CN104683021B - Orbital angular momentum OAM electromagnetic transmission device and methods - Google Patents
Orbital angular momentum OAM electromagnetic transmission device and methods Download PDFInfo
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- CN104683021B CN104683021B CN201510119945.XA CN201510119945A CN104683021B CN 104683021 B CN104683021 B CN 104683021B CN 201510119945 A CN201510119945 A CN 201510119945A CN 104683021 B CN104683021 B CN 104683021B
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Abstract
The embodiments of the invention provide a kind of OAM electromagnetic transmissions device and method, improving OAM electromagnetic waves in the prior art can not long-distance transmissions, the problem of causing adverse effect to the popularization and application of OAM electromagnetic waves.The device includes emitter, and emitter includes the first reflector and multiple transmission antenna units；Multiple transmission antenna units are evenly arranged on the first circumference on the first reflector, the radiation direction of each transmission antenna unit is towards the first reflector, the center of circle of first circumference is located on the main shaft of the first reflector, emitter also includes and the one-to-one multiple transmitting excitation ports being connected of multiple transmission antenna units, the OAM multiplexers being connected with multiple transmitting excitation ports, and the first OAM gainequalizers being connected with OAM multiplexers.Using the device and method, the transmission range of OAM electromagnetic waves can be significantly improved, it is easy to implement, it is easy to popularization and application.
Description
Technical field
The present invention relates to wireless communication technology field, filled in particular to a kind of orbital angular momentum OAM electromagnetic transmissions
Put and method.
Background technology
In March, 2011, space physics research institute of Sweden Thide professors group uses on the Italian Venetian lagoon water surface
Experiment is proved：Utilize OAM（Orbital Angular Momentum）Electromagnetic wave, can double lifting nothing i.e. by distorting electromagnetic wave
The capacity of line communication, the characteristics of can be with double lifting channel capacity based on OAM electromagnetic waves, OAM electromagnetic waves have larger be applicable
Scope.But, designer it has been investigated that, the electric rotating magnetic wave that existing OAM electromagnetic waves are used is a zero point at center, electricity
The intensity of magnetic wave is very small, close to zero, thus OAM electromagnetic waves can not long-distance transmissions, the popularization and application to OAM electromagnetic waves make
Into adverse effect.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of OAM electromagnetic transmissions device and method, to improve
OAM electromagnetic waves can not long-distance transmissions, the problem of causing adverse effect to the popularization and application of OAM electromagnetic waves in the prior art.
To achieve these goals, the technical scheme that the embodiment of the present invention is used is as follows：
In a first aspect, the embodiments of the invention provide a kind of OAM electromagnetic transmissions device, including emitter, the hair
Injection device includes the first reflector and multiple transmission antenna units；
The multiple transmission antenna unit is evenly arranged on the first circumference on first reflector, each
The radiation direction of the transmission antenna unit is towards first reflector, and the center of circle of first circumference is located at described first
On the main shaft of reflector；
The emitter also include with the one-to-one multiple transmitting excitation ports being connected of the multiple transmission antenna unit,
The OAM multiplexers being connected with the multiple transmitting excitation port, and the first OAM gains being connected with the OAM multiplexers
Balanced device；
The OAM multiplexers and the first OAM gainequalizers are used for the parallel signal S for tieing up M waiting for transmissionTnThrough increasing
The antenna excitation signal S ' of N-dimensional is converted to after beneficial balanced and multiplexingTj。
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein, also
Including reception device, the reception device includes the second reflector and multiple reception antenna units；
The multiple reception antenna unit is evenly arranged on the second circumference on second reflector, Mei Gesuo
The radiation direction of reception antenna unit is stated towards second reflector, the center of circle of second circumference is anti-positioned at described second
On the main shaft of emitter, the mouth face just to a transmission antenna unit, institute are distinguished in the mouth face of each reception antenna unit
The major axes orientation of the major axes orientation and first reflector of stating the second reflector be located along the same line or with it is described first anti-
Angle of the major axes orientation formation less than 60 degree of emitter；
The reception device also include with the one-to-one multiple receiving ports being connected of the multiple reception antenna unit, with institute
State multiple receiving ports connected OAM demultiplexers, and the 2nd OAM gain balances being connected with the OAM demultiplexers
Device；
The OAM demultiplexers and the 2nd OAM gainequalizers are used for the N-dimensional signal s ' of receptionRjDemultiplexing and
The parallel signal s of M dimensions is exported after gain balanceRn。
With reference to the first possible embodiment of first aspect, the embodiments of the invention provide second of first aspect
Possible embodiment, wherein, the multiple transmission antenna unit and the multiple reception antenna unit are dipole antenna,
The direction of the multiple transmission antenna unit and the axis parallel of first circumference；The side of the multiple reception antenna unit
To the axis parallel with second circumference.
