Time Division Multiplexing
Definition
Time Division Multiplexing (TDM) is a digital multiplexing technique where multiple signals are combined by allocating different time slots to each signal, allowing them to share the same transmission medium.
Detailed Explanation
Working Principle
- Divides channel time into fixed-length time slots
- Each input signal assigned specific time slots
- Signals transmitted in rapid succession
- Requires synchronization between sender and receiver
Types of TDM
-
Synchronous TDM
- Fixed time slots for each channel
- Regular pattern repeats
- May waste bandwidth if channel idle
-
Statistical TDM
- Dynamic allocation of time slots
- Better bandwidth utilization
- More complex implementation
Applications
- Digital telephone systems
- Mobile communications
- Computer networks
- Digital broadcasting
Technical Considerations
- Timing accuracy critical
- Buffer management important
- Synchronization required
- Frame structure design
- Error detection/correction needed