Dual-mode working system of optical fiber repeater

Abstract

The utility model relates to the technical field of wireless train dispatching, and provides a dual-mode working system of an optical fiber repeater, which is characterized in that a 400M amplification module and a 450M amplification module respectively receive downlink signals of a station radio station through couplers, and the downlink output end of the 400M amplification module and the downlink output end of the 450M amplification module are respectively connected with two input ends of a power combiner I; the output end of the first power combiner is connected with the input end of the first digital board, the first digital board is connected with the second digital board through optical fibers, the output end of the second digital board is connected with the input end of the third power divider, and the two output ends of the third power divider are connected with the downlink input end of the 400 M integrated module and the downlink input end of the 450 M integrated module respectively. The downlink output end of the 400M integrated module is connected with the 400M input end of the multiplexer, the downlink output end of the 450M integrated module is connected with the 450M input end of the multiplexer, and the multiplexer transmits 400M and 450M downlink signals through the antenna. Through the above technical scheme, simultaneous processing of dual-band signals is realized, and applicability and flexibility of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless train dispatching technology field, specifically, relate to a kind of optical fiber repeater dual-mode working system. BACKGROUND

[0002] Railway wireless train dispatching communication system (abbreviation wireless train dispatching) is important means to ensure the normal operation of railway train, and the main role of optical fiber repeater is to amplify the wireless signal of station in both directions, to make up the weak field area caused by tunnel, gully, high building etc. Block signal, ensure the normal communication between station attendant, dispatching attendant and train driver, undertake the important task of weak field signal reinforcement of wireless train dispatching system, and it is an indispensable important component in wireless train dispatching system.

[0003] As shown in Figure 1 Wireless train dispatching system optical fiber repeater mainly has near-end machine, remote machine, optical fiber, coupler, network management server, network management remote terminal etc., and near-end machine is installed in the same machine room with station radio station, extracts a part of station radio station signal through direct coupling, then converts the signal into digital signal, transmits digital signal to remote machine in signal coverage area through optical fiber, remote machine restores digital signal into analog signal, then amplifies, finally emits signal through antenna, to achieve the purpose of weak field signal coverage.

[0004] With the improvement of demand, railway will gradually transform the existing 450M wireless train dispatching system into 400M wireless train dispatching system. And the optical fiber repeater of existing wireless train dispatching system is designed according to 450M wireless train dispatching system, cannot carry out weak field reinforcement to 400M wireless train dispatching system, and railway wireless train dispatching system cannot meet the compatibility of 450M wireless train dispatching and 400M wireless train dispatching two communication systems in transition period. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of optical fiber repeater dual-mode working system, solve the technical problems that the working mode of existing optical fiber repeater is single, cannot satisfy double mode work.

[0006] The technical scheme of the utility model is as follows:

[0007] The application discloses a kind of optical fiber repeater dual-mode system, including near-end machine and several remote machines, the near-end machine includes 400M amplification module, 450M amplification module, power combiner one and digital board one, the remote machine includes digital board two, power divider three, 400M integrated module, 450M integrated module and multiplexer, the downlink input end of 400M amplification module and the downlink input end of 450M amplification module are received by coupler respectively the downlink signal of station radio, the downlink output end of 400M amplification module and the downlink output end of 450M amplification module are connected two input ends of power combiner one respectively, the output end of power combiner one is connected the input end of digital board one, digital board one is connected with digital board two by optical fiber, the output end of digital board two is connected the input end of power divider three, two output ends of power divider three are connected the downlink input end of 400M integrated module and the downlink input end of 450M integrated module respectively, the downlink output end of 400M integrated module is connected the 400M input end of the multiplexer, the downlink output end of 450M integrated module is connected the 450M input end of the multiplexer, and the multiplexer emits 400M and 450M downlink signal by antenna.

