Two or more data streams are assigned to discrete sub-carriers on an FM transmitter
Two or more signals are arranged to share discrete time slots of a data transmission✓Правильный ответ
Two or more data streams share the same channel by transmitting time of transmission as the sub-carrier
Two or more signals are quadrature modulated to increase bandwidth efficiency
Объяснение
Time division multiplexing gives each stream the whole channel, but only during its own recurring time slot, and the receiver reassembles the streams by tracking slot timing within a repeating frame. All streams therefore share one frequency instead of one moment in time.