CN108809395A - Method and apparatus for vehicle communication - Google Patents
Method and apparatus for vehicle communication Download PDFInfo
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- CN108809395A CN108809395A CN201710313856.8A CN201710313856A CN108809395A CN 108809395 A CN108809395 A CN 108809395A CN 201710313856 A CN201710313856 A CN 201710313856A CN 108809395 A CN108809395 A CN 108809395A
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- group code
- antenna port
- reference signal
- transmit antenna
- zoom factor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/068—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using space frequency diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0606—Space-frequency coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Embodiment of the disclosure is related to the method and apparatus for vehicle communication.For example, a kind of communication means includes：Based on discrete Fourier transform (DFT), precoding is carried out to sent data；To the data application Space Frequency Block Coding (SFBC) through precoding to generate the first group code and the second group code, the first group code is associated with the first transmit antenna port, and the second group code is associated with the second transmit antenna port；The first zoom factor associated with the first transmit antenna port and the second zoom factor associated with the second transmit antenna port are applied respectively to the first group code and the second group code；And the first group code and the second group code are mapped at least partly single carrier frequency division multiplexing (SC-FDMA) data symbol for being used for transmission data in transmission subframe, send the first group code and the second group code to be utilized respectively the first transmit antenna port and the second transmit antenna port in the transmission subframe.
Description
Technical field
Embodiment of the disclosure relates generally to wireless communication technique, more particularly, to the method for vehicle communication
And equipment.
Background technology
The communication of vehicle to extraneous (V2X) for example may include communication of the vehicle to vehicle (V2V), vehicle to pedestrian
(V2P) communication etc. of communication and vehicle to network (V2N).In V2X communications, it usually needs utilize transmission diversity technology
To improve link-quality and reliability." transmission diversity technology " described herein generally refers to will be with the hair of differential declines degree
The copy for the number of delivering letters is supplied to recipient to promote the technology of reception signal correctly detected.
The characteristic of V2X communications proposes particular/special requirement to transmission diversity scheme.For example, being communicated at V2X (especially V2V)
In, terminal device be likely to be in the movement of fair speed (for example, two vehicles moved towards on a highway, they
Relative velocity can be up to 280,000 ms/h, or even 500,000 ms/h).Doppler generated in the case
Effect may generate transmission diversity scheme and seriously affect.In addition, in the feelings for being related to single carrier frequency division multiplexing (SC-FDMA) transmission
Under condition (for example, V2X defined in the lateral links of LTE), it is expected that the peak-to-average power ratio (PAPR) for transmitting signal is remained to the greatest extent
May be low, to realize compared with high effect.
Invention content
The brief overview to each embodiment is shown below, to provide the basic reason to some aspects of various embodiments
Solution.Note that Summary is not intended to the main points of mark key element or the range of the various embodiments of description.Its unique mesh
Be some concepts are presented in simplified form, as to the aftermentioned preamble being discussed in greater detail.
In the disclosure in a first aspect, providing a kind of communication means.This method includes：Based on discrete Fourier transform
(DFT), precoding is carried out to sent data；To the data application Space Frequency Block Coding (SFBC) through precoding to generate first
Group code and the second group code, the first group code is associated with the first transmit antenna port, and the second group code and the second hair
It is associated to penetrate antenna port；Associated with the first transmit antenna port the is applied respectively to the first group code and the second group code
One zoom factor and the second zoom factor associated with the second transmit antenna port；And by the first group code and second group of symbol
It number is mapped at least partly single carrier frequency division multiplexing (SC-FDMA) data symbol for being used for transmission data in transmission subframe, with
The first transmit antenna port and the second transmit antenna port are utilized respectively in the transmission subframe to send the first group code and
Two group codes.
In the second aspect of the disclosure, a kind of communication means is provided.This method includes：Obtain the letter about zoom factor
Breath, which is applied to the data sent using transmit antenna port, and the data are based on Space Frequency Block Coding
(SFBC) it is generated；In response to receiving the reference signal for utilizing the transmit antenna port to send, determined based on reference signal
The parameter of channel associated with the transmit antenna port；And the parameter based on the zoom factor and channel, receive data.
In the third aspect of the disclosure, a kind of communication equipment is provided.The communication equipment includes：Processor, and storage
Device, the memory are stored with instruction, which makes the communication equipment when being executed by processor：Based on discrete Fourier transform
(DFT), precoding is carried out to sent data；To the data application Space Frequency Block Coding (SFBC) through precoding to generate first
Group code and the second group code, the first group code is associated with the first transmit antenna port, and the second group code and the second hair
It is associated to penetrate antenna port；Associated with the first transmit antenna port the is applied respectively to the first group code and the second group code
One zoom factor and the second zoom factor associated with the second transmit antenna port；And by the first group code and second group of symbol
It number is mapped at least partly single carrier frequency division multiplexing (SC-FDMA) data symbol for being used for transmission data in transmission subframe, with
The first transmit antenna port and the second transmit antenna port are utilized respectively in the transmission subframe to send the first group code and
Two group codes.
The fourth aspect of the disclosure provides a kind of communication equipment.The communication equipment includes：Processor and memory,
The memory is stored with instruction, which makes the communication equipment when being executed by processor：The information about zoom factor is obtained,
The zoom factor is applied to the data sent using transmit antenna port, and the data are based on Space Frequency Block Coding (SFBC) quilt
It generates；In response to receiving the reference signal for utilizing the transmit antenna port to send, determined and the transmitting based on reference signal
The parameter of the associated channel of antenna port；And the parameter based on the zoom factor and channel, receive data.
