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Nonlinear Distortion Analysis of 2.4GHz Power Amplifier for IEEE 802.11g OFDM Wireless LAN  

Oh Chung Gyun (Dept. of Electronics Engineering, University of Incheon)
Choi Jae Hong (Dept. of Electronics Engineering, University of Incheon)
Koo Kyung Heon (Dept. of Electronics Engineering, University of Incheon)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.3, 2005 , pp. 39-44 More about this Journal
Abstract
The OFDM modulation and transmission block have been modeled in order to analyse the relationship between the 2.4GHz power amplifier distortion and output ACPR for the IEEE 802.11g wireless LAN. The nonlinear characteristic of the power amplifier has been modeled as AM-to-AM and AM-to-PM using the behavioral model, and the output spectrum is analysed with the phase distortion variation. Also, amplifier back-off value from P1dB to satisfy the required IEEE 802.11g standard spectrum mask s been simulated with modeled phase distortion, and the simulation data have been compared to the measured result by using the pre-distortion technique.
Keywords
IEEE 802.11g; frequency regrowth; OFDM; back-off; distortion; ACPR; LUT;
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