Earth station capable of carrying out communication without a co

Earth station capable of carrying out communication without a co

Earth station capable of effectively using a frequency band of a

Easy detection of head position of information data via receptio

Echo canceler

Echo canceler having adaptive digital filter unit associated wit

Echo canceler having simplified calculation circuits

Echo canceler with subband attenuation and noise injection contr

Echo cancellation in multi-frequency differentially encoded digi

Echo cancellation in two-wire, two-way data transmission systems

Echo cancellation system and method

Echo canceller

Echo canceller

Echo canceller

Echo canceller

Echo canceller

Echo canceller

Echo canceller

Echo canceller for a variable-phase echo signal

Echo canceller for bidirectional digital transmission