CN108540418A - A kind of data modulation method and device of edge subband - Google Patents
A kind of data modulation method and device of edge subband Download PDFInfo
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- CN108540418A CN108540418A CN201710127897.8A CN201710127897A CN108540418A CN 108540418 A CN108540418 A CN 108540418A CN 201710127897 A CN201710127897 A CN 201710127897A CN 108540418 A CN108540418 A CN 108540418A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
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Abstract
The invention discloses a kind of data modulation method and device of edge subband, the method includes：Subcarrier is selected on the edge subband at transmission band both ends, wherein the position of the subcarrier characterizes modulation intelligence；Data are modulated according to the position of selected subcarrier.
Description
Technical field
The present invention relates to multi-transceiver technology field more particularly to a kind of data modulation methods of the edge subband of multicarrier system
Method and device.
Background technology
Long Term Evolution (LTE, Long Term Evolution) is by third generation partner program (3GPP, The
3rd Generation Partnership Project) Universal Mobile Communication System (UMTS, the Universal that organize to set up
Mobile Telecommunications System) technical standard long term evolution.LTE system introduces orthogonal frequency division multiplexing
What (OFDM, Orthogonal Frequency Division Multiplexing) technology, subcarrier and OFDM symbol were constituted
Running time-frequency resource constitutes the radio physical running time-frequency resource of LTE system.But the band external leakage of LTE system is bigger, therefore transmit
The both ends of frequency band will often vacate a band frequency as protection interval, to reduce the influence with external leakage to nearby frequency bands.This
Sample one causes the waste of transmission band, reduces spectrum utilization efficiency to a certain extent unavoidably.
Invention content
In order to solve the above technical problems, an embodiment of the present invention provides a kind of data modulation methods and dress of edge subband
It sets, so that multicarrier system is efficiently used the edge subband at transmission band both ends, and control the influence with external leakage.
The data modulation method of edge subband provided in an embodiment of the present invention, including：
Subcarrier is selected on the edge subband at transmission band both ends, wherein the position characterization modulation letter of the subcarrier
Breath；
Data are modulated according to the position of selected subcarrier.
In the embodiment of the present invention, the position of the subcarrier characterizes modulation intelligence, including：
The position of single sub-carrier characterizes a modulation intelligence or the position grouping of multiple subcarriers characterizes a modulation
Information.
It is described to select subcarrier on the edge subband at transmission band both ends in the embodiment of the present invention, according to selected
The position of subcarrier is modulated data, including：
It is multiple time/frequency source blocks by edge sub-band division；
For each time/frequency source block, determines that the position of the subcarrier in the time/frequency source block is corresponding with data and close
System；
The correspondence of position and data based on the subcarrier selects corresponding subcarrier for data to be transmitted；
The data to be transmitted are mapped on selected subcarrier.
In the embodiment of the present invention, it is described by edge sub-band division be multiple time/frequency source blocks, including：
It is p time/frequency source block by edge sub-band division, p is the integer more than or equal to 1, wherein different time/frequency source blocks
Including number of subcarriers it is identical or different.
In the embodiment of the present invention, the data volume of the data to be transmitted of different time/frequency source block loads is identical or different.
It is described to select corresponding subcarrier for data to be transmitted in the embodiment of the present invention, including：
Subcarrier is selected in the time-domain symbol of the time/frequency source block, wherein for data to be transmitted in different time domain
The number of subcarriers selected on symbol is identical or different, and the sub-carrier positions selected on different time domain symbol are identical or different.
The data modulating device of edge subband provided in an embodiment of the present invention, including：
Selecting unit, for selecting subcarrier on the edge subband at transmission band both ends, wherein the position of the subcarrier
Set characterization modulation intelligence；
Modulation unit, for being modulated to data according to the position of selected subcarrier.
In the embodiment of the present invention, the position of the subcarrier characterizes modulation intelligence, including：
The position of single sub-carrier characterizes a modulation intelligence or the position grouping of multiple subcarriers characterizes a modulation
Information.
In the embodiment of the present invention, described device further includes：
Division unit, for being multiple time/frequency source blocks by edge sub-band division；
Determination unit, for being directed to each time/frequency source block, determine the position of the subcarrier in the time/frequency source block with
The correspondence of data；
The selecting unit is specifically used for the correspondence of position and data based on the subcarrier, is to be transmitted
Data select corresponding subcarrier；
The modulation unit, specifically for the data to be transmitted are mapped on selected subcarrier.
In the embodiment of the present invention, the division unit is specifically used for edge sub-band division being p time/frequency source block, and p is
Integer more than or equal to 1, wherein the number of subcarriers that different time/frequency source blocks include is identical or different.
In the embodiment of the present invention, the data volume of the data to be transmitted of different time/frequency source block loads is identical or different.
In the embodiment of the present invention, the selecting unit is specifically used for for data to be transmitted in the time/frequency source block
Subcarrier is selected in time-domain symbol, wherein the number of subcarriers selected on different time domain symbol is identical or different, when different
The sub-carrier positions selected on the symbol of domain are identical or different.
In the technical solution of the embodiment of the present invention, subcarrier is selected on the edge subband at transmission band both ends, wherein institute
State the position characterization modulation intelligence of subcarrier；Data are modulated according to the position of selected subcarrier.In this way, can be
Increase modulation intelligence amount while reducing subcarrier load, reduces transmission power, and control the influence with external leakage, make overloading
Wave system system reduces or omits frequency band protection interval, efficiently uses the edge subband at transmission band both ends.
Description of the drawings
Attached drawing generally shows each embodiment discussed herein by way of example and not limitation.
Fig. 1 is the flow diagram one of the data modulation method of the edge subband of the embodiment of the present invention；
Fig. 2 is the flow diagram two of the data modulation method of the edge subband of the embodiment of the present invention；
Fig. 3 is that the flow of the data modulation method of the edge subband of the 5MHz bandwidth multicarrier systems of the embodiment of the present invention is shown
It is intended to；
Fig. 4 is the structure composition schematic diagram of the data modulating device of the edge subband of the embodiment of the present invention.
Specific implementation mode
The characteristics of in order to more fully hereinafter understand the embodiment of the present invention and technology contents, below in conjunction with the accompanying drawings to this hair
The realization of bright embodiment is described in detail, appended attached drawing purposes of discussion only for reference, is not used for limiting the embodiment of the present invention.
The band external leakage of LTE system is bigger, therefore the both ends of transmission band will often vacate a band frequency as protection
Interval, to reduce the influence with external leakage to nearby frequency bands.So, transmission band is caused to a certain extent unavoidably
Waste, reduces spectrum utilization efficiency.For this purpose, the embodiment of the present invention proposes a kind of data of the edge subband of multicarrier system
Modulator approach and device allow multicarrier system to efficiently use the edge subband at transmission band both ends, and control band and leak
The influence of leakage.
It is the explanation of the relevant Key Term of the embodiment of the present invention below：
Multicarrier system：Refer to the system for having used multiple subcarriers to carry out transmission data, such as ofdm system.
Transmitting node：Following transmitting equipment is referred to as transmitting node by the embodiment of the present invention：Base station, terminal, relaying
(relay), launch point (transmitting point) etc..
Fig. 1 is the flow diagram one of the data modulation method of the edge subband of the embodiment of the present invention, as shown in Figure 1, institute
The data modulation method for stating edge subband includes the following steps：
Step 101：Subcarrier is selected on the edge subband at transmission band both ends, wherein the position table of the subcarrier
Levy modulation intelligence.
Here, the position of the subcarrier characterizes modulation intelligence, including：
The position of single sub-carrier characterizes a modulation intelligence or the position grouping of multiple subcarriers characterizes a modulation
Information.
Step 102：Data are modulated according to the position of selected subcarrier.
It is multiple time/frequency source blocks by edge sub-band division in the embodiment of the present invention；For each time/frequency source block, determine
The position of subcarrier in the time/frequency source block and the correspondence of data；Pair of position and data based on the subcarrier
It should be related to, corresponding subcarrier is selected for data to be transmitted；The data to be transmitted are mapped to selected subcarrier
On.
In said program, it is described by edge sub-band division be multiple time/frequency source blocks, including：
It is p time/frequency source block by edge sub-band division, p is the integer more than or equal to 1, wherein different time/frequency source blocks
Including number of subcarriers it is identical or different.
In said program, the data volume of the data to be transmitted of different time/frequency source block loads is identical or different.
It is described to select corresponding subcarrier for data to be transmitted in said program, including：
Subcarrier is selected in the time-domain symbol of the time/frequency source block, wherein for data to be transmitted in different time domain
The number of subcarriers selected on symbol is identical or different, and the sub-carrier positions selected on different time domain symbol are identical or different.
Fig. 2 is the flow diagram two of the data modulation method of the edge subband of the embodiment of the present invention, the number in this example
It is applied to transmitting node according to modulator approach, as shown in Fig. 2, the data modulation method of the edge subband includes the following steps：
Step 201：It is multiple time/frequency source blocks by edge sub-band division.
Here, the edge subband be transmission band on frequency domain near the subband of end positions.The edge subband packet
Containing k subcarrier, k is the integer more than or equal to 1.
It is p time/frequency source block by the edge sub-band division, p is the integer more than or equal to 1；Wherein, different time-frequency moneys
The number of subcarriers that source block includes is identical or different.
Step 202：For each time/frequency source block, pair of the sub-carrier positions and data in the time/frequency source block is determined
It should be related to.
In the present embodiment, the data can be the digital bit information that value is 0 or 1, can also be binary phase-shift key
Control (BPSK, Binary Phase Shift Keying), quadrature phase shift keying (QPSK, Quadrature Phase Shift
Keyin), the digital modulations information such as quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation), can be with
It is other data modes, collectively referred to here in as data.
Here, for each time/frequency source block, the sub-carrier positions and data in the time/frequency source block are determined respectively
Correspondence；Wherein, the position of single sub-carrier characterizes a modulation intelligence, i.e. single sub-carrier corresponds to a data, or
The position grouping of multiple subcarriers characterizes a modulation intelligence, i.e., the combination of multiple subcarriers corresponds to a data.It is the multiple
Combination one modulation intelligence of characterization of subcarrier can be that the combination of 2 subcarriers characterizes a modulation intelligence or 3 sons carry
The combination of combination one modulation intelligence of characterization or 4 subcarriers of wave characterizes modulation intelligence etc., similarly with such
It pushes away.
In the present embodiment, it is not limited to determine the correspondence of sub-carrier positions and data in single time/frequency source block,
The united mode of multiple time/frequency source blocks may be used, pair of sub-carrier positions and data is determined in united time/frequency source block
It should be related to.
Step 203：According to the correspondence of the sub-carrier positions and data, carried for the corresponding son of data to be transmitted selection
Wave.
In the present embodiment, based on the correspondence of sub-carrier positions and data described in step 202, exist for data to be transmitted
Subcarrier is selected in time-domain symbol.
Further, subcarrier is selected on the frequency domain of time-domain symbol.Wherein, the son selected on different time domain symbol carries
Wave number amount is identical or different；The sub-carrier positions selected on different time domain symbol are identical or different.
Step 204：Data to be transmitted is mapped on selected subcarrier.
In the present embodiment, the subcarrier selected loads data to be transmitted on edge subband；On edge subband not
Selected subcarrier not load data.
In the embodiment of the present invention, the data volume of the data to be transmitted of different time/frequency source block loads is identical or different.
In the embodiment of the present invention, for the time-domain OFDM symbol of load reference signal, including but not limited to following two places
Reason method：One, the edge subband no longer load data of the OFDM symbol of load reference signal；Two, the OFDM of load reference signal
The edge subband load data of symbol carries out data tune using the sub-carrier positions in addition to reference signal according to step 201-204
System.
Fig. 3 is that the flow of the data modulation method of the edge subband of the 5MHz bandwidth multicarrier systems of the embodiment of the present invention is shown
It is intended to, the data modulation method in this example is applied to transmitting node, as shown in figure 3, the data modulation methods of the edge subband
Method includes the following steps：
Step 301：It is multiple time/frequency source blocks by the edge sub-band division of 5MHz bandwidth multicarrier systems.
In embodiments of the present invention, 5MHz bandwidth LTE system occupies the frequency domain resource of 300 subcarriers for passing in total
Transmission of data, vacates the edge subbands of remaining 33 subcarriers at transmission band both ends, as protection interval, between sub-carriers
It is divided into 15kHz.According to embodiments of the present invention, by it is described include 33 subcarriers edge sub-band division be 4 time/frequency source blocks,
Each time/frequency source block includes 8 subcarriers.
Step 302：For each time/frequency source block, pair of the sub-carrier positions and data in the time/frequency source block is determined
It should be related to.
In the embodiment of the present invention, for 4 time/frequency source blocks described in step 301, each running time-frequency resource is determined respectively
The position of subcarrier in block and the correspondence of data.The position that table 1 gives single sub-carrier is corresponding with QPSK data
Relationship.
Table 1 (sub-carrier positions correspond to QPSK data)
In the present embodiment, there are the data of correspondence to be also possible that with sub-carrier positions：0 or 1 bit data,
The digital modulations data such as BPSK, QAM, the data of other forms.
Step 303：According to the correspondence of the sub-carrier positions and data, selected on the ofdm symbols for data to be transmitted
Select corresponding subcarrier.
In the present embodiment, by taking the third OFDM symbol of first time/frequency source block as an example, if load 4 is to be transmitted
QPSK data informations, respectivelyThen selection position phase
Corresponding subcarrier, including but not limited to following methods：Subcarrier is selected using the 2nd and the 4th data.According to step 302
The correspondence of middle table 1 should select the 3rd and the 6th sub- carrier load data.
Step 304：Data to be transmitted is mapped on selected subcarrier.
In the present embodiment, according to step 302,303 the methods, the 1st and the 3rd data are respectively mapped to subcarrier
3, on 6, meanwhile, subcarrier 3 and 6 indicates respectively dataWith
The present embodiment is not limited to the multicarrier system of 5MHz bandwidth, the arbitrary numbers such as 2.5MHz, 10MHz, 20MHz, 100MHz
It is worth the multicarrier system of bandwidth, the data modulation method of the edge subband described in the present embodiment similarly can be used.
Fig. 4 is the structure composition schematic diagram of the data modulating device of the edge subband of the embodiment of the present invention, as shown in figure 4,
Described device includes：
Selecting unit 41, for selecting subcarrier on the edge subband at transmission band both ends, wherein the subcarrier
Position characterizes modulation intelligence；
Modulation unit 42, for being modulated to data according to the position of selected subcarrier.
In the embodiment of the present invention, the position of the subcarrier characterizes modulation intelligence, including：
The position of single sub-carrier characterizes a modulation intelligence or the position grouping of multiple subcarriers characterizes a modulation
Information.
In the embodiment of the present invention, described device further includes：
Division unit 43, for being multiple time/frequency source blocks by edge sub-band division；
Determination unit 44 determines the position of the subcarrier in the time/frequency source block for being directed to each time/frequency source block
With the correspondence of data；
The selecting unit 41 is specifically used for the correspondence of position and data based on the subcarrier, is to be transmitted
Data select corresponding subcarrier；
The modulation unit 42, specifically for the data to be transmitted are mapped on selected subcarrier.
In the embodiment of the present invention, the division unit 43 is specifically used for edge sub-band division being p time/frequency source block, p
For the integer more than or equal to 1, wherein the number of subcarriers that different time/frequency source blocks include is identical or different.
In the embodiment of the present invention, the data volume of the data to be transmitted of different time/frequency source block loads is identical or different.
In the embodiment of the present invention, the selecting unit 41 is specifically used for for data to be transmitted in the time/frequency source block
Time-domain symbol on select subcarrier, wherein the number of subcarriers selected on different time domain symbol is identical or different, in difference
The sub-carrier positions selected in time-domain symbol are identical or different.
In practical application, the selecting unit 41, division unit 43, determination unit 44 can be by being located at edge subband
Data modulating device in central processing unit (Central Processing Unit, CPU) or microprocessor (Micro
Processor Unit, MPU) or digital signal processor (Digital Signal Processor, DSP) or scene can compile
The realizations such as journey gate array (Field Programmable Gate Array, FPGA).The modulation unit 42 can pass through modulation
Demodulator is realized.
It will be appreciated by those skilled in the art that the reality of each unit in the data modulating device of edge subband shown in Fig. 4
Existing function can refer to the associated description of the data modulation method of preceding edge subband and understand.The number of edge subband shown in Fig. 4
It can be realized by running on the program on processor according to the function of each unit in modulating device, can also pass through specific logic
Circuit and realize.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention can be used can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (12)
1. a kind of data modulation method of edge subband, which is characterized in that the method includes：
Subcarrier is selected on the edge subband at transmission band both ends, wherein the position of the subcarrier characterizes modulation intelligence；
Data are modulated according to the position of selected subcarrier.
2. according to the method described in claim 1, it is characterized in that, the subcarrier position characterize modulation intelligence, including：
The position of single sub-carrier characterizes a modulation intelligence or the position grouping of multiple subcarriers characterizes a modulation letter
Breath.
3. according to the method described in claim 1, it is characterized in that, described select son on the edge subband at transmission band both ends
Carrier wave is modulated data according to the position of selected subcarrier, including：
It is multiple time/frequency source blocks by edge sub-band division；
For each time/frequency source block, the position of the subcarrier in the time/frequency source block and the correspondence of data are determined；
The correspondence of position and data based on the subcarrier selects corresponding subcarrier for data to be transmitted；
The data to be transmitted are mapped on selected subcarrier.
4. according to the method described in claim 3, it is characterized in that, it is described by edge sub-band division be multiple time/frequency source blocks,
Including：
It is p time/frequency source block by edge sub-band division, p is integer more than or equal to 1, wherein different time/frequency source blocks include
Number of subcarriers it is identical or different.
5. method according to claim 3 or 4, which is characterized in that the data to be transmitted of different time/frequency source block loads
Data volume is identical or different.
6. according to the method described in claim 3, it is characterized in that, described select corresponding subcarrier for data to be transmitted,
Including：
Subcarrier is selected in the time-domain symbol of the time/frequency source block, wherein for data to be transmitted in different time domain symbol
The number of subcarriers of upper selection is identical or different, and the sub-carrier positions selected on different time domain symbol are identical or different.
7. a kind of data modulating device of edge subband, which is characterized in that described device includes：
Selecting unit, for selecting subcarrier on the edge subband at transmission band both ends, wherein the position table of the subcarrier
Levy modulation intelligence；
Modulation unit, for being modulated to data according to the position of selected subcarrier.
8. device according to claim 7, which is characterized in that the position of the subcarrier characterizes modulation intelligence, including：
The position of single sub-carrier characterizes a modulation intelligence or the position grouping of multiple subcarriers characterizes a modulation letter
Breath.
9. device according to claim 7, which is characterized in that described device further includes：
Division unit, for being multiple time/frequency source blocks by edge sub-band division；
Determination unit determines position and the data of the subcarrier in the time/frequency source block for being directed to each time/frequency source block
Correspondence；
The selecting unit is specifically used for the correspondence of position and data based on the subcarrier, is data to be transmitted
Select corresponding subcarrier；
The modulation unit, specifically for the data to be transmitted are mapped on selected subcarrier.
10. device according to claim 9, which is characterized in that the division unit is specifically used for edge sub-band division
For p time/frequency source block, p is the integer more than or equal to 1, wherein the number of subcarriers that different time/frequency source blocks include it is identical or
It is different.
11. device according to claim 9 or 10, which is characterized in that the data to be transmitted of different time/frequency source block loads
Data volume it is identical or different.
12. device according to claim 9, which is characterized in that the selecting unit is specifically used for being data to be transmitted
Subcarrier is selected in the time-domain symbol of the time/frequency source block, wherein the number of subcarriers selected on different time domain symbol
Identical or different, the sub-carrier positions selected on different time domain symbol are identical or different.
Priority Applications (2)
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| CN201710127897.8A CN108540418B (en) | 2017-03-06 | 2017-03-06 | Data modulation method and device for edge sub-band |
| PCT/CN2018/078049 WO2018161875A1 (en) | 2017-03-06 | 2018-03-05 | Data modulation method and device for edge sub-band, and computer storage medium |
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| CN201710127897.8A CN108540418B (en) | 2017-03-06 | 2017-03-06 | Data modulation method and device for edge sub-band |
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| WO2018161875A1 (en) | 2018-09-13 |
| CN108540418B (en) | 2022-05-03 |
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