WO2021056846A1 - 一种rof通信远端机及rof系统 - Google Patents

一种rof通信远端机及rof系统 Download PDF

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Publication number
WO2021056846A1
WO2021056846A1 PCT/CN2019/124691 CN2019124691W WO2021056846A1 WO 2021056846 A1 WO2021056846 A1 WO 2021056846A1 CN 2019124691 W CN2019124691 W CN 2019124691W WO 2021056846 A1 WO2021056846 A1 WO 2021056846A1
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WIPO (PCT)
Prior art keywords
port
electrical signal
branch
selection switch
downlink
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PCT/CN2019/124691
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English (en)
French (fr)
Inventor
钟伟东
伍尚坤
李洋洋
范莉
Original Assignee
京信通信系统（中国）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 京信通信系统（中国）有限公司 filed Critical 京信通信系统（中国）有限公司
Priority to EP19947311.7A priority Critical patent/EP4020845A4/en
Priority to US17/762,224 priority patent/US11909443B2/en
Publication of WO2021056846A1 publication Critical patent/WO2021056846A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
    • H04B10/25754—Star network topology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0272—Transmission of OAMP information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a ROF communication remote machine and ROF system.
  • the last stage in the remote unit is usually a power amplifier tube, which functions to amplify the signal to a specified power level, and then radiate it to a specified area through an antenna.
  • ROF technology includes modulating microwaves onto lasers, the modulated light waves are propagated through optical links, and finally received and demodulated by the base station, and the demodulated microwaves are radiated by the antenna.
  • the power amplifier tube needs to be linearized.
  • the feedback architecture adopted in the prior art is based on the idea of independent non-modular design modules for the feedback link and the uplink.
  • the FDD described uses two independent channels for downward and upward transmission of information respectively.
  • the described TDD is a technology for distinguishing wireless channels in time during the downlink operation of the frame period and continuing the uplink operation.
  • the TDD system has not yet achieved lower costs and lower costs.
  • the entire TDD or FDD remote module or the PCB of the TDD or FDD remote module needs to be redesigned. In the market environment that needs to quickly occupy the market to gain share, it has been difficult to be accepted by the market environment.
  • the prior art is aimed at the ROF system, which can effectively solve the problem of distortion during signal amplification, and the use of DPD technology can correct the nonlinearity of the power amplifier tube in real time.
  • the TDD standard has not been fully developed, there may be potential frequent module design replacements in the future, and in the ROF system, the process of switching between various standards, frequency bands, and emission levels is still compared. It is cumbersome and requires a redesign of the entire module, which consumes a lot of manpower, material resources and development costs, and is not conducive to a rapidly changing market, making it difficult for existing technologies to quickly occupy market share to respond to the competitive environment.
  • the feedback architecture currently used in the industry is based on the idea of independent design of the feedback link and the uplink. Although both FDD and TDD standards are taken into account, this method has not achieved the lowest cost and minimum cost under the TDD standard. If you need to change different standards, different frequency bands, and different transmit power levels, you need to redesign and re-develop the entire module. It takes a lot of manpower, material resources and time. Products have been launched quickly to occupy the market and gain market share. A fierce competitive environment.
  • the first aspect of the present application provides an ROF communication remote machine, including a first packaging module and a second packaging module;
  • the first package module includes a wavelength division multiplexer, a first branch and a second branch connected to the wavelength division multiplexer, and the second branch communicates with the second branch through the first port and the second port.
  • Package module connection where:
  • the first branch is used to convert the downlink optical signal received by the wavelength division multiplexer from the near-end machine into a downlink electrical signal and send it to the second packaging module;
  • the second branch is used to receive the downlink electrical signal fed back by the first port and convert it into a downlink optical signal, then send it to the near-end machine via the wavelength division multiplexer, and receive the second port After the sent uplink electrical signal is converted into an uplink optical signal, it is sent to the near-end machine through the wavelength division multiplexer;
  • the second package module is used to amplify the power of the downlink electrical signal, transmit it through the antenna and feed it back to the first port after filtering, and receive the uplink electrical signal through the antenna, and send it to the second port after filtering and power amplification.
  • the second aspect of the present application provides a ROF system with digital predistortion, and the ROF system with digital predistortion includes:
  • the near-end machine is used to modulate and convert the downstream signal into a downstream optical signal by the laser and send it to the ROF communication remote machine; and to receive the feedback signal and/or the uplink signal sent by the ROF communication remote machine.
  • the detector converts into an optical signal and sends it to the baseband unit through frequency conversion and demodulation;
  • the ROF communication remote machine in the embodiment provided in the first aspect of this application.
  • the ROF communication remote machine provided in this application can solve the problem of rapid reconfiguration of products that require different standards, different frequency bands, and different transmission powers in the prior art when applied to ROF systems.
  • This method adopts a sub-module structure. When the TDD and FDD modes need to be changed, only the switch module is needed. The general remote module does not need to be redesigned. In addition, the detector, low noise amplifier, laser, and down-conversion under TDD mode are all required. It does not need to be made into a patch form, which reduces the cost and power consumption, and also reduces the design time of the near-end machine PCB board. This method does not need to redesign and re-develop the whole, and does not need to consume a lot of manpower, material resources and time. It can quickly launch products to occupy the market and gain share, and has a first-mover advantage in the competition.
  • FIG. 1 is a schematic diagram of the ROF communication system under the FDD standard
  • FIG. 2 is a schematic diagram of the ROF communication system under the TDD standard
  • FIG. 3 is a schematic diagram of the sending steps of the downlink signal of the FDD standard
  • FIG. 4 is a schematic diagram of the sending steps of the downlink feedback signal of the FDD standard
  • FIG. 5 is a schematic diagram of the sending steps of the uplink signal of the FDD standard
  • FIG. 6 is a schematic diagram of the sending steps of the downlink feedback signal of the TDD standard
  • Figure 7 is a schematic diagram of a cost-saving ROF communication system under the TDD standard
  • Fig. 8 is a schematic diagram of the sending steps of a cost-saving downlink feedback signal under the TDD standard.
  • WDM optical wavelength division multiplexer, wavelength division multiplexing is the transmission of two or more different wavelength optical carrier signals (carrying various information) through the multiplexer (Also known as multiplexer, multiplexer) is combined together and coupled to the same optical fiber transmission technology; at the receiving end, through a demultiplexer (also known as demultiplexer or demultiplexer, Demultiplexer) separates the optical carriers of various wavelengths, and then is further processed by the optical receiver to restore the original signal.
  • This technology of simultaneously transmitting two or more optical signals of different wavelengths in the same optical fiber is called wavelength division multiplexing.
  • Coupler is an electrical-optical-electric conversion device that transmits electrical signals as a medium. It is composed of two parts: a light-emitting source and a light-receiver. The light-emitting source and the light-receiver are assembled in the same airtight casing, and they are separated by a transparent insulator. The pin of the light-emitting source is the input terminal, the pin of the light receiver is the output terminal, the common light-emitting source is a light-emitting diode, and the light receiver is a photodiode, a phototransistor, and so on.
  • the circulator is a device that allows electromagnetic waves to be transmitted in a one-way loop.
  • the principle of the circulator is the anisotropic characteristics of a magnetic field biased ferrite material.
  • Isolator Isolater
  • the isolator is a kind of linear optocoupler isolation principle, the input signal is converted and output. The input, output and working power are isolated from each other, which is especially suitable for equipment and meters that require electrical isolation.
  • the isolator also known as the signal isolator, is an important part of the industrial control system.
  • the duplexer is the main accessory of different frequency duplex radio and repeater. Its function is to isolate the transmitting and receiving signals to ensure that the receiving and transmitting can work normally at the same time. It is composed of two groups of band-stop filters with different frequencies to prevent the transmitter from transmitting to the receiver.
  • Up/down conversion, up conversion the process of changing an input signal with a certain frequency to an output signal with a higher frequency (usually without changing the information content and modulation method of the signal).
  • Down conversion (down conversion).
  • the intermediate frequency signal obtained after mixing is lower than the original signal, then this mixing method is called down conversion.
  • the purpose of down-conversion is to reduce the carrier frequency of the signal or directly remove the carrier frequency to obtain a baseband signal.
  • Figure 1 is a schematic diagram of an ROF communication system involved in this application; the system includes a near-end machine and a remote machine, where the remote machine includes a first packaging module 101 and a second packaging module 102, where Figure 1 is A schematic diagram of the architecture of the FDD system.
  • FIG. 2 is a schematic diagram of the architecture of the TDD system.
  • the first packaging module 101 is connected to the proximal machine, the first packaging module 101 is connected to the second packaging module 102, and the first packaging module 101 is located between the proximal machine and the second packaging module 102.
  • 101 contains a wavelength division multiplexer WDM, in which the first branch 103 and the second branch 104 connected to the wavelength division multiplexer, the second branch route feeds back the second branch and the upstream second branch
  • the feedback second branch includes the first port 105
  • the uplink second branch includes the second port 106
  • the first port 105 and the second port 106 are connected to the second package module 102.
