Digital optical fiber remote system
Through the digital fiber remote pulling system, combined with the design of the proximal and distal units, the enhanced remote pulling and blind spot coverage of the radio frequency signal is achieved, solving the problem of high equipment replacement and construction costs.
Patent Information
- Application Number
- CN202422556818.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-23
AI Technical Summary
The equipment of existing digital repeater stations cannot be used when the base station is upgraded or removed or changed, resulting in high construction costs for operators and difficult for conventional systems to achieve blind coverage of radio frequency signals.
A digital fiber-remotion system is designed, including a proximal unit and a distal unit. Through the combination of a proximal base station antenna, a proximal RF module, a proximal digital conversion module, a distal base station antenna, a distal RF module, a power amplifier module and a distal digital conversion module, the enhanced signal dissmotion and blind spot coverage are achieved.
The enhanced and extended RF signals are achieved, and the problem of blind spot coverage of RF signals is solved, and the operator's equipment replacement and construction costs are reduced.
Smart Images
Figure CN223231185U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of communications, in particular to a digital optical fiber remote system. Background Art
[0002] With the rapid development of mobile communications technology, demand for electronic products is increasing, inevitably leading to concerns about mobile phone signal coverage. Mobile phone signals, or radio frequency (RF) signal propagation characteristics and obstruction by man-made or natural objects, often result in blind spots and weak signal areas, such as in basements, inside buildings, in neighborhoods surrounded by tall buildings, and in remote areas. These areas are prone to low connection rates, poor roaming, dropped calls, and even no signal at all, causing inconvenience for mobile phone users. Digital repeaters offer significant advantages in addressing large-area, long-distance signal coverage. They feature excellent retransmission signal quality (optical transmission loss does not affect the RF signal-to-noise ratio), uplink diversity, flexible networking options, and minimal interference to base stations.
[0003] Conventional digital repeaters use a customized fixed-frequency system to achieve extended signal coverage. Nearby base stations often require frequency expansion or frequency change due to upgrades. This can render the equipment unusable and necessitate removal and replacement, significantly increasing the operator's construction costs. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a digital optical fiber extension system to achieve the purpose of enhancing and extending the radio frequency signal, thereby realizing the blind area coverage function of the radio frequency signal.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0006] A digital optical fiber remote system includes a proximal unit and a distal unit, wherein the proximal unit includes a proximal base station antenna, a proximal radio frequency module, and a proximal digital conversion module, and the distal unit includes a distal base station antenna, a distal radio frequency module, a power amplifier module, and a distal digital conversion module;
[0007] The proximal RF module is electrically connected to the proximal base station antenna and the proximal digital conversion module respectively, the proximal digital conversion module is electrically connected to the remote digital conversion module, the remote RF module is electrically connected to the remote base station antenna and the power amplifier module respectively, and the power amplifier module is electrically connected to the remote digital conversion module.
[0008] Furthermore, the proximal digital conversion module includes a first A / D converter, a first D / A converter, a second D / A converter and a first FPGA chip, and the first FPGA chip is electrically connected to the remote digital conversion module, the first A / D converter, the first D / A converter and the second D / A converter respectively.
[0009] Furthermore, the proximal RF module includes a first RF module, a second RF module and a third RF module. The first RF module is electrically connected to the first A / D converter, the second RF module is electrically connected to the first D / A converter, and the third RF module is electrically connected to the second D / A converter. The first RF module and the third RF module are respectively connected to a proximal base station antenna.
[0010] Furthermore, the remote digital conversion module includes a third D / A converter, a second A / D converter, a third A / D converter and a second FPGA chip, and the second FPGA chip is electrically connected to the proximal digital conversion module, the third D / A converter, the second A / D converter and the third A / D converter respectively.
[0011] Furthermore, the power amplification module includes a power amplifier, an input end of the power amplifier is electrically connected to the third D / A converter and the second A / D converter respectively, and an output end of the power amplifier is electrically connected to the remote radio frequency module.
[0012] Furthermore, the remote RF module includes a fourth RF module and a fifth RF module. The fourth RF module is electrically connected to the output end of the power amplifier, and the fifth RF module is electrically connected to the remote base station antenna and the third A / D converter respectively.
[0013] Furthermore, it also includes a digital processing monitoring unit, which is electrically connected to the proximal radio frequency module, the proximal digital conversion module, the distal radio frequency module, the power amplification module and the distal digital conversion module respectively.
[0014] Furthermore, the digital processing monitoring unit includes a main control chip, the model of which is XC7K70T. The main control chip is electrically connected to the proximal RF module, proximal digital conversion module, distal RF module, power amplification module and distal digital conversion module respectively.
[0015] Furthermore, it also includes a radio frequency agile transceiver, and the digital processing monitoring unit is electrically connected to the proximal radio frequency module, the proximal digital conversion module, the distal radio frequency module, the power amplifier module and the distal digital conversion module through the radio frequency agile transceiver.
[0016] Furthermore, it also includes a clock chip, which is electrically connected to the digital processing monitoring unit.
[0017] The beneficial effects of the present invention are:
[0018] This solution is achieved by setting up a proximal unit and a distal unit. The proximal unit includes a proximal base station antenna, a proximal radio frequency module and a proximal digital conversion module. The distal unit includes a distal base station antenna, a distal radio frequency module, a power amplifier module and a distal digital conversion module. The proximal unit is mainly responsible for receiving the user's downlink mobile phone signal and returning the uplink mobile phone signal to the user; its downlink process is as follows: after the proximal base station antenna receives the user's downlink mobile phone signal, it passes through the proximal radio frequency module, and then enters the proximal digital conversion module for digital signal processing, and finally transmits it to the distal unit through optical fiber; its uplink process is as follows: the distal unit processes the transmitted mobile phone signal in the distal digital conversion module for digital signal processing, and then outputs it to the distal radio frequency module, and finally transmits it through the distal base station antenna. The remote unit is mainly responsible for receiving the uplink signal of the mobile phone, and at the same time, outputs the base station signal transmitted from the near-end unit through power amplification to achieve the function of extending the coverage of the mobile phone signal; its downlink process is: receiving the signal transmitted from the near-end unit, performing digital signal processing in the remote digital conversion module, and then outputting it to the power amplifier module, and then inputting it into the remote RF module, and finally outputting it to the user through the remote base station antenna; its uplink process is: the remote base station antenna receives the user's mobile phone signal, enters the remote digital conversion module through the remote RF module, and then performs digital signal processing in the remote digital conversion module, and finally transmits it to the near-end unit, so as to achieve the purpose of enhancing and extending the RF signal, thereby realizing the blind spot coverage function of the RF signal. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a connection block diagram of the digital optical fiber remote system of the present invention;
[0020] Description of labels:
[0021] 1. Proximal unit; 11. Proximal base station antenna; 12. Proximal radio frequency module; 121. First radio frequency module; 122. Second radio frequency module; 123. Third radio frequency module; 13. Proximal digital conversion module; 131. First A / D converter; 132. First D / A converter; 133. Second D / A converter; 134. First FPGA chip;
[0022] 2. Remote unit; 21. Remote base station antenna; 22. Remote RF module; 221. Fourth RF module; 222. Fifth RF module; 23. Power amplifier module; 24. Remote digital conversion module; 241. Third D / A converter; 242. Second A / D converter; 243. Third A / D converter; 244. Second FPGA chip. DETAILED DESCRIPTION
[0023] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.
[0024] Please refer to Figure 1 , the technical solution adopted by this utility model is:
[0025] A digital optical fiber remote system includes a proximal unit and a distal unit, wherein the proximal unit includes a proximal base station antenna, a proximal radio frequency module, and a proximal digital conversion module, and the distal unit includes a distal base station antenna, a distal radio frequency module, a power amplifier module, and a distal digital conversion module;
[0026] The proximal RF module is electrically connected to the proximal base station antenna and the proximal digital conversion module respectively, the proximal digital conversion module is electrically connected to the remote digital conversion module, the remote RF module is electrically connected to the remote base station antenna and the power amplifier module respectively, and the power amplifier module is electrically connected to the remote digital conversion module.
[0027] From the above description, it can be seen that the beneficial effects of the present invention are:
[0028] This solution is achieved by setting up a proximal unit and a distal unit. The proximal unit includes a proximal base station antenna, a proximal radio frequency module and a proximal digital conversion module. The distal unit includes a distal base station antenna, a distal radio frequency module, a power amplifier module and a distal digital conversion module. The proximal unit is mainly responsible for receiving the user's downlink mobile phone signal and returning the uplink mobile phone signal to the user; its downlink process is as follows: after the proximal base station antenna receives the user's downlink mobile phone signal, it passes through the proximal radio frequency module, and then enters the proximal digital conversion module for digital signal processing, and finally transmits it to the distal unit through optical fiber; its uplink process is as follows: the distal unit processes the transmitted mobile phone signal in the distal digital conversion module for digital signal processing, and then outputs it to the distal radio frequency module, and finally transmits it through the distal base station antenna. The remote unit is mainly responsible for receiving the uplink signal of the mobile phone, and at the same time, outputs the base station signal transmitted from the near-end unit through power amplification to achieve the function of extending the coverage of the mobile phone signal; its downlink process is: receiving the signal transmitted from the near-end unit, performing digital signal processing in the remote digital conversion module, and then outputting it to the power amplifier module, and then inputting it into the remote RF module, and finally outputting it to the user through the remote base station antenna; its uplink process is: the remote base station antenna receives the user's mobile phone signal, enters the remote digital conversion module through the remote RF module, and then performs digital signal processing in the remote digital conversion module, and finally transmits it to the near-end unit, so as to achieve the purpose of enhancing and extending the RF signal, thereby realizing the blind spot coverage function of the RF signal.
[0029] Furthermore, the proximal digital conversion module includes a first A / D converter, a first D / A converter, a second D / A converter and a first FPGA chip, and the first FPGA chip is electrically connected to the remote digital conversion module, the first A / D converter, the first D / A converter and the second D / A converter respectively.
[0030] Furthermore, the proximal RF module includes a first RF module, a second RF module and a third RF module. The first RF module is electrically connected to the first A / D converter, the second RF module is electrically connected to the first D / A converter, and the third RF module is electrically connected to the second D / A converter. The first RF module and the third RF module are respectively connected to a proximal base station antenna.
[0031] Furthermore, the remote digital conversion module includes a third D / A converter, a second A / D converter, a third A / D converter and a second FPGA chip, and the second FPGA chip is electrically connected to the proximal digital conversion module, the third D / A converter, the second A / D converter and the third A / D converter respectively.
[0032] Furthermore, the power amplification module includes a power amplifier, an input end of the power amplifier is electrically connected to the third D / A converter and the second A / D converter respectively, and an output end of the power amplifier is electrically connected to the remote radio frequency module.
[0033] Furthermore, the remote RF module includes a fourth RF module and a fifth RF module. The fourth RF module is electrically connected to the output end of the power amplifier, and the fifth RF module is electrically connected to the remote base station antenna and the third A / D converter respectively.
[0034] Furthermore, it also includes a digital processing monitoring unit, which is electrically connected to the proximal radio frequency module, the proximal digital conversion module, the distal radio frequency module, the power amplification module and the distal digital conversion module respectively.
[0035] Furthermore, the digital processing monitoring unit includes a main control chip, the model of which is XC7K70T. The main control chip is electrically connected to the proximal RF module, proximal digital conversion module, distal RF module, power amplification module and distal digital conversion module respectively.
[0036] Furthermore, it also includes a radio frequency agile transceiver, and the digital processing monitoring unit is electrically connected to the proximal radio frequency module, the proximal digital conversion module, the distal radio frequency module, the power amplifier module and the distal digital conversion module through the radio frequency agile transceiver.
[0037] Furthermore, it also includes a clock chip, which is electrically connected to the digital processing monitoring unit.
[0038] Please refer to Figure 1 , the first embodiment of the present utility model is:
[0039] A digital optical fiber remote system includes a proximal unit 1 and a distal unit 2. The proximal unit 1 includes a proximal base station antenna 11 (antenna size: φ182×90mm), a proximal radio frequency module 12, and a proximal digital conversion module 13 (antenna size: φ182×90mm). The distal unit 2 includes a distal base station antenna 21, a distal radio frequency module 22, a power amplifier module 23, and a distal digital conversion module 24.
[0040] The proximal RF module 12 is electrically connected to the proximal base station antenna 11 and the proximal digital conversion module 13 respectively, the proximal digital conversion module 13 is electrically connected to the remote digital conversion module 24, the remote RF module 22 is electrically connected to the remote base station antenna 21 and the power amplification module 23 respectively, and the power amplification module 23 is electrically connected to the remote digital conversion module 24.
[0041] The proximal digital conversion module 13 includes a first A / D converter 13 (the model used is ECR8668, and the chip model ECR8668 is a highly integrated chip that integrates RF up and down conversion, A / D analog-to-digital conversion, and D / A digital-to-analog conversion.) 1, a first D / A converter 132 (the model used is ECR8668), a second D / A converter 133 (the model used is ECR8668) and a first FPGA chip 134 (the chip model used is A7-75T of Xilinx). The first FPGA chip 134 is electrically connected to the remote digital conversion module 24, the first A / D converter 131, the first D / A converter 132, and the second D / A converter 133 respectively.
[0042] The proximal RF module 12 includes a first RF module 121 (the first RF module 121 includes a first RF chip, the chip of which is a chip of NXP Semiconductors with a model number of BLC8G27LS-240AV), a second RF module 122 (the second RF module 122 includes a second RF chip, the chip of which is a chip of Ampleon with a model number of BLM8G0710S-60PB), and a third RF module 123 (the third RF module 123 includes a third RF chip, the chip of which is a chip of Ampleon with a model number of BLM10D3438-35AB). The first RF module 121 is electrically connected to the first A / D converter 131, the second RF module 122 is electrically connected to the first D / A converter 132, and the third RF module 123 is electrically connected to the second D / A converter 133. The first RF module 121 and the third RF module 123 are respectively connected to a proximal base station antenna 11.
[0043] The remote digital conversion module 24 includes a third D / A converter 241 (model ECR8668), a second A / D converter 242 (model ECR8668), a third A / D converter 243 (model ECR8668) and a second FPGA chip 244 (model A7-75T of Xilinx). The second FPGA chip 244 is electrically connected to the proximal digital conversion module 13, the third D / A converter 241, the second A / D converter 242 and the third A / D converter 243 respectively.
[0044] The power amplifier module 23 includes a broadband power amplifier to amplify and output the mobile phone signal to achieve the function of extending the signal coverage. The input end of the power amplifier is electrically connected to the third D / A converter 241 and the second A / D converter 242 respectively, and the output end of the power amplifier is electrically connected to the remote RF module 22.
[0045] The remote RF module 22 includes a fourth RF module 221 (the fourth RF module 221 includes a fourth RF chip, and the chip uses a chip model BLP9H10-30G of Ampleon Corporation) and a fifth RF module 222 (the fifth RF module 222 includes a fifth RF chip, and the chip uses a chip model HTN9G22P370S of Huatai Corporation). The fourth RF module 221 is electrically connected to the output end of the power amplifier, and the fifth RF module 222 is electrically connected to the remote base station antenna 21 and the third A / D converter 243 respectively.
[0046] It also includes a digital processing monitoring unit, which is electrically connected to the proximal radio frequency module 12, the proximal digital conversion module 13, the distal radio frequency module 22, the power amplification module 23 and the distal digital conversion module 24 respectively.
[0047] The digital processing monitoring unit includes a main control chip, the model of which is XC7K70T. The main control chip is electrically connected to the proximal RF module 12, the proximal digital conversion module 13, the distal RF module 22, the power amplification module 23 and the distal digital conversion module 24 respectively.
[0048] It also includes an RF agile transceiver (model AD9025), and the digital processing monitoring unit is electrically connected to the proximal RF module 12, the proximal digital conversion module 13, the distal RF module 22, the power amplifier module 23 and the distal digital conversion module 24 through the RF agile transceiver; the chip model AD9025 is a highly integrated RF agile transceiver that can provide four independently controlled transmitters and a dedicated observation receiver for monitoring each transmission channel. It integrates synthesizer and digital signal processing functions, and can provide a complete transceiver solution, which can realize the movable function of any frequency point from 700M to 5000M.
[0049] It also includes a clock chip, which is electrically connected to the digital processing monitoring unit; the clock chip model used is AU5329, which can output 10-channel multi-channel synchronous clocks to meet the purpose of multiple chips being able to process data synchronously.
[0050] It also includes an optical fiber port, which is electrically connected to the main control chip. The optical fiber port mainly provides an optical fiber transmission channel between the proximal unit 1 and the remote unit 2, so that the CPRI transmission protocol can be implemented inside the FPGA chip to achieve normal data transmission and communication between the proximal unit 1 and the remote unit 2.
[0051] It also includes an RJ45 network port, which is electrically connected to the main control chip. The RJ45 network port is mainly used to connect to the platform, or for customers to query device-related parameters and set the switch of device channels, etc. It can also perform remote program upgrades, etc.
[0052] It also includes a JK interface, which is electrically connected to the main control chip. The JK interface is mainly used to control external indicator lights, provide a 485 communication interface, and a communication interaction interface between modules.
[0053] It also includes a broadband first low-noise amplifier and a second low-noise amplifier. The first low-noise amplifier is electrically connected to the first RF module 121, and the second low-noise amplifier is electrically connected to the third RF module 123 to achieve the access and amplification function of the mobile phone signal.
[0054] The working principle of the above-mentioned digital optical fiber remote system is as follows:
[0055] The proximal unit 1 is mainly responsible for receiving the user's downlink mobile phone signal and returning the uplink mobile phone signal to the user; its downlink process is: after the proximal base station antenna 11 receives the user's downlink mobile phone signal, it passes through the first RF module 121, the second RF module 122 and the third RF module 123 respectively, and then enters the first A / D converter 131, the first D / A converter 132 and the second D / A converter 133 respectively, and then goes to the first FPGA chip 134 for digital signal processing, and finally transmits it to the remote unit 2 through optical fiber; its uplink process is: the remote unit 2 performs digital signal processing on the mobile phone signal transmitted by the optical fiber inside the second FPGA chip 244, and then outputs it to the fifth RF module 222 through the third A / D converter 243, and finally outputs it to the user through the remote base station antenna 21.
[0056] The remote unit 2 is mainly responsible for receiving the uplink signal of the mobile phone, and at the same time outputs the base station signal transmitted from the near-end unit 1 through power amplification to achieve the function of extending the coverage of the mobile phone signal; its downlink process is: receiving the signal transmitted from the optical fiber of the near-end unit 1, performing digital signal processing inside the second FPGA chip 244, and then outputting it to the power amplifier through the third D / A converter 241 and the second A / D converter 242, and then inputting it into the fourth RF module 221, and finally outputting it to the user through the remote base station antenna 21; its uplink process is: the remote base station antenna 21 receives the user's mobile phone signal, enters the third A / D converter 243 through the fourth RF module 221, and then performs digital signal processing inside the second FPGA chip 244, and finally transmits it to the near-end unit 1 through optical fiber.
[0057] The digital fiber optic remote system designed in this scheme adopts a broadband module design scheme for the RF front end (power amplifier, first low noise amplifier and second low noise amplifier), and combines the processing of model AD9025 RF agile transceiver to support the frequency band of 700M to 5000M. Therefore, as long as the RF port frequency of the AD9025 model RF agile transceiver is set to the specified frequency band, the acquisition and signal processing of signals in different frequency bands can be realized, that is, the shift of any frequency point within 700M to 5000M can be realized. At the same time, the AD9025 model RF agile transceiver supports 200M bandwidth signal processing. It only needs to perform 200M signal filtering processing inside the FPGA chip to realize the bandwidth selection function of 5M to 200M, and can realize the processing of any public network frequency band; the first FPGA chip 134 and the second FPGA chip 244 are The FPGA chip used is the XC7K70T, which can realize digital signal processing functions such as digital up and down conversion, digital filtering, digital automatic gain adjustment, etc., greatly improving the flexibility of the system. The signal processing process is as follows: the air interface RF signal is received and down-converted to zero frequency, and then the A / D converter converts the air interface analog signal into a digital signal and performs digital signal filtering. After being packaged into a frame through the CPRI transmission protocol, it is transmitted to the remote unit 2 through the optical fiber; the remote unit 2 transmits it through the optical fiber, and then unpacks it through the CPRI transmission protocol to restore the mobile phone signal at the air interface. The mobile phone signal is then filtered and input and output to the D / A converter for digital-to-analog conversion, and finally output to the power amplifier for signal amplification to achieve the purpose of enhancing and extending the mobile phone signal, thereby realizing the blind area coverage function of the mobile phone signal.
[0058] In summary, the present invention provides a digital optical fiber remote system, which is provided by setting a near-end unit and a far-end unit. The near-end unit includes a near-end base station antenna, a near-end radio frequency module and a near-end digital conversion module. The far-end unit includes a far-end base station antenna, a far-end radio frequency module, a power amplifier module and a far-end digital conversion module. The near-end unit is mainly responsible for receiving the user's downlink mobile phone signal and returning the uplink mobile phone signal to the user; its downlink process is: after the near-end base station antenna receives the user's downlink mobile phone signal, it passes through the near-end radio frequency module, and then enters the near-end digital conversion module for digital signal processing, and finally transmits it to the far-end unit through optical fiber; its uplink process is: the far-end unit processes the transmitted mobile phone signal in the far-end digital conversion module for digital signal processing, and then outputs it to the far-end radio frequency module. Then it is output to the user through the remote base station antenna; the remote unit is mainly responsible for receiving the uplink signal of the mobile phone, and at the same time, outputs the base station signal transmitted from the near-end unit through power amplification to achieve the function of extending the coverage of the mobile phone signal; its downlink process is: receiving the signal transmitted from the near-end unit, performing digital signal processing in the remote digital conversion module, and then outputting it to the power amplification module, and then inputting it into the remote RF module, and finally outputting it to the user through the remote base station antenna; its uplink process is: the remote base station antenna receives the user's mobile phone signal, enters the remote digital conversion module through the remote RF module, and then performs digital signal processing in the remote digital conversion module, and finally transmits it to the near-end unit, so as to achieve the purpose of enhancing and extending the RF signal, thereby realizing the blind spot coverage function of the RF signal.
[0059] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A digital optical fiber remote system, characterized in that: The device comprises a proximal unit and a distal unit, wherein the proximal unit comprises a proximal base station antenna, a proximal radio frequency module and a proximal digital conversion module, and the distal unit comprises a distal base station antenna, a distal radio frequency module, a power amplifier module and a distal digital conversion module; The proximal RF module is electrically connected to the proximal base station antenna and the proximal digital conversion module respectively, the proximal digital conversion module is electrically connected to the remote digital conversion module, the remote RF module is electrically connected to the remote base station antenna and the power amplifier module respectively, and the power amplifier module is electrically connected to the remote digital conversion module.
2. The digital optical fiber remote system according to claim 1, characterized in that: The proximal digital conversion module includes a first A / D converter, a first D / A converter, a second D / A converter and a first FPGA chip, and the first FPGA chip is electrically connected to the remote digital conversion module, the first A / D converter, the first D / A converter and the second D / A converter respectively.
3. The digital optical fiber remote system according to claim 2, characterized in that: The proximal RF module includes a first RF module, a second RF module and a third RF module. The first RF module is electrically connected to the first A / D converter, the second RF module is electrically connected to the first D / A converter, and the third RF module is electrically connected to the second D / A converter. The first RF module and the third RF module are each connected to a proximal base station antenna.
4. The digital optical fiber remote system according to claim 1, wherein: The remote digital conversion module includes a third D / A converter, a second A / D converter, a third A / D converter and a second FPGA chip, and the second FPGA chip is electrically connected to the proximal digital conversion module, the third D / A converter, the second A / D converter and the third A / D converter respectively.
5. The digital optical fiber remote system according to claim 4, characterized in that: The power amplification module includes a power amplifier, the input end of the power amplifier is electrically connected to the third D / A converter and the second A / D converter respectively, and the output end of the power amplifier is electrically connected to the remote radio frequency module.
6. The digital optical fiber remote system according to claim 5, characterized in that: The remote RF module includes a fourth RF module and a fifth RF module. The fourth RF module is electrically connected to the output end of the power amplifier, and the fifth RF module is electrically connected to the remote base station antenna and the third A / D converter respectively.
7. The digital optical fiber remote system according to claim 1, characterized in that: It also includes a digital processing monitoring unit, which is electrically connected to the proximal radio frequency module, the proximal digital conversion module, the distal radio frequency module, the power amplification module and the distal digital conversion module respectively.
8. The digital optical fiber remote system according to claim 7, characterized in that: The digital processing monitoring unit includes a main control chip, the model of which is XC7K70T. The main control chip is electrically connected to the proximal radio frequency module, the proximal digital conversion module, the distal radio frequency module, the power amplifier module and the distal digital conversion module respectively.
9. The digital optical fiber remote system according to claim 7, characterized in that: It also includes a radio frequency agile transceiver, and the digital processing monitoring unit is electrically connected to the proximal radio frequency module, the proximal digital conversion module, the distal radio frequency module, the power amplification module and the distal digital conversion module respectively through the radio frequency agile transceiver.
10. The digital optical fiber remote system according to claim 7, characterized in that: It also includes a clock chip, which is electrically connected to the digital processing monitoring unit.