DIGITAL TRANSMISSION SYSTEM WITH AN IMPROVED DECODER IN THE RECEIVER

摘要

The invention concerns a digital transmission system, in particular a mobile radio telephone system with at least one transmitter (10) for transmitting code words (CW) which can be recovered from a digital signal (s(k)), and with at least one receiver (20) which receives the code words to be received (CW'); the receiver (20) is provided with a decoder (24) with a predictive filter (22) which is excited by an input signal (et(k)) and determines an estimated digital signal (s(k)). In order to improve transmission of the digital signal when there is interference, it is proposed that the decoder (24) should be provided with a first set of means (26) for cutting off the input signal (et(k)) of the predictive filter (22) on receiving a distorted code word (CW') and a second set of switching means (31) for switching in substitution values (se(k)) for the estimated digital signal (s(k)) when the input signal (et(k)) is switched off, said substitution values being formed from values of the estimated digital signal (s(k)) which have a time lag.