OFDM COMMUNICATION WITH COOPERATIVE RELAY
Cooperative
communications is a new paradigm shift for the fourth generation wireless
system that will
guarantee high data rates to all users in the network, and we anticipate
that it will be
the key technology aspect in the fifth generation wireless networks.
In terms of
research ascendance, cooperative communications can be seen as related to research
on relay channel and MIMO systems. Recently, cooperative diversity in wireless
network has received great interest and is regarded as promising technique to
mitigate multi-path fading, which results in a fluctuation in the amplitudes of
the received signal. The cooperative communications is a new communication
paradigm which generates independent path between the user and the base station
by introducing a relay channel. OFDM technology has been widely used due to its
spectral efficiency and inherent flexibility in allocating power and bit rate
over distinct subcarriers which are orthogonal to each other.
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