Single-interface photoelectric interconnection device and ultrashort wave radio station emergency interconnection method

Abstract

The invention discloses a single-interface photoelectric interconnection device and an ultra-short wave radio station emergency interconnection method, and belongs to the technical field of emergency communication. The device comprises an interface conversion unit which is connected with external communication equipment; the duplexer unit is connected with the interface conversion unit; the duplexer unit is connected with the sending path, and the output end of the sending path is connected with the first interface of the non-reciprocity transmission unit; a second interface of the non-reciprocity transmission unit is connected with the optical fiber network; the third interface of the non-reciprocity transmission unit is connected with the input end of the receiving path, and the output end of the receiving path is connected with the duplexer unit. The radio station equipment can be conveniently connected with the optical fiber network, the equipment is simple in structure and convenient to install, the environmental adaptability of the existing radio station equipment can be improved, and the communication distance and the anti-interference capability of the radio station equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency communication, and particularly to a single-interface optoelectronic interconnection device and an ultra-short wave radio emergency interconnection method. Background Art

[0002] In the field of emergency communication, ultra-short wave radios are important communication devices, which are widely used in scenarios such as military, emergency rescue, and natural disaster handling. Traditional ultra-short wave radio communication mainly relies on the propagation of radio waves in space. The propagation of ultra-short wave signals mainly relies on line-of-sight propagation, which is significantly affected by terrain and landforms. Usually, communication within a range of only a few kilometers to dozens of kilometers can be achieved; wireless transmission is easily affected by factors such as weather, electromagnetic environment, and human interference, and it is difficult to ensure the communication quality in complex environments; radio waves propagating in space are easily intercepted, making it difficult to guarantee communication security.

[0003] Although there are some wired connection solutions for ultra-short wave radios in the prior art, such as using special cables for connection, these solutions usually have problems such as short transmission distance and high construction cost, and cannot meet the requirements of long-distance and high-reliability emergency communication. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to achieve a portable connection between a wireless communication device and an optical fiber network, and ensure the simultaneous transmission of received signals and transmitted signals without mutual interference.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] In a first aspect, the present invention provides a single-interface optoelectronic interconnection device, including: an interface conversion unit, configured to receive a transmitted electrical signal sent by an external communication device and a received electrical signal transmitted inside the device, and perform format conversion on the transmitted electrical signal and the received electrical signal respectively;

[0007] A duplexer unit, configured to output the transmitted electrical signal after format conversion by the interface conversion unit to a transmission path inside the device for processing to obtain a transmitted optical signal; and at the same time, configured to output the received electrical signal output by the reception path inside the device to the interface conversion unit;

[0008] A non-reciprocal transmission unit, at least including a first interface, a second interface, and a third interface, where the first interface is configured to transmit the transmitted optical signal to the second interface; the second interface is configured to output the transmitted optical signal to an optical fiber network, and at the same time input the received optical signal input by the optical fiber network to the third interface; the third interface is configured to transmit the received optical signal to the reception path for processing to obtain the received electrical signal.

[0009] The non-reciprocal transmission unit includes a three-port circulator.

[0010] The transmission path includes:

[0011] A transmission power adjustment unit for adjusting the power of the transmitted electrical signal to ensure that the power of the transmitted electrical signal is within the desired range;

[0012] A transmission bias point adjustment unit for adjusting the transmitted electrical signal with adjusted power by the transmission power adjustment unit from a negative sine wave signal to a positive value;

[0013] An electro-optical conversion unit for converting the transmitted electrical signal adjusted by the transmission bias point adjustment unit into a transmitted optical signal.

[0014] The electro-optical conversion unit includes a modulation laser.

[0015] The receiving path includes:

[0016] A photoelectric conversion unit for converting the received optical signal into a received electrical signal;

[0017] A receiving bias point adjustment unit for adjusting the bias point of the received electrical signal converted by the photoelectric conversion unit to restore the original characteristics of the received electrical signal;

[0018] A receiving power adjustment unit for adjusting the power of the received electrical signal adjusted by the receiving bias point adjustment unit to ensure that the power of the received electrical signal is within the desired operating range.

[0019] The photoelectric conversion unit includes a photodetector.

[0020] In a second aspect, the present invention provides a VHF radio emergency interconnection system, including the single-interface optoelectronic interconnection device described in the first aspect, and the interface conversion unit is in bidirectional communication connection with the VHF radio.

