摘要:
A method for interference alignment in wireless network having 3 transmitters and 3 receivers which are equipped with M antennas is provided. The method comprising: transmitting, performed by each of the 3 transmitters, a pilot signal known to the 3 receivers; estimating, performed by each of the 3 receivers, each channel from transmitter; transmitting, performed by each of the 3 receivers, feedback information to target transmitter; and determining, performed by transmitter 2 and transmitter 3, a precoding vector; wherein a degree of freedom(DoF) of a transmitter 1 is (M/2−α), a DoF of the transmitter 2 or the transmitter 3 is M/2.
摘要:
Disclosed are a feedback-transmitting method and data-transmitting method, and a method for generating a codebook that can be used in a system such as LTE-A. When multiple base stations operate in a cooperative mode, using a codebook generated according to the present invention, an existing codebook for single cell transmission can be used to generate a codebook for cooperative transmission.
摘要:
A method for transmitting data in a multi-antenna system includes determining a candidate mode in which a maximum upperbound approximation of an average total data rate is maximized as a transmission mode, selecting a user equipment to receive data by using the transmission mode, and transmitting data to the selected user equipment.
摘要:
In a communication system, a signal transceiver generates an upper pre-encoding symbol stream and a lower pre-encoding symbol stream by pre-encoding an upper transmission vector and a lower transmission vector according to a pre-encoding scheme when the upper and lower transmission vectors to be transmitted are input. The signal transceiver generates a space-time mapping matrix by space-time mapping the upper and lower pre-encoding symbol streams according to a space-time mapping scheme based on the number of transmit antennas to be used in the signal transceiver. The signal transceiver generates and transmits a codeword according to whether a null transmission is present in the space-time mapping matrix.
摘要:
A method for transmitting data in a multi-antenna system includes determining a candidate mode in which a maximum upperbound approximation of an average total data rate is maximized as a transmission mode, selecting a user equipment to receive data by using the transmission mode, and transmitting data to the selected user equipment.
摘要:
Provided is a method and a device for generating a precoding matrix in a wireless communication system. The method for generating the precoding matrix comprises a step of receiving from a terminal feedback including information on the error angle θ of channel direction information (CDI), which indicates the direction of a channel direction vector, and a step of generating the precoding matrix based on the information on the error angle θ of the CDI, wherein the error angle θ of the CDI indicates the angle between the channel direction vector and a quantized channel direction vector, and includes at least one of a channel quantization error component, a channel feedback delay error component, and a channel estimation error component.
摘要:
A power control method for interference alignment in wireless network having K transmitters and K receivers is provided. The method includes: receiving, performed by receiver n (n is an integer, 1≦n≦K−1), a power indication signal of transmitter n+1 from the transmitter n+1; determining, performed by the receiver n, power of transmitter n; and transmitting, performed by the receiver n, a power indication signal of transmitter n to the transmitter n, wherein the power of transmitter n is determined based on a residual interference of the receiver n, and the power indication signal of transmitter n indicates a minimum transmission power or a maximum transmission power of transmitter n.
摘要:
Provided are an antibody for sexing sperms and use thereof, and more particularly, a composition for and a method of sexing sperms by using the antibody, and a method of producing an animal of a particular sex. In the present disclosure, it was confirmed that agglutination of Y chromosome sperms may be induced by treatment of the antibody, thereby easily sorting X chromosome sperms and Y chromosome sperms. Therefore, it is possible to produce a large number of customized animals of a particular sex and to selectively produce livestock of a desired sex, and therefore, it is expected to contribute to planed breeding, breeding improvement, and efficient management.
摘要:
A feedback method for interference alignment in wireless network having K transmitters and K receivers, the method including: transmitting, by a transmitter n−1, a precoding vector of the transmitter n−1 (n being an integer between 2 and K−1) to a receiver n+1; calculating, by the receiver n+1, a precoding vector of a transmitter n using the precoding vector of the transmitter n−1; and transmitting, by the receiver n+1, the precoding vector of the transmitter n to the transmitter n.
摘要:
Provided is a method and a device for precoding in a wireless communication system. The method for precoding comprises the following steps: generating a first precoding matrix, W1, for deciding the transmission power of one transmission antenna from a plurality of transmission antennas as the maximum power per antenna; generating a zero forcing (ZF) precoding matrix, Ti, which does not influence the transmission antenna having the power which is decided as the maximum power per antenna, based on the (i−1)th precoding matrix Wi−1 (i=2,3, . . . ); determining a constant which has the transmission power of one transmission antenna from the rest of the transmission antennas, which do not have the transmission power as the maximum power per antenna, based on the Ti; and generating the