CN106656892A - Method and device of transmitting data - Google Patents
Method and device of transmitting data Download PDFInfo
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- CN106656892A CN106656892A CN201510724560.6A CN201510724560A CN106656892A CN 106656892 A CN106656892 A CN 106656892A CN 201510724560 A CN201510724560 A CN 201510724560A CN 106656892 A CN106656892 A CN 106656892A
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000001914 filtration Methods 0.000 claims abstract description 74
- 238000013507 mapping Methods 0.000 claims abstract description 51
- 230000005540 biological transmission Effects 0.000 claims description 94
- 230000009466 transformation Effects 0.000 claims description 58
- 238000001228 spectrum Methods 0.000 claims description 24
- 230000004044 response Effects 0.000 claims description 21
- 241001269238 Data Species 0.000 claims description 16
- 125000004122 cyclic group Chemical group 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 11
- 230000035939 shock Effects 0.000 claims description 11
- 238000000844 transformation Methods 0.000 claims description 11
- 230000004913 activation Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 10
- 230000011218 segmentation Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000005055 memory storage Effects 0.000 claims description 2
- 238000005070 sampling Methods 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 description 21
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- 238000005516 engineering process Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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- Signal Processing (AREA)
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Abstract
The invention provides a method and a device of transmitting data. After frequency domain filtering and frequency domain mapping of various sub-band signals are executed, the data rates of the various sub-band signals are unified by the inverse Fourier transform, and therefore the filtering of the various sub-band signals is executed at a low sampling rate. Compared with time domain filtering of a prior art and the filtering of the various sub-bands required to be carried out at the high sampling rate according to the prior art, complexity of an F-OFDM transmitter is effectively reduced.
Description
Technical field
The present embodiments relate to the communication technology, more particularly to a kind of method and apparatus for sending data.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing, abbreviation OFDM)
It is a kind of multi-carrier modulation technology being applied widely.The main thought of OFDM technology is：Will letter
Road is divided into some orthogonal sub-channels, and high-speed data signal is converted into parallel low speed sub-data flow, modulation
Transmitted on every sub-channels.Why OFDM technology is widely used, and main reason is that it
With advantages below：The higher availability of frequency spectrum, can be effective against frequency selective fading channels, and
And by introducing Cyclic Prefix (cyclic prefix, abbreviation CP), intersymbol interference (Inter can be eliminated
Symbol Interference, abbreviation ISI), while receiver can adopt fairly simple single tap equalization
Algorithm.
But with single-carrier system ratio, ofdm system also have some problems need solve.Ofdm system
One of them has the disadvantage that it requires that different intersubbands reach strict Frequency Synchronization and the reasonable time is same
Step.This requires that the subcarrier spacing of OFDM, symbol lengths, CP length are needed in whole system band
It is consistent in width, the synchronization for accomplishing time and frequency is difficult otherwise on different sub-band.
OFDM (Filtered OFDM, abbreviation F-OFDM) based on sub-band filter is used as a kind of new more
Carrier modulation technique, can use different subcarrier spacings, symbol lengths, CP length in different sub-band
The parameters such as degree, and the method there is provided the intersymbol interference that wave filter brings is solved.Fig. 1 is related skill
F-OFDM transmitter architectures schematic diagram in art, as shown in figure 1, system bandwidth is divided into N number of subband,
Each subband independently carries out subcarrier maps, inverse fast Fourier transform (Inverse Fast Fourier
Transform, abbreviation IFFT), plus CP and filtering operation, finally merge transmission.For every
For height band, its subcarrier spacing, symbol lengths, CP length can be self-adaptative adjustment, with
Adapt to the channel scenario and type of service of different user devices (User Equipment, abbreviation UE).
Because the signal of each subband is finally directly combined, therefore their sample rate needs are
Identical, it means that although the bandwidth of each subband is possible and little, need a high sampling rate
Wave filter.For example, it is assumed that total system bandwidth is 80MHz, the son of 4 20MHz is divided into
Band, subcarrier spacing is 15kHz, it is assumed that the sample rate of output is 30.72MHz, then 4 subbands are all needed
2048 points of IFFT, the filtering of each subband is adopted to be required for being operated in the sample rate of 30.72MHz,
Generally increased complexity.
The content of the invention
The method and apparatus for sending data provided in an embodiment of the present invention, can effectively reduce F-OFDM and send out
Penetrate the complexity of machine.
A kind of first aspect, there is provided method of transmission data, including：
At least two subband signals are generated, at least two subband signal includes data to be sent；
Respectively frequency domain filtering is carried out at least two subband signal, obtain at least two subbands letter
Number corresponding frequency-region signal；
Respectively frequency domain mapping is carried out to the corresponding frequency-region signal of at least two subband signal, obtain described
The corresponding frequency-region signal of data to be sent；
First inverse Fourier transform is carried out to the corresponding frequency-region signal of the data to be sent, transmitting letter is obtained
Number；
Send the transmission signal.
It is described in first aspect in the first possible implementation with reference to the implementation of first aspect
Respectively frequency domain filtering is carried out at least two subband signal, including：It is sub by described at least two respectively
Each subband signal is divided into multiple data segments in band signal；Respectively to every at least two subband signal
The data segment of individual subband signal carries out Fourier transformation, wherein, at least two subband signal arbitrarily
Ratio between the points of the corresponding Fourier transformation of two subband signals is equal to any two subband signal
Data rate between ratio；Respectively at least two subband signal after Fourier transformation
In the data segment of each subband signal carry out frequency domain filtering.
With reference to first aspect or first aspect the first possible implementation, in second of first aspect
It is described to send the transmission signal in possible implementation, including：To the number in the transmission signal
Data merging is carried out according to section；Data is activation is carried out to the transmission signal after data merge.
With reference to second possible implementation of first aspect or first aspect, first aspect the third
It is described to be respectively divided into each subband signal at least two subband signal in possible implementation
Multiple data segments, including：Respectively in the head addition T-1 individual 0 of at least two subband signal, wherein
T is the shock response length that at least two subband signal distinguishes corresponding wave filter；To add respectively
At least two subband signal afterwards is divided into the data segment that multiple length are L+T-1, and wherein L is just whole
Number, and there is T-1 overlapped data between adjacent two data section；Wherein, at least two subband
The ratio of the corresponding T-1 of any two subband signal and the ratio of L+T-1 are equal in signal, and are equal to
The ratio of the data rate of any two subband signal.
With reference to first aspect or first aspect the first to the third arbitrary possible implementation,
On the one hand in the 4th kind of possible implementation, it is described respectively at least two subband signal each
The data segment of subband signal carries out Fourier transformation, including：Respectively according at least two subband signal
Data segment, length L+T-1 determine points P of Fourier transformation, wherein P=L+T-1；Respectively to described
Each data segment of at least two subband signals carries out P point Fourier transformations.
With reference to first aspect or first aspect the first to the 4th kind of arbitrary possible implementation,
On the one hand it is described that the corresponding frequency-region signal of the data to be sent is entered in the 5th kind of possible implementation
The inverse Fourier transform of row first, including：M points are carried out to the corresponding frequency-region signal of the data to be sent
First inverse Fourier transform, wherein the M and arbitrary subband signal pair at least two subband signal
Ratio between the points P of the Fourier transformation answered, equal to data rate and this of the transmission signal
Ratio between the data rate of one subband signal.
With reference to first aspect or first aspect the first to the 5th kind of arbitrary possible implementation,
On the one hand in the 6th kind of possible implementation, the data segment in the transmission signal carries out data
Merge, including：According to the value of the corresponding P and T of arbitrary subband signal at least two subband signal
And formulaDetermine the front K data of each data segment in the transmission signal；Reject institute
State the front K data of each data segment in transmission signal；By in the transmission signal each data segment it is surplus
Remainder is according to sequential concatenation.
With reference to first aspect or first aspect the first to the 6th kind of arbitrary possible implementation,
On the one hand in the 7th kind of possible implementation, at least two subband signals of the generation, including：By institute
State data to be sent and be divided at least two subband datas；At least two subband data is entered respectively
Row carrier wave maps；At least two subband data after carrier wave maps is carried out in second Fu respectively
Leaf inverse transformation, wherein, corresponding second Fourier of arbitrary subband data at least two subband data
The points of inverse transformation determine according to the data rate of the corresponding subband signal of the arbitrary subband data；It is right respectively
At least two subband data after the second inverse Fourier transform adds Cyclic Prefix, generates corresponding
Subband signal.
