CN106961407A - A kind of data modulation, demodulation method and data modulation, demodulating equipment - Google Patents

Abstract

A kind of data modulation, demodulation method and data modulation, demodulating equipment, the data modulating device of transmitting node carry out IFFT processing and FB processing to data, and the FB processing includes：The data sequence of continuous L symbol is modulated using piecewise function；The piecewise function includes N group functions, and the time domain length of every group of function is T, and the time domain length of the piecewise function is that the mark space after N × T, N >=2 or N >=3, the L symbol-modulated is T, L >=2.The data demodulating device of receiving node receives the data that transmitting node sent after FB processing, and in the way of the FB processing contraries carried out with the transmitting node, the data of reception are demodulated using the piecewise function.The application can preferably suppress band external leakage, can keep keeping compatibility with LTE as far as possible again.In receiving terminal, it is possibility to have preferable demodulation performance.

Description

A kind of data modulation, demodulation method and data modulation, demodulating equipment

Technical field

The present invention relates to the communications field, more particularly, to a kind of modulation of data, demodulation method and data Modulation, demodulating equipment.

Background technology

Long Term Evolution (LTE：Long Term Evolution) it is 4G (Fourth Generation) Radio honeycomb communication technology.LTE uses OFDM (OFDM：Orthogonal Frequency Division Multiplexing) technology, the running time-frequency resource composition LTE that subcarrier and OFDM symbol are constituted The radio physical running time-frequency resource of system.Current OFDM technology is in wireless communications using wider. As a result of cyclic prefix (CP：Cyclic prefix), CP-OFDM systems can solve many Footpath delay problem, and frequency-selective channel be divide into a set of parallel flat channel, this is well Channel estimation methods are simplified, and have higher precision of channel estimation.However, CP-OFDM systematic functions The frequency deviation adjacent sub-bands and when it is partially more sensitive, this compares mainly due to the spectrum leakage of the system Greatly, thus be easily caused intersubband interference.Current LTE system has used protection interval on frequency domain, but So reduce spectrum efficiency, it is therefore desirable to suppress band external leakage using some new technologies.

Present each major company in the radio communication 5G that begins one's study (Fifth Generation) technology, wherein, Suppression is an important directions of 5G technical research with external leakage.The new filter that some nearest documents are mentioned Ripple device group multicarrier (FBMC：Filter Bank Multicarrier) and general frequency division multiplexing (GFDM： Generalized Frequency Division Multiplexing) technology, band external leakage can be suppressed, still There is compatibility issue in these technologies and LTE CP-OFDM technologies, but also there is channel estimation and ask Topic and with multiple-input and multiple-output (MIMO：Multiple Input Multiple Output) technology mutually ties Conjunction problem etc..F-OFDM (Filtered OFDM) that other documents are mentioned, general filtering multicarrier (UFMC：Universal Filtered Multicarrier) technology, although the CP-OFDM skills with LTE Art has certain compatibility, but it is not fine to suppress the effect with external leakage, and the subcarrier in bandwidth it Between there is still a need for strict synchronization, i.e., to the frequency deviation in subband and when partially still more sensitive, and reception End demodulation performance has also declined.

Therefore need to propose a kind of good method, band external leakage can be suppressed well, can keep as far as possible again It is compatible with LTE system.

The content of the invention

In view of this, the invention provides following technical scheme.

A kind of data modulation method, applied to transmitting node, including：

Inverse fast fourier transform IFFT processing and wave filter group FB processing are carried out to data, wherein, institute Stating FB processing includes：The data sequence of continuous L symbol is modulated using piecewise function；It is described Piecewise function includes N group functions, and the time domain length of every group of function is T, and the time domain of the piecewise function is long Spend for N × T, N >=2 or N >=3, the mark space after the L symbol-modulated is T, L >=2.

A kind of data modulating device, applied to transmitting node, including inverse fast fourier transform IFFT processing Module and wave filter group FB processing modules, wherein：The FB processing modules are used to use piecewise function pair The data sequence of continuous L symbol is modulated；The piecewise function includes N group functions, every group of function Time domain length be T, the time domain length of the piecewise function is N × T, N >=2 or N >=3, the L Mark space after individual symbol-modulated is T, L >=2.

