4results about "Burst error correction" patented technology

Techniques for an optical receiver are disclosed. The optical receiver may include an optical digital signal processing (ODSP) device. The ODSP device may include: a photodiode operable to convert an optical signal into an electrical signal; a digital signal processor operable to generate a digital signal based on the electrical signal; a quantization component operable to generate a quantized output signal based on the digital signal; and a processing device. The processing device is operable to: measure one or more signal statistics of the digital signal; and identifying one or more quantization thresholds, wherein the one or more quantization thresholds are calculated based on the one or more signal statistics.

Described herein are systems, methods, and other techniques for performing forward error correction in a communication system. A set of data blocks to be transmitted over a wireless channel are received. Rows of a flexible matrix are formed using the set of data blocks based on arrival times of the set of data blocks, each of the rows corresponding to a different time window. A set of random parity blocks are computed by performing row-wise parity operations on the flexible matrix. A set of burst parity blocks are computed by performing column-wise parity operations on the flexible matrix in accordance with a burst parity computation scheme. The set of data blocks, the set of random parity blocks, and the set of burst parity blocks are transmitted over the wireless channel to a receiver.

This application discloses an encoder, an encoding method, and a chip, relating to the field of encoding technologies. A feedback circuit in the encoder is designed to avoid timing convergence issues when the encoder operates in large-bandwidth and high-parallelism input scenarios. The encoder includes: a feedforward module, configured to receive to-be-encoded data with a parallelism of n symbols per cycle, and perform calculation in a finite field based on a symbol of the to-be-encoded data received in a current cycle, to obtain a single-cycle polynomial corresponding to the current cycle; and a feedback module, configured to receive the single-cycle polynomial corresponding to the current cycle output by the feedforward module, and perform calculation in the finite field based on the single-cycle polynomial corresponding to the current cycle and a first polynomial indicating a symbol received in a historical cycle, to obtain a second polynomial, where the second polynomial is used to determine a target polynomial indicating the to-be-encoded data, and the target polynomial is used to generate a check sequence of the to-be-encoded data, to obtain a codeword obtained by encoding the to-be-encoded data based on a forward error correction encoding scheme.

The application discloses an error capturing circuit and decoding method based on an asymmetric quantum cyclic burst error code. The error capturing circuit can quickly locate error positions by cyclically shifting error accompanying formula, and can correct any burst X error and Z error in the range of decoding length of codeword design. The decoding method based on the asymmetric quantum cyclic burst error code and the error capturing circuit can respectively correct Z error and X error, optimizes decoding performance, fully considers degenerate characteristics in decoding to fully exert the decoding limit of quantum coding theory, and realizes correction of more quantum burst errors under the same code rate.