Channel Estimation in OFDM-Review Paper

sumit jangra

Abstract


In OFDM, the sub-carriers are orthogonal to each other. It avoids the interference between the sub-channels and hence no need of guard bands. Therefore the design of both the transmitter and receiver becomes easy, Unlike conventional FDM, a separate filter is not necessary for each sub-channel. The orthogonality also allows high spectral efficiency. But OFDM requires accurate frequency synchronization between the receiver and the transmitter. This paper describes the basic introduction of OFDM system and explains the different channel estimation algorithms.


Keywords


Orthogonal frequency division multiplexing, Channel Estimation

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