1984-10-10
1987-06-23
Fleming, Michael R.
Excavating
371 43, G06F 1110
Patent
active
046758712
ABSTRACT:
A Viterbi decoder is provided with synchronization error detector which detects synchronization errors by monitoring the growth of the path metric associated with a state having itself as a predecessor and to indicate synchronization errors independently of the behavior of metrics associated with other states. The difference between the integral of the selected metric over a certain period of time and the sum of the absolute values of the input encoded data signal is determined and compared to a threshold to indicate whether or not a synchronization error exists.
REFERENCES:
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patent: 4527279 (1985-07-01), Yasuda
patent: 4536878 (1985-08-01), Rattlingourd
patent: 4545054 (1985-10-01), Davis
Gordon John
King Graham
Beausolieu, Jr. Robert W.
Fleming Michael R.
Signal Processors Limited
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