With reference to first aspect or first aspect the first to the 7th kind of arbitrary possible implementation,
On the one hand in the 8th kind of possible implementation, arbitrary subband signal at least two subband signal
Data rate determines according to the bandwidth of the subband signal.
With reference to first aspect or first aspect the first to the 8th kind of arbitrary possible implementation,
On the one hand it is described corresponding at least two subband signal respectively in the 9th kind of possible implementation
Frequency-region signal carries out frequency domain mapping, including：By the effective band of at least two subband signal according to frequency
Spectrum mapping ruler is mapped in successively on different frequencies.
With reference to first aspect or first aspect the first to the 9th kind of arbitrary possible implementation,
On the one hand in the tenth kind of possible implementation, the frequency spectrum mapping ruler is two neighboring subband signal
Protection interval is reserved between effective band.
A kind of second aspect, there is provided device of transmission data, including：
Subband signal signal generating unit, for generating at least two subband signals, at least two subbands letter
Number include data to be sent；
Frequency domain filtering unit, at least two subband signal carrying out frequency domain filtering respectively, obtains
The corresponding frequency-region signal of at least two subband signal；
Frequency domain map unit, for carrying out to the corresponding frequency-region signal of at least two subband signal respectively
Frequency domain maps, and obtains the corresponding frequency-region signal of the data to be sent；
First inverse Fourier transform unit, to the corresponding frequency-region signal of the data to be sent first Fu is carried out
In leaf inverse transformation, obtain transmission signal；
Transmitting element, for sending the transmission signal.
It is described in second aspect in the first possible implementation with reference to the implementation of second aspect
Frequency domain filtering unit includes：Data segmentation module, for respectively will be every at least two subband signal
Individual subband signal is divided into multiple data segments；Fourier transformation module, for sub to described at least two respectively
The data segment of each subband signal carries out Fourier transformation in band signal, wherein, at least two subband
Ratio in signal between the points of the corresponding Fourier transformation of any two subband signal be equal to this any two
Ratio between the data rate of individual subband signal；Filtration module, for respectively to through Fourier transformation
The data segment of each subband signal carries out frequency domain filtering at least two subband signal afterwards.
With reference to second aspect or second aspect the first possible implementation, in second of second aspect
In possible implementation, the transmitting element includes：Data combiners block, for the transmitting letter
Data segment in number carries out data merging；Data transmission blocks, for described in after data merge
Transmission signal carries out data is activation.
With reference to second possible implementation of second aspect or second aspect, second aspect the third
In possible implementation, the data segmentation module specifically for：Respectively at least two subband
The head addition of signal T-1 0, wherein T is that at least two subband signal distinguishes corresponding frequency domain
The length of the shock response of wave filter；Respectively by addition after at least two subband signal be divided into it is multiple
Length is the data segment of L+T-1, and wherein L is have T-1 between positive integer, and adjacent two data section
Individual overlapped data；Wherein, the corresponding T of any two subband signal at least two subband signal
The ratio of ratio and L+T-1 is equal, and is equal to the ratio of the data rate of any two subband signal.
With reference to second aspect or second aspect the first to the third arbitrary possible implementation,
Two aspect the 4th kind of possible implementations in, the Fourier transformation module specifically for：Basis respectively
Data segment, length L+T-1 of at least two subband signal determines points P of Fourier transformation, wherein
P=L+T-1；Carry out P point Fourier transformations to each data segment of at least two subband signal respectively.
With reference to second aspect or second aspect the first to the 4th kind of arbitrary possible implementation,
Two aspect the 5th kind of possible implementations in, the first inverse Fourier transform unit specifically for：It is right
The corresponding frequency-region signal of the data to be sent carries out the first inverse Fourier transform of M points, wherein the M
Between the points P of Fourier transformation corresponding with arbitrary subband signal at least two subband signal
Ratio, equal to the ratio between the data rate of the transmission signal and the data rate of arbitrary subband signal
Value.
With reference to second aspect or second aspect the first to the 5th kind of arbitrary possible implementation,
Two aspect the 6th kind of possible implementations in, the data combiners block specifically for：According to it is described extremely
The value and formula of the corresponding P and T of arbitrary subband signal in few two subband signalsIt is determined that
The front K data of each data segment in the transmission signal；Reject each data segment in the transmission signal
Front K data；By the remaining data sequential concatenation of each data segment in the transmission signal.
With reference to second aspect or second aspect the first to the 6th kind of arbitrary possible implementation,
In two the 7th kind of possible implementations of aspect, the subband signal signal generating unit includes：Sub-band division mould
Block, for the data to be sent to be divided into at least two subband datas；Carrier wave mapping block, uses
In at least two subband data carrying out carrier wave mapping respectively；Second inverse Fourier transform module, uses
In at least two subband data after carrier wave maps carrying out the second inverse Fourier transform respectively,
Wherein, at least two subband data corresponding second inverse Fourier transform of arbitrary subband data point
Several data rates according to the corresponding subband signal of the arbitrary subband data determine；Plus cyclic prefix module,
For at least two subband data after the second inverse Fourier transform adding Cyclic Prefix respectively,
Generate corresponding subband signal.
With reference to second aspect or second aspect the first to the 7th kind of arbitrary possible implementation,
In two the 8th kind of possible implementations of aspect, arbitrary subband signal at least two subband signal
Data rate determines according to the bandwidth of the subband signal.
With reference to second aspect or second aspect the first to the 8th kind of arbitrary possible implementation,
In two the 9th kind of possible implementations of aspect, the frequency domain map unit, specifically for：By described in extremely
The effective band of few two subband signals is mapped in successively on different frequencies according to frequency spectrum mapping ruler.
With reference to second aspect or second aspect the first to the 9th kind of arbitrary possible implementation,
In two the tenth kind of possible implementations of aspect, the frequency spectrum mapping ruler is two neighboring subband signal
Protection interval is reserved between effective band.
A kind of third aspect, there is provided emitter, including：Transmitter, memory, and with the storage
The processor of device coupling；The memory storage software program；The processor is by the operation software
Program for：
At least two subband signals are generated, at least two subband signal includes data to be sent；
Respectively frequency domain filtering is carried out at least two subband signal, obtain at least two subbands letter
Number corresponding frequency-region signal；
Respectively frequency domain mapping is carried out to the corresponding frequency-region signal of at least two subband signal, obtain described
The corresponding frequency-region signal of data to be sent；
First inverse Fourier transform is carried out to the corresponding frequency-region signal of the data to be sent, transmitting letter is obtained
Number；
The transmitter is used to send the transmission signal.
It is described in the third aspect in the first possible implementation with reference to the implementation of the third aspect
Processor specifically for：Respectively each subband signal at least two subband signal is divided into many numbers
According to section；Respectively Fourier's change is carried out to the data segment of each subband signal at least two subband signal
Change, wherein, the corresponding Fourier transformation of any two subband signal at least two subband signal
Ratio between points is equal to the ratio between the data rate of any two subband signal；Respectively to Jing
The data segment of each subband signal carries out frequency domain at least two subband signal crossed after Fourier transformation
Filtering.
With reference to the third aspect or the third aspect the first possible implementation, in second of the third aspect
In possible implementation, the transmitter specifically for：Data segment in the transmission signal is carried out
Data merge；Data is activation is carried out to the transmission signal after data merge.
With reference to second possible implementation of the third aspect or the third aspect, the third aspect the third
In possible implementation, the process implement body is additionally operable to：Respectively at least two subband signal
Head addition T-1 0, wherein T is that at least two subband signal distinguishes corresponding wave filter
Shock response length；Respectively by addition after at least two subband signal be divided into multiple length for L+T-1
Data segment, wherein L be between positive integer, and adjacent two data section have T-1 overlapped data；
Wherein, at least two subband signal corresponding T-1 of any two subband signal ratio and L+T-1
Ratio it is equal, and be equal to the ratio of the data rate of any two subband signal.
With reference to the third aspect or the third aspect the first to the third arbitrary possible implementation,
In three the 4th kind of possible implementations of aspect, the process implement body is additionally operable to：Respectively according to extremely
Data segment, length L+T-1 of few two subband signals determines points P of Fourier transformation, wherein
P=L+T-1；Carry out P point Fourier transformations to each data segment of at least two subband signal respectively.
