CN110190889A - A kind of implementation method of the earth station system based on Microwave photonics - Google Patents
A kind of implementation method of the earth station system based on Microwave photonics Download PDFInfo
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- CN110190889A CN110190889A CN201910382134.7A CN201910382134A CN110190889A CN 110190889 A CN110190889 A CN 110190889A CN 201910382134 A CN201910382134 A CN 201910382134A CN 110190889 A CN110190889 A CN 110190889A
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
-
- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
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- Computer Networks & Wireless Communication (AREA)
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- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of implementation methods of earth station system based on Microwave photonics, the multi-band signal that antenna is received, after low-noise amplifier exports, optical fiber transmission, photon mixing, photodetection and sampling are carried out, general signal processing equipment is input to and is handled.The uplink that wideband adjustable optical-electronic oscillator generates Low phase noise emits signal, emits through the hollow slip ring of excessive power through antenna.Single laser external modulator is completed at the same time electricity-light conversion and photon mixing function.The system design of and ultra wide band unrelated with frequency (covering is from S frequency range to Ka frequency range) can be achieved in the present invention, improves versatility, the integrated level of equipment, equipment volume is small, electromagnetic-radiation-free, strong antijamming capability, stability is high, is conducive to improve equipment dependability and maintainability；For the total digitalization of measuring and controlling equipment, generalization, software implementation, restructural blaze the trail, the integrated design of radar and communications is realized.
Description
Technical field
The invention belongs to electronics industry satellite communication fields, and in particular to a kind of earth station system based on Microwave photonics
Implementation method.
Background technique
With the development of aerospace industry, more systems, multiband become the development trend of space flight measurement and control and communication system, and
Often for requiring single device that can support multiple frequency ranges and a variety of systems simultaneously.A set of observing and controlling and communication equipment need integrated original
Carry out the functions of covering equipment more.Meanwhile to improve equipment on-road efficiency and system equipment redundancy backup ability, the resource of measuring and controlling equipment
Dynamic reorganization is the following important developing direction.
Under this development trend, traditional electronics design method is faced with huge challenge:
(1) each frequency range requires individual radio frequency link, system bulky complex；
(2) transmission of multi-channel rf signal and intermediate-freuqncy signal needs extremely complex slip ring.Under severe marine environment,
The reliability of system is low, high failure rate；
(3) when multiband works at the same time, mutual electromagnetic interference is by serious system for restricting performance；Traditional electronics is set
The ability that meter method resists extraneous malicious interference is poor.
(4) it is restricted by radio-frequency cable insertion loss, the freedom degree very little of equipment cabin layout.
(5) the resource dynamic reorganization of measuring and controlling equipment needs large-scale RF switch matrix, but with the liter of working frequency range
High and switch matrix scale increases, and radio frequency insertion loss can greatly increase, and tradable radio frequency number is limited；Temperature change meeting
Introduce the unstable of phase and group delay；In order to compensate for insertion loss, multistage amplifier circuit is generallyd use, more property can be introduced
It can unstable elements；The isolation of multiple signals and interference problem are prominent；
In addition, meeting the needs of deep space exploration task to increase systemic effect distance, it is desirable that TT&C system has higher
G/T value.However, increase antenna aperture effect expense than extremely low,
Microwave photonics are the emerging research fields of a research and utilization optical means processing microwave signal, are related to microwave letter
Number generation, processing, control and light carry many aspects such as radio frequency transmission.Microwave photon technology is high with precision, Insertion Loss is low, anti-electricity
Many advantages, such as magnetic disturbance, and can realize direct sampling, the quantization of microwave and millimeter-wave signal, it is able to achieve phased-array radar
True delays time to control.
Two research fields of optics and radar are combined, microwave photon technology is applied among radar, is current generation
Various countries, boundary competitively put into the research hotspot of huge fund.Microwave photon radar is the large-scale array day that control has thousands of a array elements
Line provides possibility, can be realized the interconnection between the antenna of future terrestrial, carrier-borne and airborne phased array radar and communication system,
With huge application potential.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of boat based on Microwave photonics for the above-mentioned prior art
The implementation method of its earth station system can be such that the integrated level, versatility, reliability of measuring and controlling equipment further enhances, make observing and controlling
The system noise temperature of equipment further decreases, and makes it possible the fully digitalization of measuring and controlling equipment.
The present invention solves the above problems used technical solution are as follows: a kind of earth station system based on Microwave photonics
Implementation method, the multi-band signal from spacecraft are respectively formed each frequency range after antenna receives, and through feed network
With road and poor road signal, amplifies, be input in photon down conversion device, under photon by the low-noise amplifier of different frequency range
Frequency converter generates the light wave for carrying intermediate-freuqncy signal after frequency conversion；Different frequency ranges are utilized respectively difference by light wavelength division multiplexing
Optical wavelength transmitted using wave division multiplex mode using optical fiber, computer room is input to by smooth ring by optical circulator
It is interior；After the light wavelength division multiplexing in computer room, the corresponding optical wavelength of each frequency range is taken out, passes through optical circulator, input respectively
Photoelectric conversion is carried out to photodetector, the intermediate frequency electric signal after conversion is further converted to standard interface frequency, by mould
Quasi--digital conversion, is converted to digital signal, is input to general digital domain signal processing unit and is handled；Low phase noise
Low phase noise uplink signal required for optical-electronic oscillator generates, the uplink signal of each frequency range using different wave length light wave into
Row transmission, using wave division multiplex mode by optical fiber, after smooth ring, the photon down conversion device into antenna end assists completing
The frequency conversion of downlink signal.
Preferably, the photon down conversion device utilizes single laser external modulator, is completed at the same time electro-optic conversion and photon is mixed
The function of frequency is modulated with the light wave of upstream radio-frequency signal and the radiofrequency signal of downlink while being input to a M-Z modulator, passes through
The modulation and beat of laser act on, and generate the light wave for carrying intermediate-freuqncy signal after frequency conversion.
Preferably, transmission technology is carried using radio frequency light, after electromagnetic signal is modulated to light wave, light wave is carried out by optical fiber
Transmission.
Compared with the prior art, the advantages of the present invention are as follows:
(1) the system design that and ultra wide band unrelated with frequency (covering is from S frequency range to Ka frequency range) can be achieved, improves equipment
Versatility, integrated level, equipment volume is small, electromagnetic-radiation-free, strong antijamming capability, and stability is high, and being conducive to improve equipment can
By property and maintainability；
(2) complicated radio frequency and Mid-Frequency Slip Rings are eliminated, the upper and lower frequency conversion equipment of huge radio frequency is eliminated, reduces and set
Standby research and development cost, improves the reliability of system；
(3) the problems such as radio-frequency cable can be overcome to insert high loss, phase drift, amplitude shift in transmission.
(4) the radio frequency exchange network based on photon technology can be achieved, it is limited to solve electronic device RF switch matrix size
With the problem of stability difference.
(5) the secondary noise dispersion in side-tone ranging can be eliminated, is conducive to improve range accuracy；The optical-electronic oscillator of Low phase noise
Be conducive to improve rate accuracy；The down channel of Low phase noise is conducive to improve telemetering performance；
(6) it is total digitalization, the generalization, software implementation, restructural blaze the trail of measuring and controlling equipment, realizes radar and communications
Integrated design；
(7) it is convenient for the realization of antenna array.
Detailed description of the invention
Fig. 1 is the system design frame chart of the embodiment of the present invention；
Fig. 2 is the photonic modulation schematic diagram of the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Figs. 1-2, earth station system of one of the present embodiment based on Microwave photonics, including it is installed on antenna
Low-noise amplifier, photon down conversion device, antenna side optical circulator, antenna side light wavelength division multiplexing and the smooth ring at end, and
Computer room sidelight wavelength division multiplexer, computer room sidelight circulator, photodetector, auxiliary converter, the modulus being mounted in computer room turn
Change device, digital domain signal processing module and low phase noise optical-electronic oscillator.
Multi-band signal (S frequency range, C frequency range, X frequency range, Ka frequency range) from spacecraft passes through after antenna receives
Feed network is respectively formed each frequency range and road and poor road signal.It is amplified by the low-noise amplifier of different frequency range, it is defeated
Enter into photon down conversion device.
Photon down conversion device is completed at the same time electro-optic conversion and photon mixing function, be modulated with upstream radio-frequency signal light wave and
The radiofrequency signal of downlink is input to a M-Z modulator simultaneously, is acted on by the modulation and beat of laser, generates a carrying and becomes
The light wave of intermediate-freuqncy signal after frequency.Different frequency ranges is utilized respectively different optical wavelengths, after antenna side light wavelength division multiplexing,
It is transmitted using optical fiber, is input in computer room by optical circulator by smooth ring.
After light wavelength division multiplexing, the corresponding optical wavelength of each frequency range is taken out, respectively by optical circulator, is input to light
Electric explorer carries out photoelectric conversion.Intermediate frequency electric signal after conversion is further converted to standard interface frequency, by simulation-number
Word transformation, is converted to digital signal, is input to general signal processing unit and is handled.
Low phase noise uplink signal required for low phase noise optical-electronic oscillator generates.The uplink signal of each frequency range is adopted
It is transmitted with the light wave of different wave length, using wave division multiplex mode by optical fiber, after smooth ring, into the light of antenna end
Sub- low-converter auxiliary completes the frequency conversion of downlink signal.As needed, power amplifier can also be transmitted to amplify and emit.
(1) photon down conversion device (M-Z modulator)
The present invention utilizes single laser external modulator, is completed at the same time the function of electro-optic conversion and photon mixing.It is modulated with
The light wave of row radiofrequency signal and the radiofrequency signal of downlink are input to a M-Z modulator simultaneously, pass through the modulation and beat of laser
Effect generates the light wave for carrying intermediate-freuqncy signal after frequency conversion.
