CN109905177A - Radio digital communication receiving antenna and its method based on the relevant conversion of microwave light wave - Google Patents
Radio digital communication receiving antenna and its method based on the relevant conversion of microwave light wave Download PDFInfo
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Abstract
The invention discloses a kind of radio digital communication receiving antennas and its method based on the relevant conversion of microwave light wave, wherein communications reception antenna includes laser, digital signal tune device, caesium bubble, bundling device, photodetector and digital signal demodulator, wherein laser is for generating local oscillator light needed for optical heterodyne detection, digital signal demodulator is by digital signal modulated to microwave, microwave modulation conversion is brewed light wave by caesium bubble, local oscillator light and brewed light wave are overlapped by bundling device, generate optical heterodyne signal, photodetector receives optical heterodyne signal, digital signal demodulator is for reverting to digital signal from optical heterodyne signal.The present invention utilizes the relevant conversion of microwave and light wave during Rydberg atom six-wave mixing, phase-modulation of the digital signal to microwave is converted to the phase-modulation to light wave, coherent demodulation is carried out to restore digital signal, to realize digital communication to brewed light wave by optical heterodyne demodulation method.
Description
Technical field
The present invention relates to a kind of antenna and its communication means more particularly to a kind of based on the wireless of the relevant conversion of microwave light wave
Digital communication receiving antenna and Wireless digital communication method based on the relevant conversion of microwave light wave.
Background technique
2012, the Pfau study group of the Shaffer study group and Stuttgart university, Germany of Oklahoma university, the U.S.
Cooperation is divided using hot Rydberg atom EIT and AT for the first time, converts optical frequency measurement for the measurement of microwave electric field intensity, real
Testing realizes microwave electric field measurement, and the field minimum intensity measured is 8 μ Vcm-1, sensitivity is 30 μ Vcm-1Hz-12.2018
The David H. study group of Maryland university, the U.S. carries out digital communication, channel capacity using hot atom EIT-AT separating phenomenon
For 8.2Mbit/s.The same year, the six-wave mixing process of the Li Wenhui study group first passage Rydberg atom of National University of Singapore
The relevant conversion from microwave to light wave, switching bandwith about 6MHz are realized, and conversion process is not limited by intensity, it can work in principle
Make the level in microwave single photon.
Currently, experiment measurement and theoretical analysis shows that, the digital communication based on hot atom EIT-AT separating phenomenon can only lead to
Amplitude modulation progress is crossed, the transmission of information can not be carried out by phase-modulation；Channel capacity is excited optical linewidth, gets over exhibition simultaneously
The factors limitation such as wide, shot noise and Rydberg atom decoherence.The present invention is not measured in principle by atom system quantum
The limitation of the limit, receiving sensitivity are close to single photon level, greatly improve the channel capacity of digital communication.Furthermore the present invention both
The transmitting that information can also be carried out by phase-modulation by amplitude modulation is expected to expand to phase control techniques.
Summary of the invention
In order to solve the defect of the above-mentioned prior art, simple, high sensitivity that purpose of the present invention is to provide a kind of structures,
It is strong with roomy, feasibility and be easy to the practical radio digital communication receiving antenna based on the relevant conversion of microwave light wave and its side
Method.
A kind of radio digital communication receiving antenna based on the relevant conversion of microwave light wave, including laser, digital signal system
Adjust device, caesium bubble, bundling device, photodetector and digital signal demodulator, in which:
Laser is for generating local oscillator light needed for optical heterodyne detection；
Digital signal demodulator is by digital signal modulated to microwave；
Microwave modulation conversion is brewed light wave by caesium bubble；
Above-mentioned local oscillator light and above-mentioned brewed light wave are overlapped by bundling device, generate optical heterodyne signal；
Photodetector receives optical heterodyne signal；
Digital signal demodulator is for reverting to digital signal from above-mentioned optical heterodyne signal.
When being communicated, using digital signal modulated device by digital signal modulated to microwave, the caesium as receiving transducer steeps
After receiving brewed microwave, in Cs atom occur six-wave mixing process brewed microwave is coherently converted to it is modulated
Light wave processed carries out optical heterodyne detection, the optical heterodyne signal that photodetector will be detected to brewed light wave by bundling device
It send to digital signal demodulator and is demodulated, digital signal is restored by digital signal demodulator, finally complete communication.
