摘要:
The present invention provides a method and apparatus for generating a reference signal sequence by user equipment (UE) in a wireless communication system. The UE receives a UE-specific sequence group hopping (SGH) parameter that is specific to itself, and generates a reference signal sequence based on a base sequence in each slot unit. The base sequence is classified into sequence-group numbers determined in each of the slot units by the UE-specific SGH parameter indicating whether SGH has been carried out, and base sequence numbers.
摘要:
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. According to one embodiment of the present invention, a method for transmitting downlink hybrid automatic repeat request (HARQ) information on a uplink multiple codeword transmission comprises the steps of: receiving the uplink multiple codeword transmission; generating HARQ information on each of multiple codewords, on the basis of the result of decoding each of the multiple codewords; modulating the HARQ information; and transmitting the modulated HARQ information through one or more physical HARQ indicator channels (PHICHs).
摘要:
A ratio of data transmission power of a layer per RE to RS transmission power of the layer per RE is predefined according to rank. A BS determines downlink transmission power for a PDSCH according to the predefined rank and a UE assumes that the PDSCH and UE-specific RS(s) for the PDSCH is transmitted with power satisfying the ratio.
摘要:
Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences in which cyclic shift values that are different from each other are allocated to the respective plurality of layers, and generates an orthogonal frequency division multiplexing (SC-FDMA) symbol to which the plurality of reference signal sequences are mapped. The SC-FDMA symbol is transmitted to a base station via a plurality of antennas. Each of the reference signal sequences is multiplied by either +1 or -1 in accordance with an orthogonal covering code (OCC) index corresponding to the cyclic shift field in a DCI format transmitted via a physical downlink control channel (PDCCH) for each layer.
摘要:
The present invention relates to a wireless communication system, and discloses a method and apparatus for transmitting/receiving a signal in a wireless communication system that supports multi-user MIMO transmission. According to one embodiment of the present invention, a method in which a mobile station receives a signal in a wireless communication system that supports multi-user MIMO transmission, comprises: a step of receiving information on the entirety of the transmission rank of the multi-user MIMO transmission; a step of receiving a reference signal and data for demodulation for the mobile station on the basis of the information on the entirety of the transmission rank; a step of acquiring channel information on the mobile station from the reference signal for demodulation; and a step of demodulating said data on the basis of the acquired channel information.
摘要:
The present invention relates to a wireless communication system, and in particular, to a method and an apparatus for transmitting a downlink reference signal in a wireless communication system that supports multiple antennas. The method for transmitting a channel status information reference signal for a maximum of eight antenna ports according to one embodiment of the present invention comprises: in a base station, mapping the channel status information reference signal for a maximum of eight antenna ports onto a data region of a downlink subframe having a general cyclic prefix (CP) configuration, according to a preset pattern; and in the base station, transmitting the downlink subframe into which the channel status reference signal for the maximum of eight antenna ports has been mapped, wherein the preset pattern defines the channel status information reference signal for the maximum of eight antenna ports to be mapped onto two OFDM symbols of the data region in the downlink subframe and then mapped to at least one of four subcarrier positions in each of the two OFDM symbols, and wherein the four subcarrier positions defined by the preset pattern may be two consecutive subcarrier positions and two other consecutive subcarrier positions spaced apart by four subcarriers.
摘要:
Abstract: The present invention relates to a wireless communication system, and more particularly to a method and an apparatus for transmitting uplink signals in a wireless communication system for supporting multiple antenna transmissions. The method for transmitting the uplink signals in the wireless communication system for supporting the multiple antenna transmissions according to an embodiment of the present invention comprises the steps of: receiving a PDCCH (Physical Downlink Control Channel) including uplink grant information for indicating a first rank value; precoding uplink data on the basis of the first rank value; precoding uplink control information on the basis of a second rank value; multiplexing the precoded uplink data and the uplink control information on a PUSCH (Physical Uplink Shared Channel) resource; and transmitting the multiplexed uplink data and the uplink control information. The uplink control information can include channel state information and the second rank value can be less than or equal to the first rank value.
摘要:
A method of transmitting uplink control information of a user equipment is provided. The method includes: generating the uplink control information repeatedly as many as a uplink data transmission layer; modulating the uplink control information to generate a plurality of repeated modulation symbol; applying a precoding matrix to the plurality of repeated modulation symbols to generate a plurality of first precoded symbol; and transmitting the plurality of first precoded symbols respectively through a plurality of antennas in an uplink subframe comprising a plurality of single carrier frequency division multiple access(SC-FDMA) symbols in a time domain and a plurality of subcarriers in a frequency domain.
摘要:
The present invention relates to a wireless communication system, and provides a method and an apparatus for transmitting a downlink reference signal in the wireless communication system. According to one embodiment of the present invention, a method for a base station to transmit a downlink signal by using two or more layers, comprises the steps of: multiplexing and transmitting a reference signal for the two or more layers on the basis of a reference signal pattern on a data region of a downlink subframe: and transmitting data for the two or more layers on the data region of the downlink subframe, wherein the reference signal for the two or more layers is a dedicated reference signal that is used to demodulate the data for the two or more layers on a receiving end, and in the multiplexing step of the reference signal, the reference signal for the two or more layers is code-division-multiplexed by an orthogonal code of a length of at least 2.
摘要:
The present invention relates to a wireless communication system, and more particularly, to a method and an apparatus for transmitting reference signals in uplink MIMO transmission. According to one embodiment of the present invention, the method for transmitting uplink signals through a terminal in the wireless communication system comprises the steps of: receiving control information including the information on a cyclic shift and/or an orthogonal cover code; allocating the multiplexed reference signals onto an uplink subframe; and transmitting the subframe through a multi-antenna. When the uplink MIMO transmission is multiuser MIMO transmission, the reference signals of the terminal and the reference signals of other terminals can be multiplexed by using the orthogonal cover code.