A kind of data demodulation method, applied to receiving node, including：

The data after the filtered device group FB processing that transmitting node is sent are received, the FB processing is according to this Data are modulated by the described either type of application using piecewise function；

The data of reception are demodulated using the piecewise function.

A kind of data demodulating device, applied to receiving node, including：

Data reception module, the number after the group of device after filtering FB processing for receiving transmitting node transmission According to the FB processing uses either type described herein, and data are modulated using piecewise function；

Data demodulation module, for being demodulated using the piecewise function to the data of reception.

Such scheme can preferably suppress band external leakage compared with LTE system, can keep as far as possible and LTE again Compatibility.In receiving terminal, it is possibility to have preferable demodulation performance.

In view of this, present invention also offers following technical scheme.

A kind of data modulation method, applied to transmitting node, including：

Data sequence to multiple symbols carries out inverse fast fourier transform IFFT processing；

Data sequence to each symbol after IFFT is handled adds cyclic prefix CP；

Data sequence to multiple symbols after addition CP is filtered device group FB processing.

A kind of data modulating device, applied to transmitting node, including：

Inverse fast fourier transform IFFT processing modules, IFFT is carried out for the data sequence to multiple symbols Processing；

Cyclic prefix CP processing module, for the data sequence to each symbol after IFFT is handled Add CP；

Wave filter group FB processing modules, are filtered for the data sequence to multiple symbols after addition CP Ripple device group FB processing.

It is preferred that the FB processing is in the way of described in the application is any, using piecewise function to data It is modulated.

Such scheme adds CP before FB processing is carried out, with more preferable compatibility.

Brief description of the drawings

Fig. 1 is the flow chart of the data modulation method of the embodiment of the present invention one；

Fig. 2 is the module map of the data modulating device of the embodiment of the present invention one；

Fig. 3 is the oscillogram for the sectional-continuous function that example of the present invention is used；

Fig. 4 is the oscillogram for another sectional-continuous function that example of the present invention is used；

Fig. 5 is the flow chart of the data demodulation method of the embodiment of the present invention two；

Fig. 6 is the module map of the data demodulating device of the embodiment of the present invention two；

Fig. 7 is the flow chart of the data modulation method of the embodiment of the present invention three；

Fig. 8 is the module map of the data modulating device of the embodiment of the present invention three.

Embodiment

For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing Embodiments of the invention are described in detail.It should be noted that in the case where not conflicting, this Shen Please in embodiment and the feature in embodiment can mutually be combined.

Embodiment one

The present embodiment proposes, when the transmitting node of multicarrier system carries out FB processing to data, to use segmentation The method that function pair data are modulated.The transmitting terminal of multicarrier system includes base station, terminal, relaying (relay), the various transmitting equipment of launch point (transmitting point) etc., the application sends out these Jet device is referred to as transmitting node, and the various processing to data can be considered that data are modulated.

The FB processing is otherwise referred to as multiphase filtering processing, or is multiphase filtering modulation.Due to multiphase Include multiple filtering process in filtering process to carry out parallel, the application handles multiphase filtering (or multiphase Filtering modulation) it is also referred to as wave filter group FB (Filter Bank) processing (or FB modulation).The FB Parameter in processing is determined according to the piecewise function of the present embodiment.

As shown in figure 1, the present embodiment data modulation method includes：

Step 110, IFFT processing is carried out to data；

Between this step IFFT processing and the FB processing of next step, other can also be increased and treated Journey, the present invention is not specifically limited.For example, after this step is performed, can also be to by IFFT Data addition cyclic prefix CP after reason, then perform step 120.

Step 120, FB processing is carried out to data, the FB processing includes：Using piecewise function to even The data sequence for continuing L symbol is modulated；The piecewise function includes N group functions, every group of function Time domain length is T, and the time domain length of the piecewise function is N × T, N >=2, the L symbol-modulated Mark space afterwards is T, L >=2.

