CN110518985A - Radio digital communication system and method based on Rydberg atom frequency mixer - Google Patents
Radio digital communication system and method based on Rydberg atom frequency mixer Download PDFInfo
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- CN110518985A CN110518985A CN201910609527.7A CN201910609527A CN110518985A CN 110518985 A CN110518985 A CN 110518985A CN 201910609527 A CN201910609527 A CN 201910609527A CN 110518985 A CN110518985 A CN 110518985A
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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
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude modulation
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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
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
- H04B10/5561—Digital phase modulation
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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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
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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
- H04B10/70—Photonic quantum communication
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention relates to a kind of radio digital communication system and method based on Rydberg atom frequency mixer, comprising: caesium bubble, laser, microwave source, digital signal generator, digital signal modulated device, power splitter, photodetector and digital signal demodulator；Caesium bubble provides the Cs atom gas of room temperature saturated vapor pressure；Cs atom gas is prepared into Rydberg states by laser, and generates EIT effect；Digital signal generator generates digital signal；Microwave source generates the microwave of two different frequencies；Digital signal modulated device is by digital signal modulated to one of microwave；Power splitter carries out the sum operation in time domain to brewed microwave and another microwave, to realize the secondary modulation to another microwave；Caesium bubble receives the microwave of secondary modulation, and the Rydberg states EIT-AT fission process of Cs atom gas occurs, converts brewed light wave for secondary modulation microwave；Photodetector receives brewed light wave；Digital signal demodulator restores digital signal from brewed light wave.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly, to it is a kind of based on Rydberg atom frequency mixer without line number
Word communication system and method.
Background technique
Currently, radio digital communication has been widely applied in production and living practice.Radio digital communication has anti-interference
Ability is strong, mistake is controllable, is easy to the advantages that encrypting.
Inventor has found that the defect of traditional technology is under study for action: existing radio digital communication system requires complexity
Circuit connection and the processing such as filter and amplification, so that thermal noise is larger.And conventionally, as circuit structure, material
The restriction of the factors such as property, working environment, it is relatively low to the accuracy of identification of electromagnetic signal, to the range of signal identification and response
It is smaller.
Summary of the invention
In view of this, it is necessary to for above-mentioned problem, provide a kind of wireless digital based on Rydberg atom frequency mixer
Communication system and method, can simplified system structure, avoid thermal noise influence, improve signal identification sensitivity, improve bandwidth,
And it is easy to practical.
A kind of radio digital communication system based on Rydberg atom frequency mixer, comprising: caesium bubble, laser, microwave source, number
Character signal generator, digital signal modulated device, power splitter, photodetector and digital signal demodulator；
The caesium bubble, provides the Cs atom gas of room temperature saturated vapor pressure；
The laser provides detection light and coupling light, Cs atom gas is prepared into Rydberg states, and generates EIT effect
It answers；
The digital signal generator generates digital signal；
The microwave source generates the microwave of two different frequencies；The digital signal modulated device by digital signal modulated extremely
One of microwave；The power splitter carries out the sum operation in time domain to brewed microwave and another microwave, thus realization pair
The secondary modulation of another microwave；
The caesium bubble, receives the microwave of secondary modulation, the Rydberg states EIT-AT fission process of Cs atom gas occurs, will
Secondary modulation microwave is converted into brewed light wave；
The photodetector receives brewed light wave；
The digital signal demodulator restores digital signal from brewed light wave, to realize radio digital communication.
The system also includes loudspeaker, the loudspeaker will be in secondary modulation Microwave emission to caesium bubble.
The microwave M W for two different frequencies that the microwave source generates1And MW2, microwave M W for secondary modulation2Electric field
Intensity is greater than the microwave field MW for being directly used in digital signal modulated1, and the difference on the frequency of two microwave fields is less than any microwave field
Frequency.
The digital signal modulated device by digital modulation by digital signal modulated a to microwave, the digital modulation
Including PSK modulation and QAM modulation, the transmission of digital signal is carried out using the amplitude and phase of microwave.
