CN110365413A - A kind of light load radio frequency beam shaping system based on relevant frequency comb - Google Patents
A kind of light load radio frequency beam shaping system based on relevant frequency comb Download PDFInfo
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- CN110365413A CN110365413A CN201910592280.2A CN201910592280A CN110365413A CN 110365413 A CN110365413 A CN 110365413A CN 201910592280 A CN201910592280 A CN 201910592280A CN 110365413 A CN110365413 A CN 110365413A
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- frequency
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- frequency comb
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Classifications
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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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- 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
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/615—Arrangements affecting the optical part of the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
Abstract
The invention discloses a kind of, and the light based on relevant frequency comb carries radio frequency beam formation system; radio-frequency carrier signal is carried as light by relevant frequency comb signal; in conjunction with existing light carrier radio communication technology (ROF); to realize the remote transmission of signal; and pass through the true delay technique of dense wave division multipurpose combination optical array in radio frequency leading portion; it realizes high-precision phase shift function, and finally realizes the system of numerical model analysis wave beam forming.The system can be used in RF communication system, connect the base station unit and radio frequency beam figuration unit of millimetre-wave attenuator base station, compared with existing millimeter wave wave beam forming sender, greatly reduce the link volume and cost of radio frequency unit, integrated level, scalability and reliability are improved, RF application is carried in microwave photon and light and has great importance.
Description
Technical field
The light that the present invention relates to a kind of based on relevant frequency comb carries radio frequency beam and forms system, relate generally to microwave photon and
The communications field relates in particular to a kind of remote as light load radio-frequency carrier signal realization signal by relevant frequency comb light source
Transmission, and high-precision phase shift function is realized by the true delay technique of dense wave division multipurpose combination optical array in radio frequency leading portion, and
The final system for realizing numerical model analysis wave beam forming.
Background technique
In order to increase the transmission rate and coverage area of wireless transmission, the 5th Generation Mobile Communication System (5th
Generation mobile networks, abbreviation 5G) it is become closer to from formal commercialization.5G should be realized in transmission rate
Than fast ten times of 4G or more, i.e., the transmission rate of 5G can realize 1Gb/s.Existing frequently-used 5GHz frequency range below is gathered around very much
It squeezing, millimeter wave can efficiently solve many problems that high-speed wideband wireless access faces since its wavelength is short, bandwidth, by
The very big concern of mobile communication carrier is arrived.Because the wavelength of millimeter wave is shorter, it is possible to a large amount of in base station applies
Antenna, so that wave beam forming and space multiplexing technique based on extensive multiple-input, multiple-output (Massive MIMO) system become more
Flexibly.In existing Massive mimo system, generally the most commonly used is be based purely on number beam-forming system in, radio frequency
The quantity of chain is identical with number of antennas.But when number of antennas is very big, the radio frequency link of identical quantity is utilized in practice
It is not-so-practical.
The method for solving this problem is to utilize numerical model analysis wave beam forming.So-called numerical model analysis wave beam forming, refers to
On the basis of traditional numeric field wave beam forming, in the front end close to antenna system, increases level-one in radiofrequency signal and simulates figuration,
The phase of each antenna transmitting signal is controlled using the phase shifter of low cost, that is to say, that each beamformin coefficient possesses
Constant mould.For digital figuration, numerical model analysis wave beam forming is a kind of half-way house of performance and complexity,
Practical prospect with higher in the big bandwidth of high band or the very big system of antenna amount.
In existing mixed-beam technology, the implementation of analog beam figuration is usually the connection of each antenna element
One transceiver module and phase shifter, to realize the phase independent control in multiple channels, but this design due to active radio frequency it is logical
The problems such as road device count is more, and there are hardware complexity height, and calibration is complicated, and heat dissipation is difficult, at high cost, and with antenna element
Number increases, and complexity problem is more significant.Based on existing coherent light and wavelength-division multiplex technique, if can be based on
In multiple coherent signals of different frequency realize phase accurate control, then can greatly save beam-forming system cost and
Volume.
Summary of the invention
The invention aims to combine existing ROF technology, relevant frequency comb and the true delay technique of array optical, realize
It can be used for simulating or the light based on relevant frequency comb of a kind of low cost of mixed-beam figuration sender, small size carry rf wave
Beam shaping system.