With reference to the third aspect or the third aspect the first to the 4th kind of arbitrary possible implementation,
Three aspect the 5th kind of possible implementations in, the processor specifically for：To the data to be sent
Corresponding frequency-region signal carries out the first inverse Fourier transform of M points, wherein the M and described at least two
Ratio in individual subband signal between the points P of the corresponding Fourier transformation of arbitrary subband signal, equal to institute
State the ratio between the data rate of transmission signal and the data rate of arbitrary subband signal.
With reference to the third aspect or the third aspect the first to the 5th kind of arbitrary possible implementation,
In three the 6th kind of possible implementations of aspect, the transmission implement body is additionally operable to：According to described at least two
The value and formula of the corresponding P and T of arbitrary subband signal in individual subband signalIt is determined that described
The front K data of each data segment in transmission signal；Reject in the transmission signal before each data segment
K data；By the remaining data sequential concatenation of each data segment in the transmission signal.
With reference to the third aspect or the third aspect the first to the 6th kind of arbitrary possible implementation,
Three aspect the 7th kind of possible implementations in, the processor specifically for：By the data to be sent
It is divided at least two subband datas；Respectively carrier wave mapping is carried out at least two subband data；
Respectively the second inverse Fourier transform is carried out at least two subband data after carrier wave maps, its
In, the points of corresponding second inverse Fourier transform of arbitrary subband data at least two subband data
Determined according to the data rate of the corresponding subband signal of the subband data；Respectively to inverse through the second Fourier
At least two subband data after conversion adds Cyclic Prefix, generates corresponding subband signal.
With reference to the third aspect or the third aspect the first to the 7th kind of arbitrary possible implementation,
In three the 8th kind of possible implementations of aspect, arbitrary subband signal at least two subband signal
Data rate determines according to the bandwidth of the subband signal.
With reference to the third aspect or the third aspect the first to the 8th kind of arbitrary possible implementation,
Three aspect the 9th kind of possible implementations in, the processor specifically for：It is sub by described at least two
The effective band of band signal is mapped in successively on different frequencies according to frequency spectrum mapping ruler.
With reference to the third aspect or the third aspect the first to the 9th kind of arbitrary possible implementation,
In three the tenth kind of possible implementations of aspect, the frequency spectrum mapping ruler is two neighboring subband signal
Protection interval is reserved between effective band.
The method and apparatus for sending data provided in an embodiment of the present invention, by respectively to each subband signal
After carrying out frequency domain filtering and frequency domain mapping, then carry out inverse Fourier transform and come to the data of each subband signal speed
Rate is unified, and makes the filtering of each subband signal and can carry out under relatively low sample rate, relative to correlation
Time-domain filtering in technology, and the filtering of each subband is required for operating compared with high sampling rate, effectively drop
The low complexity of F-OFDM emitters.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Apply the accompanying drawing to be used needed for example or description of the prior art to be briefly described, it should be apparent that, below
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
Without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is F-OFDM transmitter architecture schematic diagrames in correlation technique；
Fig. 2 is a kind of flow chart of method for sending data provided in an embodiment of the present invention；
Fig. 3 is the flow chart of another kind of method for sending data provided in an embodiment of the present invention；
Fig. 4 is the data sectional schematic diagram of a subband signal；
Fig. 5 is signal amplitude schematic diagram of the subband signal Jing after FFT；
Fig. 6 is signal amplitude schematic diagram of the subband signal Jing after frequency domain filtering；
Fig. 7 is the restructuring schematic diagram of transmission signal；
Fig. 8 is a kind of frequency domain mapping schematic diagram of subband signal；
Fig. 9 is the frequency domain mapping schematic diagram of another kind of subband signal；
Figure 10 is a kind of schematic diagram of device for sending data provided in an embodiment of the present invention；
Figure 11 is a kind of structural representation of subband signal signal generating unit 101；
Figure 12 is the schematic diagram of another kind of device for sending data provided in an embodiment of the present invention；
Figure 13 is a kind of schematic diagram of emitter provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, belong to the scope of protection of the invention.
Term " first ", " second " in following embodiments of the present invention etc. is similar for distinguishing
Object, without being used to describe specific order or precedence.It should be appreciated that the data for so using exist
Can exchange in the case of appropriate, so that the embodiments described herein can be with except illustrating here or describing
Content beyond order implement.
Waveform is the most basic technology of radio communication physical layer, and OFDM is high with its efficiency of transmission, realizes letter
It is single, it is easy to combine etc. with multiple-input and multiple-output (Multiple Input Multiple Output, abbreviation MIMO)
Plurality of advantages, has been widely used at present the long evolving system (the in forth generation mobile communication technology
4th Generation mobile communication technology Long Term Evolution, abbreviation 4G
LTE), and in the wireless communication system such as Wireless Fidelity (Wireless-Fidelity, abbreviation Wi-Fi).
But traditional ofdm system has band, and outward leakage is high, synchronous requirement is strict, and whole bandwidth is only propped up
The shortcomings of holding a kind of waveform parameter.5th third-generation mobile communication technology (the 5th Generation mobile
Communication technology, abbreviation 5G) basic waveform require can support abundant business scenario,
Every kind of business scenario is different to the demand of waveform parameter, can be dynamically selected according to business scenario
With configuration waveform parameter, while and the advantage of traditional OFDM can be taken into account.F-OFDM is exactly to disclosure satisfy that
The waveform technology of 5G demands, Fig. 1 is F-OFDM transmitter architecture schematic diagrames in correlation technique, such as Fig. 1
It is shown, system bandwidth is divided into some subbands：Subband data 1, subband data 2 ... ..., subband data
N, only exists extremely low protection band expense between subband, matched somebody with somebody according to practical business scene demand per seed belt
Put different waveform parameters.Each subband independently carries out subcarrier maps, IFFT conversion, adds Cyclic Prefix
And filtering operation, so as to realize the solution lotus root of each subband waveform, support 5G by the dynamic soft of business demand
Eat dishes without rice or wine parameter configuration.
The method for sending data provided in an embodiment of the present invention specifically goes for base station (evolution
Node B, abbreviation eNB) to UE downlink data transfer, it is also possible to suitable for UE to eNB
Up-link data transfer.The executive agent of the method can be the emitter of eNB sides, it is also possible to
It is the emitter of UE sides.
Fig. 2 is a kind of flow chart of method for sending data provided in an embodiment of the present invention, as shown in Fig. 2
The method of the transmission data that the present embodiment is provided is comprised the following steps：
S21, generates at least two subband signals, and at least two subband signal includes data to be sent；
At least two subband signals are carried out frequency domain filtering by S22 respectively, obtain at least two subband signals pair
The frequency-region signal answered；
S23, carries out frequency domain mapping to the corresponding frequency-region signal of at least two subband signals respectively, obtains pending
Send data corresponding frequency-region signal；
S24, to the corresponding frequency-region signal of data to be sent inverse Fourier transform is carried out, and obtains transmission signal；
S25, sends transmission signal.
In the present embodiment, subband signal refers to the ofdm signal on subband, but is also not excluded for other classes
The signal of type, such as single-carrier signal, filter bank multi-carrier (Filter Bank Multiple Carrier,
Abbreviation FBMC) signal.For clearer description technical scheme, the present embodiment will be with son
Band signal is to do exemplary illustration as a example by ofdm signal.Obviously, the embodiment be for illustrating, and and
It is non-for limiting the present invention.
Exemplary, at least two subband signals can be generated according to correlation technique.As a kind of optional
Embodiment, can generate at least two subbands letter according to the ofdm signal generating process of a standard
Number.Specifically, S21 may comprise steps of：
Institute's data to be sent are divided at least two subband datas by step 1；
At least two subband datas are carried out carrier wave mapping by step 2 respectively；
At least two subband datas after carrier wave maps are carried out inverse Fourier transform by step 3 respectively；
At least two subband datas after inverse Fourier transform are added respectively CP by step 4, and it is right to generate
The subband signal answered.
