Process for synchronization in the downstream of multiple...

Details Process for synchronization in the downstream of multiple... Process for synchronization in the downstream of multiple...

2003-11-20

2008-09-09

Ngo, Ricky (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S503000, C375S260000

Reexamination Certificate

active

07423959

ABSTRACT:
The system in this invention is applicable to bi-directional communication over the electricity network between a head-end and a plurality of users, and permits the synchronization in time and frequency of multiple users in a multi-carrier OFDM communication system. It is characterized in that it consists of the generation of synchronization sequences by means of two identical synchronization symbols, periodically transmitted in the downstream, from the head-end to the users to estimate and correct the sampling frequency and simultaneously estimate the moment in which each OFDM symbol commences.

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patent: 6628735 (2003-09-01), Belotserkovsky et al.
patent: 6647025 (2003-11-01), Sudo
patent: 6876675 (2005-04-01), Jones et al.
patent: 6985432 (2006-01-01), Hadad
patent: 0798903 (1997-10-01), None
patent: WO 00/77961 (2000-12-01), None
patent: WO 01/28146 (2001-04-01), None

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