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Characterization of power spectral density for nonlinearly amplified OFDM signals based on cross correlation coefficient

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Figure

Figure 1 The AM-AM and AM-PM characteristics of PA models used in this work. The reference envelope level Amax is chosen as 1.0
Figure 2a,b shows the relationship between C20 logn/ξ and γdBin the case of soft envelope limiter model and erf model,respectively, where the IBO here is defined as γdB≜10 γ
Figure 2 Correlation vs. input backoff.(a) The relationship between higher-order nonlinear distortion components Cn/ξ and input backoff for soft envelope limiter model and (b) the erf model.
Figure 3. It is observed that with increasing n, the in-bandcomponent steadily decreases and thus the sidelobe powerincreases accordingly.
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