Patent ID: 7280603

Claim:
A digital subscriber line (DSL) receiver, comprising: means for a discrete multitone (DMT) receiver circuit operative to receive a DSL signal and to generate signal samples corresponding to respective frequency division multiplexed tones of the DSL signal; and means for a synchronization circuit operative to determine phase information for a crosstalk source indication signal carried by one of the plurality of frequency-division multiplexed tones from the signal samples generated by the DMT receiver circuit and to determine frame timing for the DSL signal responsive to the determined phase information; wherein the DMT receiver circuit comprises: a buffer that operative to receive and store samples of the DSL signal; and a fast Fourier transformer (FFT) operative to generate the signal samples for the respective ones of the plurality of frequency-division multiplexed tones from the stored samples of the DSL signal; wherein the means for a synchronization circuit are operative to control transfer of stored samples of the DSL signal from the buffer to the FFT responsive to the determined phase information; wherein the DMT receiver circuit comprises a serial-to-parallel converter that converts stored samples of the DSL signal from a serial data stream to a parallel data stream, and that provides the parallel data stream to the FFT.