Digital pre-distortion processing method and device

Abstract

The invention discloses a digital pre-distortion processing method and a digital pre-distortion processing device. The method comprises the following steps of: carrying out digital pre-distortion processing on baseband signals according to a pre-distortion correction parameter, converting the baseband signals subjected to digital pre-distortion processing into radio-frequency signals, carrying out shunting on the radio-frequency signals, and respectively outputting each route of radio-frequency signals to different power amplifiers; coupling and outputting the radio frequency signals outputted by each route of power amplifiers to a feedback link to carry out combining so as to obtain a combined signal, and carrying out conversion processing on the combined signal; and generating a pre-distortion correction parameter according to the combined signal subjected to conversion processing and the baseband signals before performed digital pre-distortion processing, and updating the pre-distortion correction parameter. Aiming at a single-channel multi-power amplifier system, the invention provides the digital pre-distortion processing method and the digital pre-distortion processing device applied to the single-channel multi-power amplifier system, so that the link complexity is reduced, the link cost and resources are saved, and the digital pre-distortion efficiency is improved.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to a digital predistortion processing method and device. Background technique [0002] With the development of mobile communication technology, the users and business volume of mobile communication are increasing sharply, and spectrum resources are becoming more and more scarce. In order to improve the utilization rate of spectrum, high-efficiency modulation methods are generally used, so the requirements for power amplifiers used in base stations It is getting higher and higher. When the power amplifier meets the requirements of linearity, it is required to improve the efficiency of the power amplifier and reduce its power consumption. Therefore, the problem of power amplifier distortion cannot be solved by backing off the power. Among the many existing power amplifier linearization technologies, digital predistortion has attracted wide attention in the industry due to its ...

AI Technical Summary

Problems solved by technology

[0008] However, sharing one feedback channel and one digital pre-distortion training device, adopting the training mode of rotation training switching, as the number of channels increases, the training speed will slow down, the cycle period will become longer, and the correction efficiency is not high enough to meet the requirements of real-time correction , and a digital predistorter per channel will require more and more resources

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