Abstract:
The present invention relates to a wireless communication system and more specifically, to a method and a device for transmitting and receiving data in a wireless communication system supporting a relay node. The method for transmitting data from a base station according to one embodiment of the present invention comprises: a step for generating a first code word by bit concatenating and encoding a first data in regards to a data terminal for the relay node; a step for generating a second code word by encoding a second data in regards to the terminal; and a step for transmitting the first code word to the relay node and the second code word to the terminal.
Abstract:
PURPOSE: An opportunistic power control method based on a cluster in a wireless communication system is provided to set up a femto cell interference tolerance based on large-scaled channel information and to restrict an integrated interference of a femto cell uplink signal. CONSTITUTION: A macro BS(Base Station)(810) broadcasts interference tolerance of a femto cell unit(a). A femto BS(820) allocates power to a terminal in consideration of path loss. The femto BS measures channel activity according to a femto cell group of a cluster unit. The macro BS changes the interference tolerance in order to meet a QoS(Quality of Service) of femto cell power allocation.
Abstract:
개시된 기술은 인지 무선 통신을 위한 시스템 및 스펙트럼 센서에 관한 것이다. 실시예들 중에서, 인지 무선 통신(Cognitive Radio)을 위한 시스템은 서로 독립적으로 무선 신호를 수신할 수 있도록 설치 공간에 분산 배치되고, 스펙트럼 센싱을 통하여 1차 사용자(Primary User: 이하, PU)의 출현 여부를 판단하기 위한 정보를 생성하는 복수의 스펙트럼 센서들; 및 상기 복수의 스펙트럼 센서들과 네트워크로 연결되고, 상기 복수의 스펙트럼 센서들로부터 상기 정보를 수집하는 수집 센터를 포함한다.
Abstract:
PURPOSE: A method for an individual cell SINR(Signal-to-Interference plus Noise Ratio) model is provided to measure the degradation of performance due to interference by the other user. CONSTITUTION: An interference control unit decides the maximum of a receiving SINR(Signal-to-Interference plus Noise Ratio) in a BS2(Base Station2)(S210). The interference control unit decides an approximation equation for the receiving SINR with the application of a correction coefficient to the equation of the receiving SINR(S220). The interference control unit obtains a correction coefficient for the minimization of difference between the receiving SINR and the approximation equation(S230). The interference control unit performs interference control on the basis of calculated parameters(S240).
Abstract:
PURPOSE: The detecting method for the wireless telecommunications system using the cooperation spatial multiplexing solves the fairness problem between the SC-FDMA user and the OFDMA user by similarly keeping the OFDMA signal detection performance and SC-FDMA signal detection performance. CONSTITUTION: The CP remover(312A, 312B) eliminates the cyclic prefix from the signal received from the RX-antenna(310A, 310B). The signal removed the cyclic prefix is inputted after the deserializer to the N-point FFT part. The N-point FFT part is proceed the N-point FFT about the input signal. The subcarrier demapper extracts reception symbols corresponding to the subcarrier in advance allocated from the FFT result.