An antenna port mapping method and a network device are disclosed. The method includes: determining, by a network device, a polarization direction of each of P physical antennas of the network device and an antenna array to which each of the P physical antennas belongs, where P is a multiple of 4; and respectively mapping, by the network device, a first antenna port and a second antenna port to a first group of physical antennas and a second group of physical antennas in the P physical antennas, and respectively mapping a third antenna port and a fourth antenna port to a third group of physical antennas and a fourth group of physical antennas in the P physical antennas.

The present invention relates to a wireless communication system and provides an efficient control information transmission method and apparatus for supporting a multiple antenna transmission technique. A method is provided for transmitting downlink hybrid automatic repeat request (HARQ) information related to an uplink multiple codeword transmission and includes receiving the uplink multiple codeword transmission, generating HARQ information related to each of the multiple codewords based on a result of decoding each of the multiple codewords, modulating the HARQ information, and transmitting the modulated HARQ information via one or more physical HARQ indicator channels (PHICHs).

This invention is a transmission device capable of enhancing the reception characteristics of a terminal when employing transmit diversity using two antenna ports in an ePDCCH. In a base station (100) that transmits a reference signal to a terminal (200) using two antenna ports, a setting unit (102), on the basis of the reception quality of the terminal, sets as the aforementioned two antenna ports either a first antenna port pair for which DMRS (reference signals) do not undergo mutual code multiplexing, or a second antenna port pair for which the DMRS do undergo code multiplexing. A transmitter (109) transmits the DMRS from the two antenna ports set in the setting unit (102).

A wireless communication method and apparatus in a wireless local area network (WLAN) system are disclosed. A wireless communication method according to one embodiment may include generating a high-efficiency Wi-Fi (HEW) frame including at least one of an HEW-SIG-A field and an HEW-SIG-B field which include channel information for communications according to an Orthogonal Frequency-Division Multiple Access (OFDMA) mode, and transmitting the generated HEW frame to a reception apparatus

Certain aspects of the present disclosure provide techniques for physical downlink control channel (PDCCH) with repetitions, including techniques for signaling the number of PDCCH repetitions, the hybrid automatic repeat request (HARQ) timeline processing with PDCCH repetitions, and the demodulation reference signal (DMRS) structure for the repeated PDCCH. A method for wireless communications, by a user equipment (UE), includes determining a number of repetitions of a PDCCH. Each of the PDCCH repetitions has a same downlink control information (DCI) payload, a same aggregation level, and/or a grant for a same data channel allocation. The method includes monitoring for the PDCCH based on the determined number of repetitions.

The application relates to a user equipment for wireless communications with a multiple-input multiple-output (MIMO) base station over a wireless communications channel. The user equipment comprises a communications interface configured to receive a current pilot signal over the wireless communications channel from the base station, and at least one processor configured to determine a current channel state information (CSI) based on the current pilot signal and to determine a CSI reliability measure value based on the current CSI and one or several previous CSI, where the at least one processor is configured to determine the previous CSI based on previous pilot signals, i.e. previously received pilot signals.

A method according to an embodiment of the present invention, in which a terminal receives downlink control information from a base station in a wireless communication system comprises: a step of receiving information on an antenna port from the base station; a step of performing blind detection of a control channel on the basis of the information on the antenna port; and a step of obtaining downlink control information carried by the control channel through the blind detection, wherein it can be assumed that the information on the antenna port indicates the at least one antenna port to be monitored by the terminal among the plurality of antenna ports used by the base station for the control channel transmission, and the terminal while performing the blind detection applies a specific transmission diversity scheme to at least one antenna port indicated through the information on the antenna port. The terminal is capable of communicating with at least one of another terminal, a terminal related to an autonomous driving vehicle, the base station or a network.

A terminal device receives a DMRS and data from a network device. The DMRS and the data undergo Alamouti coding in space domain and frequency domain, or the DMRS and the data undergo Alamouti coding in space domain and time domain, and a DMRS obtained through the Alamouti coding is mapped to a first DMRS port and a second DMRS port. A modulation symbol of the first DMRS port is related to a modulation symbol of the second DMRS port. The terminal device demodulates the data based on the DMRS. Therefore, the DMRS corresponds to a transmission scheme of the data, to help the terminal device demodulate the data. This can reduce interference estimation complexity of the terminal device.

Search space-BFR time occasions may overlap with other search space occasions. Additionally, if any CORESET other than a CORESET-BFR has lowest CORESET ID, the UE will prioritize receiving that CORESET and may miss the BFR response. Accordingly, assigning a priority to CORESETs or search spaces during BFR may be preferable. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may allocate a set of time-frequency resources to a plurality of CORESETs or a plurality of search spaces. The apparatus may assign a priority to each of the plurality of CORESETs or the plurality of search spaces. The apparatus may assign a highest priority to a CORESET for BFR or a search space for BFR.

Provided is a receiver device that can switch between transmission methods, while minimizing increase in the number of blind decryption iterations and the amount of signaling needed for acknowledgement. In this device, a receiver part (201) receives a signal mapped to any of a plurality of mapping candidates; and according to application levels established for each of the plurality of mapping candidates, a control signal processor (205) performs blind decryption of the plurality of mapping candidates, employing either a first transmission method using a single antenna port to carry out precoding based on feedback information from the receiver device, or a second transmission method involving transmission diversity employing multiple antenna ports.