CN116112079A - 5GNR efficient intelligent optical fiber radio frequency remote device - Google Patents

5GNR efficient intelligent optical fiber radio frequency remote device Download PDF

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Publication number
CN116112079A
CN116112079A CN202211721637.0A CN202211721637A CN116112079A CN 116112079 A CN116112079 A CN 116112079A CN 202211721637 A CN202211721637 A CN 202211721637A CN 116112079 A CN116112079 A CN 116112079A
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China
Prior art keywords
radio frequency
optical fiber
unit
digital
module
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CN202211721637.0A
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Chinese (zh)
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刘聪江
本杰明.K.许
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Fujian Xintong Information Technology Co ltd
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Fujian Xintong Information Technology Co ltd
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Priority to CN202211721637.0A priority Critical patent/CN116112079A/en
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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
    • H04B10/25752—Optical arrangements for wireless networks
    • H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
    • 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
    • H04B10/2589—Bidirectional transmission
    • H04B10/25891—Transmission components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Optical Communication System (AREA)

Abstract

The invention discloses a 5GNR efficient intelligent optical fiber radio remote unit, and relates to the field of new generation mobile communication. The device comprises a radio frequency digital access unit and one or more radio frequency remote equipment units, can support point-to-multipoint star networking, and has the advantages of simple structure, less investment, convenient installation and the like compared with a base station. The 5GNR efficient intelligent optical fiber radio remote device provided by the invention has the functions of wireless forwarding and bidirectional simultaneous amplification of 5G uplink/downlink signals, is used for rapidly solving the 5G signal coverage of a closed blind area or a weak signal area with low service, and is an ideal solution for the system and the wireless signal depth coverage of application scenes such as indoor scenes, basements or closed business activities.