With reference to second of possible embodiment of first aspect, the embodiments of the invention provide the third of first aspect
Possible embodiment, wherein, the radius of the radius of first circumference and second circumference is all higher than the OAM electromagnetic waves
Twice of wavelength.
With reference to one kind of first aspect or second or the third possible embodiment, the embodiments of the invention provide
4th kind of possible embodiment of one side, wherein, first reflector and second reflector are rotary parabolic
Face, the center of circle of first circumference is located in the focus of first reflector, and the center of circle of second circumference is located at described the
In the focus of two reflectors, the focus of first reflector is located in the mouth face of the transmission antenna unit, and described second is anti-
The focus of emitter is located in the mouth face of the reception antenna unit.
With reference to the 4th kind of possible embodiment of first aspect, the embodiments of the invention provide the 5th of first aspect kind
Possible embodiment, wherein, the main shaft axially each parallel to first reflector of the multiple transmission antenna unit, institute
State the main shaft axially each parallel to second reflector of multiple reception antenna units；Or
The axial direction of the multiple transmission antenna unit is each perpendicular to the main shaft of first reflector, the multiple reception day
The axial direction of line unit is each perpendicular to the main shaft of second reflector.
Second aspect, the embodiments of the invention provide a kind of OAM electromagnetic transmissions method, applied to above-mentioned OAM electromagnetic waves
Transmitting device, methods described includes：
The emitter obtains the parallel signal s of the dimensions of the M after baseband modulation and channel equalizationTn；
The parallel signal S that the M is tieed upTnGain balance and OAM multiplexings are carried out, the antenna excitation signal s ' of N-dimensional is obtainedTj；
By the antenna excitation signal S ' of the N-dimensionalTjLaunched by transmission antenna unit.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the first of second aspect, the side
Method also includes：
The N-dimensional signal s ' that the reception device is launched the emitterRjReceived；
By the N-dimensional signal s 'RjDemultiplexed and gain balance, obtain the parallel signal s of M dimensionsRn。
With reference to second aspect, the embodiments of the invention provide the possible embodiment of second of second aspect, in maximum
Can parallel transmission pattern count M=2 when, methods described includes：
Two code elements sequence vector [S of the emitter to continuous timeT11-12,ST21-22] transmitting symbol c1 and c2 according to
Following matrix is arranged, and forms two state Alamounti Scheme space-time transmitting diversities：
Wherein, H is complex conjugate transposition；
Reception device is demultiplexed to two states received, by the sequence vector of receive two continuous times
[SR11-12,SR21-22] as follows with default complex conjugate multiplication：
Obtain OAM state emission diversity gains.
Wherein, Alamounti Scheme space-times transmitting diversity and STBC have in following address clearly explains：
http://en.wikipedia.org/wiki/Space%E2%80%93time_block_code。
With reference to second of possible embodiment of second aspect, the embodiments of the invention provide the third of second aspect
Possible embodiment, methods described also includes：For the two code elements sequence vector [S of Q continuous timeT11-1M,…
STQ1-QM], encoded using Q × M Space-Time Block Coding STBC, complete transmitting diversity.
Device and method provided in the embodiment of the present invention, to the reflector in OAM electromagnetic transmission devices, antenna list
Arrangement mode of member etc. has carried out many-sided design so that the device in the embodiment of the present invention can significantly improve OAM electromagnetism
While the transmission range of ripple, additionally it is possible to using different orbital angular momentum modes in parallel transmission information in direct projection environment, from
And wireless communication capacity can be significantly improved.
Further, device provided in an embodiment of the present invention, it is ingenious in design, easy to implement, OAM electromagnetic waves can be significantly improved
Transmission range, with prominent substantive distinguishing features and marked improvement, be adapted to large-scale promotion application.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows a kind of radiation diagram of the prior art；
Fig. 2 shows a kind of structural representation of transmitting device provided in an embodiment of the present invention；
Fig. 3 shows the structural representation of another transmitting device provided in an embodiment of the present invention；
Fig. 4 shows a kind of system block diagram for emitter that the embodiment of the present invention is provided；
Fig. 5 shows OAM multiplexers and the first OAM gain balances in a kind of emitter that the embodiment of the present invention is provided
The operating diagram of device；
Fig. 6 shows a kind of system block diagram for reception device that the embodiment of the present invention is provided；
Fig. 7 shows that OAM demultiplexers and the 2nd OAM gains are equal in a kind of reception device that the embodiment of the present invention is provided
The operating diagram of weighing apparatus；
Fig. 8 shows the radiation diagram of a kind of pattern 1 that the embodiment of the present invention is provided；
Fig. 9 shows Fig. 8 X-Y plane figure；
Figure 10 shows Fig. 8 X-Z plane figure；
Figure 11 shows the radiation diagram of another pattern 3 that the embodiment of the present invention is provided；
Figure 12 shows Figure 11 X-Y plane figure；
Figure 13 shows Figure 11 X-Z plane figure；
Figure 14 shows the radiation diagram of another pattern 5 that the embodiment of the present invention is provided；
Figure 15 shows a kind of transmitting schematic flow sheet that the embodiment of the present invention is provided；
Figure 16 shows a kind of reception schematic flow sheet that the embodiment of the present invention is provided；
Figure 17 shows another transmitting schematic flow sheet that the embodiment of the present invention is provided；
Figure 18 shows another reception schematic flow sheet that the embodiment of the present invention is provided.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be arranged and designed with a variety of configurations herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
Embodiment 1
In March, 2011, space physics research institute of Sweden Thide teaches group and carried out in the Italian Venetian lagoon water surface
A kind of new physical mechanism of experiment shows, to realize identical frequency band can carry bigger transmission capacity.The experiment is first
Radio wave frequency ranges 2.4GHz OAM multiplexed communications are realized, the incoherent electricity of state 1 and state 0 is respectively at using two-way OAM
Ripple, realizes same frequency state point multiplexed communications, as shown in Figure 1 in 442 meters of air line distance.Designer it has been investigated that, existing OAM
The electric rotating magnetic wave used is a zero point at center, and the intensity of electromagnetic wave is very small, close to zero, so transmission range is not
Far, minimum amplitude is just decayed in the front of electromagenetic wave radiation, it is impossible to transmit signal；In addition, double lifting channel capacity is still
So not enough, it is impossible to meet actual demand, user lifts channel capacity with being badly in need of more times.
In order to improve above mentioned problem, through multi-party experiment, selection is communicated using multi-antenna array in the embodiment of the present invention,
But communicate different from smart antenna with MIMO, MIMO communications can only be realized in multiple scattering environment to be passed in same frequency parallel
Defeated information, and it is unable to parallel transmission information in free space or direct projection environment；Smart antenna is unable to parallel transmission information, only
There is the effect of increase receiving power in direct projection environment.Designer it has been investigated that, communicated using multi-antenna array
When, if multiple antenna elements are arranged as into perimeter antenna array on reflector, by the direction of the launch of each antenna element, phase
Heart etc. carry out it is ingenious set, then transmitting device can be caused to significantly improve the transmission range of OAM electromagnetic waves so that transmitting device can be with
Using different orbital angular momentum modes in parallel transmission information in direct projection environment, wireless communication capacity is improved.
Based on the studies above, as shown in Fig. 2 the embodiments of the invention provide a kind of OAM electromagnetic transmissions device, including hair
Injection device, the emitter includes the first reflector and multiple transmission antenna units；The multiple transmission antenna unit is uniform
It is arranged on the first circumference on first reflector, the phase center of each transmission antenna unit is respectively positioned on institute
State on the first circumference, the radiation direction of each transmission antenna unit is towards first reflector, first circumference
The center of circle be located at first reflector main shaft on.Schematic diagram when Fig. 2, Fig. 3 are a kind of antenna element number N=8.
Wherein, preferably multiple transmission antenna units are dipole antenna, and each dipole antenna direction and institute
The axis parallel of the first circumference is stated, the length of each dipole antenna is a quarter of OAM electromagnetic wavelengths, the first circle
The radius in week is more than twice of the OAM electromagnetic wavelengths.Dipole antenna is mainly used to launch and receives the letter of fixed frequency
Number, compared with mostly using broad-band antenna in the prior art, site attenuation and antenna factor are more suitable for using dipole antenna
Measurement.
It is preferred that the first reflector is the paraboloid of revolution, the center of circle of first circumference is located at the focus of first reflector
On, preferably the paraboloid of revolution is sufficiently large, and the focus of first reflector is located in the mouth face of the transmission antenna unit.
It should be noted that, it is above-mentioned in, phase center is a theoretic point, for example：Aerial radiation is thought in theory
Signal be that, using certain point as the center of circle, to external radiation, this point is exactly so-called phase center.
The selection of reflector has a variety of, for example：For the minute surface of piece, spherical mirror, wherein, main shaft is to link sphere
Vertex point and the chain-dotted line at minute surface center；Focus is to be mapped to the paraxial rays of main axis parallel on sphere, and reflection light is converged at
On main shaft a bit, this point is referred to as focus.
Wherein, the main shaft axially each parallel to first reflector of preferably the multiple transmission antenna unit, or institute
The axial direction for stating multiple transmission antenna units is each perpendicular to the main shaft of first reflector.
By above-mentioned, when implementing, N number of transmission antenna unit, preferably dipole antenna need to be evenly arranged in
On the first circumference on the first reflector, the preferably direction of dipole antenna and the first circumference axis parallel, from 1/4
Wave dipole sub-antenna, dipole antenna phase center is located on the first circumference, and the first radius of a circle preferably is more than two times of ripples
Long, the center of circle of the first circumference is located at the first reflector, and preferably in the focus of the paraboloid of revolution, preferably the paraboloid of revolution is enough
Greatly, its focus is within the mouth face of dipole antenna, the first reflector of each dipole antenna main radiation direction direction.Wherein,
Each dipole antenna is by a signal source forcing, and the signal on j-th of antenna element is：
Wherein, i is complex unit, and ω is the angular frequency of radiofrequency signal, and N is the antenna element number of perimeter antenna array, n-1
The sequence number of the OAM moulds of parallel transmission, M be maximum can parallel transmission pattern count, j is the sequence number of antenna element.
As shown in Figure 3, Figure 4, each transmission antenna unit is connected with a transmitting excitation port respectively, launches excitation port
Pass through upward signal wave filter fuIt is connected with OAM multiplexer OAM Multiplexer, signal is after upward signal filter filtering
Row transmission again, OAM multiplexers are connected with the first OAM gainequalizer OAM Equilizer, and the first OAM gainequalizers have M
Input signal STn, each input signal can parallel transmission information, the preferred input signal S when implementingTnIt is to be adjusted by base band
Output after system and channel equalization, M dimensional signals vector.
In the embodiment of the present invention, preferably OAM multiplexers and the first OAM gainequalizers is matrix multiplier, such as Fig. 5 institutes
Show, multiplication is realized in the two series connection, by M dimensional signals S waiting for transmissionTnAntenna through being multiplexed with N-dimensional being converted to after gain balance swashs
Encourage signal S 'Tj。
As shown in above-mentioned formula, G diagonal in the first OAM gainequalizer OAM Equilizer coefficient such as formula
Element, OAM multiplexer OAM Multiplexer each submodule Sub Multiplexer multiplier coefficients OT jnIt is public
O in formulaTJth row n row element.
STIt is the M dimension symbolic vectors for needing independent parallel to transmit, S 'TIt is the N-dimensional pumping signal in each transmission antenna unit
Vector, OTIt is OAM transmitting modulation matrixs, GTIt is transmission antenna unit gain balance matrix.GX (0~M-1)It is x-th of individual transmission
Gain of the pattern in the main shaft transmission direction in transmission antenna unit, it is different with ordinary antennas, to every in the embodiment of the present invention
Individual pattern, although frequency is identical, gain is but all different.N is antenna element number.
Above aerial array, reflector and including transmitting excitation port, OAM multiplexers, the structure such as the first OAM gainequalizers
Into pumping signal conversion module collectively constituted OAM electromagnetic wave launchers.
Based on same principle, the embodiment of the present invention additionally provides a kind of OAM electromagnetic receiving devices, the reception device bag
Include the second reflector and multiple reception antenna units；The multiple reception antenna unit is evenly arranged in positioned at the described second reflection
On the second circumference on device, the phase center of each reception antenna unit is respectively positioned on second circumference, each described
The radiation direction of reception antenna unit is towards second reflector, and the center of circle of second circumference is located at the described second reflection
On the main shaft of device, each the mouth face of the mouth face of the reception antenna unit respectively just to a transmission antenna unit, described
The major axes orientation of the major axes orientation of second reflector and first reflector is located along the same line.
Wherein, preferably multiple reception antenna units are dipole antenna, and each dipole antenna direction and institute
The axis parallel of the second circumference is stated, the length of each dipole antenna is a quarter of OAM electromagnetic wavelengths, the second circle
The radius in week is more than twice of the OAM electromagnetic wavelengths.
It is preferred that the second reflector is the paraboloid of revolution, the center of circle of second circumference is located at the focus of second reflector
On, preferably the paraboloid of revolution is sufficiently large, and the focus of second reflector is located in the mouth face of the reception antenna unit.
Wherein, the main shaft axially each parallel to second reflector of preferably the multiple reception antenna unit, or institute
The axial direction for stating multiple reception antenna units is each perpendicular to the main shaft of second reflector.
By above-mentioned, when implementing, by N number of reception antenna unit, preferably dipole antenna is evenly arranged in the
On two circumference, the preferably direction of dipole antenna and the second circumference axis parallel, from 1/4 wave dipole sub-antenna, dipole
Sub-antenna phase center is located on the second circumference, and the second radius of a circle preferably is more than two times of wavelength, the center of circle position of the second circumference
In the second reflector, preferably in the focus of the paraboloid of revolution, preferably the paraboloid of revolution is sufficiently large, and its focus is in dipole antenna
Mouth face within, each dipole antenna main radiation direction is towards the second reflector.Wherein, reception antenna unit mouthful is in face of quasi- hair
Antenna element mouthful face is penetrated, the major axes orientation of reception antenna unit and the major axes orientation of transmission antenna unit are on the same line.
As shown in fig. 6, each reception antenna unit is connected with a receiving port respectively, receiving port passes through downstream signal
Wave filter fdIt is connected with OAM demultiplexer OAM De-Multiplexer, OAM demultiplexers and the 2nd OAM gainequalizers OAM
Equilizer is connected, and the 2nd OAM gainequalizers have M output signal sRn, each output signal is carried parallel independently to be believed
Breath, preferably output signal sRnIt is balanced and base band demodulator the input signal of channel solution, is M dimensional signals vector.As shown in fig. 7,
It is preferred that OAM demultiplexers and the 2nd OAM gainequalizers are matrix multiplier, multiplication is realized in the two series connection, for that will receive
The N-dimensional signal s ' that antenna element is receivedRjThe parallel signal s of output M dimensions after demultiplexing and gain balanceRn。
Wherein, i is complex unit, and N is the antenna element number of perimeter antenna array, and n-1 is the sequence of the OAM moulds of parallel transmission
Number, M be maximum can parallel transmission pattern count, j is the sequence number of antenna element.
As shown in above-mentioned formula, G diagonal in the 2nd OAM gainequalizer OAM Equilizer coefficient such as formula
Element, OAM demultiplexer OAM De-Multiplexer each submodule Sub Multiplexer multiplier coefficients
oR njIt is O in formulaRLine n j column elements.
SRIt is the M dimension symbolic vectors for needing independent parallel to transmit, S 'RIt is the N-dimensional reception signal on each reception antenna unit
Vector, ORIt is OAM transmitting modulation matrixs, GRIt is the balanced matrix of reception antenna module gain, for same antenna, GT=GR。
GX (0~M)It is gain of the pattern of x-th of individual transmission in the main shaft transmission direction on reception antenna unit, OAM antennas and general
Exceedingly high line is different, to each pattern, although frequency is identical, and gain is but all different.N is antenna element number, and k is the difference of transmission
Exponent number between pattern is poor.
Above aerial array, reflector and including receiving port, OAM demultiplexers, the 2nd OAM gainequalizers etc. constitute
Reception signal conversion module collectively constituted OAM electromagnetic receiving devices.
Above-mentioned emitter and reception device are combined, transmitted in both directions just can be realized.Transmitting and reception can be given with duplexer
To distinguish, for example：From the wave filter of different frequency, such as：Upward signal wave filter, downstream signal wave filter, or switch, or
Circulator etc..
On the basis of the above, make the information of parallel individual transmission all equal, multi-mode diversity transmission can also be carried out and divided
Collection receive, it is above-mentioned in each matrix multiplier can be reduced to the weighting phase-shifting transformer on each branch road, each converter
Multiplier value is as shown in following formula：
Wherein, i is complex unit, and N is the antenna element number of perimeter antenna array, and n-1 is the sequence of the OAM moulds of parallel transmission
Number, M be maximum can parallel transmission pattern count, j is the sequence number of antenna element.
Based on above-mentioned formula, the embodiments of the invention provide wherein several embodiments：
If N=8, M=3, ST=1
If Gi is the antenna gain of each pattern, then：
If N=16, M=8, ST2、4、6、8=1, ST1,3,5,7=0
If Gi is the antenna gain of each pattern, then：
For the amplitude and phse conversion coefficient formula such as Φ in array signal transmitting and each signal branch receivedTj
And ΦRJ.The change of each pattern change divided by the pattern radiation gain, the emittance of each pattern can be made equal, with
Obtain maximum energy delivery efficiency, i.e. maximum spectral efficiency under equal-wattage.
Based on above-mentioned embodiment, in order to verify the practical application effect of the embodiment of the present invention, the embodiment of the present invention is provided
When pattern P is 1, using transmitting device in the embodiment of the present invention after being transmitted by ten thousand metres major axes orientation spoke
Figure is penetrated, as shown in figs. 8-10；When pattern P is 3, using the transmitting device in the embodiment of the present invention by ten thousand metres transmission
Afterwards in the radiation diagram of major axes orientation, as shown in Figure 11~13；When pattern P is 5, using the transmitting device in the embodiment of the present invention
In the radiation diagram of major axes orientation after being transmitted by ten thousand metres, as shown in figure 14.
Fig. 8~Figure 14 in the embodiment of the present invention and Fig. 1 of the prior art is contrasted it will be evident that using the present invention
The spiral wavefront properties of OAM electromagnetic waves are fairly obvious under transmitting device in embodiment, three patterns, there is obvious spiral shape
Equiphase surface, it is middle without cavity, therefore can be with long-distance transmissions.
Transmitting device in empirical tests, the embodiment of the present invention can be using the pattern count of parallel transmission as 1~N-1, such as：It is maximum
Can parallel transmission pattern count N=16, can with parallel transmission n be equal to 0,1,3,5,7 this 5 patterns.
Embodiment 2
On the basis of embodiment 1, the embodiments of the invention provide a kind of OAM electromagnetic transmissions method, applied to implementation
OAM electromagnetic transmission devices in example 1, as shown in figure 15, carrying out data transmitting includes step S100：The emitter is obtained
The parallel signal s of M dimensions after baseband modulation and channel equalizationTn；Step S101：The parallel signal s that the M is tieed upTnEnter
Row gain balance and OAM multiplexings, obtain the antenna excitation signal s ' of N-dimensionalTj；Step S102：By the antenna excitation signal of the N-dimensional
s’TjLaunched by transmission antenna unit.
As shown in figure 16, carrying out data receiver includes step S200：The N that the reception device is launched the emitter
Dimensional signal s 'RjReceived；Step S201：By the N-dimensional signal s 'RjDemultiplexed and gain balance, obtain M dimension and
Row signal sRn。
Maximum can parallel transmission pattern count M=2 when, methods described includes：
Two code elements sequence vector [S of the emitter to continuous timeT11-12,ST21-22] transmitting symbol c1 and c2 according to
Following matrix is arranged, and forms the Alamounti Scheme transmitting diversities of two states：
Wherein, H is complex conjugate transposition；
Reception device is demultiplexed to two states received, by the sequence vector of receive two continuous times
[SR11-12,SR21-22] as follows with default complex conjugate multiplication：
Obtain OAM state emission diversity gains.
Wherein, for the two code elements sequence vector [S of Q continuous timeT11-1M,…STQ1-QM], use Q × M space-time
Block code STBC is encoded, and completes transmitting diversity.
Based on the above method, as shown in figure 17, carry out data transmitting and specifically include step S301：Emitter is to consecutive hours
Between the symbol c1 and c2 of two code elements sequence vector transmitting arranged, the Alamounti Scheme for forming two states launch
Diversity；Step S302：The emitter obtains the two-dimentional parallel signal after baseband modulation and channel equalization；Step
S303：The two-dimentional parallel signal is subjected to gain balance and OAM multiplexings, the antenna excitation signal of N-dimensional is obtained；Step
S304：The antenna excitation signal of the N-dimensional is launched by transmission antenna unit.
As shown in figure 18, carrying out data receiver includes step S400：The N that the reception device is launched the emitter
Dimensional signal is received；Step S401：The N-dimensional signal is demultiplexed and gain balance, the parallel signal of two dimension is obtained；
Step S402：Two-dimentional state transmitted diversity signals are decoded, state point diversity gain is obtained.
The technique effect and aforementioned means embodiment phase of the method that the embodiment of the present invention is provided, its realization principle and generation
Together, to briefly describe, embodiment of the method part does not refer to part, refers to corresponding contents in aforementioned means embodiment.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of orbital angular momentum OAM electromagnetic transmission devices, it is characterised in that including emitter, the emitter bag
Include the first reflector and multiple transmission antenna units；
The multiple transmission antenna unit is evenly arranged on the first circumference on first reflector, each hair
The phase center for penetrating antenna element is respectively positioned on first circumference, the equal direction of radiation direction of each transmission antenna unit
First reflector, the center of circle of first circumference is located on the main shaft of first reflector, the multiple transmitting antenna
Unit is dipole antenna；The direction of the multiple transmission antenna unit and the axis parallel of first circumference；
The emitter also include with the one-to-one multiple transmitting excitation ports being connected of the multiple transmission antenna unit, with institute
State multiple transmitting excitation ports connected OAM multiplexers, and the first OAM gain balances being connected with the OAM multiplexers
Device；
The OAM multiplexers and the first OAM gainequalizers are used for the parallel signal s for tieing up M waiting for transmissionTnIt is equal through gain
The antenna excitation signal s ' of N-dimensional is converted to after weighing apparatus and multiplexingTj。
2. OAM electromagnetic transmissions device according to claim 1, it is characterised in that also including reception device, the reception
Device includes the second reflector and multiple reception antenna units；
The multiple reception antenna unit is evenly arranged on the second circumference on second reflector, each described to connect
The radiation direction of antenna element is received towards second reflector, the center of circle of second circumference is located at second reflector
Main shaft on, the mouth face of the mouth face of each reception antenna unit respectively just to a transmission antenna unit, described the
The major axes orientation of the major axes orientation of two reflectors and first reflector be located along the same line or with first reflector
Major axes orientation formation less than 60 degree of angle；
The reception device also include with the one-to-one multiple receiving ports being connected of the multiple reception antenna unit, it is and described many
Individual receiving port connected OAM demultiplexers, and the 2nd OAM gainequalizers being connected with the OAM demultiplexers；
The OAM demultiplexers and the 2nd OAM gainequalizers are used for the N-dimensional signal s ' of receptionRjDemultiplexing and gain
The parallel signal s of M dimensions is exported after equilibriumRn。
3. OAM electromagnetic transmissions device according to claim 2, it is characterised in that the multiple transmission antenna unit and
The multiple reception antenna unit is dipole antenna, the direction of the multiple transmission antenna unit and first circumference
Axis parallel；The direction of the multiple reception antenna unit and the axis parallel of second circumference.
4. OAM electromagnetic transmissions device according to claim 3, it is characterised in that the radius of first circumference and institute
The radius for stating the second circumference is all higher than twice of the OAM electromagnetic wavelengths.
5. the OAM electromagnetic transmission devices according to claim 2~4 any one, it is characterised in that first reflection
Device and second reflector are the paraboloid of revolution, and the center of circle of first circumference is located at the focus of first reflector
On, the center of circle of second circumference is located in the focus of second reflector, and the focus of first reflector is positioned at described
In the mouth face of transmission antenna unit, the focus of second reflector is located in the mouth face of the reception antenna unit.
6. OAM electromagnetic transmissions device according to claim 5, it is characterised in that the multiple transmission antenna unit
Axially each parallel to the main shaft of first reflector, the axial direction of the multiple reception antenna unit is anti-each parallel to described second
The main shaft of emitter；Or
The axial direction of the multiple transmission antenna unit is each perpendicular to the main shaft of first reflector, the multiple reception antenna list
The axial direction of member is each perpendicular to the main shaft of second reflector.
7. a kind of OAM electromagnetic transmissions method, it is characterised in that applied to the OAM electricity described in claim 1~6 any one
Magnetic wave transmitting device, methods described includes：
The emitter obtains the parallel signal s of the dimensions of the M after baseband modulation and channel equalizationTn；
The parallel signal s that the M is tieed upTnGain balance and OAM multiplexings are carried out, the antenna excitation signal s ' of N-dimensional is obtainedTj；
By the antenna excitation signal s ' of the N-dimensionalTjLaunched by transmission antenna unit.
8. OAM electromagnetic transmissions method according to claim 7, it is characterised in that methods described also includes：
The N-dimensional signal s ' that reception device is launched the emitterRjReceived；
By the N-dimensional signal s 'RjDemultiplexed and gain balance, obtain the parallel signal s of M dimensionsRn。
9. OAM electromagnetic transmissions method according to claim 7, it is characterised in that can parallel transmission pattern count M in maximum
When=2, methods described includes：
Two code elements sequence vector [S of the emitter to continuous timeT11-12,ST21-22] transmitting symbol c1 and c2 according to as follows
Matrix is arranged, and forms the Alamounti Scheme transmitting diversities of two states：
Wherein, H is complex conjugate transposition；
Reception device is demultiplexed to two states received, by the sequence vector of receive two continuous times
[SR11-12,SR21-22] as follows with default complex conjugate multiplication：
Obtain OAM state emission diversity gains.
10. OAM electromagnetic transmissions method according to claim 9, it is characterised in that methods described also includes：For Q
Two code elements sequence vector [the S of continuous timeT11-1M,…STQ1-QM], encoded using Q × M Space-Time Block Coding STBC, it is complete
Into transmitting diversity.
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