CN117527081A - Vortex microwave quantum direct modulation and demodulation system - Google Patents
Vortex microwave quantum direct modulation and demodulation system Download PDFInfo
- Publication number
- CN117527081A CN117527081A CN202311139799.8A CN202311139799A CN117527081A CN 117527081 A CN117527081 A CN 117527081A CN 202311139799 A CN202311139799 A CN 202311139799A CN 117527081 A CN117527081 A CN 117527081A
- Authority
- CN
- China
- Prior art keywords
- vortex
- microwave
- module
- transmission
- quanta
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 156
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000012937 correction Methods 0.000 claims description 23
- 238000013507 mapping Methods 0.000 claims description 16
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 230000010363 phase shift Effects 0.000 claims description 3
- 235000014676 Phragmites communis Nutrition 0.000 claims description 2
- 238000009432 framing Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008054 signal transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 15
- 238000004891 communication Methods 0.000 description 12
- 230000005684 electric field Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Transmitters (AREA)
Abstract
The invention provides a vortex microwave quantum direct modulation and demodulation system, and relates to the technical field of vortex microwave quantum transmission. According to the system, different bias voltages are selected according to baseband signals and loaded on each transmission unit, and the dielectric constants of the transmission units are adjusted, so that the amplitude and the phase of outgoing signals of the transmission units are changed, signal modulation of the amplitude and the phase of the signals is realized, and the purpose of vortex microwave quantum modulation signal transmission is achieved. The invention overcomes the vortex characteristic damage of the traditional transmitter indirect modulation device to the microwave quanta, reduces the number of radio frequency devices and optimizes the transmitter cost. Achieving the effect of high-speed transmission. The broadband high-speed modulation and demodulation effect of the vortex microwave quantum signal is realized, and a foundation is laid for the vortex microwave quantum in wireless transmission. Meanwhile, the number of radio frequency links and devices is optimized, and the method has a wide application scene in a large-capacity long-distance vortex microwave quantum multiplexing transmission scene.
Description
Technical Field
The invention relates to the technical field of vortex microwave quantum transmission, in particular to a vortex microwave quantum direct modulation and demodulation system.
Background
Since the 19 th century Markoni invention radio, wireless communication has utilized the electric field strength resources of electromagnetic waves. With the increasing demand of information society for high-capacity communication rate, electric field strength resources are gradually exhausted, which means that development of new electromagnetic wave resources is urgently needed for wireless communication. The orbital angular momentum is independent of the electric field intensity level linearity, which means that the orbital angular momentum can provide a new dimension for wireless transmission, and vortex electromagnetic waves carrying the orbital angular momentum are also selected as potential key technologies in next generation mobile communication, and have the potential of exceeding the traditional multi-antenna capacity limit and forming a capacity boundary containing the new dimension of the orbital angular momentum.
The study of orbital angular momentum originates from vortex microwave quanta. In 1992, the american scientist l.allen proposed that a single electromagnetic wave quantum in a ragel gaussian beam carries orbital angular momentum. Because of the low microwave frequency range, the single vortex microwave quantum has small energy, and the corresponding generation and detection are difficult. Until 2017, the japanese molecular technology institute proposed a vortex microwave quantum generation method based on undulators. In 2020 and 2021, the avionic laboratory of the university of Qinghua proposes a vortex microwave quantum generation and separation method based on gyrotron and gyrotron, marks the maturity of the theoretical foundation of the vortex microwave quantum, and lays a foundation for the application of the vortex microwave quantum in wireless transmission.
The switching transmission information of the vortex microwave quanta and the plane microwave quanta can be realized by using keying transmission, however, the keying transmission only uses the orbital angular momentum modal value transmission information of the vortex microwave quanta, the orthogonality characteristic among the vortex microwave quanta of different modes is not used, and the device is narrow-band transmission and has low communication rate.
In order to fully highlight the new dimensional characteristics of orbital angular momentum in wireless transmission, it is necessary to modulate the amplitude and phase of vortex microwave quanta at a transmitting end by baseband signals to construct independent parallel channels. However, the traditional transmitter indirectly modulates the amplitude and the phase of the electromagnetic plate through a circuit device, directly acts on vortex microwave quantum transmission, and can destroy the vortex characteristic of the vortex microwave quantum. Therefore, how to modulate and demodulate the amplitude and the phase of the vortex microwave quantum in the free space becomes a key problem to be broken through in the vortex microwave quantum wireless communication technology.
Disclosure of Invention
In view of the above, the present invention has been made to provide a vortex microwave quantum direct modem system that solves the above-mentioned problems, or partially solves the above-mentioned problems.
The embodiment of the invention provides a vortex microwave quantum direct modulation and demodulation system, which comprises the following components: a baseband signal generation subsystem, a radio frequency modulation subsystem and a demodulation subsystem;
The baseband signal generation subsystem is used for receiving user data, modulating the user data into serial user data, converting the serial user data into multi-path parallel data according to the number of modes of orbital angular momentum vortex microwave quanta, independently modulating each path of parallel data into complex baseband signals, mapping the complex baseband signals into bias voltages, and loading the bias voltages to a transmission module in the radio frequency modulation subsystem;
the radio frequency modulation subsystem is used for generating vortex microwave quanta with different modes in a free space, irradiating a transmission unit in the transmission module in the free space, modulating the amplitude and the phase of the single-mode vortex microwave quanta generated by the transmission unit through bias voltage, correcting the modulated single-mode vortex microwave quanta, and combining all the paths of the modulated and corrected vortex microwave quanta with different modes and radiating the combined vortex microwave quanta into the free space;
the demodulation subsystem is used for receiving vortex microwave quanta of different modes radiated in free space and demodulating the vortex microwave quanta to obtain the user data.
Optionally, the baseband signal generation subsystem includes: the device comprises a data generation module, a serial-parallel conversion module, a baseband signal mapping module, a control signal module and a feed module;
The data generation module is used for de-framing, checking and recovering the received link layer frame data into single-path user data;
the serial-parallel conversion module is used for converting the user data into multi-path parallel data according to the number of modes of the orbital angular momentum vortex microwave quanta, wherein one mode is correspondingly converted into one line of data;
the baseband signal mapping module is used for independently modulating multiple paths of parallel data into complex baseband signals;
the control signal module is used for mapping the complex baseband signals into control signals of bias voltage of each transmission unit;
the feed module is used for adjusting the bias voltage mapped to each transmission unit according to the control signals.
Optionally, the radio frequency modulation subsystem includes: the system comprises a vortex microwave quantum signal source module, a transmission module, a constellation point correction module, a waveguide combining module and a radiator module;
the vortex microwave quantum signal source module is used for generating vortex microwave quanta with different modes in the free space and irradiating each transmission unit in the free space, wherein the vortex microwave quantum signal source module adopts an orbiting oscillation tube or an orbiting traveling wave tube to generate vortex microwave quanta with different modes in the free space;
The transmission module consists of one or more transmission units, vortex microwave quanta with different modes are vertically irradiated on the transmission units through the free space, the bias voltage is loaded to the one or more transmission units, and the amplitude and the phase of the single-mode vortex microwave quanta generated by the one or more transmission units are modulated, wherein the modulation mode comprises the following steps: amplitude keying, frequency shift keying, phase shift keying, quadrature amplitude modulation, minimum shift keying or orthogonal frequency division multiplexing modulation;
the constellation point correction module is used for correcting the modulated single-mode vortex microwave quanta;
the waveguide combining module is used for combining all the corrected vortex microwave quanta with different modes to obtain multimode vortex microwave quanta, and feeding the multimode vortex microwave quanta to the radiation module through a waveguide structure;
the radiator module is used for radiating the multimode vortex microwave quanta to the free space.
Optionally, the demodulation subsystem includes: the device comprises a receiver module, a mode sorting module and a baseband data demodulation module;
the receiver module is used for receiving the multimode vortex microwave quanta;
the mode sorting module is used for sorting the single-channel multimode vortex microwave quantum signals into multi-channel different-mode single-mode vortex microwave quantum signals;
The baseband data demodulation module is used for measuring the amplitude and the phase of the current at different spatial positions and demodulating the current to obtain the user data.
Optionally, each transmission unit is a transmission unit with adjustable transmission coefficient, and the transmission units are made of liquid crystal or PIN junctions or ferrite switches.
Optionally, the feeding module includes: the non-contact feed structure is as follows: the plurality of high-potential electrode plates are positioned on one side of the insulating plate, and the plurality of low-potential electrode plates are positioned on the other side of the insulating plate;
the electrode plate, the insulating plate and the transmission unit support are all installed on the base, wherein the transmission unit support is used for installing the transmission unit in the transmission module.
Optionally, the mode sorting module includes: vortex electrons or a reed burg atomic structure.
Optionally, the constellation point correction module includes: the single-frequency vortex microwave quantum signal generation unit and the superposition combining unit;
the single-frequency vortex microwave quantum signal generation unit is used for generating an unmodulated single-frequency vortex microwave quantum signal and transmitting the unmodulated single-frequency vortex microwave quantum signal to the superposition combining unit, and the frequency of the unmodulated single-frequency vortex microwave quantum signal is the same as the frequency of the modulated single-mode vortex microwave quantum output by the transmission module;
The superposition combining unit is used for superposing the unmodulated single-frequency vortex microwave quantum signal and the modulated single-mode vortex microwave quantum so as to correct the modulated single-mode vortex microwave quantum.
Alternatively, it is characterized in that it is assumed that the transmission unitThe response at azimuth angle phi and pitch angle theta is a (phi, theta) on the y-oz plane, and the coordinate of vortex microwave quantum is assumed to be r 1 ＝(r 1 ,φ 1 ,θ 1 ) The coordinates of any position of the far field region are r= (r) 0 ,φ 0 ,θ 0 ) The signal at that location can be expressed as:
in the above, alpha 0 For path attenuation, w 0 Is an additive white gaussian noise, independent of the modulated signal,for Hadamard product operation, +.>For transmitting symbols s i When transmitting the response of the cell, where s i ∈￡，i＝0,…,I 0 -1，I 0 For the symbol modulation order, A i ∈{A 0 ,...,A k ,...,A K-1 }，/>A k And->Filling the transmissive cell with a liquid crystal dielectric constant of +.>The amplitude and phase of the transmission coefficient, the magnitude of which depends on the structure of the transmission unit and the dielectric constant of the filling medium, A for a given structure and liquid crystal model of the transmission unit k And->Obtained by equivalent circuit or full wave simulation method, +.>The number of dielectric constants to be selected depends on the practical allowable range of the applied bias voltage of the transmission unit, +.>And epsilon ⊥ The dielectric constants of the loading medium when the bias voltage is saturated and the loading medium is not under the bias voltage are respectively shown, and delta epsilon is the actual dielectric constant value interval;
Amplitude and phase of the modulated single-mode vortex microwave quantum are mapped into constellation point χ in two-dimensional plane 0 ＝{s i ∈￡ 2 ,i＝0,...,I 0 -1,y i /s i ＝β 0 }, wherein I 0 For modulating order, beta 0 Is a normalized complex constant.
Optionally, after the serial-parallel conversion module converts the user data into the multiple paths of parallel data, each path of parallel data needs to be processed by a data processing subunit, so as to obtain single-mode vortex microwave quanta corresponding to each path of parallel data, and n paths of parallel data correspond to n data processing subunits;
the data processing subunit includes: the system comprises a baseband signal mapping module, a control signal module, a feeding module, a vortex microwave quantum signal source module, a transmission module and a constellation point correction module.
The invention provides a vortex microwave quantum direct modulation and demodulation system, which comprises: a baseband signal generation subsystem, a radio frequency modulation subsystem, and a demodulation subsystem.
The baseband signal generating subsystem of the transmitting end receives user data, modulates the user data into serial user data, converts the serial user data into multi-path parallel data according to the number of modes of the orbital angular momentum vortex microwave quanta, independently modulates each path of parallel data into complex baseband signals, maps the complex baseband signals into bias voltages, and loads the bias voltages to a transmission module in the radio frequency modulating subsystem.
The radio frequency modulation subsystem of the transmitting end generates vortex microwave quanta of different modes in a free space, irradiates transmission units in the transmission module in the free space, modulates the amplitude and the phase of the single-mode vortex microwave quanta generated by each transmission unit through bias voltage, corrects the modulated single-mode vortex microwave quanta, and combines all the modulated and corrected vortex microwave quanta of different modes and irradiates the vortex microwave quanta to the free space. And a demodulation subsystem of the receiving end receives vortex microwave quanta of different modes radiated in the free space and demodulates the vortex microwave quanta to finally obtain user data.
Compared with the traditional quantum state communication system, the vortex microwave quantum direct modulation and demodulation system is not limited to modal keying transmission, and realizes multi-mode multiplexing transmission by means of a direct modulation and demodulation technology, so that the effectiveness of the vortex microwave quantum communication system is greatly improved. The problem of low transmission communication rate of vortex microwave quantum keying is well solved, and meanwhile, the dependence on a large-bandwidth vortex microwave quantum signal source is reduced to a certain extent.
The vortex microwave quantum direct modulation and demodulation system provided by the invention is direct modulation and demodulation, and does not adopt a mode that the traditional transmitter indirectly modulates the amplitude and the phase of the electromagnetic plate through a circuit device, so that the vortex characteristic damage of the traditional transmitter indirectly modulating device to the microwave quantum is overcome, the number of radio frequency devices is reduced, and the transmitter cost is optimized. The whole modulation and demodulation system directly realizes vortex microwave quantum complex signal modulation at an antenna end, and the baseband signal is mapped into the bias voltage loaded by each transmission unit, so that the modulation of the baseband signal at the narrow-band vortex microwave quantum signal is completed by utilizing the characteristic that the electric parameters of the transmission units can be regulated and controlled and matching with the degree of freedom of the transmission units, and the effect of high-speed transmission is achieved.
Under the condition that the bandwidth of the vortex microwave quantum signal source is limited, the modulation and demodulation system can adopt the adjustable transmission unit at the antenna end, so that the broadband high-speed modulation and demodulation effect of the vortex microwave quantum signal is realized, and a foundation is laid for the vortex microwave quantum in wireless transmission. Meanwhile, the number of radio frequency links and devices is optimized, and the method has a wide application scene in a large-capacity long-distance vortex microwave quantum multiplexing transmission scene.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below. It is evident that the figures in the following description are only some embodiments of the invention, from which other figures can be obtained without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a preferred modular structure of a vortex microwave quantum direct modem system in an embodiment of the invention;
FIG. 2 is a schematic diagram of a transmissive unit in an embodiment of the invention;
FIG. 3 is a schematic illustration of a preferred configuration of a non-contact feed structure in accordance with an embodiment of the present invention;
fig. 4 is a schematic diagram of a preferred structure of the constellation correction module 108 according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of signal correction in an embodiment of the invention;
fig. 6 is a diagram of normalized constellation point signals at different azimuth angles in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Currently, vortex electromagnetic waves carrying orbital angular momentum are selected as a potential core key technology in next generation mobile communications, which has the potential to exceed the traditional multi-antenna capacity limitations and form capacity boundaries containing new dimensions of orbital angular momentum.
The inventors further studied and found that: linear non-linear orbital angular momentum and electric field intensityClosing, namely: dimension of orbital angular momentum (ML 2 T -1 ) And electric field intensity level (MLT) -3 I -1 ) Linearity is irrelevant, where M, L, T and I represent the physical dimensions of mass, length, time and amperage, respectively. The orbital angular momentum mathematical expression of the electromagnetic wave is assumed to be:
Wherein c is the speed of light in vacuum, r is the position vector, E and H are the electric field strength and the magnetic field strength, ε, respectively 0 For dielectric constant in vacuum E i And A i The components of the electric field strength E and the magnetic vector potential a in the i direction (i=x, y, z),is differential operator, V is electromagnetic wave occupation region, d 3 v is a spatial infinitesimal. r is (r) (e) And r (i) The distance from the internal center point O 'of the electromagnetic wave quantum (wave packet) to the origin O of the reference coordinate system and the distance from any point in space to the internal center point O' of the wave packet are respectively, and the sum of the distances is a position vector. L and S are orbital angular momentum and spin angular momentum, respectively.
The research result of the inventor shows that: the orbital angular momentum characterizes the rotation characteristic of the wave packet of the electromagnetic wave in space, and is further divided into intrinsic orbital angular momentum and external orbital angular momentum according to whether the value is related to the selection of a reference coordinate system or not, and L is respectively used for (i) And L (e) The former reflects the wave packet characteristics of vortex microwave quanta, and the latter is related to the statistical characteristics of vortex beams.
The characteristic that the orbital angular momentum of the electromagnetic wave and the electric field intensity are mutually independent shows that the orbital angular momentum, particularly the intrinsic orbital angular momentum carried by vortex microwave quanta, can provide new dimensions for wireless transmission, and the vortex electromagnetic wave carrying the orbital angular momentum is also selected as a potential key technology in next generation mobile communication, and has the potential of exceeding the capacity limit of the traditional multiple antennas and forming capacity boundaries containing the new dimensions of the orbital angular momentum.
However, after further study, the inventors found that: at present, the traditional transmitter indirectly modulates the amplitude and the phase of an electromagnetic plate through a circuit device, directly acts on vortex microwave quantum transmission, and can destroy the vortex characteristic of vortex microwave quantum. Therefore, how to modulate and demodulate the amplitude and the phase of the vortex microwave quantum in the free space becomes a key problem to be broken through in the vortex microwave quantum wireless communication technology.
In order to solve the problems found by the research of the inventor, the inventor creatively proposes a vortex microwave quantum direct modulation and demodulation system, and the vortex microwave quantum direct modulation and demodulation system is explained and described in detail below.
The embodiment of the invention provides a vortex microwave quantum direct modulation and demodulation system, which comprises the following components: a baseband signal generation subsystem, a radio frequency modulation subsystem, and a demodulation subsystem.
The baseband signal generating subsystem of the transmitting end is used for receiving user data, modulating the user data into serial user data, converting the serial user data into multi-path parallel data according to the number of modes of the orbital angular momentum vortex microwave quanta, independently modulating each path of parallel data into complex baseband signals, mapping the complex baseband signals into bias voltages, and loading the bias voltages to the transmission module in the radio frequency modulating subsystem.
The radio frequency modulation subsystem of the transmitting end is used for generating vortex microwave quanta of different modes in a free space, irradiating transmission units in the transmission module in the free space, modulating the amplitude and the phase of the single-mode vortex microwave quanta generated by each transmission unit through bias voltage, correcting the modulated single-mode vortex microwave quanta, and combining all the vortex microwave quanta of different modes after modulation and correction and radiating the vortex microwave quanta to the free space.
The demodulation subsystem of the receiving end is used for receiving vortex microwave quanta of different modes radiated in the free space and demodulating the vortex microwave quanta, so that user data are obtained.
In order to better explain and explain the vortex microwave quantum direct modulation and demodulation system provided by the invention, referring to fig. 1, a better modularized structure schematic diagram of the vortex microwave quantum direct modulation and demodulation system in the embodiment of the invention is shown, 2 paths of parallel data are taken as an example in fig. 1, and more than 2 paths of parallel data can be obtained by simple reasoning with reference to the modularized structure shown in fig. 1.
In fig. 1, the baseband signal generation subsystem includes: a data generation module 101, a serial-parallel conversion module 102, a baseband signal mapping module 103, a control signal module 104, and a feeding module 105; the radio frequency modulation subsystem comprises: a vortex microwave quantum signal source module 106, a transmission module 107, a constellation point correction module 108, a waveguide combining module 109 and a radiator module 110; the demodulation subsystem includes: a receiver module 201, a mode sorting module 202 and a baseband data demodulation module 203.
The structure of the transmitting end is as follows:
the data generating module 101 is configured to de-frame, check and recover the received link layer frame data into single-path user data; the serial-parallel conversion module 102 is configured to convert single-path user data into multiple paths of parallel data according to the number of modes of the orbital angular momentum vortex microwave quanta, where one mode is correspondingly converted into one line of data. For example: the number of modes of the orbital angular momentum vortex microwave quanta is 2, the single-path user data can be converted into 2-path parallel data, if the number of modes of the orbital angular momentum vortex microwave quanta is 3, the single-path user data can be converted into 3-path parallel data, and the like.
The baseband signal mapping module 103 is configured to independently modulate multiple paths of parallel data into complex baseband signals; the control signal module 104 is configured to map the complex baseband signal into a control signal of the bias voltage of each transmissive cell.
The feeding module 105 is used for adjusting the bias voltage mapped to each transmissive cell according to the control signal.
The vortex microwave quantum signal source module 106 is used for generating vortex microwave quanta with different modes in a free space and irradiating each transmission unit in the free space; in order to improve the direct modulation efficiency, the signal of the unmodulated single-frequency vortex electromagnetic plate and the modulated signal can be interfered, the constellation diagram of the transmitted signal is corrected, and the distance between constellation points is increased. In one possible embodiment, the vortex microwave quantum signal source module 106 may employ an gyrator or an gyrator traveling wave tube to generate vortex microwave quanta of different modes in free space.
The transmission module 107 is composed of one or more transmission units, vortex microwave quanta with different modes are vertically irradiated on the surfaces of the one or more transmission units through free space, bias voltage is applied to the one or more transmission units, and the amplitude and the phase of the single-mode vortex microwave quanta generated by the one or more transmission units are modulated, wherein the modulation mode can comprise: amplitude keying, frequency shift keying, phase shift keying, quadrature amplitude modulation, minimum shift keying or orthogonal frequency division multiplexing modulation.
There are two inputs corresponding to the transmission module 107, one is vortex microwave quanta radiated by the vortex electromagnetic plate signal source module 106 and vertically irradiated on one or more transmission unit surfaces through free space; the second is that the feed module 105 loads a bias voltage to one or more transmissive cells.
The constellation point correction module 108 is used for correcting the modulated single-mode vortex microwave quanta so that the constellation diagram meets the central symmetry structure and the constellation point distortion is reduced; the waveguide combining module 109 is configured to combine all the corrected vortex microwave quanta with different modes to obtain multimode vortex microwave quanta, and feed the multimode vortex microwave quanta to the radiation module 110 through a waveguide structure; the radiator module 110 is used to radiate multimode vortex microwave quanta into free space.
The structure of the receiving end is as follows:
the receiver module 201 is configured to receive the multi-mode vortex microwave quanta radiated to free space by the radiator module 110; the mode sorting module 202 is used for sorting the single-channel multimode vortex microwave quanta into multi-channel single-mode vortex microwave quanta signals. The baseband data demodulation module 203 is configured to measure the amplitude and phase of vortex microwave quantum signals in different modes, and demodulate the baseband signals to obtain user data.
From the above description, it can be seen that: compared with the traditional quantum state communication system, the vortex microwave quantum direct modulation and demodulation system is not limited to modal keying transmission, and realizes multi-mode multiplexing transmission by means of a direct modulation and demodulation technology, so that the effectiveness of the vortex microwave quantum communication system is greatly improved. The problem of low transmission communication rate of vortex microwave quantum keying is well solved, and meanwhile, the dependence on a large-bandwidth vortex microwave quantum signal source is reduced to a certain extent.
Because of direct modulation and demodulation, the mode that the traditional transmitter indirectly modulates the amplitude and the phase of the electromagnetic plate through a circuit device is not adopted, so that the vortex characteristic damage of the traditional transmitter indirectly modulating device to microwave quanta is overcome, the number of radio frequency devices is reduced, and the cost of the transmitter is optimized. The whole modulation and demodulation system directly realizes vortex microwave quantum complex signal modulation at an antenna end, and the baseband signal is mapped into the bias voltage loaded by each transmission unit, so that the modulation of the baseband signal at the narrow-band vortex microwave quantum signal is completed by utilizing the characteristic that the electric parameters of the transmission units can be regulated and controlled and matching with the degree of freedom of the transmission units, and the effect of high-speed transmission is achieved.
Under the condition that the bandwidth of the vortex microwave quantum signal source is limited, the modulation and demodulation system can adopt the adjustable transmission unit at the antenna end, so that the broadband high-speed modulation and demodulation effect of the vortex microwave quantum signal is realized, and a foundation is laid for the vortex microwave quantum in wireless transmission. Meanwhile, the number of radio frequency links and devices is optimized, and the method has a wide application scene in a large-capacity long-distance vortex microwave quantum multiplexing transmission scene.
From the above explanation and description, it can be seen that in connection with fig. 1: after the serial-parallel conversion module 102 converts single-path user data into multi-path parallel data, each path of parallel data needs to be processed by a data processing subunit, so as to obtain single-mode vortex microwave quanta corresponding to each path of parallel data, and n paths of parallel data correspond to n data processing subunits;
the data processing subunit specifically includes: a baseband signal mapping module 103, a control signal module 104, a feeding module 105, a vortex microwave quantum signal source module 106, a transmission module 107 and a constellation point correction module 108. Namely: each path of parallel data needs to be processed by the above-mentioned 6 modules 103-106, for example, 2 paths of parallel data shown in fig. 1, 1 path of parallel data needs to sequentially pass through the 6 modules 103-106, and the other 1 path of parallel data needs to sequentially pass through the other 6 modules which are the same. And the data generation module 101, the serial-parallel conversion module 102, the waveguide combining module 109 and the radiation module 110 need only 1 module in the whole vortex microwave quantum direct modulation and demodulation system.
For the transmissive module 107, in one possible embodiment, one or more transmissive element shapes are assumed to lie on the yo-z plane, and in combination with the schematic diagram of the transmissive element structure shown in FIG. 2, the transmissive element is assumed to lie on the y-o-z plane with a response of a (φ, θ) at azimuth angle φ and pitch angle θ. Let the coordinate of vortex microwave quantum be r 1 ＝(r 1 ,φ 1 ,θ 1 ) The coordinates of any position of the far field region are r= (r) 0 ,φ 0 ,θ 0 ) The signal at that location can be expressed as:
in the above, alpha 0 For path attenuation, w 0 Is an additive white gaussian noise, independent of the modulated signal,for Hadamard product operation, +.>For transmitting symbols s i When transmitting the response of the cell, where s i ∈￡，i＝0,…,I 0 -1，I 0 For the symbol modulation order, A i ∈{A 0 ,...,A k ,...,A K-1 }，/>A k And->Filling the transmissive cell with a liquid crystal dielectric constant of +.>The amplitude and phase of the transmission coefficient. The size of which depends on the structure of the transmissive unit and the dielectric constant of the filling medium. In practical applications, the reconfigurability of the transmission unit in amplitude frequency and phase frequency response can be changed by adjusting the magnitude of the bias voltage and the dielectric constant of the filling medium. For a given transmissive cell structure and liquid crystal model, A k And->Obtained by equivalent circuit or full wave simulation method, +.>The number of dielectric constants to be selected depends on the practical allowable range of the applied bias voltage of the transmission unit, +. >And epsilon ⊥ The dielectric constants of the loaded medium when the bias voltage is saturated and the loaded medium is not under the bias voltage are respectively shown, and delta epsilon is the actual dielectric constant value interval.
In fig. 2, the baseband signal refers to a complex baseband signal modulated by the baseband signal mapping module 103; the single-frequency signal refers to vortex microwave quanta of different modes generated by the vortex electromagnetic plate signal source module 106; the modulation signal refers to the modulated vortex microwave quanta.
Because the vortex electromagnetic plate signal source module 106 has a resonant cavity structure, the vortex microwave quanta irradiated on the transmission unit are single-frequency signals with constant amplitude, and do not carry information. In order to realize the modulation of the amplitude and phase of the single frequency signal, the transmitter needs to change the transmission coefficient of the transmission unit in real time according to the symbol to be transmittedThe amplitude and the phase of the emergent signal of the transmission module 107 are controlled, and the modulation of vortex microwave quanta is realized.
In order to evaluate the signal modulation quality, the amplitude and the phase of the modulated single-mode vortex microwave quantum are mapped into constellation points χ in a two-dimensional plane 0 ＝{s i ∈￡ 2 ,i＝0,...,I 0 -1,y i /s i ＝β 0 }, wherein I 0 For modulating order, beta 0 Is a normalized complex constant.
Furthermore, the modulation signal based on the transmission unit is related to the relative orientation between the receiver and the transmitter. Therefore, the baseband signal mapping module 103 needs to dynamically select the constellation point set χ in real time according to the receiver position 0 。
For the feed module 105, conventional contact electrode patches block the path of incident electromagnetic waves through the liquid crystal. Because the electric field intensity of the feed is concentrated between two electrode patches, in the non-patch coverage area where the incident electromagnetic wave can penetrate, enough electric field intensity cannot be provided for regulating and controlling the transmission unit.
Based on the above problems, the inventors have made extensive researches and experiments to creatively propose a non-contact feed structure of an embodiment of the present invention. The noncontact feeding structure includes: the electrode plate, the base, the insulating plate and the transmission unit bracket are formed, a plurality of pairs of electrode plates are used for surrounding the liquid crystal transmission unit, the transmission unit is separated from the feed system, and the purpose of regulating and controlling the transmission unit is achieved on the premise of not blocking incident electromagnetic waves.
