Patent ID: 7782979

Claim:
A BDPD-based (Base-band Digital Pre-Distortion) method for improving efficiency of an RF power amplifier, comprising: (1) Determining structural parameters of a neural network as required and establishing the neural network, inputting modeling data and initial values of network parameters required for establishing a neural network model of the RF power amplifier; (2) Propagating forward with the input data and network parameters, calculating the difference between an output value of the neural network and an expected output value, then propagating backward along the neural network with said difference to correct the network parameters; (3) Determining whether said difference meets a specified criterion; if so, outputting the neural network model of the RF power amplifier and going to step (4), otherwise inputting the corrected network parameters to the neural network and going to step (2); (4) Solving a pre-distortion algorithm of the RF power amplifier with said neural network model; (5) Carrying out pre-distortion processing for input signal of the RF power amplifier with said pre-distortion algorithm and then feeding them to the RF power amplifier; wherein said modeling data comprises: output signal Y(KT), input signal, and delay items of input signal of the power amplifier.