Description

5GNR efficient intelligent optical fiber radio frequency remote device
Technical Field
The invention relates to the field of new generation mobile communication, in particular to a 5GNR efficient intelligent optical fiber radio remote device.
Background
The 5GNR (New radio) is a global 5G standard of a brand new air interface design based on OFDM, and is a very important cellular mobile technology base. Although the 5G can provide higher data transmission rate by adopting a high-frequency spectrum, the electromagnetic wave transmission distance of the frequency band is short and is easy to be blocked by an obstacle. This means that mobile operators need to build millions of small base stations, deploy them to each pole, each building, each house, even each room; the small base station has high cost, high power consumption, high cost, high power consumption and complex network summer heat distribution. The electric charge is a big daily investment of 5G operators.
In a typical base station, 70% of the power is consumed by the Power Amplifier (PA) and a larger heat dissipation system is needed to handle the extra heat. While improving energy efficiency and reducing heat dissipation have been a requirement of the wireless communication industry, it is not an urgent issue for 2G/3G/4G networks. Whereas for 5G networks it is quite different, operators want higher spectrum utilization and 5G base station deployment density is also greater than before, thus requiring higher peak-to-average power ratio (PAPR) of the radio frequency signal. However, as the PAPR increases, the efficiency of the PA decreases.
Therefore, it is necessary to provide a device to make up for the coverage deficiency of the 5G signal, enlarge the coverage area of the base station, supplement the coverage blind area, reduce the cost of network coverage, and further promote the 5G development.
Disclosure of Invention
The invention aims to solve the technical problem of providing a 5GNR efficient intelligent optical fiber radio frequency remote device, which expands the coverage area of a 5G base station with lower cost and realizes wide working bandwidth, high linearization and high efficiency under high frequency.
The invention is realized in the following way:
a5 GNR high-efficiency intelligent optical fiber radio frequency remote device comprises a radio frequency digital access unit and one or more radio frequency remote equipment units;
the radio frequency digital access unit comprises at least one NR information source receiving and transmitting module, the working frequency bands of different NR information source receiving and transmitting modules are different, and each NR information source receiving and transmitting module is connected with the first optical fiber interface unit;
the remote radio unit comprises at least one radio frequency signal receiving and transmitting module, the working frequency band of the radio frequency signal receiving and transmitting module corresponds to the NR information source receiving and transmitting module one by one, and each radio frequency signal receiving and transmitting module is connected with the second optical fiber interface unit; the second optical fiber interface unit is connected with the first optical fiber interface unit through an optical fiber;
the radio frequency signal receiving and transmitting module comprises:
the duplexer is designed in a cross coupling mode, is connected with the retransmission antenna, and is used for separating/combining uplink and downlink signals, filtering out-of-band signals or spurious signals and carrying out band-pass filtering on an uplink and downlink high-suppression degree;
the first digital processing unit is connected with the duplexer through an amplifier and a GaN power amplifier, and is used for converting the optical signal received by the second optical fiber interface unit into an analog signal and up-converting the analog signal into a radio frequency signal;
the digital predistortion processing unit is respectively connected with the first digital processing unit and the power amplifier;
the second digital processing unit is connected with the duplexer through an attenuator and an amplifier and is used for down-converting the radio frequency signals into digital signals and outputting the digital signals to the second optical fiber interface unit after processing.
Further, the NR source transceiver module includes:
the field intensity integrated module is used for receiving and transmitting NR information sources, and carrying out radio frequency signal amplification, gain attenuation control and automatic power control on uplink and downlink signals;
the first digital processing unit is connected with the field intensity integrated module through an amplifier and is used for carrying out digital processing on uplink NR signals;
the second digital processing unit is connected with the field intensity integrated module through an attenuator and an amplifier and is used for carrying out digital processing on the downlink NR signals;
the first digital processing unit and the second digital processing unit are also respectively connected with the first optical fiber interface unit.
Furthermore, the digital predistortion processing unit does not need parameter adjustment, is adaptive to various power amplifiers, and is internally provided with digital compensation corresponding to various radio frequency front-end systems.
Further, the system also comprises a monitoring unit which is respectively connected with the radio frequency digital access unit and the radio frequency remote equipment unit and is used for monitoring and controlling the operation parameters of the equipment.
Further, the monitoring unit is connected with the radio frequency digital access unit and the radio frequency remote equipment unit through an Ethernet interface and/or a Modem.
Further, the GaN power amplifier is based on a gallium nitride radio frequency power tube device, and the radio frequency power amplifier with broadband high efficiency is realized.
Further, the GaN power amplifier is designed in an asymmetric Doherty mode.
Further, the first digital processing unit comprises an ARM module, an FPGA module, a DAC module and an up-conversion module which are sequentially connected.
Further, the second digital processing unit comprises an ARM module, an FPGA module, an ADC module and a down-conversion module which are sequentially connected.
Further, the ARM module is used for performing deep dormancy, channel shutdown control and carrier shutdown control on the equipment.
The technical scheme of the embodiment of the invention has at least the following technical effects:
1. the field intensity integrated module is used for carrying out radio frequency signal amplification, gain attenuation control and automatic power control on uplink and downlink signals, and the digital predistortion processing unit is used for carrying out self-adaptive matching with the power amplifier, so that the power amplification efficiency and linearity are improved;
2. the GaN power amplifier designed in an asymmetric Doherty mode is adopted to further improve the overall power processing capacity and the linearity;
3. the monitoring unit is used for monitoring the equipment, and the ARM module is used for controlling equipment dormancy, channel shutoff, carrier shutoff and the like, so that the energy consumption of the device is saved;
4. the coverage of a 5G network is ensured on the premise of not increasing the number of base stations, and the manufacturing cost is far lower than that of a micro-cellular system with the same effect;
5. the system has the advantages of high efficiency, convenience in arrangement, simplicity in maintenance, capability of meeting the user 5G experience requirement, capability of realizing the requirement of each large operator, capability of rapidly solving the 5G signal coverage of a closed blind area or a weak signal area of low service, and ideal solution for the system and the wireless signal deep coverage of application scenes such as indoor scenes, basements or closed business activities.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a radio frequency digital access unit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a remote radio unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a monitoring unit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first digital processing unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second digital processing unit according to an embodiment of the invention.
Detailed Description
The embodiment of the invention provides a 5GNR efficient intelligent optical fiber radio frequency remote unit, which expands the coverage area of a 5G base station with lower cost and realizes wide working bandwidth, high linearization and high efficiency under high frequency.
The technical scheme in the embodiment of the invention has the following overall thought:
by designing a 5GNR (New radio) high-efficiency intelligent optical fiber radio frequency remote equipment device, the device plays a role in radio frequency signal remote in the wireless signal transmission process of a 5G communication system, is radio frequency annunciator equipment between a Base Station (BS) and a Mobile Station (MS), belongs to radio frequency amplifying equipment, and the basic function of the 5G radio frequency remote equipment is a radio frequency signal power enhancer. The 5G remote radio equipment is used as one of the necessary means for realizing the goal of 'small capacity and large coverage', mainly because the remote radio equipment is used for guaranteeing network coverage on the premise of not increasing the number of base stations, and the manufacturing cost of the remote radio equipment is far lower than that of a micro-cellular system with the same effect. The 5GNR remote radio device is a preferred solution to the extended coverage capability of the communication network.
The 5GNR remote radio equipment has the functions of wireless forwarding and bidirectional simultaneous amplification of 5G uplink/downlink signals, is used for rapidly solving the 5G signal coverage of a closed blind area or a weak signal area of low service, and is an ideal solution for the system and the wireless signal depth coverage of application scenes such as indoor scenes, basements or closed business playgrounds.
The wireless network solution is that the signals are transmitted to the remote radio unit for coverage by directly coupling the signals of the base station in a digital transmission mode. The whole system consists of a radio frequency digital access unit (also called an access unit) and a radio frequency remote equipment unit (also called a remote unit).
The radio frequency access unit is used for transmitting downlink radio frequency signals of the NR information source into the digital optical fiber radio frequency remote equipment system in a wired coupling mode, converting the downlink radio frequency signals into digital signals, and transmitting the digital signals to the remote unit after photoelectric conversion. Meanwhile, the digital signal uploaded by the remote unit is converted into an uplink radio frequency signal, and the uplink radio frequency signal is transmitted back to the information source in a wired mode. The radio frequency access unit supports the remote monitoring management function for the remote unit.
The remote unit converts the digital signal sent by the radio frequency access unit into a radio frequency signal to realize wireless coverage of the 5GNR signal; meanwhile, the wireless received uplink radio frequency signals are converted into digital signals and transmitted to the access unit.
Through the high-efficiency DPD digital predistortion power amplifier technology, the system has stronger expandability and self-adaptive capacity.
The embodiment of the invention provides a 5GNR efficient intelligent optical fiber radio remote unit, which comprises a radio digital access unit and one or more radio remote equipment units; and supporting chain networking, star networking and star chain combined networking. The radio frequency access unit and the remote units support point-to-multipoint star networking, and one radio frequency access unit can be connected with 4 paths of remote units in a star shape. An access unit supports a chain connection with at least 12 remote units. The radio frequency access unit and the remote unit adopt optical fiber transmission, and the maximum remote distance can reach 20km.
