Nonlinearity Compensation for High Power Amplifiers Based on Look-Up Table Method for OFDM Transmitters

Provided by: Helvetic Editions
Topic: Mobility
Format: PDF
The OFDM is generally known as an effective technique for high bit-rate applications. In OFDM systems, the combination of different signals with different phase and amplitude give a large dynamic range that is used to be characterized by a high PAPR. To obtain maximum efficiency power amplifier should be driven near the saturation region, but since the OFDM signal has high PAPR, this power amplifier will cross over to the nonlinear region causing serious in band distortion, and operation in nonlinear mode reduces performances of the output signal.

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