METHOD AND DEVICE FOR SIGNAL RECEPTION INFLUENCED BY INTERSYMBOL INTERFERENCE

摘要

PROBLEM TO BE SOLVED: To provide a method for receiving a signal affected by inter-sumbol interference, especially a signal which is encoded and modulated by a TCM system. SOLUTION: A receiver containing two viterbi decoders 1 and 2 which are cascade-connected is used for receiving a TCM modulation signal. The first decoder 1 operates in accordance with software output viterbi algorithm SOVA and the output contains rigid decision on a reliable degree paraffieter and a transmission symbol. The output of the first decoder 1 which substantially considers the storage effect of a channel is generally sent to the second viterbi decoder 2 executing actual decision after the operation of an inverse interleaving operation by comparing the influence of inter-symbol interference. The method and the device are suitable for a digital communication system such as a micro wave radio link.