Patent ID: 6983047

Claim:
A bit pump having a transmit path and a receive path, comprising: a precoder, coupled to said transmit path, to precondition a transmit signal propagating along said transmit path; a modulator, coupled to said precoder, to reduce a noise associated with said transmit signal; an analog-to-digital converter, coupled to said receive path, to convert a receive signal received at said bit pump into a digital format; a decimator, coupled to said analog-to-digital converter, to downsample said receive signal propagating along said receive path; and an echo canceling system, coupled between said transmit and receive path, to attenuate an echo in said receive signal, including: a slave echo canceling stage to employ a filter coefficient to attenuate said echo, a separation circuit, coupled to said slave echo canceling stage, to generate data representing a residual echo substantially exclusive of said receive signal, and a master echo canceling stage, coupled to said separation circuit, to receive said data and modify said filter coefficient based thereon.