In order to achieve the above object, the invention proposes a kind of, and the light based on relevant frequency comb carries radio frequency beam figuration system
System, the system contain frequency comb transmitting module and frequency comb receiving module；Wherein frequency comb transmitting module contains continuous light
Light source, frequency comb generate unit, optical filter, radio-frequency modulations unit, image intensifer, for generating relevant frequency comb signal and adding
Rf communication signal is carried, which is connected by optical fiber with frequency comb receiving unit, and realizes light by optical fiber
The long distance transmission of carrier signal；Frequency comb receiving module contains optical filter, wavelength-division multiplex unit, array light delay list
Member, array photo detector；For being divided to the optical carrier that receives, and load on the optical signal of different frequency not co-extensive
When, then convert back radio-frequency carrier signal；The radio-frequency carrier signal can send radio-frequency front-end and antenna element to, and pass through battle array
Array antenna realizes wave beam forming function.
Further, the invention proposes the implementation methods that above-mentioned radio frequency optical transmission system may be implemented, wherein the light
Continuous radiant in frequency comb transmitting module, light source implementation method can be but not limited to the semiconductors such as DFB, VCSEL, FP and swash
Light device chip, is also possible to solid state laser or optical fiber laser etc., steady for providing narrow linewidth, frequency for frequency comb generation unit
Fixed continuous optical signal；Frequency comb in the frequency comb transmitting module generates unit, and its implementation can be but not limited to base
Generation device is combed in the frequency of highly nonlinear optical fiber or high q-factor micro-ring resonator, for the frequencies spacing, relevant optical frequency such as generating
Signal is combed, which should include at least the comb teeth that 8 power grade differences are less than 1dB；Penetrating in the frequency comb transmitting module
Frequency modulation unit, its implementation can be but not limited to the modulators such as Mach-Zehnder, electric absorption, micro-loop, three dB bandwidth
Handled radio frequency signal frequency should be not less than, for radio-frequency carrier signal to be loaded into frequency comb signal, be converted to light load
Radio-frequency carrier signal；The continuous radiant and frequency comb generate unit can be the methods of integrated by heterogeneous integrated or encapsulation,
Realize miniaturization；Optical filter in the frequency comb transmitting module can be but not limited to the types such as micro-loop, optically filtering piece
Optical filter, for filtering the spurious signal of other optical frequencies；Image intensifer in the frequency comb transmitting module is realized
Method can be but not limited to the semiconductor optical amplifiers such as EDFA, OSA；Radio-frequency carrier signal is carried for amplifying light.
Wherein the wavelength-division multiplex unit in the frequency comb receiving module, its implementation can be but not limited to array
Waveguide optical grating, filter plate etc. for the relevant frequency comb carrier signal of multi-wavelength to be separately independent optical carrier, and pass
Send to array light delay unit and array photo detector；Light delay unit in the frequency comb receiving module is realized
Method can be but not limited to integrated optical waveguide and array of photoswitch, true for realizing high precision electric control or thermal control adjustable optical
Delay；Optical detector in the frequency comb receiving module, its implementation can be but not limited to the semiconductors such as APD, PIN
High speed photodetector, three dB bandwidth should be not less than handled radio frequency signal frequency, for the light to be carried radio-frequency carrier signal
It is demodulated into radio-frequency carrier signal.The signal can amplify by PA after radio-frequency filter filters out band stray and be sent to day
Line unit.
A kind of light based on relevant frequency comb of the present invention carries radio frequency beam shaping system and forming method thereof, utilizes
The coherence of frequency comb signal, in conjunction with existing light carrier radio communication technology (ROF), it can be achieved that the length of coherent light signal away from
From transmission；Meanwhile based on wavelength-division multiplex technique and the true delay technique of optics, it can be achieved that the frequency dividing and multi-channel time-delay of coherent signal are believed
Number accurate control.The system can be used in RF communication system, connect the base station unit and rf wave of millimetre-wave attenuator base station
Beam figuration unit, compared with existing millimeter wave wave beam forming sender, greatly reduce radio frequency unit link volume and at
This, improves integrated level, scalability and reliability.RF application is carried in microwave photon and light to have great importance.
Detailed description of the invention
The following are the explanations of attached drawing part:
Fig. 1 is that the present invention is based on the overall structure block diagrams that the light of relevant frequency comb carries radio frequency beam shaping system
Fig. 2 is the structural block diagram of light emitting unit in the present invention
Fig. 3 is the structural block diagram of light receiving unit in the present invention
Fig. 4 is Figure of abstract, and content is that the present invention is based on the overall structures that the light of relevant frequency comb carries radio frequency beam shaping system
Block diagram
The meaning of each appended drawing reference see the table below in figure:
Specific embodiment
As shown in Figure 1, a kind of light based on relevant frequency comb carries radio frequency beam shaping system, which includes that scene can compile
Journey gate array or application-specific integrated circuit (FPGA/ASIC) 1, D/A converter module (DAC) 2, optical transmitter module (OTX) 3,
Optical receiver module (ORX) 4 and radio frequency leading portion (AFE) 5, wherein FPGA/ASIC 1, DAC 2, OTX 3 are located at Base Band Unit, and one
As can be placed on indoor data center, ORX 4, AFE 5 are located at radio frequency remote base station unit, and optical transmitter module 3 and light connect
It receives module 4 and realizes that remotely connected and signal transmits by optical fiber.
