Accession Number : ADD000056

Title :   Frame Synchronization Detector.

Descriptive Note : Patent,


Personal Author(s) : Hoffman,Eric J ; Perschy,James A ; Elder,Benjamin M

Report Date : 16 Oct 1973

Pagination or Media Count : 7

Abstract : The patent relates to long strings of digital data which are preceded by a frame sync pattern or 'Barker' word. The Barker word is fixed and known to the receiver and the appearance of the Barker word enables the receiver to mark the beginning of a frame. The difficulty of detection of the sync pattern is compounded when the data has a bit error rate and when the sync word is transmitted amidst random data. Detecting the frame sync pattern is a problem of cross-correlation of the data stream with a stored replica of the Barker word sync pattern. This device is a detector for accurate frame sync detection using a minimum quantity of hardware and significantly simplifying frame sync pattern detectors.

Descriptors :   *Detectors, *Patents, Synchronization(Electronics), Data transmission systems, Digital systems, Detection, Shift registers

Subject Categories : Cybernetics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE