CN108462664A - The launching technique and device of multi-carrier data - Google Patents
The launching technique and device of multi-carrier data Download PDFInfo
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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
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] 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
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
- H04L27/263—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators modification of IFFT/IDFT modulator for performance improvement
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Abstract
The present invention relates to the communications fields, disclose a kind of launching technique and device of multi-carrier data.In embodiment of the present invention, it is modulated mapping to sent the first data, obtains multi-carrier data to be sent；2 are carried out to multi-carrier dataNPoint quick Fourier inverse transformation with rise sampling processing, obtain the second data, wherein N is integer, and 3 ＜ N ＜ 7；Transmitting pretreatment is carried out to the second data, and emits pretreated data.Embodiment of the present invention passes through 2NPoint quick Fourier inverse transformation and liter sampling processing, instead of 128 point quick Fourier inversion process in conventional method, not only greatly reduce terminal device transmitting multi-carrier data when computation complexity and calculation amount, and reduce the area of inverse fast Fourier transform processing chip, operational capability requirement, power consumption and cost etc., thereby reduce the cost and power consumption of terminal device.
Description
Technical field
The present invention relates to the communications field, more particularly to the launching technique and device of a kind of multi-carrier data.
Background technology
NB-IoT (Narrow Band Internet of Things, narrowband Internet of Things) is 3GPP (3rd
Generation Partnership Project, third generation partner program) the newest proposition of tissue specifically in object
The newest protenchyma networking protocol of networking, the agreement is based on ripe LTE (Long Term Evolution, long term evolution)
System, and on this basis according to the communication feature of Internet of Things, significantly function and performance are carried out to protocol layer and physical layer
Cut out, to enable NB-IoT terminals preferably to realize wide covering, low-power consumption, low cost and the targets such as connect greatly.
It is provided according to 3GPP agreements, there are two types of formats to define for the uplink of NB-IoT, and one is single carrier forms, including sub- load
Wave spacing is two kinds of situations of 3.75kHz and 15kHz, and another kind is overloading waveshape, wherein the subcarrier spacing of overloading waveshape
For 15kHz, it is 180kHz that configurable number of sub carrier wave has several situations such as 1,3,6,12, NB-IoT system bandwidths respectively, i.e.,
The case where be up to 12 subcarriers are 15kHz for subcarrier spacing, has 12 sub-carrier configuring conditions, as indicated 1 institute
Show.
Table 1
Usually during hardware realization, in order to reduce computation complexity and reduce power consumption, for different bandwidth and sampling
Frequency can use the FFT (Fast Fourier Transformation, Fast Fourier Transform (FFT)) of different points to be calculated.
According to the protocol parameter of NB-IoT, the integral multiple that 1.92MHz can be used in Base-Band Processing is sampled, it is contemplated that NB-IoT low-power consumption
With the requirement of low computation complexity, usual base band is calculated using 1.92MHz samplings and 128 point FFT.At this point, cyclic prefix
Length be respectively 10 (corresponding first Slot symbol) and 9 (second to the 7th Slot symbol of correspondence).Because of cyclic prefix
Number be still integer, so using the sample frequency, it is ensured that OFDM (Orthogonal Frequency
Division Multiplexing, orthogonal frequency division multiplexing) length of symbol meets the symbol lengths and frame of NB-IoT protocol definitions
Length, using the transmitting processing of this conventional method as shown in Figure 1, receiving processing as shown in Figure 2.
Wherein, for terminal transmitter, channel data to be transmitted is after ovennodulation maps, according to the resource of channel
Distribution and scheduling, enter IFFT (Inverse Fast Fourier Transform, inverse fast Fourier transform) module together,
For 128 points of IFFT operations, useful at most only 12 subcarriers in practice, remaining is required to zero filling processing, then
According to protocol specification, 10 are added to each OFDM symbol or 9 length datas regard cyclic prefix, module is adjusted into frequency deviation
The frequency offset processing for carrying out 1/2 subcarrier handles by beamforming filter and carries out transmitting output.For receiver, seek
Frame head and timing are looked for, cyclic prefix is then removed according to agreement, data are subjected to 128 FFT transform, you can obtain channel data
Or reference signal.
