Preamble recognition and synchronization detection in partial-re

Details Preamble recognition and synchronization detection in partial-re Preamble recognition and synchronization detection in partial-re

1992-03-09

1993-11-09

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375116, 371 46, H03D 100, H04L 2706

Patent

active

052609766

ABSTRACT:
A method and apparatus for detection of a timing data sequence and an end-of-preamble (EOP) flag based on a maximum-likelihood (ML) test performed on received data timing samples after synchronization has been achieved is described. The preamble preceding transmitted user data consists of a timing sequence followed by a known sequence of bits marking its end. After detection of synchronization, the receipt of the timing data sequence is recognized when an ML test detects no more than n.sub.V violations during a sequence of n.sub.l received samples. Similarly, the receipt of the EOP flag is recognized as soon as n.sub.F violations an ML test have occurred in the received sample sequence after recognition of the timing data sequence.

REFERENCES:
patent: 5012491 (1991-04-01), Iwasaki
patent: 5050191 (1991-09-01), No
patent: 5146475 (1992-09-01), Kubo

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