METHOD OF SYNCHRONISING THE PSEUDO-RANDOM BINARY SEQUENCE IN A DESCRAMBLER

摘要

In a data communication system a signal is coded with n-bit codewords, where n is an integer. The codewords are convert-ed to a serial bit-stream and scrambled using a PRBS (pseudo-random binary sequence) from a PRBS generator (4). The PRBSsequence has a length n x m where m is an integer. At a receiver the serial data is descrambled using a corresponding binary se-quence from a PRBS generator (5) matched to that in the transmitter. The descrambled data is decoded in a decoder (6) in syn-chronism with the binary seqUence in the generator (5) thereby maintaining word alignment between the transmitter and the re-ceiver.