System and method for frequency modulation in a modem

摘要

The invention provides a method for transmitting information across a communication channel, comprising the steps of:
extracting, from a two-directional information flow signal at the side of a first subscriber, information transmitted by the first subscriber;modulating said extracted information with a carrier frequency f1 for providing a frequency modulated (FM) information signal;mixing said frequency modulated (FM) information signal into said two-directional information flow signal in said communication channel;extracting at the side of a second subscriber from the two-directional information flow signal the transmitted frequency modulated (FM) information signal;demodulating said transmitted extracted frequency modulated (FM) information signal for providing the information as transmitted by the first subscriber;mixing the information into the two-directional information at the side of the second subscriber.