  • the first port 105 includes a first selection switch K1
  • the second port 106 includes a second selection switch K2, wherein the downlink signal is sent from the near-end computer to the second package module via the first branch 103 of the first package module 101 102.
  • the downlink signal is sent through the second encapsulation module 102; the downlink feedback signal is selected and transmitted by the second encapsulation module 102 to the first selection switch K1 in the first port 105 in the second branch through the feedback in the first encapsulation module 101
  • the first encapsulation module 101 is sent to the near-end machine by the first encapsulation module 101; the uplink signal is selected and transmitted to the first by the second selection switch K2 in the second port 106 in the second branch of the uplink of the second encapsulation module 102.
  • the packaging module 102 is sent by the first packaging module 102 to the near-end machine.
  • the purpose of splitting the ROF communication remote machine into the first package module and the second package module in the embodiment of this application is that when the ROF communication system needs to be replaced with different standards, different frequency bands, and different transmission power levels, the first One package module part does not need to be redesigned to complete the switch between TDD and FDD systems.
  • the components in the second package module only need to perform different frequency bands, Devices with different power levels, the same package, and the same pin definition are sufficient.
  • the detector LD1, low-noise amplifier L1, laser PD2, and down-conversion D1 under the second branch can also be saved.
  • the design of ADC1 therefore, this method of rapid reconfiguration of the ROF system does not need to consume a lot of manpower, material resources and time, and can quickly launch products to occupy the market to gain share and reduce the cost of production products.
  • the ROF communication remote machine includes a first packaging module 101 and a second packaging module 102, wherein the first packaging module 101 includes The wavelength division multiplexer, and the first branch 103 and the second branch 104 connected to the wavelength division multiplexer, wherein the first branch 103 includes a laser PD1, which is connected to the second package module and the second branch 104 divides
  • the feedback second branch has a first selector switch K1, the first switch K1 is connected to the first port 105 and the low noise amplifier L1, and the low noise amplifier L1 is connected through the detector LD1
  • the second upstream branch has a second selector switch K2, the second switch K2 is connected to the second port 105 and the low noise amplifier L2, and the low noise amplifier L2 is connected to the WDM through the detector LD2.
  • the first selection switch K1 and the second selection switch K2 are single-pole double-throw switches, and each selection switch has a fixed terminal and two selection terminals;
  • one end connected to the second package module 102 is a fixed end, and the other two ends are selection ends;
  • one end connected to the wavelength division multiplexer WDM is a fixed end, and the other two ends are selection ends;
  • the first selection switch K1 selects the fixed terminal to connect to the side selection terminal connected to the wavelength division multiplexer WDM, and selects to turn on the connection between the first port 105 and the wavelength division multiplexer WDM.
  • the second selector switch K2 selects the fixed end to connect with the select end on the side of the second package module 102, and selects to turn on the connection between the second port 106 and the wavelength division multiplexer WDM.
  • the first selection switch K1 selects the fixed terminal to connect to the side selection terminal connected to the wavelength division multiplexer WDM, and selects to turn on the connection between the first port 105 and the wavelength division multiplexer WDM.
  • the second selector switch K2 selects the fixed end to connect with the select end on the side of the second package module 102, and selects to turn on the connection between the second port 106 and the wavelength division multiplexer WDM.
  • Step S301 the first branch in the first encapsulation module is used to receive the downstream optical signal sent by the near-end machine from the wavelength division multiplexer WDM;
  • the near-end machine receives the downlink signal from the baseband unit, and converts the downlink signal into a downlink optical signal with a wavelength of ⁇ 1 in the near-end machine.
  • the downlink optical signal is transmitted through the wavelength division multiplexer, and the wavelength division multiplexer will
  • the downstream optical signal and the light of other wavelengths are converged together and sent to the first package module in the remote machine by light, and the wavelength division multiplexer WDM of the first package module separates the downstream optical signal with a wavelength of ⁇ 1. .
  • Step S302 Convert the downstream optical signal received from the first branch into a downstream electrical signal and send it to the second packaging module;
  • the downstream optical signal received from the first branch and sent by the wavelength division multiplexer is converted into a downstream electrical signal by the laser PD1 and sent to the second package module.
  • Step S303 the second packaging module receives the downlink electrical signal sent by the first packaging module
  • the second package module under the FDD system amplifies the downlink electrical signal through the power amplifier tube A1 in the second package module, and the amplified downlink electrical signal passes through the power coupler, and a large part of the power signal is sent to the circulator Process, and finally filter the signal through the filter at the end, and finally reach the antenna port of the remote machine for signal transmission.
  • Step S401 The second packaging module sends a downlink electrical signal to the first port in the first packaging module to control the conduction and feedback of the switch in the second branch;
  • the downlink electrical signal is amplified by the power amplifier tube and sent to the power coupler.
  • a small part of the power signal is sent to the second branch in the first package module through the first port.
  • the second branch is divided into the feedback first
  • the second branch and the second uplink branch the small part of the power downlink electrical signal is sent to the feedback second branch through the first port, and the feedback second branch includes a first selector switch K1, at this time
  • the first selection switch K1 selects the fixed end to connect to the side selection end connected to the wavelength division multiplexer WDM, selects to turn on the connection between the first port and the wavelength division multiplexer WDM
  • the second select switch K2 selects the fixed end connection With the selection terminal on the side of the second package module, the connection between the second port and the WDM is selected to be turned on.
  • the feedback second branch receives a small part of the power of the downlink electrical signal as the feedback downlink electrical signal, and sends it to the low-noise amplifier L1 for processing the downlink feedback electrical signal.
  • the processed downlink feedback signal is converted into by the detector LD1
  • the feedback downstream optical signal ⁇ 2 is sent to the wavelength division multiplexer WDM.
  • Step S402 where the wavelength division multiplexer WDM is used to receive the feedback downstream optical signal sent by the feedback second branch;
  • the feedback downstream optical signal is transmitted through the wavelength division multiplexer WDM.
  • the wavelength division multiplexer WDM converges the feedback downstream optical signal ⁇ 2 and light of other wavelengths and sends it to the near-end machine.
  • the wavelength division multiplexer in the ⁇ 2 separates the feedback downstream optical signal with a wavelength of ⁇ 2, and the separated feedback downstream optical signal is processed by the near-end computer into a feedback signal and sent to the baseband unit.
  • Step S403 wherein the baseband unit receives the feedback signal to perform data analysis
  • the feedback baseband signal received from the near-end device is analyzed through the data analysis of the baseband unit, and the distortion model of the power amplifier tube is analyzed.
  • the DPD predistortion algorithm is calculated to generate a new set of predistorted downlink baseband Signal, re-transmit the downlink signal, so that the nonlinearity of the power amplifier tube is corrected in real time, so as to achieve the purpose of predistorting the signal.
  • Step S501 wherein the remote terminal antenna receives the uplink signal and sends it to the first packaging module
  • the filtered uplink signal is sent to the circulator for processing, and the uplink electrical signal is sent from the circulator to the first package module.
  • Step S502 the first packaging module receives the uplink electrical signal, converts it into an uplink optical signal, and sends it to the near-end machine;
  • the second branch in the first encapsulation module is divided into a feedback second branch and an uplink second branch, and the uplink electrical signal is sent to the uplink second branch, and the uplink second branch includes a second option
  • the switch K2 sends the uplink electrical signal to the second uplink branch.
  • the first selector switch K1 selects the fixed end to connect to the side selector end connected to the wavelength division multiplexer WDM, and selects to turn on the first port and the wave
  • the second selection switch K2 selects the fixed end to be connected to the side selection end of the second package module, and selectively conducts the connection between the second port and the WDM.
  • the uplink second branch of the second branch Connect the uplink second branch of the second branch with the wavelength division multiplexer WDM, and send the uplink electrical signal to the low-noise amplifier L2 to process the uplink electrical signal.
  • the processed uplink electrical signal passes through The detector LD2 converts the upstream optical signal ⁇ 3 and sends it to the wavelength division multiplexer WDM.
  • Step S503 Receive the uplink optical signal sent by the first packaging module, convert it into an uplink electrical signal and send it to the baseband unit;
  • the upstream optical signal is transmitted through the wavelength division multiplexer WDM.
  • the wavelength division multiplexer WDM converges the upstream optical signal ⁇ 3 and the light of other wavelengths and sends the light to the near-end machine.
  • the wavelength division multiplexer in separates the upstream optical signal with a wavelength of ⁇ 3, converts the separated upstream optical signal into an upstream signal through the near-end machine, and sends it to the baseband unit.
  • the ROF communication remote machine under the FDD system needs to switch from the FDD system to the TDD system, it only needs to switch the second package module under the corresponding FDD to the second package module under the TDD, the connection mode of the other ports and the signal direction Neither change, and at the downlink moment of the TDD system, by selecting the first selector switch K1, selecting the fixed end to connect to the side selector end of the second selector switch K2, and selecting to turn on the connection between the first port and the second selector switch K2, And the second selection switch K2, the selection fixed terminal is connected to the side selection terminal of the first selection switch K1, and the connection between the second selection switch K2 and the first selection switch K1 is selectively turned on.