The digital signal modulated device is made of serial/parallel translation circuit, mlultiplying circuit and adder circuit, passes through serial/parallel change
It changes circuit and the digital signal of input is become the parallel road I signal and the road Q signal, believed the road I signal and the road Q using mlultiplying circuit
The microwave to sinusoidal model and cosine mode number is modulated respectively, and adder circuit is overlapped i.e. acquisition quilt to the brewed microwave of two-way
The microwave of digital signal modulated.
The power splitter includes add circuit, realizes microwave M W1And MW2Superposition in the time domain.
The digital signal demodulator includes lock-in amplifier and sampling decision circuit, restores IQ using lock-in amplifier and believes
Then number waveform realizes that I/Q data is corresponding with digital signal by sampling decision circuit, completes the recovery of digital signal.
The lock-in amplifier is made of signal path, reference channel, phase-sensitive detector and low-pass filter, passes through signal
Channel carries out exchange amplification to the brewed lightwave signal and eliminates interference noise, reference channel output frequency reference signal,
Multiplying is carried out to input signal and reference signal using phase-sensitive detector, finally by the IQ of low-pass filter filter high-frequency
Signal, to restore IQ waveform.
A kind of Wireless digital communication method based on Rydberg atom frequency mixer, comprising:
It is steeped using caesium, the Cs atom gas of room temperature saturated vapor pressure is provided；
Using laser, detection light and coupling light are provided, Cs atom gas is prepared into Rydberg states, and generates EIT effect
It answers；
Using digital signal generator, digital signal is generated；
Using microwave source, the microwave of two different frequencies is generated；Using digital signal modulated device, extremely by digital signal modulated
One of microwave；Using power splitter, the sum operation in time domain is carried out to brewed microwave and another microwave, to realize
To the secondary modulation of another microwave；
It is steeped using caesium, receives the microwave of secondary modulation, the Rydberg states EIT-AT fission process of Cs atom gas occurs, it will
Secondary modulation microwave is converted into brewed light wave；
Using photodetector, brewed light wave is received；
The digital signal demodulator restores digital signal from brewed light wave, to realize radio digital communication
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 system of Rydberg atom frequency mixer and its method, receiving end is used
Atom receiving end, for the legacy communications system using metal receiving end, atom receiving end avoids thermal noise.
(2) the present invention is based on the radio digital communication system of Rydberg atom frequency mixer and its methods, can both pass through amplitude
Modulation can also carry out the transmission of information by phase-modulation, and received field minimum intensity and sensitivity are down to receiving volt amount
Grade can be used for feeble field communication.
(3) the present invention is based on the radio digital communication system of Rydberg atom frequency mixer and its methods, 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-sized for current device
It in the change 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 system structural schematic diagrams of Rydberg atom frequency mixer；
Fig. 2 is that the present invention is based on Cs atom energy levels in the radio digital communication system application scenarios of Rydberg atom frequency mixer
Structural schematic diagram.
Specific embodiment
As shown in Figure 1, the radio digital communication system based on Rydberg atom frequency mixer, including caesium steep 8,2 and of microwave source
3, digital signal generator 1, digital signal modulated device 4, power splitter 5, loudspeaker 6, photodetector 10 and digital signal demodulator
11.Wherein microwave source 2 and 3, for generating the microwave of different frequency；Digital signal generator 1 generates digital signal；Digital signal
Modulator 4 will be on digital signal modulated to microwave 2；Power splitter 5 carries out the phase in time domain to brewed microwave 2 and microwave 3 again
Add operation, to realize the secondary modulation to microwave 3；Loudspeaker 6 will be in the transmitting of microwave 7 to caesium bubble 8 of secondary modulation.Caesium bubble 8, is used
In providing the Cs atom gas of room temperature saturated vapor pressure, which is used in Rydberg EIT-AT fission process, will
Secondary modulation microwave 7 is converted to brewed light wave 9；Photodetector 10 is for receiving brewed light wave 9；Digital signal demodulator
11 from brewed lightwave signal 9 for restoring digital signal 1.
When being communicated, is adjusted using digital signal modulated device and power splitter by second level and modulate digital signal 1 to micro-
Wave 3, the caesium bubble 8 as receiving transducer receive the microwave 7 after secondary modulation, in Cs atom divided EIT-AT occurs
Brewed light wave 9 is converted by secondary modulation microwave 7 in journey, photodetector 10 converts detected modulated light wave signal to
Electric signal send to digital signal demodulator 11 and is demodulated, and restores digital signal by digital signal demodulator, finally completes communication.
Wherein, the microwave 2 and 3 for two different frequencies that microwave source generates, the electric field strength of the microwave 3 for secondary modulation
The microwave field 2 for being directly used in digital signal modulated should be far longer than, and the difference on the frequency of two microwave fields is far smaller than any microwave
The frequency of field (2 or 3).
Digital signal modulated device 4 by digital modulation by digital signal modulated to the microwave, above-mentioned digital modulation packet
PSK modulation and QAM modulation are included, the transmission of digital signal is carried out using the amplitude and phase of microwave.The digital signal modulated device
It is mainly made of serial/parallel translation circuit, mlultiplying circuit and adder circuit, by serial/parallel translation circuit the digital signal of input
Become the parallel road I signal and the road Q signal, the road I signal and the road Q signal modulated respectively to sinusoidal model using mlultiplying circuit and
The microwave of cosine mode, adder circuit the brewed microwave of two-way sinusoidal model and cosine mode is overlapped can be obtained by
The microwave 2 of digital signal modulated.
Power splitter 5 carries out the sum operation in time domain to microwave 2 and microwave 3, and acquisition receives digital signal secondary modulation
Microwave 7.
It is illustrated in figure 2 the level structure figure that Rydberg EIT-AT fission process occurs for atom in atom probe caesium bubble 8.In
In energy level, 12 (6S1/2, F=4) be Cs atom ground state, 13 (6P3/2, F=4) be Cs atom intermediate excitation state, 14
(34D5/2) and 15 (35P3/2) be respectively Cs atom two Rydberg states；9 be the detection light that wavelength is 852nm, and 16 be wavelength
For the coupling light of 511nm；3 are and Rydberg states 34D5/2→35P3/2Between transition resonate, frequency is the microwave of 19.626000GHz；
2 be the microwave that frequency is 19.626060GHz.Detection light 9 be incident to caesium bubble 8 in when, detection light 9 and Cs atom ground state 12 and
Jump frequency between intermediate excitation state 13 is equal, detects light 9 at this time and is absorbed by Cs atom, photodetector 10 does not have signal.When
When the frequency of incident coupling light 16 is equal with the jump frequency between intermediate excitation state 13 and Rydberg states 14, Cs atom is to spy
It surveys light 9 not reabsorb, this phenomenon is known as EIT effect.At this point, photodetector 10 can receive the transmission peaks of detection light 9,
This peak is exactly the peak EIT described in us.Microwave 3 is only added at this time, if microwave 3 can cause Cs atom in Rydberg states 14 and 15
Between transition, then EIT summit occurs splitting and forms two peaks EIT, and the spacing at the peak EIT and the intensity of microwave 3 are directly related.
If adding microwave 2, the modulation of the amplitude of microwave 3 by the amplitude and phase of microwave 2.Thus can by digital signal encoding into
In the amplitude and phase information of microwave 2, digital signal is carried out into microwave 3 by secondary modulation by microwave 2, recycles EIT-AT
Fission process converts it to light wave modulation.Above-mentioned S, P and D indicate that orbital angular momentum quantum number is respectively 0,1,2 original
Sub- energy level.
Digital signal demodulator 11 is mainly made of lock-in amplifier and sampling decision circuit, is restored using lock-in amplifier
Then I/Q signal waveform realizes that I/Q data is corresponding with digital signal by sampling decision circuit, completes the recovery of digital signal.
Wherein lock-in amplifier is mainly made of signal path, reference channel, phase-sensitive detector and low-pass filter, is passed through
Signal path carries out exchange amplification to the brewed lightwave signal and eliminates interference noise, and reference channel output frequency is with reference to letter
Number, multiplying is carried out to input signal and reference signal using phase-sensitive detector, filters out height finally by low-pass filter
The I/Q signal of frequency, to restore IQ waveform.
Communication system based on the above embodiment, the present invention also provides a kind of based on the wireless of Rydberg atom frequency mixer
Digital communication method, comprising the following steps:
1) signal modulator 4 and power splitter 5 are utilized, it will be on digital signal 1 secondary modulation to microwave 3；
2) secondary modulation microwave 7 is transmitted to the atomic gas in caesium bubble 8, is divided by Rydberg atom EIT-AT
The secondary modulation microwave 7 is converted to brewed light wave 9 by journey；
3) brewed light wave 9 is transferred to photodetector 10；
4) photodetector 10 receives brewed light wave 9, and is demodulated using digital demodulator 11 to signal, thus extensive
Complex digital signal 1.
Wherein Rydberg atom EIT-AT fission process in step 2), comprising: when detection light 9 and coupling light 16 are incident to
In the caesium bubble 8, the secondary modulation microwave field 7 is incident to the caesium bubble 8, steeps the 8 detection light 9 transmitted through caesium
The division spacing of EIT spectrum changes with the Strength Changes of the incident secondary microwave field 7, to realize that the secondary modulation is micro-
The conversion of brewed light wave described in wave direction.
In conclusion the radio digital communication system and method for the invention based on Rydberg atom frequency mixer, combines
Rydberg atom EIT-AT fission process can both carry out the transmission of information by amplitude modulation or by phase-modulation, and
Received field minimum intensity and sensitivity can be used for feeble field communication down to volt magnitude is received；Additionally due to having used atom reception
End is also easy to carry out system while very big limit avoids thermal noise miniaturization and integrated.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of radio digital communication system based on Rydberg atom frequency mixer, which is characterized in that the system comprises: caesium
Bubble, laser, microwave source, digital signal generator, digital signal modulated device, power splitter, photodetector and digital signal solution
Adjust device；
The caesium bubble, provides the Cs atom gas of room temperature saturated vapor pressure；
The laser provides detection light and coupling light, Cs atom gas is prepared into Rydberg states, and generate EIT effect；
The digital signal generator generates digital signal；
The microwave source generates the microwave of two different frequencies；The digital signal modulated device is by digital signal modulated to wherein
One microwave；The power splitter carries out the sum operation in time domain to brewed microwave and another microwave, to realize to another
The secondary modulation of one microwave；
The caesium bubble, receives the microwave of secondary modulation, the Rydberg states EIT-AT fission process of Cs atom gas occurs, by second level
Modulated microwave is converted into brewed light wave；
The photodetector receives brewed light wave；
The digital signal demodulator restores digital signal from brewed light wave, to realize radio digital communication.
2. the radio digital communication system according to claim 1 based on Rydberg atom frequency mixer, which is characterized in that institute
The system of stating further includes loudspeaker, and the loudspeaker will be in secondary modulation Microwave emission to caesium bubble.
3. the radio digital communication system according to claim 1 or 2 based on Rydberg atom frequency mixer, feature exist
In the microwave M W for two different frequencies that the microwave source generates1And MW2, microwave M W for secondary modulation2Electric field strength
Greater than the microwave field MW for being directly used in digital signal modulated1, and the difference on the frequency of two microwave fields is less than the frequency of any microwave field.
4. the radio digital communication system according to claim 3 based on Rydberg atom frequency mixer, which is characterized in that institute
Digital signal modulated device is stated by digital modulation by digital signal modulated a to microwave, the digital modulation includes PSK tune
System and QAM modulation carry out the transmission of digital signal using the amplitude and phase of microwave.
5. the radio digital communication system according to claim 4 based on Rydberg atom frequency mixer, which is characterized in that institute
It states digital signal modulated device to be made of serial/parallel translation circuit, mlultiplying circuit and adder circuit, by serial/parallel translation circuit defeated
The digital signal entered becomes the parallel road I signal and the road Q signal, is modulated the road I signal and the road Q signal respectively using mlultiplying circuit
To the microwave of sinusoidal model and cosine mode, adder circuit is overlapped the brewed microwave of two-way and obtains by digital signal tune
The microwave of system.
6. the radio digital communication system according to claim 3 based on Rydberg atom frequency mixer, which is characterized in that institute
Stating power splitter includes add circuit, realizes microwave M W1And MW2Superposition in the time domain.
7. the radio digital communication system according to claim 5 based on Rydberg atom frequency mixer, which is characterized in that institute
Stating digital signal demodulator includes lock-in amplifier and sampling decision circuit, restores I/Q signal waveform using lock-in amplifier, so
It realizes that I/Q data is corresponding with digital signal by sampling decision circuit afterwards, completes the recovery of digital signal.
8. the radio digital communication system according to claim 7 based on Rydberg atom frequency mixer, which is characterized in that institute
It states lock-in amplifier to be made of signal path, reference channel, phase-sensitive detector and low-pass filter, by signal path to described
Brewed lightwave signal carries out exchange amplification and eliminates interference noise, and reference channel output frequency reference signal is examined using phase sensitivity
Wave device carries out multiplying to input signal and reference signal, finally by the I/Q signal of low-pass filter filter high-frequency, thus
Restore IQ waveform.
9. a kind of Wireless digital communication method based on Rydberg atom frequency mixer, which is characterized in that the described method includes:
It is steeped using caesium, the Cs atom gas of room temperature saturated vapor pressure is provided；
Using laser, detection light and coupling light are provided, Cs atom gas is prepared into Rydberg states, and generate EIT effect；
Using digital signal generator, digital signal is generated；
Using microwave source, the microwave of two different frequencies is generated；Using digital signal modulated device, by digital signal modulated to wherein
One microwave；Using power splitter, the sum operation in time domain is carried out to brewed microwave and another microwave, to realize to another
The secondary modulation of one microwave；
It is steeped using caesium, receives the microwave of secondary modulation, the Rydberg states EIT-AT fission process of Cs atom gas occurs, by second level
Modulated microwave is converted into brewed light wave；
Using photodetector, brewed light wave is received；
The digital signal demodulator restores digital signal from brewed light wave, to realize radio digital communication.
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| CN113376445A (en) * | 2021-06-08 | 2021-09-10 | 合肥衡元量子技术有限公司 | Deep learning enhanced Reedberg atom multi-frequency microwave receiver and detection method |
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| CN113156415A (en) * | 2021-03-25 | 2021-07-23 | 中国人民解放军国防科技大学 | Pulse radar system based on rydberg atoms and distance measurement method |
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| US12028111B1 (en) | 2021-04-27 | 2024-07-02 | British Telecommunications Public Limited Company | Wireless transceiver |
| CN113472447A (en) * | 2021-05-14 | 2021-10-01 | 清远市天之衡量子科技有限公司 | Atom-based terahertz receiver communication system and method |
| CN113376445B (en) * | 2021-06-08 | 2021-12-14 | 合肥衡元量子技术有限公司 | Deep learning enhanced Reedberg atom multi-frequency microwave receiver and detection method |
| CN113376445A (en) * | 2021-06-08 | 2021-09-10 | 合肥衡元量子技术有限公司 | Deep learning enhanced Reedberg atom multi-frequency microwave receiver and detection method |
| CN114465651A (en) * | 2021-12-20 | 2022-05-10 | 军事科学院***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***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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