Patent ID: 6373887
Filing Date: 2002-04-16
Classification: H04J,H04L,Y02D

Abstract:
A system for receiving an incoming data stream and generating a sequence of data frames to be transmitted using a modulated signal, the system comprising:a clock source for providing a first clock signal having a first clock frequency; a modulation circuit adapted to receive said first clock signal; a framing circuit adapted to receive said incoming data stream, said framing circuit being configured or designed to provide a plurality of data frames to said modulation circuit, each of the plurality of data frames including at least one payload portion and at least one frame overhead portion, the framing circuit further providing a receiver overhead signal for indicating an insertion of frame overhead bits into a data frame; and a clocking circuit adapted to receive said first clock signal and said receiver overhead signal, and further adapted to provide a second clock signal to said framing circuit, said clocking circuit being configured or designed to logically combine said first clock signal and said receiver overhead signal to generate said second clock signal, wherein said generated second clock signal has a specific timing relationship to said first clock signal and said receiver overhead signal such that while said receiver overhead signal is inactive, said second clock signal is active at a frequency substantially equal to said first clock frequency, and while said receiver overhead signal is active, said second clock signal is inactive.