Preferably, the Cs atom gas under room temperature saturated vapor is provided in caesium bubble, Cs atom gas is mixed in six wave of Rydberg
Microwave is modulated into brewed light wave during frequency.
Preferably, digital signal modulated device will be on digital signal modulated to microwave signal by phase-shift keying (PSK) modulation.Phase shift
Keying modulation includes BPSK modulation, QPSK modulation and 8PSK modulation, is modulated by IQ so that the out of phase of microwave represents difference
Digital signal.
Digital signal demodulator is made of mlultiplying circuit, low-pass filter circuit and sampling decision circuit, utilizes mlultiplying circuit
Respectively by the radiofrequency signal of sinusoidal model and cosine mode and optical heterodyne signal multiplication, I/Q signal wave is restored by low-pass filter
Shape restores digital signal finally by sampling decision circuit.
Mlultiplying circuit has carried out multiplication operation of the radiofrequency signal in time domain of I/Q signal and sinusoidal model and cosine mode.Just
String mode refers to that the sine wave is consistent with the frequency of optical heterodyne signal with the frequency of cosine wave with the radiofrequency signal of cosine mode.
Low-pass filter circuit only allows the I/Q signal of low frequency to pass through, to restore I/Q signal waveform；It is real to sample decision circuit
Existing I/Q signal amplitude is corresponding with digital signal, completes the recovery of digital signal.
The present invention also provides a kind of Wireless digital communication methods based on the relevant conversion of microwave light wave, including following step
It is rapid:
1) it is modulated by phase-shift keying (PSK) on digital signal modulated to microwave using digital signal modulated device；
2) microwave passes through in horn launch to caesium bubble；
3) the Cs atom gas under warm saturated vapor is provided in caesium bubble, Cs atom gas is during Rydberg six-wave mixing
Microwave is modulated into brewed light wave；
4) brewed light wave is demodulated by optical heterodyne coherent demodulation method, reverts to digital signal.
Wherein, in step 4) optical heterodyne coherent demodulation method the following steps are included: by bundling device generate optical heterodyne signal, light
The optical heterodyne signal detected is sent to digital signal demodulator and is demodulated by electric explorer, restores number by digital signal demodulator
Word signal.
Preferably, the step of bundling device generation optical heterodyne signal includes: needed for being generated in optical heterodyne detection by laser
Local oscillator light, bundling device local oscillator light and brewed light wave are overlapped after generate optical heterodyne signal.
The present invention have compared with the existing technology it is following the utility model has the advantages that
1, the present invention is based on the radio digital communication receiving antennas of the relevant conversion of microwave light wave and its method, receiving end to make
With atom receiving end, for the receiving antenna using metal receiving end, atom receiving end avoids thermal noise.
2, the present invention is based on the radio digital communication receiving antenna and its method of the relevant conversion of microwave light wave, method is combined
Rydberg atom six-wave mixing process, channel bands 1GHz-1THz, channel width are about 6MHz.By shannon formulaKnow that when signal-to-noise ratio is higher, channel capacity is bigger when bandwidth is bigger.Thus using former based on Rydberg
The receiving antenna of sub- six-wave mixing process substantially increases the channel capacity of wireless channel, and can be used for multiplexing technique, into
Row multichannel, quick parallel communications.
It 3, both can be to amplitude the present invention is based on the radio digital communication receiving antenna and its method of the relevant conversion of microwave light wave
The microwave of modulation can also demodulate the microwave of phase-modulation, and receiving sensitivity is close to microwave single photon water in principle
It is flat.
4, the present invention is based on the radio digital communication receiving antennas and its method of the relevant conversion of microwave light wave, as receiving end
Caesium bubble, size reduction can't reduce channel capacity, thus be easy to carry out miniaturization and it is integrated, it is small for current device
It in the type epoch, has broad application prospects and scientific research value.
Detailed description of the invention
Fig. 1 is that the present invention is based on the radio digital communication receiving antenna structural schematic diagrams of the relevant conversion of microwave light wave.
Fig. 2 is that the present invention is based on the radio digital communication receiving antenna level structure schematic diagrames of the relevant conversion of microwave light wave.
