The present disclosure relates to wireless communication methods, network devices, and terminal devices. One example method includes receiving, by a terminal device, configuration information sent by a network device, where the configuration information is used to indicate a beam sweeping type, and determining, by the terminal device, the beam sweeping type based on the configuration information.

This application provides sounding reference signal transmission methods and apparatuses. One method comprises: determining, by a terminal device, that a sounding reference signal (SRS) to be transmitted is an n.sub.SRS.sup.th transmission of a plurality of SRS transmissions, wherein n.sub.SRS is a non-negative integer; selecting, by a terminal device, an antenna group of Λ antenna groups to transmit the sounding reference signal (SRS) based on Λ and n.sub.SRS, such that when sending the SRS for 2Λ times, the SRS is sent through each of the Λ antenna groups at least once, wherein Λ is a positive integer greater than or equal to 3; and sending, by the terminal device during the n.sub.SRS.sup.th transmission, the SRS through antenna ports comprised in the selected antenna group.

The invention discloses a method of conveying information from a sender to a receiver by use of various codeword patterns given in a mapping table and detection through decoding via the reverse mapping process. The codeword patterns may be selected as combinations of bits, frequencies, ports, or other elements as desired. Associated systems for carrying out the described encoding methods are also provided. The various methods may be applicable in low transmit power, energy-saving, secure, low latency, storage and in military, mobile, optical, deep space and fixed telecommunication systems for long range transmission and reliable information.

Front-end architecture having switchable duplexer. In some embodiments, a front-end architecture can include a first receive signal path having a first receive filter coupled to a first antenna, a second receive signal path having a second receive filter coupled to a second antenna, and a transmit signal path having a transmit filter. The front-end architecture can further include a signal routing assembly configured to couple the transmit filter to the first antenna in a first mode, and to couple the transmit filter to the second antenna in a second mode.

In an SM-MIMO wireless communication system, multiple transmitting antennae may be utilized to transmit wireless signals that carry signal sequences. A selection of the multiple transmitting antennae may be configured to represent a portion of the signal sequences so that channel state information (CSI) is not required at the receiving end of the SM-MIMO system.

A communication method and an apparatus using beamforming in a wireless communication system are provided. The communication method includes determining a candidate user set including one or more Mobile Stations (MSs), for Multiple User-Multiple Input Multiple Output (MU-MIMO) transmission, transmitting beam information indicating best Base Station (BS) transmission beams of the MSs of the candidate user set to the MSs of the candidate user set, receiving Precoding Matrix Index (PMI) information indicating a PMI to be used for baseband precoding from each of the MSs of the candidate user set, the PMI information being determined based on the beam information, and transmitting a signal precoded based on the PMI information to at least one MS.

A base station may configure a user equipment (UE) to perform sounding reference signal (SRS) transmissions using an SRS resource set. The SRS resource set may be configured for two or more functions, e.g., functions such as codebook-based SRS transmission, non-codebook-based SRS transmission, antenna port switching, beam management, etc. By enabling the use of such dual function (or multi-function) SRS resource sets, the average data rate associated with configuration transmissions to the UE may be reduced.

Disclosed is a relay method including: receiving, as input, respective reception signals by two receive antennas, the reception signals each including a reception signal resulting from multiplexing respective transmission signals transmitted by two transmission antennas in a first frequency band; performing frequency conversion on the reception signal received by one of the receive antennas so as to obtain a signal of a third frequency band; and performing frequency multiplexing on the signal having the third frequency band and the reception signal received by the other of the receive antennas.

A wireless device is configured with a plurality of channel-sensing resources, each channel-sensing resource being associated with at least one corresponding transmission resource. The wireless device evaluates (810), in response to a determination that first data is ready to be transmitted by the wireless device, whether one or more of the plurality of channel-sensing resources are occupied, and transmits (820) at least a part of the first data on at least one transmission resource associated with at least one channel-sensing resource, in response to detecting that the at least one of the plurality of channel-sensing resources is not occupied. The wireless device further receives (830) a grant for a scheduled transmission at least partly overlapping with at least one of said plurality of channel-sensing resources; and transmits (840) second data in accordance with the received grant.

A terminal according to one aspect of the present disclosure includes a receiving section that receives a Medium Access Control (MAC) control element for activating spatial relation information (SRI) related to a Sounding Reference Signal (SRS) resource set, and a control section that applies the SRI indicated by the MAC control element to a plurality of SRS resources in the SRS resource set, when the SRS resource set corresponds to a specific usage. According to one aspect of the present disclosure, a spatial relation for an SRS can be appropriately specified.