Method for generating efficient linear digital radio frequency power signal based on polar coordinate processing

Abstract

The invention discloses a method for generating an efficient linear digital radio frequency power signal based on polar coordinate processing. The method comprises the following steps: an orthogonal vector expression mode of a radio frequency signal is converted to a polar coordinate vector expression mode; the level components and phase components of the polar coordinate vector are respectively processed in the digital domain, the processed level component signal drives a level component tracking switch power supply to carry out level control, and the phase components are subjected to digital phase modulation and up-conversion to generate a modulated carrier frequency signal; the carrier frequency signal drives the radio frequency switch power circuit through pulse shaping, the output voltage of the level component tracking switch power supply controls the output level of the radio frequency power circuit, and the radio frequency power signal that meets the requirements is finally output through the filtration of a harmonic suppression filter; and both the level component tracking power supply and the radio frequency power switch circuit work in a pulse switching state. According to the technical scheme of the invention, the high efficiency of the radio frequency linear power amplifying circuit can be achieved.

Description

technical field [0001] The invention relates to a method for generating an efficient linear digital radio frequency power signal, in particular to a method for generating an efficient linear digital radio frequency power signal based on polar coordinate processing. Background technique [0002] Radio frequency power amplifier (RFPA, radio frequency power amplifier) ​​is the most important energy-consuming device and nonlinear device in radio communication equipment. Improving the efficiency of RF power amplifiers is one of the most direct ways to reduce power consumption and volume in wireless communication systems. However, usually high-efficiency RF power amplifiers usually have strong nonlinearity, which will cause signal distortion within the signal bandwidth and spectrum leakage outside the signal bandwidth. [0003] As the miniaturization of radio communication equipment is increasingly required, it is required to reduce the power consumption of the radio frequency po...

AI Technical Summary

Problems solved by technology

At present, the efficiency of conventional RF linear power amplifiers only reaches about 30%.

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