common envelope () in a desired plane, where the common envelope () is adapted to a 10 desired coverage for a certain communication system sector ().

A method for selecting a geometry of an antenna array in a multiple-input multiple-output, MIMO, radio communication system (), the method comprising; obtaining a first parameter set comprising a first communication distance Dand a first carrier frequency f, and a second parameter set comprising a second communication distance Dand a second carrier frequency f, determining a first radio communication performance measure based on the first parameter set in dependence of antenna array geometry, and a second radio communication performance measure based on the second parameter set in dependence of antenna array geometry, and selecting the antenna array geometry based on the first radio communication performance measure and on the second radio communication performance measure.

Antenna geometries for improved MIMO communication

The present disclosure relates to a device () adapted for aligning a first directive antenna () in an alignment direction Dtowards a second antenna (). The device is adapted to acquire measurement data regarding: &#x22c5;&#x2014;a first signal power () received from the second antenna () using a first effective antenna aperture () when the first directive antenna () is moved along an angular span () passing a desired alignment angle () along a certain direction (); and &#x22c5;&#x2014;a second signal power () received from the second antenna () using a second effective antenna aperture () when the first directive antenna () is moved along an angular span () passing a desired alignment angle () along a certain direction, the second effective antenna aperture () being smaller than the first effective antenna aperture (). The device () is furthermore adapted to determine the alignment direction Das an angle () in the angular span (), at which angle () a local maximum value () for both the first signal power () and the second signal power () coincide.

Alignment means for directive antennas

The disclosure relates to an antenna systemfor providing coverage for multiple-input multiple-output, MIMO, communication in mixed type of spaces. The antenna systemcomprises a leaky cablearranged to provide coverage in a first type of space, and a distributed antenna systemcomprising one or more antennasand ranged to provide coverage in a second type of space, wherein each of the one or more antennasof the distributed antenna systemis connected to the leaky cablethrough a circulator, and wherein the MIMO communication is enabled by both ends of the leaky cablebeing adapted for connection to a respective antenna portof a network nodeconfigured for 10 MIMO communication. The disclosure also relates to a related method and system.

Antenna system providing coverage for multiple-input multiple-output, MIMO, communication, a method and system

An antenna array comprising at least two sets of antenna unit elements is disclosed. Each set of antenna unit elements supports a respective frequency band, wherein a vertical center-to-center distance between the antenna unit elements of a lowest frequency among the respective frequency bands is more than twice the vertical extension, D, of convex hull containing one antenna unit element of the lowest frequency, and antenna unit elements of at least a second set are arranged interleaved with the antenna unit elements of the lowest frequency. An arrangement comprising the antenna array and a network node is also disclosed.

Antenna array and arrangement comprising an antenna array and a network node

The present invention relates to an active antenna system, AAS, for controlling coverage in a telecommunication network, and the AAS comprising a plurality of subarrays each having multiple radiating elements. The AAS is configured to provide coverage in a coverage angular range and the plurality of subarrays comprising at least two types of subarrays. The at least two types of subarrays comprises: a first type of subarray with a first radiation pattern having at least a first angular region with gain below a first threshold value, and a second type of subarray with a second radiation pattern having at least a second angular region with gain below a second threshold value, wherein the second radiation pattern deviates from the first radiation pattern and the first angular region in the first radiation pattern differs from the second angular region in the second radiation pattern.

Active antenna system

Growing community of inventors

Mölndal, Sweden

Martin Johansson