CN117527054A - Digital-analog hybrid optical transmitter-receiver for radio frequency signal electro-optical backup design - Google Patents

Digital-analog hybrid optical transmitter-receiver for radio frequency signal electro-optical backup design Download PDF

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Publication number
CN117527054A
CN117527054A CN202311472530.1A CN202311472530A CN117527054A CN 117527054 A CN117527054 A CN 117527054A CN 202311472530 A CN202311472530 A CN 202311472530A CN 117527054 A CN117527054 A CN 117527054A
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CN
China
Prior art keywords
optical
radio frequency
input
link
electro
Prior art date
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Pending
Application number
CN202311472530.1A
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Chinese (zh)
Inventor
刘朝阳
刘国栋
王清波
顾赛麟
张予翔
胡日华
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Shanghai Aerospace Science and Industry Appliance Co Ltd
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Shanghai Aerospace Science and Industry Appliance Co Ltd
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Priority to CN202311472530.1A priority Critical patent/CN117527054A/en
Publication of CN117527054A publication Critical patent/CN117527054A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)

Abstract

The invention discloses a digital analog hybrid optical transmitter and receiver of a radio frequency signal electro-optic backup design, which comprises a radio frequency signal photoelectric dual-link backup assembly, wherein the backup assembly comprises an optical link, an electric link and an optical switch, wherein radio frequency electric input in the electric link forms a first optical channel in the optical switch through a radio frequency electro-optic switching module, radio frequency optical input in the optical link is divided into two groups of optical input branches through an optical branching device, one group of optical input branches forms a second optical channel in the optical switch, the other group of optical input carries out photoelectric conversion of a PD detector assembly, and the other group of optical input is sent to an MCU for judgment after passing through a voltage comparator; the radio frequency optical input and the radio frequency electric input are in a redundant backup mode and take the radio frequency optical input as a main guide, the MCU under the optical link cuts off the radio frequency electro-optical conversion module so as to block the second optical channel, and meanwhile, the MCU controls the optical switch to be switched to the second optical channel for transmission; and the MCU starts the radio frequency electro-optical conversion module and controls the optical switch to be switched to the first optical channel for transmission under the condition of poor communication of the optical link.

Description

Digital-analog hybrid optical transmitter-receiver for radio frequency signal electro-optical backup design
Technical Field
The invention belongs to the technical field of radar communication systems, and particularly relates to a digital-analog hybrid optical transceiver designed for radio frequency signal electro-optical backup.
Background
It is known that, among many indexes of radar communication systems, the detection distance is an important one, and besides the relation of the transmission power, the front-end aperture and the like, the noise factor of a receiving link is also important, and on the other hand, the target resolution is closely related to the compression dynamic range of the receiving link. However, with the deep development of radar and electronic warfare integration, the complexity of the electromagnetic environment is further improved, and in order to rapidly acquire, comprehensively process and flexibly correspond to various information, the increase of frequency resources on the premise of relatively fixed time resources makes the system have high bandwidth performance important.
The radar communication system needs to realize multipath Ethernet exchange, and in the exchange process, due to the problems of data throughput, interference and the like of a transmission system, the problem of poor radio frequency link communication of equipment is easy to occur by adopting single optical link transmission and single electric link transmission in the prior art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the following technical scheme:
a digital analog hybrid optical transceiver designed by radio frequency signal electro-optical backup comprises a radio frequency signal photoelectric dual-link backup assembly, wherein the backup assembly comprises an optical link, an electric link and an optical switch, a first optical channel is formed in the optical switch by radio frequency electric input in the electric link through a radio frequency electro-optical switching module, the radio frequency optical input in the optical link is divided into two groups of optical input branches through an optical branching device, one group of optical input branches forms a second optical channel in the optical switch, the other group of optical input carries out photoelectric conversion of a PD detector assembly, and the other group of optical input is sent to an MCU for judgment after passing through a voltage comparator;
the radio frequency optical input and the radio frequency electric input are in a redundant backup mode and take the radio frequency optical input as a main guide, the MCU under the optical link cuts off the radio frequency electro-optical conversion module so as to block the second optical channel, and meanwhile, the MCU controls the optical switch to be switched to the second optical channel for transmission; and the MCU starts the radio frequency electro-optical conversion module and controls the optical switch to be switched to the first optical channel for transmission under the condition of poor communication of the optical link.
As the optimization of the technical scheme, the optical transceiver further comprises an upper optical transceiver and a lower optical transceiver, and the upper optical transceiver and the lower optical transceiver realize bidirectional signal transmission through optical fibers.
As an optimization of the above technical scheme, the optical transceiver performs electro-optical conversion on the input multiple paths of RS422 signals, radar DBF data, multiple paths of USB2.0 signals, multiple paths of gigabit network signals and radio frequency signals through the SFP optical module.
As an optimization of the above technical scheme, the multipath RS422 signals are subjected to electro-optic conversion by the RS422 driving chip, the serializer deserializer and the SFP optical module;
the multi-path gigabit network signal is subjected to electro-optical conversion through a network transformer, a PHY physical layer chip and an SFP optical module;
the radar DBF data performs electro-optic conversion through a multimode optical module and an SFP optical module;
and the multipath USB2.0 signals are subjected to electro-optical conversion through a USB driving chip, an FPGA and an SFP optical module.
As the optimization of the technical scheme, the radio frequency signal comprises a radio frequency input and a radio frequency output, the upper optical transceiver outputs the radio frequency through the optical attenuator, the photoelectric detector and the numerical control attenuation module, and the radio frequency input is through the EDFA optical amplification, the radio frequency electro-optical conversion module and the low noise phase amplifier.
As an optimization of the above technical scheme, the lower optical transceiver performs electro-optical conversion on the input multi-path RS422 signal, radar DBF data, multi-path USB2.0 signal, multi-path gigabit network signal and radio frequency signal through the SFP optical module.
As the optimization of the technical scheme, the multi-gigabit network signals in the lower optical transceiver are subjected to electro-optical conversion through a plurality of groups of network transformers, network switching chips, PHY physical layer chips and SFP optical modules.
The beneficial effects of the invention are as follows:
1. in the invention, the radio frequency optical signal is derived from the main detection radar of the cockpit, the priority is highest, and the slave radar equipment performs corresponding radar detection action after receiving the radar instruction transmitted by the main detection radar. In the design, in order to improve the reliability of the system, a transmission mode of electro-optical redundancy backup is adopted, the downstream slave radar equipment can monitor the state of the optical link of the main detection equipment, and once the communication failure of the radio frequency link of the main detection equipment is found, the slave radar is automatically switched to the self radio frequency electric signal transmission to complete the control of the downstream control equipment, so that the transmission reliability of the whole system is improved.
2. The invention adopts a radio frequency signal transmission mode, can realize the digitization of high-bandwidth radio frequency signals, can deploy a large number of variable-capacity demodulation devices at the front end for optical fiber transmission after the digitization is completed on satellite ground stations, broadband microwave communication and radars, and has the advantages of digital attribute, reliable transmission, high performance, reproducibility, convenient networking and the like.
Drawings
FIG. 1 shows a functional block diagram of the present invention;
fig. 2 is a schematic diagram of a part of a radio frequency signal photoelectric dual-link backup assembly in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments.
A digital analog mixed optical transceiver designed by radio frequency signal electro-optic backup comprises a radio frequency signal photoelectric dual-link backup assembly, wherein the backup assembly comprises an optical link, an electric link and an optical switch, a first optical channel is formed in the optical switch by radio frequency electric input in the electric link through a radio frequency electro-optic switching module, the radio frequency optical input in the optical link is divided into two groups of optical input branches through an optical branching device, one group of optical input branches forms a second optical channel in the optical switch, the other group of optical input carries out photoelectric conversion of a PD detector assembly, and the PD detector assembly is sent to an MCU for judgment after passing through a voltage comparator;
the radio frequency optical input and the radio frequency electric input are in a redundant backup mode and take the radio frequency optical input as a main guide, the MCU under the optical link cuts off the radio frequency electro-optical conversion module so as to block the second optical channel, and meanwhile, the MCU controls the optical switch to be switched to the second optical channel for transmission; and the MCU starts the radio frequency electro-optical conversion module and controls the optical switch to be switched to the first optical channel for transmission under the condition of poor communication of the optical link.
The communication system is divided into two devices of an upper optical transceiver and a lower optical transceiver, and the bidirectional signal transmission of the upper optical transceiver and the lower optical transceiver is completed through one optical fiber. The upper optical transceiver performs electro-optical conversion on input multipath RS422 control signals, radar downlink DBF data, USB2.0 downlink transmission, multipath Ethernet downlink transmission and radio frequency signal downlink transmission signals through an optical module, different transmission signal types adopt different optical wavelengths, and finally optical fiber transmission is performed through a wavelength division multiplexing mode. In the same way, the optical module is used by the optical transceiver to perform photoelectric conversion on the wavelength division multiplexing uplink signals, and then chips such as a deserializer, an FPGA and the like are used to recover uplink different signals.
The optical module is adopted by the lower optical transceiver to carry out photoelectric conversion on the downlink signals transmitted by the upper optical transceiver, and the lower optical transceiver is different from the upper optical transceiver in that the lower optical transceiver needs to exchange the downlink Ethernet signals of the upper optical transceiver and the Ethernet electrical signals input by the lower optical transceiver, and the panel specific network port is adopted to access the multi-channel Ethernet. The lower optical transceiver performs photoelectric conversion on other kinds of signals through the optical module and is connected to the designated equipment through the panel electrical interface. The upper and lower optical terminal panels are reserved with data reporting Ethernet interfaces, and the monitoring function of the upper computer is completed in a network data reporting mode.
And 6 paths of gigabit optical Ethernet signals are transmitted to be interconnected with the network optical transceiver, so that the control of the cockpit main detection radar on the interconnected optical transceiver equipment is realized. After receiving signals such as communication commands and state monitoring transmitted by the cockpit, starting an Ethernet switch from the optical transceiver equipment to communicate with downstream control equipment so as to complete the control of the whole system; the four-way USB2.0 is used for completing log collection of the radar turret and transmitting the log collection to a slave radar signal room by utilizing optical communication to complete log monitoring and fault early warning of the radar turret.
The digital analog signals are respectively processed by different signal processing modes, the radio frequency signals in the upper optical transceiver are converted into optical signals by a low noise amplifier, a radio frequency electro-optical conversion module and an optical amplification mode, the radio frequency output is subjected to radio frequency signal photoelectric conversion by adopting an attenuator and radio frequency photoelectric detector mode, and the radio frequency electro-optical/photoelectric conversion modules are subjected to signal conversion by adopting a radio frequency optical module. For digital signals, the multipath RS422 signals, the Ethernet signals, the USB2.0 signals and the radar DBF signals are processed through different signal processing modes and then are subjected to electro-optic conversion through an optical module. And finally, carrying out wavelength division multiplexing on analog and digital signals with different wavelengths, and transmitting the analog and digital signals to a lower optical transceiver through a single-mode fiber.
The lower optical transceiver performs the de-wavelength division multiplexing on the wavelength division multiplexing optical signals output by the upper optical transceiver, and for the radio frequency signals, the redundant backup mode design of the radio frequency optical signals and the electric signals is adopted, and the method is mainly used for the clock networking backup design.
The principle is as follows: the radio frequency optical input and the radio frequency electric input are in a redundant backup mode and take the radio frequency optical input as a main guide, the MCU under the optical link cuts off the radio frequency electro-optical conversion module so as to block the second optical channel, and meanwhile, the MCU controls the optical switch to be switched to the second optical channel for transmission; and the MCU starts the radio frequency electro-optical conversion module and controls the optical switch to be switched to the first optical channel for transmission under the condition of poor communication of the optical link.
And the lower optical transceiver adopts a switching module for the multi-channel Ethernet signals, and sends the gigabit network electrical signals and the optical signals into a network switching chip for processing in different processing modes, so that the multi-channel gigabit Ethernet is accessed by a limited network port. And the other signals are subjected to photoelectric conversion in a wavelength division multiplexing mode to recover the electric signals transmitted by the optical transmitter and receiver.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting.

