Abstract:
Techniques for wireless signal quality indicator are described. According to various implementations, various attributes of a wireless signal are detected. Attributes of the wireless signal are processed to ascertain a quality of the wireless signal. Based on an ascertained signal quality, indicia of the signal quality can be exposed.
Abstract:
본 발명의 일 실시예에 따른 방송 신호 수신 장치는 방송 신호들을 수신하는 수신부, 상기 수신한 방송 신호들을 OFDM (Orthogonal Frequency Division Multiplex) 방식으로 디모듈레이팅하는 디모듈레이터, 상기 디모듈레이팅된 방송 신호들로부터 적어도 하나 이상의 신호 프레임을 파싱(parsing)하는 신호 프레임 파서로서, 상기 신호 프레임은 복수의 피지컬 경로(physical path)들에 대응하는 서비스 데이터를 포함하고, 상기 서비스 데이터를 TI (Time Interleaving) 블록 단위로 타임 디인터리빙하는 타임 디인터리버 및 상기 타임 디인터리빙된 서비스 데이터를 디코딩하는 디코더를 포함할 수 있다.
Abstract:
A method and system to reduce a probability of incorrect interruption of an uplink transmission of a wireless device are disclosed. According to one aspect, decoding of a sequence of bits obtained from a signal received by the wireless device is performed without knowing whether the sequence corresponds to one of a grant for uplink transmission and noise. Decoding of the sequence of bits is performed to determine a probability metric associated with a first m bits of the sequence, where m is an integer greater than 1. The probability metric is compared to a threshold. The received signal is interpreted as having a grant sequence if the probability metric is greater than the threshold. The received signal is interpreted as noise if the probability metric is not greater than the threshold.
Abstract:
본 발명의 일 실시예에 따른 무선 통신 시스템의 수신단이 순방향 에러 정정을 위해 LDPC 코드를 디코딩하는 방법은, 수신 패킷들이 맵핑된 수신 노드들 및 상기 수신 노드들과 에지들을 통해 연결된 복원 노드들로 이분화된 노드들을 포함하는 이분 그래프(bipartite graph)에서, 제1 패킷 전달 경로의 에지들을 이용하여 상기 복원 노드들에 대응하는 제1 복원 패킷들을 획득하는 단계; 상기 제1 복원 패킷들에서 에러가 검출되면, 상기 수신 패킷들에서 제외될 에러 패킷의 후보를 결정하는 단계; 및 상기 결정된 에러 패킷의 후보가 제외된 상기 이분 그래프로부터 제2 복원 패킷들을 획득하는 단계를 포함하고, 상기 제2 복원 패킷들을 획득하는 단계는, 상기 에러 패킷의 후보가 맵핑된 수신 노드의 에지를 제외하는 제2 패킷 전달 경로의 에지들을 통해 상기 제2 복원 패킷들을 획득한다.
Abstract:
Procédé de réception de trames de données dans lequel on détermine une trame de référence par décisions fermes sur la valeur de chaque bit reçu et on procède à une vérification de la trame de référence suivant un codage de contrôle d'intégrité utilisé pour la transmission. Selon l'invention : - on calcule, pour chaque bit de ladite trame de référence, une valeur de vraisemblance représentative de la probabilité d'erreur de transmission; et, en cas d'incompatibilité avec ledit codage de contrôle d'intégrité : - on identifie dans ladite trame de référence un ensemble fini non vide de bits les plus vraisemblablement erronés en fonction desdites valeurs de vraisemblance; - on énumère des trames candidates correspondant chacune respectivement à l'une des combinaisons possibles de nombre d'inversions des bits les plus vraisemblablement erronés identifiés; - on vérifie la compatibilité des trames candidates énumérées avec ledit codage de contrôle d'intégrité.
Abstract:
The present disclosure concerns radio communication. More particularly, the disclosure relates to encoding/decoding. A method is performed by a receiver (300) for decoding data from a message which is received from a transmitter (100). The receiver (300) is generally configured to use a decoding matrix in the decoding. Furthermore, the message is typically split into a pre-defined number of sub-messages. The receiver (300) receives data packets from the transmitter (100), wherein the received data packets are formed according to a certain structure. Furthermore, the receiver (300) decodes the received data packets as the data packets are received and the decoding is performed sequentially with the arrival (i.e. reception) of the data packets. Hereby it is made possible to reduce, and thus improve, the latency.
Abstract:
An optical transport system is configured to use a modulation scheme in which a phase rotation applied to a sequence of PSK or QAM constellation symbols encoding a codeword of an FEC code produces a modified sequence of PSK or QAM constellation symbols encoding a bit- word that is not a valid codeword of that FEC code. Based on this property of the modulation scheme, an optical receiver may be configured to relatively accurately recover the absolute phase of the optical carrier wave of the received modulated optical signal by applying maximum likelihood sequence estimation processing to each portion of the signal carrying a valid codeword of the FEC code. For example, for a modulation scheme employing a 2n-PSK constellation, the optical receiver may be able to recover the absolute phase of the optical carrier wave with an accuracy that is better than 360/2" degrees.
Abstract:
Disclosed is an optical transceiver. The optical transceiver includes a decoder for decoding an 8B10B line-coded signal, a data mapper for separating the decoded signal into block units and securing extra memory capacity by mapping a data code and a block information code onto each of the separated blocks, and an FEC encoding unit for creating a Forward Error Correction (FEC) data and mapping the FEC data onto the extra memory capacity.
Abstract:
L'invention concerne un procédé de codage de paquets de données numériques. Ledit procédé comprend, pour N paquets d'entrée, la génération de (N+K- 1 ) premiers paquets codés et de (N+K 2 ) seconds paquets codés, les premiers paquets codés étant obtenus par une première convolution associée à un premier polynôme générateur G 1 différent de 1, et de degré K- 1 , et les deuxièmes paquets codés étant obtenus par une deuxième convolution associée à un deuxième polynôme générateur G2 différent de 1, et de degré K 2 , lesdits polynômes générateurs étant premiers entre eux. L'invention concerne également un procédé de correction d'effacements, comprenant une première phase de recouvrement de paquets codés effacés, et une seconde phase de décodage des paquets codés non-effacés ou recouvrés. non-effacés ou recouvrés.