摘要:
Disclosed is a signal transmission method comprising a feedback information receiving step of receiving a transmission rate and channel state information for transmission from a receiving end, a step of generating a signal to be transmitted by using a multi-antenna in accordance with the transmission rate, a step of performing a precoding on the generated signal by using the precoding matrix of the nested structure selected from a predetermined codebook in accordance with the transmission rate, and a step of transmitting the precoded signal. Said codebook includes a precoding matrix set in which a pre-coding matrix according to a first number of streams is not included in a precoding matrix according to a second number of streams greater than the first number of streams.
摘要:
With regard to any nucleotide and/or amino acid sequence disclosed in the international application and necessary to the claimed invention, the international search was carried out on the basis of:
摘要:
A method for transmitting/receiving signals in a mobile communication system, a pilot configuration of a mobile communication system capable of transmitting much more data using a conventional pilot signal, a channel estimation method, and a receiving method are disclosed. A method for transmitting a signal equipped with a training symbol in a mobile communication system which includes a transmission end capable of transmitting an output signal equipped with a training symbol for channel estimation of a reception end, includes the steps of: a) adding training symbols having the same amplitude to data symbols transmitted via subcarriers, and calculating the output signal transmitted via the subcarriers; and b) transmitting the calculated output signal via the subcarriers.
摘要:
The present invention provides a data transmission device and method in a wireless communication system. The device comprises a processor which is connected with the M antennas and which is formed so as to generate data to be transmitted through the M antennas, on the basis of a precoding matrix; the precoding matrix is generated based on a plurality of matrices; and a first matrix, which is one matrix among the plurality of matrices, is selected from within a codebook for N antennas (where N
摘要:
A method for transmitting a pilot signal in a downlink MIMO (Multi Input Multi Output) supporting multiple transmission antenna is disclosed. The method includes transmitting a subframe to which cell-specific pilot symbols and User Equipment-specific (UE-specific) pilot symbols are mapped, in which the cell-specific pilot symbols are mapped to a first region of the subframe and the UE-specific pilot symbols are mapped to a second region of the subframe.
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:
A base station in a wireless communication system transmits a CSI-RS of a cell every 1×N subframes or 1×N ms with muting CSI-RS REs of a neighboring cell every m×N subframes. A BS can estimate channel state of the neighboring cell with higher accuracy by using a CSI-RS of the neighboring cell received in the muted REs.
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 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:
A method and an apparatus for transmitting data in a multi-antenna system are provided. The method includes: selecting a plurality of modulation symbol blocks including at least one modulation symbol from total modulation symbols of a codeword, repeating the plurality of modulation symbol blocks in a time domain, combining the repeated plurality of modulation symbol blocks, and performing discrete Fourier transform (DFT) on the combined plurality of modulation symbol blocks.