[0021] In a third aspect, the present invention provides a VHF radio emergency interconnection method, which is implemented based on the above-mentioned VHF radio emergency interconnection system, and the method includes:

[0022] In the transmission stage, receive the transmitted electrical signal sent by the VHF radio through the interface conversion unit, perform interface format conversion and then output it to the duplexer unit; output the transmitted electrical signal to the transmission path through the duplexer unit for processing to obtain a transmitted optical signal; send the transmitted optical signal to the optical fiber network through the non-reciprocal transmission unit;

[0023] In the receiving stage, receive the received optical signal in the optical fiber network through the non-reciprocal transmission unit, and send the received optical signal into the receiving path for processing to obtain a received electrical signal; output the received electrical signal to the interface conversion unit through the duplexer unit, and send the received electrical signal into the VHF radio after format conversion through the interface conversion unit.

[0024] The optical fiber network is a single-fiber bus network.

[0025] Advantages of the present invention:

[0026] The single-interface optical-electric interconnection device of the present invention can convert the transmitted electrical signal of the ultra-short wave radio into a transmitted optical signal for transmission in the optical fiber network. At the same time, it can convert the received optical signal into a received electrical signal to realize the optical fiber interconnection communication of wireless communication devices, and can ensure that the reception and transmission of signals are carried out simultaneously without mutual influence, effectively improving the communication security and quality while ensuring the communication efficiency. Moreover, the device of the present invention has a simple structure, is convenient for installation and carrying, can be applied to communication tasks in a variety of complex scenarios, and can realize the communication of a single-fiber bus network. Description of the Drawings

[0027] Figure 1 It is the structure diagram of the single-interface optical-electric interconnection device of Embodiment 1 of the present invention;

[0028] Figure 2 It is the structure diagram of the single-interface optical-electric interconnection device of Embodiment 2 of the present invention;

[0029] Figure 3 It is the structure schematic diagram of the optical fiber network of the present invention. Detailed Embodiments

[0030] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0031] Embodiment 1

[0032] Referring to Figure 1 shown, a single-interface optical-electric interconnection device, one end of the device is connected to an external communication device for obtaining a transmitted electrical signal, and the other end is connected to an optical fiber network for obtaining a received optical signal;

[0033] More specifically, the single-interface optical-electric interconnection device of this embodiment includes:

[0034] An interface conversion unit for receiving the transmitted electrical signal sent by the external communication device and the received electrical signal transmitted inside the device, and respectively performing format conversion on the transmitted electrical signal and the received electrical signal;

[0035] A duplexer unit for outputting the transmitted electrical signal after format conversion by the interface conversion unit to the transmission path inside the device for processing to obtain a transmitted optical signal; and at the same time for outputting the received electrical signal output from the reception path inside the device to the interface conversion unit;

[0036] The non-reciprocal transmission unit includes at least a first interface, a second interface, and a third interface. The first interface is used to transmit the transmitted optical signal to the second interface. The second interface is used to output the transmitted optical signal to the optical fiber network and at the same time input the received optical signal input by the optical fiber network to the third interface. The third interface is used to transmit the received optical signal to the receiving path for processing to obtain the received electrical signal.

[0037] The external communication device described in the present invention can be different types of ultra-short wave radios. According to the interface types of different ultra-short wave radios (such as BNC, TNC, N-type, etc.), the corresponding interface adapters can be selected to achieve connection with various types of ultra-short wave radio devices.

[0038] The duplexer unit is connected to the interface conversion unit. The duplexer unit divides the transmission of signals inside the device into a transmission path and a reception path, realizing the functions of signal splitting and combining, and avoiding interference between the transmitted signal and the received signal. On the transmission path, a transmission power adjustment unit, a transmission bias point adjustment unit, and an electro-optical conversion unit are sequentially arranged. On the reception path, an opto-electronic conversion unit, a reception bias point adjustment unit, and a reception power adjustment unit are sequentially arranged.

[0039] The input end of the transmission power adjustment unit is connected to the duplexer unit. The transmission power adjustment unit is an adjustable attenuator or a fixed attenuator, which is used to accurately adjust the power level of the transmitted electrical signal to ensure that the transmitted electrical signal works within the optimal power range, creating good conditions for subsequent processing of the transmitted electrical signal.

[0040] The input end of the transmission bias point adjustment unit is connected to the output end of the transmission power adjustment unit. Its function is to adjust the DC bias level of the signal, adjust the transmitted electrical signal after power adjustment by the transmission power adjustment unit from a negative sine wave signal to a positive value, and ensure that the laser works in the linear region.

