Unique word detector and method for detecting a unique word with

Details Unique word detector and method for detecting a unique word with Unique word detector and method for detecting a unique word with

1995-06-07

1996-06-04

Chin, Stephen

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

375363, H04L 700, H04L 2706

Patent

active

055241271

ABSTRACT:
A unique word detector for use in detecting a unique word received by a demodulator in one of a plurality of windows offset in time is provided. The unique word detector includes a correlator for receiving successive sequences of binary data related to one of the windows. The correlator compares each of the successive sequences with the unique word to generate a measure of correlation between the sequences of binary data and the unique word. The unique word detector also includes a window detector interfaced with the correlator for comparing each of the measures of correlation to a predetermined threshold to determine whether the unique word has been received. A method of detecting the unique word in one of the windows is also provided. According to the method a predetermined number of successive measures of correlation are accumulated to form a first cumulative correlation value related to one window and the same number of successive measures of correlation are accumulated relating to a later window to form a second cumulative correlation. The first and second cumulative correlation values are compared to each other to identify in which of the plurality of windows the unique word has been detected.

REFERENCES:
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patent: 4232197 (1980-11-01), Acampora et al.
patent: 4587662 (1986-05-01), Langewellpott
patent: 5140619 (1992-08-01), Aubie et al.
patent: 5376894 (1994-12-01), Petranovich
patent: 5406586 (1995-04-01), Wang

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