Abstract: A radio channel may comprise a first component between two devices, and second and third components via the controllable scatterer. First reference signal(s) may be transmitted with the controllable scatterer configured to alter a propagation of signals such that influence of the second and third components of the radio channel is mitigated. Second reference signal(s) may be transmitted with the controllable scatterer configured to alter a propagation of signals such that influence of the second and third components of the radio channel is increased. An estimate of the first component may be determined based on the first reference signal(s) and an estimate of the third component may be determined based on the second reference signal(s) and a pre-computed estimate of the second component.

Abstract: A device, in a training phase, obtains Channel State Information (CSI) for one or more links between another device and at least one Access Point (AP), and in the training phase, estimates location information of the other device based on at least one geometric localization technique; and generates a database comprising CSI of the one or more links, each CSI being associated with an estimated location information. Further, a device, in a testing phase, obtains a database from another device, wherein the database comprises CSI of one or more links, each CSI being associated with an estimated location information, and in the testing phase, the device estimates CSI for one or more links between the device and at least one AP, and determine location information based on the estimated CSI of the one or more links and the database.

Abstract: A sensing apparatus for detecting speed bumps or potholes on a road is disclosed. The sensing apparatus comprises a telemetric sensing system configured to collect a plurality of position vectors by telemetric sensing of a road surface, wherein each position vector extends from a common origin to a respective point on the road surface and wherein each position vector has a length and a direction. The sensing apparatus further comprises a processing circuitry configured to detect a road flatness exception by evaluating the lengths of the position vectors. Thus, an improved apparatus for detecting road irregularities such as speed bumps or potholes on a road is provided. The sensing apparatus remains functional in low light conditions, e.g., at night, and also in the presence of reverberation of the vehicle.

Abstract: A sensing apparatus comprises one or more radar and/or lidar sensors configured to collect a plurality of position including distance and/or direction measurement values for a plurality of objects associated with a traffic scenario in the vicinity of the apparatus. The sensing apparatus further comprises a processing circuitry configured to obtain auxiliary data associated with one or more of the plurality of objects in the vicinity of the apparatus and to assign or map a respective position measurement value of the plurality of position measurement values to a respective object of the plurality of objects in the vicinity of the apparatus on the basis of the auxiliary data.

Abstract: A device, in a training phase, obtains Channel State Information (CSI) for one or more links between another device and at least one Access Point (AP), and in the training phase, estimates location information of the other device based on at least one geometric localization technique; and generates a database comprising CSI of the one or more links, each CSI being associated with an estimated location information. Further, a device, in a testing phase, obtains a database from another device, wherein the database comprises CSI of one or more links, each CSI being associated with an estimated location information, and in the testing phase, the device estimates CSI for one or more links between the device and at least one AP, and determine location information based on the estimated CSI of the one or more links and the database.

Abstract: Embodiments relate to an apparatus for adjusting channel quality indicator measurements of a channel between a client device and a serving device within a wireless communication system. The apparatus includes a controller adapted to receive, from the client device, a first information and, when the client device is in a handover zone, a second information. The controller is further adapted to transmit according to a switching sequence either the first information alone or the first information together with the second information. The apparatus also includes an adjustment function entity adapted to receive the first information together with the second information and adapted to adjust the first information based on the second information by modifying it or keeping it unchanged. The first information is related to the CQI measurements, while the second information is related to a handover (HO).

Abstract: Embodiments relate to an apparatus for adjusting channel quality indicator measurements of a channel between a client device and a serving device within a wireless communication system. The apparatus includes a controller adapted to receive, from the client device, a first information and, when the client device is in a handover zone, a second information. The controller is further adapted to transmit according to a switching sequence either the first information alone or the first information together with the second information. The apparatus also includes an adjustment function entity adapted to receive the first information together with the second information and adapted to adjust the first information based on the second information by modifying it or keeping it unchanged. The first information is related to the CQI measurements, while the second information is related to a handover (HO).

Abstract: A multi-stream transmission method and device are provided for transmitting N data streams allocated to K different users. The method is implemented by a transmitter for a multi-user MIMO system having NT transmit antennas and ? k = 1 K ? ? N R k receive antennas associated with K receivers respectively associated with the K users. The method includes: performing a succession of two different iterative algorithms for calculating K precoding matrices of a linear precoder and K decoding matrices of a receiver, the receiver being of the normalized MF type with a Frobenius norm for the first algorithm, and the second iterative algorithm being initialized by a value output by the first iterative algorithm; and before each calculation of precoding matrices, calculating weights for weighting all of the streams.

Abstract: A method and apparatus for simultaneously transmitting K data streams allocated respectively to K different users. The method is implemented by a transmitter for a multi-user MIMO system having NT transmit antennas and N R = ? k = 1 K ? N R k receive antennas associated with K receivers, each associated with a respective user. The method includes, per data stream, at least: jointly calculating a linear pre-coder and a receiver adapted for a multi-user MIMO system using two different iterative algorithms in succession, wherein the second iterative algorithm is initialized with the output value from the first iterative algorithm.

Abstract: A multi-stream transmission method and device are provided for transmitting N data streams allocated to K different users. The method is implemented by a transmitter for a multi-user MIMO system having NT transmit antennas and ? k = 1 K ? ? N R k receive antennas associated with K receivers respectively associated with the K users. The method includes: performing a succession of two different iterative algorithms for calculating K precoding matrices of a linear precoder and K decoding matrices of a receiver, the receiver being of the normalized MF type with a Frobenius norm for the first algorithm, and the second iterative algorithm being initialized by a value output by the first iterative algorithm; and before each calculation of precoding matrices, calculating weights for weighting all of the streams.

Abstract: A method and apparatus for simultaneously transmitting K data streams allocated respectively to K different users. The method is implemented by a transmitter for a multi-user MIMO system having NT transmit antennas and N R = ? k = 1 K ? N R k receive antennas associated with K receivers, each associated with a respective user. The method includes, per data stream, at least: jointly calculating a linear pre-coder and a receiver adapted for a multi-user MIMO system using two different iterative algorithms in succession, wherein the second iterative algorithm is initialized with the output value from the first iterative algorithm.