Patent ID: 7075998
Filing Date: 2006-07-11
Classification: H04L

Abstract:
1. A multi-tone X-DSL communication device with a plurality of shared and discrete components forming a transmit path and a receive path configured to couple to a communication medium to communicate multi-tone modulated communication channels, and the multi-tone X-DSL communication device comprising: a Walsh encoder on the transmit path and the Walsh encoder configured to encode with a first Walsh codeword successive symbols of a transmitted communication channel signal; an inverse Fourier transform component on the transmit path coupled to the Walsh encoder to transform encoded symbols of the transmitted communication channel signal from the frequency domain to the time domain for transmission over the communication medium to an opposing communication device on a common set of tones; a Fourier transform component on the receive path, and the Fourier transform component configured to receive from the opposing communication device on the common set of tones a communication channel signal encoded by the opposing communication device with a second Walsh codeword orthogonal to the first Walsh codeword and to transform the received communication channel signal from the time domain to the frequency domain; and a Walsh decoder on the receive path, and the Walsh decoder coupled to the Fourier transform component and configured to decode a with the second Walsh codeword the received communication channel signal transformed by the Fourier transform component, whereby the common set of tones of the transmitted and received communication channel signals span a shared frequency range on the communication medium.