|Signals which are to be multiplexed are added in the time domain. But they occupy diff slots in the frequency. domain||The signals which are to be multiplexed can occupy the entire bandwidth but are isolated in the time domain|
|FDM is usually preferred for the analog signals.||TDM is preferred for the digital signals.|
|Synchronization is not required.||Synchronization required|
|The FDM requires a complex circuiting at the transmitter and receiver.||TDM circuiting is not very complex.|
|FDM suffers from the problem of crosstalk due to imperfect band filters.||In TDM the problem of crosstalk is not severe.|
|Due to wideband fading in transmission medium, all FDM channels are affected||Due to fading only a few TDM channels will be affected|
|Due to slow narrowband fading taking place in the transmission channel only a single channel may be affected in FDM||Due to slow narrow band fading all the TDM channels may get wiped out.|
- Multiplexing of digital signals.
- Digital telephony
- Fiber optic communication
- Satellite communication
- Wireless communication applications.
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