Patent ID: 7187907
Filing Date: 2007-03-06
Classification: H04B,H04L

Abstract:
1. A 2-way terminus device, based on adaptive filtering, for connecting both a signal source and a signal receiver to an end of a cable or wire channel for simultaneous transmission and reception of data signals in the same frequency band in said cable or wire channel, comprising: (a) a signal source and a first isolation amplifier, and an adaptive filter whose input is connected to said signal source through said first isolation amplifier, (b) a difference amplifier, and a connection between the output of said adaptive filter and the negative input of said difference amplifier, (c) a connection between said cable or wire channel and the positive input of said difference amplifier, connected to an output terminal to provide a connection to said signal receiver, the output of said difference amplifier, being the received signal, (d) a connection between the output of said difference amplifier and the error signal input of said adaptive filter, (e) a connection between the output of said first isolation amplifier and a small signal delay unit Δ whose output provides an input to a second isolation amplifier, said second isolation amplifier having the capability for signal amplification while driving a low impedance load, said delay unit having delay ranging from zero to the time duration of the impulse response of said adaptive filter, (f) a connection between the output of said second isolation amplifier and a first terminal of an impedance whose impedance value is equal to the characteristic impedance of said cable or wire channel, (g) a connection between the second terminal of said impedance and the said cable or wire channel, thus providing a two-way signal connection between said 2-way terminus device and said cable or wire channel, and (h) an adaptive algorithm stored in and implemented by said adaptive filter for the purpose of minimization of the mean square of said error.