CN106506133A - The extensive mimo system pilot tone pond in broadband and channel information acquisition method and device - Google Patents
The extensive mimo system pilot tone pond in broadband and channel information acquisition method and device Download PDFInfo
- Publication number
- CN106506133A CN106506133A CN201610979611.4A CN201610979611A CN106506133A CN 106506133 A CN106506133 A CN 106506133A CN 201610979611 A CN201610979611 A CN 201610979611A CN 106506133 A CN106506133 A CN 106506133A
- Authority
- CN
- China
- Prior art keywords
- pilot
- user
- sequence
- pilot frequency
- channel
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- 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
- H04B7/0413—MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
-
- H04L27/2611—
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention proposes the extensive mimo system pilot tone pond in broadband and channel information acquisition method and device.Sequence construct ascending pilot frequency pond and descending pilot frequency pond after using Zadoff Chu sequences and its through ovennodulation.The each sending port of up each user（Antenna or wave beam）The pilot signal of upper transmission is chosen from ascending pilot frequency pond, base station side is according to channel statistical information, implement ascending pilot frequency scheduling of resource, determine the pilot signal sent in each sending port of each user, each user sends uplink pilot signal on same running time-frequency resource simultaneously, and base station side estimates the up channel parameter of each user accordingly.Down-bound pilot frequency signal is sent in Beam Domain, and the pilot frequency sequence sent on each wave beam is chosen in descending pilot frequency pond, and base station is on each wave beam while pilot signal transmitted, user is according to the pilot signal estimation channel parameter for receiving.In each user's moving process, dynamically implement pilot tone scheduling with the change of channel characteristic when long.The present invention can significantly reduce the pilot-frequency expense of system, improve the spectrum efficiency and power efficiency of wireless communication system.
Description
Technical field
The present invention relates to a kind of extensive MIMO multi-user pilots design in broadband and channel information acquisition method and device, especially
Which is related to a kind of extensive mimo system multi-user uplink and downlink pilot tone of broadband multiuser based on Zadoff-Chu sequence and sets
Meter and channel information acquisition method and device.
Background technology
Extensive MIMO has non-at the aspect such as raising power efficiency and spectrum efficiency, suppression interference and Robust Transmission
Often big advantage, is one of future mobile communications key technology.OFDM (OFDM) technology can be by broad-band channel
It is decomposed into multiple parallel narrow band channels, it is adaptable to actual radio propagation channel.Extensive MIMO is combined with OFDM under being
One of development trend of generation wide-band mobile communication system.
In practical wireless communication systems, in order to accurately and timely obtain channel information, frequently with based on pilot aided
Channel estimation methods.For the extensive MIMO-OFDM wireless communication systems of multi-user, channel parameter meeting to be estimated in a large number
Cause huge pilot-frequency expense, while linear minimum mean-squared error channel estimation needs higher dimensional matrix inversion operation, realize complicated
Degree is higher.The pilot-frequency expense for how reducing system and the complexity for reducing channel estimation are extensive mimo system urgent need to resolve
One of key problem.
When carrying out perfect reconstruction using compressed sensing, random measurement matrix can provide optimal performance, but in reality
Need to store and access random matrix in application, and hardware implementation cost is higher.Some structural measurements are had studied at present
Matrix, such as random convolution matrix, Toeplitz structure random matrixes, random sequences modulation build calculation matrix etc., certain
The randomness of calculation matrix is reduced in degree, but still cannot avoid randomness, be also less susceptible to expand in existing system.
Therefore the calculation matrix of the property determined is highly desirable to.
Zadoff-Chu sequence has good cycle autocorrelation and cross correlation, is used as at present referring in LTE
Signal sequence.Stronger space office is typically exhibited out using the good relevant nature of Zadoff-Chu sequence and extensive mimo channel
The characteristics of portion's property and time domain sparse characteristic, The present invention gives a kind of broadband multiuser based on Zadoff-Chu sequence is extensive
Mimo system uplink and downlink channel method of estimation.The method not only can significantly reduce the pilot-frequency expense of system, and more have
Realize beneficial to real system.
Content of the invention
Goal of the invention：It is an object of the invention to provide a kind of broadband multiuser based on Zadoff-Chu sequence is extensive
Mimo system uplink and downlink pilot design and channel information acquisition method and device, save the pilot-frequency expense of system and reduce believing
The complexity that road is estimated.
Technical scheme：For achieving the above object, the present invention is adopted the following technical scheme that：
A kind of extensive mimo system multi-user ascending pilot frequency design in broadband and channel information acquisition method, including：To be many
The individual Zadoff-Chu sequence generated by the different radical exponents and its Sequence composition after different modulating factor modulations is up leads
Frequency pond；It is that each sending port of each user chooses uplink pilot signal from ascending pilot frequency pond that pilot tone scheduling is implemented in base station, and will choosing
Select result and be sent to each user；In up channel training, user sends uplink pilot signal, and base station is according to the pilot tone letter for receiving
Number implement channel information acquisition.
The extensive mimo system in the broadband adopts the OFDM with Cyclic Prefix (OFDM) modulation system, upper
In row channel training, in cell, each user sends up leading on multiple subcarriers of one or more continuous OFDM symbols simultaneously
Frequency signal, base station carry out the uplink channel estimation of each user in cell according to the pilot signal for receiving.
The radical exponent of Zadoff-Chu sequence is generated in coprime with sequence length and less than sequence length all positive integers
Middle selection.
It is that the criterion that each sending port of each user chooses uplink pilot signal is from ascending pilot frequency pond：In different districts
The radical exponent of the pilot frequency sequence that user uses is different；In same cell, the root of the pilot frequency sequence that two different sending ports are used
Index is identical or different, and when radical exponent is identical, the modulation factor of its corresponding pilot frequency sequence is different.
Implement ascending pilot frequency resource tune according to the radical exponent that channel statistical information and each cell can be used to generate pilot tone in base station
Degree, adoptable pilot tone dispatching algorithm include but is not limited to exhaustive search and greedy algorithm；After the completion of ascending pilot frequency scheduling, base station
By the radical exponent and modulation factor of each user uplink pilot frequency sequence, or both coding, each use is sent to by downlink
Family.
Using coloring algorithm, base station realizes that pilot resources are dispatched according to given criterion, the given criterion is included but is not limited to
Channel estimation mean square error sum minimum (MMSE) criterion；Step under MMSE criterions includes：
Initialising subscriber set and distributed pilot tone user set；
The user in all users selecting channel registration sum maximum, is that each of which sending port is sequentially allocated first
The corresponding pilot tone of the different modulating factor under radical exponent, if the corresponding pilot tone of the first radical exponent not enough, selects next radical exponent pair
The pilot tone that answers, updates the user's set for having distributed pilot tone after being assigned；
In the user of all unallocated pilot tones, the use maximum with the channel registration sum for distributing pilot tone user is selected
Family, if such user's more than one, selects maximum with the channel registration sum of all unallocated pilot tone users wherein
User, find out in unappropriated modulation factor under currently distribution radical exponent meet the lowest modulation factor pair of specified criteria should
Pilot tone, be that its first sending port distributes the pilot tone, remaining sending port is sequentially allocated in order, if currently distribute radical exponent
Pilot number is not enough or does not meet the modulation factor of specified criteria, then select the corresponding pilot tone of next radical exponent to carry out successively point
Match somebody with somebody, after being assigned, update the user's set for distributing pilot tone；Repeat this step until scheduling is completed.
