Abstract
Orthogonal Frequency Division Multiplexing (OFDM) transmission is an effective way to deal with multipath, being its implementation less complex than traditional equalizers. OFDM is characterized by the efficient of implementation because using fast Fourier transform (FFT) algorithm which made it ideal for new technology. It also features that it sensitive to nonlinear distortions due to its high peak to average power ratio values. OFDM system performance is affected by nonlinear characteristics of the high power nonlinear amplifier, where nonlinear amplification of OFDM signal caused by the Nonlinearities of the power amplifier. In this paper, the effect of feedforward linearization technique on high power amplifier nonlinearity for the OFDM system is studied. The feedforward linearization technique is a renowned linearization method to reduce out-of-band distortion of power amplifier. Computer simulations of the OFDM system show the OFDM signal measurements such as OFDM spectrum with and without linearization technique. Bit error rate (BER) also has been calculated and then compared to different modulation techniques with and without the presence of the of feedforward linearization technique.
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