摘要:
The present invention relates to a wireless communication system, and an adaptive multiple antenna transmission method and apparatus in accordance with antenna transmission power are disclosed. A method of performing multiple antenna transmission from a terminal to a base station according to one embodiment of the present invention may include the steps of: determining a reference value for a transmission power of each of a plurality of transmit antennas of the terminal; grouping the plurality of transmit antennas into a first group of transmit antennas and a second group of transmit antennas in accordance with the determined reference value; and transmitting a signal to the base station through at least one of the first group of the transmit antennas and the second group of transmit antennas.
摘要:
An apparatus and method for transmitting signals in a wireless communication system are provided. The apparatus includes N antennas, a processor coupled to the N antennas and configured to generate N transmit signals by performing precoding on R spatial streams for R spatial layers, and to transmit the N transmit signals respectively through the N antennas, wherein an information stream, a reference signal sequence, and a reference signal pattern are allocated to each of the R spatial layers, and the reference signal pattern is a time-frequency resource pattern used for transmission of the reference signal sequence, wherein each of the R spatial streams corresponds to one spatial layer, and wherein each of the R spatial streams is generated based on the information stream, reference signal sequence, and reference signal pattern allocated to a corresponding spatial layer.
摘要:
A method for performing a Coordinated Multi-Point (CoMP) operation and transmitting feedback information in a wireless communication system is disclosed. The method includes measuring interference levels or noise and interference variances of reference signals received from one or more neighbor cells, and transmitting to a serving Base Station (BS) information about the measured interference levels or noise and interference variances, and information about a Precoding Matrix Index (PMI) that a mobile station (MS) wants to restrict or recommend for a neighbor cell performing the CoMP operation.
摘要:
A method and apparatus for transmitting a signal in a wireless communication system are provided. The method includes: generating R spatial streams each of which is generated on the basis of an information stream and a reference signal; generating N transmit streams on the basis of the R spatial streams and a precoding matrix (where R
摘要:
The present invention relates to a method and apparatus for transmitting/receiving data in a wireless communication system. According to one aspect of the present invention, a data receiving method is provided wherein a mobile station in a wireless communication system uses a frame including a first subframe in which a physical downlink shared channel (hereinafter, referred to as “PDSCH”) includes a first cyclic prefix (hereinafter, referred to as “CP”) and a second subframe in which the PDSCH includes a second CP, wherein the data receiving method comprises a step in which the mobile station receives information on the length of the first CP from a base station, receives data from the base station through the first subframe, and removes the CP of the data using the information on the length of the first CP. The first CP and the second CP have different lengths.
摘要:
A method and apparatus for transmitting a signal in a wireless communication system are provided. The method includes: generating R spatial streams each of which is generated on the basis of an information stream and a reference signal; generating N transmit streams on the basis of the R spatial streams and a precoding matrix (where R
摘要:
A method of efficiently transmitting CoMP feedback information from an user equipment, which performs CoMP operation, in a wireless communication system to reduce inter-cell interference is disclosed. The user equipment requests a neighboring cell, which affects the user equipment through interference, to restrict use of a specific beam pattern group in a serving cell direction. In this case, whether the user equipment will request such restriction is determined based on a channel status value of the user equipment. If the user equipment determines to request such restriction, the user equipment transmits a request message to a serving base station, the request message requesting to restrict use of the specific beam pattern group. In this case, the user equipment performs scheduling and requests a specific neighboring cell to restrict use of the specific beam pattern group at a specific resource region.
摘要:
The present invention relates to a wireless communication system. In detail, the present invention relates to a technique for transmitting a downlink reference signal in a wireless communication system in which one base station simultaneously transmits signals to a plurality of user equipment, and a control signal containing information on the allocation of a reference signal of specific user equipment and layer information for specifying the transport layer of the specific user equipment is transmitted to the specific user equipment, wherein the information on the allocation of the reference signal contains information for indicating whether or not a reference signal pattern, other than the reference signal pattern in which the reference signal of the specific user equipment is multiplexed, is transmitted in a predetermined resource region.
摘要:
The present invention relates to a method for transmitting channel status information in a multi-carrier wireless communication system, according to one embodiment of the present invention, may include: receiving, at a receiving terminal, signals transmitted on N (N≧2) number of carriers from a transmitting terminal to the receiving terminal; determining, at the receiving terminal, channel status information for each of the N number of carriers from the received signals; and transmitting the channel status information for each of the N number of carriers on M (1≦M≦N) number of carriers from the receiving terminal to the transmitting terminal. The channel status information for each of the N number of carriers may be transmitted according to a channel status information reporting period for each of the N number of carriers and a channel status information reporting period offset.
摘要:
A method and apparatus for transmitting a downlink signal in a multiple input multiple output (MIMO) wireless communication system is disclosed. A method for receiving a downlink signal from a base station to a user equipment in a multiple input multiple output (MIMO) system, which supports dual layer transmission based on first and second antenna ports, comprises receiving downlink control information (DCI) through a downlink control channel; and receiving downlink data through a downlink data channel, the downlink data including one or more of a first transport block and a second transport block, wherein the downlink control information includes a new data indicator (NDI) for each of the first and second transport blocks, and if the first transport block is disabled and the second transport block is enabled, the new data indicator for the first transport block indicates an antenna port through which the second transport block is received.