Abstract:
Disclosed is a position determining method for a terminal in a communication system using multi-beams. An operation method of the terminal in accordance with the present invention comprises a step of receiving a first beam from a first point; a step of receiving a second beam from a second point; and a step of determining the position of the terminal by using information on the first beam and the second beam. The position determining method enables the system using the multi-beams to determine the position of the terminal by using the angle of the beam and beam start and/or final coordinate information without a positioning device such as a GPS when receiving two or more valid beams.
Abstract:
직교 주파수 분할 다중 접속(Orthogonal Frequency Division Multiple Access: OFDMA) 통신 시스템에서, 전송 장치는 상향 링크 4계층 PUSC 모드에서, 4x3구조를 갖는 복수의 타일을 시간 축 또는 주파수 축으로 연결하고, 복수의 타일의 제1 꼭지점에 인접하는 복수의 심볼 위치 중 어느 하나와 제1 꼭지점과 대각선으로 마주보는 복수의 타일의 제2 꼭지점에 인접하는 복수의 심볼 위치 중 어느 하나에 어느 한 계층에 대응하는 파일롯을 각각 배치한다. 여기서, 제1 꼭지점 또는 제2 꼭지점에 인접하는 복수의 심볼 위치 중 복수의 파일롯이 배치되지 않은 나머지에 널 심볼을 배치한다. 이와 같이 하면, 수신 장치가 n개의 타일로부터 n개의 채널값을 구할 수 있고, 추정된 n개의 채널값을 선형 보간 방식에 적용하여 n개의 타일에 대한 전체 채널의 채널값을 추정할 수 있다. OFDMA, 채널 추정, 4계층, 상향 링크, 파일롯 배치, 직교 배치
Abstract:
A data transceiving method between a narrow-band device and a broadband device and a communication device using the same are disclosed. The data transceiving method for a machine-to-machine service comprises a step of setting a band applied to a base station for the base station within a frequency band supported by the base station; and a step of transceiving data to the base station through the frequency band. Therefore, the present invention enables efficient data transmission between a base station supporting a broadband and a machine-to-machine supporting a narrow-band using a frequency band applied to the base station and the machine-to-machine device. [Reference numerals] (AA) Start; (BB) No; (CC) Yes; (DD) End; (S201) Specific information exists?; (S202) Set a frequency band based on the specific information; (S203) Receive band information from a base station; (S204) Set the frequency band based on the band information; (S210) Transceive data through the set frequency band
Abstract:
본발명은재전송이필요한신호벡터에대하여유효신호대잡음비(ESNR: Effective Signal to Noise Ratio)가최대가되도록하는전처리행렬을코드북에서선택하여송신단으로피드백한다. 따라서신호벡터의재전송이이루어진후에유효신호대잡음비가최대가되기때문에, 재전송의수신오류확률을최소화할 수있다.
Abstract:
PURPOSE: A wireless transmission apparatus and method thereof are provided to reduce the installation charges of a base station by installing base stations on one location by enabling network service providers to share wireless frequency resources. CONSTITUTION: Plural service provider networks transmit signals by sharing one FDMA(Frequency Division Multiple Access) transmission method. A frequency allocation unit(110) allocates one or more carrier groups composed of continuous sub carriers to each service provider network. A signal transmission unit(120) transmits the signals by using the allocated sub carrier waves. The service provider networks effectively use restricted wireless frequency resources.