(2) optical circulator
The effect of optical circulator is to ensure that light wave can only be transmitted by given direction (clockwise or counterclockwise), to guarantee
Isolation between two-way light wave；
(3) light wavelength division multiplexing
The effect of light wavelength division multiplexing is by the lightwave signal of multiple wavelength while to pass through optical fiber all the way and transmit.
(4) optical fiber
The present invention carries transmission technology using radio frequency light, and after electromagnetic signal is modulated to light wave, light wave is carried out by optical fiber
Transmission.Compared to optical fiber telecommunications system, the transmission range in earth station system is generally relatively close, therefore the choice of optical maser wavelength is more
Greatly, be conducive to the transmission that multiple frequency band signals are realized by optical wavelength division multiplexing；
(5) smooth ring
The present invention realizes lightwave signal interrupted transmission when antenna rotation using conventional optical fiber slip ring.
(6) photodetector
The present invention completes the conversion of light wave and electric wave using conventional photodetection diode.
(7) auxiliary converter
The further frequency conversion of the electric wave signal received is transformed to general interface frequency (70MHz) by auxiliary converter.
(8) ADC (analog-to-digital conversion circuit)
ADC completes the sample quantization to analog if signal, generates Serial No..
(9) digital domain signal is handled
The present invention uses general digital signal processing unit, completes to the transformation of digital signal, processing, demodulation, display
Equal work.
(10) optical-electronic oscillator
Laser energy is converted to microwave signal energy using photoelectric feedback loop technology by optical-electronic oscillator, has benefited from optical fiber
The very low loss of medium can use relatively long optical fiber delay cable architecture, and resonant tank can obtain very high Q value,
Phase noise characteristic is finally limited solely by the relative intensity noise of laser.
The present invention uses the optical-electronic oscillator frequency regulation scheme based on wideband light source and variable delay line, system structure letter
It is single, frequency of oscillation tuning is realized by light delay device, has the system performance of Low phase noise concurrently.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiments
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (3)
1. a kind of implementation method of the earth station system based on Microwave photonics, it is characterised in that: from the more of spacecraft
Frequency band signals after antenna receives, and be respectively formed each frequency range through feed network and road and poor road signal, by different frequency range
Low-noise amplifier amplify, be input in photon down conversion device, photon down conversion device generate a carrying frequency conversion after in
The light wave of frequency signal；Different frequency ranges is utilized respectively different optical wavelengths by light wavelength division multiplexing, using wavelength-division multiplex side
Formula is transmitted using optical fiber, is input in computer room by optical circulator by smooth ring；By the light wavelength division multiplexing in computer room
Afterwards, the corresponding optical wavelength of each frequency range is taken out, respectively by optical circulator, photodetector is input to and carries out photoelectric conversion, turn
Intermediate frequency electric signal after changing further is converted to standard interface frequency, converts by Analog-digital, is converted to digital signal, defeated
Enter to general digital domain signal processing unit and is handled；Low phase required for low phase noise optical-electronic oscillator generates is made an uproar
The uplink signal of sound uplink signal, each frequency range is transmitted using the light wave of different wave length, passes through light using wave division multiplex mode
Fibre completes the frequency conversion of downlink signal into the photon down conversion device auxiliary of antenna end after smooth ring.
2. a kind of implementation method of earth station system based on Microwave photonics according to claim 1, it is characterised in that:
The photon down conversion device utilizes single laser external modulator, is completed at the same time the function of electro-optic conversion and photon mixing, is modulated with
The light wave of upstream radio-frequency signal and the radiofrequency signal of downlink are input to a M-Z modulator simultaneously, pass through the modulation and difference of laser
Bat effect generates the light wave for carrying intermediate-freuqncy signal after frequency conversion.
3. a kind of implementation method of earth station system based on Microwave photonics according to claim 1 or 2, feature exist
In: transmission technology is carried using radio frequency light, after electromagnetic signal is modulated to light wave, light wave is transmitted by optical fiber.
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| CN201811314442 | 2018-11-06 | ||
| CN2018113144428 | 2018-11-06 |
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Cited By (2)
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| CN113376616A (en) * | 2021-06-01 | 2021-09-10 | 杭州视光半导体科技有限公司 | AWG-based laser radar scanning system |
| CN116381597A (en) * | 2023-05-29 | 2023-07-04 | 成都唯博星辰科技有限公司 | Broadband single-channel direction finding system and implementation method |
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| CN113376616A (en) * | 2021-06-01 | 2021-09-10 | 杭州视光半导体科技有限公司 | AWG-based laser radar scanning system |
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| CN116381597A (en) * | 2023-05-29 | 2023-07-04 | 成都唯博星辰科技有限公司 | Broadband single-channel direction finding system and implementation method |
| CN116381597B (en) * | 2023-05-29 | 2023-08-25 | 成都唯博星辰科技有限公司 | Broadband single-channel direction finding system and implementation method |
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