  • the connection mode the feedback downlink signal switched to the TDD standard can be sent to the first packaging module through the second uplink branch.
  • the device that feeds back the second branch may not be specifically designed.
  • the ROF communication remote machine includes a first packaging module 201 and a second packaging module 202, wherein the first packaging module 201 includes The wavelength division multiplexer, and the first branch 203 and the second branch 204 connected to the wavelength division multiplexer, wherein the first branch 203 includes a laser PD1, and the second branch 204 is connected to the second package module and divided
  • the feedback second branch has a first selector switch K1, the first switch K1 is connected to the first port 205 and the low noise amplifier L1, and the low noise amplifier L1 is connected through the detector LD1
  • the second upstream branch has a second selector switch K2, the second switch K2 is connected to the second port 205 and the low noise amplifier L2, and the low noise amplifier L2 is connected to the WDM through the detector LD2.
  • the first selection switch K1 and the second selection switch K2 are single-pole double-throw switches, and each selection switch has a fixed terminal and two selection terminals;
  • one end connected to the second package module 202 is a fixed end, and the other two ends are selection ends;
  • one end connected to the wavelength division multiplexer WDM is a fixed end, and the other two ends are selection ends;
  • the first selection switch K1 selects the fixed terminal to connect to the side selection terminal connected to the wavelength division multiplexer WDM, and selects to turn on the connection between the first port 205 and the wavelength division multiplexer WDM.
  • the second selector switch K2 selects the fixed terminal to connect with the select terminal on the side of the second package module 202, and selects to turn on the connection between the second port 206 and the wavelength division multiplexer WDM.
  • the first selection switch K1 selects the fixed terminal to connect to the side selection terminal connected to the wavelength division multiplexer WDM, and selects to turn on the connection between the first port 205 and the wavelength division multiplexer WDM.
  • the second selector switch K2 selects the fixed terminal to connect with the select terminal on the side of the second package module 202, and selects to turn on the connection between the second port 206 and the wavelength division multiplexer WDM.
  • the fixed terminal is connected to the side selection terminal of the second selection switch K2, and the connection between the first port 205 and the second selection switch K2 is selected to be turned on.
  • the second selection switch K2 the selection fixed end is connected to the side selection end of the first selection switch K1, and the connection between the second selection switch K2 and the first selection switch K1 is selectively turned on.
  • the sending steps of the downlink signal of the TDD standard are roughly the same as the FDD method, and only the second encapsulation module differs in the end signal processing method of the downlink signal. Those skilled in the art should be aware of this difference, and will not be described here too much.
  • Step S601 The second packaging module sends a downlink electrical signal to the first port in the first packaging module to control the conduction and feedback of the switch in the second branch;
  • the downlink electrical signal is amplified by the power amplifier tube and sent to the power coupler.
  • a small part of the power signal is sent to the second branch in the first package module through the first port.
  • the second branch is divided into the feedback first
  • the second branch and the second uplink branch the small part of the power downlink electrical signal is sent to the feedback second branch through the first port, and the feedback second branch includes a first selector switch K1, at this time
  • the first selection switch K1 selects the fixed end to connect to the side selection end connected to the wavelength division multiplexer WDM, selects to turn on the connection between the first port and the wavelength division multiplexer WDM
  • the second select switch K2 selects the fixed end connection With the selection terminal on the side of the second package module, the connection between the second port and the WDM is selected to be turned on.
  • the feedback second branch receives a small part of the power of the downlink electrical signal as the feedback downlink electrical signal, and sends it to the low noise amplifier L1 for processing the downlink feedback electrical signal.
  • the processed downstream feedback signal is converted into a feedback downstream optical signal ⁇ 2 by the detector LD1 and sent to the wavelength division multiplexer WDM.
  • Step S602 wherein the wavelength division multiplexer WDM is used to receive the feedback downstream optical signal sent by the feedback second branch;
  • the feedback downstream optical signal is transmitted through the wavelength division multiplexer WDM.
  • the wavelength division multiplexer WDM converges the feedback downstream optical signal ⁇ 2 and light of other wavelengths and sends it to the near-end machine.
  • the wavelength division multiplexer in the ⁇ 2 separates the feedback downstream optical signal with a wavelength of ⁇ 2, and the separated feedback downstream optical signal is processed by the near-end computer into a feedback signal and sent to the baseband unit.
  • Step S603 wherein the baseband unit receives the feedback signal to perform data analysis
  • the feedback baseband signal received from the near-end device is analyzed through the data analysis of the baseband unit, and the distortion model of the power amplifier tube is analyzed.
  • the DPD predistortion algorithm is calculated to generate a new set of predistorted downlink baseband Signal, re-transmit the downlink signal, so that the nonlinearity of the power amplifier tube is corrected in real time, so as to achieve the purpose of predistorting the signal.
  • the sending steps of the uplink signal of the TDD standard are roughly the same as the FDD method, and only the second encapsulation module has a difference in the signal processing method of the uplink signal at the end. Those skilled in the art should be aware of this difference, and will not be described here too much.
  • This embodiment provides an ROF communication remote machine applied to the TDD standard, including a first packaging module 701 and a second packaging module 702.
  • the first package module 701 does not include the feedback second branch to save costs.
  • the ROF communication remote machine includes a first package module 701 and a second package module 702, wherein the first package module 701 includes a wavelength division multiplexer, and a first branch connected to the wavelength division multiplexer
  • the first branch 703 includes a laser PD1
  • the second branch 704 includes the second uplink branch
  • the second branch includes the first port 705,
  • the second branch 704 includes a laser PD1.
  • One port 705 is connected to the first selection switch K1, the first switch K1 is connected to the second selection switch K2, the second upstream branch has a second selection switch K2, and the second switch K2 is connected to the second port 706 and the low noise amplifier L2, low noise
  • the amplifier L2 is connected to the WDM through the detector LD2.
  • the first selection switch K1 and the second selection switch K2 are single-pole double-throw switches, and each selection switch has a fixed terminal and two selection terminals;
  • one end connected to the second package module 702 is a fixed end, and the other two ends are selection ends;
  • one end connected to the wavelength division multiplexer WDM is a fixed end, and the other two ends are selection ends;
  • connection mode of the first selection switch K1 is not limited.
  • the second selection switch K2 selects the fixed terminal to connect with the selection terminal on the side of the second package module 702, and selects to conduct the second port 706 with the wave The connection of the multiplexer WDM.
  • the fixed terminal of the first selection switch K1 is connected to the side selection terminal of the second selection switch K2, and the connection between the first port 705 and the second selection switch K2 is selectively turned on.
  • the second selection switch K2 The selection of the fixed terminal is connected with the one side selection terminal of the first selection switch, and the connection between the second selection switch K2 and the first selection switch K1 is selectively turned on.
  • the sending steps of the downlink signal of the TDD standard are roughly the same as the FDD method, and only the second encapsulation module differs in the end signal processing method of the downlink signal. Those skilled in the art should be aware of this difference, and will not be described here too much.
  • the sending steps of the downlink feedback signal of the TDD standard are shown in Figure 8 below;
  • Step S801 wherein the second packaging module sends a downlink electrical signal to the first port in the first packaging module to control the switch in the second uplink branch to be turned on;
  • the downlink electrical signal is amplified by the power amplifier tube and sent to the power coupler.
  • a small part of the power signal is sent to the second branch in the first package module through the first port.
  • the second branch is divided into the feedback first
  • the small part of the power downlink electrical signal passes through the first port first selector switch K1.
  • the first selector switch K1 selects the fixed end to connect to the second selector switch K2.
  • One side of the selection terminal selects to turn on the connection between the first port and the second selection switch K2, the second selection switch K2, selects the fixed terminal to connect with the side selection terminal of the first selection switch K1, and selects to turn on the second selection switch K2 and Connection of the first selection switch K1.
  • the second uplink branch receives a small part of the power of the downlink electrical signal as the feedback downlink electrical signal and sends it to the low noise In the amplifier L2, the downstream feedback electrical signal is processed, and the processed downstream feedback signal is converted into the feedback downstream optical signal ⁇ 3 by the detector LD2 and sent to the wavelength division multiplexer WDM.
  • Step S802 wherein the wavelength division multiplexer WDM is used to receive the feedback downlink optical signal sent by the second uplink branch;
  • the feedback downstream optical signal is transmitted through the wavelength division multiplexer WDM.
  • the wavelength division multiplexer WDM converges the feedback downstream optical signal ⁇ 3 with light of other wavelengths and sends it to the near-end machine.
  • the wavelength division multiplexer in the ⁇ 3 separates the feedback downstream optical signal with a wavelength of ⁇ 3, and the separated feedback downstream optical signal is processed by the near-end machine and converted into a feedback signal and sent to the baseband unit.
  • Step S803 wherein the baseband unit receives the feedback signal to perform data analysis
  • the feedback baseband signal received from the near-end device is analyzed through the data analysis of the baseband unit, and the distortion model of the power amplifier tube is analyzed.
  • the DPD predistortion algorithm is calculated to generate a new set of predistorted downlink baseband Signal, re-transmit the downlink signal, so that the nonlinearity of the power amplifier tube is corrected in real time, so as to achieve the purpose of predistorting the signal.
  • the sending steps of the uplink signal of the TDD standard are roughly the same as the FDD method, and only the second encapsulation module has a difference in the signal processing method of the uplink signal at the end. Those skilled in the art should be aware of this difference, and will not be described here too much.
  • This embodiment provides a ROF system with digital predistortion, and the ROF system with digital predistortion includes:
  • the near-end machine is used to modulate and convert the downstream signal into a downstream optical signal by the laser and send it to the ROF communication remote machine; and to receive the feedback signal and/or the uplink signal sent by the ROF communication remote machine.
  • the detector converts into an optical signal and sends it to the baseband unit through frequency conversion and demodulation;
  • An ROF communication remote machine including a first packaging module and a second packaging module
  • the first package module includes a wavelength division multiplexer, a first branch and a second branch connected to the wavelength division multiplexer, and the second branch communicates with the second branch through the first port and the second port.
  • Package module connection where:
  • the first branch is used to convert the downlink optical signal received by the wavelength division multiplexer from the near-end machine into a downlink electrical signal and send it to the second packaging module;
  • the second branch is used to receive the downlink electrical signal fed back by the first port and convert it into a downlink optical signal, then send it to the near-end machine via the wavelength division multiplexer, and receive the second port After the sent uplink electrical signal is converted into an uplink optical signal, it is sent to the near-end machine through the wavelength division multiplexer;
  • the second package module is used to amplify the power of the downlink electrical signal, transmit it through the antenna and feed it back to the first port after filtering, and receive the uplink electrical signal through the antenna, and send it to the second port after filtering and power amplification.
  • the second branch includes a feedback second branch and an uplink second branch;
  • the second branch of the feedback has a first selection switch, which is used to selectively turn on the connection between the first port and the wavelength division multiplexer, or turn on the connection between the first port and the second selection switch;
  • the second selection switch in the second uplink branch is used to selectively turn on the connection between the second port and the wavelength division multiplexer, or turn on the connection between the second selection switch and the first selection switch.
  • the first selection switch selectively turns on the connection between the first port and the wavelength division multiplexer
  • the second selection switch selectively turns on the connection between the second port and the wavelength division multiplexer
  • the first selection switch selects and turns on the connection between the first port and the wavelength division multiplexer
  • the second selection switch selects and turns on the connection between the second port and the wavelength division multiplexer
  • the first selection switch selectively turns on the connection between the first port and the wavelength division multiplexer
  • the second selection switch selectively turns on the connection between the second selection switch and the wavelength division multiplexer
  • the ROF communication remote device is of a TDD standard, and the second branch has a first selection switch and a second selection switch;
  • the second selection switch is used to select to turn on the connection between the second port and the wavelength division multiplexer, or to turn on the connection with the first selection switch, and the first selection switch is used to turn on or off the first port Connection with the second selector switch.
  • the second selection switch selects and turns on the connection between the second port and the wavelength division multiplexer
  • the first selection switch is used to conduct the connection between the first port and the second selection switch, and the second selection switch selectively conducts the connection with the first selection switch.
  • the first selection switch and/or the second selection switch are single-pole double-throw switches.
  • the second branch includes:
  • a low noise amplifier configured to amplify the power of the downlink electrical signal fed back from the first port and send it to the detector, and to amplify the power of the uplink electrical signal sent by the second port and send it to the detector;
  • the detector is used for converting the received downlink electrical signal into a downlink optical signal, and for converting the received uplink electrical signal into an uplink optical signal.
  • the ROF communication remote machine is in a TDD format
  • the second packaging module includes:
  • the power amplifier is used to amplify the power of the downlink electrical signal sent by the first packaging module and send it to the power coupler;
  • the power coupler is used to separate the downlink electrical signal received from the power amplifier into two electrical signals, one of which is sent to the circulator, and the other signal is sent to the second branch in the manner of feedback of the downlink electrical signal In the first port in;
  • a circulator which receives the downlink electrical signal from the power coupler and sends it to the filter, and the uplink electrical signal from the receiving filter is sent to the second port of the second branch;
  • the filter receives the downlink electrical signal sent by the circulator and sends it to the antenna after filtering, and the uplink electrical signal sent by the receiving antenna is sent to the circulator after filtering.
  • the ROF communication remote machine is of an FDD standard
  • the second packaging module includes:
  • the power amplifier is used to amplify the power of the downlink electrical signal sent by the first packaging module and send it to the power coupler;
  • the power coupler is used to separate the downlink electrical signal received from the power amplifier into two electrical signals, one of which is sent to the isolator, and the other signal is sent to the second branch by way of feedback of the downlink electrical signal In the first port in;
  • the isolator is used to receive the downlink electrical signal sent by the power coupler and send it to the duplexer;
  • the duplexer is used to receive the downlink electrical signal from the isolator and send it to the antenna, and to receive the uplink electrical signal from the antenna and send it to the second port in the second branch.
  • this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware.
  • this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

本申请提供了一种ROF通信远端机及ROF系统，包括第一封装模块、第二封装模块，第一封装模块包括波分复用器与其连接的第一支路、第二支路，第一支路用于将波分复用器从近端机接收的下行光信号，第二支路通过第一端口和第二端口与第二封装模块连接，转换为下行电信号并发送到第二封装模块，接收反馈的下行电信号并转换为下行光信号后送到近端机，及接收第二端口发送的上行电信号，发送到近端机，第二封装模块用于对下行电信号功率放大，通过滤波后经天线发射及反馈到第一端口，接收上行电信号，发送到第二端口。在需要更换不同的制式、频段、发射功率等级时，无需重新设计、开发，能够快速推出产品占领市场获得份额，在竞争中处于先发优势。

Description

一种ROF通信远端机及ROF系统 技术领域
本申请涉及无线通信技术领域，特别是涉及一种ROF通信远端机及ROF系统。
背景技术
ROF(radio over fiber，光载无线)通信系统中，远端单元中的最后一级通常为功率放大管，其作用为将信号放大到指定的功率大小，再经由天线来辐射到指定的区域。ROF技术包括将微波调制到激光上，调制后的光波通过光链路来传播，最后由基站进行接收和解调，由天线将解调后的微波进行辐射。为了使信号不失真地放大，需要对功率放大管进行线性化的处理。
现有技术最常见的功率放大管线性化的技术是模拟预失真技术和DPD(digital pre-distortion，数字预失真)技术，其中数字预失真通过预失真原件来和功放元件级联，非线性失真功能存在于信号处理域之间，与放大器失真数量等同，失真功能相反，以实现高度线性、无失真的系统。但非线性失真的偏差会随着时间、温度以及偏压的变化而变化。需要使用反馈机制，对输出信号进行采样反馈，并利用校正预失真算法，增加一个非线性电路来补偿功率放大器的非线性，对反馈信号进行采样处理分析，产生对于实时变化的下行输入信号，从而对功放管的非线性实时校正。
现有技术采用的反馈架构是基于反馈链路和上行链路各自独立的非模块化设计模块思路。兼顾了FDD(Frequency Division Duplexing，频分双工)制式与TDD(Time Division Duplexing，时分双工)制式，所述的FDD采用两个独立的信道分别进行向下传送和向上传送信息的技术。所述的TDD是在帧周期的下行线路操作中及时区分无线信道以及继续上行线路操作的一种技术。此种反馈架构下，TDD的制式还未做到较低的成本与较小代价。在更换不同制式、不同频段、不同发射功率等级时，需要将整个TDD或FDD远端模块或TDD或FDD远端模块的PCB进行重新设计。在需要快速占领市场获得份额市场环境下，已经很难被市场环境所接受。
综上所述，现有技术针对于ROF系统，能够对信号放大时产生失真的问题进行有效的解决，采用DPD技术能对功放管的非线性实时校正。但由于TDD的制式还没有被充分开发，后续可能存在着潜在的频繁性的模块的设计更换，并且在ROF系统中，各个制式之间、频段之间、发射等级之间的切换的流程仍然比较繁琐，对于整个模块都需要重新设计，在耗费了大量人力、物力与开发成本的同时，更不利于快速更迭的市场，使得现有技术难以快速占有市场份额应对竞争环境。
发明内容
目前行业内采用的反馈架构是基于反馈链路和上行链路独立设计的思路，虽然同时兼顾了FDD制式和TDD制式，但在这种方式在TDD制式下还没有做到最低成本、最小代价。如果需要更换不同的制式、不同的频段、不同的发射功率等级，需要把整个模块重新设计、重新开发，需要耗费大量的人力、物力和时间，已经快速推出产品占领市场获得份额，已经无法适应日益激烈的竞争环境。
本申请的第一方面提供了一种ROF通信远端机，包括第一封装模块、第二封装模块；
所述第一封装模块包括波分复用器、与所述波分复用器连接的第一支路、第二支路，所述第二支路通过第一端口和第二端口与第二封装模块连接，其中：
所述第一支路用于将所述波分复用器从所述近端机接收的下行光信号，转换为下行电信号并发送到所述第二封装模块；
所述第二支路用于接收所述第一端口反馈的下行电信号并转换为下行光信号后，经所述波分复用器发送到所述近端机，及接收所述第二端口发送的上行电信号并转换为上行光信号后，经所述波分复用器发送到所述近端机；
所述第二封装模块用于对下行电信号功率放大后，分别通过滤波后经天线发射及反馈到第一端口，以及通过天线接收上行电信号，经滤波和功率放大后发送到第二端口。
本申请的第二方面提供了一种带数字预失真ROF系统，所述带数字预失真ROF系统包括：
近端机，用于将下行信号通过调制及变频后，经激光器转换成下行光信号发送到ROF通信远端机中；及接收由ROF通信远端机发送的反馈信号和/或上行信号，经探测器转换成光信号后通过变频和解调发送到基带单元中；
本申请的第一方面提供的实施例中的ROF通信远端机。
利用本申请提供的ROF通信远端机可以解决现有技术在应用于ROF系统中，对于不同制式、不同频段、不同发射功率等指标需求产品的快速重构的问题。本方法采用分模块式构造，在需要进行TDD和FDD模式更换时，只需切换模块，通用的远端模块无需重新设计，并且在TDD制式下的探测器、低噪放、激光器、下变频都不需要做成贴片形式，即降低了成本和功耗，也减少了近端机PCB板的设计时间。本方法无需把整个重新设计、重新开发，无需耗费大量的人力、物力和时间，能够快速推出产品占领市场获得份额，在竞争中处于先发优势。
附图说明
图1为FDD制式下ROF通信系统示意图；
图2为TDD制式下ROF通信系统示意图；
图3为FDD制式的下行信号的发送步骤示意图；
图4为FDD制式的下行反馈信号的发送步骤示意图；
图5为FDD制式的上行信号的发送步骤示意图；
图6为TDD制式的下行反馈信号的发送步骤示意图；
图7为TDD制式下节省成本的ROF通信系统示意图；
图8为TDD制式下节省成本的下行反馈信号的发送步骤示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
为了方便理解，下面对本申请实施例中涉及的名词进行解释：
1)WDM光波分复用器，波分复用WDM(Wavelength Division Multiplexing，波分复用)是将两种或多种不同波长的光载波信号(携带各种信息)在发送端经复用器(亦称合波器，Multiplexer)汇合在一起，并耦合到光线路的同一根光纤中进行传输的技术；在接收端，经解复用器(亦称分波器或称去复用器，Demultiplexer)将各种波长的光载波分离，然后由光接收机作进一步处理以恢复原信号。这种在同一根光纤中同时传输两个或众多不同波长光信号的技术，称为波分复用。
2)耦合器(Coupler)，光电耦合器是以光为媒介传输电信号的一种电-光-电转换器件。它由发光源和受光器两部分组成，把发光源和受光器组装在同一密闭的壳体内，彼此间用透明绝缘体隔离。发光源的引脚为输入端，受光器的引脚为输出端，常见的发光源为发光二极管，受光器为光敏二极管、光敏三极管等等。
3)环形器(Circulator)，环形器是一种使电磁波单向环形传输的器件，环形器的原理是磁场偏置铁氧体材料各向异性特性。
4)隔离器(Isolater)，隔离器是一种采用线性光耦隔离原理，将输入信号进行转换输出。输入，输出和工作电源三者相互隔离，特别适合与需要电隔离的设备仪表配用。隔离器又名信号隔离器，是工业控制系统中重要组成部分。
5)双工器(Diplexer)，双工器是异频双工电台，中继台的主要配件，其作用是将发射和接收讯号相隔离，保证接收和发射都能同时正常工作。它是由两组不同频率的带阻滤波器组成，避免本机发射信号传输到接收机。
6)上/下变频，上变频(up conversion)，将具有一定频率的输入信号，改换成具有更高频率的输出信号(通常不改变信号的信息内容和调制方式)的过程。下变频(down conversion)，在接收机中，如果经过混频后得到的中频信号比原始信号低，那么此种混频方式叫做下变频。下变频的目的是为了降低信号的载波频率或是直接去除载波频率得到基带信号。
参见图1，图1是本申请涉及的一种ROF通信系统示意图；该系统包括近端机和远端机，其中远端机包括第一封装模块101以及第二封装模块102，其 中图1为FDD制式的架构示意图，图2为TDD制式的架构示意图。
其中所述第一封装模块101与近端机相连，第一封装模块101与第二封装模块102相连，第一封装模块101位于近端机与第二封装模块102之间，在第一封装模块101中包含有波分复用器WDM，其中与波分复用器连接的第一支路103与第二支路104，所述的第二支路由反馈第二支路和上行第二支路组成，反馈第二支路包含第一端口105，上行第二支路包含第二端口106，第一端口105与第二端口106与第二封装模块102连接。第一端口105中包含有第一选择开关K1，第二端口106包含有第二选择开关K2，其中下行信号从近端机经第一封装模块101的第一支路103发送到第二封装模块102，通过第二封装模块102进行下行信号的发送；下行反馈信号由第二封装模块102经第一封装模块101中反馈第二支路中第一端口105中的第一选择开关K1选择传输到第一封装模块101，由第一封装模块101发送到所述近端机；上行信号由第二封装模块102上行第二支路中第二端口106中的第二选择开关K2选择传输到第一封装模块102，由第一封装模块102发送到所述近端机。
本申请实施例中将ROF通信远端机拆分成为第一封装模块和第二封装模块的目的是，当ROF通信系统在需要更换不同的制式、不同的频段、不同的发射功率等级时，第一封装模块部分无须重新设计，就可以完成对于TDD与FDD的制式的切换，当切换制式或不同的频段、不同的发射功率等级时，对于第二封装模块中的元器件只需要进行不同频段、不同功率等级、相同封装、相同管脚定义的器件的贴片即可，并且TDD制式下，还可以节省反馈第二支路下的探测器LD1、低噪放L1、激光器PD2、下变频D1、ADC1的设计，因此，这种对于ROF系统的快速重构的方法无需耗费大量的人力、物力和时间，能够快速推出产品占领市场获得份额，降低生产产品的成本。
实施例1
本申请实施例提供了一种FDD制式下的ROF通信远端机，如图1所示，该ROF通信远端机包括第一封装模块101与第二封装模块102，其中第一封装模块101包括波分复用器，以及与波分复用器连接的第一支路103和第二支路104，其中第一支路103包含一激光器PD1，连接第二封装模块第二支路104又分为反馈第二支路和上行第二支路，反馈第二支路中具有第一选择开关K1，第一开关K1连接第一端口105和低噪放大器L1，低噪放大器L1通过探测器LD1连接到WDM，上行第二支路具有第二选择开关K2，第二开关K2连接第二端口105和低噪放大器L2，低噪放大器L2通过探测器LD2连接到WDM。
其中所述的第一选择开关K1和第二选择开关K2为单刀双掷开关，每个选择开关存在一个固定端和两个选择端；
其中在第一选择开关K1中，与第二封装模块102连接的一端为固定端，其余两端为选择端；
在第二选择开关K2中，与波分复用器WDM连接的一端为固定端，其余两端为选择端；
在上行时刻，所述第一选择开关K1，选择固定端连接与波分复用器WDM 连接的一侧选择端，选择导通第一端口105和波分复用器WDM的连接，所述第二选择开关K2，选择固定端连接与第二封装模块102一侧选择端，选择导通第二端口106与波分复用器WDM的连接。
在下行时刻，所述第一选择开关K1，选择固定端连接与波分复用器WDM连接的一侧选择端，选择导通第一端口105和波分复用器WDM的连接，所述第二选择开关K2，选择固定端连接与第二封装模块102一侧选择端，选择导通第二端口106与波分复用器WDM的连接。其中在FDD制式的下行信号的发送步骤如下图3所示，
步骤S301，第一封装模块中的第一支路用于从波分复用器WDM中接收近端机发出的下行光信号；
其中近端机从基带单元接收到下行信号，经过近端机中将下行信号转换为波长为λ1的下行光信号，将下行光信号经过波分复用器进行传输，由波分复用器将下行光信号和其他波长的光汇聚在一起经光发送到所述的远端机中的第一封装模块中，在第一封装模块的波分复用器WDM分离出波长为λ1的下行光信号。
步骤S302，将从第一支路接收到的下行光信号，转换为下行电信号并发送到第二封装模块中；
其中从第一支路接收到的由波分复用器发送的下行光信号经过激光器PD1转换为下行电信号发送到第二封装模块中。
步骤S303，第二封装模块接收第一封装模块发出的下行电信号；
FDD制式下的第二封装模块，通过第二封装模块中的功放管A1进行下行电信号的放大，将放大后的下行电信号，经过功率耦合器，一大部分功率信号都发送到环形器中进行处理，最终经过末端的滤波器进行信号的滤波处理，最终到达远端机的天线口进行信号的发送。
其中FDD制式的下行反馈信号的发送步骤如下图4所示；
步骤S401，第二封装模块向第一封装模块中的第一端口发送下行电信号，控制导通反馈第二支路中的开关；
通过功放管放大下行电信号，发送至功率耦合器中，其中一小部分功率信号经第一端口发送至第一封装模块中的第二支路中，所述的第二支路分为反馈第二支路和上行第二支路，所述的一小部分功率下行电信号通过第一端口发送到反馈第二支路中，其中反馈第二支路中包含一个第一选择开关K1，此时第一选择开关K1，选择固定端连接与波分复用器WDM连接的一侧选择端，选择导通第一端口和波分复用器WDM的连接，第二选择开关K2，选择固定端连接与第二封装模块一侧选择端，选择导通第二端口与波分复用器WDM的连接。将下行反馈信号发送到反馈第二支路中；
反馈第二支路接收一小部分功率的下行电信号作为反馈下行电信号，发送到低噪放大器L1中，进行下行反馈电信号的处理，经处理后的下行反馈信号，经过探测器LD1转换成反馈下行光信号λ2发送到波分复用器WDM中。
步骤S402，其中波分复用器WDM用于接收由反馈第二支路发送的反馈 下行光信号；
将反馈下行光信号经过波分复用器WDM进行传输，由波分复用器WDM将反馈下行光信号λ2和其他波长的光汇聚在一起发送到所述的近端机中，在近端机中的波分复用器分离出波长为λ2的反馈下行光信号，将分离出的反馈下行光信号，经过近端机的处理转化为反馈信号发送到基带单元中。
步骤S403，其中基带单元接收反馈信号进行数据分析；
从近端机端接收到的反馈基带信号，经过基带单元的数据分析，分析出功放管的失真的模型，根据失真的模型进行DPD预失真算法运算，从而产生一组新的预失真的下行基带信号，重新进行下行信号的发送流程从而使得功放管的非线性得到了实时校正，从而达到对于信号进行预失真的目的。
其中FDD制式的上行信号的发送步骤如下图5所示；
步骤S501，其中远端机末端天线接收到上行信号，发送到第一封装模块中；
在FDD制式下，上行信号在第二封装模块中经过滤波器进行滤波处理后，将滤波处理后的上行信号发送到环形器中进行处理，从环形器中向第一封装模块发送上行电信号。
步骤S502，第一封装模块接收上行电信号，将其转换成上行光信号发送到近端机中；
所述第一封装模块中的第二支路分为反馈第二支路和上行第二支路，上行电信号发送到上行第二支路中，其中上行第二支路中包含一个第二选择开关K2，将上行电信号发送到上行第二支路中，此时第一选择开关K1，选择固定端连接与波分复用器WDM连接的一侧选择端，选择导通第一端口和波分复用器WDM的连接，所述第二选择开关K2，选择固定端连接与第二封装模块一侧选择端，选择导通第二端口与波分复用器WDM的连接。
使第二支路中的上行第二支路与波分复用器WDM进行连接，将上行电信号发送到低噪放L2中，进行上行电信号的处理，经处理后的上行电信号，经过探测器LD2转换成上行光信号λ3发送到波分复用器WDM中。
步骤S503，接收第一封装模块发送的上行光信号，将其转换成上行电信号发送到基带单元中；
将上行光信号经过波分复用器WDM进行传输，由波分复用器WDM将上行光信号λ3和其他波长的光汇聚在一起经光发送到所述的近端机中，在近端机中的波分复用器分离出波长为λ3的上行光信号，将分离出的上行光信号，经过近端机转换为上行信号发送到基带单元中。
当FDD制式下的ROF通信远端机需要更换不同功率等级的输入信号时，只需要将不同功率等级、相同封装、相同管脚定义的器件的贴片进行更换，如上行信号的功率进行更换时，将只需要将第二封装模块中的双工器以及第一封装模块中的低噪放L2更换为不同功率等级、相同封装、相同管脚定义的贴片器件即可。
并且在FDD制式下的ROF通信远端机需要从FDD制式切换到TDD时，只需要将对应的FDD下的第二封装模块切换成TDD下的第二封装模块，其他 端口的连接方式以及信号走向均不改变，且在TDD制式的下行时刻，通过选择第一选择开关K1，选择固定端连接与第二选择开关K2一侧选择端，选择导通第一端口和第二选择开关K2的连接，且第二选择开关K2，选择固定端连接与第一选择开关K1一侧选择端，选择导通第二选择开关K2与第一选择开关K1的连接。通过此种连接方式可以使切换到TDD制式下的反馈下行信号通过上行第二支路发送到第一封装模块中。此种情况下，反馈第二支路的器件可以不进行具体设计。
实施例2
本申请实施例提供了一种TDD制式下的ROF通信远端机，如图2所示，该ROF通信远端机包括第一封装模块201与第二封装模块202，其中第一封装模块201包括波分复用器，以及与波分复用器连接的第一支路203和第二支路204，其中第一支路203包含一激光器PD1，连接第二封装模块第二支路204又分为反馈第二支路和上行第二支路，反馈第二支路中具有第一选择开关K1，第一开关K1连接第一端口205和低噪放大器L1，低噪放大器L1通过探测器LD1连接到WDM，上行第二支路具有第二选择开关K2，第二开关K2连接第二端口205和低噪放大器L2，低噪放大器L2通过探测器LD2连接到WDM。
其中所述的第一选择开关K1和第二选择开关K2为单刀双掷开关，每个选择开关存在一个固定端和两个选择端；
其中在第一选择开关K1中，与第二封装模块202连接的一端为固定端，其余两端为选择端；
在第二选择开关K2中，与波分复用器WDM连接的一端为固定端，其余两端为选择端；
在上行时刻，所述第一选择开关K1，选择固定端连接与波分复用器WDM连接的一侧选择端，选择导通第一端口205和波分复用器WDM的连接，所述第二选择开关K2，选择固定端连接与第二封装模块202一侧选择端，选择导通第二端口206与波分复用器WDM的连接。