It should be appreciated that the content described in Summary is not intended to limit the key or again of the embodiment of the present disclosure
Feature is wanted, it is also non-for limiting the scope of the present disclosure.The other feature of the disclosure will be easy to understand by description below.
Description of the drawings
From following disclosure and claim, the purpose of the present invention, advantage and other features will become brighter
It is aobvious.Here merely for exemplary purpose, refer to the attached drawing provides the non restrictive description of preferred embodiment, in the accompanying drawings：
Fig. 1 shows the schematic diagram of the example communication system 100 for the method that can be implemented within embodiment of the disclosure；
Fig. 2 shows the flows for the method 200 implemented at the communication equipment for serving as sender in accordance with an embodiment of the present disclosure
Figure；
Fig. 3 shows the schematic diagram of the transmission diversity scheme according to one embodiment of the disclosure；
Fig. 4 shows the schematic diagram of transmission diversity scheme according to another embodiment of the present disclosure；
Fig. 5 shows the flow for the method 500 implemented at the communication equipment for serving as recipient in accordance with an embodiment of the present disclosure
Figure；
Fig. 6 shows the device 600 according to an embodiment of the present disclosure implemented at the communication equipment for serving as sender
Block diagram；
Fig. 7 shows the device 700 according to an embodiment of the present disclosure implemented at the communication equipment for serving as recipient
Block diagram；And
Fig. 8 shows the block diagram of communication equipment 800 according to an embodiment of the present disclosure.
In various figures, identical or corresponding label indicates identical or corresponding part.
Specific implementation mode
In the following description, many details are illustrated for purposes of illustration.However, those of ordinary skill in the art will recognize
The present invention can be realized without using these details by knowing.Therefore, the present invention is not intended to be limited to shown
Embodiment but the widest range consistent with principles and features described herein will be endowed.
It should be appreciated that term " first ", " second " etc. are used only for distinguishing an element and another element.And
Actually the first element can also be referred to as second element, and vice versa.In addition it should also be understood that " comprising ", "comprising" only by with
Illustrate stated feature, element, function or the presence of component, however is not precluded that there are one or more others
Feature, element, function or component.
For the ease of explaining, will wirelessly communicate herein, such as some realities of the present invention are introduced in cellular communication for background
Example is applied, and using the term in the long term evolution/long term evolution-advanced (LTE/LTE-A) or 5G of such as 3GPP formulations.So
And as will be understood by the skilled person in the art, the embodiment of the present invention is not limited to follow the wireless communication association of 3GPP formulations
The wireless communication system of view, but can be applied in any communication system there are similar problems, such as WLAN, cable modem
Letter system or following other communication systems etc. developed.
Equally, the terminal device in the disclosure can be user equipment (UE), can also be with wired or channel radio
Any terminal of telecommunication function, it is including but not limited to, mobile phone, computer, personal digital assistant, game machine, wearable device, vehicle-mounted
Communication equipment, machine type communication (MTC) equipment, device-to-device (D2D) communication equipment, vehicle are set to extraneous (V2X) communication
Standby and sensor etc..The term terminal device can with UE, movement station, subscriber station, mobile terminal, user terminal or wirelessly set
It is standby to be used interchangeably.In addition, the network equipment can be network node, such as node B (Node B or NB), base transceiver station
(BTS), base station (BS) or base station sub-system (BSS), relaying, long distance wireless head end (RRF), access node (AN), access point
(AP) etc..
Showing for the example communication system 100 for the method that can be implemented within embodiment of the disclosure is shown in FIG. 1
It is intended to.Communication system 100 may include one or more network equipment 101.For example, in the communication system 100, the network equipment
101 can be presented as base station, such as the node B (eNodeB or eNB) of evolution.It should be understood that the network equipment 101 also may be used
To be presented as other forms, such as node B, base transceiver station (BTS), base station (BS) or base station sub-system (BSS), in
After device etc..The network equipment 101 provides wireless connection for the multiple terminal devices 111-112 within its coverage area.Terminal
Equipment 111,112 can be via wireless transmission channel 131 or 132 and network device communications, and/or via transmission channel 133
It communicates with one another.
In some embodiments, terminal device 111 and 112 for example can be in V2X communication in equipment (for example,
The terminal device on two vehicles moved towards on highway).Merely for exemplary purpose, communicated herein with V2X
For describe implementation of the disclosure example, and such as terminal device 111 and 112 be respectively served as sender in V2X communications and
Recipient.It will be appreciated, however, that embodiment of the disclosure can also be applied in other communication scenes.Such as it is logical at other
Believe scene in, the other equipment (for example, network equipment 101) in addition to terminal device 111 and 112 can serve as sender or
Recipient.The scope of the present disclosure is not limited in this respect.
In V2X communications, it usually needs improve link-quality and reliability using transmission diversity technology.For example, serving as
The copy of transmission signal with differential declines degree can be supplied to the communication for serving as recipient by the communication equipment of sender
Equipment, to promote the correct detection of the signal at recipient.Transmission diversity scheme pair used by the characteristic requirements of V2X communications
It is insensitive in Doppler effect, and require the PAPR of transmission signal as low as possible to realize compared with high effect.
Traditional transmission diversity scheme for example may include prelisting in cyclic delay diversity (CDD), time domain and/or frequency domain
Code device vector switching (PVS), space-time block coding (STBC) and Space Frequency Block Coding (SFBC) etc..However, CDD and PVS only can
Limited diversity gain is provided.Potential Doppler effect in being communicated due to V2X, STBC are changed with time possibility due to channel
By performance loss.In addition, the SFBC on adjacent sub-carrier there may be PARP problems, i.e., sent out using different transmit antenna ports
The signal sent has different PARP values.SFBC in non-contiguous sub-carriers with the variation of frequency can suffer from performance due to channel
Loss, and the design (for example, linear minimum mean-squared error LMMSE methods) of its receiving terminal is more multiple for other schemes
It is miscellaneous.