[0041] The output end of the transmission bias point adjustment unit is connected to the input end of the electro-optical conversion unit. The electro-optical conversion unit uses a directly modulated laser to convert the electrical signal into an optical signal. The electro-optical conversion unit is used to convert the transmitted electrical signal adjusted by the transmission bias point adjustment unit into a transmitted optical signal. The modulation principle of the directly modulated laser is to modulate the output optical power by changing the injection current. Its response speed is usually in the nanosecond level, and the bandwidth can reach several GHz, which is sufficient to meet the transmission requirements of ultra-short wave radio signals (30 - 300 MHz).

[0042] In this embodiment, the non-reciprocal transmission unit is a three-port circulator. The three-port circulator is provided with a first interface 1, a second interface 2, and a third interface 3. The output end of the electro-optic conversion unit is connected to the first interface 1 of the three-port circulator. The second interface 2 of the three-port circulator is connected to the fiber optic network, and the third interface 3 of the three-port circulator is connected to the input end of the opto-electric conversion unit.

[0043] The three-port circulator has non-reciprocal transmission characteristics, which can ensure that signals flow in a predetermined direction (first interface 1 → second interface 2; second interface 2 → third interface 3), avoiding mutual interference between the transmitted signal and the received signal. The transmitted optical signal is only transmitted from the first interface 1 to the second interface 2, and the received optical signal is only transmitted from the second interface 2 to the third interface 3. The second interface 2 can be connected to the fiber optic network through an adapter, or can be connected to the fiber optic network by means of fiber splicing.

[0044] The opto-electric conversion unit described above includes a photodetector, which can convert the received optical signal into a received electrical signal. PIN photodiodes or avalanche photodiodes are usually used for the photodetector.

[0045] The input end of the received bias point adjustment unit is connected to the output end of the opto-electric conversion unit. The output end of the received bias point adjustment unit is connected to the input end of the received power adjustment unit. The function of the received bias point adjustment unit is to adjust the bias point of the received electrical signal converted by the opto-electric conversion unit, restore the original characteristics of the received electrical signal, and ensure that the received electrical signal can be correctly recognized by external communication devices.

[0046] The output end of the received power adjustment unit is connected to the duplexer unit. The received power adjustment unit is an adjustable attenuator or a fixed attenuator, which is used to adjust the power of the received electrical signal adjusted by the received bias point adjustment unit to ensure that the received electrical signal operates within the optimal power range.

[0047] The transmitted bias point adjustment unit and the received bias point adjustment unit used in this embodiment can be bias circuits composed of transistors, field effect transistors, etc. Any circuit or device that can implement the bias point adjustment function is acceptable, and the present invention does not limit this here.

[0048] The single-interface opto-electric interconnection device described in this embodiment has a simple structure, a small number of devices, a low system complexity, and obvious cost advantages; it has a fast response speed for signal reception and transmission; and it is suitable for the requirements of emergency communication within the city, rapid emergency deployment, and communication in sensitive scenarios.

[0049] Embodiment 2

[0050] As shown in Figure 2, a single-interface optoelectronic interconnection device. On the transmission path, the duplexer unit is connected to the input end of the transmission power adjustment unit, and the output end of the transmission power adjustment unit is connected to the electro-optic conversion unit. The electro-optic conversion unit is an external modulation structure, including: an external modulator and a laser.

[0051] More specifically, the output end of the transmission power adjustment unit is connected to the input end of the external modulator, the output end of the external modulator is connected to the first interface 1 of the three-port circulator, and the input end of the external modulator is also connected to a laser. The external modulator receives the transmitted electrical signal in the transmission path and the optical carrier of the laser, and outputs the modulated optical signal to the first interface 1 of the three-port circulator.

[0052] The laser generates a stable continuous optical carrier and modulates the optical carrier according to the transmitted electrical signal. The laser operates in the continuous wave mode, and the output optical power and wavelength remain constant, laying a foundation for high-quality signal transmission. The external modulator integrates a bias point adjustment function, which can automatically optimize the modulation operating point to ensure the best modulation performance.

[0053] Since the external modulator already integrates the bias point adjustment function, there is no need to separately set a bias point adjustment unit in the transmission path. However, in the receiving path, a bias point adjustment unit still needs to be set to restore the original characteristics of the signal after optoelectronic conversion to ensure that the signal can be correctly recognized by the ultra-short wave radio.

[0054] The receiving path setting and other functional units of this embodiment are the same as those in Embodiment 1 and will not be elaborated here.