In each user's moving process, with the change of channel statistic between base station and each user, dynamically implement institute
State pilot tone scheduling process.
A kind of extensive mimo system multi-user ascending pilot frequency design in broadband and channel information acquisition device, including base station side
Device and user-side device；
The base station side device, including：
Pilot frequency sequence generation module, for generating multiple Zadoff-Chu sequences according to different radical exponents, and will generate
Zadoff-Chu sequence be modulated through the different modulating factor, generate modulation after sequence；
Ascending pilot frequency pond, after preserving the Zadoff-Chu sequence of the pilot frequency sequence generation module generation and modulating
Sequence；
Ascending pilot frequency scheduler module, for being that each sending port of each user chooses ascending pilot frequency from the ascending pilot frequency pond
Signal；
Pilot tone selection result sending module：For the selection result obtained by ascending pilot frequency scheduler module is sent out to each user
Send；
And uplink channel estimation module, for implementing channel information acquisition according to the pilot signal for receiving；
The user-side device, including：
Uplink pilot sequence generation module, for generating according to the pilot tone selection result information that sends from base station for receiving
Uplink pilot sequence；
And ascending pilot frequency sending module, for sending the ascending pilot frequency generated by the uplink pilot signal generation module
Sequence.
A kind of extensive mimo system multiuser downstream pilot design in broadband and channel information acquisition method, including：To be many
The individual Zadoff-Chu sequence generated by the different radical exponents and its Sequence composition after different modulating factor modulations is descending leads
Frequency pond；It is that each wave beam chooses down-bound pilot frequency signal from descending pilot frequency pond that pilot tone scheduling is implemented in base station, and selection result is sent
Give each user；In down channel training, base station sends downlink wave beam domain pilot signal, and user is according to the pilot signal reality for receiving
Apply channel information acquisition.
The extensive mimo system in the broadband adopts the OFDM with Cyclic Prefix (OFDM) modulation system, under
In row channel training, base station sends downlink wave beam domain pilot tone on multiple subcarriers of one or more continuous OFDM symbols simultaneously
Signal, user are implemented down channel according to the downlink pilot signal for receiving and are estimated.
The radical exponent of Zadoff-Chu sequence is generated in coprime with sequence length and less than sequence length all positive integers
Middle selection.
It is that the criterion of the down-bound pilot frequency signal that each wave beam is chosen is from descending pilot frequency pond：The pilot tone used on different beams
Signal can be with non-orthogonal；Different beams can use the Zadoff-Chu sequence generated by identical or different radical exponents through toning
Sequence produced by after system, when different beams are produced after ovennodulation using the Zadoff-Chu sequence generated by same radical exponent
Raw sequence, the modulation factor of sequence used by which are differed.
Implement pilot tone scheduling, and the radical exponent collection of the descending pilot frequency sequence used by each wave beam using following steps in base station
Close and modulation factor set, or both coding, each user is sent to by downlink：
For the pilot frequency sequence that first beam allocation the first radical exponent modulated factor is 0；
For the wave beam of unallocated pilot tone, if current radical exponent modulated sequence has had not been used, by current radical exponent
Under a sequence after unassigned modulation distribute to the wave beam；If current radical exponent modulated sequence is using complete,
Choose the sequence that the next radical exponent modulated factor is 0 and distribute to the wave beam；Repeat the step until all wave beams divide
Match somebody with somebody corresponding pilot frequency sequence.
In each user's moving process, with the change of the characteristic of channel between base station and each user, dynamically lead described in enforcement
Frequency scheduling process.
In down channel training, user using the pilot signal that receives implement the algorithm that down channel estimates include but
It is not limited to the channel estimation method based on compressed sensing.
A kind of extensive mimo system multiuser downstream pilot design in broadband and channel information acquisition device, including base station side
Device and user-side device；
The base station side device, including：
Pilot frequency sequence generation module, for generating multiple Zadoff-Chu sequences according to different radical exponents, and will generate
Zadoff-Chu sequence be modulated through the different modulating factor, generate modulation after sequence；
Descending pilot frequency pond, after preserving the Zadoff-Chu sequence of the pilot frequency sequence generation module generation and modulating
Sequence；
Descending pilot frequency scheduler module, for being that each wave beam chooses down-bound pilot frequency signal from the ascending pilot frequency pond；
Pilot tone selection result sending module：For the selection result obtained by descending pilot frequency scheduler module is sent out to each user
Send；
And descending pilot frequency sending module, under sending for the wave beam pilot tone allocation result according to descending pilot frequency scheduler module
Row Beam Domain pilot signal；
The user-side device, including：
Descending pilot frequency matrix generation module, for selecting knot according to each downlink pilot tone that sends from base station for receiving
Fruit information generates descending pilot frequency matrix；
And down channel estimation module, implement channel information for the pilot signal according to descending pilot frequency matrix and reception
Obtain.
Beneficial effect：The extensive mimo system of the broadband multiuser based on Zadoff-Chu sequence that the present invention is provided is up
With basic characteristics of the descending pilot frequency design with channel estimation methods it is, based on the multiple Zadoff-Chu generated by different radical exponents
Sequence and its generate after different modulating factor modulations sequence construct is up and descending pilot frequency pond.Up each user respectively sends
Port (antenna opening or wave beam mouth) frequency domain pilot signal is chosen in ascending pilot frequency pond by base station side, and the pilot frequency sequence of selection meets
Following design criteria：The radical exponent of the pilot frequency sequence that the user in different districts uses is different；In same cell, two differences are sent out
The radical exponent of the pilot frequency sequence that sending end mouth (antenna or wave beam) is used is identical or different, and when radical exponent is identical, which is corresponding to lead
The modulation factor of frequency sequence is different.Base station side refers to the root that can be used to generate the community user pilot tone according to channel statistical information
Number, implements ascending pilot frequency scheduling of resource.In up channel training, different user is more one or more continuous OFDM symbols
Uplink pilot signal is sent on individual subcarrier simultaneously, and base station side obtains the channel estimation value of each user accordingly.Move in each user
During, dynamically implement ascending pilot frequency scheduling with the change of channel statistical property when long.In down channel training, base station is sent out
Send pilot tone to user, user is according to the pilot signal estimating channel information for receiving.Down-bound pilot frequency signal is in Beam Domain (by wave beam
One group of wave beam transmitting-receiving port that shaping is generated) send, and chosen in descending pilot frequency pond by base station side, the pilot frequency sequence of selection is full
The following design criteria of foot：Pilot signal on different beams is not required to meet orthogonality condition；Different beams are used by multiple differences
Zadoff-Chu sequence and its sequence produced by after the modulation of the different modulating factor that radical exponent is generated.The present invention can
The pilot-frequency expense of reduction system, improves the spectrum efficiency and power efficiency of wireless communication system.Compared with prior art, the present invention
Have the advantage that：
1st, extensive mimo system can be greatly reduced using based on the pilot tone pond constructed by multiple Zadoff-Chu sequences
Pilot-frequency expense, and then the spectrum efficiency and power efficiency of lift system.
