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ROF communication far-end machine and ROF system

A remote machine and near-end machine technology, applied in the transmission system, multiplex communication, electromagnetic wave transmission system, etc., can solve the problems of cumbersome switching process, unfavorable rapid changing market, and difficult market share of existing technologies.

Active Publication Date: 2020-01-07
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the TDD system has not been fully developed, there may be potential frequent module design replacements in the future, and in the ROF system, the switching process between various systems, frequency bands, and emission levels is still comparative. It is cumbersome, and the entire module needs to be redesigned. While consuming a lot of manpower, material resources and development costs, it is not conducive to the rapidly changing market, making it difficult for existing technologies to quickly occupy market share and cope with the competitive environment.

Method used

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  • ROF communication far-end machine and ROF system
  • ROF communication far-end machine and ROF system
  • ROF communication far-end machine and ROF system

Examples

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Embodiment 1

[0087] The embodiment of the present invention provides a ROF communication remote machine under the FDD system, such as figure 1 As shown, the ROF communication remote machine includes a first packaging module 101 and a second packaging module 102, wherein the first packaging module 101 includes a wavelength division multiplexer, and the first branch 103 and the first branch connected to the wavelength division multiplexer. The second branch 104, wherein the first branch 103 includes a laser PD1, the second branch 104 connected to the second packaging module is further divided into a feedback second branch and an uplink second branch, and the feedback second branch has the first A selection switch K1, the first switch K1 is connected to the first port 105 and the low-noise amplifier L1, the low-noise amplifier L1 is connected to the WDM through the detector LD1, the second upstream branch has a second selection switch K2, and the second switch K2 is connected to the first Two...

Embodiment 2

[0118] The embodiment of the present invention provides a ROF communication remote machine under the TDD system, such as figure 2 As shown, the ROF communication remote machine includes a first packaging module 201 and a second packaging module 202, wherein the first packaging module 201 includes a wavelength division multiplexer, and the first branch 203 and the first branch connected to the wavelength division multiplexer. The second branch 204, wherein the first branch 203 includes a laser PD1, the second branch 204 connected to the second packaging module is further divided into a feedback second branch and an uplink second branch, and the feedback second branch has the first A selection switch K1, the first switch K1 is connected to the first port 205 and the low-noise amplifier L1, the low-noise amplifier L1 is connected to the WDM through the detector LD1, the second upstream branch has a second selection switch K2, and the second switch K2 is connected to the first Tw...

Embodiment 3

[0137] This embodiment provides a ROF communication remote machine applied in the TDD system, including a first encapsulation module 701 and a second encapsulation module 702 . The first encapsulation module 701 does not include the second feedback branch to save cost.

[0138] Such as Figure 7 As shown, the ROF communication remote machine includes a first packaging module 701 and a second packaging module 702, wherein the first packaging module 701 includes a wavelength division multiplexer, and a first branch 703 and a first branch connected to the wavelength division multiplexer. The second branch 704, wherein the first branch 703 includes a laser PD1, the second branch 704 connected to the second packaging module includes the second upstream branch, the second branch includes the first port 705, the first port 705 Connect the first selection switch K1, the first switch K1 is connected to the second selection switch K2, the second uplink branch has the second selection s...

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Abstract

The invention provides an ROF communication far-end machine and an ROF system. The packaging structure comprises a first packaging module and a second packaging module, the first packaging module comprises a wavelength division multiplexer, and a first branch and a second branch which are connected with the wavelength division multiplexer. The first branch is used for receiving a downlink opticalsignal from the near-end machine by the wavelength division multiplexer; the second branch is connected with the second packaging module through the first port and the second port; the signal is converted into a downlink electric signal and sent to the second packaging module; wherein the first packaging module is used for receiving a feedback downlink electric signal, converting the feedback downlink electric signal into a downlink optical signal, sending the downlink optical signal to the near-end machine, receiving an uplink electric signal sent by the second port and sending the uplink electric signal to the near-end machine, and the second packaging module is used for amplifying the power of the downlink electric signal, filtering, transmitting and feeding back to the first port through the antenna, receiving the uplink electric signal and sending to the second port. When different systems, frequency bands and transmitting power levels need to be replaced, redesign and redevelopment are not needed, the market share occupied by the product can be rapidly deduced, and the method has the first-sending advantage in competition.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an ROF communication remote machine and an ROF system. Background technique [0002] In a ROF (radio over fiber, radio over fiber) communication system, the last stage in the remote unit is usually a power amplifier tube, which is used to amplify the signal to a specified power level, and then radiate to a specified area through the antenna. The ROF technology involves modulating microwaves onto lasers, the modulated light waves propagate through optical links, and finally are received and demodulated by the base station, and the demodulated microwaves are radiated by the antenna. In order to amplify the signal without distortion, it is necessary to linearize the power amplifier tube. [0003] The most common linearization techniques for power amplifier tubes in the prior art are analog pre-distortion technology and DPD (digital pre-distortion, digital pre-distort...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2575
CPCH04B10/2575H04B10/25754H04J14/0272H04J14/0282H04B10/25752H04Q11/0005
Inventor 钟伟东伍尚坤李洋洋范莉
Owner COMBA TELECOM SYST CHINA LTD