The feed module 105 formed by the transmission units does not shield electromagnetic waves from penetrating the transmission units, so that the purpose of regulating and controlling the transmission units required by the invention is fulfilled.
It is also considered that if the transmission unit can be set to adjust a plurality of bias voltages, the design of the feed network is also tested. In order to simplify the circuit design, the bias voltage of the liquid crystal can be set to be in a non-bias state and a saturation state, so that the transmission unit applies the bias voltage in a binary keying feed mode. Of course, the feeding mode can also be multi-key feeding or even analog signal continuous feeding.
The modulation range of the vortex microwave quantum depends on the regulation range of the transmission unit and the transformation range of the externally applied bias voltage. For a miniaturized and low-cost transmitting system, the hardware cost is limited, and the range of externally applied bias voltage is limited, so that the modulation range of vortex microwave quanta can be limited to the same quadrant, the correlation of modulation signals is increased, and the signal recovery is not facilitated. To solve this problem, in the embodiment of the present invention, a constellation correction module 108 is added between the transmission module 107 and the waveguide combining module 109.
Referring to a preferred configuration of the constellation correction module 108 shown in fig. 4, the constellation point correction module 108 includes: the single-frequency vortex microwave quantum signal generation unit and the superposition combining unit.
The single-frequency vortex microwave quantum signal generating unit is used for generating an unmodulated single-frequency vortex microwave quantum signal (namely, a correction signal which is a single-frequency signal) and transmitting the unmodulated single-frequency vortex microwave quantum signal to the superposition combining unit, wherein the frequency of the unmodulated single-frequency vortex microwave quantum signal is the same as the frequency of the modulated single-mode vortex microwave quantum (namely, a modulation transmitting signal, and constellation points of the modulation transmitting signal are unbalanced) output by the transmission module.
The superposition combining unit is used for superposing the unmodulated single-frequency vortex microwave quantum signal and the modulated single-mode vortex microwave quantum so as to correct the modulated single-mode vortex microwave quantum (namely, corrected modulation signal and constellation point balance thereof), and realize the correction of the modulation signal.
A more intuitive understanding can be obtained by combining the signal correction schematic diagram shown in fig. 5, wherein the left diagram in fig. 5 shows the modulated signal constellation diagram before correction, and it can be seen that the modulated signal constellation diagram is limited to the same quadrant, and the constellation points are unbalanced. The middle diagram in fig. 5 shows the constellation diagram when the correction signal occurs, and the solid triangle is the correction signal. The right hand graph in fig. 5 shows the corrected modulated signal constellation, which can be seen to be no longer limited to the same quadrant and the constellation points are balanced.
It should be noted that, the above modules are only exemplified for better explaining and explaining the vortex microwave quantum direct modem system provided by the invention, and do not indicate that the vortex microwave quantum direct modem system can only be formed by the above modules, and all structures, components or integrated circuits capable of realizing the functions of the above modules can replace the corresponding modules to realize the functions of the vortex microwave quantum direct modem system provided by the invention.
In order to verify the correctness and effectiveness of the vortex microwave quantum direct modulation and demodulation system provided by the invention, a transmission unit filling medium adopts filling liquid crystal as liquid crystal of GT3-23001 microwave frequency band of Merck company in Germany, and relative dielectric constant epsilon is the same when no bias voltage exists ⊥ =2.57, loss tangent tan δ ⊥ ＝51.1×10 -3 The method comprises the steps of carrying out a first treatment on the surface of the Relative permittivity when the bias voltage is saturatedLoss tangent tan delta ⊥ ＝34.9×10 -3 As an example.
The transmission unit adopts a non-contact type feeding structure, and referring to fig. 3, two pairs of electrode plates are exemplified in fig. 3, and in practical application, the transmission unit may be a plurality of high-potential electrode plates and a plurality of low-potential electrode plates. Fig. 3 includes: the size and structure of the four parts of the 4 electrode plates, the base, the insulating plate and the transmission unit bracket are shown in figure 3. Wherein the incident electromagnetic wave is along the y-axis. Among the four electrode plates, two grounded electrode plates are low-potential electrode plates, and two high-potential electrode plates are high-potential electrode plates.
In order to ensure that the electric field intensity at the center (x=0) of the liquid crystal transmission cell is the same as the propagation direction of the incident electromagnetic wave, the voltages of the high-potential electrode plates are the same, and the two electrode plates located in the x <0 region and the two electrode plates located in the x >0 region are symmetrical with each other in the y-axis.
Since the charges are concentrated between the high potential and zero potential electrode plates (i.e., low potential electrode plates), an insulating plate made of epoxy resin is added between the high potential and zero potential electrode plates (y=0), so that the breakdown of air caused by the excessively high voltage between the positive electrode plate and the negative electrode plate is prevented. The base is used for supporting the electrode plates, the insulating plates and the transmission units and is also made of insulating materials. The transmission unit support is used for placing the transmission module. The optimized parameters are as follows: width d of base 1 Transmission antenna width d =120 mm 2 Width of insulating plate l =30.64 mm 4 Width of electrode plate l =35 mm 5 Height h of electrode plate =40 mm 3 Height h of support plate under electrode plate =120 mm 4 Thickness h of base =50mm 5 The electrode plate and support plate angle α=88° with reference to fig. 3, the parameter meaning being known in conjunction with 20 mm.
After HFSS simulation, the frequency of incident vortex microwave quanta is 28GHz, and when the transmission unit has no bias voltage, the transmission amplitude and the phase are respectively A Nonbias ＝0.69，When the bias voltage of the transmission unit is saturated, the transmission amplitude and the phase are respectively A Sat ＝0.54，/>It is proved that the transmission module 107 formed by the transmission units has larger working bandwidth, and larger adjustment range of the amplitude and phase of the output vortex microwave quantum, and meets the amplitude and phase of the required modulation single-mode vortex microwave quantum.
