OFDM has been an attractive choice for digital modulation in the
recent years due to its robustness to channel fading and
invulnerability to intersymbol interference. However, to achieve an
optimal performance the corresponding channel estimation scheme
need to be accurate. This book focuses on the use of guard
intervals between successive OFDM symbols for channel estimation. A
hybrid of blind and semi-blind estimation techniques is proposed to
create an energy efficient scheme that can maintain accurate
channel estimation as well as a low transmission BER. Multipath
fading channel are considered for performance evaluation. The
proposed hybrid scheme is tested in static as well as time varying
channel environments using computer simulations. Simulation results
show that the proposed scheme outperforms the existing schemes on
the basis of BER performance for the same SNR.
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