CN107888250A - Transmission method, method of estimation and the communication equipment of phase noise compensation reference signal - Google Patents
Transmission method, method of estimation and the communication equipment of phase noise compensation reference signal Download PDFInfo
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- CN107888250A CN107888250A CN201610873942.XA CN201610873942A CN107888250A CN 107888250 A CN107888250 A CN 107888250A CN 201610873942 A CN201610873942 A CN 201610873942A CN 107888250 A CN107888250 A CN 107888250A
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- reference signal
- phase noise
- noise compensation
- precoding
- compensation reference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/084—Equal gain combining, only phase adjustments
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
Abstract
The present invention provides a kind of transmission method, method of estimation and the communication equipment of phase noise compensation reference signal, and the transmission method of the phase noise compensation reference signal includes：Determine N number of phase noise compensation reference signal, the corresponding reference signal port of each phase noise compensation reference signal, each phase noise compensation reference signal corresponds to one or more transmitting antennas or antenna port, and the number of transmitting antenna or antenna port is Nt, N≤Nt；Precoding is carried out to demodulated reference signal corresponding to data flow to be sent and the data flow, obtains the data flow after precoding and demodulated reference signal, and the data flow after precoding and demodulated reference signal are mapped into NtIt is transmitted on individual transmitting antenna or antenna port, and N number of phase noise compensation reference signal is mapped into NtIt is transmitted on individual transmitting antenna or antenna port；Precoding matrix information used by precoding is informed into receiving terminal.The solution of the present invention can accurately estimate the phase noise of every transceiving radio frequency passage.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of transmission method of phase noise compensation reference signal, phase
Method of estimation, emitter, receiver and the communication equipment of position noise.
Background technology
Phase noise comes from emitter and the local oscillator in receiver, and its transmission for multi-carrier signal will produce
It is raw to influence.And more serious it will be made an uproar in high band (more than 6GHz), the influence of phase noise, it is necessary to carry out phase to reception signal
The compensation of sound is to ensure systematic function.By introducing phase noise compensation reference signal in transmitting terminal, it is ensured that receiving terminal energy
Enough enter the phase noise estimation of line link, and reception signal is compensated.
Because LTE (Long Term Evolution, Long Term Evolution) system is applied to low-frequency range, therefore without corresponding
Phase noise compensation reference signal design.In the 5G agreements of Verizon issues, it is proposed that a kind of phase noise compensation is with reference to letter
Number transmission method, as depicted in figs. 1 and 2.Fig. 1 is the time-frequency location signal of the phase noise compensation reference signal of downlink transfer
Figure, Fig. 2 are the time-frequency location schematic diagrames of the phase noise compensation reference signal of uplink, in Fig. 1 and Fig. 2, the volume of abscissa
Number be OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol numbering,
The numbering of ordinate is the numbering of subcarrier, and p represents port numbers, and the different grid of filling striped represents different port.From Fig. 1
As can be seen that during downlink transfer, the port of each phase noise compensation reference signal takes a subcarrier, in a subframe
Continuously transmit.Base station informs the port number of the phase noise compensation reference signal used in user's transmission by dynamic signaling,
2 port transmissions, 1 port transmission can be used or do not transmitted.From figure 2 it can be seen that each phase noise compensation ginseng
The port for examining signal takes a subcarrier, and every transmission among a subframe.User informs base by up dynamic signaling
The port number for the phase noise compensation signal stood used in transmission, can use 1 port or 2 ports.Phase noise
Compensated reference signal is similar with demodulated reference signal (Demodulation Reference Signal, DMRS), in transmission user
Used during data, and need to be transmitted after precoding.
In multiple input multiple output, there is a plurality of transceiving radio frequency passage in transmitting terminal and receiving terminal.For OFDM multicarriers
Communication, when phase noise be present, the transmission such as following formula of user data describes：
Wherein, subscript k, l represent k-th of subcarrier of l-th of symbol, Yk,lFor reception signal, it is a Nr× 1
Column vector, NrFor reception antenna number；For the phase noise of receiver, it is a Nr×NrDiagonal matrix, each list of elements
Show the phase noise on a reception antenna；Hk,lFor a Nr×NtChannel matrix, NtFor transmitting antenna number；For transmitting
The phase noise of machine, it is a Nt×NtDiagonal matrix, the phase noise on each one transmitting antenna of element representation；Wk,lFor
Nt×NsPre-coding matrix, Xk,lTo send signal, it is a Ns× 1 column vector, represent NsIndividual data flow parallel transmission.
Further, phase noise matrix can be expressed as：
In general, it is assumed that channel Hk,lWith precoding Wk,lKeep constant in a subframe.Only phase noise is in subframe
Each symbol change.In such scheme, phase noise compensation reference signal passes through precoding Wk,lIt is transmitted, it is used
In estimation composite channelChannel variation.Phase on each antenna of transmitting terminal and receiving terminal is made an uproar
When sound is identical, i.e.,AndWhen, this scheme could accurately estimate the change of channel
Change.If transmitting terminal or the phase noise of receiving terminal different antennae have not simultaneously asIn element occur not
Same phase place change, the phase noise compensation reference signal after precoding can not obtain the phase of every transceiving radio frequency passage
Noise, so as to can not accurately estimate the channel variation of composite channel.
The content of the invention
In view of this, the present invention provides a kind of estimation of the transmission method, phase noise of phase noise compensation reference signal
Method, emitter, receiver and communication equipment, it is difficult using existing phase noise compensation reference signal transmission method to solve
The problem of accurately to estimate the phase noise of every transceiving radio frequency passage.
In order to solve the above technical problems, the present invention provides a kind of transmission method of phase noise compensation reference signal, including：
N number of phase noise compensation reference signal is determined, wherein, each corresponding ginseng of the phase noise compensation reference signal
Signal port is examined, and each phase noise compensation reference signal corresponds to one or more transmitting antennas or antenna port, institute
The number for stating transmitting antenna or antenna port is Nt, N≤Nt, N and NtIt is positive integer；
Precoding is carried out to demodulated reference signal corresponding to data flow to be sent and the data flow, after obtaining precoding
Data flow and demodulated reference signal, and the data flow after precoding and demodulated reference signal are mapped into the NtIndividual transmitting antenna
Or be transmitted on antenna port, and N number of phase noise compensation reference signal is mapped into the NtIndividual transmitting antenna
Or it is transmitted on antenna port；
Precoding matrix information used by precoding is informed into receiving terminal.
Preferably, transmitting antenna described in phase noise identical shares the same reference signal port.
Preferably, N number of phase noise compensation reference signal is mapped into the NtIndividual transmitting antenna or antenna port
On the step of being transmitted include：
When N is equal to NtWhen, N number of phase noise compensation reference signal is mapped into corresponding each transmitting one by one
It is transmitted on antenna or antenna port；
When N is less than NtWhen, the institute for the same reference signal port that multiple transmitting antennas or antenna port are shared
State phase noise compensation reference signal and map to the multiple transmitting antenna or antenna port and be transmitted.
Preferably, the data flow after precoding and demodulated reference signal are mapped into the NtIndividual transmitting antenna or antenna end
When being transmitted on mouthful, the demodulated reference signal after the precoding uses NsIndividual reference signal port, wherein, NsIt is data flow
Number.
Preferably, the precoding matrix information is index information of the pre-coding matrix in the predefined code book of system,
Or the numerical value of each element for pre-coding matrix.
The present invention also provides a kind of method of estimation of phase noise, including：
Receive phase noise compensation reference signal, precoding matrix information, the data flow after precoding that transmitting terminal is sent
And demodulated reference signal；
Using the demodulated reference signal, the composite channel information of symbol where estimating the demodulated reference signal；
Using the phase noise compensation reference signal, the letter of symbol where estimating the phase noise compensation reference signal
Road information, and according to the channel information and precoding matrix information, obtain according with where the phase noise compensation reference signal
Number composite channel information；
By the composite channel information of symbol where the phase noise compensation reference signal and the demodulated reference signal institute
Compare in the composite channel information of symbol, symbol where drawing the phase noise compensation reference signal is joined relative to the demodulation
The phase place change of symbol where examining signal.
Preferably, it is described according to the channel information and precoding matrix information, obtain the phase noise compensation reference
Include where signal the step of the composite channel information of symbol：
Pre-coding matrix is obtained according to the precoding matrix information；
The channel information is multiplied with the pre-coding matrix, obtains according with where the phase noise compensation reference signal
Number composite channel information.
Preferably, the precoding matrix information is index information of the pre-coding matrix in the predefined code book of system,
Or the numerical value of each element for pre-coding matrix.
The present invention also provides a kind of emitter, including：
Determining unit, for determining N number of phase noise compensation reference signal, wherein, each phase noise compensation ginseng
The corresponding reference signal port of signal is examined, and each phase noise compensation reference signal corresponds to one or more transmitting antennas
Or antenna port, the number of the transmitting antenna or antenna port is Nt, N≤Nt, N and NtIt is positive integer；
Transmission unit, for carrying out precoding to demodulated reference signal corresponding to data flow to be sent and the data flow,
The data flow after precoding and demodulated reference signal are obtained, and the data flow after precoding and demodulated reference signal are mapped into institute
State NtIt is transmitted on individual transmitting antenna or antenna port, and N number of phase noise compensation reference signal is mapped into institute
State NtIt is transmitted on individual transmitting antenna or antenna port；
Informing unit, for precoding matrix information used by precoding to be informed into receiving terminal.
Preferably, transmitting antenna described in phase noise identical shares the same reference signal port.
Preferably, the transmission unit includes：
First mapping subelement, for being equal to N as NtWhen, N number of phase noise compensation reference signal is mapped one by one
It is transmitted on to the corresponding each transmitting antenna or antenna port；
Second mapping subelement, for being less than N as NtWhen, same institute that multiple transmitting antennas or antenna port are shared
The phase noise compensation reference signal for stating reference signal port maps to the multiple transmitting antenna or antenna port progress
Transmission.
Preferably, the data flow after precoding and demodulated reference signal are mapped to the N by the transmission unittIndividual transmitting
When being transmitted on antenna or antenna port, the demodulated reference signal after the precoding uses NsIndividual reference signal port, its
In, NsIt is the number of data flow.
Preferably, the precoding matrix information is index information of the pre-coding matrix in the predefined code book of system,
Or the numerical value of each element for pre-coding matrix.
The present invention also provides a kind of receiver, including：
Receiving unit, for receiving the phase noise compensation reference signal of transmitting terminal transmission, precoding matrix information, prelisting
Data flow and demodulated reference signal after code；
First estimation unit, for utilizing the demodulated reference signal, estimate symbol where the demodulated reference signal
Composite channel information；
Second estimation unit, for utilizing the phase noise compensation reference signal, estimate the phase noise compensation ginseng
The channel information of symbol where examining signal；
3rd estimation unit, for according to the channel information and precoding matrix information, obtaining the phase noise and mending
The composite channel information of symbol where repaying reference signal；
Comparing unit, for by the composite channel information of symbol where the phase noise compensation reference signal and the solution
The composite channel information of symbol compares where adjusting reference signal, and symbol where drawing the phase noise compensation reference signal is relative
The phase place change of symbol where the demodulated reference signal.
Preferably, second estimation unit includes：
First processing subelement, for obtaining pre-coding matrix according to the precoding matrix information；
Multiplication subelement, for the channel information to be multiplied with the pre-coding matrix, obtain the phase noise and mend
The composite channel information of symbol where repaying reference signal.
Preferably, the precoding matrix information is index information of the pre-coding matrix in the predefined code book of system,
Or the numerical value of each element for pre-coding matrix.
The present invention also provides a kind of communication equipment, including above-mentioned emitter.
The present invention also provides a kind of communication equipment, including above-mentioned receiver.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
Compared with the transmission method of phase noise compensation reference signal of the prior art, in the embodiment of the present invention, not
Precoding is carried out to phase noise compensation reference signal, but phase noise compensation reference signal is directly mapped into transmitting antenna
Or be transmitted on antenna port, due to not carrying out precoding to phase noise compensation reference signal, thus receiving terminal is connecing
When receiving phase noise compensation reference signal, the phase noise compensation of every transceiving radio frequency passage can be distinguished exactly with reference to letter
Number, so as to accurately estimate the phase noise of every transceiving radio frequency passage, even if the different antennae of transmitting terminal or receiving terminal
Phase noise when having different, it can also ensure accurate phase noise estimation.
Brief description of the drawings
Fig. 1 is the time-frequency location schematic diagram of the phase noise compensation reference signal of downlink transfer of the prior art；
Fig. 2 is the time-frequency location schematic diagram of the phase noise compensation reference signal of uplink of the prior art；
Fig. 3 is the schematic flow sheet of the transmission method of the phase noise compensation reference signal of one embodiment of the invention；
Fig. 4 is the schematic flow sheet of the method for estimation of the phase noise of one embodiment of the invention；
Fig. 5 is the sub-frame configuration schematic diagram of the phase noise compensation reference signal of one embodiment of the invention；
Fig. 6 is the structured flowchart of the emitter of one embodiment of the invention；
Fig. 7 is the structured flowchart of the receiver of one embodiment of the invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in further detail.Following reality
Apply example to be used to illustrate the present invention, but be not limited to the scope of the present invention.
Corresponding to the transmitting terminal of phase noise compensation reference signal, Fig. 3 is refer to, the embodiment of the present invention provides a kind of phase
The transmission method of noise compensation reference signal, the transmission method of the phase noise compensation reference signal include：
Step 31：N number of phase noise compensation reference signal is determined, wherein, each phase noise compensation reference signal
A corresponding reference signal port, and each phase noise compensation reference signal corresponds to one or more transmitting antennas or antenna
Port, the number of the transmitting antenna or antenna port is Nt, N≤Nt, N and NtIt is positive integer；
Wherein, an antenna port corresponds to one or more transmitting antennas.
Step 32：Precoding is carried out to demodulated reference signal corresponding to data flow to be sent and the data flow, obtained pre-
Data flow and demodulated reference signal after coding, and the data flow after precoding and demodulated reference signal are mapped into the NtIt is individual
It is transmitted on transmitting antenna or antenna port.
Step 33：N number of phase noise compensation reference signal is mapped into the NtIndividual transmitting antenna or antenna port
On be transmitted；
Step 34：Precoding matrix information used by precoding is informed into receiving terminal.
In the embodiment of the present invention, the execution sequence of step 32, step 33 and step 34 is not defined, can basis
Need to determine the order performed.
Compared with the transmission method of phase noise compensation reference signal of the prior art, in the embodiment of the present invention, not
Precoding is carried out to phase noise compensation reference signal, but phase noise compensation reference signal is directly mapped into transmitting antenna
Or be transmitted on antenna port, due to not carrying out precoding to phase noise compensation reference signal, thus receiving terminal is connecing
When receiving phase noise compensation reference signal, the phase noise compensation of every transceiving radio frequency passage can be distinguished exactly with reference to letter
Number, so as to accurately estimate the phase noise of every transceiving radio frequency passage, even if the different antennae of transmitting terminal or receiving terminal
Phase noise when having different, it can also ensure accurate phase noise estimation.
In some currently preferred embodiments of the present invention, transmitting antenna described in phase noise identical or antenna port can be shared
The same reference signal port.Certainly, in some other embodiment of the present invention, the different multiple transmitting days of phase noise
Line or antenna port can also share the same reference signal port, such as the multiple transmitting antennas or day that phase noise is close
The same reference signal port of line ports share.
In the embodiment of the present invention, when the phase noise of each transmitting antenna or antenna port differs, N can be equal to
Nt, i.e. a transmitting antenna or the corresponding phase noise compensation reference signal of antenna port, each phase noise compensation refer to
The corresponding reference signal port of signal.When phase noise identical transmitting antenna or antenna port be present, N can still be equal to
Nt, i.e. a transmitting antenna or antenna port can also correspond to a phase noise compensation reference signal, or, when phase being present
When noise identical transmitting antenna or antenna port, phase noise identical transmitting antenna or the corresponding phase of antenna port are made an uproar
Sound compensated reference signal, that is, a reference signal ports port is shared, now, N is less than Nt.In addition, N can also be other numbers
Value, for example, system only needs to send phase noise compensation reference signal using 5 reference signal ports, now, N is equal to 5, when
When the number of reference signal port is smaller, the same or like transmitting antenna of phase noise or antenna port can share one end
Mouthful.
In the embodiment of the present invention, when transmitting phase noise compensation reference signal, when N is equal to NtWhen, N number of phase is made an uproar
Sound compensated reference signal is mapped on the corresponding each transmitting antenna or antenna port and is transmitted one by one；When N is less than Nt
When, the phase noise compensation reference for the same reference signal port that multiple transmitting antennas or antenna port are shared
Signal maps to the multiple transmitting antenna or antenna port and is transmitted.
In some currently preferred embodiments of the present invention, to prevent from interfering with each other, by N number of phase noise compensation reference signal
Map to the NtWhen being transmitted on individual transmitting antenna or antenna port, each reference signal port can take one
Subcarrier or multiple subcarriers.Certainly, the present invention some other embodiment in or multiple reference signals
Port takes a subcarrier or multiple subcarriers.
Taken in each reference signal port in the embodiment of a subcarrier, it is preferable that N number of phase noise
Compensated reference signal is located on adjacent N number of subcarrier, and adjacent N number of subcarrier approximate can have identical frequency domain channel special
Property.Certainly, in some other embodiment of the present invention, N number of phase noise compensation reference signal can also be non-conterminous, or
Person is at least partly non-conterminous.
In some currently preferred embodiments of the present invention, the data flow after precoding and demodulated reference signal are mapped into the Nt
When being transmitted on individual transmitting antenna or antenna port, the demodulated reference signal after the precoding uses NsIndividual reference signal end
Mouthful, wherein, NsIt is the number of data flow.
In some embodiments of the invention, transmitting terminal directly can send the numerical value of each element of pre-coding matrix
To receiving terminal, in order to reduce transmission cost, it is preferable that transmitting terminal can not also direct transmitting pre-encoding matrix each element
Numerical value, the identification information of pre-coding matrix can be sent to receiving terminal, receiving terminal pre-saves pre-coding matrix and it is corresponding
Identification information, when receiving terminal receives the identification information of pre-coding matrix, pre-coding matrix is determined according to identification information.
In some currently preferred embodiments of the present invention, the precoding matrix information can be that pre-coding matrix is pre- in system
Index information in the code book of definition.Now, receiving terminal pre-saves pre-coding matrix index information corresponding with its, works as reception
When termination receives the index information of pre-coding matrix, corresponding pre-coding matrix is found out from the code book according to index information.
In the embodiment of the present invention, the channel information of symbol can where the data flow and demodulated reference signal after the precoding
ThinkThe channel information of symbol can be where the phase noise compensation reference signalWherein, subscript k, l represent k-th of subcarrier of l-th of symbol,For the phase noise of receiving terminal, Hk,l
For channel matrix,For the phase noise of transmitting terminal, Wk,lFor pre-coding matrix.
Corresponding to the receiving terminal of phase noise compensation reference signal, Fig. 4 is refer to, the embodiment of the present invention provides a kind of phase
The method of estimation of noise, the method for estimation of the phase noise include：
Step 41：Receive phase noise compensation reference signal, precoding matrix information that transmitting terminal sends, after precoding
Data flow and demodulated reference signal；
Step 42：Using the demodulated reference signal, the composite channel of symbol where estimating the demodulated reference signal
Information；
Step 43：Using the phase noise compensation reference signal, the phase noise compensation reference signal place is estimated
The channel information of symbol, and according to the channel information and precoding matrix information, the phase noise compensation is obtained with reference to letter
The composite channel information of symbol where number；
In this step, N × N of symbol where phase noise compensation reference signal can be obtainedrThere is bar out of phase to make an uproar
The channel information of sound radio-frequency channel, NrFor reception antenna number.
Step 44：By the composite channel information of symbol where the phase noise compensation reference signal and the demodulation reference
The composite channel information of symbol compares where signal, and symbol is relative to described where drawing the phase noise compensation reference signal
The phase place change of symbol where demodulated reference signal.The phase place change is i.e. as caused by phase noise.
In the embodiment of the present invention, because transmitting terminal does not carry out precoding to phase noise compensation reference signal, thus connect
Receiving end when receiving phase noise compensation reference signal, mend by the phase noise that can distinguish every transceiving radio frequency passage exactly
Reference signal is repaid, so as to accurately estimate the phase noise of every transceiving radio frequency passage, even if transmitting terminal or receiving terminal
When the phase noise of different antennae has different, it can also ensure accurate phase noise estimation.
In above-described embodiment, the execution sequence of step 42 and step 43 does not limit, and can first carry out step 42, can also
First carry out step 43.
It is described according to the channel information and precoding matrix information in the embodiment of the present invention, obtain the phase noise
It can include the step of the composite channel information of symbol where compensated reference signal：
Step 431：Pre-coding matrix is obtained according to the precoding matrix information；
Step 432：The channel information is multiplied with the pre-coding matrix, obtains the phase noise compensation with reference to letter
The composite channel information of symbol where number.
Preferably, the channel information of symbol is where the phase noise compensation reference signalIts
In, subscript k, l represent k-th of subcarrier of l-th of symbol,For the phase noise of receiving terminal, Hk,lFor channel matrix,
It is described according to the channel information and precoding matrix information for the phase noise of transmitting terminal, obtain the phase noise compensation
Include where reference signal the step of the composite channel information of symbol：By symbol where the phase noise compensation reference signal
Channel informationWith pre-coding matrix Wk,lIt is multiplied, obtains the l where the phase noise compensation reference signal
In individual OFDM symbol, the composite channel information of k-th of subcarrier.
Preferably, the channel information of symbol is where the demodulated reference signalWherein,
Wk,lFor pre-coding matrix, the composite channel information by symbol where the phase noise compensation reference signal and the solution
The composite channel information of symbol compares where adjusting reference signal, and symbol where drawing the phase noise compensation reference signal is relative
Include in the step of phase place change of symbol where the demodulated reference signal：By where the phase noise compensation reference signal
Element in the composite channel information of symbol withIn element be correspondingly divided by and take phase, obtain each
Phase place change in data flow.
In some embodiments of the invention, transmitting terminal directly can send the numerical value of each element of pre-coding matrix
To receiving terminal, in order to reduce transmission cost, it is preferable that transmitting terminal can not also direct transmitting pre-encoding matrix each element
Numerical value, the identification information of pre-coding matrix can be sent to receiving terminal, receiving terminal pre-saves pre-coding matrix and it is corresponding
Identification information, when receiving terminal receives the identification information of pre-coding matrix, pre-coding matrix is determined according to identification information.
In some currently preferred embodiments of the present invention, the precoding matrix information can be that pre-coding matrix is pre- in system
Index information in the code book of definition.Now, receiving terminal pre-saves pre-coding matrix index information corresponding with its, works as reception
When termination receives the index information of pre-coding matrix, corresponding pre-coding matrix is found out from the code book according to index information.
Fig. 5 is refer to, Fig. 5 is the sub-frame configuration schematic diagram of the phase noise compensation reference signal of one embodiment of the invention,
In the embodiment of the present invention, in a subframe (subframe), demodulated reference signal (Demodulation RS) is located at first
OFDM symbol (OFDM symbol), using NsIndividual reference signal port transmitting, and each reference signal port takes a subcarrier
(subcarrier).The phase noise compensation of N number of reference signal port (port#0, port#1, port#2 ... ... port#N-1)
Reference signal (Phase noise compensation RS) is located at remaining OFDM symbol, wherein, each reference signal port accounts for
With a subcarrier, and, N number of phase noise compensation reference signal is located on adjacent subcarrier.Remainder is user data.
For transmitting terminal：
1) N=N is assumedt。
2) assume that transmitting terminal feeds back according to receiving terminal, it is determined that using pre-coding matrix WkTransmit user data and demodulation reference
Signal (due to pre-coding matrix in same subframe it is identical, so omitting OFDM symbol subscript in the embodiment of the present invention).Now
The channel that data flow and demodulated reference signal pass through isAnd the letter that phase noise compensation reference signal is passed through
Road isFurther it is represented by：
3) transmitting terminal will represent WkInformation inform receiving terminal.Preferably, transmitting terminal is by WkIn the predefined code book of system
Index information receiving terminal is informed by control channel.
For receiving terminal：
4) receiving terminal receives demodulated reference signal in first OFDM symbol, and estimates composite channelIn l-th of OFDM symbol (l >=2), the phase noise compensation reference signal of N number of port is received, and is estimated
Go out(the different N-port phase noise compensation reference signals in Fig. 7 are positioned at adjacent for each element in channel matrix
N number of subcarrier on, approximate can have identical frequency domain channel characteristic).Meanwhile receiving terminal receive control channel inform it is pre-
Encoder matrix index information, corresponding pre-coding matrix W is found in the codebookk.By what is estimatedChannel and Wk
Multiplication is obtained on l-th of OFDM, the composite channel information of k-th of subcarrierBy this channel information
Element and channel informationIn element be correspondingly divided by and take phase, you can to obtain in each data flow
Phase place change.
Corresponding to the transmission method of above-mentioned phase noise compensation reference signal, Fig. 6 is refer to, the embodiment of the present invention also provides
A kind of emitter, including：
Determining unit 61, for determining N number of phase noise compensation reference signal, wherein, each phase noise compensation
The corresponding reference signal port of reference signal, and the corresponding one or more transmitting days of each phase noise compensation reference signal
Line or antenna port, the number of the transmitting antenna or antenna port is Nt, N≤Nt, N and NtIt is positive integer；
Transmission unit 62, for being prelisted to demodulated reference signal corresponding to data flow to be sent and the data flow
Code, the data flow after precoding and demodulated reference signal are obtained, and the data flow after precoding and demodulated reference signal are mapped
To the NtIt is transmitted on individual transmitting antenna or antenna port, and N number of phase noise compensation reference signal is mapped
To the NtIt is transmitted on individual transmitting antenna or antenna port；
Informing unit 63, for precoding matrix information used by precoding to be informed into receiving terminal.
Preferably, transmitting antenna or antenna port described in phase noise identical share the same reference signal port.
Certainly, transmitting antenna described in phase noise identical or antenna port can not also share the same reference signal port.
Preferably, the transmission unit includes：
First mapping subelement, for being equal to N as NtWhen, N number of phase noise compensation reference signal is mapped one by one
It is transmitted on to the corresponding each transmitting antenna or antenna port；
Second mapping subelement, for being less than N as NtWhen, same institute that multiple transmitting antennas or antenna port are shared
The phase noise compensation reference signal for stating reference signal port maps to the multiple transmitting antenna or antenna port progress
Transmission.
Preferably, N number of phase noise compensation reference signal is mapped to the N by the transmission unittIndividual transmitting day
When being transmitted on line or antenna port, each reference signal port takes one or more subcarriers.Certainly, in this hair
In bright some other embodiment or multiple reference signal ports take a subcarrier or more height carry
Ripple.
Preferably, N number of phase noise compensation reference signal is located on adjacent subcarrier.Certainly, the present invention's
In some other embodiment, N number of phase noise compensation reference signal can also be non-conterminous, or at least partly non-conterminous.
Preferably, transmission unit maps to the data flow after precoding and demodulated reference signal described in the transmission unit
The NtWhen being transmitted on individual transmitting antenna or antenna port, the demodulated reference signal after the precoding uses NsIndividual reference
Signal port, wherein, NsIt is the number of data flow.
The precoding matrix information is index information of the pre-coding matrix in the predefined code book of system, or is pre-
The numerical value of each element of encoder matrix.
Preferably, the channel information of the data flow after the precoding and demodulated reference signal place symbol isThe channel information of symbol is where the phase noise compensation reference signalIts
In, subscript k, l represent k-th of subcarrier of l-th of symbol,For the phase noise of receiving terminal, Hk,lFor channel matrix,
For the phase noise of transmitting terminal, Wk,lFor pre-coding matrix.
Corresponding to the method for estimation of above-mentioned phase noise, Fig. 7 is refer to, the embodiment of the present invention also provides a kind of receiver,
Including：
Receiving unit 71, for receiving the phase noise compensation reference signal of transmitting terminal transmission, precoding matrix information, pre-
Data flow and demodulated reference signal after coding；
First estimation unit 72, for utilizing the demodulated reference signal, estimate symbol where the demodulated reference signal
Number composite channel information；
Second estimation unit 73, for utilizing the phase noise compensation reference signal, estimate the phase noise compensation
The channel information of symbol where reference signal；
3rd estimation unit 74, for according to the channel information and precoding matrix information, obtaining the phase noise
The composite channel information of symbol where compensated reference signal；
Comparing unit 75, for by the composite channel information of symbol where the phase noise compensation reference signal with it is described
The composite channel information of symbol compares where demodulated reference signal, draws symbol phase where the phase noise compensation reference signal
For the phase place change of symbol where the demodulated reference signal.
Preferably, second estimation unit 73 includes：
First processing subelement, for obtaining pre-coding matrix according to the precoding matrix information；
Multiplication subelement, for the channel information to be multiplied with the pre-coding matrix, obtain the phase noise and mend
The composite channel information of symbol where repaying reference signal.
Preferably, the channel information of symbol is where the phase noise compensation reference signalIts
In, subscript k, l represent k-th of subcarrier of l-th of symbol,For the phase noise of receiving terminal, Hk,lFor channel matrix,
For the phase noise of transmitting terminal, the multiplication subelement is by the channel information of symbol where the phase noise compensation reference signalWith pre-coding matrix Wk,lIt is multiplied, obtains l-th of OFDM symbols where the phase noise compensation reference signal
On number, the composite channel information of k-th of subcarrier.
Preferably, the channel information of symbol is where the demodulated reference signalWherein,
Wk,lFor pre-coding matrix, the comparing unit is by the composite channel information of symbol where the phase noise compensation reference signal
In element withIn element be correspondingly divided by and take phase, obtain phase in each data flow and become
Change.
The precoding matrix information is index information of the pre-coding matrix in the predefined code book of system, or is pre-
The numerical value of each element of encoder matrix.
The embodiment of the present invention also provides a kind of communication equipment, including above-mentioned emitter.
The embodiment of the present invention also provides a kind of communication equipment, including above-mentioned receiver.
Embodiments of the invention also provide a kind of data processing equipment, including：Processor；And pass through EBI and institute
State the memory that processor is connected, the memory be used to storing the processor perform operate when used program and
Data, when processor calls and performed the program and data stored in the memory, including realize following function mould
Block or unit：
Determining unit, for determining N number of phase noise compensation reference signal, wherein, each phase noise compensation ginseng
The corresponding reference signal port of signal is examined, and each phase noise compensation reference signal corresponds to one or more transmitting antennas
Or antenna port, the number of the transmitting antenna or antenna port is Nt, N≤Nt, N and NtIt is positive integer；
Transmission unit, for carrying out precoding to demodulated reference signal corresponding to data flow to be sent and the data flow,
The data flow after precoding and demodulated reference signal are obtained, and the data flow after precoding and demodulated reference signal are mapped into institute
State NtIt is transmitted on individual transmitting antenna or antenna port, and N number of phase noise compensation reference signal is mapped into institute
State NtIt is transmitted on individual transmitting antenna or antenna port；
Informing unit, for precoding matrix information used by precoding to be informed into receiving terminal.
It should be noted that the data processing equipment that the above embodiment of the present invention provides is can to correspond to realize above-mentioned phase
The device that the transmission method embodiment of noise compensation reference signal provides, therefore the phase noise compensation that above method embodiment provides
All embodiments of the transmission method of reference signal can be to should apply to the embodiment, and can reach same or analogous and have
Beneficial effect.
Embodiments of the invention also provide a kind of data processing equipment, including：Processor；And pass through EBI and institute
State the memory that processor is connected, the memory be used to storing the processor perform operate when used program and
Data, when processor calls and performed the program and data stored in the memory, including realize following function mould
Block or unit：
Receiving unit, for receiving the phase noise compensation reference signal of transmitting terminal transmission, precoding matrix information, prelisting
Data flow and demodulated reference signal after code；
First estimation unit, for utilizing the demodulated reference signal, estimate symbol where the demodulated reference signal
Composite channel information；
Second estimation unit, for utilizing the phase noise compensation reference signal, estimate the phase noise compensation ginseng
The channel information of symbol where examining signal；
3rd estimation unit, for according to the channel information and precoding matrix information, obtaining the phase noise and mending
The composite channel information of symbol where repaying reference signal；
Comparing unit, for by the composite channel information of symbol where the phase noise compensation reference signal and the solution
The composite channel information of symbol compares where adjusting reference signal, and symbol where drawing the phase noise compensation reference signal is relative
The phase place change of symbol where the demodulated reference signal.
It should be noted that the data processing equipment that the above embodiment of the present invention provides is can to correspond to realize above-mentioned phase
The device that the method for estimation embodiment of noise provides, therefore the method for estimation of the phase noise of above method embodiment offer is all
Embodiment can be to should apply to the embodiment, and can reach same or analogous beneficial effect.
In several embodiments provided herein, it should be understood that disclosed method and apparatus, can be by other
Mode realize.For example, device embodiment described above is only schematical, for example, the division of the unit, only
For a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine
Or another system is desirably integrated into, or some features can be ignored, or do not perform.Another, shown or discussed phase
Coupling or direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit
Connection, can be electrical, mechanical or other forms.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That the independent physics of unit includes, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server, or network equipment etc.) performs receiving/transmission method described in each embodiment of the present invention
Part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store
The medium of program code.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (18)
- A kind of 1. transmission method of phase noise compensation reference signal, it is characterised in that including：N number of phase noise compensation reference signal is determined, wherein, each phase noise compensation reference signal corresponding one is with reference to letter Number port, and each phase noise compensation reference signal corresponds to one or more transmitting antennas or antenna port, the hair The number for penetrating antenna or antenna port is Nt, N≤Nt, N and NtIt is positive integer；Precoding is carried out to demodulated reference signal corresponding to data flow to be sent and the data flow, obtains the data after precoding Stream and demodulated reference signal, and the data flow after precoding and demodulated reference signal are mapped into the NtIndividual transmitting antenna or day It is transmitted on line end mouth, and N number of phase noise compensation reference signal is mapped into the NtIndividual transmitting antenna or day It is transmitted on line end mouth；Precoding matrix information used by precoding is informed into receiving terminal.
- 2. the transmission method of phase noise compensation reference signal according to claim 1, it is characterised in that phase noise phase The same transmitting antenna shares the same reference signal port.
- 3. the transmission method of phase noise compensation reference signal according to claim 1, it is characterised in that will be described N number of Phase noise compensation reference signal maps to the NtThe step of being transmitted on individual transmitting antenna or antenna port includes：When N is equal to NtWhen, N number of phase noise compensation reference signal is mapped into corresponding each transmitting antenna one by one Or it is transmitted on antenna port；When N is less than NtWhen, the phase for the same reference signal port that multiple transmitting antennas or antenna port are shared Noise compensation reference signal maps to the multiple transmitting antenna or antenna port and is transmitted.
- 4. the transmission method of phase noise compensation reference signal according to claim 1, it is characterised in that after precoding Data flow and demodulated reference signal map to the NtWhen being transmitted on individual transmitting antenna or antenna port, the precoding Demodulated reference signal afterwards uses NsIndividual reference signal port, wherein, NsIt is the number of data flow.
- 5. the transmission method of phase noise compensation reference signal according to claim 1, it is characterised in that the precoding Matrix information is index information of the pre-coding matrix in the predefined code book of system, or each element for pre-coding matrix Numerical value.
- A kind of 6. method of estimation of phase noise, it is characterised in that including：Phase noise compensation reference signal, precoding matrix information, the data flow after precoding that transmitting terminal is sent is received to conciliate Adjust reference signal；Using the demodulated reference signal, the composite channel information of symbol where estimating the demodulated reference signal；Using the phase noise compensation reference signal, the channel letter of symbol where estimating the phase noise compensation reference signal Breath, and according to the channel information and precoding matrix information, symbol where obtaining the phase noise compensation reference signal Composite channel information；By the composite channel information of symbol where the phase noise compensation reference signal with being accorded with where the demodulated reference signal Number composite channel information compare, show that symbol where the phase noise compensation reference signal is believed relative to the demodulation reference The phase place change of symbol where number.
- 7. the method for estimation of phase noise according to claim 6, it is characterised in that it is described according to the channel information and Precoding matrix information, include where obtaining the phase noise compensation reference signal the step of composite channel information of symbol：Pre-coding matrix is obtained according to the precoding matrix information；The channel information is multiplied with the pre-coding matrix, symbol where obtaining the phase noise compensation reference signal Composite channel information.
- 8. the method for estimation of phase noise according to claim 6, it is characterised in that the precoding matrix information is pre- Index information of the encoder matrix in the predefined code book of system, or the numerical value of each element for pre-coding matrix.
- A kind of 9. emitter, it is characterised in that including：Determining unit, for determining N number of phase noise compensation reference signal, wherein, each phase noise compensation is with reference to letter Number reference signal port of correspondence one, and each phase noise compensation reference signal corresponds to one or more transmitting antennas or day Line end mouth, the number of the transmitting antenna or antenna port is Nt, N≤Nt, N and NtIt is positive integer；Transmission unit, for carrying out precoding to demodulated reference signal corresponding to data flow to be sent and the data flow, obtain Data flow and demodulated reference signal after precoding, and the data flow after precoding and demodulated reference signal are mapped into the Nt It is transmitted on individual transmitting antenna or antenna port, and N number of phase noise compensation reference signal is mapped into the Nt It is transmitted on individual transmitting antenna or antenna port；Informing unit, for precoding matrix information used by precoding to be informed into receiving terminal.
- 10. emitter according to claim 9, it is characterised in that transmitting antenna or antenna described in phase noise identical The same reference signal port of ports share.
- 11. emitter according to claim 9, it is characterised in that the transmission unit includes：First mapping subelement, for being equal to N as NtWhen, N number of phase noise compensation reference signal is mapped to correspondingly one by one The each transmitting antenna or antenna port on be transmitted；Second mapping subelement, for being less than N as NtWhen, the same ginseng that multiple transmitting antennas or antenna port are shared The phase noise compensation reference signal for examining signal port maps to the multiple transmitting antenna or antenna port and is transmitted.
- 12. emitter according to claim 11, it is characterised in that the transmission unit by the data flow after precoding and Demodulated reference signal maps to the NtWhen being transmitted on individual transmitting antenna or antenna port, the demodulation ginseng after the precoding Examine signal and use NsIndividual reference signal port, wherein, NsIt is the number of data flow.
- 13. emitter according to claim 11, it is characterised in that the precoding matrix information is that pre-coding matrix exists Index information in the predefined code book of system, or the numerical value of each element for pre-coding matrix.
- A kind of 14. receiver, it is characterised in that including：Receiving unit, for receiving the phase noise compensation reference signal of transmitting terminal transmission, precoding matrix information, after precoding Data flow and demodulated reference signal；First estimation unit, for utilizing the demodulated reference signal, the conjunction of symbol where estimating the demodulated reference signal Into channel information；Second estimation unit, for utilizing the phase noise compensation reference signal, estimate the phase noise compensation with reference to letter The channel information of symbol where number；3rd estimation unit, for according to the channel information and precoding matrix information, obtaining the phase noise compensation ginseng The composite channel information of symbol where examining signal；Comparing unit, for the composite channel information of symbol where the phase noise compensation reference signal and the demodulation to be joined The composite channel information of symbol compares where examining signal, and symbol is relative to institute where drawing the phase noise compensation reference signal The phase place change of symbol where stating demodulated reference signal.
- 15. receiver according to claim 14, it is characterised in that second estimation unit includes：First processing subelement, for obtaining pre-coding matrix according to the precoding matrix information；Multiplication subelement, for the channel information to be multiplied with the pre-coding matrix, obtain the phase noise compensation ginseng The composite channel information of symbol where examining signal.
- 16. receiver according to claim 14, it is characterised in that the precoding matrix information is that pre-coding matrix exists Index information in the predefined code book of system, or the numerical value of each element for pre-coding matrix.
- 17. a kind of communication equipment, it is characterised in that including the emitter as described in claim any one of 9-13.
- 18. a kind of communication equipment, it is characterised in that including the receiver as described in claim any one of 14-16.
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