Power Allocation for Reducing PAPR of Artificial-Noise-Aided Secure Communication System

Figure 3

AM/AM conversion for SSPA model, where and denote the normalized practical and ideal amplified curves, respectively, the square with black color denotes the amplitude of input signal for each antenna, the square with red color denotes the saturation point of HPA, and the square with green color denotes the average amplitude of multiple antennas after input signal back-off. (a) AN-aided signal with EPA strategy in [47]. (b) AN-aided signal with angle rotation based technique in [44]. (c) AN-aided signal with proposed PA strategy.

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(b)

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