在下行时刻，所述第一选择开关K1，选择固定端连接与波分复用器WDM连接的一侧选择端，选择导通第一端口205和波分复用器WDM的连接，所述第二选择开关K2，选择固定端连接与第二封装模块202一侧选择端，选择导通第二端口206与波分复用器WDM的连接。
作为一种可选的实施方式，在下行时刻，通过选择第一选择开关K1，选择固定端连接与第二选择开关K2一侧选择端，选择导通第一端口205和第二选择开关K2的连接，且第二选择开关K2，选择固定端连接与第一选择开关K1一侧选择端，选择导通第二选择开关K2与第一选择开关K1的连接。通过此种连接方式可以使切换到TDD制式下的反馈下行信号通过上行第二支路发送到第一封装模块201中。
其中TDD制式的下行信号的发送步骤与FDD的方式大致相同，仅在第二封装模块对于下行信号在末端信号处理方式有所区别，该领域技术人员应知晓此区别，这里不做过多描述。
其中TDD制式的下行反馈信号的发送步骤如下图6所示；
步骤S601，第二封装模块向第一封装模块中的第一端口发送下行电信号，控制导通反馈第二支路中的开关；
通过功放管放大下行电信号，发送至功率耦合器中，其中一小部分功率信号经第一端口发送至第一封装模块中的第二支路中，所述的第二支路分为反馈第二支路和上行第二支路，所述的一小部分功率下行电信号通过第一端口发送到反馈第二支路中，其中反馈第二支路中包含一个第一选择开关K1，此时第一选择开关K1，选择固定端连接与波分复用器WDM连接的一侧选择端，选择导通第一端口和波分复用器WDM的连接，第二选择开关K2，选择固定端连接与第二封装模块一侧选择端，选择导通第二端口与波分复用器WDM的连接。将下行反馈信号发送到反馈第二支路中，反馈第二支路接收一小部分功率的下行电信号作为反馈下行电信号，发送到低噪放大器L1中，进行下行反馈电信号的处理，经处理后的下行反馈信号，经过探测器LD1转换成反馈下行光信号λ2发送到波分复用器WDM中。
步骤S602，其中波分复用器WDM用于接收由反馈第二支路发送的反馈下行光信号；
将反馈下行光信号经过波分复用器WDM进行传输，由波分复用器WDM将反馈下行光信号λ2和其他波长的光汇聚在一起发送到所述的近端机中，在近端机中的波分复用器分离出波长为λ2的反馈下行光信号，将分离出的反馈下行光信号，经过近端机的处理转化为反馈信号发送到基带单元中。
步骤S603，其中基带单元接收反馈信号进行数据分析；
从近端机端接收到的反馈基带信号，经过基带单元的数据分析，分析出功放管的失真的模型，根据失真的模型进行DPD预失真算法运算，从而产生一组新的预失真的下行基带信号，重新进行下行信号的发送流程从而使得功放管的非线性得到了实时校正，从而达到对于信号进行预失真的目的。
其中TDD制式的上行信号的发送步骤与FDD的方式大致相同，仅在第二封装模块对上行信号在末端信号处理方式有所区别，该领域技术人员应知晓此区别，这里不做过多描述。
当TDD制式下的ROF通信远端机更换了不同功率等级的输入信号时，只需要将不同功率等级、相同封装、相同管脚定义的器件的贴片进行更换，如上行信号的功率进行更换时，将只需要将第二封装模块中的滤波器和环形器以及第一封装模块中的低噪放L2更换为不同功率等级、相同封装、相同管脚定义的贴片器件即可。
并且在TDD制式下的ROF通信远端机需要从TDD制式切换到FDD时，只需要将对应的TDD下的第二封装模块切换成FDD下的第二封装模块，其他端口的连接方式以及信号走向均不改变。
实施例3
本实施例提供了一种应用于TDD制式下的ROF通信远端机，包括第一封装模块701、第二封装模块702。其中第一封装模块701不包含反馈第二支路， 以节省成本。
如图7所示，该ROF通信远端机包括第一封装模块701与第二封装模块702，其中第一封装模块701包括波分复用器，以及与波分复用器连接的第一支路703和第二支路704，其中第一支路703包含一激光器PD1，连接第二封装模块第二支路704中包含上行第二支路，第二支路中包含第一端口705，第一端口705连接第一选择开关K1，第一开关K1连接第二选择开关K2，上行第二支路具有第二选择开关K2，第二开关K2连接第二端口706和低噪放大器L2，低噪放大器L2通过探测器LD2连接到WDM。
其中所述的第一选择开关K1和第二选择开关K2为单刀双掷开关，每个选择开关存在一个固定端和两个选择端；
其中在第一选择开关K1中，与第二封装模块702连接的一端为固定端，其余两端为选择端；
在第二选择开关K2中，与波分复用器WDM连接的一端为固定端，其余两端为选择端；
在上行时刻，所述第一选择开关K1的连接方式不做限制，所述第二选择开关K2，选择固定端连接与第二封装模块702一侧选择端，选择导通第二端口706与波分复用器WDM的连接。
在下行时刻，所述第一选择开关K1，选择固定端连接与第二选择开关K2一侧选择端，选择导通第一端口705和第二选择开关K2的连接，所述第二选择开关K2，选择固定端连接与第一选择开关一侧选择端，选择导通第二选择开关K2与第一选择开关K1的连接。
其中TDD制式的下行信号的发送步骤与FDD的方式大致相同，仅在第二封装模块对于下行信号在末端信号处理方式有所区别，该领域技术人员应知晓此区别，这里不做过多描述。其中TDD制式的下行反馈信号的发送步骤如下图8所示；
步骤S801，其中第二封装模块向第一封装模块中的第一端口发送下行电信号，控制导通上行第二支路中的开关；
通过功放管放大下行电信号，发送至功率耦合器中，其中一小部分功率信号经第一端口发送至第一封装模块中的第二支路中，所述的第二支路分为反馈第二支路和上行第二支路，所述的一小部分功率下行电信号通过第一端口第一选择开关K1，此时第一选择开关K1，选择固定端连接与第二选择开关K2连接的一侧选择端，选择导通第一端口和第二选择开关K2的连接，第二选择开关K2，选择固定端连接与第一选择开关K1一侧选择端，选择导通第二选择开关K2与第一选择开关K1的连接。将下行反馈信号发送到上行第二支路中，将下行反馈信号发送到上行第二支路中，上行第二支路接收一小部分功率的下行电信号作为反馈下行电信号，发送到低噪放大器L2中，进行下行反馈电信号的处理，经处理后的下行反馈信号，经过探测器LD2转换成反馈下行光信号λ3发送到波分复用器WDM中。
步骤S802，其中波分复用器WDM用于接收由上行第二支路发送的反馈 下行光信号；
将反馈下行光信号经过波分复用器WDM进行传输，由波分复用器WDM将反馈下行光信号λ3和其他波长的光汇聚在一起发送到所述的近端机中，在近端机中的波分复用器分离出波长为λ3的反馈下行光信号，将分离出的反馈下行光信号，经过近端机的处理转化为反馈信号发送到基带单元中。
步骤S803，其中基带单元接收反馈信号进行数据分析；
从近端机端接收到的反馈基带信号，经过基带单元的数据分析，分析出功放管的失真的模型，根据失真的模型进行DPD预失真算法运算，从而产生一组新的预失真的下行基带信号，重新进行下行信号的发送流程从而使得功放管的非线性得到了实时校正，从而达到对于信号进行预失真的目的。
其中TDD制式的上行信号的发送步骤与FDD的方式大致相同，仅在第二封装模块对上行信号在末端信号处理方式有所区别，该领域技术人员应知晓此区别，这里不做过多描述。
当TDD制式下的ROF通信远端机更换了不同功率等级的输入信号时，只需要将不同功率等级、相同封装、相同管脚定义的器件的贴片进行更换，如上行信号的功率进行更换时，将只需要将第二封装模块中的滤波器和环形器以及第一封装模块中的低噪放L2更换为不同功率等级、相同封装、相同管脚定义的贴片器件即可。
并且在TDD制式下的ROF通信远端机需要从TDD制式切换到FDD时，只需要将对应的TDD下的第二封装模块切换成FDD下的第二封装模块，其他端口的连接方式以及信号走向均不改变。
实施例4
本实施例提供了一种带数字预失真ROF系统，所述带数字预失真ROF系统包括：
近端机，用于将下行信号通过调制及变频后，经激光器转换成下行光信号发送到ROF通信远端机中；及接收由ROF通信远端机发送的反馈信号和/或上行信号，经探测器转换成光信号后通过变频和解调发送到基带单元中；
一种ROF通信远端机，包括第一封装模块、第二封装模块；
所述第一封装模块包括波分复用器、与所述波分复用器连接的第一支路、第二支路，所述第二支路通过第一端口和第二端口与第二封装模块连接，其中：
所述第一支路用于将所述波分复用器从所述近端机接收的下行光信号，转换为下行电信号并发送到所述第二封装模块；
所述第二支路用于接收所述第一端口反馈的下行电信号并转换为下行光信号后，经所述波分复用器发送到所述近端机，及接收所述第二端口发送的上行电信号并转换为上行光信号后，经所述波分复用器发送到所述近端机；
所述第二封装模块用于对下行电信号功率放大后，分别通过滤波后经天线发射及反馈到第一端口，以及通过天线接收上行电信号，经滤波和功率放大后发送到第二端口。
可选地，所述第二支路包括反馈第二支路和上行第二支路；
所述反馈第二支路中具有第一选择开关，用于选择导通第一端口与波分复用器的连接，或导通第一端口和第二选择开关的连接；
所述上行第二支路中具有第二选择开关，用于选择导通第二端口与波分复用器的连接，或导通第二选择开关和第一选择开关的连接。
可选地，所述第一选择开关选择导通第一端口与波分复用器的连接，所述第二选择开关选择导通第二端口与波分复用器的连接。
可选地，在上行时刻，所述第一选择开关选择导通第一端口和波分复用器的连接，所述第二选择开关选择导通第二端口与波分复用器的连接；
在下行时刻，所述第一选择开关选择导通第一端口和波分复用器的连接，所述第二选择开关选择导通第二选择开关和波分复用器的连接。
可选地，所述ROF通信远端机为TDD制式，所述第二支路中具有第一选择开关和第二选择开关；
所述第二选择开关用于选择导通第二端口与波分复用器的连接，或导通与第一选择开关的连接，所述第一选择开关用于导通或断开第一端口与第二选择开关的连接。
可选地，在上行时刻，所述第二选择开关选择导通第二端口与波分复用器的连接；
在下行时刻，所述第一选择开关用于导通第一端口与第二选择开关的连接，所述第二选择开关选择导通与第一选择开关的连接。
可选地，所述第一选择开关和/或第二选择开关为单刀双掷开关。
可选地，所述第二支路中包括：
低噪声放大器，用于将第一端口反馈的下行电信号进行功率放大后发送到所述探测器，以及将第二端口发送上行电信号进行功率放大后发送到所述探测器；
探测器，用于将接收的下行电信号转换为下行光信号，以及用于将接收的上行电信号转换为上行光信号。
可选地，所述ROF通信远端机为TDD制式，所述第二封装模块中包括：
功率放大器，用于将所述由第一封装模块发出的下行电信号进行功率放大，发送到功率耦合器中；
功率耦合器，用于将从功率放大器中接收到的下行电信号，分离成两路电信号，其中一路信号发送到环形器中，另一路信号以反馈下行电信号的方式发送到第二支路中的第一端口中；
环形器，接收功率耦合器发出的下行电信号并发送至滤波器，接收滤波器发出的上行电信号发送至第二支路的第二端口中；
滤波器，接收由环形器发出的下行电信号，经过滤波后发送至天线，以及接收天线发出的上行电信号，经过滤波后发送至环形器中。
可选地，所述ROF通信远端机为FDD制式，所述第二封装模块包括：
功率放大器，用于将所述由第一封装模块发出的下行电信号进行功率放大，发送到功率耦合器中；
功率耦合器，用于将从功率放大器中接收到的下行电信号，分离成两路电信号，其中一路信号发送到隔离器中，另一路信号以反馈下行电信号的方式发送到第二支路中的第一端口中；
隔离器，用于接收所述功率耦合器发出的下行电信号，并发送至双工器中；
双工器，用于从所述隔离器接收下行电信号并发送到天线，以及从天线接收上行电信号，发送到第二支路中的第二端口中。本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (11)