In the application, piecewise function refers to nonvanishing function value using multiple mathematic(al) representations in different independents variable Interval is combined to the function represented, can be the continuous function of segmentation or the discrete function of segmentation.

The continuous function of one non-segmentation can be represented with single mathematic(al) representation, and segmentation is continuous The nonvanishing function value of function needs to use multiple mathematic(al) representations to be combined in different independent variable intervals Represent, line translation can not be entered by the displacement of independent variable and the operation of finding limit between multiple mathematic(al) representations. The discrete function of segmentation is the piecewise function that independent variable is discrete independent variable, passes through the continuous function to segmentation Sampling is obtained.During being modulated using piecewise function, shifting can be circulated to the piecewise function Position.Therefore the piecewise function of the application can also be the segmentation to being obtained after a certain piecewise function cyclic shift Function.

The piecewise function of the present embodiment is symmetrical as axle using the interval intermediate point of function argument.That is the left side NT/2 sections and the right NT/2 sections of functional value is symmetrical.The time domain length of the piecewise function can To be extended by increasing by 0 value, such as the piecewise function for N × T length can be in the independent variable One section of independent variable interval that interval one side increase functional value is 0 so that independent variable interval total length is changed into (N+1)×T.Because N is that thus N is positive integer to group number, it is preferred that N >=3.

In the present embodiment, the maximum time span between the nonvanishing function value independent variable of the piecewise function is big In equal to 2T or 3T.

In the present embodiment, there is every group of function of nonvanishing function value in the N group functions that piecewise function includes, The interval interlude interval closer to the piecewise function independent variable of its independent variable, this group of function its from The modulus value sum of functional value on range of variables is bigger, and the modulus value of real number is its absolute value.The present embodiment Piecewise function can be step function.

The time domain length of above-mentioned piecewise function is the interval time domain length of its independent variable.Every group in piecewise function Argument of function interval is one or more snippets in the multistage independent variable interval that piecewise function includes.Every group Function can be piecewise function or non-piecewise function.The time domain length of every group of function is this group of letter The interval time domain length of several independents variable, the time domain length for the N group functions that the piecewise function includes is equal, It is T.

In one example, the data sequence of continuous L symbol is modulated using piecewise function, wrapped Include：Using the discrete function value of the piecewise function to the data of each symbol in the continuous L symbol Sequence is modulated respectively, then L obtained data sequence is overlapped.

Specifically, it can be handled according to the following steps：

Data sequence to each symbol carries out repetitive extension, and the length for obtaining each symbol is N × T Data sequence；

The data sequence for the use of the discrete function value of the piecewise function being N × T with the length of each symbol Row carry out dot product respectively, obtain the data sequence that L length is N × T.

The L length staggered successively for N × T data sequence in time domain and be overlapped after T, Obtain the data sequence after the continuous L symbol-modulated.

In above-mentioned example, mark space (time interval between adjacent-symbol) T after L symbol-modulated Value can be arranged by standard/protocol.If it is optional, it can be selected by transmitting node oneself, It can also be configured by corresponding node and by transmitting signaling downwards, for example, transmitting node can be by when being UE Base station configuration T value is simultaneously handed down to UE.Before being modulated to the data sequence of continuous L symbol, The length of the data sequence of each symbol can be equal to T, might be less that or more than T, the present invention to this not Do and limit to.The present embodiment is carried out plus CP processing, and T is set as the number of each symbol after adding CP to handle According to the length of sequence.If T is not equal to the length of the data sequence of each symbol before modulation, above-mentioned right The data sequence of each symbol carries out repetitive extension, includes to modulate the data sequence of preceding each symbol Length is the repetitive extension in cycle, and the data sequence after repetitive extension is blocked or added circulation The processing of prefix, suffix, so that its length is equal to N × T.