[0055] The external modulation scheme has excellent modulation performance, with advantages such as a larger modulation depth, better linearity, and smaller signal distortion, and can process higher-frequency RF signals; it is suitable for long-distance transmission: the generated optical signal has higher quality, less dispersion and nonlinear effects, and is particularly suitable for long-distance optical fiber transmission applications; the bias point has good stability: the built-in bias point automatic control function of the external modulator can effectively compensate for the influence of environmental factors such as temperature drift and maintain stable modulation performance.

[0056] Embodiment 3

[0057] A ultra-short wave radio emergency interconnection system includes the above single-interface optoelectronic interconnection device, and the interface conversion unit is in bidirectional communication connection with the ultra-short wave radio.

[0058] Embodiment 4

[0059] As Figure 3 shown, several ultra-short wave radios are connected to the optical fiber network through the single-interface optoelectronic interconnection device described in Embodiment 1 to form a communication network; based on the ultra-short wave radio emergency interconnection system, this embodiment provides a ultra-short wave radio emergency interconnection method, including the following steps:

[0060] In the transmission stage, the interface conversion unit receives the transmitted electrical signal sent by the VHF radio, performs interface format conversion, and then outputs it to the duplexer unit; the duplexer unit outputs the transmitted electrical signal to the transmission path for processing to obtain a transmitted optical signal; the non-reciprocal transmission unit sends the transmitted optical signal into the optical fiber network;

[0061] In the reception stage, the non-reciprocal transmission unit receives the received optical signal in the optical fiber network, sends the received optical signal into the reception path for processing to obtain a received electrical signal; the duplexer unit outputs the received electrical signal to the interface conversion unit, and the interface conversion unit performs format conversion on the received electrical signal and then sends it into the VHF radio.

[0062] More specifically, the transmitted electrical signal is obtained from the output end of the VHF radio. This transmitted electrical signal is usually an amplitude modulation signal, a frequency modulation signal, or a digital modulation signal, with a frequency range of 30 - 300 MHz;

[0063] Connect the VHF radio to the interface conversion unit, that is, connect the VHF radio to the interface of the interface conversion unit of the single-interface optical and electrical interconnection device that matches it through its upper interface, convert the transmitted electrical signal of the VHF radio into a format that can be processed inside the device, and ensure physical interface compatibility;

[0064] The duplexer unit divides the VHF radio signal path into a transmission path and a reception path, enabling the system to process transmission and reception signals simultaneously.

[0065] On the transmission path, the duplexer unit sends the transmitted electrical signal into the transmission power adjustment unit for signal power adjustment. The transmission power adjustment unit adjusts the power of the transmitted electrical signal to the operating range suitable for the laser in the electro-optical conversion unit, ensuring that the subsequent laser operates at the optimal operating point; the transmission power adjustment unit then sends the transmitted electrical signal to the transmission bias point adjustment unit, and the transmission bias point adjustment unit adjusts the bias point of the transmitted electrical signal, adjusts the negative sine wave signal to a positive value, ensuring that the laser operates in the linear region and avoiding non-linear distortion caused by laser cutoff; the electro-optical conversion unit receives the above-adjusted transmitted electrical signal and converts it into a transmitted optical signal; the transmitted optical signal enters the first interface 1 of the three-port circulator and is output from the second interface 2 and coupled into the optical fiber network. In this embodiment, the optical fiber network is a single-fiber bus network, and the transmitted optical signal is transmitted to other VHF radios through the single-fiber bus network;

[0066] On the receiving path, the three-port circulator receives the received optical signal input by other VHF radios in the optical fiber network. The received optical signal is input from the second interface 2 of the three-port circulator and output from the third interface 3 to the optoelectronic conversion unit, which converts the received optical signal into an electrical signal. The converted electrical signal is first subjected to bias point adjustment by the receiving bias point adjustment unit, and then the received electrical signal is subjected to power adjustment by the receiving power adjustment unit to restore the signal characteristics, ensure that the signal waveform remains unchanged, and obtain a received electrical signal that meets the receiving requirements of the VHF radio, ensuring that the signal can be correctly recognized by the receiving VHF radio. The adjusted received electrical signal is combined by the duplexer unit and then output to the interface conversion unit, which converts the format of the received electrical signal and outputs it to the VHF radio.

[0067] In summary, the single-interface optoelectronic interconnection device of the present invention can flexibly and conveniently add or reduce communication devices such as VHF radios in the network system as needed; its structure is simple and easy to install; the communication network system based on the device of the present invention has strong scalability, only requires laying a single optical fiber, and greatly simplifies the network deployment difficulty. Compared with the transmission distance of several kilometers to dozens of kilometers of traditional VHF radios, the present invention uses optical fiber as the transmission medium, and on the basis of retaining the wireless communication function of the VHF radio, can extend the interconnection communication distance to dozens of kilometers or even hundreds of kilometers; the technical solution of the present invention is adapted to existing VHF radio equipment, can enhance the system adaptability, realizes compatibility with various VHF radios through the interface conversion unit, and does not need to transform the radio equipment itself; through the non-reciprocal transmission characteristics of the three-port circulator, the bidirectional communication function of a single optical fiber is realized, the system structure is simplified, and the deployment difficulty is reduced; the differential bias point adjustment can use either direct modulation or external modulation methods, providing an optimized bias point adjustment scheme to ensure that the system can obtain the best performance in various application scenarios.

[0068] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0069] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A single-interface optoelectronic interconnection device, characterized in that Comprising: An interface conversion unit, configured to receive a transmitted electrical signal sent by an external communication device and a received electrical signal transmitted inside the device, and perform format conversion on the transmitted electrical signal and the received electrical signal respectively; A duplexer unit, configured to output the transmitted electrical signal after format conversion by the interface conversion unit to a transmission path inside the device for processing to obtain a transmitted optical signal; and at the same time, configured to output the received electrical signal output by the reception path inside the device to the interface conversion unit; A non-reciprocal transmission unit, at least including a first interface, a second interface, and a third interface, where the first interface is configured to transmit the transmitted optical signal to the second interface; the second interface is configured to output the transmitted optical signal to an optical fiber network, and at the same time input the received optical signal input by the optical fiber network to the third interface; The third interface is configured to transmit the received optical signal to the reception path for processing to obtain the received electrical signal.

2. The single-interface optoelectronic interconnection device according to claim 1, wherein The non-reciprocal transmission unit includes a three-port circulator.

3. The single-interface optoelectronic interconnection device according to claim 1, characterized in that The transmission path includes: A transmission power adjustment unit, configured to adjust the power of the transmitted electrical signal to ensure that the power of the transmitted electrical signal is within a desired range; A transmission bias point adjustment unit, configured to adjust the transmitted electrical signal with the power adjusted by the transmission power adjustment unit from a negative sine wave signal to a positive value; An electro-optical conversion unit, configured to convert the transmitted electrical signal adjusted by the transmission bias point adjustment unit into a transmitted optical signal.

4. The single-interface optoelectronic interconnection device according to claim 3, characterized in that, The electro-optical conversion unit includes a modulation laser.

5. The single-interface optoelectronic interconnection device according to claim 1, characterized in that, The reception path includes: An opto-electrical conversion unit, configured to convert the received optical signal into a received electrical signal; A reception bias point adjustment unit, configured to perform bias point adjustment on the received electrical signal converted by the opto-electrical conversion unit to restore the original characteristics of the received electrical signal; A reception power adjustment unit, configured to perform power adjustment on the received electrical signal adjusted by the reception bias point adjustment unit to ensure that the power of the received electrical signal is within a desired operating range.

6. The single-interface optoelectronic interconnection device according to claim 5, characterized in that, The opto-electrical conversion unit includes a photodetector.

7. An ultra-short wave radio emergency interconnection system, characterized in that, Comprising: The single-interface opto-electrical interconnection device according to any one of claims 1 to 6, where the interface conversion unit is in bidirectional communication connection with the ultra-short wave radio.

8. A method for emergency interconnection of ultra-short wave radio stations, characterized in that, Implemented based on the ultra-short wave radio emergency interconnection system according to claim 7, the method includes: In the transmission stage, receiving the transmitted electrical signal sent by the ultra-short wave radio through the interface conversion unit, performing interface format conversion, and then outputting it to the duplexer unit; outputting the transmitted electrical signal to the transmission path through the duplexer unit for processing to obtain a transmitted optical signal; transmitting the transmitted optical signal to the optical fiber network through the non-reciprocal transmission unit; In the reception stage, receiving the received optical signal in the optical fiber network through the non-reciprocal transmission unit, and sending the received optical signal to the reception path for processing to obtain a received electrical signal; outputting the received electrical signal to the interface conversion unit through the duplexer unit, and performing format conversion on the received electrical signal through the interface conversion unit and then sending it into the ultra-short wave radio.

9. The method for emergency interconnection of ultra-short wave radio stations according to claim 8, characterized in that, The optical fiber network is a single-fiber bus network.

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