Method for adjusting predistortion factors and device thereof

Abstract

Embodiments of the present invention disclose a method for adjusting a pre-distortion coefficient, which includes: adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end; analyzing signal received quality reports which are obtained respectively according to the pre-distortion coefficients before adjustment and after adjustment and are fed back by a receiving end, to determine a variation situation of signal received quality of the receiving end; if the signal received quality becomes better, using the pre-distortion coefficient after adjustment as the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end, and then returning to the step of adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end; and if the signal received quality becomes worse, using the pre-distortion coefficient before adjustment as the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end. The embodiments of the present invention further disclose an apparatus for adjusting a pre-distortion coefficient. The present invention can be adopted to overcome problems that a pre-distortion effect is affected by temperature and PA aging when an open-loop pre-distortion coefficient is adopted, and that a high cost is caused when a closed-loop pre-distortion coefficient is adopted.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and device for adjusting a predistortion coefficient. Background technique [0002] In wireless communication, the nonlinear problem of PA (Power Amplifier, power amplifier) ​​restricts the maximum transmission power and efficiency of PA; in order to maximize the transmission power and efficiency of PA, pre-distortion technology can be used to offset the nonlinearity of PA. So that the PA can work in the non-linear amplification area to improve the transmit power and efficiency of the PA; pre-distortion technology refers to pre-distorting the signal before the signal is input to the PA to obtain a distorted signal. When the distorted signal passes through the PA When , it will offset the nonlinearity of the PA, realize the linearization of the PA, and improve the transmit power and efficiency of the PA. [0003] In the pre-distortion technology, the pre-distortion co...

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Problems solved by technology

[0006] The technical problem to be solved by the embodiments of the present invention is to provide a pre-distortion coefficient adjustment method and device, which can overcome the influence of temperature and PA aging on the pre-distortion effect when the open-loop pre-distortion coefficient is used, and the influence of the closed-loop pre-distortion coefficient when the closed-loop pre-distortion coefficient is used. , resulting in high cost

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