Nonlinear Effect Analysis under Different Signal Modulations Based on Adaptive DPD Verification

Different signal modulation modes have different effects on communication system performance, and specific signal modulation methods are required in different scenarios. In this paper, an adaptive digital predistortion (DPD) architecture is established based on computer aided design (CAD) platform to evaluate the influence of different signal modulation methods on the nonlinearity of power amplifiers (PAs). By observing the frequency spectrum of the receiving baseband signal and the Adjacent Channel Power Ratio (ACPR) before DPD and after DPD under different modulation modes are compared. It can help the design of communication systems to minimize interference to adjacent channels while ensuring transmission rates.