Thomas, Kayden, Horstemeyer & Risley
System and method for echo cancellation over asymmetric spectra
The present invention generally relates to echo cancellation over an asymmetric transmission and receiving spectra. An apparatus is provided having a transmit path and a receive path, with an adaptive echo canceler disposed therebetween, for communicating data within a first bandwidth and a second bandwidth respectively. A first decimator is disposed between the transmit path and the echo canceler circuit and filters an incoming signal having a first sampling rate and emits a signal output at a second, reduced sampling rate. A second decimator is disposed along said receive path and filters an incoming signal and emits a signal output at a reduced sampling rate. An adder is disposed to subtract the output of the adaptive echo canceler from output of the second decimator to generate a received signal that is substantially free of echo.
GlobespanVirata, Inc.
H H
H04L H04B
inventional inventional
Wenye Ehud Xueming Weimin
Yang Langberg Lin Liu