CN113544982B

CN113544982B - Wireless communication method, system, near-end machine and far-end machine

Info

Publication number: CN113544982B
Application number: CN201980093609.9A
Authority: CN
Inventors: 王艳伟; 廖文贵
Original assignee: SHENZHEN HUAPTEC CO Ltd
Current assignee: SHENZHEN HUAPTEC CO Ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2024-05-10
Anticipated expiration: 2039-03-28
Also published as: WO2020191725A1; CN113544982A

Abstract

The embodiment of the application discloses a wireless communication method, a system, a near-end machine and a far-end machine, wherein the near-end machine is used for generating a downlink intermediate frequency signal with a preset power value, modulating the downlink intermediate frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to the far-end machine through an optical fiber, receiving the downlink optical signal through the far-end machine and demodulating the downlink optical signal into the downlink radio frequency signal and the downlink intermediate frequency signal to obtain the power value of the downlink intermediate frequency signal, comparing the power value of the downlink intermediate frequency signal with the preset power value, and compensating the link loss of the optical fiber when the difference value between the power value of the downlink intermediate frequency signal and the preset power value is not in the preset power difference value range, so that the intensity of the optical signals transmitted to a plurality of the far-end machines by the near-end machine is the same and is not limited by the difference of installation distances between the far-end machines and the near-end machines and the connection difference of optical fiber flanges, thereby effectively reducing the installation difficulty of a wireless communication system and improving the installation efficiency.

Description

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

Technical Field

The present application relates to the field of communications technologies, and in particular, to a wireless communication method, a wireless communication system, a near-end machine, and a far-end machine.

Background

With the continuous development of communication technology, the coverage area of various communication networks is expanding. A wireless communication system with a large network coverage area is generally composed of a near-end Unit (Main Unit, MU) and a plurality of Remote Units (RU), wherein optical signals are transmitted between the near-end Unit and the Remote units through optical fibers, and the optical signals are converted from radio frequency signals.

When the wireless communication system is installed, the intensity of the optical signal transmitted from the near-end machine to each far-end machine is different due to the difference of the installation distance between the far-end machine and the near-end machine and the connection difference of the optical fiber flanges.

Disclosure of Invention

The application provides a wireless communication method, a near-end machine and a far-end machine, which can effectively compensate transmission loss between the far-end machine and the near-end machine, so that the intensity of optical signals transmitted to a plurality of far-end machines by the near-end machine is the same.

A first aspect of the present application provides a wireless communication method applied to a remote machine, the wireless communication method including:

Receiving a downlink optical signal transmitted by a near-end machine through an optical fiber and demodulating the downlink optical signal into a downlink radio frequency signal and a downlink intermediate frequency signal;

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

modulating an uplink radio frequency signal into an uplink optical signal and transmitting the uplink optical signal to a near-end machine through an optical fiber;

The near-end machine is used for generating a downlink intermediate frequency signal with a preset power value, modulating the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to the far-end machine through an optical fiber.

A second aspect of the present application provides a wireless communication method applied to a near-end machine, the wireless communication method including:

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

modulating the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to a remote machine through an optical fiber;

receiving an uplink optical signal transmitted by a remote terminal through an optical fiber and demodulating the uplink optical signal into an uplink radio frequency signal;

the remote terminal is used for acquiring the power value of the downlink intermediate frequency signal;

and when the difference value between the power value of the downlink intermediate frequency signal and the preset power value is not in the preset power difference value range, compensating the link loss of the optical fiber.

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 with the first data transmission module and the first attenuator, and the first attenuator is also connected with the first data transmission module and the first laser component;

the first laser component is used for receiving a downlink optical signal transmitted by the near-end machine through the optical fiber and demodulating the downlink optical signal into a downlink radio frequency signal and a downlink intermediate frequency signal;

the first data transmission module is used for acquiring 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 value between the power value of the downlink intermediate frequency signal and the preset power value is not in the first power difference value range, controlling a first attenuator to compensate the link loss of the optical fiber;

the first laser component is also used for modulating an uplink radio frequency signal into an uplink optical signal and transmitting the uplink optical signal 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 component;

the second main control module is electrically connected with the second data transmission module;

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

the second laser assembly is for:

And receiving an uplink optical signal transmitted by the remote terminal through the optical fiber, demodulating the uplink optical signal into an uplink radio frequency signal, and outputting the uplink radio frequency signal to the second main control module.

A fifth aspect of the present application provides a wireless communication system comprising:

A plurality of remote machines of the third aspect; and

A proximal machine according to the fourth aspect, wherein the proximal machine is connected to the distal machine through an optical fiber.

The embodiment of the application generates the downlink intermediate frequency signal with the preset power value through the near-end machine, modulates the downlink radio frequency signal and the downlink intermediate frequency signal into the downlink optical signal and transmits the downlink optical signal to the far-end machine through the optical fiber, receives the downlink optical signal through the far-end machine and demodulates the downlink optical signal into the downlink radio frequency signal and the downlink intermediate frequency signal, acquires the power value of the downlink intermediate frequency signal, compares the power value of the downlink intermediate frequency signal with the preset power value, compensates the link loss of the optical fiber when the difference value between the power value of the downlink intermediate frequency signal and the preset power value is not in the preset power difference value range, ensures that the intensity of the optical signals transmitted to a plurality of far-end machines by the near-end machine is the same and is not limited by the difference of the installation distance between each far-end machine and the near-end machine and the connection difference of the optical fiber flanges, effectively reduces the installation difficulty of a wireless communication system and improves the installation efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of an implementation of a wireless communication method according to embodiment 1 of the present application;

Fig. 2 is a schematic flow chart of an implementation of the wireless communication method provided in embodiment 2 of the present application;

Fig. 3 is a schematic structural diagram of a remote machine according to embodiment 3 of the present application;

