Patent ID: 6928124
Filing Date: 2005-08-09
Classification: H04J,H04L

Abstract:
1. A method for detecting a periodic binary signature in a binary signal, the method including steps of: providing the binary signal being a succession of binary symbols transmitted at a predetermined bit rate; providing the periodic binary signature being in the form of a pre-selected binary code having a code length of “C” binary symbols spread over the signal with a spacing of “D” bits both between the binary symbols of the signature, and between each two adjacent signatures; providing a state machine comprising a logical scheme interconnected with a memory block, providing the memory block of said state machine to comprise “D” independent memory cells each having its serial number, for cyclically connecting thereof to the logical scheme; ensuring that each of the memory cells, when in conjunction with the logical scheme, is capable of registering “K” successive binary states of the state machine including an initial state and a terminal state and comprising “C” successive binary states respectively associated with “C” binary symbols of the signature appearing in their predetermined order in said signature; assigning one and the same of an initial binary state to all the cells in the memory block; applying said binary signal, at the predetermined bit rate, to the state machine, synchronously with said bit rate, switching the logical scheme of the state machine to D memory cells in a cyclical order for processing each bit within any group of D successive bits of the binary signal by a particular cell of the D memory cells; thereby associating each particular memory cell in the memory block with a respective bit in any group of D successive bits of the signal; continuously checking whether one or more of said “D” memory cells have registered the terminal state, and if in the affirmative, selecting a single memory cell considered as detecting said signature, wherein: