Multi-input multi-output (MIMO) terminal and radio-frequency emission method thereof

Abstract

The invention provides a multi-input multi-output (MIMO) terminal and a radio-frequency emission method thereof. The terminal comprises a first antenna, a radio-frequency emission module and a predistortion treatment module, wherein the radio-frequency emission module comprises a power amplifier which is connected with the first antenna and used for carrying out digital-to-analogue conversion and modulation on an input signal and power amplification on a modulated signal through the power amplifier and emitting the amplified signal through the first antenna; the predistortion treatment module is connected with the input end of the radio-frequency emission module and used for acquiring a predistortion coefficient corresponding to the output power of the power amplifier from a preset predistortion coefficient lookup table before the input signal is input to the radio-frequency emission module when the power amplifier works in a nonlinear area and carrying out predistortion treatment on the input signal according to the acquired predistortion coefficient. The power amplifier in the radio-frequency emission module of the MIMO terminal has improved linear performance and can meet the requirement on high power amplifier linearity of the LTE.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a Multiple-Input Multiple-Output (Multiple-Input Multiple-Output, MIMO) terminal and a radio frequency transmitting method thereof. Background technique [0002] In the field of mobile communications, the 3GPP Long Term Evolution (LTE) technology has received widespread attention because it represents the direction of the subsequent evolution of 3G. LTE's support for variable channel bandwidth requires the power amplifier to achieve high linearity in a wider frequency band, and the application of OFDM technology in LTE will also greatly improve the peak-to-average ratio of the entire system, all of which put forward higher requirements for the linearity of the amplifier. requirements. In addition, modulation methods such as 64QAM used in LTE also have high requirements on the linearity of the system. From the above analysis, we can find that it is very meaningful to ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-input multi-output terminal and its radio frequency transmission method to solve the technical problem of using pre-distortion technology in mobile terminals to improve the linear performance of the system

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