Wherein, as shown in Fig. 2, in optical transmitter module 3, continuous light source 301 can be realized by DFB semiconductor laser, light
Frequency comb generation system 302 can be realized by high q-factor micro-ring resonant cavity, and realize heterogeneous collection by being bonded with continuous light source 301
At, the optical signal that the wavelength by Distributed Feedback Laser output is 1550nm can be coupled to micro-ring resonant cavity by optical lens, and
In a series of intracavitary relevant frequency comb signal for generating equal frequency intervals due to nonlinear effect of high q-factor micro-ring resonant, the signal
It transmits into electrooptic modulator 303, electrooptic modulator 303 can be realized by silicon substrate Mach-Zehnder modulators, pass through Electro-optical Modulation
Device 303 will need the radio-frequency carrier signal transmitted to be loaded on frequency comb signal, and radio frequency carrier frequency is 28GHz or so, support
Carrier bandwidths can be 100MHz ~ 1GHz, become light and carry radio-frequency carrier signal, the signal is fine by Lens Coupling entering light, then leads to
Optical filter 304 is crossed, the signal of high and low frequency is filtered out, only retains 8 comb teeth signals similar in intermediate amplitude；Light carries radio frequency and carries
Wave signal, by fiber coupling entering light amplifier 305, is drawn after amplification by long-distance optical fiber after the filtering of wave filter
As far as the base station unit at website determined by the network planning.
Optical receiver module 4 is integrated in base station unit, and the filter 401 being connected with optical fiber is used to filter image intensifer generation
Bottom is made an uproar, and is retained required frequency comb comb teeth signal, is then connected to wavelength division multiplexer 402 by optical fiber, wavelength division multiplexer 402 can
To realize the branch for comb teeth signal using array waveguide grating, and respectively enter the 8 true delay units of road optics (TTD) 403
In.In TTD 403, optical signal realizes the difference to input optical signal on different channels by adjustable more bit optical time delay units
Delay volume, and then achieve the purpose that light carries radiofrequency signal phase accuracy controlling.Then the light after phase regulates and controls carries radio frequency letter
It number is coupled in optical detector (PD) 404, high speed PIN optical detector can be used in optical detector, is penetrated light load by photoelectric conversion
Frequency signal is converted to radiofrequency signal, and is coupled out by radio frequency microstrip.The radiofrequency signal is coupled into AFE(analog front end) (AFE) 5
In, band stray can be filtered out by radio frequency band filter, required power grade is then amplified to by PA, finally using
Rf filtering can realize the directional transmissions of beamformed signals by Anneta module.
It since these light carry radiofrequency signal is formed by frequency comb signal beam splitting, their phase coherence can greatly simplify
Calibrate process.
In practical applications, above-mentioned frequency comb signal can also be emitted and receiving module carries out multi-channel parallel, it is different
It is used for transmission different radio-frequency carrier signals on channel, combines, can be realized with optics the realized phase controlling that is really delayed
Mixed-beam figuration.
It above are only preferred embodiments of the invention, all variations and change applying for a patent essence according to the present invention and being done
Shape should fall within the scope of protection of the appended claims of the present invention.
Claims (7)
1. a kind of light based on relevant frequency comb carries radio frequency beam shaping system, it is characterised in that: including frequency comb transmitting module
With frequency comb receiving module；Wherein, frequency comb transmitting module include continuous radiant, frequency comb generate unit, radio-frequency modulations unit,
Optical filter, image intensifer；Wherein, frequency comb generates unit and generates relevant frequency comb signal；What frequency comb generation unit generated etc.
Frequency spacing, relevant frequency comb signal include at least the comb teeth that 8 power grade differences are less than 1dB；Frequency comb generates unit and adopts
With based on highly nonlinear optical fiber or high q-factor micro-ring resonator；Frequency comb receiving module includes that wavelength-division multiplex unit, array light prolong
Shi Danyuan, array photo detector and optical filter；Wherein, wavelength-division multiplex unit divides the optical carrier received, battle array
Column light delay unit loads different delays on the optical signal of different frequency.
