CN106209699B - A kind of method and relevant device of channel estimation - Google Patents
A kind of method and relevant device of channel estimation Download PDFInfo
- Publication number
- CN106209699B CN106209699B CN201610489550.3A CN201610489550A CN106209699B CN 106209699 B CN106209699 B CN 106209699B CN 201610489550 A CN201610489550 A CN 201610489550A CN 106209699 B CN106209699 B CN 106209699B
- Authority
- CN
- China
- Prior art keywords
- filter coefficients
- pilot signal
- antenna port
- port
- pilot
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- H04L25/0204—Channel estimation of multiple channels
-
- 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
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
- H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
- H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
Abstract
The embodiment of the invention discloses a kind of method of channel estimation and relevant devices to improve the performance of channel estimation for inhibiting the interference of other multiplexing ports.The method comprise the steps that extracting the pilot signal received in signal；To pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, the pilot signal for filter coefficients is obtained；Determine each antenna port is used for filter coefficients coefficient corresponding to filter coefficients；According to the corresponding filter coefficients coefficient of each antenna port of the vector sum of the pilot signal for filter coefficients, the channel response estimated value of each antenna port is calculated.The embodiment of the invention also provides a kind of device of channel estimation, a kind of user equipment improves the performance of channel estimation for inhibiting the interference of other multiplexing ports.
Description
Technical field
The present invention relates to the communications field more particularly to the methods and relevant device of a kind of channel estimation.
Background technique
Human society to mobile data services increasing demand just drive wireless communication system towards larger capacity,
The target continuous development of higher quality user experience, broader applications scene.Wireless communication system channel experienced is usually
Time-frequency variation, so wireless communication system needs channel estimation to carry out detection data, height is usually realized by pilot signal
The channel estimation of reliability.Since pilot signal needs to occupy certain running time-frequency resource, in order to save overhead as far as possible, when
When required pilot signal is more, the same type of pilot signal of corresponding different antennae port is usually passed through into code division multiplexing
The mode of (code division multiplexing, abbreviation: CDM) is in identical running time-frequency resource superposed transmission.But due to nothing
The variability of line communication channel, such method may also can bring some problems.For example, transmission signal is through superrefraction and is reflected into
Multipath is formed up to receiver；Alternatively, the characteristic of channel is presented as rapid fading, different pilot tones on time-frequency when mobile station quickly moves
Point undergoes different channel fadings, and the signal in orthogonal between mutiple antennas port is destroyed, can be gone out between pilot signals
It now interferes, and then influences channel estimating performance.
Summary of the invention
The embodiment of the invention provides a kind of method of channel estimation and relevant devices, for restoring the letter of port to be estimated
Road inhibits the interference of other multiplexing ports, improves the performance of channel estimation.
In a first aspect, being applied to communication system, the communication system the embodiment of the invention provides a kind of method of channel estimation
System includes receiving end and transmitting terminal, and the receiving end and transmitting terminal all use mutiple antennas (or aerial array), constitute simultaneously
One wireless multiple-input and multiple-output (multiple input multiple output, abbreviation: MIMO) system.Communication system
Including NpA antenna port, NpA antenna port is multiplexed identical running time-frequency resource and transmits pilot signal, NpFor just more than or equal to 2
Integer, this method comprises:
The pilot signal received in signal is extracted, the pilot signal is it can be appreciated that reception signal at pilot tone.It receives
The pilot signal received in signal is extracted according to the allocation index where known pilot signal in end.To the pilot signal and accordingly
Pilot frequency sequence complex conjugate multiplication, obtain the pilot signal for filter coefficients；Determine each antenna port is used for filter coefficients
Corresponding filter coefficients coefficient；It is inserted according to the corresponding filtering of each antenna port of the vector sum of the pilot signal for filter coefficients
Value coefficient calculates the channel response estimated value of each antenna port.
In the embodiment of the present invention, interpolation is directly filtered according to the LS channel estimation value of pilot signal, is obtained
Channel estimation value at each data point, the coefficient of filter coefficients consider the interference of the pilot signal from other multiplexing ports
Effect, even if also can be very good the channel for restoring port to be estimated under the channel background of time-frequency Selective intensity, inhibiting other
The interference of multiplexing port improves the performance of channel estimation.
In one possible implementation, it to pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, is used for
After the pilot signal of filter coefficients, before the filter coefficients coefficient for determining different antennae port, method further include: to the Np
The pilot signal corresponding to each port in a antenna port carries out N 'occExponent part despreading, and N 'occLess than Nocc, NpIt is small
In equal to Nocc, the NoccFor NpA antenna port is multiplexed the original order of identical running time-frequency resource, the N 'occ, NoccAnd Np?
For positive integer.
To NpPilot signal corresponding to each port in a antenna port carries out No′ccAfter exponent part despreading, to process
N′occThe design that the pilot signal of rank despreading is filtered interpolation filter factor at this time need to only consider from through N 'occExponent part solution
The interference of remaining antenna port after expansion.Partly despread can reduce the dimension of filter coefficients coefficient vector.It is slotting being filtered
When value, it is contemplated that other multiplexing ports treat the influence for estimating the interference signal of port, even if in the channel of time-frequency Selective intensity
It under background, also can preferably inhibit the interference of other multiplexing ports, so as to restore the channel of port to be estimated well, improve
The performance of channel estimation.
In one possible implementation, extracting the pilot signal received in signal includes:
The pilot signal received in signal is indicated with following formula:
Wherein,For port piCorresponding channel response；For port piPilot signal in resource element
(kp,lp) position spreading code, (kp,lp) for indicating the time-frequency domain coordinate of resource element shared by pilot tone,For pilot tone symbol
Number；For noise；NpFor the antenna port number being actually multiplexed.
In one possible implementation, it to the pilot frequency sequence complex conjugate multiplication of pilot signal and response, is used for
The vector of the pilot signal of filter coefficients includes:
To the pilot frequency sequence complex conjugate multiplication of pilot signal and response, the pilot signal for filter coefficients is obtained by such as
Lower formula indicates:
Wherein, (kp, lp) for indicating the resource element coordinate of pilot signal；Indicate the pilot tone for being used for filter coefficients
Signal,For pilot frequency sequence complex conjugate；
According toObtain the vector of the pilot signal for filter coefficients.
In one possible implementation, determine each antenna port is used for filter coefficients system corresponding to filter coefficients
Number includes:
Filter coefficients coefficient is obtained by two-dimentional wiener criterion:
Wherein, R'HHChannel response for resource element (k, l) to be estimated and each pilot resource element for filter coefficients
Channel cross correlation vector between channel response；RHHBetween the channel response for each pilot resource element of filter coefficients
Channel correlation matrix；For the port p receivedjPilot signal power；For the port p receivediPilot tone
The power of signal；For by port pjWith port pjThe matrix that constitutes of spreading code, m row n column element isThat is resource element shared by pilot toneWithCorresponding port piWith port pjExpansion
The product of frequency code；Representing matrix dot product；For noise power, I indicates unit matrix；NpFor the antenna port number being actually multiplexed
Amount.
In one possible implementation, corresponding according to each antenna port of pilot signal vector sum for filter coefficients
Filter coefficients coefficient, the channel response estimated value for calculating each antenna port includes:
The channel response estimated value of antenna port is calculated by following formula:
Wherein,For for obtaining channel at resource element (k, l)
The vector of the pilot signal of filter coefficients needed for response estimation value,Indicate the resource element that corresponding pilot signal occupies
Plain label；T indicates transposition；For antenna port piCorresponding filter coefficients coefficient.
In one possible implementation, to NpPilot signal corresponding to each port in a antenna port carries out
N′occExponent part despreading, comprising:
By the port p of Partly despreadiThe pilot signal for filter coefficients can indicate are as follows:
Wherein, N 'occFor Partly despread order,Indicate the pilot signal for being used for filter coefficients, (k 'p,l′p) it is portion
The time-frequency domain coordinate of corresponding equivalent resources element after expanding is decomposed,For for obtaining equivalent resources element (k 'p,l′p)
Locate the time-frequency domain coordinate needed for the pilot signal of Partly despread for the pilot signal of filter coefficients,For port pi's
Pilot signal is in resource elementThe spreading code of position.
In one possible implementation, determine each antenna port is used for filter coefficients system corresponding to filter coefficients
Number, comprising:
Filter coefficients coefficient is obtained by two-dimentional wiener criterion:
Wherein, R'HHFor resource element (k, l) to be estimated channel response with for filter coefficients by each of Partly despread
Channel cross correlation vector between the channel response of pilot resource element；RHHFor for filter coefficients by each of Partly despread
Channel correlation matrix between the channel response of pilot resource element；For by port piWith port pjBy part
The matrix that spreading code after despreading is constituted；For the port p receivediPilot signal power；It receives
Port pjPilot signal power；N′occFor the order of Partly despread, N 'pFor the antenna port being multiplexed after Partly despread
Quantity.
In one possible implementation, according to each antenna port pair of vector sum of the pilot signal for filter coefficients
The filter coefficients coefficient answered calculates the channel response estimated value of each antenna port, comprising:
The channel response estimated value of antenna port is calculated by following formula:
Wherein,For the warp for filter coefficients
The vector of the pilot signal of Partly despread is crossed,Indicate the resource element that response is occupied by the pilot signal of Partly despread
Plain label；T indicates transposition,For antenna port piCorresponding filter coefficients coefficient.
Second aspect has the embodiment of the invention provides a kind of device of channel estimation and realizes reality in the above method
Function performed by the device of middle channel estimation.The function can also be executed corresponding by hardware realization by hardware
Software realization.The hardware or software include one or more modules corresponding with above-mentioned function.
The third aspect, the embodiment of the invention provides a kind of computer storage mediums, for storing above-mentioned channel estimation dress
Computer software instructions used are set, it includes for executing program designed by above-mentioned aspect.
Fourth aspect includes memory in the structure of the user equipment the embodiment of the invention provides a kind of user equipment,
Transceiver and processor.Wherein memory is for storing computer executable program code, and and transceiver couples.The program generation
Code includes instruction, and when the processor executes the instruction, which execute the user equipment in the method for above-mentioned first aspect
Related information or instruction.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the technical staff of field, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the architecture diagram of communication system in the embodiment of the present invention；
Fig. 2 is resource grid schematic diagram in the embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of one embodiment of the method for channel estimation of the embodiment of the present invention；
Fig. 4 is pilot signal of embodiment of the present invention pattern schematic diagram；
Fig. 5 is a kind of schematic diagram of another embodiment of the method for channel estimation of the embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram of one embodiment of the device of channel estimation of the embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of another embodiment of the device of channel estimation of the embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of one embodiment of user equipment of the embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of method of channel estimation and relevant devices, are used for
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating herein
Or the sequence other than the content of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
The embodiment of the invention provides a kind of method of channel estimation, this method is applied to a kind of communication system, please refers to
Shown in Fig. 1, Fig. 1 is the architecture diagram of communication system of the embodiment of the present invention.The communication system includes receiving end and transmitting terminal, the reception
End and transmitting terminal all use mutiple antennas (or aerial array), while constituting a wireless multiple-input and multiple-output
(multiple input multiple output, abbreviation: MIMO) system.For example, transmitting terminal has tx transmitting antenna, receive
There is rx receiving antenna at end.In transmitting terminal, the data bit flow that needs to send by coding, modulation, interweave and etc. after, number
It is changed into data-signal from bit form according to stream, and is converted to parallel data from serial data, these data-signals is assigned to
Different transmission antennas, signal pass through after wireless channel, are sent to receiving end.The way system can be universal mobile communications skill
The long term evolution (long term evolution, abbreviation: LTE) or long-term evolution upgrading (long term evolution of art
Advanced, abbreviation: LTE-A) system, communication system is illustrated by taking lte-a system as an example in the embodiment of the present invention, but unlimited
Determine LTE-A communication system.Receiving end in the embodiment of the present invention can be user equipment, and transmitting terminal can be base station, eNode B
Or Node B.Communication system is illustrated by taking downlink as an example in the embodiment of the present invention.
Channel estimation based on pilot signal is applied to the system continuously transmitted, by being inserted into the useful data of transmission
Known pilot signal, the channel estimation results of available pilot frequency locations, followed by the channel estimation of pilot positions
As a result, obtaining the channel estimation results of useful data position by filter coefficients.
Pilot signal has multiple types.For example, by taking downlink as an example, including cell special reference (cell-
Specific reference signals, abbreviation: C-RS), user's DRS (Dedicated Reference Signal) (UE-specifie reference
Signals, abbreviation: UE-RS), UE-RS is also known as demodulated reference signal (Demodulation reference signals, contracting
Write: DM-RS), position reference (Positioning reference signals, abbreviation: P-RS) and channel status
Measuring reference signals (Channel State Information-Reference Signal, abbreviation: CSI-RS).
The communication system includes mutiple antennas port, which is a concept in logic, it and physical antenna
Not necessarily one-to-one relationship.In the downlink, antenna port and down-bound pilot frequency signal have corresponding relationship, pilot tone
Signal is also known as reference signal (Reference signal, abbreviation: RS), if reference signal is transmitted by multiple physical antennas
Same type of reference signal, then these physical antennas just correspond to the same antenna port；And if there are two different ginsengs
Examining signal is transmitted from the same physical antenna, then this physical antenna just corresponds to two independent antenna ports.
It is briefly described below using the corresponding relationship of UE-RS and antenna port as example, UE-RS is used for the use of PDSCH
Family channel estimation conciliates adjusting data.In LTE, UE-RS could support up the transmission of 8 antenna ports, and two antenna port transmission occupy
Antenna port 7,8, four antenna port transmission occupy antenna port 7,8,9,10, eight antenna ports 7~14.
The reference signal of antenna port 7 and antenna port 8 has used same group of running time-frequency resource, provides in LTE protocol, day
The reference signal of line end mouth 7,8,11,13 uses same group of running time-frequency resource；9,10,12,14 reference signal of antenna port also uses
Same group of running time-frequency resource, only reference signal position is compared to one subcarrier of overall frequency shift for antenna port 7,8,11,13.This
Four antenna port of sample shares one group of running time-frequency resource, and receiver can distinguish each reference signal by orthogonal sequence spread spectrum.
Understood incorporated by reference to Fig. 2, transmits distribution and arrangement of the signal in time domain and frequency domain and show as running time-frequency resource grid
The form of lattice, resource element (Resource Element, abbreviation: RE) are the basic component in running time-frequency resource grid.It can
To use (k, l) to indicate the time-frequency domain coordinate of RE.In communication system, the unit for describing resource impact is resource block (Resource
Block, abbreviation: RB), byA resource element composition.Resource grid in each time slot byA resource block group
At.Wherein,Indicate orthogonal frequency division multiplexing (the Orthogonal Frequency Division in each time slot
Multiplexing, abbreviation: OFDM) symbolic number；Indicate the sub-carrier number in each resource block；Indicate downlink transfer
Broadband.
This method is applied to communication system, and the communication system includes NpA antenna port, the NpA antenna port multiplexing
Identical running time-frequency resource transmits pilot signal, the NpFor the positive integer more than or equal to 2.It please refers to shown in Fig. 3, the present invention is implemented
One embodiment of method that example provides a kind of channel estimation includes:
Step 301 receives signal by receiving antenna.
Communication system includes receiving end and transmitting terminal.For example, transmitting terminal has tx transmitting antenna, there be rx reception in receiving end
Antenna.In transmitting terminal, the data bit flow that needs to send by coding, modulation, interweave and etc. after, data flow is from than special-shaped
Formula is changed into data-signal, these data-signals are assigned to different transmission antennas, and signal passes through after wireless channel, receives
Terminating the signal received not only includes the useful signal from different transmitting antennas, and there are also what channel and surrounding enviroment generated to make an uproar
Sound.
Step 302 extracts the received pilot signal received in signal.
Understood incorporated by reference to Fig. 4, Fig. 4 is pilot signal pattern diagram.The regular certain moneys of selection in resource grid
Source element, and the known pilot signal in sending and receiving end is transmitted on these resource elements.Point of the pilot signal in resource grid
Cloth is pilot tone pattern.For example, pilot tone pattern has Comb Pilot, Block-type pilot and spreads shape pilot tone.The reception signal includes
With data and pilot signal, the useful data and pilot signal are transmitted by time division multiplexing.In the communications, by
Known pilot signal is inserted into OFDM symbol to estimate channel parameter.Receiving end is according to the ground where known pilot signal
Location index extracts the pilot signal received in signal.
Pilot signal in the reception signal can be indicated by following formula:
Wherein,For port piCorresponding channel response；For port piPilot signal in resource element
(kp,lp) position spreading code, (kp,lp) for indicating the time-frequency domain coordinate of resource element shared by pilot tone,For pilot tone symbol
Number；For noise；NpFor the antenna port number being actually multiplexed.
Step 303, to the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, obtain the pilot tone for filter coefficients
Signal.
It is described to the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, obtain for filter coefficients pilot tone believe
It number is indicated by following formula:
Wherein, (kp, lp) for indicating the resource element coordinate of pilot signal；Indicate the pilot tone for being used for filter coefficients
Signal,For pilot frequency sequence complex conjugate.
Least square (LS) channel estimation has been carried out to signal is received by above-mentioned formula, has obtained pilot signal (kp,lp)
The channel response estimated value at place.
According to describedIt obtains for obtaining filter coefficients needed for channel response estimated value at resource element (k, l)
Pilot signal vector.The vector is indicated with following formula:Its
In,Indicate that the resource element label that response pilot signal occupies, T indicate transposition.
Step 304, determine each antenna port for filter coefficients coefficient corresponding to filter coefficients.
Filter coefficients coefficient can be based on a variety of criterion.For example, two-dimentional wiener criterion, linear interpolation and least mean-square error
Deng in the embodiment of the present invention, filter coefficients coefficient is illustrated by taking two-dimentional wiener criterion as an example.Filter coefficients coefficient can be pre-
It first generates and carries out afterwards pre-stored, be also possible to be calculated in real time.Each antenna port of determination for filter it is slotting
The corresponding filter coefficients coefficient of value includes:
Filter coefficients coefficient is obtained by two-dimentional wiener criterion:
Wherein, R'HHChannel response for resource element (k, l) to be estimated and each pilot resource element for filter coefficients
Channel cross correlation vector between channel response；RHHBetween the channel response for each pilot resource element of filter coefficients
Channel correlation matrix；For the port p receivedjPilot signal power；For the port p receivediPilot tone
The power of signal；For by port pjWith port pjThe matrix that constitutes of spreading code, m row n column element isThat is resource element shared by pilot toneWithCorresponding port piWith port pjExpansion
The product of frequency code；Representing matrix dot product；For noise power, I indicates unit matrix；NpFor the antenna port number being actually multiplexed
Amount.
Filtered difference coefficient in the embodiment of the present invention is in view of other multiplexing ports are to port piSignal interference, port
pjWith port piFor multiplexing port, multiplexing port instructs the port of the identical running time-frequency resource of frequency signal multiplexing.For example, antenna port 7,
8, the identical running time-frequency resource of 11,13 multiplexings, port 7 are port pi, then port pjFor port 8, port 11 and port 13.
Understood incorporated by reference to Fig. 4, resource element (k, l) includes data resource element and pilot resources member in above-mentioned formula
Element, the time-frequency coordinate representation of pilot resource element are (kp,lp)。
Step 305, be used for according to this filter coefficients pilot signal the corresponding filter coefficients of each antenna port of vector sum
Coefficient calculates the channel response estimated value of each antenna port.
The channel response estimated value of antenna port is calculated by following formula:
Wherein,For the pilot signal for filter coefficients to
Amount,Indicate the resource element label that corresponding pilot signal occupies；T indicates transposition；For antenna port piIt is corresponding
Filter coefficients coefficient,For a vector, expression formula are as follows:
In the embodiment of the present invention, interpolation is directly filtered according to the LS channel estimation value of pilot signal, obtains each number
Channel estimation value at strong point, the coefficient of filter coefficients consider the interference effect of the pilot signal from other multiplexing ports,
Even if also can be very good the channel for restoring port to be estimated under the channel background of time-frequency Selective intensity, inhibiting other multiplexings
The interference of port improves the performance of channel estimation.
It please refers to shown in Fig. 5, the present invention also provides another embodiment of a kind of method of channel estimation, the present invention is real
It applies in example, by NoccThe N of rank CDM multiplexingpAfter the pilot signal of a port does Partly despread, it is filtered interpolation and is counted
According to the channel estimation results of resource element.Specifically method and step includes:
Step 301 of the step 501 into step 503 embodiment corresponding with Fig. 3 is not repeated herein to 303 identical.
Step 504, to the NpThe pilot signal corresponding to each port in a antenna port carries out N 'occRank portion
It decomposes and expands, and N 'occLess than Nocc, NpLess than or equal to Nocc, the NoccFor NpA antenna port is multiplexed the original of identical running time-frequency resource
Beginning order, the N 'occ, NoccAnd NpIt is positive integer.
By the port p of Partly despreadiThe pilot signal for filter coefficients can indicate are as follows:
Wherein, N 'occFor Partly despread order,Indicate the pilot signal for being used for filter coefficients, (k 'p,l′p) it is portion
The time-frequency domain coordinate of corresponding equivalent resources element after expanding is decomposed,For for obtaining equivalent resources element (k 'p,l′p)
Locate the time-frequency domain coordinate needed for the pilot signal of Partly despread for the pilot signal of filter coefficients,For port pi's
Pilot signal is in resource elementThe spreading code of position.
Step 505, determine each antenna port for filter coefficients coefficient corresponding to filter coefficients；
The filter coefficients coefficient is obtained by two-dimentional wiener criterion:
Wherein, R'HHChannel response for resource element (k, l) to be estimated and each pilot resource element for filter coefficients
Channel cross correlation vector between channel response；RHHBetween the channel response for each pilot resource element of filter coefficients
Channel correlation matrix；For the port p receivedjPilot signal power；For the port p receivediPilot tone
The power of signal；For by port pjWith port piThe matrix that constitutes of spreading code after Partly despread, m row n
Column element isThat is resource element shared by pilot toneWithCorresponding port piThe end and
Mouth pjSpreading code product；Representing matrix dot product；For noise power, I indicates unit matrix；N′pFor by Partly despread
Remaining antenna port quantity afterwards.
It is understood that being illustrated by taking DM-RS as an example such as in LTE system, DM-RS passes through the money that spread spectrum occupies
Source element occurs in pairs, and the resource element of a DM-RS (occupies same sub-carrier to comprising two DM-RS resource elements
With adjacent two OFDM symbols), so in the DM-RS resource element to inside it is considered that channel is constant, Jin Erke
First 2 ranks to be used to de-spread, to achieve the purpose that reduce the number of the pilot signal for filter coefficients, while section ports are eliminated
The interference of pilot signal can eliminate the interference from port 8 and port 13 by the despreading of 2 ranks, then to warp by taking port 7 as an example
The pilot signal for crossing the despreading of 2 ranks, which is filtered the design of interpolation filter factor at this time, need to only consider from through N 'occExponent part despreading
The interference of remaining antenna port (port 11) afterwards.
Step 506, the corresponding institute of each antenna port according to the vector sum for the pilot signal of filter coefficients
Filter coefficients coefficient is stated, the channel response estimated value of each antenna port is calculated.
The channel respective response estimated value of antenna port is calculated by following formula:
Wherein,For the warp for filter coefficients
The pilot signal vector of Partly despread is crossed,Indicate the resource element accordingly occupied by the pilot signal of Partly despread
Label；T indicates transposition,For antenna port piCorresponding filter coefficients coefficient；For a vector, expression formula are as follows:
In the embodiment of the present invention, by NoccThe pilot signal of each port of rank CDM multiplexing is No′ccExponent part despreading
Afterwards, it is filtered interpolation and obtains the channel estimation results of data resource element.Partly despread can reduce filter coefficients coefficient to
The dimension of amount.When being filtered interpolation, it is contemplated that other multiplexing ports treat the influence for estimating the interference signal of port, even if
Under the channel background of time-frequency Selective intensity, it also can preferably inhibit the interference of other multiplexing ports, so as to go back well
The channel of original port to be estimated, improves the performance of channel estimation.
A kind of method of channel estimation is described above, below to the device of channel estimation applied by this method
It is specifically described, please refers to shown in Fig. 6, one embodiment of the device 600 of channel estimation includes:
The device is applied to communication system, and the communication system includes NpA antenna port, the NpA antenna port multiplexing
Identical running time-frequency resource transmits pilot signal, the NpFor the positive integer more than or equal to 2, shown device includes:
Receiving module 601, for receiving the signal of transmitting terminal transmission.
Extraction module 602, for extracting the pilot signal in 601 received signal of receiving module.
First computing module 603, the pilot signal for being extracted to the extraction module 602 and corresponding pilot tone sequence
Column complex conjugate multiplication obtains the pilot signal for filter coefficients；
Determining module 604, for determine each antenna port for filter coefficients coefficient corresponding to filter coefficients；
Second computing module 605, the pilot tone for filter coefficients for being calculated according to first computing module 603 are believed
Number vector sum described in the corresponding filter coefficients coefficient of each antenna port that determines of determining module 604, calculate each day
The channel response estimated value of line end mouth.
Optionally, the pilot signal received in signal can be indicated with following formula:
Wherein,For port piCorresponding channel response；For port piPilot signal in resource element
(kp,lp) position spreading code, (kp,lp) for indicating the time-frequency domain coordinate of resource element shared by pilot tone,For pilot tone symbol
Number；For noise；NpFor the antenna port number being actually multiplexed.
Optionally, the first computing module 603 is also used to the pilot signal and corresponding pilot frequency sequence complex conjugate phase
Multiply, obtain indicating for the pilot signal of filter coefficients by following formula:
Wherein, (kp, lp) for indicating the resource element coordinate of pilot signal；Indicate the pilot tone for being used for filter coefficients
Signal,For pilot frequency sequence complex conjugate；
According to describedObtain the vector of the pilot signal for filter coefficients.
Optionally, the determining module 604 is also used to obtain the filtered difference coefficient by two-dimentional wiener criterion:
Wherein, R'HHChannel response for resource element (k, l) to be estimated and each pilot resource element for filter coefficients
Channel cross correlation vector between channel response；RHHBetween the channel response for each pilot resource element of filter coefficients
Channel correlation matrix；For the port p receivedjPilot signal power；For the port p receivediPilot tone
The power of signal；For by port pjWith port pjThe matrix that constitutes of spreading code, m row n column element isThat is resource element shared by pilot toneWithCorresponding port piWith port pjExpansion
The product of frequency code；Representing matrix dot product；For noise power, I indicates unit matrix；NpFor the antenna port number being actually multiplexed
Amount.
Optionally, the second computing module 605 is also used to calculate antenna port in the pilot signal position by following formula
The channel response estimated value set:
Wherein,For for obtaining channel at resource element (k, l)
The vector of the pilot signal of filter coefficients needed for response estimation value,Indicate the resource element that response pilot signal occupies
Plain label；T indicates transposition；For antenna port piCorresponding filter coefficients coefficient.In the base of the corresponding embodiment of above-mentioned Fig. 6
It on plinth, please refers to shown in Fig. 7, the embodiment of the invention also provides a kind of another embodiments of the device 700 of channel estimation, should
Device further include:
Receiving module 601, for receiving the signal of transmitting terminal transmission.
Extraction module 602, for extracting the pilot signal in 601 received signal of receiving module.
