摘要:
Disclosed is a channel estimation method using a cooperative multi-point (CoMP) reference signal in a multi-cell environment. The method comprises a CoMP reference signal receiving step of enabling a terminal to receive, from each of the cells that perform a CoMP operation, a CoMP reference signal where an orthogonal code is applied to each of the cells; a channel estimation step of enabling the terminal to estimate, using said CoMP reference signal, channels of each of the cells which perform said CoMP operation; and a channel status feedback information transmitting step of enabling the terminal to transmit channel status feedback information to each of the cells.
摘要:
The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for transmitting an RS (Reference Signal) from a transmission end. The present invention relates to an RS transmission method and an apparatus therefore, comprising the steps of: confirming RS resources which are defined according to each layer; and transmitting the precoded RS for the layers to a receiving end through a multiple antenna, wherein the RS resource includes a 1st index for indicating an RS resource pattern group in which the precoded RS is mapped within a resource block and a 2nd index for indicating a code resource for multiplexing the precoded RSs within the RS resource pattern group.
摘要:
A method and apparatus are provided for data transmission using a plurality of resources in a multiple antenna system. An m (m>1) number of bits from each encoded bit are mapped onto a resource to form a plurality of modulation symbols. With respect to said plurality of modulation symbols, spatial processing is performed according to a plurality of resources and a plurality of antennae to generate a plurality of transmission symbols. Each of said plurality of transmission symbols is transmitted via each of the corresponding multiple antennae.
摘要:
Provided are a reference signal transmitting method and device in a multi-antenna system. A terminal generates a plurality of reference signal sequences to which different cyclic shift values are allocated, respectively, generates an orthogonal frequency division multiplexing (OFDM) symbol to which the plurality of reference signal sequences are mapped, and transmits the OFDM symbol to a base station through a plurality of antennas. Each cyclic shift value allocated to each reference signal sequence is determined on the basis of a parameter n indicated by a cyclic shift field transmitted from a physical downlink control channel (PDCCH).
摘要:
A method and apparatus are provided for data transmission using a plurality of resources in a multiple antenna system. An m (m>1) number of bits from each encoded bit are mapped onto a resource to form a plurality of modulation symbols. With respect to said plurality of modulation symbols, spatial processing is performed according to a plurality of resources and a plurality of antennae to generate a plurality of transmission symbols. Each of said plurality of transmission symbols is transmitted via each of the corresponding multiple antennae.
摘要:
Disclosed is a method for transmitting a sounding reference signal from a mobile terminal that includes plural antennas. Different plural sounding reference signal sequences that have mutual orthogonality are mapped to each antenna, and then transmitted. Or, the same sounding reference signal sequence is mapped to the plural antennas after precoding or cyclic delay diversity processing, and then transmitted.
摘要:
A data transmission method using spatial multiplexing is disclosed. The data transmission method using spatial multiplexing includes modulating at least one codeword to generate at least one modulation symbol, mapping the at least one modulation symbol to a layer whose number is determined according to its rank to generate a layer-mapped symbol stream, performing discrete Fourier transform (DFT) on the layer-mapped symbol stream to generate a frequency domain symbol stream, performing precoding on the frequency domain symbol stream, mapping the precoded frequency domain symbol stream to subcarriers, and then performing inverse fast Fourier transform (IFFT) on the precoded frequency domain symbol stream-mapped subcarriers to generate SC-FDMA symbols; and transmitting the SC-FDMA symbols by using a plurality of transmission antennas. Spatial multiplexing having a low PAPR can be possibly performed in an SC-FDMA system.
摘要:
Disclosed herein is a method of generating an uplink reference signal in a system supporting a plurality of uplink access schemes. The method includes, at a base station, transmitting reference signal configuration information indicating the configuration of a reference signal to be transmitted in uplink, which is generated according to the plurality of uplink access schemes, to a user equipment which is set to operate in an uplink access scheme corresponding to the information, and receiving a subframe including the reference signal generated based on the reference signal configuration information from the user equipment. The reference signal configuration information includes a cyclic shift value of a sequence of the reference signal.
摘要:
A method for allocating uplink and downlink physical channels to improve throughput of a wireless access system is disclosed. A method for allocating channels to optimize a wireless access system which supports radio frequencies comprises configuring one or more physical channels in a transmitter; allocating first physical channels to a receiver considering features of the one or more physical channels; and transmitting one or more control channels to the receiver through a predetermined physical channel of the first physical channels, the control channels including configuration information of the first physical channels allocated to the receiver.
摘要:
A method of performing hybrid automatic repeat request (HARQ) in a multiple-antenna system includes receiving a plurality of codewords through an uplink channel, generating acknowledgment (ACK)/not-acknowledgment (NACK) signals respectively for the plurality of codewords, and transmitting the plurality of ACK/NACK signals through a downlink channel in association with a resource used in transmission of the uplink channel. ACK/NACK signals for each codeword in multiple antenna system can be transmitted.