Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Koninklijke Philips Corporation N.V.

Markus Landmann

Marcus Grossmann

Sutharshun Varatharaajan

Venkatesh Ramireddy

Marcus Großmann

Ramireddy Venkatesh

Thomas Haustein

Lars Thiele

Leszek Raschkowski

Norbert Franke

Ramez Askar

Martin Kurras

Mohammad Alawieh

Niels Hadaschik

Paul Leather

Wilhelm Keusgen

Florian Römer

Marcus Grossman

Thomas Wirth

Paul Simon Holt Leather

Marcus Grobmann

Christopher Schirmer

Marcus Groβmann

A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a time-variant, frequency-selective MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration including a number of antenna ports, and downlink signals including the reference signal configuration; and a processor. The processor estimates an explicit CSI in the frequency domain using measurements on the downlink reference signals on the radio channel, selects a Doppler-delay precoder matrix (W) for a composite Doppler-delay-beam three-stage precoder, calculates either one or more of a channel quality indicator, CQI, and/or a precoder matrix indicator, PMI, and/or a rank indicator, RI, and reports to the transmitter the CSI feedback including either one or more of the CQI, and/or the PMI and/or the RI.

Doppler-delay codebook-based precoding and CSI reporting for wireless communications systems

The embodiment of the present disclosure relates to methods and apparatuses for enhancing the reporting of the channel state information (CSI) with respect to multiple downlink resources. A method performed by a UE comprises: receiving, from a network node, a CSI report configuration which provides a number N of reference signal resources for channel measurement; performing measurements on said N RS resources; calculating or determining one or more CSI quantities for a number M of selected RS resources; and transmitting, to the network node, a CSI report including the calculated or determined CSI quantities, wherein the CSI report comprises two parts—part 1 and part 2—, and wherein the content contained in part 1 indicates the size of part 2. There is also disclosed a UE, a method performed in a network node and a network node.

Methods and apparatuses for enhanced CSI reporting with respect to multiple downlink

A method performed by a UE for providing CSI feedback in the form of CSI reports in a wireless communication system includes receiving, from a gNB, higher layer configurations of one or more downlink reference signals, and CSI report configurations associated with the downlink reference signal configurations, and a radio signal including the downlink reference signals according to the one or more downlink reference signal configurations, the downlink reference signals provided over a configured number of frequency domain resources, time domain resources and one or more ports; determining, for each CSI report, a precoding matrix based on the downlink reference signals and two codebooks, and one or more non-zero combining coefficients for complex combining of one or more spatial domain and delay domain basis vectors; and reporting to the network node the CSI reports for the CSI report configurations.

Three-component codebook based CSI reporting

A communication device providing CSI feedback in a wireless communication system includes a transceiver to receive downlink reference signals and downlink signals including a reference signal configuration. A processor estimates an explicit CSI in the frequency domain. The processor selects a Doppler-delay-beam precoder matrix for a composite Doppler-delay-beam three-stage precoder, which is based on one or more codebooks including

Doppler codebook-based precoding and CSI reporting for wireless communications systems

A communication device for providing an explicit channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a radio time-variant frequency MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration, and downlink signals including the reference signal configuration, and a processor. The processor estimates the CSI using measurements on the downlink reference signals of the radio channel according to the reference signal configuration over one or more time instants/slots, constructs a frequency-domain channel tensor using the CSI estimate, performs a higher-order principal component analysis, HO-PCA, on the channel tensor, identifies a plurality of dominant principal components of the channel tensor, thereby obtaining a compressed channel tensor, and reports to the transmitter the explicit CSI including the dominant principal components of the channel tensor.

Explicit channel information feedback based on high-order PCA decomposition or PCA composition

The embodiments herein relate to method performed by a radio network node or a LMF, a method performed by a UE and a UE for downlink and uplink beam management for positioning measurements. The method comprising at least: configuring the target UE; receiving at least one report from the UE; exchanging the report(s) with neighboring network nodes and/or a location measurement function; providing instructions the UE; receiving at least one measurement report from the UE; and estimating the location of the UE using received information.

Beam management methods and apparatuses for positioning measurements in a communications network

Methods and apparatuses for enhancing the reliability and performance of the PDCCH in a wireless network. The method performed by a UE comprises: receiving a configuration of search space sets for the PDCCH, each search space set comprises a number of PDCCH candidates made up of a number of resource elements; monitoring for DCIs of a specific format as indicated in the configured PDCCH candidates; wherein a configuration an indication of an association of the search space sets with a search space set pool is provided to the UE, and at least two PDCCH candidates from the search space sets are associated with the same DCI content, or an association of two or more TCI states with a single CORESET is obtained from the network node; and applying the configuration(s) or indication of the association for receiving one or more PDCCH(s) on the search space sets.

