A SYSTEM FOR IMPROVED RETURN PATH PERFORMANCE FOR DIGITAL COMMUNICATION SIGNALS

摘要

An HFC return path system for digital communication signals using a sampled RF word interface to headend demodulators, provides higher performance equipmen t at an equivalent of lower cost and more flexible and efficient interfacing a nd traffic multiplexing. The return path signal from the fiber optic node to th e headend/hub is represented ones and zeroes, and the digital return receiver at the headend/hub includes an optical receiver for receiving the serial stream of optical ones and zeroes and converting the optical digital signal to an electrical digital signal, a deserializer for deserializing the serial strea m of digital words and synchronization information into parallel digital words , a digital filter for processing the deserialized digital words to interface digitally to an application receiver and a digital interface for interacting and forwarding the processed parallel digital words to the application receiver.