However, during realizing invention, the inventors of the present application found that the transmitting processing of above-mentioned conventional method,
It when carrying out IFFT operations, is added to a large amount of invalid datas zero and carries out occupy-place, it is complicated to bring huge calculating to terminal transmitter
Degree increases the calculation amount of terminal and realizes the requirement of the chip of above-mentioned IFFT operations, core is handled to increase terminal IFFT
Realization area, power consumption and the cost of piece.
Invention content
Embodiment of the present invention is designed to provide a kind of launching technique and device of multi-carrier data, passes through 2NPoint is fast
Fast inverse Fourier transform and liter sampling processing, instead of 128 point quick Fourier inversion process in conventional method, not only greatly
Computation complexity when reducing terminal device transmitting multi-carrier data and calculation amount, and reduce inverse fast Fourier transform
Realization area, operational capability requirement, power consumption and cost of processing chip etc., thereby reduce the cost and power consumption of terminal device.
In order to solve the above technical problems, embodiments of the present invention provide a kind of launching technique of multi-carrier data, packet
It includes：
It is modulated mapping to sent the first data, obtains multi-carrier data to be sent；
2 are carried out to the multi-carrier dataNPoint quick Fourier inverse transformation and liter sampling processing, obtain the second data,
In, N is integer, and 3 ＜ N ＜ 7；
Transmitting pretreatment is carried out to second data, and emits pretreated data.
Embodiments of the present invention additionally provide a kind of emitter of multi-carrier data, including：
Modulation mapping block obtains overloading wave number to be sent for being modulated mapping to sent the first data
According to；
Multi-carrier data processing module, for carrying out 2 to the multi-carrier dataNPoint quick Fourier inverse transformation is adopted with liter
Sample processing, obtains the second data, wherein 3 ＜ N ＜ 7；
Transmitting module for carrying out transmitting pretreatment to second data, and emits pretreated data.
Embodiment of the present invention carries out 2 in terms of existing technologies, to multi-carrier dataNPoint quick Fourier inverse transformation
With a liter sampling processing, the second data are obtained, wherein N is integer, and 3 ＜ N ＜ 7, and 16,32 or 64 are first carried out to multi-carrier data
Point quick Fourier inverse transformation, then a liter sampling processing is carried out, at 128 point quick Fourier inverse transformations in conventional method
Reason greatly reduces the points for carrying out inverse fast Fourier transform operation, to reduce inverse fast Fourier transform processing
Operand, thereby reduce the area of the chip of terminal processes inverse fast Fourier transform operation, operational capability requires, power consumption and
Cost etc..
In addition, described carry out 2 to the multi-carrier dataNPoint quick Fourier inverse transformation, specifically includes：With
(1.92MHz*2NThe baseband sampling frequency of)/128 pre-processes the multi-carrier data；Pretreated data are carried out
2NPoint quick Fourier inverse transformation.According to the corresponding baseband sampling frequency 1.92MHz of 128 point IFFT, obtain being suitable for 2NPoint IFFT's
Baseband sampling frequency (1.92MHz*2N)/128 ensure that the consistency of IFFT point number and baseband sampling frequency correspondence, from
And it ensure that less points (2NPoint) IFFT feasibility.
In addition, described liter of sampling processing is 128/2NLiter sampling processing again.Ensure to recycle when follow-up addition cyclic prefix
The length of prefix is integer, and then ensures that the OFDM symbol length formed and frame length meet NB-IoT agreements regulation.
In addition, the N values are 4.Using the IFFT of minimal point (16 points), to reduce progress to the greatest extent
Operand when IFFT processing.
