A digital predistortion system and method thereof

Abstract

The invention discloses a digital pre-distortion system, including: user equipment and a base station; the invention also discloses a digital pre-distortion method applied to the digital pre-distortion system, including the following steps: 1. The user equipment prepares to communicate with the base station equipment , establish a communication connection through the handshake protocol, and judge whether to enable the DPD mode. If the transmission signal power of the user equipment is too small, it will not be enabled, and enter step 5, otherwise, enter step 2; 2. The user equipment sends high-power signals regularly. The training signal is sent to the base station equipment; 3. After receiving the training signal, the base station equipment calculates the pre-distortion coefficient, and then sends it to the user equipment through the base station transmission link; 4. After the user equipment receives the pre-distortion coefficient through the receiving link, it transmits it to the pre-distortion unit Use, then return to step 2 until the communication between the user equipment and the base station ends; 5. Turn off the pre-distortion module and communicate normally. It has the advantages of improving the efficiency of the user terminal, reducing power consumption, and the like.

Description

technical field [0001] The invention relates to a digital pre-distortion hardware realization technology, in particular to a digital pre-distortion system and method thereof. Background technique [0002] With the development of wireless communication, the bandwidth of the signal is getting wider and wider, and its envelope fluctuation and peak-to-average ratio are also getting bigger and bigger, which puts forward higher linearity requirements for the power amplifier. Semiconductor devices such as power amplifiers have inevitable nonlinear characteristics under large signals. When broadband transmitters work in the nonlinear region, serious intermodulation components will be generated, which can cause mutual interference between signals in the band. [0003] How to improve the linearity of the system is an important problem that the broadband system needs to solve. In order to solve the problem of linearity, three methods can be used: one is to select a suitable ultra-linea...

AI Technical Summary

Problems solved by technology

The problem with the hardware implementation architecture of the DPD is that for low-power wireless devices such as mobile phones, due to the use of feedback links and DSP and FPGA, the hardware cost of the device will increase, and the area of ​​the circuit board will increase. At the same time, this part of the circuit will also have A certain power consumption may offset the efficiency improvement brought by DPD

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