Differences between Time-division multiplexing (TDM), Frequency-division multiplexing (FDM), and statistical time division multiplexing (STDM)
Time-division multiplexing (TDM) is a method of transmitting multiple signals or data streams over a common communication channel by dividing the channel into different time slots. Each signal or data stream is allocated a specific time slot, and the signals are transmitted sequentially. TDM is commonly used in telecommunications and networking.
Frequency-division multiplexing (FDM) is a method of transmitting multiple signals or data streams over a common communication channel by dividing the channel into different frequency bands. Each signal or data stream is allocated a specific frequency band, and the signals are transmitted simultaneously. FDM is commonly used in radio and television broadcasting.
Statistical time division multiplexing (STDM) is a method of transmitting multiple signals or data streams over a common communication channel by dynamically allocating time slots based on the demand and traffic patterns. Unlike TDM, where each signal is allocated a fixed time slot, STDM adjusts the allocation of time slots based on the amount of data to be transmitted. This allows for more efficient utilization of the communication channel.
In summary, TDM divides the channel into time slots, FDM divides the channel into frequency bands, and STDM dynamically allocates time slots based on demand and traffic patterns.