First computing module 603, the pilot tone sequence of the pilot signal and response for being extracted to the extraction module 602
Column complex conjugate multiplication obtains the pilot signal for filter coefficients；
Module 606 is de-spread, for the NpThe pilot signal corresponding to each port in a antenna port carries out
N′occExponent part despreading, and N 'occLess than Nocc, NpLess than or equal to Nocc, the NoccFor NpA antenna port is multiplexed identical time-frequency
The original order of resource, the N 'occ, NoccAnd NpIt is positive integer.
Determining module 604, for determine each antenna port for filter coefficients coefficient corresponding to filter coefficients.
Second computing module 605, the pilot signal for filter coefficients for being calculated according to first computing module
Vector sum described in the corresponding filter coefficients coefficient of each antenna port that determines of determining module, calculate each antenna port
Channel response estimated value.
Optionally, by the port p of Partly despreadiThe pilot signal for filter coefficients can indicate are as follows:
Wherein, N 'occFor Partly despread order,Indicate the pilot signal for being used for filter coefficients, (k 'p,l′p) it is portion
The time-frequency domain coordinate of corresponding equivalent resources element after expanding is decomposed,For for obtaining equivalent resources element (k 'p,l′p)
Locate the time-frequency domain coordinate needed for the pilot signal of Partly despread for the pilot signal of filter coefficients,For port pi's
Pilot signal is in resource elementThe spreading code of position.
Optionally, the determining module 604 is also used to obtain the filter coefficients coefficient by two-dimentional wiener criterion:
Wherein, R'HHFor resource element (k, l) to be estimated channel response with for filter coefficients by each of Partly despread
Channel cross correlation vector between the channel response of pilot resource element；RHHFor for filter coefficients by each of Partly despread
Channel correlation matrix between the channel response of pilot resource element；For by port piWith port pjBy part
The matrix that spreading code after despreading is constituted；For the port p receivediPilot signal power；For the end received
Mouth pjPilot signal power；N′occFor the order of Partly despread, N 'pFor remaining antenna port number after Partly despread
Amount.
Optionally, second computing module 605 is also used to calculate the channel response of each antenna port by following formula
Estimated value:
Wherein,For the warp for filter coefficients
The vector of the pilot signal of Partly despread is crossed,Indicate the resource element that response is occupied by the pilot signal of Partly despread
Plain label；T indicates transposition,For antenna port piCorresponding filter coefficients coefficient.
Further, device in Fig. 6 and Fig. 7 is presented in the form of functional module.Here " module " can refer to
Application-specific integrated circuit (application-specific integrated circuit, ASIC), circuit execute one
Or the processor and memory of multiple softwares or firmware program, integrated logic circuit and/or other above-mentioned function can be provided
Device.In a simple embodiment, the device in Fig. 6 and Fig. 7 can use form shown in Fig. 8.Each module can lead to
The transceiver, processor and memory of Fig. 8 is crossed to realize.
The embodiment of the invention also provides the devices of another channel estimation, as shown in figure 8, for ease of description, only showing
Go out part related to the embodiment of the present invention, it is disclosed by specific technical details, please refer to present invention method part.
The terminal can be include mobile phone, tablet computer, PDA (Personal Digital Assistant, personal digital assistant),
Any terminal device such as vehicle-mounted computer, taking the terminal as an example:
Fig. 8 shows the block diagram of the part-structure of mobile phone relevant to terminal provided in an embodiment of the present invention.With reference to figure
8, mobile phone include: radio frequency (Radio Frequency, RF) circuit 810, memory 820, input unit 830, display unit 840,
Sensor 850, voicefrequency circuit 860, Wireless Fidelity (wireless fidelity, WiFi) module 870, processor 880 and
The components such as power supply 890.It will be understood by those skilled in the art that handset structure shown in Fig. 8 does not constitute the restriction to mobile phone,
It may include perhaps combining certain components or different component layouts than illustrating more or fewer components.
It is specifically introduced below with reference to each component parts of the Fig. 8 to mobile phone:
RF circuit 810 can be used for receiving and sending messages or communication process in, signal sends and receivees, particularly, by base station
After downlink information receives, handled to processor 880；In addition, the data for designing uplink are sent to base station.In general, RF circuit 810
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier (Low Noise
Amplifier, LNA), duplexer etc..In addition, RF circuit 810 can also be communicated with network and other equipment by wireless communication.
Any communication standard or agreement, including but not limited to global system for mobile communications (Global can be used in above-mentioned wireless communication
System of Mobile communication, GSM), general packet radio service (General Packet Radio
Service, GPRS), CDMA (Code Division Multiple Access, CDMA), wideband code division multiple access
(Wideband Code Division Multiple Access, WCDMA), long term evolution (Long Term Evolution,
LTE), Email, short message service (Short Messaging Service, SMS) etc..
Memory 820 can be used for storing software program and module, and processor 880 is stored in memory 820 by operation
Software program and module, thereby executing the various function application and data processing of mobile phone.Memory 820 can mainly include
Storing program area and storage data area, wherein storing program area can application journey needed for storage program area, at least one function
Sequence (such as sound-playing function, image player function etc.) etc.；Storage data area can be stored to be created according to using for mobile phone
Data (such as audio data, phone directory etc.) etc..It, can be in addition, memory 820 may include high-speed random access memory
Including nonvolatile memory, for example, at least a disk memory, flush memory device or other volatile solid-states
Part.
Input unit 830 can be used for receiving the number or character information of input, and generate with the user setting of mobile phone with
And the related key signals input of function control.Specifically, input unit 830 may include that touch panel 831 and other inputs are set
Standby 832.Touch panel 831, also referred to as touch screen, collect user on it or nearby touch operation (such as user use
The operation of any suitable object or attachment such as finger, stylus on touch panel 831 or near touch panel 831), and root
Corresponding attachment device is driven according to preset formula.Optionally, touch panel 831 may include touch detecting apparatus and touch
Two parts of controller.Wherein, the touch orientation of touch detecting apparatus detection user, and touch operation bring signal is detected,
Transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into touching
Point coordinate, then gives processor 880, and can receive order that processor 880 is sent and be executed.Furthermore, it is possible to using electricity
The multiple types such as resistive, condenser type, infrared ray and surface acoustic wave realize touch panel 831.In addition to touch panel 831, input
Unit 830 can also include other input equipments 832.Specifically, other input equipments 832 can include but is not limited to secondary or physical bond
One of disk, function key (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc. are a variety of.
Display unit 840 can be used for showing information input by user or be supplied to user information and mobile phone it is various
Menu.Display unit 840 may include display panel 841, optionally, can use liquid crystal display (Liquid Crystal
Display, LCD), the forms such as Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) it is aobvious to configure
Show panel 841.Further, touch panel 831 can cover display panel 841, when touch panel 831 detect it is on it or attached
After close touch operation, processor 880 is sent to determine the type of touch event, is followed by subsequent processing device 880 according to touch event
Type corresponding visual output is provided on display panel 841.Although in fig. 8, touch panel 831 and display panel 841
It is that the input and input function of mobile phone are realized as two independent components, but in some embodiments it is possible to by touch-control
Panel 831 and display panel 841 are integrated and that realizes mobile phone output and input function.
Mobile phone may also include at least one sensor 850, such as optical sensor, motion sensor and other sensors.
Specifically, optical sensor may include ambient light sensor and proximity sensor, wherein ambient light sensor can be according to ambient light
Light and shade adjust the brightness of display panel 841, proximity sensor can close display panel 841 when mobile phone is moved in one's ear
And/or backlight.As a kind of motion sensor, accelerometer sensor can detect (generally three axis) acceleration in all directions
Size, can detect that size and the direction of gravity when static, can be used to identify the application of mobile phone posture, (for example horizontal/vertical screen is cut
Change, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap) etc.；May be used also as mobile phone
The other sensors such as gyroscope, barometer, hygrometer, thermometer, the infrared sensor of configuration, details are not described herein.
Voicefrequency circuit 860, loudspeaker 861, microphone 862 can provide the audio interface between user and mobile phone.Audio-frequency electric
Electric signal after the audio data received conversion can be transferred to loudspeaker 861, be converted to sound by loudspeaker 861 by road 860
Signal output；On the other hand, the voice signal of collection is converted to electric signal by microphone 862, is turned after being received by voicefrequency circuit 860
It is changed to audio data, then by after the processing of audio data output processor 880, such as another mobile phone is sent to through RF circuit 810,
Or audio data is exported to memory 820 to be further processed.
WiFi belongs to short range wireless transmission technology, and mobile phone can help user's transceiver electronics postal by WiFi module 870
Part, browsing webpage and access streaming video etc., it provides wireless broadband internet access for user.Although Fig. 8 is shown
WiFi module 870, but it is understood that, and it is not belonging to must be configured into for mobile phone, it can according to need do not changing completely
Become in the range of the essence of invention and omits.
Processor 880 is the control centre of mobile phone, using the various pieces of various interfaces and connection whole mobile phone, is led to
It crosses operation or executes the software program and/or module being stored in memory 820, and call and be stored in memory 820
Data execute the various functions and processing data of mobile phone, to carry out integral monitoring to mobile phone.Optionally, processor 880 can wrap
Include one or more processing units；Preferably, processor 880 can integrate application processor and modem processor, wherein answer
With the main processing operation system of processor, user interface and application program etc., modem processor mainly handles wireless communication.
It is understood that above-mentioned modem processor can not also be integrated into processor 880.
Mobile phone further includes the power supply 890 (such as battery) powered to all parts, it is preferred that power supply can pass through power supply pipe
Reason system and processor 880 are logically contiguous, to realize management charging, electric discharge and power managed by power-supply management system
Etc. functions.
Although being not shown, mobile phone can also include camera, bluetooth module etc., and details are not described herein.
In embodiments of the present invention, processor 880 included by the terminal, which also has, makes user equipment execute Fig. 3 and Fig. 5
Method in corresponding embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (19)
1. a kind of method of channel estimation, which is characterized in that be applied to communication system, the communication system includes NpA antenna end
Mouthful, the NpA antenna port is multiplexed identical running time-frequency resource and transmits pilot signal, the NpFor the positive integer more than or equal to 2, institute
The method of stating includes:
Extract the pilot signal received in signal；
To the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, the pilot signal for filter coefficients is obtained；
Determine each antenna port is used for filter coefficients coefficient corresponding to filter coefficients；
The corresponding filter coefficients system of each antenna port according to the vector sum of the pilot signal for filter coefficients
Number, calculates the channel response estimated value of each antenna port；
It is described to the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, obtain for filter coefficients pilot signal it
Afterwards, before the filter coefficients coefficient for determining different antennae port, the method also includes:
To the NpThe pilot signal corresponding to each port in a antenna port carries out N 'occExponent part despreading, and N 'occ
Less than Nocc, NpLess than or equal to Nocc, the NoccFor NpA antenna port is multiplexed the original order of identical running time-frequency resource, described
N′occ, NoccAnd NpIt is positive integer.
2. the method according to claim 1, wherein to the NpCorresponding to each port in a antenna port
The pilot signal carries out N 'occExponent part despreading, comprising:
By the port p of Partly despreadiThe pilot signal for filter coefficients can indicate are as follows:
Wherein, N 'occFor Partly despread order,Indicate the pilot signal for being used for filter coefficients, (k 'p,l′p) it is that part solves
The time-frequency domain coordinate of corresponding equivalent resources element after expansion,For for obtaining equivalent resources element (k 'p,l′p) at portion
The time-frequency domain coordinate needed for the pilot signal expanded for the pilot signal of filter coefficients is decomposed,For port piPilot tone
Signal is in resource elementThe spreading code of position.
3. the method according to claim 1, wherein each antenna port of the determination is right for filter coefficients
The filter coefficients coefficient answered, comprising:
The filter coefficients coefficient is obtained by two-dimentional wiener criterion:
Wherein, R'HHChannel response for resource element (k, l) to be estimated and each pilot tone by Partly despread for filter coefficients
Channel cross correlation vector between the channel response of resource element；RHHFor each pilot tone by Partly despread for filter coefficients
Channel correlation matrix between the channel response of resource element；For by port piWith port p'jPass through Partly despread
The matrix that spreading code afterwards is constituted；For the port p receivediPilot signal power；For the port received
p'jPilot signal power；N′occFor the order of Partly despread, N 'pFor remaining antenna port number after Partly despread
Amount.
4. method according to claim 1-3, which is characterized in that the leading for filter coefficients according to
The corresponding filter coefficients coefficient of each antenna port described in the vector sum of frequency signal, the channel response for calculating each antenna port are estimated
Evaluation, comprising:
The channel response estimated value of antenna port is calculated by following formula:
Wherein,For for filter coefficients by portion
The vector of the pilot signal expanded is decomposed,Indicate the resource element mark that response is occupied by the pilot signal of Partly despread
Number；T indicates transposition,For antenna port piCorresponding filter coefficients coefficient.
5. a kind of method of channel estimation, which is characterized in that be applied to communication system, the communication system includes NpA antenna end
Mouthful, the NpA antenna port is multiplexed identical running time-frequency resource and transmits pilot signal, the NpFor the positive integer more than or equal to 2, institute
The method of stating includes:
Extract the pilot signal received in signal；
To the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, the pilot signal for filter coefficients is obtained；
Determine each antenna port is used for filter coefficients coefficient corresponding to filter coefficients；
The corresponding filter coefficients system of each antenna port according to the vector sum of the pilot signal for filter coefficients
Number, calculates the channel response estimated value of each antenna port；
It is described extract receive signal in pilot signal include:
Pilot signal in the reception signal is indicated with following formula:
Wherein,For port piCorresponding channel response；For port piPilot signal in resource element (kp,lp)
The spreading code of position, (kp,lp) for indicating the time-frequency domain coordinate of resource element shared by pilot tone,For frequency pilot sign；For noise；NpFor the antenna port number being actually multiplexed.
