Compare between the features of FDM and TDM

FDM	TDM
(i) FDM stands for Frequency Division Multiplexing.	(i) TDM stands for Time Division Multiplexing.
(ii) The signals which are to be multiplexed are added in the time domain. But they occupy different slots in the frequency domain.	(ii) The signals which are to be multiplexed can occupy the entire bandwidth in the time domain.
(iii) FDM is usually preferred for the analog signals.	(iii) TDM is usually preferred for the digital signals.
(iv) Synchronization is not required.	(iv) Synchronization is required.
(v) The FDM requires a complex circuitry at Tx and Rx.	(v) TDM circuitry is not very complex.
(vi) FDM shares the frequency scale for the different signals.	(vi) TDM shares the time scale for the different signals.
(vii) FDM is less efficient technique than TDM.	(vii) The utilization of physical link in case of TDM is more efficient than in FDM.
(viii) FDM suffers from the problem of crosstalk due to imperfect BPF.	(viii) In TDM the problem of crosstalk is not severe.
(ix) Due to bandwidth fading in the Tx medium, all the FDM channels are affected.	(ix) Due to slow narrowband fading all the TDM channels may get wiped out.
(x) Due to slow narrowband fading taking place in the transmission channel may be affected in FDM.	(x) Due to slow narrowband fading all the TDM channels may get wiped out.