Through the above example, the vortex microwave quantum direct modulation and demodulation system provided by the invention is direct modulation and demodulation, and does not adopt a mode that the traditional transmitter indirectly modulates the amplitude and the phase of the electromagnetic plate through a circuit device, so that the vortex characteristic damage of the traditional transmitter indirectly modulating device to the microwave quantum is overcome, the number of radio frequency devices is reduced, and the transmitter cost is optimized. The whole modulation and demodulation system directly realizes vortex microwave quantum complex signal modulation at an antenna end, and the baseband signal is mapped into the bias voltage loaded by each transmission unit, so that the modulation of the baseband signal on the narrow-band vortex microwave quantum signal is completed by utilizing the characteristic that the electric parameters of the transmission units can be regulated and controlled, and the effect of high-speed transmission is achieved.
Under the condition that the bandwidth of the vortex microwave quantum signal source is limited, the modulation and demodulation system can adopt the adjustable transmission unit at the antenna end, so that the broadband high-speed modulation and demodulation effect of the vortex microwave quantum signal is realized, and a foundation is laid for the vortex microwave quantum in wireless transmission. Meanwhile, the number of radio frequency links and devices is optimized, and the method has a wide application scene in a large-capacity long-distance vortex microwave quantum multiplexing transmission scene.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (10)
1. A vortex microwave quantum direct modem system, characterized in that the vortex microwave quantum direct modem system comprises: a baseband signal generation subsystem, a radio frequency modulation subsystem and a demodulation subsystem;
the baseband signal generation subsystem is used for receiving user data, modulating the user data into serial user data, converting the serial user data into multi-path parallel data according to the number of modes of orbital angular momentum vortex microwave quanta, independently modulating each path of parallel data into complex baseband signals, mapping the complex baseband signals into bias voltages, and loading the bias voltages to a transmission module in the radio frequency modulation subsystem;
the radio frequency modulation subsystem is used for generating vortex microwave quanta with different modes in a free space, irradiating a transmission unit in the transmission module in the free space, modulating the amplitude and the phase of the single-mode vortex microwave quanta generated by the transmission unit through bias voltage, correcting the modulated single-mode vortex microwave quanta, and combining all the paths of the modulated and corrected vortex microwave quanta with different modes and radiating the combined vortex microwave quanta into the free space;
The demodulation subsystem is used for receiving vortex microwave quanta of different modes radiated in free space and demodulating the vortex microwave quanta to obtain the user data.
2. The vortex microwave quantum direct modem system of claim 1, wherein the baseband signal generation subsystem comprises: the device comprises a data generation module, a serial-parallel conversion module, a baseband signal mapping module, a control signal module and a feed module;
the data generation module is used for de-framing, checking and recovering the received link layer frame data into single-path user data;
the serial-parallel conversion module is used for converting the user data into multi-path parallel data according to the number of modes of the orbital angular momentum vortex microwave quanta, wherein one mode is correspondingly converted into one line of data;
the baseband signal mapping module is used for independently modulating multiple paths of parallel data into complex baseband signals;
the control signal module is used for mapping the complex baseband signals into control signals of bias voltage of each transmission unit;
the feed module is used for adjusting the bias voltage mapped to each transmission unit according to the control signals.
3. The vortex microwave quantum direct modem system of claim 2, wherein the radio frequency modulation subsystem comprises: the system comprises a vortex microwave quantum signal source module, a transmission module, a constellation point correction module, a waveguide combining module and a radiator module;
the vortex microwave quantum signal source module is used for generating vortex microwave quanta with different modes in the free space and irradiating each transmission unit in the free space, wherein the vortex microwave quantum signal source module adopts an orbiting oscillation tube or an orbiting traveling wave tube to generate vortex microwave quanta with different modes in the free space;
the transmission module consists of one or more transmission units, vortex microwave quanta with different modes are vertically irradiated on the transmission units through the free space, the bias voltage is loaded to the one or more transmission units, and the amplitude and the phase of the single-mode vortex microwave quanta generated by the one or more transmission units are modulated, wherein the modulation mode comprises the following steps: amplitude keying, frequency shift keying, phase shift keying, quadrature amplitude modulation, minimum shift keying or orthogonal frequency division multiplexing modulation;
the constellation point correction module is used for correcting the modulated single-mode vortex microwave quanta;
The waveguide combining module is used for combining all the corrected vortex microwave quanta with different modes to obtain multimode vortex microwave quanta, and feeding the multimode vortex microwave quanta to the radiation module through a waveguide structure;
the radiator module is used for radiating the multimode vortex microwave quanta to the free space.
4. The vortex microwave quantum direct modem system of claim 3, wherein the demodulation subsystem comprises: the device comprises a receiver module, a mode sorting module and a baseband data demodulation module;
the receiver module is used for receiving the multimode vortex microwave quanta;
the mode sorting module is used for sorting the single-channel multimode vortex microwave quantum signals into multi-channel different-mode single-mode vortex microwave quantum signals;
the baseband data demodulation module is used for measuring the amplitude and the phase of the current at different spatial positions and demodulating the current to obtain the user data.
5. The vortex microwave quantum direct modem system of claim 3 wherein each of the transmission units is a transmission unit with a controllable transmission coefficient, and the transmission units are made of liquid crystal or PIN junction or ferrite switch.
6. The vortex microwave quantum direct modem system of claim 3, wherein the feed module comprises: a non-contact feed structure;
the non-contact feed structure is as follows: the plurality of high-potential electrode plates are positioned on one side of the insulating plate, and the plurality of low-potential electrode plates are positioned on the other side of the insulating plate;
the electrode plate, the insulating plate and the transmission unit support are all installed on the base, wherein the transmission unit support is used for installing the transmission unit in the transmission module.
7. The vortex microwave quantum direct modem system of claim 3, wherein the mode sorting module comprises: vortex electrons or a reed burg atomic structure.
