Abstract:
본 발명은 직교 정규 테이퍼링을 이용한 가간섭성 위상 강화 스펙트럼 검출 장치 및 방법에 관한 것으로서, N x M 데이터를 M개 블록으로 분할하고, 상기 분할된 블록별 데이터를 고속(이산) 푸리에 변환하는 과정과, 상기 데이터 블록을 직교 정규 테이퍼링하여 확장하고, 상기 확장된 데이터 블록을 앙상블 영역으로 고속(이산) 푸리에 변환하는 과정과, 테이퍼 개수만큼 더 반응하는 신호들을 같은 성질의 신호들로 분류하여 재조합하는 과정을 포함하여, 노이즈 감쇄 효과를 추가적으로 획득할 수 있는 이점이 있다. 전력 스펙트럼, 직교 정규 테이퍼링, 앙상블, 창함수
Abstract:
PURPOSE: An apparatus and a method for decoding a low density parity check code using an improved bit reversal algorithm and a recording medium for the same are provided to renew the reliability of a variable node by using a bit reversal algorithm. CONSTITUTION: A decoder initializes an iteration number to be 0. The decoder sets a maximum iteration number(S11). The decoder calculates a weighted value according to a mathematical formula from received signals(S13). The decoder calculates an inversion function according to the mathematical formula(S15). The calculated inversion function is compared with a predetermined threshold value(S17). A hard decision vector is updated according to the value of controlled received signals(S19). A syndrome vector is calculated by applying the updated hard decision vector to the mathematical formula(S21). Decoding is successfully completed(S23). The iteration number is compared with the maximum iteration number(S25). The decoder is closed by declaring decoding failure(S27).
Abstract:
PURPOSE: A method and device for modeling a virtual channel for dispersion video compression technique are provided to perform modeling of a virtual channel to coincide a Laplacian distribtuiosn of a channel parameter of a virtual channel with a Laplacian distribution. CONSTITUTION: A difference frame is generated(S100). A 4x4 DCT(Discrete Cosine Transform) conversion about the difference frame is operated(S110). Samples in predetermined reliable section among samples are selected(S120). A sample dispersion based on reliable section area is calculated(S130). A virtual channel parameter is calculated(S140). By modeling a virtual channel by using the virtual channel parameter, optimum probability distribution is obtainer(S150).
Abstract:
PURPOSE: An apparatus and a method for decoding for a non binary low density parity check decoding are provided to reduce the deterioration of performance by using a new message structure of an EMS(Extended Min-Sum) decoding algorithm. CONSTITUTION: A demodulator(610) demodulates a signal received from a channel and generates LLR value. A decoder(620) selects an LLR of a certain value which is high from generated LLR values. The decodes calculates the difference between highest LLR value and a rest LLR value, uses a message vector, and performs LDPC decoding.