Methods and apparatuses for enhancing the reliability and performance of the physical downlink control channel in a wireless communications network

The present disclosure relates to methods and apparatuses (UE, network node or gNB) for CSI reporting. The method performed by a UE comprises: receiving from the gNB, a radio signal via a MIMO channel, wherein the radio signal contains at least one DL-RS according to a DL-RS configuration; estimating said MIMO channel based on said received at least one DL reference signal for configured subbands; calculating a precoder matrix or a CSI matrix for a number of antenna ports of the gNB and configured subbands; the precoder matrix based on a first codebook and on a second codebook and a set of combining coefficients for complex scaling/combining one or more of vectors selected from the first codebook and the second codebook; and reporting, to the gNB, a CSI feedback report and/or a PMI/RI, used to indicate the precoder matrix or the CSI matrix for the configured antenna ports and subbands.

Methods and apparatuses for enhancement on basis subset indication for two-codebook based CSI reporting

Three component codebook based CSI reporting

An apparatus configured for wirelessly communicating in a wireless communications network includes a wireless interface configured for wireless communication and a controller configured for controlling a beam pattern of the wireless interface and at least one communication parameter of the wireless interface. The apparatus is configured for receiving a locking signal indicating a request for locking at least a part of the beam pattern and the at least one communication parameter. The controller is configured for locking at least the part of the beam and the at least one communication parameter responsive to the locking signal.

Apparatus, measurement system and measurement setup and methods for testing an apparatus

An apparatus includes an antenna array having a plurality of antennas. The antenna array is configured to receive a multi-carrier signal from a multi-antenna transmitter over a radio channel. The multi-carrier signal has at least two subcarriers, and each subcarrier is mapped at the transmitter to a respective subcarrier-beamformer. The respective subcarrier-beamformers has non-identical null and beam cone directions. A processor is configured to identify a communication direction for a radio signal communication between the apparatus and the transmitter. The communication direction is identified based on one or more specular path components of the radio channel which are related to a null or to a maximum of a subcarrier-beamformer.

Specular component estimation in a wireless communication network

The embodiments herein relate to a method performed by a UE () for providing a channel state information (CSI) feedback in a wireless communication system including at least the UE and a gNB () or a radio network node. The UE () is operative, by means of e.g. the processor () to: estimate the MIMO channel between the gl'JB () and the UE () based on received DL reference signals for the configured resource blocks. The UE () is further operative to calculate, based on a performance metric. a precoder matrix, for a number of antenna ports of the gNB () and configured subbands, the precoder matrix being based on two codebooks and a set of combination coefficients for complex scaling/combining one or more of vectors selected from a first codebook and a second codebook, and the UE () is operative to report a CSI feedback and/or a PMI and/or a PMI/RI, to the gNB (), used to indicate the precoder matrix for the configured antemia ports and resource blocks.

Methods and apparatuses for feedback reporting in a wireless communications network

The embodiments relate to methods and apparatuses for enabling transmission of at least one PUSCH. A method comprises: configuring a UE to receive a single PDCCH or a higher layer grant that schedules at least one PUSCH transmission occasion. If one PUSCH transmission occasion is scheduled: scheduling the UE to transmit at least two segments of the PUSCH, each segment is associated with a transmission setting comprising a set of transmission parameters, at least one transmission parameter associated with one of the segments is different from the corresponding transmission parameter associated with at least one other segment. If more than one PUSCH transmission occasion is scheduled, each PUSCH transmission occasion is associated with a transmission setting, wherein at least one transmission parameter associated with one of the PUSCH transmission occasions is different from the corresponding transmission parameter associated with one other PUSCH transmission occasion.

Methods and apparatuses for physical uplink shared channel for multi transmit-receive-point communications in a wireless communications network

A user equipment, UE, for communicating with a base station, BS, in a wireless communication system is described. The UE comprises one or more antenna arrays, each antenna array having a plurality of antenna elements. The UE signals to a BS, dependent on a property of the one or more antenna arrays, whether the UE supports full beam correspondence, partial beam correspondence or no beam correspondence.

Beam correspondence indication and bitmap for beam reporting for wireless communications

A method for evaluating an apparatus having at least one antenna array, the apparatus configured for forming a plurality of communication beam patterns using the antenna array, includes positioning of the apparatus in a measurement environment or moving/switching the probe/link antenna(s) of the measurement environment around the apparatus adapted to measure beam patterns and controlling the apparatus so as to form a predefined beam pattern of the plurality of communication beam patterns. The method includes measuring the predefined beam pattern using the measurement environment and/or the apparatus.

Growing community of inventors

Erlangen, Germany

Markus Landmann