2nd, using the good auto-correlation of Zadoff-Chu sequence and cross correlation, the accuracy of channel estimation is improved.
3rd, according to the statistic channel information of each user, adaptive scheduling is carried out to pilot resources, is reducing pilot-frequency expense
Meanwhile, ensure channel estimating performance, and the motility of lift system.
4th, the pilot matrix in this method is the definitiveness matrix constructed using Zadoff-Chu sequence, with compressed sensing skill
The random pilot matrix that commonly uses in art is compared, and is more applicable for real system.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to embodiment or description of the prior art
Needed for accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description only show the present invention one
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to these
Accompanying drawing obtains the accompanying drawing of other embodiment.
Fig. 1 is designed for ascending pilot frequency and channel information acquisition method flow chart.
Fig. 2 is designed for ascending pilot frequency and channel information acquisition apparatus structure block diagram.
Fig. 3 is designed for descending pilot frequency and channel information acquisition method flow chart.
Fig. 4 is designed for descending pilot frequency and channel information acquisition apparatus structure block diagram.
Fig. 5 is the extensive mimo system schematic diagram of single cell.
Fig. 6 is ascending pilot frequency pond product process schematic diagram.
Fig. 7 is each user uplink pilot frequency product process schematic diagram.
Fig. 8 is descending pilot frequency pond product process schematic diagram.
Fig. 9 is each user's descending pilot frequency product process schematic diagram.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention in
Accompanying drawing, to the embodiment of the present invention in technical scheme carry out clear, complete description, it is clear that described embodiment is only this
Invent a part of embodiment, rather than whole embodiments.Embodiment in based on the present invention, those of ordinary skill in the art exist
The every other embodiment obtained under the premise of not making creative work, should all belong to the scope of protection of the invention.
As shown in figure 1, a kind of extensive mimo system multi-user ascending pilot frequency design in broadband disclosed in the embodiment of the present invention
And channel information acquisition method, mainly include：(1) by multiple Zadoff-Chu sequences generated by different radical exponents and its process
Sequence composition ascending pilot frequency pond after different modulating factor modulations；(2) it is each from ascending pilot frequency pond that pilot tone scheduling is implemented in base station
The each sending port of user chooses uplink pilot signal, and selection result is sent to each user；(3) in up channel training,
User sends uplink pilot signal, and channel information acquisition is implemented according to the pilot signal for receiving in base station.
Communication system adopts the OFDM with Cyclic Prefix (OFDM) modulation system, base station to provide in identical time-frequency
Radio communication is carried out simultaneously with multiple users on source；Channel information acquisition is implemented by pilot signal in communication process.Up
In channel training, in cell, each user sends ascending pilot frequency on multiple subcarriers of one or more continuous OFDM symbols simultaneously
Signal, base station carry out the uplink channel estimation of each user in cell according to the pilot signal for receiving.
Up frequency domain pilot signal is chosen in ascending pilot frequency pond by base station side, and the pilot frequency sequence of selection meets following design
Criterion：The radical exponent of the pilot frequency sequence that the user in different districts uses is different；In same cell, two different sending ports
The radical exponent of the pilot frequency sequence that (antenna or wave beam) is used is identical or different, when radical exponent is identical, its corresponding pilot frequency sequence
Modulation factor different.
As shown in Fig. 2 a kind of extensive mimo system multi-user ascending pilot frequency design in broadband disclosed in the embodiment of the present invention
And the device of channel information acquisition, including base station side device and user-side device；Wherein base station side device, including：Pilot frequency sequence
Generation module, for generating multiple Zadoff-Chu sequences, and the Zadoff-Chu sequence that will be generated according to different radical exponents
It is modulated through the different modulating factor, generates the sequence after modulation；Ascending pilot frequency pond, for preserving pilot frequency sequence generation module
Sequence after the Zadoff-Chu sequence of generation and modulation；Ascending pilot frequency scheduler module, for being from the ascending pilot frequency pond
The each sending port of each user chooses uplink pilot signal；Pilot tone selection result sending module, for by ascending pilot frequency scheduler module
Obtained selection result is sent to each user；And uplink channel estimation module, for implementing according to the pilot signal for receiving
Channel information acquisition.User-side device, including：Uplink pilot sequence generation module, for sending from base station according to received
Pilot tone selection result information generate uplink pilot sequence；And ascending pilot frequency sending module, believed by ascending pilot frequency for sending
The uplink pilot sequence that number generation module is generated.
As shown in figure 3, a kind of extensive mimo system multiuser downstream pilot design in broadband disclosed in the embodiment of the present invention
And channel information acquisition method, including：(1) by multiple Zadoff-Chu sequences generated by different radical exponents and its through different
Sequence composition descending pilot frequency pond after modulation factor modulation；(2) it is each wave beam from descending pilot frequency pond that pilot tone scheduling is implemented in base station
Down-bound pilot frequency signal is chosen, and selection result is sent to each user；(3) in down channel training, base station sends down going wave
Beam domain pilot signal, user implement channel information acquisition according to the pilot signal for receiving.
In down channel training, under base station is sent on multiple subcarriers of one or more continuous OFDM symbols simultaneously
Row Beam Domain pilot signal, user are implemented down channel according to the downlink pilot signal for receiving and are estimated.Descending pilot frequency is believed
Number Beam Domain send, from descending pilot frequency pond choose pilot frequency sequence meet following design criteria：Used on different beams leads
Frequency signal can be with non-orthogonal；Different beams can be used and be passed through by the Zadoff-Chu sequence that identical or different radical exponents are generated
Sequence produced by after modulation, when different beams use the Zadoff-Chu sequence generated by same radical exponent institute after ovennodulation
The sequence of generation, the modulation factor of sequence used by which are differed.
As shown in figure 4, a kind of extensive mimo system multiuser downstream pilot design in broadband disclosed in the embodiment of the present invention
And channel information acquisition device, including base station side device and user-side device；Wherein, base station side device, including：Pilot frequency sequence is given birth to
Into module, for generating multiple Zadoff-Chu sequences according to different radical exponents, and the Zadoff-Chu sequence for generating is passed through
Cross the different modulating factor to be modulated, generate the sequence after modulation；Descending pilot frequency pond, for preserving the life of pilot frequency sequence generation module
Into Zadoff-Chu sequence and modulation after sequence；Descending pilot frequency scheduler module, for being each from the ascending pilot frequency pond
Wave beam chooses down-bound pilot frequency signal；Pilot tone selection result sending module, for by the selection obtained by descending pilot frequency scheduler module
As a result send to each user；And descending pilot frequency sending module, distribute for the wave beam pilot tone according to descending pilot frequency scheduler module
As a result downlink wave beam domain pilot signal is sent.User-side device, including：Descending pilot frequency matrix generation module, for according to reception
To each downlink pilot tone selection result information that sends from base station generate descending pilot frequency matrix；And down channel estimates mould
Block, implements channel information acquisition for the pilot signal according to descending pilot frequency matrix and reception.
The inventive method is primarily adapted for use in base station side and is equipped with large-scale antenna array with while servicing the big rule of multiple users
Mould MIMO-OFDM systems.With reference to specific communication system example to uplink and downlink pilot design according to the present invention and
The process that implements of channel information acquisition method elaborates, it should be noted that the inventive method be applicable not only to following
The concrete system model lifted by example, is applied equally to the system model of other configurations.
First, system configuration
In this embodiment, it is considered to which extensive MIMO-OFDM systems, base station side configuration include the above antenna element of dozens of
Large-scale antenna array, large-scale antenna array can adopt multiple array structures such as linear array, circular array or plate array it
One.Assume that the antenna element number that base station side is equipped with is NBS, each antenna element can adopt omnidirectional antenna or fan antenna, when each
When antenna element adopts omnidirectional antenna, 120 degree of fan antennas and 60 degree of fan antennas, the spacing between each antenna element can configure
For 1/2 wavelength,Wavelength and 1 wavelength.Each antenna element can adopt single polarization or multi-polarization antenna.Fig. 5 is big for single cell
Scale mimo system schematic diagram, it is assumed that there is the user of many antennas of K outfit in cell, each user is equipped with NUTRoot antenna.
Using the OFDM with Cyclic Prefix (OFDM) modulation-transmission technology, subcarrier number is N, using N thereincHeight
Carrier wave sends frequency-domain pilot sequence, claims this NcIndividual subcarrier is effective subcarrier, and circulating prefix-length is Ng.
2nd, ascending pilot frequency design and channel information acquisition
1st, upward signal model
Below using user terminal antenna as the upward signal model of sending port.With user terminal wave beam as sending port
Situation similar.By taking single cell scenario as an example, orderRepresent k-th user's t root on n-th effective subcarrier
Antenna and the N of base stationBSUplink channel frequency between root antenna is responded, then the channel frequency of k-th user's t root antenna
Response is represented by
OrderRepresent the pilot tone vector x of k-th user's t roots antenna transmissionk,tThe matrix for being constituted,
Xk,tThe vector constituted by diagonal element is pilot tone vector xk,t, i.e.,：Xk,t=diag { xk,t, then base station receives
OFDM frequency-region signals can be expressed as
Wherein,The reception signal of base station is represented,Additive white Gaussian noise matrix is represented,
The average of its each element is zero, and variance is σz.
OrderRepresentation space-frequency domain matrixAuto-correlation
Battle array.When number of antennas is larger,Eigenmatrix tend to same matrix Uul(the tenth of the twelve Earthly Branches of the characteristic vector composition of autocorrelation matrix
Matrix), and can approximate representation be：
WhereinIt is the unitary matrice depending on base station side antenna configurations mode,Represent NcThe dimension tenth of the twelve Earthly Branches
DFT matrixesFront NgRow.
If space-frequency domain channel matrixWave beam-time delay domain channel response matrix beThen space-frequency domain
The relation of channel response matrix and wave beam-time delay domain channel response matrix can be expressed as follows：
The computing formula of wherein wave beam-time delay domain channel response matrix is as follows：
Represented using wave beam-time delay domain channel, then the reception signal that (1) formula is given can be expressed as：
2nd, ascending pilot frequency design
For reducing the pilot-frequency expense of extensive mimo wireless communication system, using with good auto-correlation and cross correlation
Zadoff-Chu sequence construction ascending pilot frequency pond.Corresponding Zadoff-Chu sequence can be generated by sequence length and radical exponent,
Wherein radical exponent is selected in and all integers less than sequence length coprime with sequence length.For given sequence length,
The sequence jointly constructs that the Zadoff-Chu sequence that different radical exponents are generated is generated after ovennodulation go out ascending pilot frequency pond.Up lead
Frequency pond product process schematic diagram is as shown in fig. 6, specific configuration flow process is as follows：
(1) according to sequence length NcDetermine the radical exponent set that can be used to generating Zadoff-Chu sequenceWherein riIt is less than NcAnd and NcRelatively prime positive integer, numbers of the L for radical exponent, can be by Europe
Formula is drawn to obtain.Hypothesis sequence length is prime number, then can serve as radical exponent next life less than all positive integers of sequence length
Into Zadoff-Chu sequence.The spendable radical exponent r of each celliConcrete value setBig I according to can in cell
With user terminal sending port (antenna or wave beam) the sum N for supportingportN is determined with the length of Cyclic Prefixg, such as Nport/Ng.
(2) each radical exponent r produced using previous stepi, produce Zadoff-Chu sequence vector according to the following formulaN-th
Individual element：
Wherein,(·)2Represent to 2 remainders.
(3) rightIt is modulated, produces sequenceWhereinForτ row,For modulation factor, ⊙ is represented by element product.The concrete value set of τBefore can be according to circulation
Sew length NgDetermine, such as
(4) sequence produced after will be modulated for Zadoff-Chu sequence in previous step is put into pilot tone pond, thus sets up up
Pilot tone pond, when wherein τ values are 0, corresponding sequence can regard non-modulated former sequence as.
N of each user in an OFDM symbol in cellCUplink pilot signal, up frequency domain are sent on individual subcarrier simultaneously
Pilot signal is chosen in ascending pilot frequency pond by base station side, and the pilot frequency sequence of selection meets following design criteria：In different districts
The radical exponent of pilot frequency sequence that uses of user different；In same cell, two different sending ports (antenna or wave beam) use
Pilot frequency sequence radical exponent identical or different, when radical exponent is identical, the modulation factor of its corresponding pilot frequency sequence is different.
Base station side ascending pilot frequency is dispatched the radical exponent of each self-generating uplink pilot sequence of each user of gained and displacement because
Son, or its coding, are sent to each user by downlink.Root of each user according to the generation uplink pilot sequence for receiving
Index and translocation factor generate respective uplink pilot sequence.Each user uplink pilot frequency product process schematic diagram is as shown in Figure 7.
3rd, uplink channel estimation
In up channel training, N of each user in an OFDM symbol in cellCSent on individual subcarrier simultaneously up
Pilot signal.Each user in cell is realized using the statistical information of the uplink pilot signal and each subscriber channel for receiving in base station
Channel estimation.The statistical information of wherein each subscriber channel can be obtained by the uplink detection of each user in base station side, different
The detectable signal of user does not require the use of orthogonal resource.Below using user terminal antenna as the up channel of sending port
Estimate.Situation with user terminal wave beam as sending port is similar.
Make rk,tAnd τk,tK-th user t root antenna used by pilot tone corresponding radical exponent and modulation factor is represented respectively, then
The frequency domain pilot signal matrix of the antenna is
Wherein, σtrUplink pilot signal power is represented,Then have
The pilot signal that base station receives is represented by：
Base station carries out channel estimation according to the pilot signal for receiving, and obtains estimated value and its mean square error of each subscriber channel
Difference.Using the decorrelation characteristic between wave beam-time delay domain channel each element, base station side can realize the linear minimum of low complex degree
The extensive MIMO-OFDM channel parameter estimations of mean square error.
For k-th user's t root antenna, the least-squares estimation value of its wave beam-time delay domain channel parameter is obtained first
For
Wherein,ρ=σtr/σzFor signal to noise ratio,Middle each element is only
Vertical and obedienceDistribution.
According to the wave beam-time delay domain Two-dimensional Statistical channel information of extensive MIMO-OFDM channels, can obtain its wave beam-when
Prolong the Linear Minimum Mean-Square Error Estimation of domain channel parameter.As extensive MIMO-OFDM channels assume solution in wave beam-time delay domain
Correlation properties, can be rightEach element carry out Linear Minimum Mean-Square Error Estimation respectively, so as to reduce implementation complexity,
The estimator of its i-th row jth column element is：
Wherein,
Ωk,tFor wave beam-time delay domain Two-dimensional Statistical channel information, can be obtained by the uplink detection of each user in base station side.
The orthogonality that is estimated by MMSE, can obtain estimation difference is
The estimated value that space-frequency domain channel matrix is obtained by (3) formula
4th, ascending pilot frequency scheduling
Ascending pilot frequency dispatches statistic channel information and corresponding of the base station place cell in base station side according to each user
Index set is completed.Base station according to a certain given criterion, such as channel estimation mean square error sum minimum criteria, to cell in use
In family and pilot tone pond, patterns available resource is scheduled, and determines corresponding of the Zadoff-Chu sequence that each antenna of each user is used
Each user in index and modulation factor, and notifying cell.Adjusted using user terminal antenna as the ascending pilot frequency of sending port below
Degree.Situation with user terminal wave beam as sending port is similar.
If there is K scheduled user in cell, pilot sequence length is Nc, withRepresent and adjusted
Degree user's set,Represent the radical exponent set that can be used to generate the community user pilot frequency sequence.Two different antennaes are used
The radical exponent of pilot frequency sequence can be with identical, when radical exponent is identical, and the modulation factor of its corresponding pilot frequency sequence is different.Same use
The different antennae at family preferentially distributes radical exponent identical pilot frequency sequence, after the corresponding pilot frequency sequence of the radical exponent is distributed,
The pilot frequency sequence that then can be generated using other radical exponents；In the present embodiment, the pilot tone sequence of any two different antennae of same user
If the radical exponent of row is identical, the difference of the modulation factor of two sequences is set to the numerical value of N not less than frequency band protection intervalg.
Make rk,tAnd τk,tPilot frequency sequence that k-th user t root antenna used corresponding radical exponent and modulation factor are represented respectively,Pilot tone allocation model is represented, whereinWithRespectively distribute to the radical exponent set and modulation of the pilot frequency sequence of each antenna of k-th user because
Subclass, is thus obtained corresponding frequency domain pilot signal.
Uplink channel estimation mean square error sum is
Pilot tone based on channel estimation mean square error sum minimum criteria is dispatched：Search out so that εulMinimum pilot tone
Allocative decisionPilot tone scheduling can be completed by exhaustive search or greedy algorithm, and this sentences coloring algorithm and is
Example, provides the process for how realizing pilot resources scheduling.
Define user k and user k' between channel registration be：
Define user k and user k' between degree of disturbance be：
Make α represent the threshold value of degree of disturbance between two users, be then described as follows based on the pilot tone dispatching algorithm of coloring algorithm：
Step 1：Initialising subscriber set：User gathersUser's set of pilot tone is distributed
Step 2：Initialization pilot tone distribution：The user u in all users selecting channel registration sum maximum, i.e.,
It is r to distribute radical exponent for which1, modulation factor be 0, Ng,2Ng,...,(NUT-1)NgPilot tone, these pilot tones are successively
Distribute to the N of the userUTRoot antenna.When the pilot tone under the radical exponent is assigned, then select leading for next radical exponent generation
Frequently, and modulation factor again from 0 start with NgIncrements, until the pilot frequency sequence of all antennas of the user is distributed
Into.Update the user's set for having distributed pilot tone：
Step 3：User selects：In the user of all unallocated pilot tones, select and the channel weight for distributing pilot tone user
The maximum user of right sum, i.e.,
If such user's more than one, select wherein with the channel registration of all unallocated pilot tone users it
With maximum user.I.e.
Step 4：Pilot tone is distributed：For the user u distribution pilot tones that selects in step 3.If the current radical exponent modulated factor
For 0～Ng- 1 pilot tone is also unassigned to be finished, then find a lowest modulation factor in these modulation factors and meet following
Part
First antenna that the modulation factor is distributed to the user, and the corresponding modulation factor of remaining antenna is with NgBetween
Every incremented by successively, if patterns available lazy weight in increasing process, the next radical exponent of consideration, and corresponding modulation factor weight
Newly start from 0 with NgIncrements, be sequentially allocated to each antenna；If being assigned or cannot having found the tune for meeting the condition
Factor values processed, then consider next radical exponent, and corresponding modulation factor starts from 0 with NgIncrements, be sequentially allocated to
The N of the userUTRoot antenna.
Step 5：IfReturn to step 3 is circulated；Otherwise terminate scheduling.
In each user's moving process, between base station and each user channel long when statistical property change, base station side
Dynamically implement aforementioned pilot tone scheduling, form the pilot tone distribution after updating, and then implement aforesaid channel estimation methods.Unite when long
The change of meter characteristic is relevant with specific application scenarios, and its typical statistic time window is several times of transmission time window or tens of in short-term
Times, the acquisition of related channel statistical information is also carried out on larger time width.
3rd, descending pilot frequency design and channel information acquisition
1st, downstream signal model
The single cell scenario of consideration, withThe pilot tone that i-th of base station sending port (wave beam) sends is represented in frequency domain
Sequence,Represent between i-th of base station sending port and k-th user j-th receiving port (antenna or wave beam)
Channel frequency response.Then downlink frequency domain signal is expressed as：
WhereinThe pilot signal that k-th user, j-th receiving port is received is represented, Additive white Gaussian noise is represented, the average of its each element is zero, and variance isOrderThen above formula
Can be expressed as follows：
WhereinFor the channel response matrix between j-th receiving port of base station end sending port and k-th user, P
For Beam Domain pilot matrix,For matrixVector representation.
2nd, descending pilot frequency design
In order to reduce the pilot-frequency expense of extensive mimo system channel estimation, descending leading is built using Zadoff-Chu sequence
Frequency pond.Corresponding Zadoff-Chu sequence can be generated by sequence length and radical exponent, wherein radical exponent can with sequence length
Select in coprime and all integers less than sequence length.For given sequence length, the corresponding Zadoff- of different radical exponents
The all sequences jointly constructs that Chu sequences are generated after ovennodulation go out descending pilot frequency pond.Down-bound pilot frequency signal is sent in Beam Domain,
The pilot frequency sequence of selection meets following design criteria：The pilot signal used on different beams can be with non-orthogonal；Different beams can
With the sequence for using the Zadoff-Chu sequence generated by identical or different radical exponents produced after ovennodulation, when different ripples
Beam is using the produced sequence after ovennodulation of the Zadoff-Chu sequence generated by same radical exponent, the modulation of sequence used by which
The factor is differed.
Descending pilot frequency pond product process schematic diagram is as shown in figure 8, specific configuration flow process is as follows：
(1) according to sequence length NcDetermine the radical exponent set that can be used to generating Zadoff-Chu sequenceWherein riIt is less than NcAnd and NcRelatively prime positive integer, numbers of the L for radical exponent, can be by Europe
Formula is drawn to obtain.Hypothesis sequence length is prime number, then can serve as radical exponent next life less than all positive integers of sequence length
Into Zadoff-Chu sequence.The spendable radical exponent r of each celliConcrete value setBig I according to base station send
Port (wave beam) sum NportN is determined with the length of Cyclic Prefixg, such as Nport/Ng.
(2) each radical exponent r produced using previous stepi, produce Zadoff-Chu sequence vector according to the following formulaN-th
Individual element：
Wherein,(·)2Represent to 2 remainders.
(3) rightIt is modulated, produces sequenceWhereinForφ row,For modulation factor, ⊙ is represented by element product.The concrete value set of φBefore can be according to circulation
Sew length NgDetermine, such as
(4) sequence produced after will be modulated for Zadoff-Chu sequence in previous step is put into pilot tone pond, thus sets up descending
Pilot tone pond, when wherein φ values are 0, corresponding sequence can regard non-modulated former sequence as.
Down-bound pilot frequency signal is sent in Beam Domain, and base station side chooses pilot tone distribution as follows in descending pilot frequency pond
Give each wave beam：
Step 1：Initialization pilot tone distribution, is that wave beam 1 distributes radical exponent for r1, the pilot frequency sequence that modulation factor is 0.
Step 2：For the wave beam i of unallocated pilot tone, if current radical exponent modulated sequence has had not been used, will be current
A sequence under radical exponent after unassigned modulation distributes to wave beam i；If current radical exponent modulated sequence has been used
Complete, then choose the sequence that the next radical exponent modulated factor is 0 and distribute to wave beam i.
Step 3：Repeat step 2, until all wave beams have distributed corresponding pilot frequency sequence.
Beam Domain pilot matrix P can be obtained by above-mentioned steps.
Base station side is by the radical exponent set and modulation factor set of used for each wave beam descending pilot frequency sequence, or which encodes,
Each user is sent to by downlink.Radical exponent of each user according to the used descending pilot frequency sequence of each wave beam for receiving
Set and modulation factor set generate descending pilot frequency matrix.Each user's descending pilot frequency matrix product process schematic diagram is as shown in Figure 9.
3rd, down channel is estimated
In down channel training, user implements channel estimation according to the downlink pilot signal for receiving.Here reality
Apply in example, user implements down channel estimation using the algorithm that follows the trail of based on subspace.
The pilot signal that user side is received can be expressed as：
Signal will be receivedBeam Domain pilot matrixAnd Beam Domain channel degree of rarefication s
As the input of the recovery algorithms that is followed the trail of based on subspace, Beam Domain channel matrix is estimated.
The recovery algorithms concrete steps that is followed the trail of based on subspace are expressed as follows：
Step 1：Input user side receives pilot dataBeam Domain pilot matrix P, Beam Domain channel's
Degree of rarefication s, receiving terminal signal-to-noise ratio (SNR) estimation value SNR, the threshold value of dependency between the remaining column vector for receiving signal and pilot matrix
η；
Step 2：Initialization：J=0,
Step 3：Degree of rarefication is pruned；If signal to noise ratio snr is more than threshold value, reduce degree of rarefication；Conversely, then increasing sparse
Degree；
Step 4：If conditionIt is unsatisfactory for, then execution step 5；Otherwise, following process is executed：
4.1j=j+1
4.2
4.3
4.4
4.5
If 4.6 | | rk,j| | 2 ＞ | | rk,j-1||2
Ωk,j=Ωk,j-1, exit circulation, execution step 5；
4.7 continue executing with step 4；
Step 5：OrderBeamformer output domain channel estimation results are：
In Ωk,jThere is nonzero term at placeElement value at other positions is zero, i.e.,
In embodiment provided herein, it should be understood that disclosed method, the essence of the application is being not above
In god and scope, can realize in other way.Current embodiment is a kind of exemplary example, should not be taken as
Limit, given particular content should in no way limit the purpose of the application.For example, multiple units or component can in conjunction with or can
To be integrated into another system, or some features can be ignored, or not execute.
The above, the only specific embodiment of the present 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 should be defined by the scope of the claims.
Claims (16)
1. a kind of extensive mimo system multi-user ascending pilot frequency in broadband is designed and channel information acquisition method, it is characterised in that：
Including：By multiple Zadoff-Chu sequences generated by different radical exponents and its sequence structure after different modulating factor modulations
Into ascending pilot frequency pond；It is that each sending port of each user chooses ascending pilot frequency letter from ascending pilot frequency pond that pilot tone scheduling is implemented in base station
Number, and selection result is sent to each user；In up channel training, user sends uplink pilot signal, and base station foundation connects
The pilot signal of receipts implements channel information acquisition.
2. a kind of extensive mimo system multi-user ascending pilot frequency design in broadband according to claim 1 and channel information are obtained
Take method, it is characterised in that：The extensive mimo system in the broadband adopts the OFDM with Cyclic Prefix（OFDM）Adjust
Mode processed, in up channel training, in cell, each user is same on multiple subcarriers of one or more continuous OFDM symbols
When send uplink pilot signal, base station is estimated according to the uplink channel that the pilot signal that receives carries out each user in cell
Meter.
3. a kind of extensive mimo system multi-user ascending pilot frequency design in broadband according to claim 1 and channel information are obtained
Take method, it is characterised in that：The radical exponent of Zadoff-Chu sequence is generated coprime with sequence length and less than sequence length
Select in all positive integers.
4. a kind of extensive mimo system multi-user ascending pilot frequency design in broadband according to claim 1 and channel information are obtained
Take method, it is characterised in that：It is that the criterion that each sending port of each user chooses uplink pilot signal is from ascending pilot frequency pond：No
The radical exponent of the pilot frequency sequence that the user in cell uses is different；In same cell, two different sending ports using lead
The radical exponent of frequency sequence is identical or different, and when radical exponent is identical, the modulation factor of its corresponding pilot frequency sequence is different.
5. a kind of extensive mimo system multi-user ascending pilot frequency design in broadband according to claim 1 and channel information are obtained
Take method, it is characterised in that：Base station is up according to the radical exponent enforcement that channel statistical information and each cell can be used to generate pilot tone
Pilot resources are dispatched, and adoptable pilot tone dispatching algorithm includes but is not limited to exhaustive search and greedy algorithm；Ascending pilot frequency is dispatched
After the completion of, base station by the radical exponent and modulation factor of each user uplink pilot frequency sequence, or both coding, sent out by downlink
Give each user.
6. a kind of extensive mimo system multi-user ascending pilot frequency design in broadband according to claim 5 and channel information are obtained
Take method, it is characterised in that：Using coloring algorithm, base station realizes that pilot resources are dispatched according to given criterion, the given criterion bag
Include but be not limited to channel estimation mean square error sum minimum（MMSE）Criterion；Step under MMSE criterions includes：
Initialising subscriber set and distributed pilot tone user set；
The user in all users selecting channel registration sum maximum, is that each of which sending port is sequentially allocated first finger
The corresponding pilot tone of the several lower different modulating factors, if the corresponding pilot tone of the first radical exponent not enough, selects next radical exponent corresponding
Pilot tone, updates the user's set for having distributed pilot tone after being assigned；
In the user of all unallocated pilot tones, the user maximum with the channel registration sum for distributing pilot tone user is selected,
If such user's more than one, the use maximum with the channel registration sum of all unallocated pilot tone users is selected wherein
Family, finds out in unappropriated modulation factor under currently distribution radical exponent and meets the lowest modulation factor of specified criteria and corresponding lead
Frequently, it is that its first sending port distributes the pilot tone, remaining sending port is sequentially allocated in order, if currently distribution radical exponent pilot tone
Lazy weight does not meet the modulation factor of specified criteria, then select the corresponding pilot tone of next radical exponent to be allocated successively,
The user's set for having distributed pilot tone is updated after being assigned；Repeat this step until scheduling is completed.
7. a kind of extensive mimo system multi-user ascending pilot frequency design in broadband according to claim 1 and channel information are obtained
Take method, it is characterised in that：In each user's moving process, with the change of channel statistic between base station and each user, move
Implement the pilot tone scheduling process in state ground.
8. a kind of extensive mimo system multi-user ascending pilot frequency design in broadband using as described in any one of claim 1-7 and
The device of channel information acquisition method, it is characterised in that：Including base station side device and user-side device；
The base station side device, including：
Pilot frequency sequence generation module, for generating multiple Zadoff-Chu sequences according to different radical exponents, and will generate
Zadoff-Chu sequence is modulated through the different modulating factor, generates the sequence after modulation；
Ascending pilot frequency pond, for the sequence after preserving the Zadoff-Chu sequence of the pilot frequency sequence generation module generation and modulating
Row；
Ascending pilot frequency scheduler module, for being that each sending port of each user chooses ascending pilot frequency letter from the ascending pilot frequency pond
Number；
Pilot tone selection result sending module：For the selection result obtained by ascending pilot frequency scheduler module is sent to each user；
And uplink channel estimation module, for implementing channel information acquisition according to the pilot signal for receiving；
The user-side device, including：
Uplink pilot sequence generation module, up for generating according to the pilot tone selection result information that sends from base station for receiving
Pilot frequency sequence；
And ascending pilot frequency sending module, for sending the ascending pilot frequency sequence generated by the uplink pilot signal generation module
Row.
9. a kind of extensive mimo system multiuser downstream pilot design in broadband and channel information acquisition method, it is characterised in that：
Including：By multiple Zadoff-Chu sequences generated by different radical exponents and its sequence structure after different modulating factor modulations
Into descending pilot frequency pond；It is that each wave beam chooses down-bound pilot frequency signal from descending pilot frequency pond that pilot tone scheduling is implemented in base station, and will select
As a result each user is sent to；In down channel training, base station sends downlink wave beam domain pilot signal, and user is according to leading for receiving
Frequency signal implements channel information acquisition.
10. a kind of extensive mimo system multiuser downstream pilot design in broadband according to claim 9 and channel information
Acquisition methods, it is characterised in that：The extensive mimo system in the broadband adopts the OFDM with Cyclic Prefix（OFDM）
Modulation system, in down channel training, base station is sent on multiple subcarriers of one or more continuous OFDM symbols simultaneously
Downlink wave beam domain pilot signal, user are implemented down channel according to the downlink pilot signal for receiving and are estimated.
A kind of extensive mimo system multiuser downstream pilot design in 11. broadbands according to claim 9 and channel information
Acquisition methods, it is characterised in that：Generate Zadoff-Chu sequence radical exponent coprime with sequence length and be less than sequence length
All positive integers in select.
A kind of extensive mimo system multiuser downstream pilot design in 12. broadbands according to claim 9 and channel information
Acquisition methods, it is characterised in that：It is that the criterion of the down-bound pilot frequency signal that each wave beam is chosen is from descending pilot frequency pond：Different beams
On the pilot signal that uses can be with non-orthogonal；Different beams can use the Zadoff- generated by identical or different radical exponents
Sequence of the Chu sequences produced by after ovennodulation, when different beams are using the Zadoff-Chu sequence generated by same radical exponent
Sequence produced by after ovennodulation, the modulation factor of sequence used by which are differed.
A kind of extensive mimo system multiuser downstream pilot design in 13. broadbands according to claim 12 and channel information
Acquisition methods, it is characterised in that：Implement pilot tone scheduling, and the descending pilot frequency sequence used by each wave beam using following steps in base station
The radical exponent set and modulation factor set of row, or both coding, each user is sent to by downlink：
For the pilot frequency sequence that first beam allocation the first radical exponent modulated factor is 0；
For the wave beam of unallocated pilot tone, if current radical exponent modulated sequence has had not been used, by under current radical exponent not
A sequence after allocated modulation distributes to the wave beam；If current radical exponent modulated sequence is chosen using complete
The next radical exponent modulated factor is that 0 sequence distributes to the wave beam；Repeat the step until all wave beams have distributed phase
The pilot frequency sequence that answers.
A kind of extensive mimo system multiuser downstream pilot design in 14. broadbands according to claim 9 and channel information
Acquisition methods, it is characterised in that：In each user's moving process, with the change of the characteristic of channel between base station and each user, dynamic
Implement the pilot tone scheduling process in ground.
A kind of extensive mimo system multiuser downstream pilot design in 15. broadbands according to claim 9 and channel information
Acquisition methods, it is characterised in that：In down channel training, user implements down channel using the pilot signal for receiving and estimates
Algorithm include but is not limited to channel estimation method based on compressed sensing.
A kind of extensive mimo system multiuser downstream pilot design in broadband of 16. employings as described in any one of claim 9-15
And the device of channel information acquisition method, it is characterised in that：Including base station side device and user-side device；
The base station side device, including：
Pilot frequency sequence generation module, for generating multiple Zadoff-Chu sequences according to different radical exponents, and will generate
Zadoff-Chu sequence is modulated through the different modulating factor, generates the sequence after modulation；
Descending pilot frequency pond, for the sequence after preserving the Zadoff-Chu sequence of the pilot frequency sequence generation module generation and modulating
Row；
Descending pilot frequency scheduler module, for being that each wave beam chooses down-bound pilot frequency signal from the ascending pilot frequency pond；
Pilot tone selection result sending module：For the selection result obtained by descending pilot frequency scheduler module is sent to each user；
And descending pilot frequency sending module, down going wave is sent for the wave beam pilot tone allocation result according to descending pilot frequency scheduler module
Beam domain pilot signal；
The user-side device, including：
Descending pilot frequency matrix generation module, for according to each downlink pilot tone selection result letter that sends from base station for receiving
Breath generates descending pilot frequency matrix；
And down channel estimation module, obtain for implementing channel information according to the pilot signal of descending pilot frequency matrix and reception
Take.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979611.4A CN106506133B (en) | 2016-11-08 | 2016-11-08 | Broadband extensive mimo system pilot tone pond and channel information acquisition method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979611.4A CN106506133B (en) | 2016-11-08 | 2016-11-08 | Broadband extensive mimo system pilot tone pond and channel information acquisition method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106506133A true CN106506133A (en) | 2017-03-15 |
| CN106506133B CN106506133B (en) | 2019-08-20 |
Family
ID=58324040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610979611.4A Active CN106506133B (en) | 2016-11-08 | 2016-11-08 | Broadband extensive mimo system pilot tone pond and channel information acquisition method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106506133B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474396A (en) * | 2017-09-07 | 2019-03-15 | 上海朗帛通信技术有限公司 | A kind of user equipment for wireless communication, the method and apparatus in base station |
| CN110048823A (en) * | 2019-03-14 | 2019-07-23 | 北京交通大学 | For going the non-orthogonal pilot distribution method of the extensive mimo system of honeycomb |
| WO2019148738A1 (en) * | 2018-01-30 | 2019-08-08 | 创新维度科技（北京）有限公司 | Downlink data transmission method and downlink data receiving method of internet of things |
| WO2020181536A1 (en) * | 2019-03-13 | 2020-09-17 | Zte Corporation | Multi-pilot reference signals |
| CN113242068A (en) * | 2021-05-10 | 2021-08-10 | 东南大学 | Intelligent communication beam collision avoidance method based on deep reinforcement learning |
| WO2024077482A1 (en) * | 2022-10-11 | 2024-04-18 | 华为技术有限公司 | Signal transmission method, and apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101064546A (en) * | 2006-04-28 | 2007-10-31 | 华为技术有限公司 | Pilot multiplexing method and wireless communication system |
| CN101064557A (en) * | 2006-04-25 | 2007-10-31 | 上海原动力通信科技有限公司 | Method for obtaining downlink channel quality information based on intelligent antenna |
| CN101426272A (en) * | 2007-11-02 | 2009-05-06 | 大唐移动通信设备有限公司 | Pilot resource distribution method, system and equipment |
| CN103973606A (en) * | 2014-05-23 | 2014-08-06 | 东南大学 | Pilot frequency and channel estimation method suitable for dual-polarization and multi-antenna satellite mobile communication |
| CN105610561A (en) * | 2016-01-29 | 2016-05-25 | 中国科学院计算技术研究所 | Pilot sequence allocation method in massive multiple-input multiple-output system |
-
2016
- 2016-11-08 CN CN201610979611.4A patent/CN106506133B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101064557A (en) * | 2006-04-25 | 2007-10-31 | 上海原动力通信科技有限公司 | Method for obtaining downlink channel quality information based on intelligent antenna |
| CN101064546A (en) * | 2006-04-28 | 2007-10-31 | 华为技术有限公司 | Pilot multiplexing method and wireless communication system |
| CN101426272A (en) * | 2007-11-02 | 2009-05-06 | 大唐移动通信设备有限公司 | Pilot resource distribution method, system and equipment |
| CN103973606A (en) * | 2014-05-23 | 2014-08-06 | 东南大学 | Pilot frequency and channel estimation method suitable for dual-polarization and multi-antenna satellite mobile communication |
| CN105610561A (en) * | 2016-01-29 | 2016-05-25 | 中国科学院计算技术研究所 | Pilot sequence allocation method in massive multiple-input multiple-output system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474396A (en) * | 2017-09-07 | 2019-03-15 | 上海朗帛通信技术有限公司 | A kind of user equipment for wireless communication, the method and apparatus in base station |
| CN109474396B (en) * | 2017-09-07 | 2021-01-26 | 上海朗帛通信技术有限公司 | Method and device in user equipment and base station for wireless communication |
| WO2019148738A1 (en) * | 2018-01-30 | 2019-08-08 | 创新维度科技（北京）有限公司 | Downlink data transmission method and downlink data receiving method of internet of things |
| WO2020181536A1 (en) * | 2019-03-13 | 2020-09-17 | Zte Corporation | Multi-pilot reference signals |
| CN110048823A (en) * | 2019-03-14 | 2019-07-23 | 北京交通大学 | For going the non-orthogonal pilot distribution method of the extensive mimo system of honeycomb |
| CN113242068A (en) * | 2021-05-10 | 2021-08-10 | 东南大学 | Intelligent communication beam collision avoidance method based on deep reinforcement learning |
| WO2024077482A1 (en) * | 2022-10-11 | 2024-04-18 | 华为技术有限公司 | Signal transmission method, and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106506133B (en) | 2019-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106506133B (en) | Broadband extensive mimo system pilot tone pond and channel information acquisition method and system | |
| CN103546264B (en) | Extensive mimo wireless communication method based on pilot frequency multiplexing | |
| CN100385847C (en) | Scattered pilot pattern and channel estimation method for MIMO-OFDM systems | |
| RU2321949C1 (en) | Device and method for transmitting data using selected own vector in mimo-system of closed contour mobile communications | |
| RU2481712C2 (en) | Mobile communication system, receiving device and signal transmission method | |
| CN104219189B (en) | The extensive MIMO communication means in angle time delay domain pilot frequency multiplexing broadband | |
| CN104780128B (en) | A kind of estimation of underwater sound OFDMA uplink communication condition of sparse channel and pilot frequency optimization method | |
| CN104702390B (en) | Pilot distribution method in the estimation of distributed compression channel perception | |
| JP5345133B2 (en) | Mobile communication system, receiving apparatus and method | |
| CN104022977B (en) | A kind of channel matrix being applied to MIMO ofdm system and interference covariance matrix method of estimation | |
| KR20070038552A (en) | Iterative channel and interference estimation with dedicated pilot tones for ofdma | |
| CN101340223A (en) | System resource distribution method and device based on wave beam shaping | |
| CN103634244A (en) | Densely-distributed wireless network dynamic pilot multiplexing channel estimation and pilot frequency distribution method | |
| CN104869086B (en) | MIMO ofdm communication system down channels method of estimation, device based on two dimensional compaction perception | |
| JP2010158010A (en) | Wireless communication system using pilot allocation, method and pilot pattern thereof | |
| CN108123786B (en) | TDCS multiple access method based on interleaving multiple access | |
| CN102223327A (en) | SAGE (Space-alternating Generalized Expectation-maximization) based channel estimation method in CoMP multi-user system | |
| CN101765123B (en) | Method for distributing uplink resource of multi-user MIMO-OFDM | |
| CN107666451A (en) | Channel estimation methods for LTE system | |
| CN107276934B (en) | A kind of extensive mimo system multi-user uplink Robust Detection Method | |
| CN110519029A (en) | Honeycomb mixes extensive MIMO pilot frequency multiplexing channel obtaining method with V2V | |
| CN106063212A (en) | Method and device for generating non-gaussian interference channel in wireless communication system | |
| Oltean et al. | Wavelet OFDM performance in frequency selective fading channels | |
| CN115065432A (en) | Sky wave large-scale MIMO triple beam base channel modeling and channel information acquisition | |
| CN107770104A (en) | A kind of channel estimation pilot optimization method and device based on compressed sensing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |