Detection of uncorrectable data blocks in coded communications systems

摘要

A method of evaluating the quality of received signals of a data flow comprising data blocks containing code words each including an original information part and a redundant part, formed at the transmitter by an encoder (ECE) from the original information part, wherein a quality signal (BE) indicating whether or not a block error is correctable, is produced. The receiver apparatus comprises an error correcting decoder (ECD) for detecting and correcting the errors in the code word received and a uncorrectable block-error detector (UBED) which includes an evaluation unit for examining whether the corrected data block contains a valid code word or not, and for producing a quality signal (BE). <IMAGE>