  1. 一种ROF通信远端机，包括第一封装模块、第二封装模块，
    所述第一封装模块包括波分复用器、与所述波分复用器连接的第一支路、第二支路，所述第二支路通过第一端口和第二端口与第二封装模块连接，其中：
    所述第一支路用于将所述波分复用器从近端机接收的下行光信号，转换为下行电信号并发送到所述第二封装模块；
    所述第二支路用于接收所述第一端口反馈的下行电信号并转换为下行光信号后，经所述波分复用器发送到所述近端机，及接收所述第二端口发送的上行电信号并转换为上行光信号后，经所述波分复用器发送到所述近端机；
    所述第二封装模块用于对下行电信号功率放大后，分别通过滤波后经天线发射及反馈到第一端口，以及通过天线接收上行电信号，经滤波和功率放大后发送到第二端口。
  2. 根据权利要求1所述的ROF通信远端机，其特征在于，所述第二支路包括反馈第二支路和上行第二支路；
    所述反馈第二支路中具有第一选择开关，用于选择导通第一端口与波分复用器的连接，或导通第一端口和第二选择开关的连接；
    所述上行第二支路中具有第二选择开关，用于选择导通第二端口与波分复用器的连接，或导通第二选择开关和第一选择开关的连接。
  3. 根据权利要求2所述的ROF通信远端机，其特征在于，
    所述第一选择开关选择导通第一端口与波分复用器的连接，所述第二选择开关选择导通第二端口与波分复用器的连接。
  4. 根据权利要求2所述的ROF通信远端机，其特征在于，
    在上行时刻，所述第一选择开关选择导通第一端口和波分复用器的连接，所述第二选择开关选择导通第二端口与波分复用器的连接
    在下行时刻，所述第一选择开关选择导通第一端口和波分复用器的连接，所述第二选择开关选择导通第二选择开关和波分复用器的连接。
  5. 根据权利要求1所述的ROF通信远端机，其特征在于，所述ROF通信远端机为TDD制式，所述第二支路中具有第一选择开关和第二选择开关；
    所述第二选择开关用于选择导通第二端口与波分复用器的连接，或导通与第一选择开关的连接，所述第一选择开关用于导通或断开第一端口与第二选择开关的连接。
  6. 根据权利要求5所述的ROF通信远端机，其特征在于，
    在上行时刻，所述第二选择开关选择导通第二端口与波分复用器的连接；
    在下行时刻，所述第一选择开关用于导通第一端口与第二选择开关的连接，所述第二选择开关选择导通与第一选择开关的连接。
  7. 根据权利要求2或5所述的ROF通信远端机，其特征在于，所述第一选择开关和/或第二选择开关为单刀双掷开关。
  8. 根据权利要求1所述的ROF通信远端机，其特征在于，所述第二支路 中包括：
    低噪声放大器，用于将第一端口反馈的下行电信号进行功率放大后发送到探测器，以及将第二端口发送上行电信号进行功率放大后发送到所述探测器；
    所述探测器，用于将接收的下行电信号转换为下行光信号，以及用于将接收的上行电信号转换为上行光信号。
  9. 根据权利要求1所述的ROF通信远端机，其特征在于，所述ROF通信远端机为TDD制式，所述第二封装模块中包括：
    功率放大器，用于将由第一封装模块发出的下行电信号进行功率放大，发送到功率耦合器中；
    功率耦合器，用于将从功率放大器中接收到的下行电信号，分离成两路电信号，其中一路信号发送到环形器中，另一路信号以反馈下行电信号的方式发送到第二支路中的第一端口中；
    环形器，接收功率耦合器发出的下行电信号并发送至滤波器，接收滤波器发出的上行电信号发送至第二支路的第二端口中；
    滤波器，接收由环形器发出的下行电信号，经过滤波后发送至天线，以及接收天线发出的上行电信号，经过滤波后发送至环形器中。
  10. 根据权利要求1所述的ROF通信远端机，其特征在于，所述ROF通信远端机为FDD制式，所述第二封装模块包括：
    功率放大器，用于将由第一封装模块发出的下行电信号进行功率放大，发送到功率耦合器中；
    功率耦合器，用于将从功率放大器中接收到的下行电信号，分离成两路电信号，其中一路信号发送到隔离器中，另一路信号以反馈下行电信号的方式发送到第二支路中的第一端口中；
    隔离器，用于接收所述功率耦合器发出的下行电信号，并发送至双工器中；
    双工器，用于从所述隔离器接收下行电信号并发送到天线，以及从天线接收上行电信号，发送到第二支路中的第二端口中。
  11. 一种带数字预失真ROF系统，所述带数字预失真ROF系统包括：
    近端机，用于将下行信号通过调制及变频后，经激光器转换成下行光信号发送到ROF通信远端机中；及接收由ROF通信远端机发送的反馈信号和/或上行信号，经探测器转换成光信号后通过变频和解调发送到基带单元中；
    权利要求1～10任一项所述的ROF通信远端机。
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113595642B (zh) * 2020-04-30 2022-10-18 华为技术有限公司 通信设备和通信系统
CN112290970A (zh) * 2020-09-28 2021-01-29 浙江三维利普维网络有限公司 预失真系统、射频功放系统、tdd系统及fdd系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070147273A1 (en) * 2005-12-22 2007-06-28 Samsung Electronics Co.; Ltd ROF link system for supporting various services
US20080219670A1 (en) * 2007-03-06 2008-09-11 Samsung Electronics Co., Ltd. RoF system providing HD wireless communication service and signal control method for the same
CN201274476Y (zh) * 2008-09-18 2009-07-15 京信通信系统（中国）有限公司 一种数字光纤直放站系统
CN202282871U (zh) * 2011-09-01 2012-06-20 京信通信系统（中国）有限公司 一种数字直放站系统
CN205921592U (zh) * 2016-07-29 2017-02-01 四川天邑康和通信股份有限公司 一种一体化中射频数字模块

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002047409A1 (fr) 2000-12-08 2002-06-13 Matsushita Electric Industrial Co., Ltd. Systeme de station de base de communication radio comportant une station de base avancee optique
KR20020062409A (ko) * 2001-01-20 2002-07-26 삼성전자 주식회사 듀얼모드 휴대용 무선 단말기의 전력증폭기 효율 개선 회로
US7756421B2 (en) * 2002-10-03 2010-07-13 Ciena Corporation Electrical domain compensation of non-linear effects in an optical communications system
EP1639727B1 (en) * 2003-06-13 2014-04-30 Panasonic Corporation System, device, and method for radio frequency optical transmission
KR100663466B1 (ko) * 2005-12-09 2007-01-02 삼성전자주식회사 원격 억세스 유닛 및 이를 이용한 광무선 네트워크
KR100762637B1 (ko) * 2006-05-03 2007-10-01 삼성전자주식회사 Ｔｄｄ 방식의 무선 시스템 신호 전송을 위한 단일 파장양방향 ｒｏｆ 링크 장치
US20090116843A1 (en) 2006-05-12 2009-05-07 Siemens Home And Office Communication Devices Gmbh Device for Transmitting and Receiving Data and Corresponding Operating Method
KR100842533B1 (ko) * 2006-12-13 2008-07-01 삼성전자주식회사 시분할 듀플렉싱 방식 무선광섬유 링크 장치
US20100329680A1 (en) * 2007-10-29 2010-12-30 Marco Presi Optical networks
US20110268446A1 (en) * 2010-05-02 2011-11-03 Cune William P Providing digital data services in optical fiber-based distributed radio frequency (rf) communications systems, and related components and methods
CN102130805B (zh) * 2011-03-09 2013-06-19 山东大学 一种面向融合接入的多业务终端系统
JP2016082402A (ja) * 2014-10-16 2016-05-16 富士通株式会社 ベースバンド処理装置、無線装置、及び無線通信システム
CN104467970A (zh) * 2014-11-28 2015-03-25 北京邮电大学 信号混合传输的转换装置和方法
CN105656558B (zh) * 2015-07-13 2018-11-23 广州杰赛科技股份有限公司 实现多个通信制式接入的光纤分布系统及方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070147273A1 (en) * 2005-12-22 2007-06-28 Samsung Electronics Co.; Ltd ROF link system for supporting various services
US20080219670A1 (en) * 2007-03-06 2008-09-11 Samsung Electronics Co., Ltd. RoF system providing HD wireless communication service and signal control method for the same
CN201274476Y (zh) * 2008-09-18 2009-07-15 京信通信系统（中国）有限公司 一种数字光纤直放站系统
CN202282871U (zh) * 2011-09-01 2012-06-20 京信通信系统（中国）有限公司 一种数字直放站系统
CN205921592U (zh) * 2016-07-29 2017-02-01 四川天邑康和通信股份有限公司 一种一体化中射频数字模块

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4020845A4 *

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