Abstract:
Signal deterioration in a communication channel is mainly due to
Multipath Fading. MIMO help for the best quality of signal and OFDM
for attaining lower bandwidth. Multiple Input Multiple Output (MIMO)
systems use more than one antenna at both ends of the communication
link.
Over the past decade, the use of MIMO system has rapidly gained
popularity due to its enhanced performance capabilities of improved
Reliability, Spatial Diversity Gain and Spatial Multiplexing Gain.
Orthogonal Frequency Division Multiplexing (OFDM) is one of the best
digital modulation schemes, where signal is divided into number of
narrow band signals to obtain spectrum efficiency and minimizing the
Inter Symbol Interference (ISI). Thus, combining MIMO and OFDM
technologies will improve spectral efficiency, Link reliability, spectral
gain and data rate.
The main aim of MIMO-OFDM systems is to combine OFDM
technology with the techniques of MIMO systems. The growing demand
of multimedia services and the growth of Internet related contents lead
to increasing interest to high speed communications. OFDM is a type of
multichannel modulation that divides a given channel into many parallel
sub channels or subcarriers, so that multiple symbols are sent in parallel.
