First signals and second signals are communicated using polarization multiplexing. Different spatial filters are applied at a reconfigurable relaying device for the first and second signals.

Wave-controlled reconfigurable intelligent surfaces in accordance with embodiments of the invention are disclosed. In one embodiment, a wave-controlled reconfigurable intelligent surface for wireless communication may include a first layer comprising a plurality of unit cells devoted to providing local reflection properties via one or more tuning components in each unit cell of the plurality of unit cells, a system of one or more biasing transmission lines configured to provide control, and where at least one transmission line is configured for biasing the one or more tuning components using at least one full-domain basis function.

This document generally relates to a system including wireless access nodes and user devices that communicate with each other via one or more intelligent reflecting devices. An intelligent reflecting device may have a surface covered by a least one metasurface layer configured to filter at least one of incoming signals or outgoing signals. In addition or alternatively, an intelligent reflecting device or a wireless access node may determine which user devices to include in a user group to serve based on telecom operator and/or user identification information communicated to the intelligent reflecting device.

This document generally relates to a system including wireless access nodes and user devices that communicate with each other via one or more intelligent reflecting devices. An intelligent reflecting device may have a surface covered by a least one metasurface layer configured to filter at least one of incoming signals or outgoing signals. In addition or alternatively, an intelligent reflecting device or a wireless access node may determine which user devices to include in a user group to serve based on telecom operator and/or user identification information communicated to the intelligent reflecting device.

The base station according to an embodiment communicates with one or more user terminals through one or more reconfigurable intelligent surfaces(RIS.sub.s). The base station includes a communicator that performs communication with at least one of the one or more user terminals and the one or more reconfigurable intelligent surfaces, and a controller connected to the communicator, and the controller may determine a matching state of the one or more user terminals and the one or more reconfigurable intelligent surfaces that maximizes a sum of data rates for the one or more user terminals connected through the communicator, on/off states of one or more reflective elements included in the one or more reconfigurable intelligent surfaces, total power consumption, and a phase value of the one or more reflective elements included in the one or more reconfigurable intelligent surfaces.

A node including a non-planar reflective surface is disclosed. The node may receive, from a base station, an indication of a surface configuration of at least one convex reflective surface of the node. The indication may indicate that the surface configuration corresponds to at least one of a broadcast configuration or a UE-specific configuration. The node may configure, upon receiving the indication of the surface configuration, the at least one convex reflective surface based on the surface configuration. The surface configuration may correspond to at least one of the broadcast configuration or the UE-specific configuration. The node may forward communication received from, or forward communication to, the base station based on the surface configuration of the at least one convex reflective surface.

Methods, systems, and devices for wireless communications are described in which a transmitting device may transmit a set of reference signals to a receiver via a configurable surface such as a reconfigurable intelligent surface (RIS). The RIS may randomly adjust one or more parameters for one or multiple RIS elements to provide different beamformed parameters for reflected instances of each reference signal from the RIS. Each reference signal may have a corresponding reference signal index value, and the receiver may provide an indication of a selected the reference signal index value based on channel measurements of the reference signals. The transmitting device may provide an indication to the RIS of the index value, and may communicate with the receiver based on the selected reference signal via the RIS, where the RIS uses the parameters associated with the RIS index value for the communications.

Embodiments described herein provide for an RIS-aided determination of the location of mobile device that enables the signal reflected by the RIS to be identified through channel estimation. More specifically, an Orthogonal Cover Code (OCC)-based approach may be taken where the RIS is configured to use different weights to reflect different reference signals, enabling a receiving device to identify the reflected signal. This can be utilized on signals used for positioning of the mobile device. Additionally or alternatively, this can be used for positioning of the RIS.

According to an aspect, there is provided an apparatus for performing the following. The apparatus maintains, in at least one memory, information on a reference incidence direction and reference configuration information defining a plurality of configurations of a plurality of tunable load impedance circuits of a tunable reflective array of a reconfigurable intelligent surface or a subpanel thereof for the reference incidence direction. The apparatus measures an incidence direction from which electromagnetic waves are received by the reconfigurable intelligent surface. The apparatus calculates, based on the reference incidence direction, the measured incidence direction and the reference configuration information, corrected configuration information defining a plurality of corrected configurations for the measured incidence direction. Finally, the apparatus configures the plurality of tunable load impedance circuits according to a corrected configuration.

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may be associated with a reconfigurable surface for reflecting transmissions between second and third UEs (e.g., over sidelink resources). In one example, the first UE may transmit signaling indicating that retransmissions of a first message transmitted between a second and third UE and detected by the first UE may be reflected by the reconfigurable surface associated with the first UE. In another example, the first UE may receive a request from a second UE for signal enhancement using a reconfigurable surface, the request associated with a future transmission by the second UE to a third UE. In either case, the UE may determine to perform signal enhancement using a reconfigurable surface and may then reconfigure the reconfigurable surface for reflecting transmissions or retransmissions from the second UE to the third UE.