Specific embodiment
As shown in Figure 1, the radio digital communication receiving antenna based on the relevant conversion of microwave light wave of the present embodiment, including packet
Include laser 4, digital signal tune device 18, caesium bubble 2, bundling device 5, photodetector 6 and digital signal demodulator 7.Number letter
Number system adjusts device 18 by digital signal modulated to microwave 1, and loudspeaker 19 will be in brewed Microwave emission to caesium bubble 2.Caesium bubble 2, is used for
The Cs atom gas of room temperature saturated vapor pressure is provided, which is used to make modulated in Rydberg six-wave mixing process
Microwave 1 processed is converted into brewed light wave 3.Laser 4 will be originally for generating local oscillator light needed for optical heterodyne detection, bundling device 5
Vibration light and brewed light wave 3 are overlapped, and generate optical heterodyne signal；Photodetector 6 receives optical heterodyne signal；Digital signal solution
Adjust device 7 for reverting to digital signal from above-mentioned optical heterodyne signal.
Caesium when being communicated, using digital signal modulated device 18 by digital signal modulated to microwave 1, as receiving transducer
Bubble 2 receive brewed microwave 1 after, in Cs atom during Rydberg six-wave mixing occurs by brewed 1 phase of microwave
Brewed light wave 3 is converted to dryly, optical heterodyne detection is carried out to brewed light wave 3 by bundling device 5, photodetector 6 is by institute
The optical heterodyne signal detected, which is sent to digital signal demodulator 7, to be demodulated, and restores digital signal by digital signal demodulator, most
Communication is completed afterwards.
Wherein, digital signal modulated device 18 is believed digital signal modulated to microwave by phase-shift keying (PSK) modulation, i.e. PSK modulation
On number.Above-mentioned PSK modulation, including BPSK modulation, QPSK modulation and 8PSK modulation etc., mainly by IQ modulation so that microwave not
Same-phase represents different digital signals.
It is illustrated in figure 2 the level structure figure that Rydberg atom six-wave mixing process occurs for atom in atom probe caesium bubble 2.
In energy level, 8 (6S1/2, F=4) be Cs atom ground state, 9 (6P3/2, F=4) and 13 (6P3/2, F=5) and it is respectively Cs atom
Two intermediate excitation state, 10 (25D5/2)、11(25P3/2) and 12 (25D3/2) be respectively Cs atom three Rydberg states, pass through
The Rabi frequency and mismatching angle for selecting coherent field make brewed microwave 1 in optical transition 6P3/2→6S1/2Upper generate is concerned with, from
And realize resonance six-wave mixing loop；14 be the driving light of wavelength 852nm, and 15,17 be respectively the coupling light of wavelength 510nm and auxiliary
Light is helped, their effect is to couple the ground state of atom with Rydberg states, when brewed microwave irradiation is to atom assemblage, is applied
Brewed microwave 1 is concerned in atomic medium composition optical mixing process and is converted to brewed light wave by assisted microwave synthesis field 16 and fill-in light
3；So-called relevant conversion is the six-wave mixing amplitude and phase of the light wave 3 of generation and microwave 1 received by caesium bubble 2 in the process
Amplitude and phase are associated, thus can be the modulation to light wave 3 modulation conversion of the digital signal to microwave 1；Above-mentioned S, P and
D indicates that orbital angular momentum quantum number is respectively 0,1,2 atomic energy level.
Optical heterodyne detection is carried out to brewed light wave 3 by bundling device 5, is predominantly produced laser 4 using bundling device 5
Raw wavelength is the local oscillator light ω of 852nmLOWith brewed light wave ω caused by Rydberg atom six-wave mixing processMIt is folded
Add, being superimposed resulting optical heterodyne signal frequency is (ωLO-ωM), since optical heterodyne signal carries the width of brewed light wave simultaneously
Value and phase information, thus optical heterodyne signal can be demodulated to restore digital signal.
Digital signal demodulator 7 is made of mlultiplying circuit, low-pass filter circuit and sampling decision circuit, utilizes mlultiplying circuit
Respectively by the radiofrequency signal of sinusoidal model and cosine mode and optical heterodyne signal multiplication, I/Q signal wave is restored by low-pass filter
Shape restores digital signal finally by sampling decision circuit.
Wherein, mlultiplying circuit has carried out I/Q signal and the radiofrequency signal of sinusoidal model and cosine mode in the fortune that is multiplied of time domain
It calculates.The radiofrequency signal of sinusoidal model and cosine mode refers to the frequency of the sine wave and cosine wave and the frequency one of optical heterodyne signal
It causes.Low-pass filter circuit only allows the I/Q signal of low frequency to pass through, to restore I/Q signal waveform.It samples decision circuit and realizes IQ letter
Number amplitude is corresponding with digital signal, completes the recovery of digital signal.
