Modeling of OFDM Systems With Memory Polynomial Power Amplifiers

C. Alexandre R. Fernandes, João C. M. Mota, Gérard Favier

DOI: 10.14209/sbrt.2011.110

Evento: XXIX Simpósio Brasileiro de Telecomunicações (SBrT2011)

Keywords: Keywords—OFDM power amplifier nonlinear polynomial memory polynomial

Abstract

Nonlinear power amplifiers (PA) are often modeled as a memoryless polynomial. However, when the input signal bandwidth is large, PA memory effects can not be ignored. The memory polynomial model is a simple but efficient model that captures both memory effects and nonlinear behavior of a PA. In this work, a new theoretical result concerning orthogonal frequency division multiplexing (OFDM) systems with a memory polynomial PA is demonstrated. It states that such an OFDM system can be expressed as a OFDM system with a memoryless polynomial PA whose coefficients vary from one subcarrier to another.

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