One or more to solve the above-mentioned problems and in other potential problems, embodiment of the disclosure propose
Transmission diversity scheme based on the SFBC on adjacent sub-carrier.The program can realize full diversity gains, and V2X is communicated
In Doppler effect it is insensitive and can support the relevant merging with low complex degree.The program is by being directed to different transmittings
Antenna port application unequal power scaling come balance it is different send signals different PAPR values.In addition, unequal power scaling pair
Can be transparent or opaque for the communication equipment for serving as recipient.
Transmission diversity scheme according to an embodiment of the present disclosure is described referring now to Fig. 2-5.It is convenient to discuss, to Fig. 2-
Environment with reference to shown in figure 1 is unfolded for 5 description.
Fig. 2 shows the flow charts of method 200 according to an embodiment of the present disclosure.In some embodiments, this method 200 can
To be executed by serving as the communication equipment (for example, terminal device 111) of sender in such as V2X communications.For convenience of description, below
Method 200 is described in conjunction with the terminal device 111 of Fig. 1.It should be understood that method 200 can also include unshowned
Additional step and/or shown step is can be omitted, the scope of the present disclosure is not limited in this respect.
As shown in Fig. 2, in frame 210, terminal device 111 is based on discrete Fourier transform (DFT), to sent data into
Row precoding.In some embodiments, data to be sent for example may include one group of constellation symbol through constellation mapping.One
In a little embodiments, such as the DFT of M point can be carried out to this group of constellation symbol, wherein M can correspond to distributed transmission belt
Wide (for example, the number for the subcarrier being used for transmission).In the case, data to be sent can for example utilize vector (S0,
S1..., SM-1) indicate, and the data through precoding can for example be represented as vector (X0, X1..., XM-1)。
In frame 220, terminal device 111 is to the data application SFBC through precoding to generate the first group code and second group of symbol
Number.For example, the first group code is associated with the first transmit antenna port at terminal device 111, and the second group code and end
The second transmit antenna port at end equipment 111 is associated.In some embodiments, the first transmit antenna port and the second transmitting
Antenna port can be the different transmit antenna port of any two at terminal device 111.That is, SFBC be used to generate needle
To the transmission signal of different transmit antenna ports.
In some embodiments, vector (X can be for example represented as by SFBC the first group codes generated0, X1...,
XM-2, XM-1), and vector can be for example represented as by SFBC the second group codes generatedWhereinIndicate X0Conjugate transposition,Indicate X1Conjugation turn
Set ... ... andIndicate XM-1Conjugate transposition.In some embodiments, the second group code can also be vectorWith the product for some coefficient (for example, -1) being not zero.
In frame 230, terminal device 111 is applied and the first transmit antenna port respectively to the first group code and the second group code
Associated first zoom factor and the second zoom factor associated with the second transmit antenna port.For example, with the first transmitting
Associated first zoom factor of antenna port can be by β1It indicates, and the second contracting associated with the second transmit antenna port
Putting the factor can be by β2It indicates.
In some embodiments, the first zoom factor β1It can be with the second zoom factor β2It is different.That is, serving as sender
Communication equipment (for example, terminal device 111) for different transmit antenna port application unequal powers scale.Specifically, one
In a little embodiments, the first zoom factor β11 is can be set to, namely power scaling is not carried out to the first group code.In this feelings
Under condition, the second zoom factor β2It can be set to less than compared with high papr values based on associated with the second transmit antenna port
Thus 1 value balances the different different PAPR values for sending signal.
In some embodiments, the first zoom factor β1And/or the second zoom factor β2Value can be with the transmission that is distributed
Bandwidth is associated.In some embodiments, for different situations, (for example, the different ratios of M and N, wherein N corresponds to entire
The bandwidth of channel), the first zoom factor β1And/or the second zoom factor β2Different values can be correspondingly arranged to.
In some embodiments, the first zoom factor β1And/or the second zoom factor β2It can be pre-arranged in communication system
(for example, being predefined in communication standard so that serve as the communication equipment of sender and/or serve as the logical of recipient in system
Letter equipment can obtain).Optionally, in further embodiments, the communication equipment of sender is served as (for example, terminal device
111) it can be sent to the communication equipment (for example, terminal device 112) for serving as recipient about the first zoom factor via signaling
β1And/or the second zoom factor β2Information.Particularly, as the first zoom factor β1The second zoom factor β equal to 12Less than 1
When, serve as sender communication equipment (for example, terminal device 111) can only to serve as recipient communication equipment (for example, eventually
End equipment 112) it sends about the second zoom factor β2Information.It is further retouched in detail below with reference to specific example
It states.
In frame 240, the first group code and the second group code are mapped in transmission subframe and are used for transmission number by terminal device 111
According at least partly SC-FDMA data symbols in, to be utilized respectively the first transmit antenna port and second in the transmission subframe
Transmit antenna port sends the first group code and the second group code.Unequal power scaling is applied to different transmittings as a result,
Antenna port come balance it is different send signals different PAPR values.
In some embodiments, above-mentioned unequal power scaling is for serving as the communication equipment of recipient (for example, terminal device
112) can be transparent for.That is, serving as the communication equipment (for example, terminal device 112) of recipient can need not hold
Any special operation go to receive signal.
In the case, for example, terminal device 111 can be by the first zoom factor β1With the second zoom factor β2It answers respectively
For for the first transmit antenna port the first reference signal and for the second reference signal of the second transmit antenna port.The
One reference signal and the second reference signal for example can be demodulated reference signals (DMRS).Terminal device 111 can also be by first
Reference signal and the second reference signal are mapped in transmission subframe and are used for transmission in the SC-FDMA symbols of reference signal, at this
The first transmit antenna port and the second transmit antenna port are utilized respectively to send the first reference signal and second in transmission subframe
Reference signal.
In this regard, Fig. 3 shows the schematic diagram of the transmission diversity scheme according to one embodiment of the disclosure.Fig. 3 is shown
By to data (X through DFT precodings0, X1..., XM-1) the first group code 311 for being generated using SFBC and second group
Symbol 312.For example, the first group code 311 is associated with the first transmit antenna port (being not shown in Fig. 3), and first group of symbol
Numbers 311 are represented as vector (X0, X1..., XM-2, XM-1).For example, the second group code 312 and second transmit antenna port (Fig. 3
In be not shown) it is associated, and the second group code 312 is represented as vector
Fig. 3 is also shown for the first reference signal 313 of the first transmit antenna port and for the second of the second transmit antenna port
Reference signal 314.In addition, Fig. 3 also schematically illustrate in the first transmit antenna port Transmission Time Interval 320 (also by
(also referred to as " the transmission subframe of Transmission Time Interval 330 referred to as " transmission subframe 320 ") and in the second transmit antenna port
330").As shown in figure 3, transmission subframe 320 and/or 330 may include 14 SC-FDMA symbols, for example, wherein 0-1,3-
4,6-7,9-10 and 12 SC-FDMA symbols can be used for transmission data, and the 2nd, 5,8 and 11 SC-FDMA symbol can be used for
Transmission of reference signals (for example, DMRS), and the 13rd SC-FDMA symbol can be protection character number (Guard Symbol).
As shown in figure 3, the first zoom factor β1It can be applied to the first group code 311 and the first reference signal 313.?
Applied the first zoom factor β1Later, the first group code 311 can be mapped in transmission subframe 320 and be used for transmission data
In all SC-FDMA data symbols (that is, 0-1,3-4,6-7,9-10 and 12 SC-FDMA symbols), and the first reference
Signal 313 is mapped in transmission subframe 320 and is used for transmission in the SC-FDMA symbols of reference signal (that is, the 2nd, 5,8 and 11
A SC-FDMA symbols).Similarly, the second zoom factor β2It can be applied to the second group code 312 and the second reference signal
314.Applied the second zoom factor β2Later, the second group code 312 can be mapped in transmission subframe 330 and be used for transmission
In all SC-FDMA data symbols of data (that is, 0-1,3-4,6-7,9-10 and 12 SC-FDMA symbols), and the
Two reference signals 314 can be mapped in transmission subframe 330 and be used for transmission in the SC-FDMA symbols of reference signal (that is, the
2,5,8 and 11 SC-FDMA symbols).
In example as shown in Figure 3, since DMRS also uses zoom factor identical with data-signal to be scaled,
The communication equipment (for example, terminal device 111) for serving as sender need not be to serving as the communication equipment of recipient (for example, terminal
Equipment 112) it sends about zoom factor (for example, β1And/or β2) information.The communication equipment of recipient is served as (for example, terminal
Equipment 112) any special operation need not be also executed to receive signal.That is, above-mentioned unequal power scaling is received for serving as
It is transparent for the communication equipment (for example, terminal device 112) of side.
In further embodiments, unequal power scaling is for serving as the communication equipment of recipient (for example, terminal device
112) it is opaque for.For example, in some cases, the communication equipment (for example, terminal device 111) for serving as sender can
Not apply different zoom factors to corresponding reference signal.At this point, terminal device 112 needs to obtain about to data-signal
The information of the zoom factor of application, to carry out the reception of data-signal based on the information.
In this regard, Fig. 4 shows the schematic diagram of transmission diversity scheme according to another embodiment of the present disclosure.With Fig. 3 classes
Seemingly, Fig. 4 is shown by the data (X through DFT precodings0, X1..., XM-1) the first group code for being generated using SFBC
411 and second group code 412.For example, the first group code 411 is associated with the first transmit antenna port (being not shown in Fig. 4), and
And second group code 412 it is associated with the second transmit antenna port (being not shown in Fig. 4).Fig. 4 is also shown for the first transmitting
First reference signal 417 of antenna port and the second reference signal 418 for the second transmit antenna port.In addition, Fig. 4 also shows
Show to example property Transmission Time Interval 420 (also referred to as " transmission subframe 420 ") in the first transmit antenna port and the
Transmission Time Interval 430 (also referred to as " transmission subframe 430 ") in two transmit antenna ports.As shown in figure 4, transmission subframe
420 and/or 430 may include 14 SC-FDMA symbols, for example, wherein 0-1,3-4,6-7,9-10 and 12 SC-FDMA symbols
Number data are used for transmission, the 2nd, 5,8 and 11 SC-FDMA symbol is used for transmission reference signal (for example, DMRS), and the 13rd
SC-FDMA symbols are protection symbol (Guard Symbol).
Different from Fig. 3, the SC-FDMA data symbols that data are used for transmission in transmission subframe 420 and/or 430 may include
It is used for transmission first group of SC-FDMA data symbol of the data generated based on SFBC and is used for transmission based on STBC and generates
Second group of SC-FDMA data symbol of data.In some embodiments, it is used for transmission the second of the data generated based on STBC
Group SC-FDMA data symbols may include one or more SC-FDMA data symbols pair namely second group of SC-FDMA data symbols
The number of symbol in number is even number.As shown in figure 4, such as second group of SC-FDMA data symbol may include 0-1,3-4,
6-7,9-10 SC-FDMA symbols.In the case, first group of SC-FDMA data symbol may include remaining SC-FDMA numbers
According to symbol namely the 12nd SC-FDMA symbol.In further embodiments, such as second group of SC-FDMA data symbol can also
Including the 1st and 3,4 and 6,7 and 9,10 and 12 SC-FDMA symbols.In the case, first group of SC-FDMA data symbol can be with
Including remaining SC-FDMA data symbols namely the 0th SC-FDMA symbol.
In addition, Fig. 4 is also shown by the data (X through DFT precodings0, X1..., X2M-1) generated using STBC
Third group code 413, the 4th group code 414, the 5th group code 415 and the 6th group code 416.Wherein, third group code 413
It is associated with the first transmit antenna port with the 4th group code 414, and the 5th group code 415 and the 6th group code 416 and
Two transmit antenna ports are associated.Third group code 413 and the 4th group code 414 can for example be mapped to transmission subframe 420
In second group of SC-FDMA data symbol (for example, 0-1,3-4,6-7,9-10 SC-FDMA symbols) in.5th group code
415 and the 6th group code 416 can for example be mapped to transmission subframe 430 in second group of SC-FDMA data symbol (that is,
0-1,3-4,6-7,9-10 SC-FDMA symbols) in.
As shown in figure 4, the first zoom factor β1It is only applied to the first group code 411, and is not applied to the first reference
Signal 417.Applied the first zoom factor β1Later, the first group code 411 is mapped to first group in transmission subframe 420
In SC-FDMA data symbols (for example, the 12nd SC-FDMA symbol).Not by 417 quilt of the first reference signal of application zoom factor
It is mapped in transmission subframe 420 and is used for transmission in the SC-FDMA symbols of reference signal (that is, the 2nd, 5,8 and 11 SC-FDMA
Symbol).Similarly, the second zoom factor β2It is only applied to the second group code 412, and is not applied to the second reference signal
418.Applied the second zoom factor β2Later, the second group code 412 is mapped to first group of SC- in transmission subframe 430
In FDMA data symbols (for example, the 12nd SC-FDMA symbol).It is not reflected by the second reference signal 418 of application zoom factor
It is mapped in transmission subframe 430 and is used for transmission in the SC-FDMA symbols of reference signal (that is, the 2nd, 5,8 and 11 SC-FDMA symbol
Number).
In example as shown in Figure 4, it is scaled since zoom factor identical with data-signal is not used in DMRS,
The communication equipment (for example, terminal device 112) for serving as recipient needs the corresponding operation of execution to contract by unequal power to receive
The data-signal put.That is, above-mentioned unequal power scales the communication equipment (for example, terminal device 112) for serving as recipient
For be not transparent.
In this regard, Fig. 5 shows the method implemented at the communication equipment for serving as recipient in accordance with an embodiment of the present disclosure
500 flow chart.In some embodiments, this method 500 serves as the communication equipment of recipient in being communicated by such as V2X
(for example, terminal device 112) executes.For convenience of description, method 500 is retouched with reference to the terminal device of Fig. 1 112
It states.It should be understood that method 500 can also include unshowned additional step and/or can be omitted shown step, this
Scope of disclosure is not limited in this respect.
As shown in figure 5, in frame 510, terminal device 112 obtains the information about zoom factor.The zoom factor is applied
In the data sent using transmit antenna port, and the data are generated based on SFBC.
In some embodiments, zoom factor can be pre-arranged in a communications system (for example, being predefined logical
In beacon standard so that terminal device 112 can obtain).In further embodiments, terminal device 112 can via signaling from
Serve as information of communication equipment (for example, terminal device 111) reception of sender about zoom factor.
As described above, in some embodiments, the value of zoom factor can be related to the transmission bandwidth distributed
Connection.In some embodiments, for different situations, (for example, the different ratios of M and N, wherein N corresponds to the band of entire channel
It is wide), zoom factor can correspond to different values.
In frame 520, for terminal device 112 in response to receiving the reference signal for utilizing transmit antenna port to send, being based on should
Reference signal determines the parameter of channel associated with transmit antenna port.In some embodiments, the reference signal is for example
Including DMRS, and the reference signal is not used zoom factor identical with data-signal and is scaled.
In frame 530, terminal device 112 is based on based on acquired zoom factor and identified channel parameter, reception
SFBC and the data generated.In some embodiments, acquired zoom factor can be applied to determine by terminal device 112
Channel parameter namely terminal device 112 channel parameter of respective channel can be zoomed in and out using different zoom factors.
Then, terminal device 112 can receive the data generated based on SFBC based on obtained new channel parameter.
From the above, it can be seen that the transmission based on the SFBC on adjacent sub-carrier that embodiment of the disclosure is proposed
Diversity scheme can realize full diversity gains, and the Doppler effect in being communicated for V2X is insensitive and can support have
The relevant merging of low complex degree.The program for different transmit antenna port application unequal power scalings by balancing different hairs
The different PAPR values for the number of delivering letters.In addition, unequal power scaling can be transparent for the communication equipment for serving as recipient
Or it is opaque.
Fig. 6 shows the block diagram of the device 600 according to some embodiments of the disclosure.In some embodiments, the device
600 can be embodied at the communication equipment for serving as sender in such as V2X communications, such as at terminal device shown in FIG. 1 111.
Device 600 can be the system based on software module, can also be the hardware component of transmitter etc.Particularly, in some realities
It applies in example, device 600 can also be considered as a kind of example implementation of sender itself.
As shown in fig. 6, device 600 may include precoding module 610, it is configured as being based on discrete Fourier transform
(DFT), precoding is carried out to sent data.Device 600 can also include SFBC coding modules 620, be configured as to warp
The data application Space Frequency Block Coding (SFBC) of precoding is to generate the first group code and the second group code, the first group code and first
Transmit antenna port is associated, and the second group code is associated with the second transmit antenna port.Device 600 can also include the
One Zoom module 630 is configured as applying respectively to the first group code and the second group code related to the first transmit antenna port
The first zoom factor and the second zoom factor associated with the second transmit antenna port of connection.In addition, device 600 can also wrap
The first mapping block 640 is included, is configured as being mapped to transmit in subframe by the first group code and the second group code being used for transmission number
According at least partly single carrier frequency division multiplexing (SC-FDMA) data symbol in, to be utilized respectively the first hair in the transmission subframe
Antenna port and the second transmit antenna port are penetrated to send the first group code and the second group code.
In some embodiments, the first zoom factor can be different from the second zoom factor.
In some embodiments, the first zoom factor can be 1, and the second zoom factor can be less than first scaling because
Son.
In some embodiments, the first mapping block 640 can be additionally configured to the first group code and the second group code
It is mapped in whole SC-FDMA data symbols in transmission subframe.
In some embodiments, device 600 can also include the second Zoom module, be configured as the first zoom factor and
Second zoom factor is respectively applied to the first reference signal for the first transmit antenna port and is directed to the second transmitting antenna end
Second reference signal of mouth；And second mapping block, it is configured as the first reference signal and the second reference signal being mapped to
It is used for transmission in the SC-FDMA symbols of reference signal in transmission subframe, to be utilized respectively the first transmitting day in the transmission subframe
Line end mouth and the second transmit antenna port send the first reference signal and the second reference signal.
In some embodiments, the first reference signal and the second reference signal may include demodulated reference signal.
In some embodiments, transmission subframe can include at least first group be used for transmission based on the SFBC data generated
SC-FDMA data symbols and it is used for transmission second group of SC-FDMA data symbol based on the STBC data generated, and first reflects
Module 640 is penetrated to can be additionally configured to the first group code and the second group code being mapped in first group of SC-FDMA data symbol.
In some embodiments, device 600 can also include third mapping block, be configured as that the first transmitting day will be directed to
First reference signal of line end mouth and for the second transmit antenna port the second reference signal be mapped to transmission subframe in be used for
In the symbol of transmission of reference signals, to be utilized respectively the first transmit antenna port and the second transmitting antenna end in the transmission subframe
Mouthful send the first reference signal and the second reference signal.
In some embodiments, the number of the symbol in second group of SC-FDMA data symbol can be even number.
In some embodiments, device 600 can also include sending module, be configured as sending about the first zoom factor
With the information of the second zoom factor.
Fig. 7 shows the block diagram of the device 700 according to some embodiments of the disclosure.In some embodiments, the device
700 can be embodied at the communication equipment for serving as recipient in such as V2X communications, such as at terminal device shown in FIG. 1 112.
Device 700 can be the system based on software module, can also be the hardware component of receiver etc.Particularly, in some realities
It applies in example, device 700 can also be considered as a kind of example implementation of recipient itself.
As shown in fig. 7, device 700 may include acquisition module 710, it is configured as obtaining the information about zoom factor,
The zoom factor is applied to the data sent using transmit antenna port, and the data are based on Space Frequency Block Coding (SFBC) quilt
It generates.Device 700 can also include determining module 720, be configured to respond to receive the transmit antenna port is utilized to send
Reference signal, the parameter of channel associated with the transmit antenna port is determined based on reference signal.In addition, device 700
It can also include receiving module 730, be configured the parameter based on the zoom factor and channel, receive data.
In some embodiments, zoom factor can be preconfigured to be associated with the transmission bandwidth of the channel.
In some embodiments, acquisition module 710 can be additionally configured to receive about the zoom factor via signaling
Information.
For purposes of clarity, certain optional modules of device 600 and/or 700 are not shown in figure 6 and figure 7.So
And, it should be understood that it is equally applicable to device 600 above with reference to each feature described in Fig. 1-4；Similarly, above with reference to Fig. 1
It is equally applicable to device 700 with each feature described in Fig. 3-5.Moreover, the modules of device 600 and/or 700 can be
Hardware module can also be software module.For example, in certain embodiments, device 600 and/or 700 can be some or all of
It is realized, such as is implemented as comprising computer program product on a computer-readable medium using software and/or firmware.It is standby
Selection of land or additionally, device 400 and/or 500 some or all of can be realized based on hardware, such as be implemented as integrated electricity
Road (IC), application-specific integrated circuit (ASIC), system on chip (SOC), field programmable gate array (FPGA) etc..The scope of the present disclosure
It is not limited in this respect.
Fig. 8 shows the block diagram for the communication equipment 600 for being suitable for realizing embodiment of the disclosure.Equipment 800 can be used for real
Sender or recipient in existing embodiment of the disclosure, such as the network equipment shown in FIG. 1 101 or terminal device 111
Or 112.
As shown in the example in Fig. 8, equipment 800 includes processor 810.The operation of 810 control device 800 of processor and work(
Energy.For example, in certain embodiments, processor 810 can be by means of the instruction that is stored in coupled memory 820
830 execute various operations.Memory 820 can be any suitable type suitable for local technical environment, and can be with
It is realized using any suitable data storage technology, memory device, magnetic memory device including but not limited to based on semiconductor
With system, light storage device and system.It, can be in equipment 800 although illustrate only a memory cell in Fig. 8
The memory cell for having multiple physics different.
Processor 810 can be any suitable type suitable for local technical environment, and may include but unlimited
In all-purpose computer, special purpose computer, microcontroller, digital signal controller (DSP) and based on controller multinuclear control
One or more of device framework core.Equipment 800 can also include multiple processors 810.Processor 810 can also and transceiver
840 couplings, transceiver 840 can realize reception and the hair of information by means of one or more antennas 850 and/or other component
It send.
In accordance with an embodiment of the present disclosure, processor 810 and memory 820 can be with compounding practices, to realize above with reference to Fig. 2
With the method 200 and/or 500 of Fig. 5 descriptions.Specifically, when communication equipment 800 serves as sender, when in memory 820
When instruction 830 is executed by processor 810,800 execution method 200 of communication equipment can be made.When communication equipment 800 serves as recipient
When, when the instruction 830 in memory 820 is executed by processor 810,800 execution method 500 of communication equipment can be made.It will manage
Solution, above-described all features are suitable for equipment 800, and details are not described herein.
In general, the various example embodiments of the disclosure can hardware or special circuit, software, logic or its
What implements in combining.Some aspects can be implemented within hardware, and other aspects can by controller, microprocessor or
Implement in the firmware or software that other computing devices execute.When the various aspects of embodiment of the disclosure are illustrated or described as frame
When figure, flow chart or other certain graphical representations of use, it will be understood that box described herein, device, system, techniques or methods can
Using in terms of as unrestricted example in hardware, software, firmware, special circuit or logic, common hardware or controller or other
It calculates and implements in equipment or its certain combination.
As an example, embodiment of the disclosure can also be described in the context of machine-executable instruction, machine can
Execute instruction such as includes in the program module that is executed in device on the true or virtual processor of target.It is general and
Speech, program module include routine, program, library, object, class, component, data structure etc., execute specific task or realization
Specific abstract data structure.In embodiments, the function of program module can merge between described program module
Or segmentation.Machine-executable instruction for program module can execute in local or distributed apparatus.In distribution
In equipment, program module can be located locally in remote medium storage the two.
The computer program code of method used to implement the present disclosure can be write with one or more programming languages.These
Computer program code can be supplied to the processing of all-purpose computer, special purpose computer or other programmable data processing units
Device so that program code by computer or other programmable data processing units execution when, cause flow chart and/
Or function/operation specified in block diagram is carried out.Program code can completely on computers, part on computers, conduct
Independent software package, part are on computers and part is held on a remote computer or server on the remote computer or completely
Row.
In the context of the disclosure, machine readable media can be include or storage be used for or about instruction execution system
Any tangible medium of the program of system, device or equipment.Machine readable media can be that machine-readable signal medium or machine can
Read storage medium.Machine readable media can include but is not limited to electronics, magnetic, it is optical, electromagnetism, infrared or partly lead
Body system, device or equipment equipment or its any appropriate combination.The more detailed example of machine readable storage medium includes carrying one
Or the electrical connection of multiple conducting wires, portable computer diskette, hard disk, random access memories (RAM), read-only memory
(ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), light storage device, magnetic storage apparatus or its is any appropriate
Combination.
In addition, although operation is depicted with particular order, this simultaneously should not be construed and require this generic operation to show
Particular order is completed with sequential order, or executes the operation of all diagrams to obtain expected result.In some cases, more
Task or parallel processing can be beneficial.Similarly, although discussed above contain certain specific implementation details, this is not
It should be interpreted that any invention of limitation or the scope of the claims, and should be interpreted that the specific embodiment to specific invention can be directed to
Description.Certain features in this specification described in the context of separated embodiment can also combined implementation single real
It applies in example.Conversely, various features described in the context of single embodiment can also discretely multiple embodiments or
Implement in any appropriate sub-portfolio.
Although with specific to the language description of structural features and or methods of action theme, but it is to be understood that institute
The theme limited in attached claim is not limited to above-described special characteristic or action.On the contrary, above-described specific spy
Action of seeking peace is disclosed as the exemplary forms for realizing claim.
Claims (26)
1. a kind of communication means, including：
Based on discrete Fourier transform (DFT), precoding is carried out to sent data；
To the data application Space Frequency Block Coding (SFBC) through precoding to generate the first group code and the second group code, described first
Group code is associated with the first transmit antenna port, and second group code is associated with the second transmit antenna port；
Associated with first transmit antenna port the is applied respectively to first group code and second group code
One zoom factor and the second zoom factor associated with second transmit antenna port；And
First group code and second group code are mapped to and are used for transmission at least partly single of data in transmission subframe
In carrier wave frequency division multiplexing (SC-FDMA) data symbol, to be utilized respectively first transmitting antenna end in the transmission subframe
Mouthful and second transmit antenna port send first group code and second group code.
2. according to the method described in claim 1, wherein described first zoom factor is different from second zoom factor.
3. according to the method described in claim 2, wherein described first zoom factor is 1, and second zoom factor is small
In first zoom factor.
4. according to the method described in claim 1, wherein first group code and second group code are mapped to described
At least partly SC-FDMA data symbols include：
First group code and second group code are mapped to whole SC-FDMA data symbols in the transmission subframe
In.
5. according to the method described in claim 4, further including：
First zoom factor and second zoom factor are respectively applied to for first transmit antenna port
First reference signal and the second reference signal for second transmit antenna port；And
First reference signal and second reference signal are mapped in the transmission subframe and are used for transmission reference signal
SC-FDMA symbols in, be utilized respectively in the transmission subframe first transmit antenna port and it is described second transmitting
Antenna port sends first reference signal and second reference signal.
6. according to the method described in claim 5, wherein described first reference signal and second reference signal include demodulation
Reference signal.
7. according to the method described in claim 1, the wherein described transmission subframe is included at least to be used for transmission and be generated based on SFBC
First group of SC-FDMA data symbol of data and it is used for transmission second group of the data generated based on space-time block coding (STBC)
SC-FDMA data symbols, and first group code and second group code are mapped at least partly SC-FDMA
Data symbol includes：
First group code and second group code are mapped in first group of SC-FDMA data symbol.
8. according to the method described in claim 7, further including：
It will be for the first reference signal of first transmit antenna port and for described in second transmit antenna port
Second reference signal is mapped in the transmission subframe and is used for transmission in the symbol of reference signal, to divide in the transmission subframe
First reference signal and described is not sent using first transmit antenna port and second transmit antenna port
Second reference signal.
9. according to the method described in claim 7, the number of the symbol in wherein described second group of SC-FDMA data symbol is even
Number.
10. according to the method described in claim 1, further including：
Send the information about first zoom factor and second zoom factor.
11. a kind of communication means, including：
The information about zoom factor is obtained, the zoom factor is applied to the data sent using transmit antenna port, and
And the data are generated based on Space Frequency Block Coding (SFBC)；
In response to receiving the reference signal sent using the transmit antenna port, determined based on the reference signal and institute
State the parameter of the associated channel of transmit antenna port；And
Parameter based on the zoom factor and the channel, receives the data.
12. according to the method for claim 11, wherein the zoom factor is preconfigured to be the transmission with the channel
Bandwidth is associated.
13. according to the method for claim 11, wherein obtaining and including about the information of zoom factor：
The described information about the zoom factor is received via signaling.
14. a kind of communication equipment, including：
Processor；And
Memory, the memory are stored with instruction, and described instruction makes the communication equipment hold when being executed by the processor
Action is made, and the action includes：
Based on discrete Fourier transform (DFT), precoding is carried out to sent data；
To the data application Space Frequency Block Coding (SFBC) through precoding to generate the first group code and the second group code, described first
Group code is associated with the first transmit antenna port, and second group code is associated with the second transmit antenna port；
Associated with first transmit antenna port the is applied respectively to first group code and second group code
One zoom factor and the second zoom factor associated with second transmit antenna port；And
First group code and second group code are mapped to and are used for transmission at least partly single of data in transmission subframe
In carrier wave frequency division multiplexing (SC-FDMA) data symbol, to be utilized respectively first transmitting antenna end in the transmission subframe
Mouthful and second transmit antenna port send first group code and second group code.
15. communication equipment according to claim 14, wherein first zoom factor and second zoom factor are not
Together.
16. communication equipment according to claim 15, wherein first zoom factor is 1, and second scaling
The factor is less than first zoom factor.
17. communication equipment according to claim 14, wherein first group code and second group code are mapped
Include at least partly SC-FDMA data symbols：
First group code and second group code are mapped to whole SC-FDMA data symbols in the transmission subframe
In.
18. communication equipment according to claim 17, the action further include：
First zoom factor and second zoom factor are respectively applied to for first transmit antenna port
First reference signal and the second reference signal for second transmit antenna port；And
First reference signal and second reference signal are mapped in the transmission subframe and are used for transmission reference signal
SC-FDMA symbols in, be utilized respectively in the transmission subframe first transmit antenna port and it is described second transmitting
Antenna port sends first reference signal and second reference signal.
19. communication equipment according to claim 18, wherein first reference signal and the second reference signal packet
Include demodulated reference signal.
20. communication equipment according to claim 14 is used for transmission wherein the transmission subframe includes at least based on SFBC
First group of SC-FDMA data symbol of the data of generation and it is used for transmission the of the data generated based on space-time block coding (STBC)
Two groups of SC-FDMA data symbols, and first group code and second group code are mapped at least partly SC-
FDMA data symbols include：
First group code and second group code are mapped in first group of SC-FDMA data symbol.
21. communication equipment according to claim 20, the action further include：
It will be for the first reference signal of first transmit antenna port and for described in second transmit antenna port
Second reference signal is mapped in the transmission subframe and is used for transmission in the symbol of reference signal, to divide in the transmission subframe
First reference signal and described is not sent using first transmit antenna port and second transmit antenna port
Second reference signal.
22. communication equipment according to claim 20, wherein the number of the symbol in second group of SC-FDMA data symbol
Mesh is even number.
23. communication equipment according to claim 14, wherein described instruction also make described when being executed by the processor
Communication equipment：
Send the information about first zoom factor and second zoom factor.
24. a kind of communication equipment, including：
Processor；And
Memory, the memory are stored with instruction, and described instruction makes the communication equipment when being executed by the processor：
The information about zoom factor is obtained, the zoom factor is applied to the data sent using transmit antenna port, and
And the data are generated based on Space Frequency Block Coding (SFBC)；
In response to receiving the reference signal sent using the transmit antenna port, determined based on the reference signal and institute
State the parameter of the associated channel of transmit antenna port；And
Parameter based on the zoom factor and the channel, receives the data.
25. communication equipment according to claim 24, wherein the zoom factor is preconfigured to be and the channel
Transmission bandwidth is associated.
26. communication equipment according to claim 24, wherein obtaining and including about the information of zoom factor：
The described information about the zoom factor is received via signaling.
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