摘要:
Embodiments of the present invention provide a decoding apparatus and method. The method includes: obtaining a to-be-decoded group; detecting whether all code words in the to-be-decoded group meet that a checksum is 0; performing a sign bit decision on the to-be-decoded group when all the code words in the to-be-decoded group meet that a checksum is 0; detecting, when all the code words in the to-be-decoded group do not meet that a checksum is 0, whether the sign bit decision has been performed on each code word in the to-be-decoded group; performing, when there is at least one code word on which the sign bit decision has been performed in the to-be-decoded group, data restoration on each code word on which the sign bit decision has been performed; and constructing a new to-be-decoded group by using each code word obtained after the data restoration and each code word on which the sign bit decision has not been performed, to perform FEC decoding. When all the code words in the to-be-decoded group meet that a checksum is 0, FEC decoding is not performed, and only the sign bit decision is performed. That is, in a process of performing multiple times of decoding on each code word, FEC decoding is not always performed every time. This reduces power consumption required by FEC decoding.
摘要:
A receiver circuit for extracting data (DAT) from a serial data signal (SDI) is described. The serial data signal (SDI) contains a data packet having a first or a second data packet format based on a selection signal (AS), wherein the first data packet format has a first number of bits (PRE, P1, DAT, P2, A1, P3, A2) and the second data packet format (PRE, P1, DAT, P2, A1, P3, A2, P4, A3) has a second number of bits, wherein the second data packet format comprises the bits of the first data packet format (PRE, P1, DAT, P2, A1, P3, A2) followed by one or more additional bits (P4, A3). The receiver circuit comprises one or more shift registers (REG) having a total number of bits being equal or greater than the number of bits of the second data packet format. The receiver circuit comprises also a switching circuit (200) configured to selectively connect the serial data signal (SDI) to one of the serial inputs of the one or more shift registers (REG) as a function of the selection signal (AS). In particular, when the first data packet format has been selected and once having received the respective bits, the bits of the first data packet format are stored in given positions of the one or more shift registers (REG). The switching circuit (200) ensures moreover that, when the second data packet format has been selected and once having received the respective bits, the bits of the first data packet format included at the beginning of the second data packet format are stored in the same given positions of the one or more shift registers (REG).
摘要:
An attenuation amount corresponding to each wavelength at OADM node is optimized according to a calculation result in a network management system (NMS), so that an optical signal level diagram according to traffic volume variations is set, the level diagram allows each of optical signal quality indexes at terminal nodes for all wavelengths to be maintained at a required threshold value or more, and allows an optical signal quality index of a specific wavelength to be improved. Then, an FEC circuit in an optical receiver corresponding to the specific wavelength is turned OFF or the error correction ability is lowered, whereby power consumption of an overall optical network is efficiently reduced.
摘要:
A technique for determining whether a paging channel signal comprising one or more data units is an empty page signal as disclosed. In a method aspect, the technique involves the steps of receiving a first data unit of a paging channel signal, obtaining an empty-paging data unit of the paging channel signal as a reference data unit, correlating the reference data unit with the received first data unit, and determining whether the paging channel signal is an empty page signal based on a first correlation result. In another aspect, an apparatus for determining whether a paging channel signal comprising one or more data units is an empty page signal as disclosed. The apparatus comprises a receiving component adapted to receive a first data unit of a paging channel signal, a coding component adapted to obtain an empty-paging data unit of the paging channel signal as a reference data unit, a correlator adapted to correlate the reference data unit with the received first data unit to obtain a first correlation result, and a determinator adapted to determine whether the paging channel signal is an empty page signal based on the first correlation result.
摘要:
A circuit and a method are used estimate quality of the output of a wireless receiver. This quality measure is used to control the supply voltage and thereby provide power savings.
摘要:
The invention relates to a participant station (10; 30; 50) for a bus system (1; 2) and to a method for increasing the data rate of a bus system (1; 2). The participant station (10; 30; 50; 60) comprises a device (15) for receiving a message (41, 42, 43) from at least one other participant station of the bus system (1; 2) via the bus system (1; 2). In the bus system (1; 2), an exclusive collision-free access of a participant station (10, 20, 30, 50) to a bus line (40) of the bus system (1; 2) is ensured at least temporarily. The participant station also comprises a testing device (12) for testing whether or not the received message (41; 42; 43) is specified for the participant station (10; 30; 50) and an error processing device (14) for processing errors of the received message (41; 42; 23) only when the test carried out by the testing device (12) indicates that the received message (41; 42; 43) is specified for the participant station (10; 30; 50).
摘要:
A networking device includes a packet header protect generator, a transmitter, a receiver, a decoder and router. The transmitter transmits a data packet to the receiver. The data packet includes a data packet header. The packet header protection generator is arranged to toggle selected bits of a protected portion of the data packet header and generate a data integrity signature. The receiver receives the data packet and generates a received data integrity signature. The decoder computes a locally computed data integrity signature in response to the protected portion of the received data packet header. The locally computed data integrity signature is compared with the received data integrity signature. The router selects a portion of a routing path in response to whether a data packet forwarding destination includes a decoder arranged to compute a locally computed data integrity signature.
摘要:
Techniques to increase the capacity of a W-CDMA wireless communications system. In an exemplary embodiment, early termination of one or more transport channels on a W-CDMA wireless communications link is provided. In particular, early decoding is performed on slots as they are received over the air, and techniques are described for signaling acknowledgment messages (ACK's) for one or more transport channels correctly decoded to terminate the transmission of those transport channels. The techniques may be applied to the transmission of voice signals using the adaptive multi-rate (AMR) codec. Further exemplary embodiments describe aspects to reduce the transmission power and rate of power control commands sent over the air, as well as aspects for applying tail-biting convolutional codes in the system.