Description of the drawings
Fig. 1 is the transmitting processing schematic diagram of single carrier data in the prior art；
Fig. 2 is the reception processing schematic diagram of single carrier data in the prior art；
Fig. 3 is the launching technique flow chart according to a kind of multi-carrier data of first embodiment of the invention；
Fig. 4 is the launching technique flow chart according to a kind of multi-carrier data of second embodiment of the invention；
Fig. 5 is the schematic diagram of the first data to be sent emulated according to second embodiment of the invention；
Fig. 6 is the schematic diagram of the multi-carrier data to be sent emulated according to second embodiment of the invention；
Fig. 7 is the 16 point IFFT amplitude schematic diagrames emulated according to second embodiment of the invention；
Fig. 8 is that 128 point IFFT amplitude schematic diagrames after sampling are risen according to 8 times that second embodiment of the invention emulates；
Fig. 9 is the 128 point FFT amplitude schematic diagrames of base station end emulated according to second embodiment of the invention；
Figure 10 is the schematic diagram for the initial data that the base station end emulated according to second embodiment of the invention is got；
Figure 11 is the structural schematic diagram according to a kind of emitter of multi-carrier data of third embodiment of the invention；
Figure 12 is the structural schematic diagram according to a kind of emitter of multi-carrier data of four embodiment of the invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to each reality of the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order to make the reader understand this application better, many technical details are proposed.But even if without these technical details and base
In the various changes and modifications of following embodiment, the application technical solution claimed can also be realized.
First embodiment of the invention is related to a kind of launching technique of multi-carrier data.Detailed process is as shown in Figure 3.
In step 301, it is modulated mapping to sent the first data, obtains multi-carrier data to be sent.
Specifically, according to the common modulation mapping process of terminal transmission data, multicarrier frequency domain number to be sent is generated
According to.
In step 302,2 are carried out to multi-carrier dataNPoint quick Fourier inverse transformation and liter sampling processing, obtain second
Data.
Specifically, first carrying out 2 to multi-carrier dataNPoint quick Fourier inverse transformation, wherein N is integer, and 3 ＜ N ＜
7, namely 16 or 32 or 64 point quick Fourier inverse transformations are first carried out to multi-carrier data, then the mode of liter sampling processing is carried out,
The points for carrying out IFFT operations are not only greatly reduced, but also by way of liter sampling processing, has ensured follow-up and added cycle
The length of cyclic prefix is integer when prefix, and then ensure that the OFDM symbol length to be formed and frame length meet NB-IoT agreements
Regulation, finally ensure that the feasibility of the program.With 2NPoint quick Fourier inverse transformation and the technical solution for rising sampling processing, generation
For 128 point quick Fourier inversion process in conventional method, greatly reduces terminal and carry out at inverse fast Fourier transform
The operand of reason thereby reduces the area of the chip of terminal processes inverse fast Fourier transform operation, operational capability requires, work(
Consumption and cost etc., thereby reduce the cost and power consumption of entire terminal device.
In step 303, transmitting pretreatment is carried out to the second data, and emits pretreated data.
Specifically, according to the universal preprocessing process of terminal transmission data, the transmitting data for meeting launch requirements are formed,
And sent by rf terminal, to be finally completed the transmitting processing of multi-carrier data.
Compared with prior art, in the present embodiment, 2 are carried out to multi-carrier dataNPoint quick Fourier inverse transformation with
Rising sampling processing, wherein N is integer, and 3 ＜ N ＜ 7, instead of 128 point quick Fourier inversion process in conventional method,
The points for carrying out inverse fast Fourier transform operation are not only greatly reduced, but also by way of liter sampling processing, after guarantee
The length of cyclic prefix is integer when having continued addition cyclic prefix, and then ensure that the OFDM symbol length to be formed and frame length
Meet NB-IoT agreements regulation, finally ensure that the feasibility of the program, and it is inverse to eventually reduce terminal processes fast Fourier
The area of the chip of transform operation, operational capability require, power consumption and cost etc., thereby reduce the cost of entire terminal device with
Power consumption.
Second embodiment of the invention is related to a kind of launching technique of multi-carrier data.Second embodiment is implemented first
It is further improved on the basis of mode, mainly thes improvement is that：In second embodiment of the invention, specifically give
2NThe process of point quick Fourier inverse transformation, the optimal value of N and the multiple for rising sampling, as shown in Figure 4.
In step 401, it treats and is modulated mapping to sent the first data, obtain overloading wave number to be sent
According to.
In step 402, with (1.92MHz*2NThe baseband sampling frequency of)/128 locates the multi-carrier data in advance
Reason.
Specifically, according to the corresponding baseband sampling frequency 1.92MHz of 128 point IFFT, obtain being suitable for 2NThe base of point IFFT
Band sample frequency is (1.92MHz*2N)/128, wherein N is integer, and 3 ＜ N ＜ 7, and adaptability is carried out to baseband sampling frequency
Adjustment, ensure that the consistency of IFFT point number and baseband sampling frequency correspondence, so ensure that multi-carrier data into
Capable less points (2NPoint) inverse fast Fourier transform feasibility.
Furthermore, the optimal value of N is 4, since NB-IoT system bandwidths are 180kHz, and overloading waveshape
Subcarrier spacing is 15kHz, and it is 4 that then NB-IoT systems, which are up to 12 subcarriers for sending multi-carrier data, N values,
When, 2N=16,16 are more than 12, can not only ensure the integrality of multi-carrier data to be sent, and 16 are greater than 12 most
When the integral number power value namely N values of small 2 are 4, the IFFT operations of the minimal point met the requirements may be implemented, to most
The operand of big degree reduced when carrying out IFFT processing.
In step 403,2 are carried out to pretreated dataNPoint quick Fourier inverse transformation.
Specifically, carrying out 2 to pretreated dataNPoint quick Fourier inverse transformation, by overloading wave number to be sent
According to time domain is transformed to, consequently facilitating respective handling of the progress multi-carrier data in time domain.
In step 404, a liter sampling is carried out to the data after inverse fast Fourier transform, obtains the second data.
Specifically, 128 point IFFT operations in conventional method, are equivalent to and have carried out 16 times to 2048 general point IFFT
It is down-sampled, 2 are carried out nowNPoint IFFT operations are equivalent to and have carried out 128/2 again on the basis of 128 pointNAgain down-sampled, works as N
When value is 4,128/2N=8, i.e., 8 times down-sampled has been carried out again, and the circulating prefix-length then resulted in table 1 also can be corresponding
Become 160/ ((2048/128) * (128/2N)) or 144/ ((2048/128) * (128/2N)), when N values are 4, in table 1
Circulating prefix-length be 1.25 or 1.125, it is integer to then result in the length of cyclic prefix not, does not meet NB-IoT associations then
OFDM symbol length and frame length as defined in view, so needing to carry out a liter sampling to the data after IFFT, wherein rise sampling times
Number is 128/2N, when N values are 4, it is 8 to rise sampling multiple, that is, carries out 8 times of liter sampling, and to have ensured follow-up, addition recycles
The length of cyclic prefix is integer when prefix, and then ensure that the OFDM symbol length to be formed and frame length meet NB-IoT agreements
Regulation, finally ensure that the feasibility of the program.
It further says, below with the modulation operation of 1 OFDM symbol, i.e., for 128 point IFFT operations, briefly introduces and adopt
When with the conventional method of 128 point IFFT with the method in embodiment of the present invention is used, corresponding complexity is adopted first
When with the conventional method of 128 point IFFT, corresponding complex multiplication is：Corresponding complex addition is：Wherein, N=128；When secondly, using the method in embodiment of the present invention, corresponding complex multiplication
For：Corresponding complex addition is：Wherein, N=16, it can be seen that, using this hair
When the method for bright embodiment, the complexity of complex multiplication and complex addition is the 1/14 of conventional method, required storage
IFFT coefficient tables are also only the 1/8 of conventional method, greatly reduce chip and realize area, power consumption and cost.
In step 405, cyclic prefix is added to the second data.
Specifically, adding the cyclic prefix of preset length, concrete operations and prior art phase at the end of the second data
Together, details are not described herein.
In a step 406, frequency deviation adjustment and pulse shape filter are carried out.
Specifically, the carry out frequency deviation adjustment to the data after addition cyclic prefix and pulse shape filter, concrete operations
Same as the prior art, details are not described herein.
Further, the modeling and simulating of the multicarrier transmitter of embodiment of the present invention is given below, preferably to explain
That states the technical solution of embodiment of the present invention can property row, it is assumed that the terminal transmitter use of NB-IoT is needed to 12 modulation symbols
Number emitted, for convenience of explanation, it is assumed that this 12 modulation symbols are real number (consistent with complex result), are one section random
Integer carries out zero-adding processing to data, generates 16 points of number as shown in figure 5, according to the resource impact agreement of NB-IoT agreements
According to, as shown in fig. 6, according to the technical solution of embodiment of the present invention, the map of magnitudes after the IFFT operations of 16 points of progress, such as Fig. 7
It is shown, 8 times are carried out again to the data after IFFT operations and rises sampling, then, 16 points of IFFT map of magnitudes becomes 128 points of IFFT width
Degree figure needs the operation of the addition for carrying out cyclic prefix and frequency deviation adjustment as shown in figure 8, being provided according to NB-IoT agreements, for
8 times of aliasings risen caused by sampling, can be uniformly filtered by last beamforming filter.
For base station receives, the signal of the transmitter transmission using the technical solution of embodiment of the present invention is received
Afterwards, frame head and Timing Processing are found using conventional method, after then removing cyclic prefix according to protocol requirement, then carries out at 128 points
After FFT operations, the map of magnitudes of obtained real part, as shown in Figure 9, wherein data are illustrated with real number when transmitting, can be with by observation
Find out, after 128 point FFT operations, data be using 16 units as the periodic sequence in period, and 16 units with transmitting
The sequence that machine adjusts after resource impact is consistent, and then, receiving terminal carries out zero-sum according to NB-IoT agreements and reorders
Solution resource impact after, you can obtain original data, as shown in Figure 10.
In the present embodiment, 2 are shown in particularNThe process of point quick Fourier inverse transformation, N be 4 optimal value and
The multiple etc. for rising sampling, operand when IFFT processing is carried out to reduce to the greatest extent, and ensure that the technical solution
Feasibility.
The step of various methods divide above, be intended merely to describe it is clear, when realization can be merged into a step or
Certain steps are split, multiple steps are decomposed into, as long as including identical logical relation, all in the protection domain of this patent
It is interior；To either adding inessential modification in algorithm in flow or introducing inessential design, but its algorithm is not changed
Core design with flow is all in the protection domain of the patent.
Third embodiment of the invention is related to a kind of emitter of multi-carrier data, as shown in figure 11, including：Modulation is reflected
Penetrate module 111, multi-carrier data processing module 112 and transmitting module 113.
Modulation mapping block 111 obtains multicarrier to be sent for being modulated mapping to sent the first data
Data.
Multi-carrier data processing module 112, for carrying out 2 to multi-carrier dataNPoint quick Fourier inverse transformation is adopted with liter
Sample processing, obtains the second data, wherein 3 ＜ N ＜ 7.
Transmitting module 113 for carrying out transmitting pretreatment to the second data, and emits pretreated data.
It is not difficult to find that present embodiment is system embodiment corresponding with first embodiment, present embodiment can be with
First embodiment is worked in coordination implementation.The relevant technical details mentioned in first embodiment still have in the present embodiment
Effect, in order to reduce repetition, which is not described herein again.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in
In first embodiment.
It is noted that each module involved in present embodiment is logic module, and in practical applications, one
A logic unit can be a physical unit, can also be a part for a physical unit, can also be with multiple physics lists
The combination of member is realized.In addition, in order to protrude the innovative part of the present invention, it will not be with solution institute of the present invention in present embodiment
The technical issues of proposition, the less close unit of relationship introduced, but this does not indicate that there is no other single in present embodiment
Member.
Four embodiment of the invention is related to a kind of emitter of multi-carrier data.4th embodiment is implemented in third
It is further improved on the basis of mode, mainly thes improvement is that：In four embodiment of the invention, include not only
Mapping block 111, multi-carrier data processing module 112 and transmitting module 113 are modulated, multi-carrier data processing is also shown in particular
Module 112 and each submodule included by transmitting module 113, wherein multi-carrier data processing module 112 specifically includes：Pre- place
Submodule 1121 and inverse fast Fourier transform submodule 1122 are managed, transmitting module 113 specifically includes：Cyclic prefix adds submodule
Block 1131 and adjustment submodule 1132, as shown in figure 12.
Modulation mapping block 111 obtains multicarrier to be sent for being modulated mapping to sent the first data
Data.
Multi-carrier data processing module 112, for carrying out 2 to multi-carrier dataNPoint quick Fourier inverse transformation is adopted with liter
Sample processing, obtains the second data, wherein 3 ＜ N ＜ 7.
Submodule 1121 is pre-processed, is used for multi-carrier data with (1.92MHz*2NThe sample frequency of)/128 is located in advance
Reason.
Inverse fast Fourier transform submodule 1122, for carrying out 2 to pretreated dataNPoint quick Fourier inversion
It changes.
Transmitting module 113 for carrying out transmitting pretreatment to the second data, and emits pretreated data.
Cyclic prefix adds submodule 1131, the cyclic prefix for the second data to be added with preset length.
Submodule 1132 is adjusted, for carrying out frequency deviation adjustment and pulse shape filter to the data after addition cyclic prefix.
Since second embodiment is corresponded with present embodiment, present embodiment can be mutual with second embodiment
Match implementation.The relevant technical details mentioned in second embodiment are still effective in the present embodiment, implement second
The attainable technique effect of institute similarly may be implemented in the present embodiment in mode, no longer superfluous here in order to reduce repetition
It states.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in second embodiment.
It will be appreciated by those skilled in the art that it is that can pass through to implement the method for the above embodiments
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that one
A equipment (can be microcontroller, chip etc.) or processor (processor) execute each embodiment the method for the application
All or part of step.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of launching technique of multi-carrier data, which is characterized in that including：
It is modulated mapping to sent the first data, obtains multi-carrier data to be sent；
2 are carried out to the multi-carrier dataNPoint quick Fourier inverse transformation with rise sampling processing, obtain the second data, wherein N is
Integer, and 3 ＜ N ＜ 7；
Transmitting pretreatment is carried out to second data, and emits pretreated data.
2. the launching technique of multi-carrier data according to claim 1, which is characterized in that described to the multi-carrier data
Carry out 2NPoint quick Fourier inverse transformation, specifically includes：
With (1.92MHz*2NThe baseband sampling frequency of)/128 pre-processes the multi-carrier data；
2 are carried out to pretreated dataNPoint quick Fourier inverse transformation.
3. the launching technique of multi-carrier data according to claim 2, which is characterized in that described liter of sampling processing is 128/
2NLiter sampling processing again.
4. the launching technique of multi-carrier data according to any one of claim 1 to 3, which is characterized in that the N values
It is 4.
5. the launching technique of multi-carrier data according to claim 1, which is characterized in that it is described to second data into
Row transmitting pretreatment, specifically includes：
Second data are added with the cyclic prefix of preset length, and frequency deviation adjustment is carried out to the data after addition cyclic prefix
And pulse shape filter.
6. a kind of emitter of multi-carrier data, which is characterized in that including：
Modulation mapping block obtains multi-carrier data to be sent for being modulated mapping to sent the first data；
Multi-carrier data processing module, for carrying out 2 to the multi-carrier dataNAt point quick Fourier inverse transformation and liter sampling
Reason, obtains the second data, wherein 3 ＜ N ＜ 7；
Transmitting module for carrying out transmitting pretreatment to second data, and emits pretreated data.
7. the emitter of multi-carrier data according to claim 6, which is characterized in that the multi-carrier data handles mould
Block specifically includes：Pre-process submodule and inverse fast Fourier transform submodule；
The pretreatment submodule, for (1.92MHz*2NThe baseband sampling frequency of)/128 carries out the multi-carrier data
Pretreatment；
The inverse fast Fourier transform submodule, for carrying out 2 to pretreated dataNPoint quick Fourier inverse transformation.
8. the emitter of multi-carrier data according to claim 7, which is characterized in that the multi-carrier data handles mould
The liter sampling processing of block is 128/2NLiter sampling processing again.
9. according to the emitter of claim 6 to 8 any one of them multi-carrier data, which is characterized in that the N values are
4。
10. the emitter of multi-carrier data according to claim 6, which is characterized in that the transmitting module specifically wraps
It includes：Cyclic prefix adds submodule and adjustment submodule；
The cyclic prefix adds submodule, the cyclic prefix for second data to be added with preset length；
The adjustment submodule, for carrying out frequency deviation adjustment and pulse shape filter to the data after addition cyclic prefix.
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