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Linear transmission method based on plurality of antennae

A transmission method and linearization technology, applied in radio transmission systems, diversity/multi-antenna systems, transmission systems, etc., can solve problems that are not easy to implement, require high branch consistency, affect the quality of wireless communication, and achieve high efficiency , the effect of reducing the requirement of linearity

Inactive Publication Date: 2016-11-09
CHENGDU UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing power amplifier linearization technology has high requirements for the branch consistency of the power amplifier, which is not easy to realize in engineering practice, thus affecting the quality of wireless communication

Method used

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  • Linear transmission method based on plurality of antennae
  • Linear transmission method based on plurality of antennae
  • Linear transmission method based on plurality of antennae

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Embodiment

[0036] Taking the dual-antenna transceiver as an example, such as figure 1 As shown, at the signal sending end, the broadband signal x(t) to be sent needs to be decomposed first, and the broadband modulation signal with a non-constant envelope is decomposed into two constant-envelope signals, and the two signals after signal decomposition are passed through After the two power amplifiers are transmitted from the two antennas respectively, since the decomposed signal is a constant envelope signal, the requirements for the linearity of the RF power amplifier are greatly reduced, and the RF power amplifier can work at the maximum power output point (close to the saturation state). achieve very high efficiency.

[0037] At the receiving end, the constant-envelope signals received by the two antennas can be synthesized to obtain the broadband modulation signal at the sending end by adopting the reverse process of the sending end.

[0038] figure 2 shows that the modulation signa...

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Abstract

The invention relates to a wireless communication technology, aims to solve the problem of influence on wireless communication quality since an existing power amplifier linearization technology has a relatively high requirement on branch consistency of a power amplifier and is difficult to implement in engineering practice, and provides a linear transmission method based on a plurality of antennae. The method comprises the following steps that: a transmitting end performs signal decomposition on a broadband modulation signal to be transmitted, decomposes a broadband modulation signal of a non-constant envelope into a plurality of paths of constant envelope signals, performs power amplification on the paths of constant envelope signals respectively, and transmits amplified signals corresponding to transmitting antennae respectively; and a receiving end receives the paths of constant envelope signals through a plurality of paths of receiving antennae respectively, performs power amplification on the paths of constant envelope signals, and performs linear synthesis on the amplified paths of constant envelope signals, wherein the number of the receiving antennae is the same as the number of the transmitting antennae. The method is suitable for a wireless communication system.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to the application of a power amplifier linearization technology based on multi-antenna and constant envelope decomposition in wireless communication. Background technique [0002] Modern wireless communication systems are developing in the direction of high speed, wide band, and intelligence, and the frequency band resources are becoming more and more tight. In order to accommodate more communication channels within a limited spectrum range and improve spectrum utilization, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) and MIMO (Multi- Input&Multi-Output, multiple input multiple output) and other key technologies. Among them, the MIMO multi-antenna technology enables signals to be transmitted and received through multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. It can make f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/42H04B7/04
CPCH04W52/42H04B7/0413
Inventor 蔡顺燕庹先国杨建波
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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