In an OAM multiplexing communication system that subjects a plurality of signal sequences to multiplex transmission by using an OAM mode, a transmitting station includes a transmitting antenna using an M-UCA formed of a plurality of UCAs, and a unit performing basis transformation in each of the rotational direction dimension and a diameter direction dimension in a polar coordinate system having a center of UCAs as an origin, and subjecting the plurality of signal sequences to multiplex transmission for each complex mode formed by a combination of different bases in each dimension. A receiving station includes a receiving antenna using an M-UCA, and a unit receiving a signal subjected to multiplex transmission from the transmitting station, performing basis transformation in each of the rotational direction dimension and the diameter direction dimension by using the received signal, and demultiplexing the plurality of signal sequences subjected to the multiplex transmission.

The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.

A wireless device 108 and a method therein for assisting in precoder selection for wireless communication with a Radio Node (RN) 106, and a RN 106 for performing precoder selection for wireless communication with a wireless device 108. The wireless device is configured with a set of precoders. The wireless device determines a subset of precoders out of the set of precoders; and transmits, to the RN, at least one Sounding Reference Signal (SRS) precoded with a respective at least one precoder comprised in the subset. The RN receives, from the wireless device, at least one SRS precoded with a respective at least one precoder comprised in a subset of precoders; and transmits, to the wireless device, a signal indicative of a selected precoder to be used for a transmission to the RN, wherein the selected precoder is indirectly selected based on the received at least one SRS.

A method of communicating with UEs located within a serviced area, the method involving: defining a set of differently directed, narrow beams which collectively cover the serviced area; (a) during a first period of operation: (i) cycling through the beams one at a time by separately activating each beam in synchronization with the subframe structure of a signal from the BBU; and (ii) while each beam is activated, initiating channel sounding for all of the UEs in the serviced area; and (b) during a second period of operation immediately following the first period of operation: (i) cycling through all of the beams one at a time by separately activating each beam in synchronization with the subframe structure of the signal from the BBU; and (ii) while each beam is activated, transmitting data over that beam to the UEs in accordance with a scheduling scheme.

Aspects described herein relate to determining a condition related to at least one of a thermal condition at the first device or receiving, at the first device, rate or diversity parameters reported to the first device by a second device, modifying, based on determining the condition, a configuration of a set of antenna elements from at least one antenna panel to use in wireless communication, and communicating with one or more devices using the modified configuration of the set of antenna elements from the at least one antenna panel.

Beamforming communication systems with modular front-ends are provided herein. In certain embodiments, a beamforming communication system includes an antenna array partitioned into a plurality of sub-arrays, and a plurality of front-end modules each operatively associated with one of the sub-arrays. Each of the front-end modules includes at least two radio frequency (RF) transmit channels and at least two RF receive channels. Thus, the signals transmitted and received on the antenna array are processed using a multiple front-end modules servicing sub-arrays.

Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2).sup.T=F[i] (s1, s2).sup.T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE receives first information, receives a first signaling and transmits a first radio signal. The first information is used for determining a first air interface resource and a second air interface resource, and the first signaling includes scheduling information of the first radio signal; in instances in which the first radio signal is related to the first air interface resource, the scheduling information of the first radio signal is codebook-based; in instances in which the first radio signal is related to the second air interface resource, the scheduling information of the first radio signal is non-codebook-based. The above method has following benefits: when multiple TRPs serve one UE simultaneously, each TRP can select an optimal precoding mode depending on its own actual condition.

A method for reporting channel state information (CSI) by means of a terminal in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving a channel state information reference signal (CSI-RS) from a base station, wherein the CSI-RS is related to at least one panel of an antenna array of the base station; generating CSI on the basis of the CSI-RS and a codebook according to a specific shape of the at least one panel; and reporting the CSI to the base station.

An electronic device according to an embodiment includes an mmWave communication module and a processor. The processor is configured to receive a first signal transmitted by a first external electronic device, identify a distance of a transmission path of the first signal, transmit a second signal, receive a third signal obtained when the second signal is reflected, identify a distance of a transmission path of the second signal based on a difference between a transmission time of the second signal and a reception time of the third signal, and determine whether the transmission path of the first signal is a line of sight (LoS) path between the electronic device and the first external electronic device based on a difference between the distance of the transmission path of the first signal and the distance of the transmission path of the second signal. In addition, other embodiments are possible.