Linear feedback sequence detection with error correction

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

H - Electricity

04

L

340/74

H04L 1/00 (2006.01) H03M 13/33 (2006.01) H04L 7/04 (2006.01)

Patent

CA 1268833

METHOD AND APPARATUS FOR LINEAR FEEDBACK SEQUENCE DETECTION WITH ERROR CORRECTION Abstract of the Disclosure A detector (200) locates a shift register sequence (408) within a digital data stream by correlating the data stream with a sequence (356) generated locally from a portion of the data stream. Error correction circuitry (100) estimates errors that may have corrupted the sequence during transmission across a noisy channel (416) and corrects them to the extent possible. The data stream and local sequence are correlated during an interval that is shifted either ahead (336) or behind (336') the portion of the error-corrected data stream (304) used to initialize the local sequence generator (302), 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.

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