CN106850007A - Millimetre-wave attenuator link multi-beam shaping method and device - Google Patents
Millimetre-wave attenuator link multi-beam shaping method and device Download PDFInfo
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- CN106850007A CN106850007A CN201611191930.5A CN201611191930A CN106850007A CN 106850007 A CN106850007 A CN 106850007A CN 201611191930 A CN201611191930 A CN 201611191930A CN 106850007 A CN106850007 A CN 106850007A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/0256—Channel estimation using minimum mean square error criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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Abstract
The present invention relates to a kind of millimetre-wave attenuator link multi-beam shaping method, including：Channel covariance matrices are estimated according to pilot tone；Estimated the estimation of channel matrix singular vectors as transmitter and receiver beamforming vector according to channel covariance matrices, obtain beam forming gain.The invention further relates to the transmitter and receiver using above-mentioned millimetre-wave attenuator link multi-beam shaping method.The present invention can improve millimetre-wave attenuator beam figuration gain.
Description
Technical field
The present invention relates to millimeter wave radio transmission technical field, more particularly to a kind of millimetre-wave attenuator link multi-beam is assigned
Shape method and device.
Background technology
Beamforming technique refer to using specific algorithm weights adjust each bay sending signal range value and
Phase value, application demand is met to realize specific array aerial direction figure.The wave beam only realized in radio frequency or intermediate frequency is assigned
Shape is referred to as analog beam figuration, and the wave beam forming only realized in digital baseband is called digital beam forming, and in digital baseband
It is partially completed array element amplitude modulation, completes array element phase modulation referred to as hybrid analog-digital simulation digital beam forming in radio frequency part.Beamforming technique
It is initially applied to beam scanning in radar, sonar, military communication, target detection and tracking, space filtering and the work(such as anti-interference
Energy.
The thirties in 20th century has been proposed that the concept of phased array antenna, and beamforming technique is filled between decades thereafter
Foot development, while solid-state high power device (such as GaAs, GaN, SiC) bandwidth of operation occurs and power significantly increases, it is various passive
Military field is widely applied to active phased-array radar, for example：Defence, the space of the high speed offensive weapon such as ballistic missile
The detection of various military satellites, target search and high-resolution direction finding in spatial domain are phased as the supporting Airborne Passive of weapon
Battle array fire control radar and shipborne radar.
The nineties, as the disposal ability of DSP digital signal processing chips is rapidly improved and prices so that utilize number
Word signal processing method carries out wave beam forming and is further possibly realized in base band, therefore adaptive array antenna starts to be applied to nothing
Line communication system, as anti-interference and dilatation effective means.Due to there are various interference in mobile communication, for example, mutually cadre enrolled among workers
Disturb, monkey chatter, co-channel interference and multipath fading, and adaptive array antenna can real-time adaptive produce and possess specific indexes
Spatial orientation wave beam, is directed at beam main lobe mobile station (MS) and secondary lobe or zero point is aligned into interference radiating way, thus can reduce
Interference improves gain.Array antenna can realize space division multiple access (SDMA), in traditional frequency division multiple access (FDMA), time division multiple acess
(TDMA) availability of frequency spectrum and outside CDMA (CDMA) is further improved.
Adaptive array antenna its beamforming technique, can also be by fixed codebook beam switchover except using adaptive algorithm
Technology.I.e. in the pre-set limited multiple beam shape-endowing weight value vectors in base station, referred to as code book, each beamforming vector can be right
A beam pattern should be produced (enumerating these directional diagrams should discretely scan whole space).When user is when mobile,
According to the subscriber signal for receiving, according to certain criterion (such as received signal strength), the optimal code book of selection is concentrated from code book
Optimize the directional diagram of wave beam.When user is moved to the edge zone of fixed adjacent beams, the weak reception of subscriber signal is poor, because
This fixed codebook beam switchover can not realize the optimum reception of signal, but with up direction of arrival (DOA) need not be judged
The advantages of with without complicated self-adapting algorithm, can reduce base station real-time processing pressure.
Due to many merits of beamforming technique, three big 3G standards support that intelligent antenna technology, WiMAX are also supported certainly
Antenna system (AAS, the AdaptiveAntenna System) technology of adaptation, and 4G LTE are even more in its R8 version in TM7 with special
With the single current beamforming scheme based on port 5 defined based on pilot tone, defined based on new end in TM8 in its R9 version
Mouth 7 and the dual-stream beamforming technology (Dual-BF) of new port 8, space division multiplexing technology and beamforming technique are combined.
With the requirement to wireless mobile communications bandwidth and speed and tradition below 3GHz honeycombs movement frequency spectrum resource increasingly
Anxiety, millimeter wave frequency band 3-300GHz corresponding wavelengths 1mm-100mm is of increasing concern, and (the wherein electromagnetic wave of 3-30GHz is referred to as
Hyperfrequency (SHF), the electromagnetic wave of 30-300GHz is referred to as superfrequency (EHF), the wave-length coverage 1mm-10mm of EHF).Millimeter wave skill
Art and Massive-MIMO technologies are considered as a part for the key technology of following 5G, and many countries are also progressively open-minded
60GHz frequency spectrums nearby, the complete continual frequency spectrum resource of 7GHz or so.Millimeter wave has many advantages, such as：(have using frequency spectrum is wide
Multiple air spectral windows can be used for land mobile, and multiple Atmospheric Absorption peaks can be used for secret communication and reduce interval interference
Improve cell frequency multiplex), wavelength is short to be easy to Massive-MIMO and the system integration, and class photosensitiveness transmission characteristic wave beam is narrow anti-
Interference is strong.Especially E wave bands (71-76GHz, 81-86GHz) wave beam is narrow, directionality is good, is very suitable for Developing High-speed point-to-point
WLAN, mobile retransmission link and broadband access, but big (the oxygen absorption peak of 60GHz frequency ranges of propagated loss
Nearby loss reaches 15dB/Km to value), barrier decay significantly, rainfall attenuation it is serious, cause remote NLOS (Non-Line
OfSight transmitted under the conditions of) difficult, it is therefore desirable to which bigger antenna gain provides gain margin, compared to diversity technique, multi-hop
Route, beamforming technique can not only lift antenna array gain while signal mutual interference can be reduced by forming orientation narrow beam,
It is to lift the essential key technology of millimeter-wave communication system performance.
Existing millimeter wave beam figuration technology mainly has following several, but has certain defect and deficiency：
A) classical Pattern Synthesis technology；
Pattern Synthesis technology is applied to phased-array radar, i.e., only consider the wave beam forming of transmitting terminal and the array of receiving terminal
Signal transacting (transmitting terminal and receiving terminal are often identical array antenna), it is this under the conditions of, target only one of which point, to anti-
It is emitted back towards ripple.By fierce to the different range value of each antenna and phase value so that space is folded without the reception signal of angle
Extra show is different by force, so as to form specific directional diagram.
Classical Pattern Synthesis method is applied to following several situations：(1) only give anticipated orientation figure main lobe width and
Minor level.(2) anticipated orientation diagram shape and acceptable error range are given, error criterion is probably mean square error, maximum
Error etc..(3) anticipated orientation figure and known direction figure are given, it is desirable to by finely tuning parameter so that known direction figure approaches expection side
To figure (perturbation method).
Classical Pattern Synthesis method has：Woodward synthesis, Chebyshev's synthesis, Taylor's synthesis, Fourier
Converter technique, perturbation method, weighted least-squares method etc..For example：Woodward-Lawson (Woodward-Lawson) synthesis is first right
Anticipated orientation figure is sampled on discrete location, is divided into two kinds of situations of continuous line-source antenna and discrete linear array.
Major defect：1) do not apply to.Due to being that direction finding, positioning and tracking are carried out to extraterrestrial target, determine it is to send out
Send directional diagram and receiving pattern to be oriented to, often isolate treatment, and have target of the expected directional diagram as wave beam forming.
And for communication, target is entirely different, to realize that transmission signal gain is maximized, emitter, channel and receiver three
Consider, and it is available without predetermined directional diagram.2) and, the method for sampling can be not necessarily realized to anticipated orientation figure
Approach well.
B) is based on the Pattern Synthesis technology of random algorithm；
From unlike the classical Pattern Synthesis method based on sampling, this technology uses random algorithm (for example：Heredity
Algorithm) and the thinking successively planned obtain meeting the result that any area of space directional gain covering is required, i.e. predetermined direction
Figure.Genetic algorithm and BFGS algorithms are combined to form into genetic algorithm, search space is reduced, is reduced amount of calculation, improves convergence
Speed.Some special anticipated orientation figures can be solved (such as：Sphere coverage direction figure under satellite) problem of implementation.
Major defect：1) do not apply to, not only due to it is not anticipated that directional diagram can use, and, for emitter search
During any one solution for obtaining, receiver is also required to search out a preferable homographic solution, and in search procedure
Each interim solution is required for the receiving-transmitting sides to carry out signal transmission to verify its gain.Required pilot communication resource overhead is huge
Greatly, serious time delay can be caused.
C) is based on the beamforming technique of code book；
Current three big international standard ECMA387, IEEE802.15.3c and IEEE802.11ad are all employed based on code book
Beamforming technique makes up the path loss high between communication link.In defined good wave beam code book, from sector to ripple
Beam arrives fine wave beam again, and wave beam training is carried out step by step, untill the wave beam code book that the double hairs of transmitting-receiving determine Optimum Matching.
Major defect：It is difficult to optimal beam figuration.Because wave beam code book is pre-defined, therefore, transmitting-receiving is double
Hair can be adopted beamforming vector can only be chosen in the codebook, that is, the wave beam for being formed only has limited kind to select, it is impossible to protect
The beamforming vector that card finds is directed to the optimal beam forming vectors of present channel.
D) is based on the beamforming technique that channel matrix SVD is decomposed；
After current channel condition information (CSI) is obtained, singular value decomposition (SVD) can be carried out to channel matrix, obtained
To the optimal beam forming vectors of transmitter and receiver, in the case where noise jamming is excluded, optimal beam figuration is capable of achieving.
Major defect：1) when antenna number is more (such as：Massive MIMO), channel matrix will be estimated completely
Take very big time delay expense, and double hairs that to cause to communicate under time varying channel to obtain complete CSI almost unrealistic.
2) traditional SVD computational methods meeting computation complexity is high, it is necessary to great amount of hardware resources.
E) iteration beamforming technique；
In order to overcome the storage overhead and computing cost of the wave beam forming based on tradition SVD, iteration beamforming technique to exist
Iteration sends training sequence (from certain initial random vector) between transmitter and receiver, until asymptotic expansion channel square
The maximum singular vectors of battle array, the maximum singular vectors of direct estimation channel matrix.
Major defect：1) influence of noise cannot be overcome, especially under low noise conditions, noise can seriously cut down wave beam
Figuration gain.2) time varying channel (multidiameter delay and Doppler frequency shift) cannot be tracked.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of millimetre-wave attenuator link multi-beam shaping method and device,
Millimetre-wave attenuator beam figuration gain can be improved.
The technical solution adopted for the present invention to solve the technical problems is：A kind of millimetre-wave attenuator link multi-beam is provided to assign
Shape method, comprises the following steps：
(1) channel covariance matrices are estimated according to pilot tone；
(2) estimated the estimation of channel matrix singular vectors as transmitter and receiver ripple according to channel covariance matrices
Beam forming vectors, obtain beam forming gain.
The step (1) carries out channel covariance matrices estimation using the method that random vector comes and goes transmitting-receiving.
The step (1) is specially：In i-th Pilot symbol durations, random vector is chosen as transmission wave beam
Forming vectors, beamforming vector is conjugated the column vector p that will be obtained after normalization from transmitting terminal to receiving terminaliTransmission is beamed back again
End, transmitting terminal is according to column vector piObtain oneMatrix；Random vector is chosen again to be transmitted, and obtains oneMatrix, repeat n times after will be all ofMatrix it is cumulative and then be averaged, then subtract the noise of transmitting terminal
Covariance matrix is that can obtain channel covariance matrices estimation.
The step (2) is even multiplied using base band and method for normalizing obtains low complex degree beamforming vector and estimates.
The step (2) is specially：For the beamforming vector of emitter, initial answered using one in base band
Unit column vector, the continuous right side multiplies channel covariance matrices estimation, by after n iteration, then carries out being conjugated normalized and obtains
Send beamforming vector；For the beamforming vector of receiver, the continuous n times of beamforming vector will be sent and be sent to
Receiving terminal, the beamforming vector that receiving terminal will be obtained is averaged and is obtained by normalizing and receives beamforming vector.
The technical solution adopted for the present invention to solve the technical problems is：Also provide a kind of using above-mentioned millimetre-wave attenuator chain
The emitter of road multi-beam shaping method, including send beam vector maker and BBP, the transmission beam vector
Maker estimates the covariance matrix of channel matrix according to pilot tone, and calculates transmission beamforming vector, is data communication
Prepare；The signal value that time-domain information bits switch is at carrier frequency, feeding digital analog converter are entered traveling wave by the BBP
Form shape and be changed into analog signal, then carrier frequency is loaded into by up-converter module, by output and the transmission wave beam of power splitter
The preprepared beamforming vector of vector generator is multiplied in multiplier, finally sends into power amplifier by transmission array
Antenna is sent to channel.
The technical solution adopted for the present invention to solve the technical problems is：Also provide a kind of using above-mentioned millimetre-wave attenuator chain
The receiver of road multi-beam shaping method, including beam vector maker and receiving antenna array are received, the reception wave beam arrow
Amount maker estimates the covariance matrix of channel matrix according to pilot tone, and calculates reception beamforming vector, is that data are led to
Letter is prepared；The channel primary signal feeding low noise amplifier that the receiving antenna array will be received is filtered makes an uproar outside the band of part
Sound, then output by low noise amplifier exists with the preprepared beamforming vector that receives of beamforming vector maker is received
Multiplier should be multiplied with antenna pair one by one, be added by adder and sent the multiplication weighted value of all antennas into down-converter,
Data signal is converted to via analog-digital converter again, BBP is finally sent into and is reverted to the primary estimation for sending bit sequence.
Beneficial effect
As a result of above-mentioned technical scheme, the present invention compared with prior art, has the following advantages that and actively imitates
Really：The present invention improves millimetre-wave attenuator beam figuration gain (raising signal to noise ratio), overcomes the influence of millimeter wave channel fading.This hair
Bright is the lifting to schemes such as iteration wave beam forming, Pattern Synthesis figurations, can be reached under high s/n ratio and under low signal-to-noise ratio
(channel fading is serious or interference signal is too strong or is under to asymptotic optimization performance, especially lifting Low SNR
Cannot be in the case of the secret communication of high emission power transmission) signal transmission gain.
Brief description of the drawings
Fig. 1 is flow chart of the invention；
Fig. 2 is the structural representation of emitter of the invention；
Fig. 3 is the structural representation of receiver of the invention.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content for having read instruction of the present invention, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiments of the present invention are related to a kind of millimetre-wave attenuator link multi-beam shaping method, as shown in figure 1, including with
Lower step：Channel covariance matrices are estimated according to pilot tone；Estimate that channel matrix is unusual according to channel covariance matrices
The estimation of vector obtains beam forming gain as transmitter and receiver beamforming vector.It is specific as follows：
1) channel covariance matrices are estimated
Emitter is in i-th Pilot symbol durations Ti-1＜ t≤TiIt is interior, choose random vector fi(fiMeet power about
Beam | | fi| |=1) as transmission beamforming vector, the signal from transmitting terminal to receiving terminal is(P is signal work(
Rate, H is channel response matrix,It is receiving terminal noise vector, meets multiple Gauss distribution), beamed back again after conjugation normalization
Sending end：
Wherein,It is transmitting terminal noise vector, transmitting terminal obtains column vector piNo longer iteration sends afterwards, but
Obtain a matrix.Then, transmitting terminal chooses random vector f againi+1, it is dealt into after receiving terminal retransmits and obtainsBy all of n timesMatrix adds up：
Then it is averaged, then subtracts the noise covariance matrix estimation of transmitting terminalCan obtain HTThe approximation of H*.
For the ease of theory analysis, orderSo：
So：
Assuming that be stationary random process, so time approximation on the average statistical average, so：
Because f is the random vector of transmitting terminal generation, ntIt is transmitting terminal noise vector, nrIt is receiving terminal noise vector, three
Independent mutually (because f meets power constraint | | f | |=1, so E [f]=0).And：
In formula, nTIt is transmission antenna number.
So,
The noise covariance matrix that only need to again subtract receiving terminal is estimated(can purely receive noise by transmitting terminal in advance to take again
Averagely covariance matrix is asked to obtain),
So,
Because C (f)2P andAll it is constant, StIt is HTH*Approximation, as estimating for channel covariance matrices
Meter.
2) obtain and send beamforming vector
Principle：An initial multiple unit column vector f is used in base band0, the continuous right side multiplies St, it is final etc. by n iteration
It is following expression to imitate：Wherein, g is sweared again to receive signal
Amount.
Be multiplied using unitary matrice is unit battle arraySo that
Wherein, wherein, λ is channel characteristic value, and v is tenth of the twelve Earthly Branches vector.
Finally to fnConjugation normalization, obtains sending beamforming vectorTherefore to StEven multiply and normalizing in base band
Change may finally try to achieve transmission beamforming vector wt。
3) obtain and receive beamforming vector
Beamforming vector w will be sent againtContinuous n times are sent to receiving terminal, are averaged and normalize, and obtain and receive wave beam
Forming vectors.I ＆ lt receiving terminal reception value is：
So receive beamforming vector
As can be seen here, under Low SNR, the present invention can obtain the performance close to optimal beam figuration；And robust
Property the fluctuation of good curve it is small；Algorithm has convergence, as the increase of iterations can converge to an equivalent channel for stabilization
Gain.
The invention further relates to a kind of emitter, as shown in Fig. 2 mainly include BBP 101, digital analog converter 102,
Up-converter module 103, power splitter 104, multiplier 105 (phase shifter and modulus value weighting block), power amplifier 106, transmission battle array
Array antenna 107 and transmission beam vector maker 108.Its functions of modules interaction is：Send beam vector maker 108 first
The covariance matrix of channel matrix is estimated according to pilot tone, and calculates transmission beamforming vector, be that data communication is prepared,
Concrete mode millimetre-wave attenuator link multi-beam shaping method described above.BBP 101 is by time-domain information bits switch
It is the signal value (the constellation point value of such as 16QAM) at carrier frequency, feeding digital analog converter 102 carries out waveform shaping and is changed into simulation letter
Number, then carrier frequency is loaded into by up-converter module 103, the output of further power splitter 104 is pre- with transmission beam vector maker 108
First ready beamforming vector is multiplied in multiplier 105 (phase shifter and modulus value weighting block), finally sends into power and puts
Big device 106 is sent to channel by transmission array antenna 107.
The invention further relates to a kind of receiver, as shown in figure 3, mainly including receiving antenna array 201, low noise amplifier
202nd, multiplier 203 (phase shifter and modulus value weighting block), adder 204, down conversion module 205, digital analog converter 206, base
Provided with processor 207 and reception beamforming vector maker 208.Its functions of modules interaction is：Receive beam vector generation
Device 208 first estimates the covariance matrix of channel matrix according to pilot tone, and calculates reception beamforming vector, is data communication
Prepare, concrete mode millimetre-wave attenuator link multi-beam shaping method described above.Receiving antenna array 201 will be received
Channel primary signal feeding low noise amplifier 202 filters part out-of-band noise, then the output by low noise amplifier 202 and received wave
The preprepared beamforming vector that receives of beam forming vectors maker 208 answers phase with antenna pair one by one on multiplier 203
Multiply, the multiplication weighted value of all antennas is added and feeding down-converter 205 by adder 204, then via analog-digital converter
206 are converted to data signal, finally send into BBP 207 and revert to the primary estimation for sending bit sequence.
It is noted that the radio-frequency front-end of emitter stage of the invention and receiver is multi-antenna structure, antenna spacing
Particular value is not limited within 3 times of operating frequency wavelengths, on-air radio signal is sent and received.
It is seen that, the present invention improves millimetre-wave attenuator beam figuration gain (raising signal to noise ratio), overcomes millimeter wave channel
The influence of decline.The present invention is the lifting to schemes such as iteration wave beam forming, Pattern Synthesis figurations, under high s/n ratio and low
Asymptotic optimization performance can be reached under signal to noise ratio, especially (channel fading is serious or interference is believed under lifting Low SNR
It is number too strong or be cannot be in the case of the secret communication of high emission power transmission) signal transmission gain.
Claims (7)
1. a kind of millimetre-wave attenuator link multi-beam shaping method, it is characterised in that comprise the following steps：
(1) channel covariance matrices are estimated according to pilot tone；
(2) estimated to be assigned the estimation of channel matrix singular vectors as transmitter and receiver wave beam according to channel covariance matrices
Shape vector, obtains beam forming gain.
2. millimetre-wave attenuator link multi-beam shaping method according to claim 1, it is characterised in that the step (1)
The method for coming and going transmitting-receiving using random vector carries out channel covariance matrices estimation.
3. millimetre-wave attenuator link multi-beam shaping method according to claim 2, it is characterised in that the step (1)
Specially：In i-th Pilot symbol durations, choose random vector and sweared as beamforming vector, wave beam forming is sent
Measure the column vector p that be conjugated from transmitting terminal to receiving terminal and will be obtained after normalizationiTransmitting terminal is beamed back again, and transmitting terminal is according to column vector
piObtain oneMatrix；Random vector is chosen again to be transmitted, and obtains oneMatrix, repeat n times
After will be all ofMatrix it is cumulative and then be averaged, then subtract the noise covariance matrix of transmitting terminal and estimate i.e. available
Channel covariance matrices are estimated.
4. millimetre-wave attenuator link multi-beam shaping method according to claim 1, it is characterised in that the step (2)
Even multiplied using base band and method for normalizing obtains low complex degree beamforming vector and estimates.
5. millimetre-wave attenuator link multi-beam shaping method according to claim 1, it is characterised in that the step (2)
Specially：For the beamforming vector of emitter, an initial multiple unit column vector is used in base band, the continuous right side multiplies
Channel covariance matrices are estimated, by after n iteration, then carry out conjugation normalized and obtain transmission beamforming vector；It is right
For the beamforming vector of receiver, the continuous n times of beamforming vector will be sent and be sent to receiving terminal, receiving terminal will be obtained
Beamforming vector be averaged and obtain by normalizing and receive beamforming vector.
6. it is a kind of using as described in any in claim 1-5 millimetre-wave attenuator link multi-beam shaping method emitter, its
It is characterised by, including sends beam vector maker and BBP, the transmission beam vector maker is estimated according to pilot tone
The covariance matrix of channel matrix is counted out, and calculates transmission beamforming vector, be that data communication is prepared；At the base band
By the signal value that time-domain information bits switch is at carrier frequency, feeding digital analog converter carries out waveform shaping and is changed into simulation letter reason device
Number, then carrier frequency is loaded into by up-converter module, prepared in advance by the output and the transmission beam vector maker of power splitter
Good beamforming vector is multiplied in multiplier, finally sends into power amplifier and is sent to channel by transmission array antenna.
7. it is a kind of using as described in any in claim 1-5 millimetre-wave attenuator link multi-beam shaping method receiver, its
It is characterised by, including receives beam vector maker and receiving antenna array, the reception beam vector maker is according to pilot tone
The covariance matrix of channel matrix is estimated, and calculates reception beamforming vector, be that data communication is prepared；The reception
The channel primary signal feeding low noise amplifier that aerial array will be received filters part out-of-band noise, then by low noise amplifier
Output with receive beamforming vector maker it is preprepared receive beamforming vector multiplier one by one with antenna pair
Should be multiplied, the multiplication weighted value of all antennas be added by adder and sent into down-converter, then turn via analog-digital converter
Data signal is changed to, BBP is finally sent into and is reverted to the primary estimation for sending bit sequence.
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| CN107172630A (en) * | 2017-06-29 | 2017-09-15 | 电子科技大学 | For high ferro millimeter wave covering method is shaped based on distributed beams |
| CN108337023A (en) * | 2018-01-24 | 2018-07-27 | 大连理工大学 | Safety communicating method based on multi-user multi-aerial communication system and secrecy beamforming design |
| CN108983226A (en) * | 2018-07-20 | 2018-12-11 | 北京航空航天大学 | It is a kind of to be structured the formation the MIMO radar communicating integral method of modulation based on antenna |
| CN110429964A (en) * | 2019-06-14 | 2019-11-08 | 清华大学 | A kind of quick accurate wave beam tracking based on two dimensional phased aerial array |
| CN111106861A (en) * | 2019-12-06 | 2020-05-05 | 南方科技大学 | Method for beam forming by predicting millimeter wave channel distribution through angular velocity |
| CN112217541A (en) * | 2019-07-12 | 2021-01-12 | 华为技术有限公司 | Beam configuration method and device |
| CN112867030A (en) * | 2019-11-12 | 2021-05-28 | 大唐移动通信设备有限公司 | Cell multi-beam configuration method and device |
| WO2021174908A1 (en) * | 2020-03-02 | 2021-09-10 | 中兴通讯股份有限公司 | Method and apparatus for optimizing coverage of millimeter wave system, electronic device and storage medium |
| CN113906696A (en) * | 2019-06-11 | 2022-01-07 | 华为技术有限公司 | Data transmission method and device |
| CN115149985A (en) * | 2022-06-30 | 2022-10-04 | 成都志诚信通科技合伙企业(有限合伙) | Multiphase self-adaptive multi-beam forming system and method |
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| CN111106861A (en) * | 2019-12-06 | 2020-05-05 | 南方科技大学 | Method for beam forming by predicting millimeter wave channel distribution through angular velocity |
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| CN115149985A (en) * | 2022-06-30 | 2022-10-04 | 成都志诚信通科技合伙企业(有限合伙) | Multiphase self-adaptive multi-beam forming system and method |
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