A nonlinear compensation method and an optical carrier wireless communication system

A technology of wireless communication over light and nonlinear compensation, which is applied in the field of communication, can solve the problems of affecting system performance, failure of nonlinear compensation, and deterioration of system linearization effect, so as to improve system performance and realize linearization effect

Active Publication Date: 2019-06-07
HUAWEI TECH CO LTD
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Problems solved by technology

As a result, when the digital pre-distortion processing unit performs digital pre-distortion processing on the downlink (PA and downlink ROF fiber), it cannot obtain the real nonlinear characteristics of the downlink, so that the nonlinear compensation cannot be performed correctly
This leads to poor linearization of the system and affects system performance.

Method used

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  • A nonlinear compensation method and an optical carrier wireless communication system
  • A nonlinear compensation method and an optical carrier wireless communication system
  • A nonlinear compensation method and an optical carrier wireless communication system

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Embodiment Construction

[0045] The technical solution in this application will be described below with reference to the accompanying drawings.

[0046] In the wireless communication system, the ROF system is a new type of wireless transmitter architecture. The ROF wireless transmitter architecture is a new type of wireless transmitter architecture. After the destination, the optical signal is converted into the same analog signal to achieve the purpose of directly transmitting the analog signal.

[0047] In a traditional wireless transmitter architecture, the RRU includes a radio frequency analog signal circuit, and a circuit for converting an analog signal to a digital signal. In the traditional wireless transmitter architecture, RRU includes uplink (link from antenna to baseband) and downlink (link from baseband to antenna), where the remote interconnection method of uplink is: uplink The circuit first converts the RF analog signal into a digital signal, and then transmits the digital signal to th...

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Abstract

The invention provides a nonlinear compensation method and an ROF system. The method comprises the steps that an RRU obtains a first input training signal; The RRU inputs the first input training signal into a feedback link; The DPD processing unit obtains a first output training signal output from the feedback link; The DPD processing unit determines nonlinear characteristics of the feedback linkaccording to the first input training signal and the first output training signal; And the DPD processing unit performs nonlinear compensation on the feedback link according to the nonlinear characteristic of the feedback link. According to the non-linear compensation method provided by the embodiment of the invention, the non-linear characteristic of the feedback link in the ROF wireless transmitter can be obtained in advance, and the non-linear characteristic of the feedback link is compensated in advance. And then, the real nonlinear characteristic of the downlink can be obtained, so thatthe real nonlinear characteristic of the downlink can be compensated in advance, the linearization of the ROF system is realized, and the system performance can be improved.

Description

technical field [0001] This application relates to the field of communications, and more specifically, to a method of nonlinear compensation and a wireless communication system over optical Background technique [0002] In the wireless communication system, radio over fiber (ROF) is a new type of wireless transmitter architecture (system), and the ROF wireless transmitter architecture (which can be called "ROF" system) is a new type of wireless transmitter The architecture is to convert the analog signal into an optical signal first, then transmit it remotely through the optical fiber, and then convert the optical signal into the same analog signal after reaching the destination, so as to achieve the purpose of directly transmitting the analog signal. [0003] In the traditional wireless transmitter architecture, the remote radio unit (Remote Radio Unit, RRU) converts the baseband optical signal into a radio frequency signal at the remote end, amplifies and transmits it. Th...

Claims

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Application Information

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IPC IPC(8): H04B10/2543H04B10/2575
CPCH04B10/2543H04B10/2575
Inventor 韦前华包红强程琪韩冬张慧剑
Owner HUAWEI TECH CO LTD
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