How multiple signal transmitted on the same transmission channel?

Multiple signals can be transmitted over the same transmission channel using techniques such as Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), and Code Division Multiple Access (CDMA). TDM allocates different time slots to each signal, while FDM assigns different frequency bands to each signal. CDMA uses unique codes for each signal, allowing them to occupy the same frequency band simultaneously without interference. These methods enhance the efficiency of channel utilization and increase the capacity of communication systems.