Patent ID: 6553066
Filing Date: 2003-04-22
Classification: H04L

Abstract:
An error compensation arrangement for compensating in a multi-carrier receiver a time error between a receiver sample clock of said multi-carrier receiver and a transmitter sample clock of a multi-carrier transmitter communicating with said multi-carrier receiver, said time error compensation arrangement comprising:a time error input terminal adapted to receive a time error signal indicative of said time error; a signal input terminal adapted to receive samples of a transferred signal, said samples being produced under control of said receiver sample clock; a digital time correction filter, operative in time domain, having an input terminal coupled to said signal input terminal and a control input terminal coupled to said time error input terminal and having filter coefficients suitably adapted to transform subsets of said samples into first time corrected samples of said transferred signal, wherein said time error comprises a first linearly incrementing contribution and a second contribution, and said filter coefficients are suitably adapted to compensate for said first linearly incrementing contribution; and phase rotation means, operative in frequency domain, for rotating the phase of carriers in said transferred signal in proportion to their respective frequencies to thereby compensate for said second contribution.