Referring to fig. 1, the radio frequency digital access unit includes at least one NR source transceiver module, the operating frequency bands of the different NR source transceiver modules are different, and each NR source transceiver module is connected to the first optical fiber interface unit. According to different application scenes, the method is divided into a single-channel type and a double-channel type. The channel capacity requirement of the "single channel" type is 1T1R, and the channel capacity requirement of the "dual channel" type is 2T2R. The combined LTEFDD and NR-FDD system can be supported simultaneously, the combined China Unicom and China telecom sharing system is supported, and any system frequency configuration is supported.
Referring to fig. 2, the remote radio unit includes at least one radio signal transceiver module, where an operating frequency band of the radio signal transceiver module corresponds to the NR signal source transceiver module one by one, and each radio signal transceiver module is connected to the second optical fiber interface unit; the second optical fiber interface unit is connected with the first optical fiber interface unit through an optical fiber; the optical fiber interface unit is used for bi-directionally transmitting the processed digital radio frequency and other signals to the far end in an optical fiber mode by the CPRI protocol.
The radio frequency signal receiving and transmitting module comprises:
the duplexer is designed in a cross coupling mode, is connected with the retransmission antenna, and is used for separating/combining uplink and downlink signals, filtering out-of-band signals or spurious signals and carrying out band-pass filtering on an uplink and downlink high-suppression degree; the cross coupling mode is to introduce radiation coupling between non-adjacent cavities to generate transmission zero near the passband, so that the passband is steeper to attenuate the filter, and the cross coupling mode has the characteristics of high out-of-band suppression degree, low adjacent channel leakage, small external dimension and the like.
The first digital processing unit is connected with the duplexer through an amplifier and a GaN power amplifier, and is used for converting the optical signal received by the second optical fiber interface unit into an analog signal and up-converting the analog signal into a radio frequency signal; the digital predistortion processing unit is respectively connected with the first digital processing unit and the power amplifier;
the GaN power amplifier is based on a gallium nitride radio frequency power tube device, adopts an asymmetric Doherty mode design, and combines a digital predistortion processing unit DPD to realize a radio frequency power amplifier with broadband high efficiency and high linearity. The digital predistortion processing unit does not need parameter adjustment, is adaptive to various power amplifiers, and is internally provided with digital compensation corresponding to various radio frequency front-end systems. In one possible mode, the digital predistortion processing unit is realized in a chip mode, the best performance can be adaptively achieved without adjusting parameters according to different power amplifiers, and the limit of matching 1 to 1 after the power amplifiers and DPDs of partial manufacturers are required to adjust parameters is solved. Support various systems: and under the condition of no parameter adjustment, the broadband and the mixed mode are simultaneously adopted. With various system compensations: the chip provides various digital compensation for the radio frequency front-end system from the perspective of the system, and greatly reduces the hardware debugging time of the system.
The second digital processing unit is connected with the duplexer through an attenuator and an amplifier and is used for down-converting the radio frequency signals into digital signals and outputting the digital signals to the second optical fiber interface unit after processing.
The amplifier is used for amplifying the radio frequency small signal in a low noise level so that the system obtains a small noise coefficient. The power amplifier is used for amplifying the radio frequency signal in multiple stages with high power, so that the power reaches the requirement of the far-end coverage distance, and the general radio frequency output power is 20W/40W.
In one possible implementation manner, the NR source transceiver module includes:
the field intensity integrated module is used for receiving and transmitting NR information sources, and carrying out radio frequency signal amplification, gain attenuation control and automatic power control on uplink and downlink signals;
the first digital processing unit is connected with the field intensity integrated module through an amplifier and is used for carrying out digital processing on uplink NR signals;
the second digital processing unit is connected with the field intensity integrated module through an attenuator and an amplifier and is used for carrying out digital processing on the downlink NR signals;
the first digital processing unit and the second digital processing unit are also respectively connected with the first optical fiber interface unit.
In a possible implementation manner, the system further comprises a monitoring unit, which is respectively connected with the radio frequency digital access unit and the radio frequency remote equipment unit and is used for monitoring and controlling the operation parameters of the equipment, and a communication interface is provided for local debugging and remote monitoring, and each monitoring parameter can be queried, set and reported locally (LAN remote) through RS-485, as shown in fig. 3.
Preferably, the monitoring unit is connected with the radio frequency digital access unit and the remote radio unit through an ethernet interface and/or a Modem, so that both wired and wireless monitoring modes can be realized.
In one possible implementation manner, the first digital processing unit includes an ARM module, an FPGA module, a DAC module, and an up-conversion module that are sequentially connected, as shown in fig. 4, where an optical signal received by the optical fiber interface unit is converted into a digital signal, and the digital signal is subjected to software digital processing (such as frequency selection, noise suppression, etc.) by the FPGA, and is input to the DAC through ARM control to convert the digital signal into an analog signal, and is up-converted into a radio frequency signal. The second digital processing unit comprises an ARM module, an FPGA module, an ADC module and a down-conversion module which are sequentially connected, as shown in fig. 5, the radio frequency signals are down-converted to the ADC to convert the radio frequency signals into digital signals, the digital signals are subjected to software digital processing (such as frequency selection, time delay adjustment and the like) by the FPGA, and the digital signals are output to the optical fiber interface unit to be modulated to the optical fiber for transmission to the far end through ARM control. The ARM module is used for controlling and monitoring individual control amounts of the access unit and the remote unit equipment; the device is subjected to deep dormancy, channel shutdown is controlled, carrier shutdown is controlled and the like, and meanwhile, each monitoring quantity is uploaded and downloaded through a LAN port and an RS485 communication interface. The energy consumption of the device is saved by controlling equipment dormancy, channel shutoff, carrier shutoff and the like.
The working principle of the embodiment of the invention is as follows:
the radio frequency digital access unit and the radio frequency remote equipment unit both comprise two transceiver modules which respectively work in a 1.8G frequency band and a 2.1G frequency band. The access unit receives an NR downlink information source of a 1.8G (2.1G) base station, enters a 1.8G (2.1G) field intensity integrated module for processing, an amplifier for amplifying small signals, an attenuator to a second digital processing unit, down-converts the signals, an ADC (analog-to-digital converter, also called an A/D converter) enters an FPGA for digital processing (carrier processing control and time delay adjustment), and enters an optical fiber interface unit for transmission to a far-end unit through an optical fiber line based on a CPRI (CommonPublicRadioInterface) protocol. The optical fiber interface CPRI protocol is received and then sent to a first digital processing unit; the method comprises the steps of entering an FPGA to carry out digital processing, carrying out up-conversion through a DAC (digital-to-analog converter, also called D/A converter), carrying out small signal amplification, carrying out high-power amplification through a 1.8G (2.1G) power amplifier, outputting to a 1.8G (2.1G) duplexer to carry out-of-band rejection, and carrying out retransmission through a 1.8G (2.1G) frequency band retransmission antenna.
1.8G (2.1G) frequency band retransmission antenna receives weak uplink signals in the air of the mobile phone, enters a 1.8G (2.1G) duplexer, is amplified by an amplifier and attenuated by low noise and enters a second digital processing unit, and is subjected to down-conversion and ADC (analog to digital converter) to enter an FPGA (field programmable gate array) for digital processing; the incoming optical fiber interface unit transmits the incoming optical fiber interface unit to the optical fiber interface of the access unit through an optical fiber line based on CPRI protocol; and (3) performing digital processing on the signals in an FPGA, performing small signal amplification after DAC and up-conversion, performing 1.8G (2.1G) field intensity integrated module processing, and receiving an NR uplink information source of the base station.
The remote radio device provided by the embodiment of the invention can simultaneously support the following energy-saving modes:
1) DPD+gallium nitride (GaN) radio frequency power tube and asymmetric Doherty: compared with the traditional equipment, the whole machine efficiency can be improved to: 30%, the linearity can be improved by about: 25DB.
2) Deep dormancy: the deep sleep function supports the most of the functions of the digital device to be closed.
3) And (3) channel shutoff: and the power emission of part of the radio frequency channels is closed, so that the energy consumption of the device is saved.
4) Carrier off: and the transmission of signals in the carrier bandwidth is closed, so that the energy consumption of the device is saved.
Under the normal working mode, the device is deeply dormant, the channel is turned off and the carrier is turned off to save energy by setting the energy-saving switch of the device. When the equipment is fully loaded with output power, after the energy-saving mode is switched on and off, the energy consumption of the equipment is reduced by at least 30% when the equipment is fully loaded.
When the equipment is fully loaded with output power, after the NR carrier is started to turn off the energy-saving mode, the energy consumption of the equipment is reduced by at least 15% when the equipment is fully loaded.
The invention carries out the amplification, gain attenuation control and automatic power control of the radio frequency signals on the uplink and downlink signals through the field intensity integrated module, and carries out self-adaptive matching with the power amplifier through the digital predistortion processing unit, thereby improving the power amplification efficiency and linearity; the GaN power amplifier designed in an asymmetric Doherty mode is adopted to further improve the overall power processing capacity and the linearity; the monitoring unit is used for monitoring the equipment, and the ARM module is used for controlling equipment dormancy, channel shutoff, carrier shutoff and the like, so that the energy consumption of the device is saved; the coverage of a 5G network is ensured on the premise of not increasing the number of base stations, and the manufacturing cost is far lower than that of a micro-cellular system with the same effect; the system has the advantages of high efficiency, convenience in arrangement, simplicity in maintenance, capability of meeting the user 5G experience requirement, capability of realizing the requirement of each large operator, capability of rapidly solving the 5G signal coverage of a closed blind area or a weak signal area of low service, and ideal solution for the system and the wireless signal deep coverage of application scenes such as indoor scenes, basements or closed business activities.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.

Claims (10)

1. A5 GNR efficient intelligent optical fiber radio frequency remote device is characterized in that: the system comprises a radio frequency digital access unit and more than one radio frequency remote equipment unit;
the radio frequency digital access unit comprises at least one NR information source receiving and transmitting module, the working frequency bands of different NR information source receiving and transmitting modules are different, and each NR information source receiving and transmitting module is connected with the first optical fiber interface unit;
the remote radio unit comprises at least one radio frequency signal receiving and transmitting module, the working frequency band of the radio frequency signal receiving and transmitting module corresponds to the NR information source receiving and transmitting module one by one, and each radio frequency signal receiving and transmitting module is connected with the second optical fiber interface unit; the second optical fiber interface unit is connected with the first optical fiber interface unit through an optical fiber;
the radio frequency signal receiving and transmitting module comprises:
the duplexer is designed in a cross coupling mode, is connected with the retransmission antenna, and is used for separating/combining uplink and downlink signals, filtering out-of-band signals or spurious signals and carrying out band-pass filtering on an uplink and downlink high-suppression degree;
the first digital processing unit is connected with the duplexer through an amplifier and a GaN power amplifier, and is used for converting the optical signal received by the second optical fiber interface unit into an analog signal and up-converting the analog signal into a radio frequency signal;
the digital predistortion processing unit is respectively connected with the first digital processing unit and the power amplifier;
the second digital processing unit is connected with the duplexer through an attenuator and an amplifier and is used for down-converting the radio frequency signals into digital signals and outputting the digital signals to the second optical fiber interface unit after processing.
2. The apparatus according to claim 1, wherein: the NR source transceiver module comprises:
the field intensity integrated module is used for receiving and transmitting NR information sources, and carrying out radio frequency signal amplification, gain attenuation control and automatic power control on uplink and downlink signals;
the first digital processing unit is connected with the field intensity integrated module through an amplifier and is used for carrying out digital processing on uplink NR signals;
the second digital processing unit is connected with the field intensity integrated module through an attenuator and an amplifier and is used for carrying out digital processing on the downlink NR signals;
the first digital processing unit and the second digital processing unit are also respectively connected with the first optical fiber interface unit.
3. The apparatus according to claim 1, wherein: the digital predistortion processing unit does not need parameter adjustment, is adaptive to various power amplifiers, and is internally provided with digital compensation corresponding to various radio frequency front-end systems.
4. The apparatus according to claim 1, wherein: the monitoring unit is respectively connected with the radio frequency digital access unit and the radio frequency remote equipment unit and is used for monitoring and controlling the operation parameters of the equipment.
5. The apparatus according to claim 4, wherein: the monitoring unit is connected with the radio frequency digital access unit and the radio frequency remote equipment unit through an Ethernet interface and/or a Modem.
6. The apparatus according to claim 1, wherein: the GaN power amplifier is based on a gallium nitride radio frequency power tube device, and the radio frequency power amplifier with broadband high efficiency is realized.
7. The apparatus according to claim 6, wherein: the GaN power amplifier is designed in an asymmetric Doherty mode.
8. The apparatus according to claim 1, wherein: the first digital processing unit comprises an ARM module, an FPGA module, a DAC module and an up-conversion module which are sequentially connected.
9. The apparatus as claimed in claim 8, wherein: the second digital processing unit comprises an ARM module, an FPGA module, an ADC module and a down-conversion module which are sequentially connected.
10. The apparatus according to claim 8 or 9, characterized in that: the ARM module is used for carrying out deep dormancy and channel shutdown control on equipment and controlling carrier shutdown.
CN202211721637.0A 2022-12-30 2022-12-30 5GNR efficient intelligent optical fiber radio frequency remote device Pending CN116112079A (en)

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Application Number Priority Date Filing Date Title
CN202211721637.0A CN116112079A (en) 2022-12-30 2022-12-30 5GNR efficient intelligent optical fiber radio frequency remote device

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CN116112079A true CN116112079A (en) 2023-05-12

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