Base band predistortion device and method

Abstract

The invention discloses a base band predistortion device and a base band predistortion method. The base band predistortion device comprises an address generator, a parameter determining unit, a phase translation unit, an amplitude translation unit, a phase basis look-up table look-up part, an amplitude basis look-up table look-up part, a phase curvature adjusting part and an amplitude curvature adjusting part; wherein, the address generator is used for calculating the addresses of an phase basis look-up table and an amplitude basis look-up table according to input signals; the parameter determining unit determines phase translation amount, amplitude translation amount, phase curvature adjusting amount and amplitude curvature adjusting amount according to the scalar information of feedback signals; the phase translation unit changes the addresses according to phase translation amount; the amplitude translation unit changes the addresses according to amplitude translation amount; the phase basis look-up table look-up part looks up the phase basis look-up table according to changed addresses to determine corresponding phase output; the amplitude basis look-up table look-up part looks up the amplitude basis look-up table according to the changed addresses to determine corresponding amplitude output; the phase curvature adjusting part adjusts the phase output according to the phase curvature adjusting amount; the amplitude curvature adjusting part adjusts the amplitude output according to the amplitude curvature adjusting amount.

Description

Technical field [0001] The present invention is related to the predistortion linearization technology of the nonlinear device, and more specifically, to the linearization of the power amplifier. Background technique [0002] Power amplifier (PA) is an important part of electronic equipment. It can amplify the power of weak electrical signals to meet the needs of transmission and emission. Among them, the energy used for amplification comes from a DC power supply. That is, the PA converts the DC energy into an AC signal, so that the power intensity of the AC signal meets the needs. Here the ability of the PA to convert DC energy into AC energy is called the efficiency of the PA. The power relationship between PA input and output signal can be divided into linear zone, nonlinear zone and saturation zone. [0003] When the envelope of the input signal fluctuates only in the linear region, the input signal is ideally amplified. When the envelope of the input signal fluctuates to th...

AI Technical Summary

Problems solved by technology

[0019] In general, generating predistortion data based on feature quantities requires relatively complex calculations.

Therefore, this method has the problem of large amount of calculation

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