A kind of Wireless digital communication method based on the relevant conversion of microwave light wave, comprising the following steps:
1) it is modulated by phase-shift keying (PSK) on digital signal modulated to microwave using digital signal modulated device 18；
2) microwave is emitted by loudspeaker 19 to caesium bubble 2；
3) the Cs atom gas under warm saturated vapor is provided in caesium bubble 2, Cs atom gas is in Rydberg six-wave mixing process
It is middle that microwave 1 is modulated into brewed light wave 3；
4) brewed light wave 3 is demodulated by optical heterodyne coherent demodulation method, reverts to digital signal.
Wherein, in step 4) optical heterodyne coherent demodulation method the following steps are included:
A. local oscillator light needed for optical heterodyne detection is generated by laser 4；
B. optical heterodyne signal is generated after bundling device 5 is overlapped local oscillator light and brewed light wave；
C. photodetector 6 send the optical heterodyne signal detected to digital signal demodulator；
D. digital signal demodulator is demodulated, and restores digital signal by digital signal demodulator.
Radio digital communication receiving antenna and its method based on the relevant conversion of microwave light wave of the invention, combines microwave
Light wave is concerned with conversion process and substantially increases the channel capacity of wireless channel, and can be used for multiplexing technique, carry out multichannel,
Quick parallel communications；Simultaneously because using atom receiving end, avoids thermal noise and be easy to minimize and integrated.
The above, only the invention patent preferred embodiment, but the scope of protection of the patent of the present invention is not limited to
This, if atomic gas can also be atomic group, phase-modulation can also use amplitude modulation, any skill for being familiar with the art
Art personnel are in the range disclosed in the invention patent, and the technical solution of patent and its inventive concept are equal according to the present invention
Replacement changes, and belongs to the scope of protection of the patent of the present invention.
Claims (10)
1. a kind of radio digital communication receiving antenna based on the relevant conversion of microwave light wave, it is characterised in that: including laser, number
Word signal system tune device, caesium bubble, bundling device, photodetector and digital signal demodulator, in which:
The laser is for generating local oscillator light needed for optical heterodyne detection；
The digital signal tune device is by digital signal modulated to microwave；
The microwave modulation conversion is brewed light wave by the caesium bubble；
The local oscillator light and the brewed light wave are overlapped by the bundling device, generate optical heterodyne signal；
The photodetector receives the optical heterodyne signal；
The digital signal demodulator is for reverting to digital signal from the optical heterodyne signal.
2. the radio digital communication receiving antenna according to claim 1 based on the relevant conversion of microwave light wave, feature exist
In the interior Cs atom gas provided under room temperature saturated vapor of caesium bubble, the Cs atom gas is in Rydberg six-wave mixing mistake
The microwave is modulated into the brewed light wave in journey.
3. the radio digital communication receiving antenna according to claim 1 based on the relevant conversion of microwave light wave, feature exist
In the digital signal modulated device will be on digital signal modulated to the microwave by phase-shift keying (PSK) modulation.
4. the radio digital communication receiving antenna according to claim 3 based on the relevant conversion of microwave light wave, feature exist
In, the phase-shift keying (PSK) modulation, including BPSK modulation, QPSK modulation and 8PSK modulation, the difference so that microwave is modulated by IQ
Phase represents different digital signals.
5. the radio digital communication receiving antenna according to claim 1 based on the relevant conversion of microwave light wave, feature exist
In: the digital signal demodulator is made of mlultiplying circuit, low-pass filter circuit and sampling decision circuit, utilizes the multiplication electricity
IQ is restored by the low-pass filter respectively by the radiofrequency signal of sinusoidal model and cosine mode and optical heterodyne signal multiplication in road
Signal waveform restores digital signal finally by the sampling decision circuit.
6. the radio digital communication receiving antenna according to claim 5 based on the relevant conversion of microwave light wave, feature exist
In: the mlultiplying circuit carried out the I/Q signal with the radiofrequency signal of the sinusoidal model and cosine mode being multiplied in time domain
Operation.
