Linear feedback sequence detection with error correction

Details Linear feedback sequence detection with error correction Linear feedback sequence detection with error correction

1986-09-03

1988-05-24

Fleming, Michael R.

Excavating

371 40, 371 42, 371 45, G06F 1110

Patent

active

047471050

ABSTRACT:
A detector locates a shift register sequence within a digital data stream by correlating the data stream with a sequence generated locally from a portion of the data stream. Error correction circuitry estimates errors that may have corrupted the sequence during transmission across a noisy channel and corrects them to the extent possible. The data stream and local sequence are correlated during an interval that is shifted either ahead or behind the portion of the error-corrected data stream used to initialize the local sequence generator, thereby avoiding the region during which short-term correlation between the data stream and local sequence would otherwise cause false indications of detection when only noise or random data is being received.

REFERENCES:
patent: 4404675 (1983-09-01), Kanchevski
patent: 4667327 (1987-05-01), Bright
patent: 4686690 (1987-08-01), Sato

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