Accession Number : ADD015425

Title :   Retiming Decoder/Encoder.

Descriptive Note : Patent, Filed 18 Jul 90, patented 30 Jun 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Tash, Harvey ; Reed, Robert

Report Date : 30 Jun 1992

Pagination or Media Count : 18

Abstract : An apparatus is disclosed for retiming and decoding Manchester-encoded data to produce a locally-formatted waveform, and for encoding a locally-formatted waveform in a Manchester-encoded for-mat. The apparatus includes an all-digital retimer which retimes the Manchester-encoded waveform while monitoring the waveform to detect the presence of a data frame therein. The retimer detects the data frame by identifying a synch bit which initiates a frame and detecting when a maximum intraframe signaling distance has been exceeded. A decoder receives the retimed waveform, together with an envelope signal defining the data frame and decodes the retimed waveform into a locally-coded formal. The encoder receives a locally-formatted signal together with a signal defining a data frame and encodes the locally-formatted signal into a framed Manchester-encoded signal.

Descriptors :   *CODERS, *DECODERS, *FRAMES, *PATENTS, *TIMING CIRCUITS, CODING, DECODING, MATS, MONITORING, SIGNALS, WAVEFORMS, CLOCKS

Subject Categories : Command, Control and Communications Systems
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE