Digital pre-distortion system and method for dual-band analog multi-beam millimeter wave transmitter

Abstract

The invention discloses a digital pre-distortion system of a dual-band analog multi-beam millimeter wave transmitter. The system comprises a dual-band multi-beam digital pre-distortion module, a transmitting link, an amplifier, an analog beam forming network, a dual-band digital pre-distortion parameter extraction module and a multi-beam digital pre-distortion parameter extraction module; the dual-band multi-beam digital pre-distortion module is composed of a multi-beam digital pre-distortion module and K dual-band digital pre-distortion modules; multi-beam crosstalk in the system can be effectively processed through multi-beam digital pre-distortion, and dual-band crosstalk and inherent nonlinearity of the power amplifier can be effectively processed through dual-band digital pre-distortion. The invention further discloses a pre-distortion method of the dual-band analog multi-beam millimeter wave transmitter. According to the invention, the problems of multi-beam crosstalk, dual-bandcrosstalk and nonlinearity of the power amplifier can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of millimeter wave digital predistortion, in particular to a digital predistortion system and method for a dual-band analog multi-beam millimeter wave transmitter. Background technique [0002] With the popularity of smart terminals and the increasing demand for communication data rates, 5G communication systems have begun to be commercially deployed and become a research hotspot. At the same time, people began to explore the concept of 6G. To be sure, the 6G vision requires massive connections, reliability, real-time and throughput requirements simultaneously. In this case, single-band narrowband can no longer meet the demand, and multi-band parallelism is an inevitable trend to improve spectral efficiency. In order to improve the system capacity and stability of the 5G mmWave communication system and the 6G terahertz communication system, a large number of MIMO systems are required. There are currently ...

AI Technical Summary

Problems solved by technology

Different from the traditional scenario, the digital predistortion system of the dual-band analog multi-beam mmWave transmitter faces more challenges: firstly, the power amplifier is similar to the traditional system, which will produce nonlinear distortion and memory effect; secondly, due to the dual-band problem, the power amplifier will Introduces dual-frequency crosstalk distortion; finally, different beams in a multi-beam system will crosstalk in space

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