Abstract:
본 발명은 터보 부호의 복호화 방법 및 장치에 관한 것이다. 본 터보 부호의 복호화 방법은, 수신한 데이터의 재전송 여부를 판단하여 재전송 데이터이면, 저장된 오류 데이터 및 재전송 데이터의 시스터메틱 비트의 LLR 값을 산출하여 비교하는 단계, LLR 값의 비교 결과에 따라 시스터메틱 비트에 가중치를 부여하여 결합하는 단계, 및 결합 데이터를 복호화하는 단계를 포함한다. 본 발명에 따르면, 재전송 데이터의 시스터메틱 비트와 재전송 데이터 이전에 전송된 오류 데이터의 시스터메틱 비트에 가중치를 두어 결합하고, 결합 데이터를 복호화함으로써 복호 확률을 높일 수 있다. 터보 부호, LLR, 시스터메틱 비트
Abstract:
PURPOSE: A wireless communication system in heterogeneous networks and a method thereof are provided to prevent an increase of frequency synchronization time which can occur when a lot of RATs are connected. CONSTITUTION: A synchronization unit(320) synchronizes a frequency according to a frequency reference signal received through a CPC(Cognitive supporting Pilot Channel). A cooperative communication unit(330) performs cooperative communication with the first RAT(Wireless Access Technology) in the CPC coverage by the synchronization. The cooperative communication unit transmits an access permission signal to the selected first RAT. The cooperative communication unit receives the first RAT signal from the first RAT. The cooperative communication unit performs cooperative communication with the first RAT according to the received first RAT signal.
Abstract:
본 발명은, 복수개의 단일 시스템이 복합적으로 운영되는 통합 시스템에 대해, 통합 시스템 내에서 공통으로 사용되는 표준 네트워크 상태 지수를 사용하여, 비용함수를 결정하는 단계와, 비용함수에 기초하여, 자원을 할당하는 단계를 포함하는 통합 시스템의 자원 할당 방법에 관한 것이다. 이에 의하여, 여러 개의 시스템이 복합적으로 운영되는 통합 시스템 내에서 각 시스템들과 사용자들 간의 상황과 요구 조건들을 최대한 반영하고 효율적인 자원관리가 가능해진다. 비용 함수, 표준 네트워크 상태 지수, 통합 시스템
Abstract:
The sequence multiplex transceiving method for reducing the PAPR (Peak-to-Average Power Ratio) is provided to obtain the high PAPR reduction efficiency in case a small amount of dummy sequence is inserted. The input entry sequence is successively inputted. The length information of set up one or more redundant bit is inputted in advance(S210). The length information of the redundant bit is the bit number of the redundant bit. The input entry sequence comprises the length information of the redundant bit. The input entry sequence is transformed to the input data sequence of the parallel configuration(S220). The half repair high speed inverse fourier input data sequence is produced by performing the XOR (Exclucive OR) computing on the transformed input data sequence and redundant bit (S230). The length of the computed redundant bit and length information of the set-up redundant bit are compared (S240). The half repair high speed inverse fourier input data sequence is computed by the half repair high speed inverse fourier(S250). The OFDM signal is generated by changing sequence to the serial type.
Abstract:
An apparatus and a method for modulo N operation are provided to perform efficiently a modulo 3 for an arbitrary integer N by adding a logical circuit in accordance with twice AND operations for outputting a modulo operation result more rapidly. A method for modulo N operation includes the following several steps. An apparatus for modulo N operation checks whether a specifically inputted integer value N is for an M1 bit operation and performs an AND operation for lower M1 bits and a binary number of 0101(S200,S202). The apparatus determines an AND operation result and changes output register values according to the result(S204). If the result is a binary number of 0101, the apparatus adds 2 to an output register(S206), if 0, adds 0 to the output register(S216) and if neither 0101 nor 0, adds 1 to the output register(S218). Then, the apparatus performs an AND operation for the lower 4 bits and a binary number of 1010(S208), determines an AND operation result(S210), and changes the output register values according to the result. If the result is a binary number of 1010, the apparatus adds 4 to the output register(S212), if 0, adds 0 to the output register, and if neither 1010 nor 0, adds 2 to the output register(S222). Then, the apparatus performs a 4 bit shift right for the inputted integer N(S214). Then, the apparatus abandons corresponding bits, and repeats the steps of S202 to S222. In case of a 4*M bit operation, the apparatus performs the shift right M times(S226), and checks whether the result value is lower and equal to 3(S228). The apparatus repeats the steps of S228 to S248 until the result value is 3.
