A communication network having a first broadband communications channel or transmitting bus and a second broadband communications channel or receiving bus, wherein the first broadband communications channel is for passing information upstream to a head end and the second broadband communications channel...http://www.google.fr/patents/US5088111?utm_source=gb-gplus-shareBrevet US5088111 - Modulation and demodulation system employing AM-PSK and FSK for communication system using digital signals
Modulation and demodulation system employing AM-PSK and FSK for ...