[0008] Further, the near-end machine further includes power divider two, the remote machine further includes power combiner four, the multiplexer receives 400M and 450M uplink signal by antenna, the 400M output end of the multiplexer is connected the uplink input end of 400M integrated module, the 450M output end of the multiplexer is connected the uplink input end of 450M integrated module, the uplink output end of 400M integrated module and the uplink output end of 450M integrated module are connected two input ends of power combiner four respectively, the output end of power combiner four is connected the input end of digital board two, digital board two is connected with digital board one by optical fiber, the output end of digital board one is connected the input end of power divider two, two output ends of power divider two are connected the uplink input end of 400M amplification module and the uplink input end of 450M amplification module respectively, the uplink output end of 400M amplification module and the uplink output end of 450M amplification module are introduced into the transmission link of station radio by coupler respectively with uplink signal.

[0009] Further, 400M integrated module and power divider three are connected in series with power divider five, and radio frequency switch one is connected in series between multiplexer, 450M integrated module and power divider three are connected in series with power divider six, and radio frequency switch two is connected in series between multiplexer, the remote machine further includes 400M integrated spare module, 450M integrated spare module and switch control module,

[0010] The two output ends of the power divider three are connected with the input ends of the power divider five and the power divider six respectively, the two output ends of the power divider five are connected with the downlink input end of the 400M integrated module and the downlink input end of the 400M integrated standby module respectively, the downlink output end of the 400M integrated module and the downlink output end of the 400M integrated standby module are connected with the two input ends of the radio frequency switch one respectively, the output end of the radio frequency switch one is connected with the 400M input end of the multiplexer, the two output ends of the power divider six are connected with the downlink input end of the 450M integrated module and the downlink input end of the 450M integrated standby module respectively, the downlink output end of the 450M integrated module and the downlink output end of the 450M integrated standby module are connected with the two input ends of the radio frequency switch two respectively, the output end of the radio frequency switch two is connected with the 450M input end of the multiplexer, and the switch control module is used for switching the switch state of the radio frequency switch one and the radio frequency switch two.

[0011] Further,

[0012] The 400M amplification module is used for amplifying the signal of the 400M frequency band, and the 450M amplification module is used for amplifying the signal of the 450M frequency band.

[0013] The power combiner one is used for combining the downlink signals output by the 400M amplification module and the 450M amplification module together to provide a digital board one with a combined downlink signal containing the 400M and 450M frequency bands.

[0014] The digital board one is used for converting the downlink signal input by the power combiner one from an analog signal to a digital signal, and then modulating the digital signal to an optical carrier for transmission to a digital board two through an optical fiber.

[0015] The digital board two is used for receiving the downlink signal transmitted by the digital board one through the optical fiber, and converting the downlink signal from a digital signal to an analog signal for transmission to the power divider three.

[0016] The power divider three is used for dividing the downlink signal output by the digital board two into two paths to provide the 400M integrated module and the 450M integrated module respectively to realize signal distribution.

[0017] The 400M integrated module is used for filtering and amplifying the received downlink signal and then outputting the filtered and amplified downlink signal.

[0018] The 450M integrated module is used for filtering and amplifying the received downlink signal and then outputting the filtered and amplified downlink signal.

[0019] The multiplexer is used for combining the received downlink signals of the 400M frequency band and the 450M frequency band together and then transmitting the combined downlink signals through an antenna.

[0020] Further,

[0021] The power divider two is used for dividing the uplink signal output by the digital board one into two paths, and providing the uplink input end of the 400M amplification module and the 450M amplification module respectively;

[0022] The digital board one is also used for receiving the uplink signal transmitted by the digital board two through the optical fiber, and converting the uplink signal from a digital signal to an analog signal and then transmitting the analog signal to the power divider two;

[0023] The digital board two is also used for converting the uplink signal input by the power combiner four from an analog signal to a digital signal, and then modulating the digital signal to an optical carrier and transmitting the digital signal to the digital board one through the optical fiber;

[0024] The power combiner four is used for combining the uplink signals output by the 400M integrated module and the 450M integrated module together, and providing the digital board two with an uplink signal containing the combination of the 400M and 450M frequency bands;

[0025] The 400M integrated module is also used for receiving the 400M uplink signal output by the multiplexer, performing amplification processing, and then outputting the signal to the power combiner four;

[0026] The 450M integrated module is also used for receiving the 450M uplink signal output by the multiplexer, performing amplification processing, and then outputting the signal to the power combiner four;

[0027] The multiplexer is also used for separating the 400M frequency band uplink signal and the 450M frequency band uplink signal received from the antenna, and transmitting the signals to the 400M integrated module and the 450M integrated module respectively.

[0028] Further,

[0029] The power divider five is used for dividing the downlink signal output by the power divider three into two paths, and transmitting the signals to the downlink input end of the 400M integrated module and the 400M integrated backup module respectively;

[0030] The power divider six is used for dividing the 450M frequency band signal output by the power divider three into two paths, and transmitting the signals to the downlink input end of the 450M integrated module and the 450M integrated backup module respectively;

[0031] The radio frequency switch one is used for selecting and controlling the downlink signal output by the 400M integrated module and the 400M integrated backup module, and connecting one of the downlink signals to the 400M input end of the multiplexer according to the instruction of the switch control module;

[0032] The radio frequency switch two is used for selecting and controlling the downlink signal output by the 450M integrated module and the 450M integrated backup module, and connecting one of the downlink signals to the 450M input end of the multiplexer according to the instruction of the switch control module;

[0033] The 400M integrated backup module is used for filtering and amplifying the received downlink signal and then outputting.

[0034] The 450M integrated backup module is used for filtering and amplifying the received downlink signal and then outputting.

[0035] Further, the several remote machines include a head remote machine, several middle remote machines and a tail remote machine connected in sequence through optical fibers, the near-end machine is connected with the head remote machine through an optical fiber, and the near-end machine is connected with the tail remote machine through an optical fiber.

[0036] The working principle and beneficial effects of the utility model are as follows:

[0037] In the utility model, the signals sent by the station radio are processed and transmitted in double frequency bands. In the near-end machine, the downlink input ends of the 400M amplification module and the 450M amplification module receive the downlink signals of the station radio through the coupler, the two modules amplify the signals in respective frequency bands, then the downlink output ends of the two modules transmit the amplified signals to different input ends of the combiner one, and the combiner one sends the combined signals to the digital board one. The digital board one converts the received analog signals into digital signals and transmits the digital signals to the digital board two of the remote machine through the optical fiber. In the remote machine, the digital board two converts the received digital signals into analog signals, divides the analog signals into two paths through the power divider three, and sends the analog signals to the downlink input ends of the 400M integrated module and the 450M integrated module respectively. The two integrated modules further process the signals, and the processed signals are transmitted to the 400M input end and the 450M input end of the multiplexer respectively, and finally the multiplexer combines the 400M and 450M signals and transmits the signals through the antenna, so that the downlink signals in double frequency bands are covered.

[0038] The utility model realizes the simultaneous processing of double frequency band signals, can meet the communication demand of different equipment on the 400M and 450M frequency bands, improves the applicability and flexibility of the system, and makes the system play a role in the multi-frequency band communication scene. The utility model provides stable and reliable double frequency band signal coverage, effectively guarantees the communication and data transmission demand between on-site personnel.

[0039] The utility model will be explained in further detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is the principle schematic view of prior optical fiber repeater station;

[0041] Figure 2 It is the principle schematic view of the utility model discloses a kind of optical fiber repeater station double mode working system;

[0042] Figure 3A schematic diagram of a star type networking mode of an existing optical fiber repeater;

[0043] Figure 4 A schematic diagram of a chain type networking mode of an existing optical fiber repeater;

[0044] Figure 5 A schematic diagram of a ring type networking mode of an optical fiber repeater in the utility model. DETAILED DESCRIPTION

[0045] The technical scheme in the embodiments of the utility model will be apparently and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor are involved in the protection scope of the utility model.

[0046] Embodiment 1

[0047] The embodiment provides a dual-mode working system of an optical fiber repeater, which comprises a near-end machine and a plurality of remote machines, as shown in the figure. Figure 2 The near-end machine comprises a 400M amplification module, a 450M amplification module, a power combiner one and a digital board one, and the remote machine comprises a digital board two, a power divider three, a 400M integrated module, a 450M integrated module and a multiplexer.

[0048] Through the above-mentioned module composition, the working mode of the optical fiber repeater under the two frequency bands of 400M and 450M is realized, wherein each frequency band involves two working states of a downlink path (referring to the amplification path of the optical fiber repeater from the station radio to the CIR on the train) and an uplink path (referring to the amplification path from the CIR on the train to the station radio).

[0049] In the downlink path, the connection structure of the system is that the downlink input end of the 400M amplification module and the downlink input end of the 450M amplification module respectively receive the downlink signal of the station radio through couplers, the downlink output end of the 400M amplification module and the downlink output end of the 450M amplification module are respectively connected to the two input ends of the power combiner one, the output end of the power combiner one is connected to the input end of the digital board one, the digital board one is connected to the digital board two through an optical fiber, the output end of the digital board two is connected to the input end of the power divider three, the two output ends of the power divider three are respectively connected to the downlink input end of the 400M integrated module and the downlink input end of the 450M integrated module, the downlink output end of the 400M integrated module is connected to the 400M input end of the multiplexer, the downlink output end of the 450M integrated module is connected to the 450M input end of the multiplexer, and the multiplexer transmits the 400M and 450M downlink signals through an antenna.

[0050] The transmission flow of the downlink signal is as follows:

[0051] The station radio transmits 400M and 450M signals, which are received by the couplers of the 400M and 450M amplification modules respectively. After being amplified by the respective amplification modules, the 400M and 450M signals are combined by the power combiner. The combined signals enter the digital board 1 and are converted into digital signals through analog front end, ADC and FPGA processing. The digital signals are transmitted to the digital board 2 of the remote machine through optical fiber. The digital board 2 converts the digital signals into analog signals through DAC and analog front end, and transmits the analog signals to the power divider 3. The power divider 3 distributes the signals to the 400M and 450M integrated modules. After being processed by the 400M and 450M integrated modules, the signals are transmitted to the multiplexer. The multiplexer combines the signals and transmits them through the antenna.

[0052] In the uplink path, the connection structure of the system is as follows: the near-end machine further includes the power divider 2, the remote machine further includes the power combiner 4, the multiplexer receives the 400M and 450M uplink signals through the antenna, the 400M output end of the multiplexer is connected to the uplink input end of the 400M integrated module, the 450M output end of the multiplexer is connected to the uplink input end of the 450M integrated module, the uplink output end of the 400M integrated module and the uplink output end of the 450M integrated module are respectively connected to the two input ends of the power combiner 4, the output end of the power combiner 4 is connected to the input end of the digital board 2, the digital board 2 is connected to the digital board 1 through optical fiber, the output end of the digital board 1 is connected to the input end of the power divider 4, the two output ends of the power divider 4 are respectively connected to the uplink input end of the 400M amplification module and the uplink input end of the 450M amplification module, and the uplink output end of the 400M amplification module and the uplink output end of the 450M amplification module are respectively connected to the uplink input end of the 400M amplification module and the uplink input end of the 450M amplification module.

[0053] The transmission process of the uplink signal is as follows:

[0054] The antenna receives 400M and 450M signals, which are separated by the multiplexer. The separated signals enter the 400M and 450M integrated modules respectively. After being processed by the 400M and 450M integrated modules, the signals are combined by the power combiner 4. The signals of the power combiner 4 enter the digital board 2 and are converted into digital signals, which are then transmitted through optical fiber. The digital board 1 receives the digital signals, converts them into analog signals and transmits them to the power divider 2. The power divider 2 distributes the signals to the 400M and 450M amplification modules. After being amplified by the 400M and 450M amplification modules, the signals are transmitted to the station radio through the couplers.

[0055] In an embodiment, the 400M amplification module is configured to amplify signals in the 400M frequency band to compensate for signal attenuation during transmission and ensure that the signals have sufficient strength to meet the transmission requirements of subsequent links. Specifically, the 400M amplification module includes a radio frequency power amplifier. To ensure amplification effect and performance, a matching circuit is provided to ensure that the input and output impedances of the power amplifier are matched with the front and rear circuits to avoid signal reflection. A bias circuit is also provided to provide the power amplifier with appropriate operating voltage and current to operate at an appropriate operating point.

[0056] The 450M amplification module is configured to amplify signals in the 450M frequency band. The working principle of the 450M amplification module is the same as that of the 400M amplification module, except that the working frequency is set to the 450M frequency band. The circuit parameters, such as inductance and capacitance, are adjusted to adapt to the frequency characteristics of the 450M signal to achieve efficient power amplification.

[0057] In an embodiment, the power combiner one is configured to combine the downlink output signals of the 400M amplification module and the 450M amplification module to provide a digital board one with a combined signal containing the 400M and 450M frequency bands. Specifically, the power combiner one is usually implemented based on microstrip lines or lumped parameter circuits, and utilizes the characteristics of transmission lines to combine two signals of different frequencies through a specific structure (such as branch lines or coupled lines) to an output port.

[0058] The power combiner four is configured to combine the uplink signals output by the 400M integrated module and the 450M integrated module to provide a digital board two with a combined uplink signal containing the 400M and 450M frequency bands, so that the signal can be converted into a digital signal and transmitted back to the near-end machine. The power combiner four has the same implementation principle as the power combiner one.

[0059] The power divider three is configured to divide the downlink signal output by the digital board two into two paths to provide the 400M integrated module and the 450M integrated module, respectively, to achieve signal distribution so that signals of different frequency bands can be processed independently in subsequent modules. The power divider four is configured to divide the uplink signal output by the digital board one into two paths to be sent to the uplink input terminals of the 400M amplification module and the 450M amplification module, respectively, to perform subsequent uplink signal amplification and transmission. Specifically, the power divider three and the power divider four can also be implemented based on microstrip lines or lumped parameter circuits, and designed according to the power division ratio requirements to distribute the input signal power to multiple output ports according to a certain ratio.

[0060] In one embodiment, the digital board one mainly consists of an analog front end, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC) and a field programmable gate array (FPGA) unit. The analog front end pre-processes the input analog signal, including filtering, amplification and other operations; the ADC converts the analog signal into a digital signal; the FPGA can perform some digital signal processing on the digital signal, such as modulation, coding and other operations; and the DAC converts the received digital signal into an analog signal. The digital board two is similar to the digital board one and cooperates with the digital board one to complete the digital-to-analog conversion of the signal and the corresponding signal processing task.

[0061] In one embodiment, the 400M integrated module is used to filter and amplify the received downlink signal and then output. Specifically, the 400M integrated module includes a filter and an amplifier. First, the 400M signal is filtered out from the downlink signal by a band-pass filter, only allowing signals in the 400M frequency band to pass through, and then the signal is amplified by the amplifier to ensure the signal strength. The 450M integrated module is used to filter and amplify the received downlink signal and then output, which is similar to the implementation of the 400M integrated module, except that the circuit parameters are adjusted for the 450M frequency band, a 450M band-pass filter is used, and the working parameters of the amplifier and the parameters of other circuit components are adjusted according to the characteristics of the 450M frequency band.

[0062] In one embodiment, the multiplexer is used to multiplex and separate multiple frequency band signals. In downlink transmission, the 400M and 450M signals are combined together and transmitted by the antenna; in uplink transmission, the 400M and 450M signals received by the antenna are separated and transmitted to the 400M integrated module and the 450M integrated module, respectively. Specifically, the multiplexer can adopt a diplexer structure and be implemented by combining two band-pass filters of different frequencies and transmission lines. In the downlink direction, the signals of the two frequency bands are combined by the respective filters and connected to an output port of the antenna; in the uplink direction, the signals received by the antenna are separated by the filters and output to the respective frequency band output ports, ensuring effective separation and multiplexing of different frequency band signals.

[0063] Example 2

[0064] As Figure 2As shown, on the basis of the embodiment 1, the 400M integrated module is connected in series with the power divider three and the power divider five, the radio frequency switch one is connected in series between the power divider five and the multiplexer, the 450M integrated module is connected in series with the power divider three and the power divider six, the radio frequency switch two is connected in series between the power divider six and the multiplexer, the remote terminal machine further comprises a 400M integrated backup module, a 450M integrated backup module and a switch control module, two output ends of the power divider three are connected with input ends of the power divider five and the power divider six respectively, two output ends of the power divider five are connected with a downlink input end of the 400M integrated module and a downlink input end of the 400M integrated backup module respectively, a downlink output end of the 400M integrated module and a downlink output end of the 400M integrated backup module are connected with two input ends of the radio frequency switch one respectively, an output end of the radio frequency switch one is connected with a 400M input end of the multiplexer, two output ends of the power divider six are connected with a downlink input end of the 450M integrated module and a downlink input end of the 450M integrated backup module respectively, a downlink output end of the 450M integrated module and a downlink output end of the 450M integrated backup module are connected with two input ends of the radio frequency switch two respectively, an output end of the radio frequency switch two is connected with a 450M input end of the multiplexer, and the switch control module is used for switching the switch state of the radio frequency switch one and the radio frequency switch two.

[0065] In the embodiment, the transmission process of the downlink signal can be optimized as follows:

[0066] The signal output by the digital board two reaches the power divider three, and the power divider three divides the signal into two paths. For the 400M frequency band, the signal of the power divider three is transmitted to the power divider five, and the power divider five sends the signal to the downlink input ends of the 400M integrated module and the 400M integrated backup module respectively. The 400M integrated module and the 400M integrated backup module process the signal, and the processed signal is connected to two input ends of the radio frequency switch one. The switch control module controls the radio frequency switch one according to the system state, and selects the signal of the 400M integrated module or the 400M integrated backup module to be transmitted to the 400M input end of the multiplexer. For the 450M frequency band, the signal of the power divider three is transmitted to the power divider six, and the power divider six sends the signal to the downlink input ends of the 450M integrated module and the 450M integrated backup module respectively. The 450M integrated module and the 450M integrated backup module process the signal, and the processed signal is connected to two input ends of the radio frequency switch four. The switch control module controls the radio frequency switch two according to the system state, and selects the signal of the 450M integrated module or the 450M integrated backup module to be transmitted to the 450M input end of the multiplexer. The multiplexer transmits the final 400M and 450M signals through the antenna.

[0067] In one embodiment, the power divider five is used to divide the downlink signals output by the power divider three into two paths, which are transmitted to the downlink input terminals of the 400M integrated module and the 400M integrated backup module, respectively, so as to perform subsequent processing on the 400M frequency band signals or perform signal backup and switching processing of the backup module, thereby providing a signal redundancy and backup mechanism for the system, so that the 400M frequency band signals can have a backup processing path during transmission. The power divider six is used to divide the 450M frequency band signals output by the power divider three into two paths, which are transmitted to the downlink input terminals of the 450M integrated module and the 450M integrated backup module, respectively, thereby providing a backup processing path for the 450M frequency band signals.

[0068] In one embodiment, the radio frequency switch one is used to select and control the downlink signals output by the 400M integrated module and the 400M integrated backup module, and according to the instruction of the switch control module, one of the downlink signals is connected to the 400M input terminal of the multiplexer. This enables the system to switch between the normal 400M integrated module and the backup 400M integrated backup module, thereby improving the reliability and fault tolerance of the system. The radio frequency switch two is similar to the radio frequency switch one, and is used to select and control the downlink output signals of the 450M integrated module and the 450M integrated backup module, so as to switch between the normal 450M integrated module and the backup 450M integrated backup module, thereby ensuring the reliability of the 450M frequency band signal transmission.

[0069] In one embodiment, the 400M integrated backup module and the 450M integrated backup module serve as backup modules of the 400M integrated module and the 450M integrated module. When the main module fails or its performance decreases, the switch control module can switch the radio frequency switch to transfer the signal processing task to the backup module, so as to ensure that the processing function of the system for the 400M and 450M frequency band signals is not affected, thereby improving the reliability and stability of the system.

[0070] In one embodiment, the switch control module is used to control the switching state of the radio frequency switch one and the radio frequency switch two, and according to the state monitoring information of the system or a predetermined control strategy, it is determined whether to perform the module switching operation. Specifically, a microcontroller (such as ARMCortex-M series) or FPGA can be used to realize the control logic, and the performance indicators (such as signal strength, signal quality, module temperature, etc.) of the main module are monitored to determine whether to switch to the backup module.

[0071] Example 3

[0072] As Figures 3-4As shown, the existing optical fiber repeater mostly adopts star type networking or chain type networking mode, the star type networking needs one optical fiber for each remote machine, and needs to occupy more optical fiber resources along the railway, and with the development of railway intelligence, the optical fiber resources are more and more nervous, so the optical fiber repeater also requires to use less optical fiber resources. The chain type networking adopts short section optical fiber to connect between remote machines, only needs to divide one optical fiber resource into multiple sections to form ends respectively, and connects different remote machines, although the optical fiber resources are saved, but when one optical fiber is faulty, the subsequent remote machines cannot receive signals.

[0073] The embodiment improves the networking mode of the optical fiber repeater on the basis of the embodiments 1 and 2, adopts ring type networking, as shown in Figure 5 A plurality of remote machines include a head remote machine, a plurality of middle remote machines and a tail remote machine connected through optical fibers in sequence, the near end machine is connected with the head remote machine through an optical fiber, and the near end machine is connected with the tail remote machine through an optical fiber.

[0074] On the basis of the chain type networking, one loopback optical fiber is added, when any one optical fiber in the remote machine is disconnected, the near end machine can send signals in two directions, and can also ensure that the remote machines on the link can receive optical signals to ensure that the system functions normally. The ring type networking increases the redundancy backup of the system through the loopback optical fiber, thereby ensuring the reliability of the system.

[0075] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual-mode system of fiber optic repeater, comprising a near-end machine and a plurality of remote machines, characterized in that, The near-end machine comprises a 400M amplification module, a 450M amplification module, a power combiner one and a digital board one, the far-end machine comprises a digital board two, a power divider three, a 400M integrated module, a 450M integrated module and a multiplexer, the downlink input end of the 400M amplification module and the downlink input end of the 450M amplification module receive the downlink signal of the station radio station through couplers respectively, the downlink output end of the 400M amplification module and the downlink output end of the 450M amplification module are connected to the two input ends of the power combiner one respectively, the output end of the power combiner one is connected to the input end of the digital board one, the digital board one is connected to the digital board two through an optical fiber, the output end of the digital board two is connected to the input end of the power divider three, the two output ends of the power divider three are connected to the downlink input end of the 400M integrated module and the downlink input end of the 450M integrated module respectively, the downlink output end of the 400M integrated module is connected to the 400M input end of the multiplexer, the downlink output end of the 450M integrated module is connected to the 450M input end of the multiplexer, the 400M integrated module and the 450M integrated module are connected to the two input ends of the power combiner four through the uplink output end and the uplink output end respectively, the output end of the power combiner four is connected to the input end of the digital board two, the digital board two is connected to the digital board one through an optical fiber, the output end of the digital board one is connected to the input end of the power divider two, the two output ends of the power divider two are connected to the uplink input end of the 400M amplification module and the uplink input end of the 450M amplification module respectively, the uplink output end of the 400M amplification module and the uplink output end of the 450M amplification module are connected to the transmitting link of the station radio station through couplers respectively.

2. The dual-mode system of claim 1, wherein, The 400M integrated module and the power divider three are connected in series through a power divider five, and the multiplexer is connected in series through a radio frequency switch one, the 450M integrated module and the power divider three are connected in series through a power divider six, and the multiplexer is connected in series through a radio frequency switch two, the far-end machine further comprises a 400M integrated backup module, a 450M integrated backup module and a switch control module, 3. The dual-mode working system for an optical fiber repeater according to claim 2, characterized in that, ​ The two output ends of the power divider three are connected with the input ends of the power divider five and the power divider six respectively, the two output ends of the power divider five are connected with the downlink input end of the 400M integrated module and the downlink input end of the 400M integrated standby module respectively, the downlink output end of the 400M integrated module and the downlink output end of the 400M integrated standby module are connected with the two input ends of the radio frequency switch one respectively, the output end of the radio frequency switch one is connected with the 400M input end of the multiplexer, the two output ends of the power divider six are connected with the downlink input end of the 450M integrated module and the downlink input end of the 450M integrated standby module respectively, the downlink output end of the 450M integrated module and the downlink output end of the 450M integrated standby module are connected with the two input ends of the radio frequency switch two respectively, the output end of the radio frequency switch two is connected with the 450M input end of the multiplexer, and the switch control module is used for switching the switch state of the radio frequency switch one and the radio frequency switch two.

4. The dual-mode working system of the optical fiber repeater according to claim 1, characterized in that, the 400M amplification module is used for amplifying the signals of the 400M frequency band, and the 450M amplification module is used for amplifying the signals of the 450M frequency band; the power combiner one is used for combining the downlink signals output by the 400M amplification module and the 450M amplification module together to provide a digital board one with a combined downlink signal containing the 400M and 450M frequency bands; the digital board one is used for converting the downlink signal input by the power combiner one from an analog signal to a digital signal, and then modulating the digital signal to an optical carrier to transmit the digital signal to a digital board two through an optical fiber; the digital board two is used for receiving the downlink signal transmitted by the digital board one through the optical fiber, and converting the downlink signal from a digital signal to an analog signal to transmit the downlink signal to the power divider three again; the power divider three is used for dividing the downlink signal output by the digital board two into two paths to provide the 400M integrated module and the 450M integrated module respectively to realize signal distribution; the 400M integrated module is used for filtering and amplifying the received downlink signal and then outputting the downlink signal; the 450M integrated module is used for filtering and amplifying the received downlink signal and then outputting the downlink signal; the multiplexer is used for combining the downlink signals of the 400M frequency band and the 450M frequency band together to emit the downlink signals through an antenna.

5. The dual-mode working system of the optical fiber repeater according to claim 2, characterized in that, the power divider two is used for dividing the uplink signal output by the digital board one into two paths to provide the uplink input ends of the 400M amplification module and the 450M amplification module respectively; the digital board one is also used for receiving the uplink signal transmitted by the digital board two through the optical fiber, and converting the uplink signal from a digital signal to an analog signal to transmit the uplink signal to the power divider two again; the digital board two is also used for converting the uplink signal input by the power combiner four from an analog signal to a digital signal, and then modulating the digital signal to an optical carrier to transmit the digital signal to the digital board one through an optical fiber. The power combiner four is used for combining the uplink signals output by the 400M integrated module and the 450M integrated module, and providing a combined uplink signal containing the 400M and 450M frequency bands for the second digital board; The 400M integrated module is further used for receiving the 400M uplink signal output by the multiplexer, performing amplification processing, and outputting the signal to the power combiner four; The 450M integrated module is further used for receiving the 450M uplink signal output by the multiplexer, performing amplification processing, and outputting the signal to the power combiner four; The multiplexer is further used for separating the 400M frequency band uplink signal and the 450M frequency band uplink signal received from the antenna, and transmitting the signals to the 400M integrated module and the 450M integrated module respectively.

6. The dual-mode working system of the optical fiber repeater according to claim 3, characterized in that, The power divider five is used for dividing the downlink signal output by the power divider three into two paths, and transmitting the signals to the downlink input ends of the 400M integrated module and the 400M integrated standby module respectively; The power divider six is used for dividing the 450M frequency band signal output by the power divider three into two paths, and transmitting the signals to the downlink input ends of the 450M integrated module and the 450M integrated standby module respectively; The radio frequency switch one is used for selecting and controlling the downlink signals output by the 400M integrated module and the 400M integrated standby module, and connecting one of the downlink signals to the 400M input end of the multiplexer according to the instruction of the switch control module; The radio frequency switch two is used for selecting and controlling the downlink signals output by the 450M integrated module and the 450M integrated standby module, and connecting one of the downlink signals to the 450M input end of the multiplexer according to the instruction of the switch control module; The 400M integrated standby module is used for filtering and amplifying the received downlink signal and outputting the signal; The 450M integrated standby module is used for filtering and amplifying the received downlink signal and outputting the signal.

7. The dual-mode system of claim 1, wherein the optical fiber repeater is a remote optical fiber repeater. The plurality of remote machines include a head remote machine, a plurality of middle remote machines and a tail remote machine connected in sequence by optical fibers, the near-end machine is connected to the head remote machine by an optical fiber, and the near-end machine is connected to the tail remote machine by an optical fiber.

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