Patent ID: 6081567
Filing Date: 2000-06-27
Classification: H04J,H04L

Abstract:
A synchronization method for use in a data communication system having a first device configured to communicate with a second device over a communication network, said communication network introducing a number of digital impairments to a transmit signal such that said digital impairments arrive at said second device in a periodic manner based on a period of N symbols, said method comprising the steps of:transmitting a plurality of signal segments from said first device to said second device, each of said signal segments being represented by an integer multiple of N symbols;obtaining synchronization with symbols transmitted by said first device, said obtaining step being performed by said second device;determining a symbol position, relative to each of said signal segments where a digital impairment was introduced by said communication network, said determining step being responsive to said obtaining step; andderiving a compensating signal point constellation for use during subsequent encoding and decoding of signal points associated with said symbol position, said deriving step being performed by said second device.