Fig. 4 is a schematic structural diagram of a remote machine according to embodiment 4 of the present application;

Fig. 5 is a schematic circuit diagram of a remote machine according to embodiment 5 of the present application;

fig. 6 is a schematic structural diagram of a remote machine according to embodiment 6 of the present application;

Fig. 7 is a schematic circuit diagram of a remote machine according to embodiment 7 of the present application;

fig. 8 is a schematic structural diagram of a remote machine according to embodiment 8 of the present application;

Fig. 9 is a schematic circuit diagram of a remote machine according to embodiment 9 of the present application;

FIG. 10 is a schematic view of the structure of the proximal machine according to embodiment 10 of the present application;

FIG. 11 is a schematic view of the structure of a proximal machine according to embodiment 11 of the present application;

FIG. 12 is a schematic circuit diagram of a near-end machine according to embodiment 12 of the present application;

FIG. 13 is a schematic view of the structure of the proximal machine according to embodiment 13 of the present application;

FIG. 14 is a schematic circuit diagram of a near-end machine according to embodiment 14 of the present application;

FIG. 15 is a schematic view of the structure of a proximal machine according to embodiment 15 of the present application;

Fig. 16 is a schematic circuit diagram of a near-end machine according to embodiment 16 of the present application.

Detailed Description

Example 1

The embodiment provides a wireless communication method applied to a remote machine of a multi-service distribution system (Multiservice Distributed ACCESS SYSTEM Solution, MDAS). As shown in fig. 1, the wireless communication method provided in this embodiment includes:

Step S101, receiving a downlink optical signal transmitted by the near-end machine through an optical fiber and demodulating the downlink optical signal into a downlink radio frequency signal and a downlink intermediate frequency signal.

In application, the remote machine comprises a first laser assembly, the first laser assembly comprises a first laser receiving device, and the first laser receiving device can be a laser receiving diode (PD) with a photoelectric conversion (O/E) function and is used for demodulating a downlink optical signal into a downlink radio frequency signal and a downlink intermediate frequency signal.

Step S102, obtaining 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 value between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference value range, compensating the link loss of the optical fiber.

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

The first host module may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), off-the-shelf Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The first data transmission module may include a 433M receiving chip for receiving the downstream intermediate frequency signal and detecting a power value of the downstream 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, and controlling the first attenuator to compensate the link loss of the optical fiber when the difference value between the power value of the downlink intermediate frequency signal and the preset power value is not within the preset power difference value range. The preset power difference value can be preset according to actual needs. The first attenuator may be a fiber optic attenuator (Fibre Optic Attenuator).

Step 105, 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, which may be a laser emitting diode (LD) with an electro-optic conversion (E/O) function, for modulating an upstream radio frequency signal into an upstream optical signal and transmitting the upstream optical signal to the near-end machine via an optical fiber.

In this embodiment, the near-end machine is configured to 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 the downlink optical signal to the far-end machine through an optical fiber. The near-end machine is applied to the multi-service distribution system, and one near-end machine is in communication connection with a plurality of far-end machines through optical fibers.

In application, the near-end machine comprises a second main control module, a second data transmission module and a second laser component. The second main control module may be a central processing unit, and may also be other general purpose processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may 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 of the preset power value. The downstream intermediate Frequency signal is an intermediate Frequency signal (MF) having a Frequency in the range of 250MHz to 450MHz, for example, 433MHz. The preset power value can be preset according to actual needs. The second laser assembly comprises a second laser emitting device, and the second laser emitting device can be a laser emitting diode with an electro-optical conversion function and is used for modulating a downlink radio frequency signal and a downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to the remote machine through an optical fiber.

In the embodiment, the near-end machine generates the downlink intermediate frequency signal with the preset power value, modulates the downlink radio frequency signal and the downlink intermediate frequency signal into the downlink optical signal and transmits the downlink optical signal to the far-end machine through the optical fiber, receives the downlink optical signal through the far-end machine and demodulates the downlink optical signal into the downlink radio frequency signal and the downlink intermediate frequency signal, acquires the power value of the downlink intermediate frequency signal, compares the power value of the downlink intermediate frequency signal with the preset power value, and compensates the link loss of the optical fiber when the difference value between the power value of the downlink intermediate frequency signal and the preset power value is not in the preset power difference value range, so that the intensity of the optical signals transmitted to the far-end machines by the near-end machine is the same and is not limited by the difference of the installation distances between the far-end machines and the near-end machines and the connection difference of the optical fiber flanges, thereby effectively reducing the installation difficulty of the wireless communication system and improving the installation efficiency.

In one embodiment, step S101 includes:

after the remote terminal is electrified, the downlink optical signals transmitted by the near-end machine through the optical fiber are received and demodulated into downlink radio frequency signals and downlink intermediate frequency signals.

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

In application, after the near-end machine and the far-end machine are connected and are powered on respectively, the far-end machine starts to detect the power value of the received downlink intermediate frequency signal and the preset power value, and the link loss is compensated through the first attenuator. After the compensation is completed and the near-end machine and the far-end machine normally operate, the steps S101-S104 are repeatedly executed for preset times within a preset time period, so that the link loss compensation is ensured to be correct, and the near-end machine and the far-end machine are ensured to normally operate. The preset time period and the preset number of times may be preset according to actual needs, for example, the preset time period may be set to any time within 5 minutes to 30 minutes, and the preset number of times may be set to 1,2, or 3 times.

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

The step S101 includes: the method comprises the steps that a first laser receiving device receives a downlink optical signal transmitted by a near-end machine through an optical fiber and converts the downlink optical signal into a first current signal, wherein the first current signal comprises a downlink radio frequency signal and a downlink intermediate frequency signal;

The wireless communication method further includes:

step S201, obtaining 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 a first reference voltage;

Step 203, when the difference between the output voltage of the first laser receiving device and the first reference voltage is within a first voltage difference range, driving the first indicator lamp to light;

and step S204, when the difference value between the output voltage of the first laser receiving device and the first reference voltage is not in the first voltage difference value range, driving the first indicator lamp to be turned off.

In application, the remote machine further comprises a first feedback adjustment circuit, which may be implemented by a voltage comparator, for executing steps S201 to S204. The first indicator light may specifically be a light emitting diode. When the first indicator lamp is lightened, the first indicator lamp indicates that the light intensity of the downlink light signal received by the first laser receiving device is normal; when the first indicator light is turned off, the first indicator light indicates that the light intensity of the downlink light signal received by the first laser receiving device is weak. By arranging the first indicator lamp, the light intensity of the downlink light signal can be conveniently observed.

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

Step S105 includes:

step S301, driving the first laser emitting device to emit an uplink optical signal through a second current signal according to the uplink radio frequency signal and transmitting the uplink optical signal to a near-end machine through an optical fiber;

step S302, monitoring the light intensity of the uplink light signal through the second laser receiving device and converting the light intensity into a third current signal;

Step S303, obtaining 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 a second reference voltage;

and step 305, 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, adjusting the magnitude of the second current signal so that the difference between the output voltage of the second laser receiving device and the second reference voltage is within the second voltage difference range.

In application, the remote machine further comprises a second feedback adjustment circuit, which may be implemented by a voltage comparator, and is configured to perform steps S301 to S305. The second laser receiving device may be a laser receiving diode having a photoelectric conversion function. The second laser receiving device monitors the light intensity of the uplink light signal emitted by the first laser device and converts the light intensity into a current signal, so that the detection of the power supply current of the first laser emitting device can be realized, and then the second feedback regulating circuit is used for carrying out feedback regulation on the power supply current of the first laser emitting device, so that the power supply current of the first laser emitting device can be ensured to be constant, and the first laser emitting device works under rated current.

In one embodiment, the remote machine further comprises a second indicator light;

The wireless communication method further includes:

step S401, obtaining 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 a third reference voltage;

step S403, when the difference value between the output voltage of the first laser emitting device and the third reference voltage is within a third voltage difference value range, driving the second indicator lamp to light;

and step S404, when the difference value between the output voltage of the first laser emitting device and the third reference voltage is not in the third voltage difference value range, driving the second indicator lamp to be turned off.

In application, the remote machine further comprises a third feedback regulation circuit, which may be implemented by a voltage comparator, for executing steps S401 to S404. The second indicator light may be a light emitting diode. When the second indicator lamp is lightened, the light intensity of the uplink light 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 turned off, the light intensity of the uplink light signal emitted by the first laser emitting device is abnormal, and the working state of the first laser emitting device is abnormal. Through setting up the second pilot lamp, be convenient for observe whether first laser emission device normally works.

Example 2

The embodiment provides a wireless communication method which is applied to a near-end machine of a multi-service distribution system. A near-end machine is in communication connection with a plurality of far-end machines through optical fibers. As shown in fig. 2, the wireless communication method provided in this embodiment includes:

Step S501, generating a downlink intermediate frequency signal with a preset power value;

step S502, modulating the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to a remote terminal through an optical fiber;

step S503, the uplink optical signal transmitted by the remote terminal through the optical fiber is received and demodulated into an uplink radio frequency signal.

In application, the near-end machine comprises a second main control module, a second data transmission module and a second laser component. The second main control module may be a central processing unit, and may also be other general purpose processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may 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 of the preset power value. The downstream intermediate frequency signal is an intermediate frequency signal having a frequency in the range of 250MHz to 450MHz, for example, 433MHz. The preset power value can be preset according to actual needs. The second laser assembly comprises a second laser emitting device, and the second laser emitting device can be a laser emitting diode with an electro-optical conversion function and is used for modulating a downlink radio frequency signal and a downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to the remote machine through an optical fiber.

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

Step S502 includes:

Step S601, driving the second laser emitting device to emit a downlink optical signal through a fourth current signal according to a downlink radio frequency signal and the downlink intermediate frequency signal, and transmitting the downlink optical signal to a remote terminal through an optical fiber;

Step S602, monitoring the light intensity of the downlink optical signal by the third laser receiving device and converting the light intensity into a fifth current signal;

Step S603, obtaining an 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 a 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 fourth voltage difference range, adjusts the magnitude of the fourth current signal so that the difference between the output voltage of the third laser receiving device and the fourth reference voltage is within the fourth voltage difference range.

In application, the near-end machine further comprises a fourth feedback regulation circuit, which may be implemented by a voltage comparator, for performing steps S601-S605. The third laser receiving device may be a laser receiving diode having a photoelectric conversion function. The third laser receiving device monitors the light intensity of the downlink light signal emitted by the second laser device and converts the light intensity into a current signal, so that the detection of the power supply current of the second laser emitting device can be realized, and then the fourth feedback regulating circuit is used for carrying out feedback regulation on the power supply current of the second laser emitting device, so that the power supply current of the second laser emitting device can be ensured to be constant, and the second laser emitting device works under rated current.

In one embodiment, the proximal machine further comprises a third indicator light;

The wireless communication method further includes:

step S701, obtaining 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 a 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, driving the third indicator lamp to light;

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, the third indicator lamp is driven to be turned off.

In application, the near-end machine further comprises a fifth feedback regulation circuit, which may be implemented by a voltage comparator, for executing steps S701-S704. The third indicator light may be a light emitting diode. When the third indicator lamp is lighted, the light intensity of the downlink light 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 turned off, the light intensity of the downlink light signal emitted by the second laser emitting device is abnormal, and the working state of the second laser emitting device is abnormal. By arranging the third indicator lamp, whether the second laser emitting device works normally or not can be conveniently observed.

In one embodiment, the proximal machine includes a fourth laser receiving device and a fourth indicator light;

step S503 includes: the fourth laser receiving device receives an uplink optical signal transmitted by the remote terminal through the optical fiber and converts the uplink optical signal into a sixth current signal, wherein the sixth current signal comprises an uplink radio frequency signal;

The wireless communication method further includes:

Step S801, obtaining an 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 a 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, driving the fourth indicator lamp to light;

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, the fourth indicator lamp is driven to be turned off.

In application, the near-end machine further comprises a sixth feedback adjustment circuit, which may be implemented by a voltage comparator, for performing steps S801 to S804. The fourth laser light receiving device may be a laser light receiving device having a photoelectric conversion function. The fourth indicator light may be a light emitting diode. When the fourth indicator lamp is lighted, the light intensity of the uplink light 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 turned off, the fourth indicator light indicates that the light intensity of the uplink light signal received by the fourth laser receiving device is weak. By arranging the fourth indicator lamp, the light intensity of the uplink light signal can be conveniently observed.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.

Example 3

As shown in fig. 3, the present embodiment provides a remote machine 1 for performing the method steps in embodiment 1, including a first main control module 11, a first data transmission module 12, a first laser assembly 13 and a first attenuator 14;

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

In the present embodiment, the electrical connection refers to a connection for transmitting an electrical signal realized by a cable line, a data bus, or the like. The electrical signal may be a current signal, a voltage signal, a pulse signal, or the like. The connection means connection realized by means of coupling connection, involution connection, screw connection and the like.

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

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

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

In an application, the first data transmission module may include a 433M receiving chip, configured to receive the downstream intermediate frequency signal and detect a power value of the downstream intermediate frequency signal.

The first main control module 11 is used for:

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

The first laser assembly 13 is also used to modulate an upstream rf signal into an upstream optical signal and transmit the upstream optical signal to the near-end machine 2 via the optical fiber 3.

In application, the first main control module is mainly used for controlling each component in the remote machine to work cooperatively through a software control mechanism, and the first main control module can be a central processing unit, other general processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The first attenuator may be a fiber optic attenuator. The first laser assembly may further include a first laser emitting device, which may be a laser emitting diode with an electro-optical conversion function, for modulating an uplink radio frequency signal into an uplink optical signal and transmitting the uplink optical signal to the proximal machine through an optical fiber.

In the embodiment, the first laser component receives the downlink optical signal transmitted by the near-end machine through the optical fiber and demodulates the downlink optical signal into the downlink radio frequency signal and the downlink intermediate frequency signal, the first data transmission module is used for obtaining 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 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 in the preset power difference value range, the first attenuator is controlled to compensate the link loss of the optical fiber, so that the strength of the downlink optical signal received by each far-end machine is the same and is not limited by the difference of the installation distance between the far-end machine and the near-end machine and the connection difference of the optical fiber flange, the installation difficulty of a wireless communication system is effectively reduced, the installation efficiency is improved, and the far-end machine has a simple structure and is easy to realize.

Example 4

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

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

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

The first feedback adjustment circuit 132 is configured to:

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

comparing the magnitude of the output voltage of the first laser receiving device 131 with the magnitude of 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 lamp 133 is driven to be lighted; when the difference between the output voltage of the first laser receiving device 131 and the first reference voltage is not within the first voltage difference range, the first indicating lamp 133 is driven to be turned off.

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

According to the embodiment, the first laser receiving device receives a downlink optical signal transmitted by the near-end machine through the optical fiber and converts the downlink optical signal into a first current signal, the first feedback adjusting circuit obtains the output voltage of the first laser receiving device according to the first current signal, the output voltage of the first laser receiving device is compared with the first reference voltage, when the difference value of the output voltage of the first laser receiving device and the first reference voltage is within a first voltage difference value range, the first indicator lamp is driven to be on, and when the difference value of the output voltage of the first laser receiving device and the first reference voltage is not within the first voltage difference value range, the first indicator lamp is driven to be off, so that the light intensity of the downlink optical signal can be observed through the on-off condition of the first indicator lamp.

Example 5

As shown in fig. 5, in the present embodiment, the first feedback adjustment circuit 132 in embodiment 4 includes a first voltage comparator A1, a first resistor R1, and a second resistor R2;

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

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

In application, the first reference voltage is provided by a motherboard power supply of the remote machine, and the magnitude of the first reference voltage may be 5V. The first resistor is a voltage sampling resistor, and the second resistor is a voltage dividing resistor.

In this embodiment, the output voltage of the first laser receiving device is sampled through the first resistor, the first voltage comparator compares the first reference voltage with the output voltage of the first laser receiving device, when the difference value 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 lamp is driven to be turned on, and when the difference value 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 lamp is driven to be turned off, so that the light intensity of the downlink light signal can be observed through the on-off condition of the first indicator lamp.

Example 6

In this embodiment, 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 on the basis of any one of embodiments 3 to 5. Fig. 6 exemplarily shows a case where 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 on the basis of embodiment 5.

As shown in fig. 6, in the present embodiment, the second feedback adjustment circuit 134 is electrically connected to the first laser light emitting device 135 and the second laser light 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 the uplink optical signal to the near-end machine 2 through the optical fiber 3;

The second laser receiving device 136 is configured to monitor the light intensity of the uplink light signal and convert the light intensity into a third current signal;

The second feedback conditioning circuit 134 is also configured to:

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

comparing the magnitude of the output voltage of the second laser receiving device 136 with the magnitude of 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 so that the difference between the output voltage of the second laser receiving device 136 and the second reference voltage is within the second voltage difference range.

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

According to the embodiment, the second feedback adjusting circuit outputs a second current signal to drive the first laser emitting device to emit an uplink light signal according to the size of the uplink radio frequency signal and transmit the uplink light signal to the near-end machine through the optical fiber, the second laser receiving device monitors the light intensity of the uplink light signal and converts the uplink light signal into a third current signal, the second feedback adjusting circuit obtains the output voltage of the second laser receiving device according to the third current signal, the output voltage of the second laser receiving device is compared with the size of a second reference voltage, and when the difference value of the output voltage of the second laser receiving device and the second reference voltage is not in the second voltage difference value range, the size of the second current signal is adjusted to enable the difference value of the output voltage of the second laser receiving device and the second reference voltage to be in the second voltage difference value range, so that the power supply current of the first laser emitting device can be ensured to be constant, and the first laser emitting device can work under rated current.

Example 7

As shown in fig. 7, in the present embodiment, the second feedback adjustment circuit 134 in embodiment 6 includes a second voltage comparator A2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first transistor Q1, and a second transistor Q2;

The negative input end of the second voltage comparator A2 is connected with a second reference voltage U _Ref2; the positive input end of the second voltage comparator A2 is electrically connected with one end of a third resistor R3 and one end of a fourth resistor R4, and the other end of the third resistor R3 is electrically connected with the output end of the second laser receiving device 136; the output end of the second voltage comparator A2 is electrically connected with 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;

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 with the other end of the fifth resistor R5 and the input end of the second transistor Q2;

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

In the present 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 motherboard power supply of the remote machine, and the magnitude of the second reference voltage may 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 transistors or field effect transistors.

According to the embodiment, the second voltage comparator is used for outputting a second current signal to drive the first laser emitting device to emit an uplink light signal according to the size of the uplink radio frequency signal and transmitting the uplink light signal to the near-end machine through the optical fiber, the second laser receiving device is used for monitoring the light intensity of the uplink light signal and converting the uplink light signal into a third current signal, the third current signal is sampled through the third resistor to obtain the output voltage of the second laser receiving device, the second voltage comparator is used for comparing the output voltage of the second laser receiving device with the second reference voltage, and when the difference value of the output voltage of the second laser receiving device and the second reference voltage is not in the second voltage difference value range, the first transistor and the second transistor are used for adjusting the size of the second current signal, so that the difference value of the output voltage of the second laser receiving device and the second reference voltage is in the second voltage difference value range, the constant power supply current of the first laser emitting device can be ensured, and the first laser emitting device can work under rated current.

Example 8

In this embodiment, the first laser assembly 13 further includes a third feedback adjustment circuit 137 and a second indicator lamp 138 on the basis of embodiment 6 or 7. Fig. 8 exemplarily shows a case where the first laser assembly 13 further includes a third feedback adjustment circuit 137 and a second indicator lamp 138 on the basis of embodiment 6.

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

the third feedback adjustment circuit 137 is configured to:

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

comparing the magnitudes of the output voltage of the first laser emitting device 135 and 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 lamp 138 is driven to light; when the difference between the output voltage of the first laser emitting device 135 and the third reference voltage is not within the third voltage difference range, the second indicator lamp 138 is driven to be turned off.

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

According to the embodiment, the output voltage of the first laser emitting device is obtained through the third feedback adjusting circuit according to the current signal output by the first laser emitting device, the output voltage of the first laser emitting device is compared with the third reference voltage, when the difference value of the output voltage of the first laser emitting device and the third reference voltage is within the third voltage difference value range, the second indicating lamp is driven to be on, and when the difference value of the output voltage of the first laser emitting device and the third reference voltage is not within the third voltage difference value range, the second indicating lamp is driven to be off, so that whether the first laser emitting device works normally or not can be observed through the on-off condition of the second indicating lamp.

Example 9

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

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

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

In this embodiment, the output voltage of the first laser emitting device is sampled through the seventh resistor, the output voltage of the first laser emitting device is compared with the third reference voltage through the third voltage comparator, when the difference value between the output voltage of the first laser emitting device and the third reference voltage is within the third voltage difference value range, the second indicating lamp is driven to be turned on, and when the difference value between the output voltage of the first laser emitting device and the third reference voltage is not within the third voltage difference value range, the second indicating lamp is driven to be turned off, so that whether the first laser emitting device works normally or not can be observed through the on-off condition of the second indicating lamp.

Example 10

As shown in fig. 10, the present 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 with the second data transmission module 22.

In the present embodiment, the electrical connection refers to a connection for transmitting an electrical signal realized by a cable line, a data bus, or the like. The electrical signal may be a current signal, a voltage signal, a pulse signal, or the like.

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 for controlling each component in the near-end machine to work cooperatively through a software control mechanism, and the second main control module can be a central processing unit, other general processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The first attenuator may be a fiber optic attenuator. The first laser assembly further comprises a first laser emitting device, which may be a laser emitting diode with an electro-optical conversion function, for modulating an uplink radio frequency signal into an uplink optical signal and transmitting the uplink optical signal to the near-end machine through an optical fiber. The second data transmission module may include a 433M receiving chip, configured to generate a downlink intermediate frequency signal with a preset power value.

The second laser assembly 23 is for:

Modulating the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to the remote terminal 1 through the optical fiber 3;

The receiving remote machine 1 demodulates the uplink optical signal transmitted through the optical fiber 3 into an uplink radio frequency signal, and outputs the uplink radio frequency signal to the second main control module 21.

In application, the first laser assembly may include a second laser emitting device and a third laser receiving device, where the second laser emitting device may be a laser emitting diode with an electro-optical conversion function, and is configured to modulate a downlink radio frequency signal and a downlink intermediate frequency signal into a downlink optical signal and transmit the downlink optical signal 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, and is configured to demodulate an uplink optical signal into an uplink radio frequency signal.

In the embodiment, the second digital transmission module generates the downlink intermediate frequency signal with the preset power value, the second laser emission component modulates the downlink radio frequency signal and the downlink intermediate frequency signal into the downlink optical signal and transmits the downlink optical signal to the far-end machine through the optical fiber, and the far-end machine receives the uplink optical signal transmitted by the optical fiber and demodulates the uplink optical signal into the uplink radio frequency signal, so that the near-end machine can demodulate the downlink optical signal into the downlink radio frequency signal and the downlink intermediate frequency signal, and according to the power value of the downlink intermediate frequency signal and the preset power value, the first attenuator is controlled to compensate the link loss of the optical fiber, so that the strength of the downlink optical signal received by each far-end machine is the same, the limitation of the installation distance between the far-end machine and the near-end machine and the connection difference of the optical fiber flange plate is avoided, the installation difficulty of a wireless communication system is effectively reduced, the installation efficiency is improved, and the near-end machine is simple in structure and easy to realize.

Example 11

As shown in fig. 11, in the present 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 downlink optical signal according to the downlink radio frequency signal and the downlink intermediate frequency signal through a fourth current signal and transmit the downlink optical signal to the remote machine 1 through the optical fiber 3;

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

the fourth feedback conditioning circuit 231 is further configured to:

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

Comparing the magnitudes of the output voltage of the third laser receiving device 233 and 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 fourth voltage difference range, the magnitude of the fourth current signal is adjusted so that the difference between the output voltage of the third laser receiving device 233 and the fourth reference voltage is within the fourth voltage difference range.

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

According to the embodiment, a fourth feedback adjusting circuit is used for outputting a fourth current signal according to the magnitudes of a downlink radio frequency signal and a downlink intermediate frequency signal to drive a second laser emitting device to emit a downlink optical signal and transmit the downlink optical signal to a remote terminal through an optical fiber, a third laser receiving device is used for monitoring the light intensity of the downlink optical signal and converting the light intensity of the downlink optical signal into a fifth current signal, the fourth feedback adjusting circuit is used for obtaining the output voltage of the third laser receiving device according to the fifth current signal, the magnitudes of the output voltage of the third laser receiving device and a fourth reference voltage are compared, and when the difference value of the output voltage of the third laser receiving device and the fourth reference voltage is not in a fourth voltage difference range, the magnitude of the fourth current signal is adjusted, so that the difference value of the output voltage of the third laser receiving device and the fourth reference voltage is in a fourth voltage difference range, the constant supply current of the second laser emitting device can be ensured, and the second laser emitting device works under rated current.

Example 12

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

The negative input end of the fourth voltage comparator A4 is connected with a fourth reference voltage U _Ref4; the positive input end of the fourth voltage comparator A4 is electrically connected with one end of a ninth resistor R9 and one end of a tenth resistor R10, and the other end of the ninth resistor R9 is electrically connected with the output end of the third laser receiving device 233; the output end of the fourth voltage comparator A4 is electrically connected with 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;

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

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

In the present 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 motherboard power supply of the near-end machine, and 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 transistors or field effect transistors.

According to the embodiment, the fourth voltage comparator is used for outputting a fourth current signal to drive the second laser emitting device to emit a downlink optical signal according to the magnitudes of the downlink radio frequency signal and the downlink intermediate frequency signal and transmitting the downlink optical signal to the remote terminal through the optical fiber, the third laser receiving device is used for monitoring the light intensity of the downlink optical signal and converting the light intensity of the downlink optical signal into a fifth current signal, the ninth resistor is used for sampling the fifth current signal to obtain the output voltage of the third laser receiving device, the fourth voltage comparator is used for comparing the output voltage of the third laser receiving device with the magnitude of the fourth reference voltage, and when the difference value of the output voltage of the third laser receiving device and the fourth reference voltage is not in the fourth voltage difference range, the magnitude of the fourth current signal is regulated through the third transistor and the fourth transistor, so that the difference value of the output voltage of the third laser receiving device and the fourth reference voltage is in the fourth voltage difference range, the constant power supply current of the second laser emitting device can be ensured, and the second laser emitting device can work under rated current.

Example 13

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

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

the fifth feedback adjustment circuit 234 is configured to:

Obtaining an 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 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 lamp 235 is driven to light; when the difference between the output voltage of the second laser emitting device 232 and the fifth reference voltage is not within the fifth voltage difference range, the third indicator lamp 235 is driven to be turned off.

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

According to the embodiment, the output voltage of the second laser emitting device is obtained through the fifth feedback adjusting circuit according to the current signal output by the second laser emitting device, the output voltage of the second laser emitting device is compared with the fifth reference voltage, when the difference value of the output voltage of the second laser emitting device and the fifth reference voltage is within the fifth voltage difference value range, the third indicating lamp is driven to be on, and when the difference value of the output voltage of the second laser emitting device and the fifth reference voltage is not within the fifth voltage difference value range, the third indicating lamp is driven to be off, so that whether the second laser emitting device works normally or not can be observed through the on-off condition of the third indicating lamp.

Example 14

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

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

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 through the thirteenth resistor, the output voltage of the second laser emitting device is compared with the fifth reference voltage through the fifth voltage comparator, when the difference value between the output voltage of the second laser emitting device and the fifth reference voltage is within the fifth voltage difference range, the third indicator lamp is driven to be turned on, and when the difference value 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 lamp is driven to be turned off, so that whether the second laser emitting device works normally can be observed through the on-off condition of the third indicator lamp.

Example 15

In this embodiment, the second laser assembly 23 includes a fourth laser receiving device 236, a sixth feedback adjustment circuit 237, and a fourth indicator lamp 238 on the basis of any one of embodiments 10 to 14. Fig. 15 exemplarily shows a case where the second laser assembly 23 includes a fourth laser receiving device 236, a sixth feedback adjustment circuit 237, and a fourth indicator lamp 238 on the basis of embodiment 13.

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

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

The sixth feedback adjustment circuit 237 is configured to:

Obtaining an output voltage of the fourth laser receiving device 236 based on the sixth current signal;

comparing the magnitudes of the output voltage of the fourth laser receiving device 236 and 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 sixth voltage difference range, the fourth indicator lamp 238 is driven to light; when the difference between the output voltage of the fourth laser receiving device 236 and the sixth reference voltage is not within the sixth voltage difference range, the fourth indicator lamp 238 is driven to be turned off.

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

According to the embodiment, the fourth laser receiving device receives an uplink light signal transmitted by the remote terminal through the optical fiber and converts the uplink light signal into a sixth current signal, the sixth feedback adjusting circuit obtains the output voltage of the fourth laser receiving device according to the sixth current signal, the output voltage of the fourth laser receiving device is compared with the sixth reference voltage, when the difference value of the output voltage of the fourth laser receiving device and the sixth reference voltage is within a sixth voltage difference value range, the fourth indicating lamp is driven to be on, and when the difference value of the output voltage of the fourth laser receiving device and the sixth reference voltage is not within the sixth voltage difference value range, the fourth indicating lamp is driven to be off, so that the light intensity of the uplink light signal can be conveniently observed through the on-off condition of the fourth indicating lamp.

Example 16

As shown in fig. 16, in the present embodiment, the sixth feedback adjustment circuit 237 in embodiment 15 includes a sixth voltage comparator A6, a fifteenth resistor R15, and a sixteenth resistor R16;

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

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

In application, the sixth reference voltage is provided by the motherboard power supply of the near-end machine, 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 dividing resistor.

In this embodiment, the output voltage of the fourth laser receiving device is sampled by the fifteenth resistor, the magnitudes of the sixth reference voltage and the output voltage of the fourth laser receiving device are compared by the sixth voltage comparator, when the difference value between the output voltage of the fourth laser receiving device and the sixth reference voltage is within the sixth voltage difference range, the fourth indicator lamp is driven to be turned on, and when the difference value between the output voltage of the fourth laser receiving device and the sixth reference voltage is not within the sixth voltage difference range, the fourth indicator lamp is driven to be turned off, so that the light intensity of the uplink light signal can be observed through the on-off condition of the fourth indicator lamp.

Example 17

The present embodiment provides a wireless communication system including:

a plurality of remote units according to any one of embodiments 3 to 9; and

The proximal machine of any one of embodiments 10-16, wherein the proximal machine is coupled to the distal machine by an optical fiber.

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

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments. The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A wireless communication method, applied to a remote machine, comprising:

acquiring a power value of the downlink intermediate frequency signal;

the near-end machine is used for generating a downlink intermediate frequency signal with a preset power value, modulating the downlink radio frequency signal and the downlink intermediate frequency signal into a downlink optical signal and transmitting the downlink optical signal to the far-end machine through an optical fiber;

the remote machine comprises a second feedback regulating circuit, a first laser emitting device and a second laser receiving device;

the second feedback regulating circuit is electrically connected with the first laser emitting device and the second laser receiving device;

the second feedback regulating circuit is used for outputting a second current signal according to an uplink radio frequency signal to drive the first laser emitting device to emit an uplink optical signal and transmitting the uplink optical signal to the near-end machine through an optical fiber;

The second laser receiving device is used for monitoring the light intensity of the uplink light signal and converting the light intensity into a third current signal;

The second feedback adjustment circuit is further configured to:

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 a second reference voltage;

And when the difference value between the output voltage of the second laser receiving device and the second reference voltage is not in the second voltage difference value range, adjusting the magnitude of the second current signal so that the difference value between the output voltage of the second laser receiving device and the second reference voltage is in the second voltage difference value range.

2. The method of claim 1, wherein the remote machine comprises a first laser receiving device and a first indicator light;

The method for receiving the downlink optical signal transmitted by the near-end machine through the optical fiber and demodulating the downlink optical signal into a downlink radio frequency signal and a downlink intermediate frequency signal comprises the following steps:

the method comprises the steps that a first laser receiving device receives a downlink optical signal transmitted by a near-end machine through an optical fiber and converts the downlink optical signal into a first current signal, wherein the first current signal comprises a downlink radio frequency signal and a downlink 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 a first reference voltage;

when the difference value of the output voltage of the first laser receiving device and the first reference voltage is in a first voltage difference value range, driving the first indicator lamp to be lighted;

And when the difference value of the output voltage of the first laser receiving device and the first reference voltage is not in the first voltage difference value range, driving the first indicator lamp to be turned off.

3. The method of claim 1, wherein the remote unit 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 emission device with a third reference voltage;

when the difference value of the output voltage of the first laser emitting device and the third reference voltage is in a third voltage difference value range, driving the second indicator lamp to light;

And when the difference value of the output voltage of the first laser emitting device and the third reference voltage is not in the third voltage difference value range, driving the second indicator lamp to be extinguished.

4. A wireless communication method, applied to a near-end machine, comprising:

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

the near-end machine comprises a fourth feedback regulating circuit, a second laser emitting device and a third laser receiving device;

the fourth feedback regulating circuit is electrically connected with the second laser emitting device and the third laser receiving device;

The fourth feedback regulating circuit is used for driving the second laser emitting device to emit a downlink optical signal through a fourth current signal according to a downlink radio frequency signal and the downlink intermediate frequency signal and transmitting the downlink optical signal to a remote machine through an optical fiber;

the third laser receiving device is used for monitoring the light intensity of the downlink optical signal and converting the light intensity into a fifth current signal;

the fourth feedback adjustment circuit is further configured to:

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 a fourth reference voltage;

And when the difference value between the output voltage of the third laser receiving device and the fourth reference voltage is not in the fourth voltage difference value range, adjusting the magnitude of the fourth current signal so that the difference value between the output voltage of the third laser receiving device and the fourth reference voltage is in the fourth voltage difference value range.