Abstract:
An apparatus and a method for synchronizing a system of a base station modem based on a DSP(Digital Signal Processor) are provided to facilitate time synchronization of the system between base stations by performing synchronization and controlling a point of time of a transmitting signal by measuring a difference value between reference clocks for synchronization and the DSP. An apparatus for synchronizing a system of a base station modem based on a DSP comprises a DSP chip(200) and an external device(202). The DSP chip is mounted on the base station modem. When a control signal for synchronizing the system is received in the DSP chip, predetermined numbers of digital transmitting signal samples are made and transmitted, and a point of transmitting time is adjusted according to a control signal for adjusting the point of transmitting time of the transmitting signal. The external device transmits the control signal for synchronizing the system to the DSP chip and receives the digital transmitting signal samples. The signal sample is compared with a synchronization clock signal received from a base station controller, and a time distance between two signals is calculated. The external device transmits the control signal for adjusting the point of transmitting time of the transmitting signal of the DSP chip for matching the time distance between two signals so as to match a reference point of transmitting time of the transmitting signal of the DSP chip and a point of time of the synchronization clock signal.
Abstract:
본 발명은 고속 푸리에 변환 시스템의 메모리 주소 생성 방법 및 그를 이용한 트위들 팩터 생성 장치에 관한 것이다. 고속 푸리에 변환(FFT: Fast Fourier Transform) 프로세서를 구현함에 있어, 메모리 주소를 계산하는데 필요한 트위들 팩터의 수를 줄여 메모리의 면적을 감소시킨다. 즉, R2 2 SDF(Radix-2-Square Single-path Delay Feedback) 방식의 FFT 프로세서 구현에 있어 트위들 팩터가 저장될 메모리 크기를 로 줄임으로써, IC 칩 면적을 최소화하고 전력 소비를 줄일 수 있다. 고속 푸리에 변환, 트위들 팩터, 회전 인자, 메모리
Abstract:
An apparatus and a method for generating an OVSF(Orthogonal Variable Spreading Factor) code are provided to efficiently generate an OVSF code by dividing a small memory into several tables. A memory unit(100) stores an OVSF code including plural tables divided according to storage capacity. An OVSF code generating unit(200) generates the OVSF code, and divides it by size for which limited storage capacity of the memory unit(100) is considered, and tables the divided codes to store them in the memory unit(100). An OVSF code detecting unit(300) selects a table in which the OVSF code to be detected is stored and searches a storage address, and detects the OVSF code stored in the memory unit(100) corresponding to the searched storage address.
Abstract:
An SCA-based application system and a method for exchanging a component in operation of the same are provided to prevent data from being transmitted to wrong object reference by replacement of the component without additional connection for transferring an event, and prevent system down even if abnormality occurs in one of the components. An XML(eXtensible Markup Language) file storing part(130) stores an XML file, which is connection information among the components(150,160). An event channel(140) transfers operation stop state information received from the specific component to all components excluding the specific component. An assembly controller(120) deletes a part related to the specific component from mapping information if the operation stop state information is received from the specific component through the event channel. The controller transfers the updated mapping information updated by mapping runtime information of the new component to the XML file to all components in the system if the new component is operated.
Abstract:
본 발명은 이중 모드를 지원하는 SCA 기반 기지국 시스템에서 소프트웨어 컴포넌트의 초기화 및 교체 방법 그리고 이를 위한 애플리케이션 패키지 구조에 관한 것이다. 이를 위하여 본 발명은, 소프트웨어 컴포넌트와 어셈블리 컨트롤러 컴포넌트로 구성되는 애플리케이션 패키지를 제공하며, COBRA 및 재구성 코어 프레임워크를 구동한 뒤, 애플리케이션 패키지를 다운로드하고, 공통 라이브러리 컴포넌트 및 디바이스 관련 컴포넌트를 구동한 뒤, 다운로드된 애플리케이션 패키지의 압축을 해제하여 구동시켜 초기화하는 방법을 제공한다. 또한, 하나 이상의 특정 소프트웨어 컴포넌트에 대한 교체 요구를 수신하면, 교체 요구된 소프트웨어 컴포넌트의 실행을 중지한 뒤, 교체될 애플리케이션 패키지를 다운로드하고, 압축을 해제하여 구동시키는 교체 방법을 제공한다. 본 발명에 의하면, SCA 기반의 시스템에서 컴포넌트 파일의 효율적인 관리 및 컴포넌트의 변경과 추가가 용이해지고, 컴포넌트 교체시에도 운용중인 기지국에 영향을 적게 주면서, 안정적으로 시스템을 재구성할 수 있다. 이중모드, SCA, SDR, 기지국, 애플리케이션, 컴포넌트, 교체, 패키지