FULL-DUPLEX FAST ESTIMATION OF ECHO AND CHANNEL RESPONSES IN THE PRESENCE OF FREQUENCY OFFSETS IN BOTH FAR ECHO AND FAR SIGNAL

In a previous publication, we proposed a full-duplex fast training pro cedure for simultaneously estimating echo and channel responses. It re duces the tap-setting time to half of that required by the traditional half-duplex fast training schemes. However, its estimation accuracy m ay be degraded by the frequency offsets in both far echo and far signa l that are caused by the analog carrier network. In this correspondenc e, we extend the previous work and develop a new algorithm that can co mpensate for the phase rotation components introduced by these frequen cy offsets. The performance of the new method is analyzed in terms of mean-square error. Simulation results are presented to confirm the ana lysis.