Abstract
Many physical devices, such as power amplifiers, are intrinsically nonlinear and thus introduce nonlinear distortions. Transmission systems with a peak power (or peak amplitude) constraint are considered here. To address the tradeoff between maximizing the output power efficiency and minimizing the signal distortion, we consider two criteria: signal-to-noise-and-distortion ratio and symbol-error-rate. For multipath fading channels, we show that a soft limiter with a particular gain offers an optimal solution when the peak amplitude constraint is imposed at the transmitter. Numerical examples are provided to illustrate the concepts.
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