Abstract:
PURPOSE: An apparatus and a method for determining a channel state indicator in a mobile communication system are provided to perform efficient AMC(Adaptive Modulation And Coding) scheduling which is matched with a channel condition through a simple additional operation process by using a mean square channel matrix method. CONSTITUTION: A terminal receives signals(701). The terminal estimates a channel matrix by using a reference signal from the received signals(703). The terminal outputs a predetermined value(705). The terminal calculates a mean value by leveling a value outputted from the former step(707). The terminal determines a predetermined target value by applying an equation based on the calculated value(709, 711).
Abstract:
PURPOSE: In the wireless telecommunications system, by forming a demapper including the linear portion and correction the input metric formation apparatus and method of decoder supplement the HARQ performance degradation at the low SNR domain of the piecewise linear demapper. CONSTITUTION: A linear part(410) calculates the linear component of the demodulated received signal. A correction part(420) respectively calculates the first of the demodulated received signal as described above and second non-linearity. Correction revises the first and second non-linearity according to the output of the linear portion. Correction comprises a first nonlinear component calculator(421) calculating the first nonlinear component value in the demodulated received signal as described above.
Abstract:
본 발명은, 단말간 직접 통신을 위한 간섭 제어 방법에 있어서, 제1단말의 위치가 미리 결정된 임계 조건을 만족하는 제1지역에 포함되는 지 확인하는 과정과, 상기 제1지역에 위치함을 확인한 경우, 상기 제1단말이 상기 직접 통신의 대상 단말을 탐색하는 신호의 가용 자원 중 상기 제1지역의 전용 자원을 구성하는 일부 자원을 상기 신호의 자원으로 결정하는 과정을 포함한다.
Abstract:
The present invention relates to a link scheduling method of a transmission node and an interference information reporting method of a reception node in a wireless communication system which directly communicates between the transmission node and the reception node. The link scheduling method of the transmission node according to the present invention includes the steps of: receiving the interference information of one or more reception nodes by one or more transmission nodes from one or more reception nodes; performing link scheduling based on the interference information; and transmitting data according to the link scheduling result. [Reference numerals] (a) Transmission node in which there is data to be transferred: scheduling according to an interference matrix; (AA) Scheduling links in which use the interference matrix; (b) Interference matrix after calculating the scheduling; (BB) Desired signal; (CC) Interference signal; (DD) Scheduled link; (EE) Yielded link; (FF) B_INTF [nth traffic section] =; (GG) Except from a nth traffic section; (HH) Use in the nth traffic section
Abstract:
PURPOSE: An apparatus for transmitting transmission rate related information for receiver selection in a multi cell MIMO downlink network and a method thereof, a receiver selection apparatus in the multi cell MIMO downlink network and a method thereof and a system thereof are provided to transmit the transmission rate related information for receiver selection in the multi cell MIMO downlink network which can achieve maximum sum transmission rate by calculation of low complexity only. CONSTITUTION: A receiving part (410) receives a pilot signal from a transmitter. A calculation part (420) calculates approximated sum transmission rate information by assuming a nonlinear receiver on the basis of the received pilot signal. The calculation part calculates the approximated sum transmission rate, by assuming the nonlinear receiver on the basis of the sum of variation matrix of other receivers existing in a currently belonging receiver group and variation matrix of a self-designated signal. A transmission part (430) transmits the approximated sum transmission rate information to the transmitter. [Reference numerals] (410) Receiving part; (420) Calculation part; (430) Transmission part; (440) Communication execution part
Abstract:
PURPOSE: A communication device for a network using a distributed interference alignment technique and a distributed interference alignment method are provided to reduce the number of repetitive transmission of channel information for distributed interference alignment without degrading a sum rate by stopping repetitive transmission in a period when a sum rate is optimized. CONSTITUTION: A reception unit(910) receives a signal including channel information from a plurality of transmission devices. A calculation unit(920) forms an interference suppression matrix minimizing the interference of a signal. The calculation unit calculates the formed interference suppression matrix in the signal. A determining unit(930) determines whether the interference alignment of the signal is stopped or not based on interference signal power and sum rate of the signal calculated by the interference suppression matrix. [Reference numerals] (900) Communication device for a network using distributed interference alignment technique; (910) Reception unit; (920) Calculation unit; (930) Decision unit; (940) Transmission unit
Abstract:
PURPOSE: A decoding sequence controlling apparatus and a method thereof are provided to calculate summation values of data transfer rates when considering all decoding sequences and to determine a decoding sequence. CONSTITUTION: A transfer rate calculating unit(155) calculates data transfer rates by adding a first CQI(Channel Quality Indicator) table and a second CQUI table. The first CQI table is matched with an effective SNR of a first layer. The second CQI table is matched with an effective SNR of a second layer. A decoding sequence controlling unit(156) compares the totaled data transfer rates. The decoding sequence controlling unit determines a decoding sequence.