Method for reducing PAPR (Peak to Average Power Ratio) based on combination of adjustable factor amplitude limiting filtering and digital pre-distortion

The invention discloses a method for reducing PAPR (peak-to-average power ratio) based on combination of adjustable factor amplitude limiting filtering and digital pre-distortion, and belongs to the technical field of OFDM (orthogonal frequency division multiplexing) system peak-to-average power ratio in the communication field. The invention aims to solve the problem of high PAPR (Peak to Average Power Ratio) of the existing orthogonal frequency division multiplexing system in a signal transmission process. Comprising the following steps: at a signal transmitting end of an OFDM transmission system, carrying out adjustable amplitude limiting operation in a preset range on a time domain signal after inverse fast Fourier transform of a corresponding information bit stream to obtain an amplitude-limited time domain signal; carrying out low-pass filtering and delaying to obtain a delayed signal; calculating a feedback signal of the power amplifier and an ideal signal through an adaptive algorithm to obtain an amp