Abstract:
The present application discloses a method for a terminal reporting channel state information to a base station in a wireless communication system. Specifically, the method comprises the steps of: receiving, from a base station, a first reference signal corresponding to a row of a transmission antenna array, and a second reference signal corresponding to a column of the transmission antenna array; receiving, from the base station, a cross polarization characteristics measurement indicator; and reporting, to the base station, channel state information comprising a first precoder corresponding to the first reference signal and a second precoder corresponding to the second reference signal, wherein the channel state information comprises cross polarization characteristics information between antenna ports that have the same indexes, the antenna ports being among antenna ports having the first reference signal and the second reference signal transmitted.
Abstract:
The present invention provides a hybrid beamforming-based broadcast channel transmitting method and devices. In an embodiment of the present invention, a method for transmitting broadcast channels in a wireless connection system supporting hybrid beamforming includes: a step of transmitting N broadcast channels including the same broadcast information in N mutually different subframes; and a step of receiving feedback information on one or more of the N broadcast channels, wherein N mutually different analog beams may be applied to the N broadcast channels, and N may be a positive integer.
Abstract:
Disclosed herein is a method for generating channel state information at a user equipment (UE) for multiple input multiple output (MIMO) based beamforming in a wireless communication system. The method includes receiving a first pilot pattern and a second pilot pattern from a base station, selecting a precoding matrix index (PMI) and a rank indicator (RI) for each of the first pilot pattern and the second pilot pattern, configuring the RI for the first pilot pattern as an RI for a three-dimensional (3D) channel, wherein the RI for the first pilot pattern is larger than the RI for the second pilot pattern; and reselecting a PMI of the second pilot pattern on the assumption that the RI of the second pilot pattern is equal to the RI for the 3D channel and the PMI of the first pilot pattern is equal to a preselected PMI.
Abstract:
A method of processing a reception signal and a MIMO receiver are disclosed. The method includes the steps of selecting a reference RE from an RE group including a plurality of REs, generating a preprocessing filter to be shared by the plurality of the REs belonging to the RE group based on channel information of the reference RE and generating detection signals for the plurality of the REs in a manner of compensating reception signals for each of the plurality of the REs using the preprocessing filter and channel information of each of the plurality of the REs.
Abstract:
Disclosed is a reception signal processing method of an MIMO receiver, which determines a detection order, which is the order of processing reception signals received by a plurality of layers through a plurality of antennas, by using channel information of a reference RE; generates a common multi-filter for processing the reception signals according to the detection order, generates an RE group, which includes a plurality of REs and in which the common multi-filter generated on the basis of the reference RE is to be shared, and applies the common multi-filter to each reception signal of the REs excluding the reference RE in the RE group such that detection signals are generated for the plurality of layers from each reception signal of the REs.
Abstract:
Disclosed is a method for processing a reception signal, and a MIMO receiver, the method comprising a step in which: a reference resource element (RE) is selected within an RE group that comprises a plurality of REs; generated is a preprocessing filter which will be shared by the plurality of REs in the RE group on the basis of channel information of the reference RE; on the basis of channel information of the plurality of REs other than the reference RE, generated is a covariance matrix with respect to each of the REs other than the reference RE; and reception signals with respect to each of the plurality of REs are offset by selectively using the preprocessing filter and the covariance matrix, and thereby detection signals with respect to the RE group are generated.
Abstract:
Disclosed are a method and a device in which a terminal receives a signal by using at least one distributed antenna unit (DU) and a center antenna unit (CU) controlling the at least one distributed antenna unit in a wireless communication system supporting a sidelink according to various embodiments. Disclosed are a method and a device therefor, the method comprising the steps of: receiving a first signal and a second signal by using at least one DU; transferring first information, which is decoding information for the first signal, from the at least one DU to the CU through a first interface; and decoding the second signal on the basis of the first information by using the CU, wherein a feedback signal for the second signal is transmitted on the basis of a time gap configured for the second signal, and the time gap is configured in consideration of a time error or a time delay related to the first interface.
Abstract:
Disclosed herein are a method of controlling a plurality of antenna remote units by a user equipment (UE) in a wireless communication system supporting sidelink, and an apparatus therefor. Disclosed herein are a method controlling a plurality of antenna remote units by a user equipment (UE) in a wireless communication system supporting sidelink including determining a first time interval based on channel state estimation capability or decoding capability, transmitting a control signal to each of the plurality of antenna remote units based on the first time interval, and performing channel state estimation or signal decoding based on a plurality of signals respectively received by the plurality of antenna remote units, wherein the control signal comprises control information indicating fixing of voltage gain of each of the plurality of antenna remote units during the first time interval, and an apparatus therefor.
Abstract:
According to various embodiments, disclosed are a method by which a terminal simultaneously transmits messages in at least two carriers in a wireless communication system supporting device to device (D2D) communication, and an apparatus therefor. Particularly, disclosed are a method by which a terminal simultaneously transmits messages in at least two carriers, and an apparatus therefor, the method comprising the steps of: independently sensing, by a carrier, a transmission resource, and calculating the ratio of transmission resources, which can be simultaneously transmitted on at least two carriers, on the basis of a result of the sensing by the carrier; setting the sensed transmittable transmission resource as a transmission candidate resource when the calculated transmission resource ratio is greater than or equal to a preset threshold ratio; and selecting a transmission resource to be used for the message transmission in each of at least two carriers within the transmission candidate resource.
Abstract:
A method by which a terminal transmits a data channel in a wireless communication system is disclosed. Particularly, in the disclosure, a plurality of reference signals are transmitted through a plurality of transmission beams within a first frequency band, first information related to the reception quality of at least one reference signal from among the plurality of reference signals is received within a second frequency band, a transmission beam through which the data channel is to be transmitted is determined on the basis of the first information, and the data channel is transmitted through the transmission beam within the first frequency band, wherein the first frequency band is higher than the second frequency band.