Orthogonal Frequency Division Multiplexing (OFDM) is a promising
technique for recent and future wireless communication systems
mainly due to its high spectral efficiency and inherent capacity to
combat Inter Symbol Interference (ISI). However it suffers from
nonlinear error problem, popularly known as high Peak to Average
Power Ratio (PAPR) due to nonlinear transfer function of Power
Amplifiers in Transmitters. It causes severe performance
degradation to the systems that employ link adaptation for
achieving better efficiency such as LTE and WiMAX. Therefore it is
important to understand the nature and impact of the error. This
book will discuss basics of OFDM and provide an in depth
understanding of the nonlinear error and its impact of link
adaptive OFDM systems. It also provides detail simulation results
and analysis of its impact on the system for different channel
condition, modulation and FEC coding rate. Finally a compensation
technique will be introduced to overcome the impact of nonlinear
errors.
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