2. light as described in claim 1 carries radio frequency beam shaping system, it is characterised in that: frequency comb transmitting module passes through optical fiber
It is connected with frequency comb receiving unit.
3. light as described in claim 1 carries radio frequency beam shaping system, it is characterised in that: continuous radiant is swashed using semiconductor
Light device chip, solid state laser or optical fiber laser.
4. light as described in claim 1 carries radio frequency beam shaping system, it is characterised in that: radio-frequency modulations unit uses Mach-
Zeng Deer modulator, electroabsorption modulator or micro-loop modulator.
5. light as described in claim 1 carries radio frequency beam shaping system, it is characterised in that: wavelength-division multiplex unit uses array wave
Guide grating or filter plate.
6. light as described in claim 1 carries radio frequency beam shaping system, it is characterised in that: array light delay unit is using integrated
Optical waveguide or array of photoswitch, be really delayed for realizing high precision electric control or thermal control adjustable optical.
7. a kind of light based on relevant frequency comb carries the forming method of radio frequency beam shaping system, including appoints in claim 1-6
Light described in one based on relevant frequency comb carries radio frequency beam shaping system, further include using field programmable gate array or
Application-specific integrated circuit, D/A converter module, optical transmitter module, optical receiver module and radio frequency leading portion, wherein can by scene
Programming gate array or application-specific integrated circuit, D/A converter module, optical transmitter module are set to Base Band Unit, by light-receiving
Module and radio frequency leading portion are set to radio frequency remote base station unit, wherein optical transmitter module and optical receiver module pass through optical fiber reality
Existing remotely connected and signal transmission.
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| CN201910592280.2A CN110365413A (en) | 2019-07-03 | 2019-07-03 | A kind of light load radio frequency beam shaping system based on relevant frequency comb |
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| CN201910592280.2A CN110365413A (en) | 2019-07-03 | 2019-07-03 | A kind of light load radio frequency beam shaping system based on relevant frequency comb |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181002A (en) * | 2020-01-06 | 2020-05-19 | 上海交通大学 | High-speed VCSEL array integration method and system based on injection locking technology |
| CN111181683A (en) * | 2020-01-08 | 2020-05-19 | 中国船舶重工集团公司第七二四研究所 | Device and design method of ultra-wideband receiver based on microwave photons |
| CN111431616A (en) * | 2020-03-31 | 2020-07-17 | 联合微电子中心有限责任公司 | Tunable true delay device and adjusting method |
| CN111541510A (en) * | 2020-04-15 | 2020-08-14 | 电子科技大学 | Multi-cell beam forming method of 5G forwarding network |
| CN112099048A (en) * | 2020-11-12 | 2020-12-18 | 之江实验室 | Microwave photon MIMO radar detection method and system based on time division-difference frequency multiplexing |
| CN112180385A (en) * | 2020-09-25 | 2021-01-05 | 中国电子科技集团公司第十一研究所 | Cascaded laser signal frequency modulation method and device |
| CN112737673A (en) * | 2020-12-28 | 2021-04-30 | 重庆邮电大学 | Transient weak microwave signal spectrum optical detection method and device under noise |
| CN114639957A (en) * | 2022-03-14 | 2022-06-17 | 中国电子科技集团公司第十研究所 | Digital-analog mixed multi-beam forming vehicle-mounted device and phase-shifting wave control method thereof |
| WO2024055295A1 (en) * | 2022-09-16 | 2024-03-21 | 华为技术有限公司 | Signal processing method and apparatus, and communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111181002A (en) * | 2020-01-06 | 2020-05-19 | 上海交通大学 | High-speed VCSEL array integration method and system based on injection locking technology |
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| CN112737673B (en) * | 2020-12-28 | 2023-11-03 | 重庆邮电大学 | Method and device for optical detection of transient weak microwave signal spectrum under noise |
| CN114639957A (en) * | 2022-03-14 | 2022-06-17 | 中国电子科技集团公司第十研究所 | Digital-analog mixed multi-beam forming vehicle-mounted device and phase-shifting wave control method thereof |
| CN114639957B (en) * | 2022-03-14 | 2023-08-08 | 中国电子科技集团公司第十研究所 | Digital-analog mixed multi-beam shaping vehicle-mounted device and phase-shifting wave control method thereof |
| WO2024055295A1 (en) * | 2022-09-16 | 2024-03-21 | 华为技术有限公司 | Signal processing method and apparatus, and communication device |
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Application publication date: 20191022 |