5. The method of claim 4, 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 emission device according to the current signal output by the second laser emission device;

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

when the difference value of the output voltage of the second laser emitting device and the fifth reference voltage is in a fifth voltage difference value range, driving the third indicator lamp to light;

And when the difference value between the output voltage of the second laser emitting device and the fifth reference voltage is not in the fifth voltage difference value range, driving the third indicator lamp to be turned off.

6. The wireless communication method of claim 4, wherein the near-end machine comprises a fourth laser receiving device and a fourth indicator light;

the method for receiving the uplink optical signal transmitted by the far-end machine through the optical fiber and demodulating the uplink optical signal into the uplink radio frequency signal comprises the following steps:

the fourth laser receiving device receives an uplink optical signal transmitted by the remote terminal through the optical fiber and converts the uplink optical signal into a sixth current signal, wherein the sixth current signal comprises an uplink 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 a sixth reference voltage;

When the difference value between the output voltage of the fourth laser receiving device and the sixth reference voltage is within a sixth voltage difference range, driving the fourth indicator lamp to light;

And when the difference value between the output voltage of the fourth laser receiving device and the sixth reference voltage is not in the sixth voltage difference value range, driving the fourth indicator lamp to be turned off.

7. The remote machine is 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 used for:

the first laser component is also used for modulating an uplink radio frequency signal into an uplink optical signal and transmitting the uplink optical signal to the near-end machine through an optical fiber;

the first laser assembly comprises a second feedback regulating circuit, a first laser emitting device and a second laser receiving device;

The second feedback adjustment circuit is further configured to:

8. The remote machine of claim 7, wherein said first laser assembly comprises a first laser receiving device, a first feedback adjustment circuit, and a first indicator light;

the first feedback regulating circuit is electrically connected with the first laser receiving device and the first indicator lamp;

the first laser receiving device is used for receiving a downlink optical signal transmitted by the near-end machine through an optical fiber and converting the downlink optical signal into a first current signal, and the first current signal comprises a downlink radio frequency signal and a downlink intermediate frequency signal;

the first feedback adjustment circuit is configured to:

9. The remote machine of claim 8, wherein the first feedback adjustment circuit comprises a first voltage comparator, a first resistor, and a second resistor;

The negative input end of the first voltage comparator is connected with the first reference voltage;

The positive input end of the first voltage comparator is electrically connected with the output end of the first laser receiving device and one end of the first resistor, and the other end of the first resistor is grounded;

the output end of the first voltage comparator is electrically connected with one end of the second resistor, the other end of the second resistor is electrically connected with the input end of the first indicator lamp, and the output end of the first indicator lamp is grounded.

10. The remote unit of claim 7, wherein the second feedback regulation circuit comprises a second voltage comparator, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first transistor, and a second transistor;

the negative input end of the second voltage comparator is connected with the second reference voltage;

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

the output end of the second voltage comparator is electrically connected with the other end of the fourth resistor, the input end of the first transistor and the controlled end of the second transistor;

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

the controlled end of the first transistor is electrically connected with 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 with one end of the sixth resistor, the other end of the sixth resistor is electrically connected with the input end of the first laser emitting device, and the output end of the first laser emitting device is connected with signal ground.

11. The remote machine of claim 7, wherein said first laser assembly further comprises a third feedback adjustment circuit and a second indicator light;

the third feedback regulating circuit is electrically connected with the first laser emitting device and the second indicator lamp;

The third feedback adjustment circuit is configured to:

12. The remote machine of claim 11, wherein said third feedback adjustment circuit comprises a third voltage comparator, a seventh resistor, and an eighth resistor;

the negative input end of the third voltage comparator is connected with the third reference voltage;

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

The output end of the third voltage comparator is electrically connected with one end of the eighth resistor, the other end of the eighth resistor is electrically connected with the input end of the second indicator lamp, and the output end of the second indicator lamp is grounded.

13. The near-end machine is characterized by comprising a second main control module, a second digital transmission module and a second laser component;

the second laser assembly is for:

Receiving an uplink optical signal transmitted by a remote terminal through an optical fiber, demodulating the uplink optical signal into an uplink radio frequency signal, and outputting the uplink radio frequency signal to the second main control module;

the second laser assembly comprises a fourth feedback regulating circuit, a second laser emitting device and a third laser receiving device;

the fourth feedback adjustment circuit is further configured to:

14. The near-end machine of claim 13, wherein the second laser assembly further comprises a fifth feedback adjustment circuit and a third indicator light;

the fifth feedback regulating circuit is electrically connected with the second laser emitting device and the third indicator lamp;

the fifth feedback adjustment circuit is configured to:

15. The near-end machine of claim 13, wherein the second laser assembly comprises a fourth laser receiving device, a sixth feedback adjustment circuit, and a fourth indicator light;

The sixth feedback regulating circuit is electrically connected with the fourth laser receiving device and the fourth indicator lamp;

The fourth laser receiving device is used for receiving an uplink optical signal transmitted by the remote terminal through the optical fiber and converting the uplink optical signal into a sixth current signal, and the sixth current signal comprises an uplink radio frequency signal;

The sixth feedback adjustment circuit is configured to:

16. A wireless communication system, comprising:

A plurality of remote machines as claimed in any one of claims 7 to 12; and

A proximal machine according to any one of claims 13 to 15, said proximal machine being connected to said distal machine by optical fibres.