Wherein, the effect of subcarrier maps is that data to be sent are mapped on effective subcarrier.For example：
Total sub-carrier number is 128, and effectively subcarrier is 100, then will have 100 data to be sent to reflect
Penetrate on specific 100 subcarriers.Inverse Fourier transform and plus CP operations and OFDM in correlation technique
Signal processing method is consistent, it is, inverse Fourier transform here can select IFFT.But it is worth one
It is mentioned that, in the present embodiment, in subband signal generating process, each subband can be carried out compared with small point
IFFT.For the ease of description, below the IFFT carried out in subband signal generating process is referred to as into second
IFFT。
It is understood that the total bandwidth of the subband signal for generating is the corresponding frequency spectrum of total sub-carrier number, its
In effectively subcarrier is corresponding is effective bandwidth, and remaining is with outer composition.It is each in order to suppress and prevent
The interference of intersubband, in the present embodiment, carries out frequency domain filtering to each subband signal respectively, and frequency domain is filtered
The corresponding frequency-region signal of each subband signal carries out frequency domain mapping after ripple, obtains the corresponding frequency domain of data to be sent
Signal, then inverse Fourier transform is carried out to the corresponding frequency-region signal of data to be sent, in order to improve at data
Reason speed, inverse Fourier transform here can also for example select IFFT.Below will be right for the ease of description
The IFFT that the corresponding frequency-region signal of data to be sent is carried out is referred to as an IFFT.On the one hand, can pass through
Frequency-region signal is become back to the time domain by the first IFFT；On the other hand, each subband can be believed by an IFFT
Number data rate unified.
It is noted that each subband signal is low-rate data, so-called low rate is relative to final
For the two-forty transmission signal of generation.For example, final output data rate is 30.72MHz, and
The signal rate of each subband can be less than 30.72MHz.
Exemplary, the data rate of subband signal can be according to the bandwidth demand of the subband and subcarrier
The parameters such as interval are determining.Illustrate, it is assumed that the subcarrier spacing of subband 1 is 15KHz, it is carried
Be little Packet type business, and the quantity of user is few, therefore the bandwidth demand of the subband is less,
Hypothesis bandwidth demand is 100 subcarrier widths, then data rate is 100 × 15KHz=1.5MHz.Class
As, the data rate of other subband signals can also determine by this method, it is assumed that the son of subband 2
At intervals of 15KHz, bandwidth demand is 600 subcarriers to carrier wave, then data rate be 600 ×
15KHz=9MHz.
Under normal circumstances, for the ease of carrying out an IFFT and the 2nd IFFT, the son of each subband signal is carried
The number of ripple needs the integral number power for 2.In the present embodiment, by taking subband 1 as an example, relatively rational son
The number of carrier wave should be 128, i.e., more than 100, and the minimum of a value of the integral number power for 2.Now, subband
1 total number of subcarriers is 128, and effective number of subcarriers is 100, then the data of subband 1
Speed is ultimately determined to 1.92MHz, i.e. 128 × 15KHz=1.92MHz.It is similar, subband 2 it is total
Number of subcarriers is 1024, and effective number of subcarriers is 600, then the data rate of subband 2 is most
It is defined as 15.36MHz, i.e. 1024 × 15KHz=15.36MHz eventually.
In addition, as described above, in the present embodiment, in subband signal generating process, each subband can be with
Carry out the IFFT compared with small point.Specifically, carrying out the second IFFT point number to each subband signal can basis
The data rate of corresponding subband determines.
Due to, the present embodiment is unified by an IFFT to the data rate of each subband signal, then and
The points M of one IFFT can according to total number of subcarriers of one of subband signal, data rate and
The data rate of final transmission signal determines.Total number of subcarriers of such as subband 1 is 128, subband 1
Data rate be 1.92MHz, the data rate of final transmission signal is 30.72MHz, then first
The points of IFFT are 128 × (30.72/1.92)=2048 point.Similar, according to total subcarrier of subband 2
The data rate calculation of quantity, data rate and final transmission signal will obtain identical result, i.e., 1024
× (30.72/15.36)=2048 point.
The method of the transmission data that the present embodiment is provided, for each subband signal, its subcarrier spacing,
Subband width, CP length can be self-adaptative adjustment, to adapt to the channel scenario and industry of different UE
Service type, by carrying out to each subband signal frequency domain filtering and frequency domain mapping respectively after, then carry out first
IFFT allows the filtering of each subband signal relatively low unifying to the data rate of each subband signal
Sample rate under carry out, relative to each subband in correlation technique filtering be required for compared with high sampling rate grasp
Make, can effectively reduce complexity.
In addition, in the present embodiment, by carrying out frequency domain filtering to each subband signal, relative to related skill
Time-domain filtering in art, it is also possible to effectively reduce complexity.And, in subband signal generating process,
Each subband can adopt the 2nd IFFT compared with small point, can also further reduce complexity.
Fig. 3 is the flow chart of another kind of method for sending data provided in an embodiment of the present invention, the present embodiment
On the basis of embodiment illustrated in fig. 2, S22 specifically may comprise steps of：
S221, will be divided into multiple data segments by each subband signal at least two subband signals respectively；
S222, carries out Fourier's change to the data segment of each subband signal at least two subband signals respectively
Change；
S223, respectively to each subband signal at least two subband signals after Fourier transformation
Data segment carries out frequency domain filtering.
Further, S25 specifically may comprise steps of：
S251, to the data segment in transmission signal data merging is carried out；
S252, to the transmission signal after data merge data is activation is carried out.
Filtering operation is generally realized in time domain by linear convolution, it is assumed that filter impulse response is h (n),
Length is T, then the filtering operation of signal x (n) can be expressed as：Wherein
Y (n) is filtered output signal.
The total length for assuming data is N, then total complex multiplication calculation times are about NT.
In F-OFDM systems, in order to control intersubband interference, shock response length T of wave filter would generally be compared with
Greatly, computation complexity is very high.In order to reduce complexity, the embodiment of the present invention adopts the frequency of low complex degree
The filtering of subband signal is realized in domain filtering.
It is understood that finite impulse response (FIR) (Finite Impulse Response, abbreviation FIR) filtering
Device is compared with IIR (Infinite Impulse Response, abbreviation IIR) wave filter, and it has
Linear phase place, the advantage of easily design, in addition FIR filter can adopt Fast Fourier Transform (FFT) (Fast
Fourier Transform, abbreviation FFT) algorithm, under conditions of identical exponent number, arithmetic speed can be fast
Much.And subband signal is continuous, therefore the purpose of data sectional is exactly that these continuous datas are divided into
Facilitate the data block for meeting certain length condition of signal transacting, be that the realization of frequency domain filtering is prepared.
In the present embodiment, the processing method of all subbands is identical, and difference is in the selection of design parameter,
To be described in further details by taking a subband as an example below.
Fig. 4 is the data sectional schematic diagram of a subband signal, as shown in figure 4, first in the subband signal
Head addition T-1 0, wherein T is the shock response length of the corresponding wave filter of the subband signal,
Assume that filter impulse response is h (n), 1≤n≤T.Then data are segmented, per section of length is
L+T-1, L are have T-1 data to be to overlap in any positive integer, and continuous two segment data.Score section
The i-th segment data afterwards is xi(n),1≤n≤L+T-1。
It is noted that if data are finite lengths, the length of last segmentation may be not enough
L+T-1, can gather enough L+T-1 by adding 0 in afterbody.The selection of L is a problem of implementation.Preferably,
The selection of L should make the integral number power that L+T-1 is 2, i.e. L+T-1=2N, conveniently carry out FFT.
The present embodiment is not limited the concrete length of T and L, but the two length should meet different sons
The ratio of the T-1 of band and the ratio of L+T-1 are equal, and equal to the data rate between different sub-band
Ratio.For example：It is 128 that the size for assuming the T-1 of subband 1 is 64, L+T-1 sizes；Due to subband 1
It is 1.92/15.56=1/8 with the ratio of the data rate of subband 2；Therefore, the size of the T-1 of subband 2 should
Select as 512 (i.e. 64 × 8), L+T-1 sizes should be 1024 (i.e. 128 × 8).
Data segment to the subband signal after segmentation, i.e. xiN (), 1≤n≤L+T-1 carries out FFT, carry out
The purpose of FFT is also to prepare for the realization of frequency domain filtering.Fig. 5 is letter of the subband signal Jing after FFT
Number amplitude schematic diagram, as shown in figure 5, we call the data sampling with obvious range value having
Effect bandwidth, and the relatively low data sampling of the range value of effective bandwidth both sides is referred to as with outer composition, all of number
It is called total bandwidth according to sampling, it is clear that the width of total bandwidth determines by total sub-carrier number of the subband, effectively
The position of bandwidth and width are determined by effective subcarrier of the subband.Illustrate, due to having for subband 1
Effect sub-carrier number is 100, and total sub-carrier number is 128, it is assumed that after carrying out 128 points of FFT, son
It is made up of 128 frequency samplings with 1 total bandwidth, then 100 frequencies centered on its effective bandwidth
Rate is sampled.In the same manner, it is assumed that subband 2 after 1024 points of FFT, by 1024 frequencies adopted by total bandwidth
Sample is constituted, 600 centered on its effective bandwidth frequency sampling.
As a kind of preferably embodiment, can be according to the data segment of the subband signal of each after segmentation
Length determines points P of FFT, such as P=L+T-1.In theory, the data segment of each subband signal is carried out
Ratio between the points M of the points P and an IFFT of FFT, it should equal to the data of transmission signal
Ratio between the data rate of speed and each subband signal, makes the subband signal with different pieces of information speed
The data rate with unified data rate, i.e. transmission signal after an IFFT.Further can be with
It is understood by, according to the data rate of arbitrary subband and its data rate of the points of FFT and transmission signal
It is determined that the points of an IFFT be identical.Illustrate, the points of the FFT of subband 1 are 128,
The data rate of subband 1 is 1.92MHz, then the first IFFT point number M should be 128 ×
(30.72/1.92)=2048 point.In the same manner, the points of the FFT of subband 2 are 1024, the data speed of subband 2
Rate is 15.36MHz, then the first IFFT point number M should be 1024 × (30.72/15.36)=2048 point.
Further, frequency domain filtering is carried out to the data segment of the subband signal after FFT.Specifically,
Data after FFT are multiplied with the frequency domain response of wave filter, the frequency domain response of its median filter can be by
FFTL+T-1{ h (n) } is obtained, and h (n) is responded for the time domain impulse of wave filter, and its length is T,
FFTL+T-1{ h (n) } represents the FFT that L+T-1 points are carried out to h (n).Fig. 6 is a subband signal Jing after frequency domain filtering
Signal amplitude schematic diagram, compare with the signal amplitude before the filtering shown in Fig. 5, the amplitude of band outer portion
Substantially reduce.
It is understood that to xiN (), 1≤n≤L+T-1 carries out the FFT of L+T-1 points, and and wave filter
Frequency domain response be multiplied, then back to the time domain is become by an IFFT, the signal for obtaining can be expressed as：
yi(n)=IFFTM{FFTL+T-1{xi(n)}FFTL+T-1{ h (n) } }, the frequency domain response of its median filter
FFTL+T-1{ h (n) } is constant in a filtering operation, only need to be calculated once, or calculates in advance and deposit
Store up.
Fig. 7 is the restructuring schematic diagram of transmission signal, refer to shown in Fig. 7.Because frequency domain multiplication is equivalent to
Time domain cyclic convolution, therefore by yi(n)=IFFTM{FFTL+T-1{xi(n)}FFTL+T-1{ h (n) } } it is calculated
yiN () is the equal of xiThe time domain cyclic convolution results of (n) and h (n).However, can by the characteristic of cyclic convolution
Know, yiX is contained in the front K data of (n)iThe composition of the rear T-1 data of (n), wherein
Therefore yiN the front K data of () belong to the result of cyclic convolution, remainder is then equivalent linear convolution
As a result.
It is noted that as described above, in the present embodiment, the corresponding T-1 of any two subband signal
Ratio and P ratio it is equal, therefore parameter P and T for determining K can be arbitrary subband signal pair
The points of the FFT for answering and the shock response length of wave filter.
As a kind of preferably embodiment, can be by all data segment yiN the front K data of () are rejected,
And spliced the remaining data of data segment according to sequencing, finally give equivalent linear convolution
As a result.Clearly as the ratio of the ratio of the corresponding T-1 of any two subband signal and P is equal, because
The data length to be rejected is identical in each data segment in this final transmission signal.
As mentioned above the concrete length of T and L should meet the ratio and L+T-1 of the T-1 of different sub-band
Ratio it is equal, and equal to the ratio of the data rate between different sub-band.And it is noted that L
The several times of T-1 should be exceeded, due to y after filteringiThere are K data to be dropped in (n), if L chooses
It is too small, the large percentage of invalid computation will be caused.
In the present embodiment, if ignoring the frequency domain response FFT for calculating wave filterL+T-1Complexity needed for { h (n) }
Degree.Complex multiplication number of times to length for needed for the data of N carry out frequency domain filtering is aboutWith the ratio of multiplicative complexity NT needed for time-domain filtering
Example is aboutFor example, T=512 is worked as, during L=513,
The multiplication number of times of frequency domain filtering is about 0.08 times of time-domain filtering.As can be seen here, the number that the present embodiment is provided
Complexity can be effectively reduced according to the method for sending.
In a kind of possible implementation of the present embodiment, to the corresponding frequency domain of at least two subband signals
Signal carries out (S23) when frequency spectrum maps, can be by the effective band of at least two subband signals according to frequency spectrum
Mapping ruler is mapped on different frequencies.
Signal of each subband signal after frequency domain filtering is mapped on different frequencies.Wherein, each
The effective bandwidth of subband signal is mapped in respectively different frequency positions according to the frequency spectrum mapping ruler of predefined
Put, and the spectrum overlapping of and other subbands then all or part of with outer composition.
Exemplary, it is assumed that the points of an IFFT are 2048, it can be seen from the property of IFFT, input
2048 data samplings of IFFT just represent respectively equally spaced 2048 different frequency locations.Example
Such as, the signal of the subband 1 after frequency domain filtering has 128 data samplings, and wherein effective bandwidth is 100
Individual data sampling, the signal of the subband 2 after frequency domain filtering has 1024 data samplings, wherein effective band
A width of 600 data samplings.
Fig. 8 is a kind of frequency domain mapping schematic diagram of subband signal, as shown in figure 8, frequency spectrum mapping now
Rule is the not reserved protection interval between adjacent sub-bands.For example, 100 of the effective bandwidth of subband 1
Data sampling has been mapped in numbering Z to the frequency location of numbering Z+99, and effective band of subband 2
600 wide data samplings have been mapped on the frequency location of numbering Z+100 to Z+699, wherein Z
Represent the numbering of the initial frequency location of subband 1.And the sampling of their outer composition of band then with it is other
Subband overlaps each other, and in signal transacting, is directly added overlapped multiple samplings.
Fig. 9 is the frequency domain mapping schematic diagram of another kind of subband signal, as shown in figure 9, frequency spectrum now reflects
It is that protection interval is reserved between the effective band of adjacent sub-bands to penetrate rule.It is with the difference of Fig. 8,
There is the vacant frequency location of Δ between the effective band of adjacent sub-bands as protection interval.It is appreciated that
, when there is protection interval between the effective band of adjacent sub-bands, each intersubband can be effectively reduced
Interference.
The method of the data is activation provided based on the above embodiment of the present invention, by respectively to each subband
Signal is carried out after frequency domain filtering and frequency domain mapping, then is carried out the first Fourier transformation and come to each subband signal
Data rate is unified, and makes the filtering of each subband signal and can carry out under relatively low sample rate, relatively
The filtering of each subband in correlation technique is required for being operated compared with high sampling rate, can effectively reduce complexity
Degree.By carrying out frequency domain filtering to each subband signal, relative to the time-domain filtering in correlation technique, can be with
Effectively reduce the computation complexity of algorithm.Mapped by frequency domain, and between the effective band of adjacent sub-bands
Reserved protection interval, can effectively reduce the interference of each intersubband.
Figure 10 is a kind of schematic diagram of device for sending data provided in an embodiment of the present invention, and the device is concrete
Can arrange in a base station, it is also possible to arrange in a user device, can be used for realizing Fig. 2 of the present invention or
The method of the transmission data that embodiment illustrated in fig. 3 is provided, here is omitted.As shown in Figure 10, the number
Include subband signal signal generating unit 101, frequency domain filtering unit 102, frequency domain map unit according to dispensing device
103, inverse Fourier transform unit 104 and transmitting element 105.
Wherein, subband signal signal generating unit 101 can be used for generating at least two subband signals, and this is at least
Two subband signals include data to be sent.Frequency domain filtering unit 102 can be used for respectively at least two
Subband signal carries out frequency domain filtering, obtains the corresponding frequency-region signal of at least two subband signals.Frequency domain maps
Unit 103 can be used for carrying out frequency domain mapping to the corresponding frequency-region signal of at least two subband signals respectively,
Obtain the corresponding frequency-region signal of data to be sent.Inverse Fourier transform unit 104 can be used for to be sent
The corresponding frequency-region signal of data carries out the first inverse Fourier transform, obtains transmission signal.Transmitting element 105
Can be used for sending transmission signal.
In actual applications, subband signal signal generating unit 101 can be for generating in correlation technique
The device of ofdm signal, Figure 11 is a kind of structural representation of subband signal signal generating unit 101, is such as schemed
Shown in 11, the subband signal signal generating unit include sub-band division module 111, carrier wave mapping block 1121,
1122nd ..., 112N, IFFT module 1131,1132 ..., 113N and add CP modules 1141,
1142、……、114N。
Wherein, sub-band division module 111 can be used for for data to be sent being divided at least two subbands
Data.Carrier wave mapping block 1121,1122 ..., 112N can be used for respectively to each subband data
Carry out carrier wave mapping.IFFT modules 1131,1132 ..., 113N can be used for respectively to through load
Each subband data after ripple mapping carries out the second inverse Fourier transform, wherein, at least two subband datas
The points of corresponding second inverse Fourier transform of arbitrary subband data determine according to the data rate of the subband.
Plus CP modules 1141,1142 ..., 114N can be used for respectively to through the second inverse Fourier transform
Each subband data afterwards adds CP, generates corresponding subband signal.
It is noted that in the present embodiment, the data rate of each subband signal can be believed according to subband
Number corresponding bandwidth determines.
In actual applications, frequency domain map unit 103 specifically can be used for effective frequency of each subband signal
Band is mapped in successively on different frequencies according to frequency spectrum mapping ruler.
Used as a kind of preferably embodiment, frequency spectrum mapping ruler here can be in two neighboring subband
Protection interval is reserved between the effective band of signal, to reduce the interference of each intersubband.
The device of the transmission data that the present embodiment is provided, can be used for realizing shown in Fig. 2 of the present invention or Fig. 4
The method of the transmission data that embodiment is provided, it realizes that principle is similar with technique effect, and here is omitted.
Figure 12 is the schematic diagram of another kind of device for sending data provided in an embodiment of the present invention, the present embodiment
On the basis of 10 illustrated embodiments of way, frequency domain filtering unit 102 can specifically include data segmentation module
10211st, 10212 ..., 1021N, Fourier transformation module (FFT module) 10221,10222 ...,
1022N and filtration module 10231,10232 ..., 1023N.Wherein, data segmentation module 10211,
10212nd ..., 1021N can be used for respectively each subband signal being divided into multiple data segments.FFT module
10221st, 10222 ..., 1022N can be used for respectively carrying out in Fu the data segment of each subband signal
Leaf transformation, wherein, the corresponding Fourier transformation of any two subband signal at least two subband signals
Ratio between points is equal to the ratio between the data rate of any two subband signal.Filtration module
10231st, 10232 ..., 1023N can be used for respectively believing each subband after Fourier transformation
Number data segment carry out frequency domain filtering.
Further, transmitting element 105 can specifically include data combiners block 1051 and data is activation mould
Block 1052.Wherein, data combiners block 1051 can be used for entering line number to the data segment in transmission signal
According to merging；Data transmission blocks 1052 can be used for carrying out data to the transmission signal after data merge
Send.
In actual applications, data segmentation module 10211,10212 ..., 1021N specifically can use
In：In the head addition T-1 individual 0 of corresponding subband signal, wherein T is corresponding subband signal correspondence
Wave filter shock response length；The subband signal after addition is divided into multiple length for L+T-1
Data segment, wherein L be between positive integer, and adjacent two data section have T-1 overlapped data；
It is noted that the ratio phase of the ratio of the corresponding T-1 of any two subband signal and L+T-1
Deng, and it is equal to the ratio of the data rate of any two subband signal.
Further, FFT module 10221,10222 ..., 1022N specifically can be used for：According to
Data segment, length L+T-1 of corresponding subband signal determines points P of Fourier transformation, wherein
P=L+T-1, and each data segment to the subband signal carries out P point Fourier transformations.
Further, in actual applications, inverse Fourier transform unit 104 specifically can be used for：Treat
Sending the corresponding frequency-region signal of data carries out the first inverse Fourier transform of M points.Wherein, M and above-mentioned son
Ratio in band signal between the points P of the corresponding Fourier transformation of arbitrary subband signal, equal to transmitting letter
Number data rate and the data rate of the subband signal between ratio.
Further, in actual applications, data combiners block 1051 specifically can be used for：According at least
The value and formula of the corresponding P and T of arbitrary subband signal in two subband signalsIt is determined that sending out
Penetrate the front K data of each data segment in signal；Reject the front K numbers of each data segment in transmission signal
According to, and by the remaining data sequential concatenation of each data segment in transmission signal.
The device of the transmission data that the present embodiment is provided, can be used for realizing shown in Fig. 2 of the present invention or Fig. 4
The method of the transmission data that embodiment is provided, it realizes that principle is similar with technique effect, and here is omitted.
Figure 13 is a kind of schematic diagram of emitter provided in an embodiment of the present invention, and the emitter specifically can set
Put in a base station, can be used for realizing the transmission data that Fig. 2 of the present invention or embodiment illustrated in fig. 3 are provided
Method, here is omitted.As shown in figure 12, the emitter that the present embodiment is provided includes transmitter 131,
Memory 132 and processor 133, wherein processor 133 are coupled to memory 132.
Specifically, the storage of memory 132 software program, processor 133 can pass through run memory 132
In software program for：At least two subband signals are generated, at least two subband signal includes
Data to be sent；Respectively frequency domain filtering is carried out at least two subband signal, obtain described at least two
The corresponding frequency-region signal of individual subband signal；Respectively to the corresponding frequency-region signal of at least two subband signal
Frequency domain mapping is carried out, the corresponding frequency-region signal of the data to be sent is obtained；To the data pair to be sent
The frequency-region signal answered carries out the first inverse Fourier transform, obtains transmission signal.Transmitter 131 can be used for
Send transmission signal.
In actual applications, processor 133 specifically can be used for：Respectively will be at least two subband signals
Each subband signal is divided into multiple data segments；Respectively to each subband signal at least two subband signals
Data segment carries out Fourier transformation；Respectively to every at least two subband signals after Fourier transformation
The data segment of individual subband signal carries out frequency domain filtering.
Further, transmitter 131 specifically can be used for：Data are carried out to the data segment in transmission signal
Merge；Data is activation is carried out to the transmission signal after data merge.
It is noted that between the points of the corresponding Fourier transformation of above-mentioned any two subband signal
Ratio is equal to the ratio between the data rate of any two subband signal.
Further, in actual applications, processor 133 specifically can be also used for：For each subband
Signal, in the head addition T-1 individual 0 of the subband signal, wherein T is the corresponding filtering of the subband signal
The shock response length of device；The subband signal after addition is divided into the data segment that multiple length are L+T-1,
Wherein L is have T-1 overlapped data between positive integer, and adjacent two data section；Wherein, at least
The ratio of the corresponding T-1 of any two subband signal and the ratio of L+T-1 are equal in two subband signals,
And it is equal to the ratio of the data rate of any two subband signal.
Further, processor 133 specifically can be also used for：For each subband signal, according to this
Data segment, length L+T-1 of subband signal determines points P of Fourier transformation, wherein P=L+T-1；It is right
Each data segment of the subband signal carries out P point Fourier transformations.
Further, processor 133 specifically can be also used for：To the corresponding frequency domain letter of data to be sent
The first inverse Fourier transform of M points number is carried out, wherein the M is arbitrary with least two subband signals
Ratio between the points P of the corresponding Fourier transformation of subband signal, equal to the data rate of transmission signal
The ratio and data rate of the subband signal between.
Accordingly, transmitter 131 specifically can be also used for：According to arbitrary son at least two subband signals
The value and formula of band signal corresponding P and TDetermine each data segment in transmission signal
Front K data；Reject the front K data of each data segment in transmission signal；By in transmission signal each
The remaining data sequential concatenation of data segment.
In actual applications, processor 133 is specifically additionally operable to：Data to be sent are divided into at least two
Individual subband data；Respectively carrier wave mapping is carried out at least two subband datas；Respectively to mapping through carrier wave
At least two subband datas afterwards carry out the second inverse Fourier transform, wherein, at least two subband datas
The points of corresponding second inverse Fourier transform of arbitrary subband data determine according to the data rate of the subband；
Respectively at least two subband datas after the second inverse Fourier transform are added with CP, corresponding subband is generated
Signal.
Used as a kind of preferably embodiment, in the present embodiment, the data rate of each subband signal can be with
Determined according to the bandwidth of the subband.
In actual applications, processor 133 is specifically additionally operable to：By the effective band of each subband signal according to
Frequency spectrum mapping ruler is mapped in successively on different frequencies.
Used as a kind of preferably embodiment, frequency spectrum mapping ruler here can be in two neighboring subband
Protection interval is reserved between the effective band of signal, to reduce the interference of each intersubband.
The emitter that the present embodiment is provided, can be used for realizing that Fig. 2 of the present invention or embodiment illustrated in fig. 4 are carried
For transmission data method, it realizes that principle is similar with technique effect, and here is omitted.
One of ordinary skill in the art will appreciate that：Realize all or part of step of above-mentioned each method embodiment
Suddenly can be completed by the related hardware of programmed instruction.Aforesaid program can be stored in a computer can
In reading storage medium.The program upon execution, performs the step of including above-mentioned each method embodiment；And
Aforesaid storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
Finally it should be noted that：Various embodiments above is only illustrating technical scheme rather than right
Its restriction；Although being described in detail to the present invention with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It still can modify to the technical scheme described in foregoing embodiments,
Either equivalent is carried out to which part or all technical characteristic；And these modifications or replacement, and
The scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution is not made.
Claims (33)
1. it is a kind of send data method, it is characterised in that include：
At least two subband signals are generated, at least two subband signal includes data to be sent；
Respectively frequency domain filtering is carried out at least two subband signal, obtain at least two subbands letter
Number corresponding frequency-region signal；
Respectively frequency domain mapping is carried out to the corresponding frequency-region signal of at least two subband signal, obtain described
The corresponding frequency-region signal of data to be sent；
First inverse Fourier transform is carried out to the corresponding frequency-region signal of the data to be sent, transmitting letter is obtained
Number；
Send the transmission signal.
2. method according to claim 1, it is characterised in that described respectively to described at least two
Subband signal carries out frequency domain filtering, including：
Respectively each subband signal at least two subband signal is divided into multiple data segments；
Respectively Fourier's change is carried out to the data segment of each subband signal at least two subband signal
Change, wherein, the corresponding Fourier transformation of any two subband signal at least two subband signal
Ratio between points is equal to the ratio between the data rate of any two subband signal；
Respectively to the number of each subband signal at least two subband signal after Fourier transformation
Frequency domain filtering is carried out according to section.
3. method according to claim 2, it is characterised in that the transmission transmission signal,
Including：
Data merging is carried out to the data segment in the transmission signal；
Data is activation is carried out to the transmission signal after data merge.
4. according to the method in claim 2 or 3, it is characterised in that described in the general respectively at least
Each subband signal is divided into multiple data segments in two subband signals, including：
Respectively in the head addition T-1 0 of at least two subband signal, wherein T for it is described at least
Two subband signals distinguish the shock response length of corresponding wave filter；
Respectively by addition after at least two subband signal be divided into multiple length be L+T-1 data
Section, wherein L is have T-1 overlapped data between positive integer, and adjacent two data section；
Wherein, at least two subband signal ratio of the corresponding T-1 of any two subband signal and
The ratio of L+T-1 is equal, and is equal to the ratio of the data rate of any two subband signal.
5. method according to claim 4, it is characterised in that described respectively to described at least two
The data segment of each subband signal carries out Fourier transformation in subband signal, including：
Respectively Fourier transformation is determined according to data segment, length L+T-1 of at least two subband signal
Points P, wherein P=L+T-1；
Carry out P point Fourier transformations to each data segment of at least two subband signal respectively.
6. method according to claim 5, it is characterised in that described to the data pair to be sent
The frequency-region signal answered carries out the first inverse Fourier transform, including：
First inverse Fourier transform of M points is carried out to the corresponding frequency-region signal of the data to be sent, wherein
Points P of M Fourier transformations corresponding with arbitrary subband signal at least two subband signal
Between ratio, equal to the data rate of data rate and arbitrary subband signal of the transmission signal
Between ratio.
7. method according to claim 6, it is characterised in that described in the transmission signal
Data segment carries out data merging, including：
According to the value and formula of the corresponding P and T of arbitrary subband signal at least two subband signalDetermine the front K data of each data segment in the transmission signal；
Reject the front K data of each data segment in the transmission signal；
By the remaining data sequential concatenation of each data segment in the transmission signal.
8. the method according to any one of claim 1-7, it is characterised in that the generation at least two
Individual subband signal, including：
The data to be sent are divided into at least two subband datas；
Respectively carrier wave mapping is carried out at least two subband data；
Respectively second Fourier's inversion is carried out at least two subband data after carrier wave maps
Change, wherein, corresponding second inverse Fourier transform of arbitrary subband data at least two subband data
Points determined according to the data rate of the corresponding subband signal of the arbitrary subband data；
Respectively Cyclic Prefix is added at least two subband data after the second inverse Fourier transform,
Generate corresponding subband signal.
9. the method according to any one of claim 2-8, it is characterised in that described at least two is sub
The data rate of arbitrary subband signal determines according to the bandwidth of arbitrary subband signal in band signal.
10. the method according to any one of claim 1-9, it is characterised in that described respectively to institute
Stating the corresponding frequency-region signal of at least two subband signals carries out frequency domain mapping, including：
The effective band of at least two subband signal is mapped in into successively difference according to frequency spectrum mapping ruler
Frequency on.
11. methods according to claim 10, it is characterised in that the frequency spectrum mapping ruler is phase
Protection interval is reserved between the effective band of adjacent two subband signals.
12. a kind of devices for sending data, it is characterised in that include：
Subband signal signal generating unit, for generating at least two subband signals, at least two subbands letter
Number include data to be sent；
Frequency domain filtering unit, at least two subband signal carrying out frequency domain filtering respectively, obtains
The corresponding frequency-region signal of at least two subband signal；
Frequency domain map unit, for carrying out to the corresponding frequency-region signal of at least two subband signal respectively
Frequency domain maps, and obtains the corresponding frequency-region signal of the data to be sent；
Inverse Fourier transform unit, to the corresponding frequency-region signal of the data to be sent the first Fourier is carried out
Inverse transformation, obtains transmission signal；
Transmitting element, for sending the transmission signal.
13. devices according to claim 12, it is characterised in that the frequency domain filtering unit includes：
Data segmentation module, for being respectively divided into each subband signal at least two subband signal
Multiple data segments；
Fourier transformation module, for respectively to each subband signal at least two subband signal
Data segment carries out Fourier transformation, wherein, any two subband signal at least two subband signal
Ratio between the points of corresponding Fourier transformation is equal to the data rate of any two subband signal
Between ratio；
Filtration module, for respectively to every at least two subband signal after Fourier transformation
The data segment of individual subband signal carries out frequency domain filtering.
14. devices according to claim 13, it is characterised in that the transmitting element includes：
Data combiners block, for carrying out data merging to the data segment in the transmission signal；
Data transmission blocks, for carrying out data is activation to the transmission signal after data merge.
15. devices according to claim 13 or 14, it is characterised in that the data sectional mould
Block specifically for：
Respectively in the head addition T-1 0 of at least two subband signal, wherein T for it is described at least
Two subband signals distinguish the length of the shock response of corresponding frequency domain filter；
Respectively by addition after at least two subband signal be divided into multiple length be L+T-1 data
Section, wherein L is have T-1 overlapped data between positive integer, and adjacent two data section；
Wherein, at least two subband signal ratio of the corresponding T-1 of any two subband signal and
The ratio of L+T-1 is equal, and is equal to the ratio of the data rate of any two subband signal.
16. devices according to claim 15, it is characterised in that the Fourier transformation module tool
Body is used for：
Respectively Fourier transformation is determined according to data segment, length L+T-1 of at least two subband signal
Points P, wherein P=L+T-1；
Carry out P point Fourier transformations to each data segment of at least two subband signal respectively.
17. devices according to claim 16, it is characterised in that the inverse Fourier transform unit
Specifically for：
First inverse Fourier transform of M points is carried out to the corresponding frequency-region signal of the data to be sent, wherein
Points P of M Fourier transformations corresponding with arbitrary subband signal at least two subband signal
Between ratio, equal to the data rate of data rate and arbitrary subband signal of the transmission signal
Between ratio.
18. devices according to claim 17, it is characterised in that the data combiners block is concrete
For：
According to the value and formula of the corresponding P and T of arbitrary subband signal at least two subband signalDetermine the front K data of each data segment in the transmission signal；
Reject the front K data of each data segment in the transmission signal；
By the remaining data sequential concatenation of each data segment in the transmission signal.
19. devices according to any one of claim 12-18, it is characterised in that the subband letter
Number signal generating unit includes：
Sub-band division module, for the data to be sent to be divided into at least two subband datas；
Carrier wave mapping block, at least two subband data carrying out carrier wave mapping respectively；
Inverse Fourier transform module, for respectively at least two sub-band number after carrier wave maps
According to carrying out the second inverse Fourier transform, wherein, arbitrary subband data pair at least two subband data
Data of the points of the second inverse Fourier transform answered according to the corresponding subband signal of the arbitrary subband data
Speed determines；
Plus cyclic prefix module, for respectively to described at least two after the second inverse Fourier transform
Subband data adds Cyclic Prefix, generates corresponding subband signal.
20. devices according to any one of claim 13-19, it is characterised in that described at least two
The data rate of arbitrary subband signal determines according to the bandwidth of arbitrary subband signal in individual subband signal.
21. devices according to any one of claim 12-20, it is characterised in that the frequency domain reflects
Unit is penetrated, specifically for：
The effective band of at least two subband signal is mapped in into successively difference according to frequency spectrum mapping ruler
Frequency on.
22. devices according to claim 21, it is characterised in that the frequency spectrum mapping ruler is phase
Protection interval is reserved between the effective band of adjacent two subband signals.
23. a kind of emitters, it is characterised in that include：Transmitter, memory, and deposit with described
The processor of reservoir coupling；
The memory storage software program；
The processor by the operation software program for：
At least two subband signals are generated, at least two subband signal includes data to be sent；
Respectively frequency domain filtering is carried out at least two subband signal, obtain at least two subbands letter
Number corresponding frequency-region signal；
Respectively frequency domain mapping is carried out to the corresponding frequency-region signal of at least two subband signal, obtain described
The corresponding frequency-region signal of data to be sent；
First inverse Fourier transform is carried out to the corresponding frequency-region signal of the data to be sent, transmitting letter is obtained
Number；
The transmitter is used to send the transmission signal.
24. emitters according to claim 23, it is characterised in that the processor specifically for：
Respectively each subband signal at least two subband signal is divided into multiple data segments；
Respectively Fourier's change is carried out to the data segment of each subband signal at least two subband signal
Change, wherein, the corresponding Fourier transformation of any two subband signal at least two subband signal
Ratio between points is equal to the ratio between the data rate of any two subband signal；
Respectively to the number of each subband signal at least two subband signal after Fourier transformation
Frequency domain filtering is carried out according to section.
25. emitters according to claim 24, it is characterised in that the transmitter specifically for：
Data merging is carried out to the data segment in the transmission signal；
Data is activation is carried out to the transmission signal after data merge.
26. emitters according to claim 24 or 25, it is characterised in that the process utensil
Body is additionally operable to：
Respectively in the head addition T-1 0 of at least two subband signal, wherein T for it is described at least
Two subband signals distinguish the shock response length of corresponding wave filter；
Respectively by addition after at least two subband signal be divided into multiple length be L+T-1 data
Section, wherein L is have T-1 overlapped data between positive integer, and adjacent two data section；
Wherein, at least two subband signal ratio of the corresponding T-1 of any two subband signal and
The ratio of L+T-1 is equal, and is equal to the ratio of the data rate of any two subband signal.
27. emitters according to claim 26, it is characterised in that the process implement body is also used
In：
Respectively Fourier transformation is determined according to data segment, length L+T-1 of at least two subband signal
Points P, wherein P=L+T-1；
Carry out P point Fourier transformations to each data segment of at least two subband signal respectively.
28. emitters according to claim 27, it is characterised in that the processor specifically for：
First inverse Fourier transform of M points is carried out to the corresponding frequency-region signal of the data to be sent, wherein
Points P of M Fourier transformations corresponding with arbitrary subband signal at least two subband signal
Between ratio, equal to the data rate of data rate and arbitrary subband signal of the transmission signal
Between ratio.
29. emitters according to claim 28, it is characterised in that the transmission implement body is also used
In：
According to the value and formula of the corresponding P and T of arbitrary subband signal at least two subband signalDetermine the front K data of each data segment in the transmission signal；
Reject the front K data of each data segment in the transmission signal；
By the remaining data sequential concatenation of each data segment in the transmission signal.
30. emitters according to any one of claim 23-29, it is characterised in that the process
Implement body is used for：
The data to be sent are divided into at least two subband datas；
Respectively carrier wave mapping is carried out at least two subband data；
Respectively second Fourier's inversion is carried out at least two subband data after carrier wave maps
Change, wherein, corresponding second inverse Fourier transform of arbitrary subband data at least two subband data
Points determined according to the data rate of the corresponding subband signal of the arbitrary subband data；
Respectively Cyclic Prefix is added at least two subband data after the second inverse Fourier transform,
Generate corresponding subband signal.
31. emitters according to any one of claim 24-30, it is characterised in that it is described at least
The data rate of arbitrary subband signal is true according to the bandwidth of arbitrary subband signal in two subband signals
It is fixed.
32. emitters according to any one of claim 23-31, it is characterised in that the process
Implement body is additionally operable to：By the effective band of at least two subband signal according to frequency spectrum mapping ruler successively
It is mapped on different frequencies.
33. emitters according to claim 32, it is characterised in that the frequency spectrum mapping ruler is
Protection interval is reserved between the effective band of two neighboring subband signal.
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| CN201510724560.6A CN106656892B (en) | 2015-10-30 | 2015-10-30 | Method and device for transmitting data |
| PCT/CN2016/103316 WO2017071574A1 (en) | 2015-10-30 | 2016-10-25 | Method and device for sending data |
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| WO2019052033A1 (en) * | 2017-09-13 | 2019-03-21 | 中国电子科技集团公司第四十一研究所 | F-ofdm modulation method and apparatus suitable for 5g system |
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| CN101197592A (en) * | 2006-12-07 | 2008-06-11 | 华为技术有限公司 | Far-end cross talk counteracting method and device, signal transmission device and signal processing system |
| CN101557375A (en) * | 2008-04-09 | 2009-10-14 | 展讯通信（上海）有限公司 | Wireless transmission method based on sub-band and device thereof |
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| WO2006125343A1 (en) * | 2005-05-25 | 2006-11-30 | Shanghai Institute Of Microsystem And Information Technology | A orthogonal frequency-time division multiplex transmitter, a receiver and methods |
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| WO2013139395A1 (en) * | 2012-03-23 | 2013-09-26 | Huawei Technologies Co., Ltd. | Method for digitally compensating a phase response of an optical channel |
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| CN101083639A (en) * | 2006-06-01 | 2007-12-05 | 上海无线通信研究中心 | Fraction time sampling based filter group and filtering method |
| CN101197592A (en) * | 2006-12-07 | 2008-06-11 | 华为技术有限公司 | Far-end cross talk counteracting method and device, signal transmission device and signal processing system |
| CN101557375A (en) * | 2008-04-09 | 2009-10-14 | 展讯通信（上海）有限公司 | Wireless transmission method based on sub-band and device thereof |
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Effective date of registration: 20211224 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: xFusion Digital Technologies Co., Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |