Some of the comparisons of TDM vs FDM are highlighted below: Advantages: TDM is protected against crosstalk when compared to FDM systems.While FDM is mostly employed for analog signal Type of Signal: TDM can be used for transmission of both Analog as well as Digital signals.
Complexity: TDM system requires identical systems for various data streams which make the circuitry simple compared to FDM systems where different circuitry, bandpass filter, etc are required for data coming from different streams which makes the design of FDM system quite complex.In FDM guard band is used to separate two different signals and also to avoid overlapping. Requirement: Framing Bits (sync pulses)are used at the start of each signal so as to enable synchronization and also for the retrieval of information back during demultiplexing.Frequency Utilization: TDM total available bandwidth is used on a time-sharing basis whereas in FDM the entire frequency band that is available is divided into multiple channels where each channel is separated by a guard band which also leads to ineffective utilization of the frequency band.Basic Criteria: The time is divided into various different fixed length slots and each of the signals is allocated with a time slot on a round-robin basis whereas FDM generates a different channel for different signals and each of them occupies a different frequency band.
Whereas FDM is a process in which the total available bandwidth is divided into a series of non-overlapping frequency bands where each band carries a separate signal. Where each signal is divided into a fixed-length time slot. Definition: TDM is a process of transmitting multiple data streams over a single channel.Head to Head Comparison Between TDM and FDM (Infographics)īelow are the top 10 differences between TDM vs FDM:
It also helps us optimize the transmission cost for transmitting the information. It helps in effective communication of the information present in either Analog or digital form over a given channel. Multiplexing is a mode of transportation of the signal in a network.
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