WO2020191725A1

WO2020191725A1 - Wireless communication method and system, and main unit and remote unit

Info

Publication number: WO2020191725A1
Application number: PCT/CN2019/080152
Authority: WO
Inventors: 王艳伟; 吕海平; 陈猛; 廖文贵; 赵自平
Original assignee: 华普特科技（深圳）股份有限公司
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-10-01
Also published as: CN113544982A; CN113544982B

Abstract

Disclosed are a wireless communication method and system, and a main unit and a remote unit. In the embodiments of the present application, a downlink intermediate-frequency signal with a preset power value is generated by means of a main unit; a downlink radio-frequency signal and the downlink intermediate-frequency signal are modulated into downlink optical signals, and the downlink optical signals are transmitted to a remote unit by means of an optical fiber; the downlink optical signals are received by means of the remote unit and are demodulated into the downlink radio-frequency signal and the downlink intermediate-frequency signal; a power value of the downlink intermediate-frequency signal is acquired; the magnitude of the power value of the downlink intermediate-frequency signal is compared with that of the preset power value; and when the difference value between the power value of the downlink intermediate-frequency signal and the preset power value is not within a preset power difference value range, link loss of the optical fiber is compensated for, so that the intensities of optical signals transmitted by the main unit to a plurality of remote units are the same and are not limited by different mounting distances between the remote units and the main unit and a connection difference between the optical fiber and a flange plate, thereby effectively reducing the mounting difficulty of a wireless communication system and improving the mounting efficiency.

Description

Wireless communication method, system, near-end machine and remote machine

Technical field

This application belongs to the field of communication technology, and in particular relates to a wireless communication method, system, near-end machine and remote machine.

Background technique

With the continuous development of communication technology, the coverage area of various communication networks continues to expand. A wireless communication system with a large network coverage area usually consists of a Main Unit (MU) and multiple Remote Units (RU). Optical signals are transmitted between the near-end and remote units through optical fibers. , The optical signal is converted from the radio frequency signal.

technical problem

When installing a wireless communication system, due to the difference in the installation distance between the remote and the near-end devices and the difference in the connection of the optical fiber flanges, the intensity of the optical signal transmitted from the near-end device to each remote-end device is different.

Technical solutions

This application provides a wireless communication method, a near-end machine and a remote machine, which can effectively compensate for the transmission loss between the remote machine and the near-end machine, so that the intensity of the optical signal transmitted from the near-end machine to multiple remote machines is the same .

The first aspect of the application provides a wireless communication method, which is applied to a remote machine, and the wireless communication method includes:

Receive the downstream optical signal transmitted by the near-end machine through the optical fiber and demodulate it into a downstream radio frequency signal and a downstream intermediate frequency signal;

Acquiring the power value of the downlink intermediate frequency signal;

Comparing the power value of the downlink intermediate frequency signal with a preset power value;

When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference range, compensate the link loss of the optical fiber;

Modulate the uplink radio frequency signal into an uplink optical signal and transmit it to the near-end machine through optical fiber;

Wherein, the near-end machine is used to generate a downlink intermediate frequency signal with a preset power value, and modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine through an optical fiber.

The second aspect of the present application provides a wireless communication method, which is applied to a near-end machine, and the wireless communication method includes:

Generate a downlink intermediate frequency signal with a preset power value;

Modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine through an optical fiber;

Receive the uplink optical signal transmitted by the remote machine through the optical fiber and demodulate it into an uplink radio frequency signal;

Wherein, the remote machine is used to obtain the power value of the downlink intermediate frequency signal;

When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference range, the link loss of the optical fiber is compensated.

The third aspect of the present application provides a remote machine, including a first main control module, a first data transmission module, a first laser component, and a first attenuator;

The first main control module is electrically connected to the first data transmission module and the first attenuator, and the first attenuator is also connected to the first data transmission module and the first laser assembly;

The first laser component is used to receive the downlink optical signal transmitted by the near-end machine through the optical fiber and demodulate it into a downlink radio frequency signal and a downlink intermediate frequency signal;

The first data transmission module is used to obtain the power value of the downlink intermediate frequency signal;

The first main control module is configured to: compare the power value of the downlink intermediate frequency signal with a preset power value;

When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the first power difference range, controlling the first attenuator to compensate for the link loss of the optical fiber;

The first laser component is also used to modulate the upstream radio frequency signal into an upstream optical signal and transmit it to the near-end machine through an optical fiber.

The fourth aspect of the present application provides a near-end machine, including a second main control module, a second data transmission module, and a second laser assembly;

The second main control module is electrically connected to the second data transmission module;

The second main control module is configured to control the second data transmission module to generate a downlink intermediate frequency signal with a preset power value;

The second laser assembly is used for:

Receive the uplink optical signal transmitted by the remote machine through the optical fiber and demodulate it into an uplink radio frequency signal, and output the uplink radio frequency signal to the second main control module.

The fifth aspect of the present application provides a wireless communication system, including:

A plurality of remote machines of the third aspect; and

A near-end machine of the above-mentioned fourth aspect, wherein the near-end machine is connected to the remote machine through an optical fiber.

Beneficial effect

In the embodiment of the application, a downstream intermediate frequency signal with a preset power value is generated by a near-end machine, the downstream radio frequency signal and the downstream intermediate frequency signal are modulated into a downstream optical signal and transmitted to the remote machine through an optical fiber, and the downstream optical signal is received and decoded by the remote machine. It is tuned to the downlink radio frequency signal and the downlink IF signal, the power value of the downlink IF signal is obtained, and the power value of the downlink IF signal is compared with the preset power value. When the power value of the downlink IF signal is between the preset power value When the difference is not within the preset power difference range, the link loss of the optical fiber is compensated, so that the intensity of the optical signal transmitted by the near-end machine to multiple remote machines is the same. The different installation distance and the limitation of the connection difference of the optical fiber flange effectively reduce the installation difficulty of the wireless communication system and improve the installation efficiency.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, for those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

FIG. 1 is a schematic diagram of the implementation process of the wireless communication method provided by Embodiment 1 of the present application;

2 is a schematic diagram of the implementation process of the wireless communication method provided in Embodiment 2 of the present application;

FIG. 3 is a schematic structural diagram of a remote machine provided in Embodiment 3 of the present application;

4 is a schematic structural diagram of a remote machine provided in Embodiment 4 of the present application;

FIG. 5 is a circuit schematic diagram of a remote machine provided in Embodiment 5 of the present application;

FIG. 6 is a schematic structural diagram of a remote machine provided in Embodiment 6 of the present application;

FIG. 7 is a circuit schematic diagram of a remote machine provided in Embodiment 7 of the present application;

FIG. 8 is a schematic structural diagram of a remote machine provided in Embodiment 8 of the present application;

FIG. 9 is a circuit schematic diagram of a remote machine provided in Embodiment 9 of the present application;

FIG. 10 is a schematic structural diagram of a near-end machine provided in Embodiment 10 of the present application;

FIG. 11 is a schematic structural diagram of a near-end machine provided in Embodiment 11 of the present application;

FIG. 12 is a circuit schematic diagram of a near-end machine provided in Embodiment 12 of the present application;

FIG. 13 is a schematic structural diagram of a near-end machine provided in Embodiment 13 of the present application;

FIG. 14 is a circuit schematic diagram of a near-end machine provided in Embodiment 14 of the present application;

FIG. 15 is a schematic structural diagram of a near-end machine provided in Embodiment 15 of the present application;

FIG. 16 is a circuit schematic diagram of a near-end machine provided in Embodiment 16 of the present application.

Embodiments of the invention

Example 1

This embodiment provides a wireless communication method, which is applied to a remote machine of a Multiservice Distributed Access System Solution (MDAS). As shown in Figure 1, the wireless communication method provided in this embodiment includes:

Step S101: Receive the downlink optical signal transmitted by the near-end machine through the optical fiber and demodulate it into a downlink radio frequency signal and a downlink intermediate frequency signal.

In application, the remote machine includes a first laser component, the first laser component includes a first laser receiving device, and the first laser receiving device may be a laser receiving diode (PD) with photoelectric conversion (O/E) function for The downstream optical signal is demodulated into a downstream radio frequency signal and a downstream intermediate frequency signal.

Step S102: Obtain the power value of the downlink intermediate frequency signal;

Step S103: comparing the power value of the downlink intermediate frequency signal with a preset power value;

Step S104: When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference range, compensate the link loss of the optical fiber.

In application, the near-end machine also includes a first main control module, a first data transmission module and a first attenuator.

The first main control module can be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (ASIC), Ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The first data transmission module may include a 433M receiving chip, which is used to receive the downlink intermediate frequency signal and detect the power value of the downlink intermediate frequency signal. The first main control module is used to compare the power value of the downlink intermediate frequency signal with the preset power value. When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference range, control The first attenuator compensates the link loss of the optical fiber. The preset power difference can be preset according to actual needs. The first attenuator may be a fiber optic attenuator (Fibre Optic Attenuator).

Step S105: The uplink radio frequency signal is modulated into an uplink optical signal and transmitted to the near-end machine through the optical fiber.

In application, the first laser assembly includes a first laser emitting device. The first laser emitting device may be a laser emitting diode (LD) with electro-optical conversion (E/O) function for modulating the upstream radio frequency signal into an upstream optical signal And transmitted to the near-end machine through optical fiber.

In this embodiment, the near-end machine is used to generate a downlink intermediate frequency signal with a preset power value, and modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine through an optical fiber. The near-end machine is used in a multi-service distribution system. A near-end machine communicates with multiple remote machines through optical fibers.

In application, the near-end machine includes a second main control module, a second data transmission module and a second laser assembly. The second main control module can be a central processing unit, or other general-purpose processors, digital signal processors, application specific integrated circuits, ready-made programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components Wait. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The second data transmission module may include a 433M transmitting chip for generating a downlink intermediate frequency signal of a preset power value with a preset power value. The downlink intermediate frequency signal is an intermediate frequency signal (Medium Frequency, MF) with a frequency ranging from 250 MHz to 450 MHz, for example, 433 MHz. The preset power value can be preset according to actual needs. The second laser assembly includes a second laser emitting device. The second laser emitting device may be a laser emitting diode with an electrical-optical conversion function, which is used to modulate the downstream radio frequency signal and the downstream intermediate frequency signal into a downstream optical signal and transmit it to the remote machine through an optical fiber. .

In this embodiment, the near-end machine generates a downlink intermediate frequency signal with a preset power value, modulates the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmits it to the remote machine through an optical fiber, and the remote machine receives and demodulates the downlink optical signal Obtain the power value of the downlink IF signal for the downlink radio frequency signal and the downlink IF signal, compare the power value of the downlink IF signal with the preset power value, when the difference between the power value of the downlink IF signal and the preset power value When the value is not within the preset power difference range, the link loss of the optical fiber is compensated, so that the intensity of the optical signal transmitted by the near-end machine to multiple remote machines is the same, regardless of the installation between each remote machine and the near-end machine The different distances and the limitation of the connection difference of the fiber optic flanges effectively reduce the installation difficulty of the wireless communication system and improve the installation efficiency.

In an embodiment, step S101 includes:

After the remote device is powered on, the downstream optical signal transmitted by the near-end device through the optical fiber is received and demodulated into a downstream radio frequency signal and a downstream intermediate frequency signal.

In one embodiment, after step S104, it includes: returning to step S101 for a preset number of times within a preset time period.

In application, after the near-end unit and the remote unit are connected and powered on respectively, the remote unit starts to detect the power value of the received downlink intermediate frequency signal and the preset power value, and connects the chain through the first attenuator The path loss is compensated. After the compensation is completed and the near-end machine and the remote machine are operating normally, steps S101 to S104 are repeated for a preset number of times within a preset time period to ensure the correct link loss compensation and the normal operation of the near-end machine and the remote machine. The preset time period and the preset number of times can be set in advance according to actual needs. For example, the preset time period can be set to any time within 5 minutes to 30 minutes, and the preset number of times can be set to 1, 2, or 3.

In one embodiment, the remote machine includes a first laser receiving device and a first indicator light;

Step S101 includes: receiving, through the first laser receiving device, a downstream optical signal transmitted by a near-end machine through an optical fiber and converting it into a first current signal, where the first current signal includes a downstream radio frequency signal and a downstream intermediate frequency signal;

The wireless communication method further includes:

Step S201: Obtain the output voltage of the first laser receiving device according to the first current signal;

Step S202: comparing the output voltage of the first laser receiving device with the first reference voltage;

Step S203: When the difference between the output voltage of the first laser receiving device and the first reference voltage is within the first voltage difference range, drive the first indicator light to light up;

Step S204: When the difference between the output voltage of the first laser receiving device and the first reference voltage is not within the first voltage difference range, drive the first indicator light to go out.

In application, the remote machine further includes a first feedback adjustment circuit, the first feedback adjustment circuit can be implemented by a voltage comparator, and the first feedback adjustment circuit is used to perform steps S201 to S204. Specifically, the first indicator light may be a light emitting diode. When the first indicator light is on, it indicates that the light intensity of the downstream optical signal received by the first laser receiving device is normal; when the first indicator light is off, it indicates that the light intensity of the downstream optical signal received by the first laser receiving device is weak. By setting the first indicator light, it is convenient to observe the light intensity of the downstream optical signal.

In one embodiment, the remote machine includes a first laser emitting device and a second laser receiving device;

Step S105 includes:

Step S301: According to the uplink radio frequency signal, the first laser emitting device is driven by the second current signal to emit the uplink optical signal and transmitted to the near-end machine through the optical fiber;

Step S302, monitoring the light intensity of the upstream optical signal through the second laser receiving device and converting it into a third current signal;

Step S303: Obtain the output voltage of the second laser receiving device according to the third current signal;

Step S304, comparing the output voltage of the second laser receiving device with the second reference voltage;

Step S305: When the difference between the output voltage of the second laser receiving device and the second reference voltage is not within the second voltage difference range, adjust the magnitude of the second current signal so that the second The difference between the output voltage of the laser receiving device and the second reference voltage is within the second voltage difference range.

In application, the remote machine further includes a second feedback adjustment circuit, the second feedback adjustment circuit can be implemented by a voltage comparator, and the second feedback adjustment circuit is used to perform steps S301 to S305. The second laser receiving device may be a laser receiving diode with a photoelectric conversion function. The second laser receiving device monitors the light intensity of the upstream optical signal emitted by the first laser device and converts it into a current signal, so that the power supply current of the first laser emitting device can be detected, and then the first laser is detected by the second feedback adjustment circuit. The feedback adjustment of the power supply current of the emitting device can ensure that the power supply current of the first laser emitting device is constant, so that the first laser emitting device works at the rated current.

In an embodiment, the remote machine further includes a second indicator light;

The wireless communication method further includes:

Step S401: Obtain the output voltage of the first laser emitting device according to the current signal output by the first laser emitting device;

Step S402, comparing the output voltage of the first laser emitting device with the third reference voltage;

Step S403: When the difference between the output voltage of the first laser emitting device and the third reference voltage is within the third voltage difference range, drive the second indicator light to light up;

Step S404: When the difference between the output voltage of the first laser emitting device and the third reference voltage is not within the third voltage difference range, drive the second indicator light to go out.

In application, the remote machine further includes a third feedback adjustment circuit, which can be implemented by a voltage comparator, and the third feedback adjustment circuit is used to perform steps S401 to S404. The second indicator light may specifically be a light emitting diode. When the second indicator light is on, it indicates that the light intensity of the upstream optical signal emitted by the first laser emitting device is normal, and the working state of the remote machine is normal; when the second indicator light is off, it indicates the upstream optical signal emitted by the first laser emitting device The light intensity is abnormal, and the working state of the first laser emitting device is abnormal. By setting the second indicator light, it is convenient to observe whether the first laser emitting device is working normally.

Example 2

This embodiment provides a wireless communication method, which is applied to a near-end machine of a multi-service distribution system. One near-end machine communicates with multiple remote machines through optical fiber. As shown in Figure 2, the wireless communication method provided in this embodiment includes:

Step S501: Generate a downlink intermediate frequency signal with a preset power value;

Step S502: modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine through optical fiber;

Step S503: Receive the uplink optical signal transmitted by the remote machine through the optical fiber and demodulate it into an uplink radio frequency signal.

In application, the near-end machine includes a second main control module, a second data transmission module and a second laser assembly. The second main control module can be a central processing unit, or other general-purpose processors, digital signal processors, application specific integrated circuits, ready-made programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components Wait. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The second data transmission module may include a 433M transmitting chip for generating a downlink intermediate frequency signal of a preset power value with a preset power value. The downlink intermediate frequency signal is an intermediate frequency signal with a frequency in the range of 250 MHz to 450 MHz, for example, 433 MHz. The preset power value can be preset according to actual needs. The second laser assembly includes a second laser emitting device. The second laser emitting device may be a laser emitting diode with an electrical-optical conversion function, which is used to modulate the downstream radio frequency signal and the downstream intermediate frequency signal into a downstream optical signal and transmit it to the remote machine through an optical fiber. .

In an embodiment, the proximal machine includes a second laser emitting device and a third laser receiving device;

Step S502 includes:

Step S601: According to the downlink radio frequency signal and the downlink intermediate frequency signal, the second laser emitting device is driven by the fourth current signal to emit the downlink optical signal and transmitted to the remote machine through the optical fiber;

Step S602: monitor the light intensity of the downstream optical signal through the third laser receiving device and convert it into a fifth current signal;

Step S603: Obtain the output voltage of the third laser receiving device according to the fifth current signal;

Step S604, comparing the output voltage of the third laser receiving device with the fourth reference voltage;

Step S605: When the difference between the output voltage of the third laser receiving device and the fourth reference voltage is not within the range of the fourth voltage difference, adjust the magnitude of the fourth current signal so that the third The difference between the output voltage of the laser receiving device and the fourth reference voltage is within the fourth voltage difference range.

In application, the near-end machine further includes a fourth feedback adjustment circuit, the fourth feedback adjustment circuit can be implemented by a voltage comparator, and the fourth feedback adjustment circuit is used to perform steps S601 to S605. The third laser receiving device may be a laser receiving diode with a photoelectric conversion function. The third laser receiving device monitors the light intensity of the downstream optical signal emitted by the second laser device and converts it into a current signal, so that the power supply current of the second laser emitting device can be detected, and then the second laser is controlled by the fourth feedback adjustment circuit. The feedback adjustment of the power supply current of the emitting device can ensure that the power supply current of the second laser emitting device is constant, and the second laser emitting device can work at the rated current.

In an embodiment, the near-end machine further includes a third indicator light;

The wireless communication method further includes:

Step S701: Obtain the output voltage of the second laser emitting device according to the current signal output by the second laser emitting device;

Step S702, comparing the output voltage of the second laser emitting device with the fifth reference voltage;

Step S703: When the difference between the output voltage of the second laser emitting device and the fifth reference voltage is within the fifth voltage difference range, drive the third indicator light to light up;

Step S704: When the difference between the output voltage of the second laser emitting device and the fifth reference voltage is not within the fifth voltage difference range, drive the third indicator light to go out.

In application, the near-end machine further includes a fifth feedback adjustment circuit, the fifth feedback adjustment circuit can be implemented by a voltage comparator, and the fifth feedback adjustment circuit is used to perform steps S701 to S704. The third indicator light may specifically be a light emitting diode. When the third indicator light is on, it indicates that the light intensity of the downstream optical signal emitted by the second laser emitting device is normal, and the working state of the near-end machine is normal; when the third indicator light is off, it indicates the downstream optical signal emitted by the second laser emitting device The light intensity is abnormal, and the working state of the second laser emitting device is abnormal. By setting the third indicator light, it is convenient to observe whether the second laser emitting device is working normally.

In an embodiment, the near-end machine includes a fourth laser receiving device and a fourth indicator light;

Step S503 includes: receiving the upstream optical signal transmitted by the remote machine through the optical fiber through the fourth laser receiving device and converting it into a sixth current signal, where the sixth current signal includes the upstream radio frequency signal;

The wireless communication method further includes:

Step S801: Obtain the output voltage of the fourth laser receiving device according to the sixth current signal;

Step S802, comparing the output voltage of the fourth laser receiving device with the magnitude of the sixth reference voltage;

Step S803: When the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is within the sixth voltage difference range, drive the fourth indicator light to light up;

Step S804: When the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is not within the sixth voltage difference range, drive the fourth indicator light to go out.

In application, the near-end machine further includes a sixth feedback adjustment circuit, the sixth feedback adjustment circuit can be implemented by a voltage comparator, and the sixth feedback adjustment circuit is used to perform steps S801 to S804. The fourth laser receiving device may be a laser receiving device with a photoelectric conversion function. The fourth indicator light may be a light emitting diode. When the fourth indicator light is on, it indicates that the light intensity of the upstream optical signal received by the fourth laser receiving device is normal, and the working state of the fourth laser receiving device is normal; when the fourth indicator light is off, it indicates that the fourth laser receiving device has received it. The light intensity of the upstream optical signal is weak. By setting the fourth indicator light, it is convenient to observe the light intensity of the upstream optical signal.

It should be understood that the size of the sequence number of each step in the foregoing embodiment does not mean the order of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

Example 3

As shown in FIG. 3, this embodiment provides a remote machine 1 for executing the method steps in Embodiment 1, including a first main control module 11, a first data transmission module 12, a first laser component 13, and a first Attenuator 14;

The first main control module 11 is electrically connected to the first data transmission module 12 and the first attenuator 14, and the first attenuator 14 is also connected to the first data transmission module 12 and the first laser assembly 13.

In this embodiment, the electrical connection refers to a connection for transmitting electrical signals through a cable, a data bus, or the like. The electrical signal can be a current signal, a voltage signal, or a pulse signal. Connection refers to the connection realized through coupling connection, butt connection, spiral connection, etc.

The first laser assembly 13 is used to receive the downstream optical signal transmitted by the near-end machine 2 through the optical fiber 3 and demodulate it into a downstream radio frequency signal and a downstream intermediate frequency signal.

In application, the first laser component may include a first laser receiving device, and the first laser receiving device may be a laser receiving diode with a photoelectric conversion function for demodulating the downstream optical signal into a downstream radio frequency signal and a downstream intermediate frequency signal.

The first data transmission module is used to obtain the power value of the downlink intermediate frequency signal.

In application, the first data transmission module may include a 433M receiving chip for receiving downlink intermediate frequency signals and detecting the power value of the downlink intermediate frequency signals.

The first main control module 11 is used for:

Compare the power value of the downlink intermediate frequency signal with the preset power value;

When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the first power difference range, control the first attenuator 14 to compensate for the link loss of the optical fiber 3;

The first laser component 13 is also used to modulate the upstream radio frequency signal into an upstream optical signal and transmit it to the near-end machine 2 through the optical fiber 3.

In application, the first main control module is mainly used to control the cooperative work of various components in the remote machine through a software control mechanism. The first main control module can be a central processing unit, or other general-purpose processors, digital signals Processors, application specific integrated circuits, ready-made programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The first attenuator may be an optical fiber attenuator. The first laser assembly may further include a first laser emitting device, and the first laser emitting device may be a laser emitting diode with an electrical-optical conversion function, which is used to modulate the upstream radio frequency signal into an upstream optical signal and transmit it to the near-end machine through an optical fiber.

In this embodiment, the first laser component receives the downlink optical signal transmitted by the near-end machine through the optical fiber and demodulates it into a downlink radio frequency signal and a downlink intermediate frequency signal. The power value of the downlink intermediate frequency signal is obtained through the first data transmission module, and the power value of the downlink intermediate frequency signal is obtained through the first master control. The module compares the power value of the downlink intermediate frequency signal with a preset power value, and when the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference range, controls the first attenuator Compensate the link loss of the optical fiber, so that the strength of the downstream optical signal received by each remote machine is the same, and is not limited by the difference in the installation distance between the remote machine and the near-end machine and the connection difference of the optical fiber flange. The installation difficulty of the wireless communication system is reduced, the installation efficiency is improved, and the structure of the remote machine is simple and easy to implement.

Example 4

As shown in FIG. 4, in this embodiment, the first laser assembly 13 in Embodiment 3 includes a first laser receiving device 131, a first feedback adjustment circuit 132, and a first indicator light 133;

The first feedback adjustment circuit 132 is electrically connected to the first laser receiving device 131 and the first indicator light 133.

The first laser receiving device 131 is configured to receive the downstream optical signal transmitted by the near-end machine 2 through the optical fiber 3 and convert it into a first current signal, the first current signal includes a downstream radio frequency signal and a downstream intermediate frequency signal;

The first feedback adjustment circuit 132 is used for:

Obtaining the output voltage of the first laser receiving device 131 according to the first current signal;

Comparing the output voltage of the first laser receiving device 131 with the first reference voltage;

When the difference between the output voltage of the first laser receiving device 131 and the first reference voltage is within the first voltage difference range, the first indicator light 133 is driven to light up; when the output voltage of the first laser receiving device 131 is When the difference of the reference voltage is not within the first voltage difference range, the first indicator light 133 is driven to go out.

In application, the first feedback regulation circuit can be implemented by a voltage comparator, and the first indicator light can be a light emitting diode.

In this embodiment, the downstream optical signal transmitted by the near-end machine through the optical fiber is received by the first laser receiving device and converted into the first current signal, and the output voltage of the first laser receiving device is obtained according to the first current signal through the first feedback adjustment circuit, and compared The output voltage of the first laser receiving device and the first reference voltage. When the difference between the output voltage of the first laser receiving device and the first reference voltage is within the first voltage difference range, the first indicator light is driven to light up When the difference between the output voltage of the first laser receiving device and the first reference voltage is not within the range of the first voltage difference, the first indicator light is driven to go out, which is convenient for observing the downstream optical signal through the on and off status of the first indicator light. brightness.

Example 5

As shown in FIG. 5, in this embodiment, the first feedback adjustment circuit 132 in the fourth embodiment includes a first voltage comparator A1, a first resistor R1, and a second resistor R2;

The negative input terminal of the first voltage comparator A1 is connected to the first reference voltage U _Ref1 ; the positive input terminal of the first voltage comparator A1 is electrically connected to the output terminal of the first laser receiving device 131 and one end of the first resistor R1, The other end of a resistor R1 is connected to the signal ground; the output end of the first voltage comparator A1 is electrically connected to one end of the second resistor R2, and the other end of the second resistor R2 is electrically connected to the input end of the first indicator light 133. The output terminal of the indicator light 133 is connected to the signal ground.

In this embodiment, the first laser receiving device 131 is a laser receiving diode D1, and the first indicator light 133 is a light emitting diode D2.

In application, the first reference voltage is provided by the mainboard power supply of the remote machine, and the size of the first reference voltage can be 5V. The first resistor is a voltage sampling resistor, and the second resistor is a voltage divider resistor.

In this embodiment, the output voltage of the first laser receiving device is sampled by the first resistor, and the first reference voltage is compared with the output voltage of the first laser receiving device through the first voltage comparator. When the output voltage of the first laser receiving device is When the difference of the first reference voltage is within the first voltage difference range, the first indicator is driven to light up, and when the difference between the output voltage of the first laser receiving device and the first reference voltage is not within the first voltage difference range When the first indicator light is turned off, it is convenient to observe the light intensity of the downstream optical signal through the on and off status of the first indicator light.

Example 6

In this embodiment, on the basis of any one of Embodiments 3 to 5, the first laser assembly 13 includes a second feedback adjustment circuit 134, a first laser emitting device 135, and a second laser receiving device 136. FIG. 6 exemplarily shows that on the basis of Embodiment 5, the first laser assembly 13 includes the second feedback adjustment circuit 134, the first laser emitting device 135, and the second laser receiving device 136.

As shown in FIG. 6, in this embodiment, the second feedback adjustment circuit 134 is electrically connected to the first laser emitting device 135 and the second laser receiving device 136;

The second feedback adjustment circuit 134 is configured to output a second current signal according to the uplink radio frequency signal to drive the first laser emitting device 135 to emit an uplink optical signal and transmit it to the near-end machine 2 through the optical fiber 3;

The second laser receiving device 136 is used to monitor the light intensity of the upstream optical signal and convert it into a third current signal;

The second feedback adjustment circuit 134 is also used for:

Obtain the output voltage of the second laser receiving device 136 according to the third current signal;

Comparing the output voltage of the second laser receiving device 136 with the second reference voltage;

When the difference between the output voltage of the second laser receiving device 136 and the second reference voltage is not within the second voltage difference range, the magnitude of the second current signal is adjusted to make the output voltage of the second laser receiving device 136 and the second The difference of the reference voltage is within the second voltage difference range.

In application, the second feedback adjustment circuit can be implemented by a voltage comparator, the first laser emitting device can be a laser emitting diode with electro-optical conversion function, and the second laser receiving device can be a laser receiving diode with photoelectric conversion function.

In this embodiment, according to the magnitude of the uplink radio frequency signal, the second feedback adjustment circuit outputs a second current signal to drive the first laser emitting device to transmit the uplink optical signal and transmit it to the near-end machine through the optical fiber, and monitor the uplink optical signal through the second laser receiving device The light intensity is converted into a third current signal, and the output voltage of the second laser receiving device is obtained according to the third current signal through the second feedback adjustment circuit, and the output voltage of the second laser receiving device is compared with the second reference voltage. When the difference between the output voltage of the second laser receiving device and the second reference voltage is not within the range of the second voltage difference, the magnitude of the second current signal is adjusted so that the output voltage of the second laser receiving device is less than the second reference voltage. The difference is within the second voltage difference range, which can ensure that the power supply current of the first laser emitting device is constant, and the first laser emitting device can work at the rated current.

Example 7

As shown in FIG. 7, in this embodiment, the second feedback adjustment circuit 134 in the sixth embodiment includes a second voltage comparator A2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. , The first transistor Q1 and the second transistor Q2;

The negative input terminal of the second voltage comparator A2 is connected to the second reference voltage U _Ref2 ; the positive input terminal of the second voltage comparator A2 is electrically connected to one end of the third resistor R3 and one end of the fourth resistor R4, and the third resistor R3 The other end of is electrically connected to the output end of the second laser receiving device 136; the output end of the second voltage comparator A2 and the other end of the fourth resistor R4, the input end of the first transistor Q1 and the controlled end of the second transistor Q2 Electrical connection

The output end of the first transistor Q1 and one end of the fifth resistor R5 are commonly connected to the signal ground; the controlled end of the first transistor Q1 is electrically connected to the other end of the fifth resistor R5 and the input end of the second transistor Q2;

The output end of the second transistor Q2 is electrically connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is electrically connected to the input end of the first laser emitting device 135, and the output end of the first laser emitting device 135 is connected to signal ground.

In this embodiment, the second laser receiving device 136 is a laser receiving diode D3, and the first laser emitting device 135 is a laser emitting diode D4.

In application, the second reference voltage is provided by the mainboard power supply of the remote machine, and the magnitude of the second reference voltage can be 5V. The third resistor is a voltage sampling resistor, the fourth resistor is a voltage dividing resistor, the fifth resistor is a pull-down resistor, and the sixth resistor is a voltage dividing resistor. The first transistor and the second transistor may be triodes or field effect transistors.

In this embodiment, according to the magnitude of the uplink radio frequency signal, the second voltage comparator is used to output a second current signal to drive the first laser emitting device to transmit the uplink optical signal and transmit it to the near-end machine through the optical fiber. The second laser receiving device monitors the uplink optical signal The light intensity is converted into a third current signal, the third current signal is sampled by the third resistor to obtain the output voltage of the second laser receiving device, and the second voltage comparator is used to compare the output voltage of the second laser receiving device with the second reference voltage When the difference between the output voltage of the second laser receiving device and the second reference voltage is not within the range of the second voltage difference, the second current signal is adjusted by the first transistor and the second transistor to make the second The difference between the output voltage of the laser receiving device and the second reference voltage is within the second voltage difference range, which can ensure that the power supply current of the first laser emitting device is constant and make the first laser emitting device work at the rated current.

Example 8

In this embodiment, on the basis of Embodiment 6 or 7, the first laser assembly 13 further includes a third feedback adjustment circuit 137 and a second indicator light 138. FIG. 8 exemplarily shows that the first laser assembly 13 further includes a third feedback adjustment circuit 137 and a second indicator light 138 on the basis of the sixth embodiment.

As shown in FIG. 8, in this embodiment, the third feedback adjustment circuit 137 is electrically connected to the first laser emitting device 135 and the second indicator light 138;

The third feedback adjustment circuit 137 is used for:

Obtaining the output voltage of the first laser emitting device 135 according to the current signal output by the first laser emitting device 135;

Comparing the output voltage of the first laser emitting device 135 with the third reference voltage;

When the difference between the output voltage of the first laser emitting device 135 and the third reference voltage is within the third voltage difference range, the second indicator light 138 is driven to light up; when the output voltage of the first laser emitting device 135 is When the difference of the reference voltage is not within the third voltage difference range, the second indicator light 138 is driven to go out.

In application, the third feedback regulation circuit can be implemented by a voltage comparator, and the second indicator light can be a light emitting diode.

In this embodiment, the third feedback adjustment circuit obtains the output voltage of the first laser emitting device according to the current signal output by the first laser emitting device, and compares the output voltage of the first laser emitting device with the third reference voltage. When the first laser When the difference between the output voltage of the emitting device and the third reference voltage is within the range of the third voltage difference, the second indicator light is driven to light up, and when the difference between the output voltage of the first laser emitting device and the third reference voltage is not in the first When the difference between the three voltages is within the range, the second indicator light is driven to go out, so that it is convenient to observe whether the first laser emitting device is working normally through the on and off conditions of the second indicator light.

Example 9

As shown in FIG. 9, in this embodiment, the third feedback adjustment circuit 137 in the embodiment 8 includes a third voltage comparator A3, a seventh resistor R7, and an eighth resistor R8;

The negative input terminal of the third voltage comparator A3 is connected to the third reference voltage U _Ref3 ; the positive input terminal of the third voltage comparator A3 is electrically connected to the output terminal of the first laser emitting device 135 and one end of the seventh resistor R7, The other end of the seventh resistor R7 is connected to the signal ground; the output end of the third voltage comparator A3 is electrically connected to one end of the eighth resistor R8, the other end of the eighth resistor R8 is electrically connected to the input end of the second indicator light 138, and the second The output terminal of the indicator light 138 is connected to the signal ground.

In this embodiment, the first laser emitting device 135 is a laser emitting diode D4, and the second indicator light 138 is a light emitting diode D5. The seventh resistor is a sampling resistor, and the eighth resistor is a voltage divider resistor.

In this embodiment, the output voltage of the first laser emitting device is sampled by the seventh resistor, and the output voltage of the first laser emitting device is compared with the third reference voltage by the third voltage comparator. When the output voltage of the first laser emitting device is When the difference of the third reference voltage is within the range of the third voltage difference, the second indicator is driven to light up, when the difference between the output voltage of the first laser emitting device and the third reference voltage is not within the range of the third voltage difference When the second indicator light is turned off, it is convenient to observe whether the first laser emitting device is working normally through the on and off conditions of the second indicator light.

Example 10

As shown in FIG. 10, this embodiment provides a near-end machine 2 for performing the method steps in Embodiment 2, including a second main control module 21, a second data transmission module 22, and a second laser assembly 23;

The second main control module 21 is electrically connected to the second data transmission module 22.

In this embodiment, the electrical connection refers to a connection for transmitting electrical signals through a cable, a data bus, or the like. The electrical signal can be a current signal, a voltage signal, or a pulse signal.

The second main control module 21 is configured to control the second data transmission module 22 to generate a downlink intermediate frequency signal with a preset power value.

In application, the second main control module is mainly used to control the cooperative work of various components in the near-end machine through a software control mechanism. The second main control module can be a central processing unit, or other general-purpose processors, digital signals Processors, application specific integrated circuits, ready-made programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The first attenuator may be an optical fiber attenuator. The first laser assembly also includes a first laser emitting device. The first laser emitting device may be a laser emitting diode with an electrical-optical conversion function, which is used to modulate the upstream radio frequency signal into an upstream optical signal and transmit it to the near-end machine through an optical fiber. The second data transmission module may include a 433M receiving chip for generating a downlink intermediate frequency signal with a preset power value.

The second laser assembly 23 is used for:

Modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine 1 through the optical fiber 3;

The uplink optical signal transmitted by the remote machine 1 through the optical fiber 3 is received and demodulated into an uplink radio frequency signal, and the uplink radio frequency signal is output to the second main control module 21.

In application, the first laser component may include a second laser emitting device and a third laser receiving device, and the second laser emitting device may be a laser emitting diode with an electrical-optical conversion function for modulating the downstream radio frequency signal and the downstream intermediate frequency signal into The downstream optical signal is transmitted to the near-end machine through an optical fiber; the third laser receiving device may be a laser receiving diode with a photoelectric conversion function, which is used to demodulate the upstream optical signal into an upstream radio frequency signal.

In this embodiment, the second data transmission module generates a downlink intermediate frequency signal with a preset power value, and the downlink radio frequency signal and the downlink intermediate frequency signal are modulated into a downlink optical signal through the second laser emission component and transmitted to the remote computer through the optical fiber to receive the remote The uplink optical signal transmitted by the machine through the optical fiber is demodulated into an uplink radio frequency signal, so that the near-end machine can demodulate the downlink optical signal into a downlink radio frequency signal and a downlink intermediate frequency signal, and according to the power value of the downlink intermediate frequency signal and the preset power value Control the first attenuator to compensate the link loss of the optical fiber, so that the strength of the downstream optical signal received by each remote unit is the same, regardless of the installation distance between the remote unit and the near-end unit and the fiber flange The limitation of the disc connection difference effectively reduces the installation difficulty of the wireless communication system and improves the installation efficiency, and the structure of the near-end machine is simple and easy to implement.

Example 11

As shown in FIG. 11, in this embodiment, the second laser assembly 23 in Embodiment 10 includes a fourth feedback adjustment circuit 231, a second laser emitting device 232, and a third laser receiving device 233;

The fourth feedback adjustment circuit 231 is electrically connected to the second laser emitting device 232 and the third laser receiving device 233;

The fourth feedback adjustment circuit 231 is configured to drive the second laser emitting device 232 to emit a downstream optical signal through the fourth current signal according to the downstream radio frequency signal and the downstream intermediate frequency signal, and transmit the downstream optical signal to the remote machine 1 through the optical fiber 3;

The third laser receiving device 233 is used to monitor the light intensity of the downstream optical signal and convert it into a fifth current signal;

The fourth feedback adjustment circuit 231 is also used for:

Obtain the output voltage of the third laser receiving device 233 according to the fifth current signal;

Comparing the output voltage of the third laser receiving device 233 with the magnitude of the fourth reference voltage;

When the difference between the output voltage of the third laser receiving device 233 and the fourth reference voltage is not within the range of the fourth voltage difference, the magnitude of the fourth current signal is adjusted so that the output voltage of the third laser receiving device 233 is equal to the fourth voltage difference. The difference of the reference voltage is within the fourth voltage difference range.

In application, the fourth feedback adjustment circuit can be implemented by a voltage comparator, the second laser emitting device can be a laser emitting diode with electro-optical conversion function, and the third laser receiving device can be a laser receiving diode with photoelectric conversion function.

In this embodiment, according to the magnitude of the downlink radio frequency signal and the downlink intermediate frequency signal, the fourth feedback adjustment circuit outputs a fourth current signal to drive the second laser emitting device to emit a downlink optical signal, which is transmitted to the remote machine through an optical fiber, and is transmitted through the third laser receiving device Monitor the light intensity of the downstream optical signal and convert it into a fifth current signal, obtain the output voltage of the third laser receiving device according to the fifth current signal through the fourth feedback adjustment circuit, and compare the output voltage of the third laser receiving device with the fourth reference voltage When the difference between the output voltage of the third laser receiving device and the fourth reference voltage is not within the range of the fourth voltage difference, the magnitude of the fourth current signal is adjusted so that the output voltage of the third laser receiving device is the same as the first The difference of the four reference voltages is within the range of the fourth voltage difference, which can ensure that the power supply current of the second laser emitting device is constant, so that the second laser emitting device works at the rated current.

Example 12

As shown in FIG. 12, in this embodiment, the fourth feedback adjustment circuit 231 in the embodiment 11 includes a fourth voltage comparator A4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a twelfth resistor R11. Resistor R12, third transistor Q3 and fourth transistor Q4;

The negative input terminal of the fourth voltage comparator A4 is connected to the fourth reference voltage U _Ref4 ; the positive input terminal of the fourth voltage comparator A4 is electrically connected to one end of the ninth resistor R9 and one end of the tenth resistor R10, and the ninth resistor R9 The other end of is electrically connected to the output end of the third laser receiving device 233; the output end of the fourth voltage comparator A4 and the other end of the tenth resistor R10, the input end of the third transistor Q3 and the controlled end of the fourth transistor Q4 Electrical connection

The output end of the third transistor Q3 and one end of the eleventh resistor R11 are commonly connected to the signal ground; the controlled end of the third transistor Q3 is electrically connected to the other end of the eleventh resistor R11 and the input end of the fourth transistor Q4;

The output end of the fourth transistor Q4 is electrically connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is electrically connected to the input end of the second laser emitting device 232, and the output end of the second laser emitting device 232 is connected to the signal Ground.

In this embodiment, the second laser emitting device 232 is a laser emitting diode D6, and the third laser receiving device 233 is a laser receiving diode D7.

In application, the fourth reference voltage is provided by the mainboard power supply of the near-end machine, and the size of the fourth reference voltage may be 5V. The ninth resistor is a voltage sampling resistor, the tenth resistor is a voltage dividing resistor, the eleventh resistor is a pull-down resistor, and the twelfth resistor is a voltage dividing resistor. The third transistor and the fourth transistor may be triodes or field effect transistors.

In this embodiment, according to the magnitude of the downlink radio frequency signal and the downlink intermediate frequency signal, the fourth voltage comparator is used to output a fourth current signal to drive the second laser emitting device to emit a downlink optical signal, which is transmitted to the remote machine through an optical fiber, and is transmitted through the third laser receiving device Monitor the light intensity of the downstream optical signal and convert it into a fifth current signal, sample the fifth current signal through the ninth resistor to obtain the output voltage of the third laser receiving device, and compare the output voltage of the third laser receiving device with the fourth voltage comparator The magnitude of the fourth reference voltage, when the difference between the output voltage of the third laser receiving device and the fourth reference voltage is not within the range of the fourth voltage difference, the magnitude of the fourth current signal is adjusted through the third transistor and the fourth transistor, In order to make the difference between the output voltage of the third laser receiving device and the fourth reference voltage within the fourth voltage difference range, the power supply current of the second laser emitting device can be ensured to be constant, and the second laser emitting device can work at the rated current .

Example 13

In this embodiment, the second laser assembly 23 in Embodiment 11 or Embodiment 12 further includes a fifth feedback adjustment circuit 234 and a third indicator light 235. FIG. 13 exemplarily shows that on the basis of Embodiment 11, the second laser assembly 23 further includes a fifth feedback adjustment circuit 234 and a third indicator light 235.

As shown in FIG. 13, in this embodiment, the fifth feedback adjustment circuit 234 is electrically connected to the second laser emitting device 232 and the third indicator light 235;

The fifth feedback adjustment circuit 234 is used for:

Obtaining the output voltage of the second laser emitting device 232 according to the current signal output by the second laser emitting device 232;

Comparing the output voltage of the second laser emitting device 232 with the magnitude of the fifth reference voltage;

When the difference between the output voltage of the second laser emitting device 232 and the fifth reference voltage is within the fifth voltage difference range, the third indicator light 235 is driven to light up; when the output voltage of the second laser emitting device 232 is When the difference of the reference voltage is not within the fifth voltage difference range, the third indicator light 235 is driven to go out.

In application, the fifth feedback regulation circuit can be implemented by a voltage comparator, and the third indicator light can be a light emitting diode.

In this embodiment, the fifth feedback adjustment circuit obtains the output voltage of the second laser emitting device according to the current signal output by the second laser emitting device, and compares the output voltage of the second laser emitting device with the fifth reference voltage. When the second laser When the difference between the output voltage of the emitting device and the fifth reference voltage is within the range of the fifth voltage difference, the third indicator is driven to light up. When the difference between the output voltage of the second laser emitting device and the fifth reference voltage is not in the first When the voltage difference is within the range of the voltage difference, the third indicator light is driven to go out, so that it is convenient to observe whether the second laser emitting device is working normally through the on and off conditions of the third indicator light.

Example 14

As shown in FIG. 14, in this embodiment, the fifth feedback adjustment circuit 234 in the embodiment 13 includes a fifth voltage comparator A5, a thirteenth resistor R13, and a fourteenth resistor R14;

The negative input terminal of the fifth voltage comparator A5 is connected to the fifth reference voltage U _Ref5 ; the positive input terminal of the fifth voltage comparator A5 is electrically connected to the output terminal of the second laser emitting device 232 and one end of the thirteenth resistor R13, The other end of the thirteenth resistor R13 is connected to signal ground; the output end of the fifth voltage comparator A5 is electrically connected to one end of the fourteenth resistor R14, and the other end of the fourteenth resistor R14 is electrically connected to the input end of the third indicator light 235. Connected, the output terminal of the third indicator light 235 is connected to the signal ground.

In this embodiment, the second laser emitting device 232 is a laser emitting diode D6, the third indicator light 235 is a light emitting diode D8, the thirteenth resistor is a sampling resistor, and the fourteenth resistor is a voltage dividing resistor.

In this embodiment, the output voltage of the second laser emitting device is sampled by the thirteenth resistor, and the output voltage of the second laser emitting device is compared with the fifth reference voltage by the fifth voltage comparator. When the output voltage of the second laser emitting device is When the difference between the fifth reference voltage and the fifth reference voltage is within the fifth voltage difference range, the third indicator is driven to light up, and when the difference between the output voltage of the second laser emitting device and the fifth reference voltage is not within the fifth voltage difference range When it is inside, the third indicator light is driven to go out, so that it is convenient to observe whether the second laser emitting device is working normally through the on and off of the third indicator light.

Example 15

In this embodiment, on the basis of any one of Embodiments 10 to 14, the second laser assembly 23 includes a fourth laser receiving device 236, a sixth feedback adjustment circuit 237, and a fourth indicator light 238. FIG. 15 exemplarily shows that on the basis of Embodiment 13, the second laser assembly 23 includes a fourth laser receiving device 236, a sixth feedback adjustment circuit 237, and a fourth indicator light 238.

As shown in FIG. 15, in this embodiment, the sixth feedback adjustment circuit 237 is electrically connected to the fourth laser receiving device 236 and the fourth indicator light 238;

The fourth laser receiving device 236 is configured to receive the upstream optical signal transmitted by the remote machine 1 through the optical fiber 3 and convert it into a sixth current signal, the sixth current signal including the upstream radio frequency signal;

The sixth feedback adjustment circuit 237 is used for:

Obtain the output voltage of the fourth laser receiving device 236 according to the sixth current signal;

Comparing the output voltage of the fourth laser receiving device 236 with the magnitude of the sixth reference voltage;

When the difference between the output voltage of the fourth laser receiving device 236 and the sixth reference voltage is within the range of the sixth voltage difference, the fourth indicator light 238 is driven to light up; when the output voltage of the fourth laser receiving device 236 is When the difference of the reference voltage is not within the range of the sixth voltage difference, the fourth indicator light 238 is driven to go out.

In application, the sixth feedback regulation circuit can be implemented by a voltage comparator, and the fourth indicator light can be a light emitting diode.

In this embodiment, the fourth laser receiving device receives the upstream optical signal transmitted by the remote machine through the optical fiber and converts it into a sixth current signal, and obtains the output voltage of the fourth laser receiving device according to the sixth current signal through the sixth feedback adjustment circuit. The magnitude of the output voltage of the fourth laser receiving device and the sixth reference voltage. When the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is within the range of the sixth voltage difference, the fourth indicator light is driven to light up When the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is not within the range of the sixth voltage difference, the fourth indicator light is driven to go out, which is convenient for observing the upward light signal through the on and off of the fourth indicator light. brightness.

Example 16

As shown in FIG. 16, in this embodiment, the sixth feedback adjustment circuit 237 in the fifteenth embodiment includes a sixth voltage comparator A6, a fifteenth resistor R15, and a sixteenth resistor R16;

The negative input terminal of the sixth voltage comparator A6 is connected to the sixth reference voltage U _Ref6 ; the positive input terminal of the sixth voltage comparator A6 is electrically connected to the output terminal of the fourth laser receiving device 236 and one end of the fifteenth resistor R15, The other end of the fifteenth resistor R15 is connected to signal ground; the output end of the sixth voltage comparator A6 is electrically connected to one end of the sixteenth resistor R16, and the other end of the sixteenth resistor R16 is electrically connected to the input end of the fourth indicator light 238. Connected, the output terminal of the fourth indicator light 238 is connected to signal ground.

In this embodiment, the fourth laser receiving device 236 is a laser receiving diode D9, and the fourth indicator light 238 is a light emitting diode D10.

In application, the sixth reference voltage is provided by the mainboard power supply of the near-end computer, and the magnitude of the sixth reference voltage may be 5V. The fifteenth resistor is a voltage sampling resistor, and the sixteenth resistor is a voltage divider resistor.

In this embodiment, the output voltage of the fourth laser receiving device is sampled through the fifteenth resistor, and the sixth reference voltage is compared with the output voltage of the fourth laser receiving device through the sixth voltage comparator. When the output voltage of the fourth laser receiving device is When the difference between the sixth reference voltage and the sixth reference voltage is within the sixth voltage difference range, the fourth indicator light is driven to light up, and when the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is not within the sixth voltage difference range When it is inside, the fourth indicator light is driven to go out, which is convenient for observing the light intensity of the upstream optical signal through the on and off of the fourth indicator light.

Example 17

This embodiment provides a wireless communication system, including:

The remote machine in any one of Embodiments 3-9; and

In the near-end machine in any one of Embodiments 10 to 16, the near-end machine is connected to the far-end machine through an optical fiber.

In the application, the number of remote machines can be set according to actual needs.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail or recorded in an embodiment, reference may be made to related descriptions of other embodiments. The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still implement the foregoing The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in Within the scope of protection of this application.

Claims

A wireless communication method, characterized in that it is applied to a remote machine, and the wireless communication method includes:

Receive the downstream optical signal transmitted by the near-end machine through the optical fiber and demodulate it into a downstream radio frequency signal and a downstream intermediate frequency signal;

Acquiring the power value of the downlink intermediate frequency signal;

Comparing the power value of the downlink intermediate frequency signal with a preset power value;

When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference range, compensating the link loss of the optical fiber;

Modulate the uplink radio frequency signal into an uplink optical signal and transmit it to the near-end machine through optical fiber;

Wherein, the near-end machine is used to generate a downlink intermediate frequency signal with a preset power value, and modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine through an optical fiber.
The wireless communication method according to claim 1, wherein the remote machine comprises a first laser receiving device and a first indicator light;

Receive the downlink optical signal transmitted by the near-end machine through the optical fiber and demodulate it into a downlink radio frequency signal and a downlink intermediate frequency signal, including:

Receiving, by the first laser receiving device, a downstream optical signal transmitted by the near-end machine through an optical fiber and converting it into a first current signal, where the first current signal includes a downstream radio frequency signal and a downstream intermediate frequency signal;

The wireless communication method further includes:

Obtaining the output voltage of the first laser receiving device according to the first current signal;

Comparing the output voltage of the first laser receiving device with the first reference voltage;

Driving the first indicator light to light up when the difference between the output voltage of the first laser receiving device and the first reference voltage is within the first voltage difference range;

When the difference between the output voltage of the first laser receiving device and the first reference voltage is not within the first voltage difference range, the first indicator light is driven to go out.
The wireless communication method according to claim 1, wherein the remote machine comprises a first laser emitting device and a second laser receiving device;

The upstream radio frequency signal is modulated into an upstream optical signal and transmitted to the remote machine via optical fiber, including:

According to the upstream radio frequency signal, the first laser emitting device is driven by the second current signal to emit the upstream optical signal and transmitted to the near-end machine through the optical fiber;

Monitoring the light intensity of the upstream optical signal by the second laser receiving device and converting it into a third current signal;

Obtaining the output voltage of the second laser receiving device according to the third current signal;

Comparing the output voltage of the second laser receiving device with the second reference voltage;

When the difference between the output voltage of the second laser receiving device and the second reference voltage is not within the second voltage difference range, the magnitude of the second current signal is adjusted so that the second laser receiving device The difference between the output voltage and the second reference voltage is within the second voltage difference range.
The wireless communication method according to claim 3, wherein the remote machine further comprises a second indicator light;

The wireless communication method further includes:

Obtaining the output voltage of the first laser emitting device according to the current signal output by the first laser emitting device;

Comparing the output voltage of the first laser emitting device with the third reference voltage;

When the difference between the output voltage of the first laser emitting device and the third reference voltage is within the third voltage difference range, driving the second indicator light to light up;

When the difference between the output voltage of the first laser emitting device and the third reference voltage is not within the third voltage difference range, the second indicator light is driven to go out.
A wireless communication method, characterized in that it is applied to a near-end machine, and the wireless communication method includes:

Generate a downlink intermediate frequency signal with a preset power value;

Modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine through an optical fiber;

Receive the uplink optical signal transmitted by the remote machine through the optical fiber and demodulate it into an uplink radio frequency signal;

Wherein, the remote machine is used to obtain the power value of the downlink intermediate frequency signal;

Comparing the power value of the downlink intermediate frequency signal with a preset power value;

When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference range, the link loss of the optical fiber is compensated.
The wireless communication method according to claim 5, wherein the near-end machine includes a second laser emitting device and a third laser receiving device;

Modulating the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmitting it to the remote machine via optical fiber includes:

According to the downstream radio frequency signal and the downstream intermediate frequency signal, the second laser emitting device is driven by a fourth current signal to emit a downstream optical signal and transmitted to the remote machine through an optical fiber;

Monitoring the light intensity of the downstream optical signal by the third laser receiving device and converting it into a fifth current signal;

Obtaining the output voltage of the third laser receiving device according to the fifth current signal;

Comparing the output voltage of the third laser receiving device with the magnitude of the fourth reference voltage;

When the difference between the output voltage of the third laser receiving device and the fourth reference voltage is not within the range of the fourth voltage difference, the magnitude of the fourth current signal is adjusted so that the third laser receiving device The difference between the output voltage and the fourth reference voltage is within the fourth voltage difference range.
The wireless communication method according to claim 6, wherein the near-end machine further comprises a third indicator light;

The wireless communication method further includes:

Obtaining the output voltage of the second laser emitting device according to the current signal output by the second laser emitting device;

Comparing the output voltage of the second laser emitting device with the magnitude of the fifth reference voltage;

When the difference between the output voltage of the second laser emitting device and the fifth reference voltage is within the fifth voltage difference range, driving the third indicator light to light up;

When the difference between the output voltage of the second laser emitting device and the fifth reference voltage is not within the fifth voltage difference range, the third indicator light is driven to go out.
The wireless communication method according to claim 5, wherein the near-end machine comprises a fourth laser receiving device and a fourth indicator light;

Receive the uplink optical signal transmitted by the remote machine through the optical fiber and demodulate it into the uplink radio frequency signal, including:

Receiving, by the fourth laser receiving device, an upstream optical signal transmitted by a remote machine through an optical fiber and converting it into a sixth current signal, where the sixth current signal includes an upstream radio frequency signal;

The wireless communication method further includes:

Obtaining the output voltage of the fourth laser receiving device according to the sixth current signal;

Comparing the output voltage of the fourth laser receiving device with the magnitude of the sixth reference voltage;

Driving the fourth indicator light to light up when the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is within the sixth voltage difference range;

When the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is not within the range of the sixth voltage difference, the fourth indicator light is driven to go out.
A remote machine, characterized by comprising a first main control module, a first data transmission module, a first laser component and a first attenuator;

The first main control module is electrically connected to the first data transmission module and the first attenuator, and the first attenuator is also connected to the first data transmission module and the first laser assembly;

The first laser component is used to receive the downlink optical signal transmitted by the near-end machine through the optical fiber and demodulate it into a downlink radio frequency signal and a downlink intermediate frequency signal;

The first data transmission module is used to obtain the power value of the downlink intermediate frequency signal;

The first main control module is used for:

Comparing the power value of the downlink intermediate frequency signal with a preset power value;

When the difference between the power value of the downlink intermediate frequency signal and the preset power value is not within the first power difference range, controlling the first attenuator to compensate for the link loss of the optical fiber;

The first laser component is also used to modulate the upstream radio frequency signal into an upstream optical signal and transmit it to the near-end machine through an optical fiber.
The remote device of claim 9, wherein the first laser component comprises a first laser receiving device, a first feedback adjustment circuit and a first indicator light;

The first feedback adjustment circuit is electrically connected to the first laser receiving device and the first indicator light;

The first laser receiving device is configured to receive the downstream optical signal transmitted by the near-end machine through the optical fiber and convert it into a first current signal, and the first current signal includes a downstream radio frequency signal and a downstream intermediate frequency signal;

The first feedback adjustment circuit is used for:

Obtaining the output voltage of the first laser receiving device according to the first current signal;

Comparing the output voltage of the first laser receiving device with the first reference voltage;

Driving the first indicator light to light up when the difference between the output voltage of the first laser receiving device and the first reference voltage is within the first voltage difference range;

When the difference between the output voltage of the first laser receiving device and the first reference voltage is not within the first voltage difference range, the first indicator light is driven to go out.
The remote device according to claim 10, wherein the first feedback adjustment circuit comprises a first voltage comparator, a first resistor, and a second resistor;

The negative input terminal of the first voltage comparator is connected to the first reference voltage;

The positive input terminal of the first voltage comparator is electrically connected to the output terminal of the first laser receiving device and one end of the first resistor, and the other end of the first resistor is connected to signal ground;

The output terminal of the first voltage comparator is electrically connected to one end of the second resistor, the other end of the second resistor is electrically connected to the input terminal of the first indicator light, and the output of the first indicator light Terminate the signal ground.
The remote device according to claim 9, wherein the first laser component comprises a second feedback adjustment circuit, a first laser emitting device and a second laser receiving device;

The second feedback adjustment circuit is electrically connected to the first laser emitting device and the second laser receiving device;

The second feedback adjustment circuit is configured to output a second current signal according to the uplink radio frequency signal to drive the first laser emitting device to emit an uplink optical signal and transmit it to the near-end machine through an optical fiber;

The second laser receiving device is used to monitor the light intensity of the upstream optical signal and convert it into a third current signal;

The second feedback adjustment circuit is also used for:

Obtaining the output voltage of the second laser receiving device according to the third current signal;

Comparing the output voltage of the second laser receiving device with the second reference voltage;

When the difference between the output voltage of the second laser receiving device and the second reference voltage is not within the second voltage difference range, the magnitude of the second current signal is adjusted so that the second laser receiving device The difference between the output voltage and the second reference voltage is within the second voltage difference range.
The remote device according to claim 12, wherein the second feedback adjustment circuit comprises a second voltage comparator, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first transistor, and a second voltage comparator. Two transistors

The negative input terminal of the second voltage comparator is connected to the second reference voltage;

The positive input end of the second voltage comparator is electrically connected to one end of the third resistor and one end of the fourth resistor, and the other end of the third resistor is electrically connected to the output end of the second laser receiving device;

The output terminal of the second voltage comparator is electrically connected to the other terminal of the fourth resistor, the input terminal of the first transistor, and the controlled terminal of the second transistor;

The output terminal of the first transistor and one end of the fifth resistor are commonly connected to signal ground;

The controlled end of the first transistor is electrically connected to the other end of the fifth resistor and the input end of the second transistor;

The output end of the second transistor is electrically connected to one end of the sixth resistor, the other end of the sixth resistor is electrically connected to the input end of the first laser emitting device, and the output of the first laser emitting device Terminate the signal ground.
The remote device according to claim 12 or 13, wherein the first laser component further comprises a third feedback adjustment circuit and a second indicator light;

The third feedback adjustment circuit is electrically connected to the first laser emitting device and the second indicator light;

The third feedback adjustment circuit is used for:

Obtaining the output voltage of the first laser emitting device according to the current signal output by the first laser emitting device;

Comparing the output voltage of the first laser emitting device with the third reference voltage;

When the difference between the output voltage of the first laser emitting device and the third reference voltage is within the third voltage difference range, driving the second indicator light to light up;

When the difference between the output voltage of the first laser emitting device and the third reference voltage is not within the third voltage difference range, the second indicator light is driven to go out.
The remote device according to claim 14, wherein the third feedback adjustment circuit comprises a third voltage comparator, a seventh resistor, and an eighth resistor;

The negative input terminal of the third voltage comparator is connected to the third reference voltage;

The positive input terminal of the third voltage comparator is electrically connected to the output terminal of the first laser emitting device and one end of the seventh resistor, and the other end of the seventh resistor is connected to signal ground;

The output terminal of the third voltage comparator is electrically connected to one end of the eighth resistor, the other end of the eighth resistor is electrically connected to the input end of the second indicator light, and the output of the second indicator light Terminate the signal ground.
A near-end machine, characterized by comprising a second main control module, a second data transmission module and a second laser assembly;

The second main control module is electrically connected to the second data transmission module;

The second main control module is configured to control the second data transmission module to generate a downlink intermediate frequency signal with a preset power value;

The second laser assembly is used for:

Modulate the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmit it to the remote machine through an optical fiber;

Receive the uplink optical signal transmitted by the remote machine through the optical fiber and demodulate it into an uplink radio frequency signal, and output the uplink radio frequency signal to the second main control module.
The near-end machine according to claim 16, wherein the second laser component comprises a fourth feedback adjustment circuit, a second laser emitting device, and a third laser receiving device;

The fourth feedback adjustment circuit is electrically connected to the second laser emitting device and the third laser receiving device;

The fourth feedback adjustment circuit is used to drive the second laser emitting device to emit a downlink optical signal through a fourth current signal according to the downlink radio frequency signal and the downlink intermediate frequency signal, and transmit the downlink optical signal to the remote machine through an optical fiber;

The third laser receiving device is used to monitor the light intensity of the downstream optical signal and convert it into a fifth current signal;

The fourth feedback adjustment circuit is also used for:

Obtaining the output voltage of the third laser receiving device according to the fifth current signal;

Comparing the output voltage of the third laser receiving device with the magnitude of the fourth reference voltage;

When the difference between the output voltage of the third laser receiving device and the fourth reference voltage is not within the fourth voltage difference range, the magnitude of the fourth current signal is adjusted so that the third laser receiving device The difference between the output voltage and the fourth reference voltage is within the fourth voltage difference range.
The near-end machine according to claim 17, wherein the second laser assembly further comprises a fifth feedback adjustment circuit and a third indicator light;

The fifth feedback adjustment circuit is electrically connected to the second laser emitting device and the third indicator light;

The fifth feedback adjustment circuit is used for:

Obtaining the output voltage of the second laser emitting device according to the current signal output by the second laser emitting device;

Comparing the output voltage of the second laser emitting device with the magnitude of the fifth reference voltage;

When the difference between the output voltage of the second laser emitting device and the fifth reference voltage is within the fifth voltage difference range, driving the third indicator light to light up;

When the difference between the output voltage of the second laser emitting device and the fifth reference voltage is not within the fifth voltage difference range, the third indicator light is driven to go out.
The near-end machine according to claim 16, wherein the second laser assembly comprises a fourth laser receiving device, a sixth feedback adjustment circuit and a fourth indicator light;

The sixth feedback adjustment circuit is electrically connected to the fourth laser receiving device and the fourth indicator light;

The fourth laser receiving device is configured to receive an uplink optical signal transmitted by a remote machine through an optical fiber and convert it into a sixth current signal, where the sixth current signal includes an uplink radio frequency signal;

The sixth feedback adjustment circuit is used for:

Obtaining the output voltage of the fourth laser receiving device according to the sixth current signal;

Comparing the output voltage of the fourth laser receiving device with the magnitude of the sixth reference voltage;

Driving the fourth indicator light to light up when the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is within the sixth voltage difference range;

When the difference between the output voltage of the fourth laser receiving device and the sixth reference voltage is not within the range of the sixth voltage difference, the fourth indicator light is driven to go out.
A wireless communication system is characterized in that it comprises:

A plurality of remote machines as claimed in claims 9-15; and

A near-end machine as claimed in claims 16-19, wherein the near-end machine is connected to the remote machine through an optical fiber.