ALIGNMENT DETECTION BY FULL AND PARTIAL FEC DECODING

• Main Authors: Gunn, Joshua D, Hemphill, Edwin J, Hinton, Ryan W
• Format: Patent
• Language: English; French; German
• Published: 31.05.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A forward error correction (FEC) decoder is configured to find an alignment of a code block in a data stream by attempting to fully or partially decode one or more data windows of a predetermined size in the data stream. The predetermined size is a size of each codeword. The FEC decoder selects a first data window of the predetermined size, attempts to decode the first data window based on a particular error control coding method, and determines whether a valid codeword can be identified by attempting to decode the first data window. In response to determining that a valid codeword can be identified, the FEC decoder determines that an alignment of the codeword with the first data window is found. Otherwise, the FEC decoder selects a second data window of the predetermined size and attempts to decode the second data window.