A communication system for exchanging digital signals over a transmission link has at least one terminal that simultaneously applies an analog signal corresponding to a first digital stream to the link and converts an analog signal from the link into a second digital stream. The analog signal received...http://www.google.fr/patents/US4999830?utm_source=gb-gplus-shareBrevet US4999830 - Communication system analog-to-digital converter using echo information to improve resolution
Communication system analog-to-digital converter using echo information to ...
