The present invention provides a MIMO transmission method for discrete modulated signals. The method is mainly characterized in maximizing the mutual information of symbol vectors of a transmitter and a receiver by joint optimization of a source distribution and a precoding matrix. When the current precoding matrix G is determined, the distribution of source multi-dimensional vectors x is maximized by a Lagrange multiplier method to maximize a source entropy; and when the distribution of the current source multi-dimensional vectors x is determined, the precoding matrix G is optimized by a gradient descent method to maximize the mutual information of the transmitted and received vectors. The transmission rate approximates the Shannon limit under a MIMO scenario by joint optimization of the source distribution and the precoding matrix. After the transmitter determines a marginal distribution of symbols of each channel, a non-uniform modulation is performed by using a probabilistic amplitude shaping technology.

Spatial redistributors and methods of redistributing signals in accordance with various embodiments of the invention are illustrated. One embodiment includes an array of channels configured to receive and retransmit a signal, where each of a plurality of independently operating channels in the array includes: at least one antenna element; an RF chain configured to apply at least a time delay to the received signal prior to retransmission; control circuitry configured to control the time delay applied to the received signal by the RF chain; and a reference oscillator. In addition, the array of channels is configured to redirect a signal received from a first set of directions for retransmission in a second set of directions; and the control circuitry of the channels in the array of channels coordinates the time delays applied to the received signal across the array of channels to control the wave front of the retransmitted signal.

For example, an apparatus may include a Printed Circuit Board (PCB); a Multiple-Input-Multiple-Output (MIMO) radar antenna on the PCB, the MIMO radar antenna comprising a plurality of Transmit (Tx) antenna elements configured to transmit Tx radar signals, and a plurality of receive (Rx) antenna elements configured to receive Rx radar signals based on the Tx radar signals; and a surface wave mitigator connected to the PCB, the surface wave mitigator configured to mitigate an impact of surface waves via the PCB on a radiation pattern of the MIMO radar antenna.

A RF module and an electronic device. The RF module includes a RF transceiver module; a first antenna configured to transmit a first transmission signal, and receive a first main reception signal and a second diversity reception signal; a first triplexer connected to the RF transceiver module and the first antenna, and being configured to isolate the first transmission signal, the first main reception signal, and the second diversity reception signal; a second antenna configured to transmit a second transmission signal, receive a second main reception signal and a first diversity reception signal, and a frequency band of the first transmission signal being different from that of the second transmission signal; and a second triplexer connected to the RF transceiver module and the second antenna, and being configured to isolate the second transmission signal, the second main reception signal, and the first diversity reception signal.

A communication apparatus capable of wireless communication with another communication apparatus via a first communication path and a second communication path sets a directivity of an antenna to a first directivity capable of wireless communication via the first communication path and receives data from the another communication apparatus via the first communication path. When the communication apparatus sends an acknowledgement signal to the another communication apparatus via the first communication path in response to reception of the data, the communication apparatus sets the directivity of the antenna to a second directivity capable of wireless communication via the first communication path and wireless communication via the second communication path for a set period thereafter.

Various embodiments of the present disclosure relate to a next-generation wireless communication system for supporting high data transfer rates beyond the 4th generation (4G) wireless communication system. According to the various embodiments, a method of transmitting and receiving signals in a wireless communication system and apparatus for supporting the same may be provided.

A method and a network entity are provided. A set of transmission configuration indicator state configurations are transmitted to a user equipment, via a protocol layer above the physical layer, wherein each transmission configuration indicator state includes an indication of an associated at least one downlink reference signal which is used as a quasi co-location source for a resource and a quasi co-location type associated with the at least one downlink reference signal. The at least one downlink reference signal associated with the set of transmission configuration indicator state configurations is transmitted. An indication of a first subset of transmission configuration indicator states is received from the user equipment, where the indication of the first subset includes identifying the particular transmission configuration indicator states that are part of the first subset, based on the at least one downlink reference signal associated with the set of transmission configuration indicator state configurations.

Beam detection method and device, beam adjusting method and device, antenna module selection method and device, and computer readable storage media are provided. The antenna module selection method is applied in a terminal device including first and second AiPs, and the method includes: the ULA array in the first AiP detecting signals emitted by the UPA array in the first AiP, and comparing detected characteristic parameter values of the signals emitted by the UPA array in the first AiP withe a first preset group of characteristics parameter values; the ULA array in the second AiP detecting signals emitted by the UPA array in the second AiP, and comparing detected characteristic parameter values of the signals emitted by the UPA array in the second AiP with a second preset group of characteristic parameter values: determining to use the first or second AiP for signal transmission and reception based on the comparison.

This disclosure provides systems, methods, and devices for wireless communication that support mechanisms for sidelink beamforming alignment over a set of resources based on a deterministic sequence in a wireless communication system. In aspects, an sidelink initiator user equipment (UE) may initiate a beamforming alignment procedure with a responder UE over a the sidelink. The initiator UE may define a set of subchannels specified by a deterministic sequence. The set of subchannels may be subchannels over which the initiator UE may perform reception beam sweeping. The deterministic sequence may be anchored to a direct frame number (DFN) of the sidelink frame without initial sensing, and may be determined via a sequence index, as a function of sidelink UE identification ID(s), or a combination thereof. In this manner, the number of bits for indicating the deterministic sequence to the responder UE may be reasonable, manageable, and/or moderate.

A method, apparatus, and computer program for controlling allocation of control message fields in uplink transmission in a cellular telecommunication system are presented. Uplink control message fields are allocated to the resources of a physical uplink shared traffic channel according to an uplink transmission scheme selected for a user terminal. The control message fields are allocated so that transmission performance of the control messages is optimized for the selected uplink transmission scheme.