Method and device for the reception of signals affected by inter-symbol interface
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United States of America Patent
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Oct 20, 1998
Grant Date -
N/A
app pub date -
Dec 26, 1995
filing date -
Feb 17, 1995
priority date (Note) -
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Abstract
For the reception of TCM modulated signals a receiver is used which comprises two cascaded Viterbi decoders. The first decoder operates according to a soft output Viterbi algorithm (SOVA), and its output comprises a hard decision on the transmitted symbols as well as a reliability parameter. The output of the first decoder, which is intended essentially to take into account the memory effects of the channel by contrasting the influence of inter-symbol interference, is fed, possibly after a de-interleaving action, to the second Viterbi decoder which carries out the actual decision. The preferred application is to digital communication systems such as microwave radio links.
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