Patent ID: 8189457
Filing Date: 2012-05-29
Classification: H04B,H04L

Abstract:
1. A multi-tone modem comprising: a plurality of shared and discrete components forming a transmit path and a receive path configured to couple to a wired communication medium for at least intermittent communication of a plurality of frequency division multiplexed (FDMA) multi-tone modulated communication channels thereon; and a Fourier transform component to transform received multi-tone modulated communication channels between a time domain and a frequency domain and vice versa; and selected ones of the shared and discrete components on the receive path configured to determine alignments between the received multiplexed communication channels in the time domain using alignment determinations made in both a time domain portion of the receive path together with determinations made in a frequency domain portion of the receive path; and the Fourier transform component configured to transform a stream of digitized samples of the received multiplexed communication channels from the time to the frequency domain using the alignment determinations for each multiplexed communication channel determined by the selected ones of the shared and discrete components.