Media New media New comments Search media. Blogs New entries New comments Blog list Search blogs. Groups Search groups. Log in Register. Search only containers. Search titles only. Search Advanced search…. New posts. Search forums. Log in. Install the app. Contact us. At the receiver, the signals are surpassed by band-pass filters to isolate the individual frequency channels. At last, the output of the band-pass filter is demodulated and distributed at the different destination.
FDM is implemented only in the case when the usable bandwidth of the channel is greater than the needed channel bandwidth. The channels are separated with each other by unused bandwidth called as guard bands to prevent the inter-channel crosstalk and overlapping of the channel. OFDM Orthogonal Frequency Division Multiplexing is a spread spectrum technique which divides the data over a large number of carrier separately located at precise frequencies.
The spacing between these carrier provides the orthogonality feature to assist the demodulator for detecting the correct frequencies. However, the subchannels are closely spaced and overlap each other. Prior understanding orthogonality feature, we must clear out the meaning of the orthogonal , which means more than one object is acting independently. Therefore, in OFDM the neighbour signals do not interfere with each other. So, how does orthogonality works? What is the equation for heat transfer?
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