7. the radio digital communication receiving antenna according to claim 5 based on the relevant conversion of microwave light wave, feature exist
In: the low-pass filter circuit only allows the I/Q signal of low frequency to pass through, to restore I/Q signal waveform；The sampling decision circuit
It realizes that I/Q signal amplitude is corresponding with digital signal, completes the recovery of digital signal.
8. a kind of Wireless digital communication method based on the relevant conversion of microwave light wave, it is characterised in that: the radio digital communication
Method the following steps are included:
1) it is modulated by phase-shift keying (PSK) on digital signal modulated to microwave using digital signal modulated device；
2) microwave passes through in horn launch to caesium bubble；
3) the Cs atom gas under warm saturated vapor is provided in caesium bubble, Cs atom gas will be micro- during Rydberg six-wave mixing
Wave is modulated into brewed light wave；
4) brewed light wave is demodulated by optical heterodyne coherent demodulation method, reverts to digital signal.
9. the Wireless digital communication method according to claim 8 based on the relevant conversion of microwave light wave, it is characterised in that: step
It is rapid 4) described in optical heterodyne coherent demodulation method the following steps are included: by the bundling device generate optical heterodyne signal, the photoelectricity
The optical heterodyne signal detected is sent to the digital signal demodulator and is demodulated by detector, by the digital signal demodulator
Restore the digital signal.
10. the Wireless digital communication method according to claim 9 based on the relevant conversion of microwave light wave, which is characterized in that
The step of bundling device generation optical heterodyne signal includes: to generate local oscillator needed for optical heterodyne detection by the laser
Light, the bundling device generate the optical heterodyne signal after being overlapped to the local oscillator light and the brewed light wave.
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| CN110401104A (en) * | 2019-07-29 | 2019-11-01 | 中国科学院大学 | A kind of Locking System and method based on Rydberg electromagnetic induced transparency signal |
| CN110518985A (en) * | 2019-07-08 | 2019-11-29 | 清远市天之衡传感科技有限公司 | Radio digital communication system and method based on Rydberg atom frequency mixer |
| CN112098736A (en) * | 2020-08-27 | 2020-12-18 | 北京无线电计量测试研究所 | Method for measuring phase of microwave electric field |
| CN113067642A (en) * | 2021-03-01 | 2021-07-02 | 山西大学 | Device and method for generating phase noise spectrum of rydberg atoms capable of measuring microwaves |
| CN114465651A (en) * | 2021-12-20 | 2022-05-10 | 军事科学院系统工程研究院网络信息研究所 | Multi-satellite cooperative electro-optical hybrid communication method based on rydberg atoms and photo-generated microwaves |
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| CN113067642B (en) * | 2021-03-01 | 2022-07-19 | 山西大学 | Rydberg atomic phase noise spectrum generation device and method capable of measuring microwaves |
| CN113067642A (en) * | 2021-03-01 | 2021-07-02 | 山西大学 | Device and method for generating phase noise spectrum of rydberg atoms capable of measuring microwaves |
| GB2606167A (en) * | 2021-04-27 | 2022-11-02 | British Telecomm | Wireless transceiver |
| GB2606167B (en) * | 2021-04-27 | 2023-06-21 | British Telecomm | Wireless transceiver |
| US12028111B1 (en) | 2021-04-27 | 2024-07-02 | British Telecommunications Public Limited Company | Wireless transceiver |
| CN114465651A (en) * | 2021-12-20 | 2022-05-10 | 军事科学院系统工程研究院网络信息研究所 | Multi-satellite cooperative electro-optical hybrid communication method based on rydberg atoms and photo-generated microwaves |
| CN114465651B (en) * | 2021-12-20 | 2024-01-02 | 军事科学院系统工程研究院网络信息研究所 | Multi-star cooperative electro-optic hybrid communication method based on Redberg atoms and photo-generated microwaves |
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Effective date of registration: 20211215 Address after: 511500 No. 01, floor t0114, industrial building, Tian'an Zhigu science and Technology Industrial Park, No. 18, Chuangxing Avenue, high tech Industrial Development Zone, Qingyuan City, Guangdong Province Applicant after: Qingyuan tianzhiheng Quantum Technology Co.,Ltd. Address before: School of physics and telecommunication engineering, South China Normal University, No. 378, Waihuan West Road, Panyu District, Guangzhou City, Guangdong Province, 510006 Applicant before: SOUTH CHINA NORMAL University |
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Application publication date: 20190618 |