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.