6. according to the method described in claim 5, it is characterized in that, described multiple with corresponding pilot frequency sequence to the pilot signal
Conjugate multiplication, obtain include: for the pilot signal of filter coefficients
It is described to the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, obtain logical for the pilot signal of filter coefficients
Crossing following formula indicates:
Wherein, (kp, lp) for indicating the resource element coordinate of pilot signal；Indicate that the pilot tone for filter coefficients is believed
Number,For pilot frequency sequence complex conjugate；
According to describedObtain the vector of the pilot signal for filter coefficients.
7. method according to claim 5 or 6, which is characterized in that described to believe according to for the pilot tone of filter coefficients
The corresponding filter coefficients coefficient of each antenna port described in number vector sum, calculates the channel response estimated value packet of each antenna port
It includes:
The channel response estimated value of antenna port is calculated by following formula:
Wherein,For for obtaining channel response at resource element (k, l)
The vector of the pilot signal of filter coefficients needed for estimated value,Indicate the resource element mark that corresponding pilot signal occupies
Number；T indicates transposition；For antenna port piCorresponding filter coefficients coefficient.
8. a kind of method of channel estimation, which is characterized in that be applied to communication system, the communication system includes NpA antenna end
Mouthful, the NpA antenna port is multiplexed identical running time-frequency resource and transmits pilot signal, the NpFor the positive integer more than or equal to 2, institute
The method of stating includes:
Extract the pilot signal received in signal；
To the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication, the pilot signal for filter coefficients is obtained；
Determine each antenna port is used for filter coefficients coefficient corresponding to filter coefficients；
The corresponding filter coefficients system of each antenna port according to the vector sum of the pilot signal for filter coefficients
Number, calculates the channel response estimated value of each antenna port；
Each antenna port of determination includes: for filter coefficients coefficient corresponding to filter coefficients
The filter coefficients coefficient is obtained by two-dimentional wiener criterion:
Wherein, R'HHChannel response and the channel of each pilot resource element for filter coefficients for resource element (k, l) to be estimated
Channel cross correlation vector between response；RHHFor the channel between the channel response for each pilot resource element of filter coefficients
Cross-correlation matrix；For the port p receivedjPilot signal power；For the port p receivediPilot signal
Power；For by port piWith port pjThe matrix that constitutes of spreading code, m row n column element isThat is resource element shared by pilot toneWithCorresponding port piWith port pjExpansion
The product of frequency code；Representing matrix dot product；For noise power, I indicates unit matrix；NpFor the antenna port number being actually multiplexed
Amount.
9. according to the method described in claim 8, it is characterized in that, it is described according to for filter coefficients pilot signal to
The amount filter coefficients coefficient corresponding with each antenna port, the channel response estimated value for calculating each antenna port include:
The channel response estimated value of antenna port is calculated by following formula:
Wherein,For for obtaining channel response at resource element (k, l)
The vector of the pilot signal of filter coefficients needed for estimated value,Indicate the resource element mark that corresponding pilot signal occupies
Number；T indicates transposition；For antenna port piCorresponding filter coefficients coefficient.
10. a kind of device of channel estimation, which is characterized in that be applied to communication system, the communication system includes NpA antenna end
Mouthful, the NpA antenna port is multiplexed identical running time-frequency resource and transmits pilot signal, the NpFor the positive integer more than or equal to 2, institute
Stating device includes:
Extraction module, for extracting the pilot signal received in signal；
First computing module, the pilot signal for being extracted to the extraction module and corresponding pilot frequency sequence complex conjugate phase
Multiply, obtains the pilot signal for filter coefficients；
Determining module, for determine each antenna port for filter coefficients coefficient corresponding to filter coefficients；
Second computing module, the vector sum of the pilot signal for filter coefficients for being calculated according to first computing module
The corresponding filter coefficients coefficient of each antenna port that the determining module determines, the channel for calculating each antenna port are rung
Answer estimated value；
The device, further includes:
Module is de-spread, for the NpThe pilot signal corresponding to each port in a antenna port carries out N 'occRank portion
It decomposes and expands, and N 'occLess than Nocc, NpLess than or equal to Nocc, the NoccFor NpA antenna port is multiplexed the original of identical running time-frequency resource
Beginning order, the N 'occ, NoccAnd NpIt is positive integer.
11. device according to claim 10, which is characterized in that
By the port p of Partly despreadiThe pilot signal for filter coefficients can indicate are as follows:
Wherein, N 'occFor Partly despread order,Indicate the pilot signal for being used for filter coefficients, (k 'p,l′p) it is that part solves
The time-frequency domain coordinate of corresponding equivalent resources element after expansion,For for obtaining equivalent resources element (k 'p,l′p) at portion
The time-frequency domain coordinate needed for the pilot signal expanded for the pilot signal of filter coefficients is decomposed,For port piPilot tone
Signal is in resource elementThe spreading code of position.
12. device according to claim 10, which is characterized in that
The determining module is also used to obtain the filter coefficients coefficient by two-dimentional wiener criterion:
Wherein, R'HHChannel response for resource element (k, l) to be estimated and each pilot tone by Partly despread for filter coefficients
Channel cross correlation vector between the channel response of resource element；RHHFor each pilot tone by Partly despread for filter coefficients
Channel correlation matrix between the channel response of resource element；For by port piWith port p'jPass through Partly despread
The matrix that spreading code afterwards is constituted；For the port p receivediPilot signal power；For the port received
p'jPilot signal power；N′occFor the order of Partly despread, N 'pFor remaining antenna port number after Partly despread
Amount.
13. the described in any item devices of 0-12 according to claim 1, which is characterized in that
Second computing module is also used to calculate antenna port by following formula and rings in the channel of the pilot positions
Answer estimated value:
Wherein,For for filter coefficients by portion
The vector of the pilot signal expanded is decomposed,Indicate the resource element mark that response is occupied by the pilot signal of Partly despread
Number；T indicates transposition,For antenna port piCorresponding filter coefficients coefficient.
14. a kind of device of channel estimation, which is characterized in that be applied to communication system, the communication system includes NpA antenna end
Mouthful, the NpA antenna port is multiplexed identical running time-frequency resource and transmits pilot signal, the NpFor the positive integer more than or equal to 2, institute
Stating device includes:
Extraction module, for extracting the pilot signal received in signal；
First computing module, the pilot signal for being extracted to the extraction module and corresponding pilot frequency sequence complex conjugate phase
Multiply, obtains the pilot signal for filter coefficients；
Determining module, for determine each antenna port for filter coefficients coefficient corresponding to filter coefficients；
Second computing module, the vector sum of the pilot signal for filter coefficients for being calculated according to first computing module
The corresponding filter coefficients coefficient of each antenna port that the determining module determines, the channel for calculating each antenna port are rung
Answer estimated value；
Pilot signal in the reception signal is indicated with following formula:
Wherein,For port piCorresponding channel response；For port piPilot signal in resource element (kp,lp)
The spreading code of position, (kp,lp) for indicating the time-frequency domain coordinate of resource element shared by pilot tone,For frequency pilot sign；For noise；NpFor the antenna port number being actually multiplexed.
15. device according to claim 14, which is characterized in that
First computing module is also used to be used for the pilot signal and corresponding pilot frequency sequence complex conjugate multiplication
The pilot signal of filter coefficients is indicated by following formula:
Wherein, (kp, lp) for indicating the resource element coordinate of pilot signal；Indicate that the pilot tone for filter coefficients is believed
Number,For pilot frequency sequence complex conjugate；
According to describedObtain the vector of the pilot signal for filter coefficients.
16. device according to claim 14 or 15, which is characterized in that the second computing module is also used to by following public
Formula calculates the channel response estimated value of each antenna port:
Wherein,For for obtaining channel response at resource element (k, l)
The vector of the pilot signal of filter coefficients needed for estimated value,Indicate the resource element mark that response pilot signal occupies
Number；T indicates transposition；For antenna port piCorresponding filter coefficients coefficient.
17. a kind of device of channel estimation, which is characterized in that be applied to communication system, the communication system includes NpA antenna end
Mouthful, the NpA antenna port is multiplexed identical running time-frequency resource and transmits pilot signal, the NpFor the positive integer more than or equal to 2, institute
Stating device includes:
Extraction module, for extracting the pilot signal received in signal；
First computing module, the pilot signal for being extracted to the extraction module and corresponding pilot frequency sequence complex conjugate phase
Multiply, obtains the pilot signal for filter coefficients；
Determining module, for determine each antenna port for filter coefficients coefficient corresponding to filter coefficients；
Second computing module, the vector sum of the pilot signal for filter coefficients for being calculated according to first computing module
The corresponding filter coefficients coefficient of each antenna port that the determining module determines, the channel for calculating each antenna port are rung
Answer estimated value；
The determining module is also used to obtain the filtered difference coefficient by two-dimentional wiener criterion:
Wherein, R'HHChannel response and the channel of each pilot resource element for filter coefficients for resource element (k, l) to be estimated
Channel cross correlation vector between response；RHHFor the channel between the channel response for each pilot resource element of filter coefficients
Cross-correlation matrix；For the port p receivedjPilot signal power；For the port p receivediPilot signal
Power；For by port piWith port pjThe matrix that constitutes of spreading code, m row n column element isThat is resource element shared by pilot toneWithCorresponding port piWith port pjExpansion
The product of frequency code；Representing matrix dot product；For noise power, I indicates unit matrix；NpFor the antenna port number being actually multiplexed
Amount.
18. device according to claim 17, which is characterized in that the second computing module is also used to through following formula meter
Calculate the channel response estimated value of each antenna port:
Wherein,For for obtaining channel response at resource element (k, l)
The vector of the pilot signal of filter coefficients needed for estimated value,Indicate the resource element mark that response pilot signal occupies
Number；T indicates transposition；For antenna port piCorresponding filter coefficients coefficient.
19. a kind of user equipment characterized by comprising
Memory, for storing computer executable program code；
Transceiver, and
Processor, with the memory and the transceiver couples；
Wherein said program code includes instruction, and when the processor executes described instruction, described instruction sets the user
It is standby to execute method as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489550.3A CN106209699B (en) | 2016-06-28 | 2016-06-28 | A kind of method and relevant device of channel estimation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489550.3A CN106209699B (en) | 2016-06-28 | 2016-06-28 | A kind of method and relevant device of channel estimation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106209699A CN106209699A (en) | 2016-12-07 |
| CN106209699B true CN106209699B (en) | 2019-06-18 |
Family
ID=57462175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610489550.3A Expired - Fee Related CN106209699B (en) | 2016-06-28 | 2016-06-28 | A kind of method and relevant device of channel estimation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106209699B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018215050A1 (en) * | 2017-05-23 | 2018-11-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Estimation of channel conditions |
| CN109688075B (en) * | 2019-01-16 | 2021-08-03 | 武汉虹信科技发展有限责任公司 | Channel estimation method and device for wireless communication |
| CN115865109A (en) * | 2022-11-11 | 2023-03-28 | 北京智芯微电子科技有限公司 | Interference suppression combining method, device and medium for multiple receiving antennas and receiving terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158437A (en) * | 2010-02-11 | 2011-08-17 | 富士通株式会社 | Equipment and method for computing channel frequency-domain correlation |
| CN102271102A (en) * | 2010-06-03 | 2011-12-07 | 大唐移动通信设备有限公司 | Channel estimating method and equipment based on sliding window |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5410812B2 (en) * | 2009-03-31 | 2014-02-05 | 三星電子株式会社 | Wireless communication apparatus, wireless communication system, and direct wave reception timing detection method |
-
2016
- 2016-06-28 CN CN201610489550.3A patent/CN106209699B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158437A (en) * | 2010-02-11 | 2011-08-17 | 富士通株式会社 | Equipment and method for computing channel frequency-domain correlation |
| CN102271102A (en) * | 2010-06-03 | 2011-12-07 | 大唐移动通信设备有限公司 | Channel estimating method and equipment based on sliding window |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106209699A (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109803253B (en) | Signal transmission method, terminal and network equipment | |
| CN110034904B (en) | Phase tracking reference signal association indication and sending method, network equipment and terminal | |
| CN109598777A (en) | Image rendering method, device, equipment and storage medium | |
| CN109660324A (en) | Demodulated reference signal transmissions method, the network equipment and terminal | |
| CN106209699B (en) | A kind of method and relevant device of channel estimation | |
| CN105612779B (en) | It is detected using mobile pilot transmission beam forming | |
| CN110022195A (en) | Measurement method, measuring configuration method, terminal and the network equipment | |
| CN107317665B (en) | A kind of co-channel full duplex system and mobile terminal simultaneously | |
| CN109525999B (en) | DMRS (demodulation reference signal) determining method, configuration method, terminal and base station | |
| US20150022405A1 (en) | Method, device and storage medium for controlling antenna | |
| CN109617587A (en) | Antenna selecting method and terminal | |
| CN110505695A (en) | Transmitting uplink data indicating means, terminal and network side equipment | |
| CN111614450B (en) | Indication method of terminal antenna panel information, network side equipment and terminal | |
| CN109842471B (en) | Transmission method of demodulation reference signal DMRS, network equipment and terminal | |
| KR20190049864A (en) | Resource mapping method, transmitting end and receiving end | |
| CN107889243A (en) | A kind of method of data transfer, relevant apparatus and system | |
| CN110022194A (en) | Method for mapping resource, network side equipment and terminal | |
| CN110034872A (en) | The incidence relation indicating means of resource and QCL determine method and relevant device | |
| CN109802902A (en) | A kind of Physical Resource Block binding size determines method, terminal device and the network equipment | |
| CN105792358A (en) | Channel obtaining signal configuring and generating method and device | |
| CN109673049B (en) | PBCH signal transmission method, base station and user terminal | |
| CN111278115A (en) | Transmission method, configuration method and related equipment | |
| CN110324129A (en) | A kind of ascending transmission method and terminal | |
| CN103929279A (en) | Detection method and device of multiple-input multiple-output system | |
| CN110890950B (en) | Signal processing method, access network equipment and terminal equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190618 Termination date: 20210628 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |