Impact of nonlinear power amplifier on link adaptation algorithm of OFDM systems

Das, S. S.; Tariq, F.; Rahman, M. I.; Frederiksen, F. B.; Carvalho, E. D. and Prasad, R. (2007). Impact of nonlinear power amplifier on link adaptation algorithm of OFDM systems. In: Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th, Sep . 30 2007 - Oct . 3 2007, Baltimore, MD.

DOI: https://doi.org/10.1109/VETECF.2007.279

Abstract

The impact of non linear distortion due to High Power Amplifier (HPA) on the performance of Link Adaptation
(LA) - Orthogonal Frequency Division Multiplexing (OFDM) based wireless system is analyzed. The performance of both Forward Error Control Coding (FEC) en-coded and uncoded system is evaluated. LA maximizes the throughput while maintaining a required Block Error Rate (BLER). It is found that when OFDM signal, which has high PAPR, suffers non linear distortion due to non ideal HPA, the LA fails to meet the target BLER. Detailed analysis of the distortion and effects on LA are presented in this work.

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