8. The vortex microwave quantum direct modem system of claim 3, wherein the constellation point correction module comprises: the single-frequency vortex microwave quantum signal generation unit and the superposition combining unit;
the single-frequency vortex microwave quantum signal generation unit is used for generating an unmodulated single-frequency vortex microwave quantum signal and transmitting the unmodulated single-frequency vortex microwave quantum signal to the superposition combining unit, and the frequency of the unmodulated single-frequency vortex microwave quantum signal is the same as the frequency of the modulated single-mode vortex microwave quantum output by the transmission module;
The superposition combining unit is used for superposing the unmodulated single-frequency vortex microwave quantum signal and the modulated single-mode vortex microwave quantum so as to correct the modulated single-mode vortex microwave quantum.
9. The vortex microwave quantum direct modem system of claim 7, wherein assuming that the transmission unit is located on the y-o-z plane, the response at the azimuth angle Φ and the pitch angle θ is a (Φ, θ), and assuming that the coordinate of the vortex microwave quantum is r 1 ＝(r 1 ,φ 1 ,θ 1 ) The coordinates of any position of the far field region are r= (r) 0 ,φ 0 ,θ 0 ) The signal at that location can be expressed as:
in the above, alpha 0 For path attenuation, w 0 Is an additive white gaussian noise, independent of the modulated signal,for the Hadamard product operation,for transmitting symbols s i The response of the transmission cell, wherein +.>I 0 For the symbol modulation order, A i ∈{A 0 ,...,A k ,...,A K-1 }，/>A k And->Filling the transmissive cell with a liquid crystal dielectric constant of +.>The amplitude and phase of the transmission coefficient, the magnitude of which depends on the structure of the transmission unit and the dielectric constant of the filling medium, A for a given structure and liquid crystal model of the transmission unit k And->Obtained by equivalent circuit or full wave simulation method, +.>The number of dielectric constants to be selected depends on the practical allowable range of the applied bias voltage of the transmission unit, +. >And epsilon ⊥ The dielectric constants of the loading medium when the bias voltage is saturated and the loading medium is not under the bias voltage are respectively shown, and delta epsilon is the actual dielectric constant value interval;
amplitude and phase of the modulated single-mode vortex microwave quantum are mapped into constellation point χ in two-dimensional plane 0 ＝{s i ∈￡ 2 ,i＝0,...,I 0 -1,y i /s i ＝β 0 }, wherein I 0 For modulating order, beta 0 Is a normalized complex constant.
10. The vortex microwave quantum direct modulation and demodulation system according to claim 3, wherein after the serial-parallel conversion module converts the user data into the multi-path parallel data, each path of parallel data needs to be processed by a data processing subunit, so as to obtain single-mode vortex microwave quanta corresponding to each path of parallel data, and n paths of parallel data correspond to n data processing subunits;
the data processing subunit includes: the system comprises a baseband signal mapping module, a control signal module, a feeding module, a vortex microwave quantum signal source module, a transmission module and a constellation point correction module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311139799.8A CN117527081A (en) | 2023-09-05 | 2023-09-05 | Vortex microwave quantum direct modulation and demodulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311139799.8A CN117527081A (en) | 2023-09-05 | 2023-09-05 | Vortex microwave quantum direct modulation and demodulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117527081A true CN117527081A (en) | 2024-02-06 |
Family
ID=89759463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311139799.8A Pending CN117527081A (en) | 2023-09-05 | 2023-09-05 | Vortex microwave quantum direct modulation and demodulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117527081A (en) |
-
2023
- 2023-09-05 CN CN202311139799.8A patent/CN117527081A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9485076B2 (en) | Dynamic polarization modulation and control | |
| Tatu et al. | Ka-band analog front-end for software-defined direct conversion receiver | |
| CN102035583B (en) | Wireless transmission system, wireless communication device, and wireless communication method | |
| US10122404B2 (en) | Wireless transceiver for transmitting circularly-polarized signals with modulated angular speed | |
| Hodge et al. | Reconfigurable metasurfaces for index modulation in 5G wireless communications | |
| US10950937B2 (en) | Device and method for controlling beam by using lens in wireless communication system | |
| Sheldon et al. | Four-channel spatial multiplexing over a millimeter-wave line-of-sight link | |
| US8391376B2 (en) | System and method for electronically steering an antenna | |
| US8411794B2 (en) | System and method for arbitrary phase and amplitude modulation in an antenna | |
| US20070279284A1 (en) | Method To Design Polarization Arrangements For Mimo Antennas Using State Of Polarization As Parameter | |
| WO2009012361A1 (en) | Radio beam forming antenna with electroactive polymer actuator | |
| Henthorn et al. | Direct antenna modulation for high-order phase shift keying | |
| CN105049399A (en) | Directional modulation signal design method based on spatial Fourier transformation | |
| He et al. | A W-band 2× 2 rectenna array with on-chip CMOS switching rectifier and on-PCB tapered slot antenna for wireless power transfer | |
| US8457251B2 (en) | System and method for spreading and de-spreading a signal at an antenna | |
| CN102355447A (en) | Three-dimensional modulation method for polarization and phase combination of signals in communication system | |
| US8213534B2 (en) | Transmission apparatus and communication system | |
| Khan et al. | A 0.31 THz CMOS uniform circular antenna array enabling generation/detection of waves with orbital-angular momentum | |
| Basar et al. | Reconfigurable intelligent surfaces for 6G: Emerging hardware architectures, applications, and open challenges | |
| CN117527081A (en) | Vortex microwave quantum direct modulation and demodulation system | |
| Yuri et al. | Mode selection method suitable for dual-circular-polarized OAM transmission | |
| Humphrey et al. | A mutual coupling model for microstrip patch antenna pairs with arbitrary orientation | |
| Nishio et al. | A frequency-controlled beam-steering array with mixing frequency compensation for multichannel applications | |
| Zheng et al. | Direct-modulation Wireless Communication with Real-time Programmable Metasurface | |
| US11569579B2 (en) | Wireless data transmission using polarised electromagnetic radiation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |