Band insertion and precancellation technique for simultaneous communications of analog frequency-modulated and digitally modulated signals

摘要: In a system for simulcasting digitally modulated and analog FM signals over the same frequency band, effect of signal on in simulcast is calculated canceled from latter before its transmission. As result, digital transmission free interference signal. Moreover, achieved by adaptively inserting time varying number carriers data into band. The are selected frame to control their with accordance invention, predetermined order, preferred embodiment grouped contiguously one another rate information required identify inserted receiver advantageously low.