Claims (7)

1. The radio frequency signal photoelectric dual-link backup assembly is characterized by comprising an optical link, an electric link and an optical switch, wherein radio frequency electric input in the electric link forms a first optical channel in the optical switch through a radio frequency electric-optical switching module, radio frequency optical input in the optical link is divided into two groups of optical input branches through an optical branching device, one group of optical input branches forms a second optical channel in the optical switch, and the other group of optical input carries out photoelectric conversion of a PD detector assembly and is sent to an MCU for judgment after passing through a voltage comparator;
the radio frequency optical input and the radio frequency electric input are in a redundant backup mode and take the radio frequency optical input as a main guide, the MCU under the optical link cuts off the radio frequency electro-optical conversion module so as to block the second optical channel, and meanwhile, the MCU controls the optical switch to be switched to the second optical channel for transmission; and the MCU starts the radio frequency electro-optical conversion module and controls the optical switch to be switched to the first optical channel for transmission under the condition of poor communication of the optical link.
2. The digital-analog hybrid optical transmitter and receiver of claim 1, wherein the optical transmitter and receiver comprises a radio frequency signal photoelectric dual-link backup assembly, the optical transmitter and receiver further comprises an upper optical transmitter and receiver and a lower optical transmitter and receiver, and the upper optical transmitter and receiver and the lower optical transmitter and receiver realize bidirectional signal transmission through optical fibers.
3. The digital-analog hybrid optical transceiver of claim 2, wherein the optical transceiver performs electro-optic conversion on the input multiple RS422 signals, radar DBF data, multiple USB2.0 signals, multiple gigabit network signals, and radio frequency signals via SFP optical modules.
4. The digital-analog hybrid optical transmitter and receiver of claim 3, wherein said multiplexed RS422 signal is electro-optically converted by RS422 driver chip and serializer deserializer and SFP optical module;
the multi-path gigabit network signal is subjected to electro-optical conversion through a network transformer, a PHY physical layer chip and an SFP optical module;
the radar DBF data performs electro-optic conversion through a multimode optical module and an SFP optical module;
and the multipath USB2.0 signals are subjected to electro-optical conversion through a USB driving chip, an FPGA and an SFP optical module.
5. The digital-analog hybrid optical transceiver of claim 3, wherein the rf signal comprises an rf input and an rf output, the optical transceiver outputs the rf through an optical attenuator, a photodetector and a digitally controlled attenuation module, and the rf input is through an EDFA optical amplifier, an rf-to-optical conversion module and a low noise phase amplifier.
6. The digital-analog hybrid optical transceiver of claim 2, wherein the lower optical transceiver performs electro-optic conversion on the input multi-channel RS422 signal, radar DBF data, multi-channel USB2.0 signal, multi-channel gigabit network signal and radio frequency signal via SFP optical modules.
7. The digital-analog hybrid optical transceiver of claim 6, wherein the multi-gigabit network signals in the lower optical transceiver are subjected to electro-optical conversion by a plurality of network transformers, network switching chips, PHY physical layer chips and SFP optical modules.
CN202311472530.1A 2023-11-07 2023-11-07 Digital-analog hybrid optical transmitter-receiver for radio frequency signal electro-optical backup design Pending CN117527054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311472530.1A CN117527054A (en) 2023-11-07 2023-11-07 Digital-analog hybrid optical transmitter-receiver for radio frequency signal electro-optical backup design

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311472530.1A CN117527054A (en) 2023-11-07 2023-11-07 Digital-analog hybrid optical transmitter-receiver for radio frequency signal electro-optical backup design

Publications (1)

Publication Number Publication Date
CN117527054A true CN117527054A (en) 2024-02-06

Family

ID=89757844

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311472530.1A Pending CN117527054A (en) 2023-11-07 2023-11-07 Digital-analog hybrid optical transmitter-receiver for radio frequency signal electro-optical backup design

Country Status (1)

Country Link
CN (1) CN117527054A (en)

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