Method and system for implementing a reduced complexity dual rate echo canceller

A method for implementing a dual rate echo canceller for applications with asymmetric transmit and receive rates, the method comprising the steps of:

• receiving a transmit signal from a transmit path at an input;
• generating an output signal comprising a signal component representative of an echo signal associated with the transmit signal at an output, wherein the input and the output of the echo canceller filter are sampled at a transmit rate;
• receiving the output signal;
• generating a first output, the first output being subtracted from an incoming receive signal yielding a residue echo signal at a receive rate;
• receiving the residue echo signal;
• and
• generating an error signal at the transmit rate.

A method for implementing a dual rate echo canceller for applications with asymmetric transmit and receive rates, the method comprising the steps of:

• receiving a transmit signal from a transmit path;
• generating an output signal at a receive rate;
• receiving the output signal;
• and
• generating an echo signal representative of an echo associated with the transmit signal at an output, wherein the echo signal is subtracted from an incoming receive signal for generating an error signal at the receive rate.