In another example, the data sequence of continuous L symbol is modulated using piecewise function, wrapped Include：Convolution fortune is carried out to the data sequence of continuous L symbol using the discrete function value of the piecewise function Calculate.Specifically, it can handle according to the following steps：

Data sequence to the continuous L symbol progressively shifts the sampling packet of M times of progress successively, obtains To M group data sequence S (m), m=1,2 ... ..., M, the length of every group of data sequence is L；

Discrete function value to the piecewise function carries out M times of sampling packet, obtains M group data sequences Y (m), m=1,2 ... ..., M are arranged, every group of data sequence length is N；

Data sequence S (m) and data sequence Y (m) is subjected to convolution, M group data sequence R (m) are generated, I.e.

M group data sequence R (m) are arranged according to treaty rule, obtained after the continuous L symbol-modulated Data sequence；

Wherein, M is the number of the discrete function value that every group of function is included in the piecewise function, and described The number for the discrete data that the data sequence of each symbol is included in mark space T, M >=2.M group numbers According to equivalent to one two-dimensional matrix R [M, N+L-1] of serial R (m), the row and column of the matrix be respectively M and N+L-1.It is described above that M group data series R (m) are arranged in one group of data series according to certain rule, Since first row, an one-dimensional matrix is arranged in order into equivalent to by two-dimensional matrix R [M, N+L-1]. This operation equivalent to reshap (R [M, N+L-1], 1, M* (N+L-1)) function in matlab.

In two examples above, data have been transformed to discrete data sequences after IFFT, if the segmentation Function is continuous function, and the discrete function value of the piecewise function is sampled by the value to the continuous function Obtain, the interval of the sampling equal in the data sequence of each symbol between adjacent discrete data when Between be spaced；If the piecewise function is discrete function, in the piecewise function every group of function include from Dissipate the number of functional value, the dispersion number included with the data sequence of each symbol in mark space T According to number it is identical.

In above-mentioned two example, the data sequence of continuous L symbol can be after IFFT is handled Discrete data sequences；It can also be the dispersion number after IFFT processing and addition cyclic prefix CP processing According to sequence.Alternatively, the continuous L symbol is in multicarrier system in a subframe or a resource Symbol on block is but it is also possible to be the multiple symbols included in other resource units.

The one group of data sequence finally obtained in above-mentioned two example, digital-to-analogue conversion can be carried out again and corresponding Radio frequency processing, then launch from antenna.

The present embodiment additionally provides a kind of data modulating device, applied to transmitting node, as shown in Fig. 2 Including IFFT processing modules 10 and FB processing modules 20, wherein, the FB processing modules are used to use Piecewise function is modulated to the data sequence of continuous L symbol；The piecewise function includes N group functions, The time domain length of every group of function is T, and the time domain length of the piecewise function is N × T, N >=2 or N >=3, Mark space after the L symbol-modulated is T, L >=2.

Alternatively,

The piecewise function that the FB processing modules are used refers to nonvanishing function value and uses multiple mathematic(al) representations to exist Different independent variable intervals is combined to the function represented.

Alternatively,

The piecewise function that the FB processing modules are used is using the interval intermediate point of function argument as axle or so Symmetrically.

Alternatively,

Between the piecewise function that the FB processing modules are used, its corresponding independent variable of nonvanishing function value most Big time span is more than or equal to 2T or 3T.

Alternatively,

There is nonvanishing function value in the N group functions that the piecewise function that the FB processing modules are used includes Every group of function, the interval interlude interval closer to the piecewise function independent variable of its independent variable, the group The modulus value sum of functional value of the function on its independent variable interval is bigger.

Alternatively,

The piecewise function that the FB processing modules are used is step function.

Alternatively,

The FB processing modules are modulated using piecewise function to the data sequence of continuous L symbol, Including：Using the discrete function value of the piecewise function to the number of each symbol in the continuous L symbol It is modulated respectively according to sequence, then L obtained data sequence is overlapped.

Alternatively,

The FB processing modules include：

Expanding element, carries out repetitive extension for the data sequence to each symbol, obtains each symbol Number length be N × T data sequence；

Dot product unit, is N × T's for the length using the segmentation discrete function and each symbol Data sequence carries out dot product respectively, obtains the data sequence that L length is N × T；

Superpositing unit, the L length is staggered after T successively for N × T data sequence in time domain It is overlapped, obtains the data sequence after the continuous L symbol-modulated.

Alternatively,

The FB processing modules are modulated using piecewise function to the data sequence of continuous L symbol, Including：Convolution is carried out to the data sequence of continuous L symbol using the discrete function value of the piecewise function Computing.

Alternatively,

The FB processing modules include：

First sampling unit, progressively shifts for the data sequence to the continuous L symbol and carries out successively M times of sampling packet, obtains M group data sequence S (m), m=1,2 ... ..., M, every group of data sequence Length is L；

Second sampling unit, the sampling for carrying out M times for the discrete function value to the piecewise function is grouped, Obtain M group data sequence Y (m), m=1,2 ... ..., M, every group of data sequence length is N；

Convolution unit, for data sequence S (m) and data sequence Y (m) to be carried out into convolution, generates M group numbers According to sequence R (m), i.e.,

Arrangement units, for M group data sequence R (m) to be arranged according to treaty rule, obtain described continuous Data sequence after L symbol-modulated；

Wherein, M is the number of the discrete function value that every group of function is included in the piecewise function, and described The number for the discrete data that the data sequence of each symbol is included in mark space T, M >=2.

Alternatively,

The piecewise function that the FB processing modules are used is continuous function, the discrete function of the piecewise function Value is obtained by the value sampling to the continuous function, and the interval of the sampling is equal to each symbol Time interval in data sequence between adjacent discrete data；Or

The piecewise function that the FB processing modules are used is every group of function in discrete function, the piecewise function Comprising discrete function value number, included with the data sequence of each symbol in mark space T Discrete data number it is identical.

Alternatively,

The data sequence of the continuous L symbol of the FB processing modules processing is the IFFT processing Module carries out the discrete data sequences after IFFT processing；Or

Described device also includes：Cyclic prefix CP processing module；It is described that the FB processing modules are handled The data sequence of continuous L symbol, is that the IFFT processing modules carry out after IFFT processing and pass through institute State the discrete data sequences after CP processing modules addition CP.

Alternatively,

The continuous L symbol of FB processing modules processing is in multicarrier system in a subframe Or the symbol on a Resource Block.

Illustrated below with an example in concrete application.

Assuming that a subframe (or a data block) for multicarrier system includes K subcarrier and L symbol Number, Deta bearer is on each subcarrier of each symbol, namely each RE (Resource Element) On.This example is IFFT to each symbol, then again plus after CP, obtains in each symbol time domain Discrete data sequences.Assuming that L=3, the time domain discrete data sequence of this 3 symbols be respectively A1 (m), A2 (m), A3 (m), wherein m=1,2,..., M, M be each symbol discrete data sequences Length.

Assuming that the group number N=3 of the piecewise function used, then divide in 3T time intervals [- 3T/2,3T/2] Section continuous function is as shown in figure 3, specific mathematic(al) representation is as follows：

It should be noted that, although number N and symbolic number L is organized in this example is equal to 3, but this only shows Example property, N and L simultaneously need not be equal.

From above-mentioned formula as can be seen that this argument of function interval [- 3T/2,3T/2] is divided into 9 sections, Each section represents the functional value of respective bins using a mathematic(al) representation, has non-zero on these intervals Functional value (but being not excluded for null value), that is to say, that the nonvanishing function value of the function uses multiple mathematics Expression formula is combined to represent in different independent variable intervals, therefore the function is the continuous function of segmentation. The continuous function of this segmentation is sampled, it is possible to obtain the discrete function of segmentation.Need exist for It is bright, if the continuous function of a non-segmentation independent variable it is interval on one side or both sides increase by one section or Multistage independent variable is interval, but the interval corresponding functional value of increased independent variable is 0, then the non-segmentation Continuous function and obtained discrete function of being sampled to it, are not admitted to the piecewise function described in the application.

The sectional-continuous function that above-mentioned formula is represented includes 3 groups of functions, this 3 groups of argument of function areas Between be respectively：[-3T/2,-T/2)、[-T/2,T/2)、[T/2,3T/2).As can be seen that each group of function is still It is so the continuous function of segmentation.In above-mentioned formula, the independent variable of piecewise function is interval centered on 0, but This is exemplary, and the present invention is not limited to this.

In another example, continuous function such as Fig. 4 of segmentation in 3T time intervals [- 3T/2,3T/2] Shown, specific mathematic(al) representation is as follows：

The nonvanishing function value that can be seen that this function from this formula is also existed using multiple mathematic(al) representations Different independent variable intervals is combined to represent, therefore is also the continuous function of segmentation.To this segmentation Continuous function sampled, it is possible to obtain segmentation discrete function.The continuous function bag of this segmentation Containing 3 groups of functions, this 3 groups of argument of function intervals are respectively：[-3T/2,-T/2)、[-T/2,T/2)、 [T/2,3T/2), this 3 groups of functions are the continuous function of non-segmentation.

Above-mentioned Fig. 3 and Fig. 4 piecewise function waveform are similar to staircase waveform, therefore by Fig. 3's and Fig. 4 Piecewise function is referred to as step function.In figs. 3 and 4, the plateau value of 2 ladders is respectively 1 and 1/2, The plateau value of higher than two side sections of the plateau value of interlude.In actual use, we can adjust these The plateau value of ladder, such as can be adjusted to 1 by the plateau value of stage casing section, by the plateau value of two side sections It is adjusted to 1/4, etc..

Using the sampling interval during discrete data sequences for obtaining each symbol, piecewise function y (t) is sampled Afterwards, just obtain the discrete function value Y (i) of the piecewise function, i=-3M/2,1-3M/2,...、3M/2-1. It is assumed here that M is even number.

The discrete data sequences of 3 symbols are modulated using the discrete function value Y (i) of piecewise function, Including：

(1) by the discrete data sequences repetitive extension of each symbol to 3M length, such as A1 (m) is expanded to Data sequence EA1 (i)=[A1 (m), A1 (m), A1 (m)], wherein, m=1,2,..., M, i=-3M/2, 1-3M/2、..., 3M/2-1, similarly, A2 (m) expand to data sequence EA2 (i)=[A2 (m), A2 (m), A2 (m)], A3 (m) expands to data sequence EA3 (i)=[A3 (m), A3 (m), A3 (m)].

(2) discrete data sequences of each symbol after repetitive extension are subjected to dot product with Y (i) respectively, obtained The discrete data sequences for being 3M to 3 length：

EAY1 (i)=EA1 (i) .*Y (i)；

EAY2 (i)=EA2 (i) .*Y (i)；

EAY3 (i)=EA3 (i) .*Y (i)；

Wherein " .* " is the dot product operation between data vector.

(3) obtain 3 length are folded after staggering time T successively for 3M discrete data sequences Plus, namely the M sampled point that stagger be overlapped.

The superposition can be expressed as follows：

EAY123 (i)=[EAY1 (i1), EAY1 (i2)+EAY2 (i2-M), EAY1 (i3)+EAY2 (i3-M)+ EAY3(i3-2M),EAY2(i4-M)+EAY3(i4-2M),EAY3(i5-2M)]；

Wherein, i1=-3M/2,1-3M/2,...、-M/2-1；

I2=-M/2,1-M/2,...、M/2-1；

I3=M/2,1+M/2,...、3M/2-1；

I4=3M/2,1+3M/2,...、5M/2-1；

I5=5M/2,1+5M/2,...、7M/2-1；

I=-3M/2,1-3M/2,...、7M/2-1；

New data sequence EAY123 (i) total length is 5M after superposition.After superposition in new data sequence, Each symbol lengths are 3T, and mark space is T, and 3 symbols T that staggers is superimposed.

Modulated as a result of length for N × T piecewise function (such as segmented waveform function), relative to For the length that LTE is used is T square waveform FUNCTION MODULATION, it can preferably suppress band external leakage.By It can be set in the length T of every group of function, the time domain data of each symbol can add CP, that is to say, that every The mode of the mode and each symbol-modulated data of LTE of group FUNCTION MODULATION data is similar, therefore can be very Good keeps compatibility with LTE.

Embodiment two

The present embodiment is related to data demodulation.Receiving terminal in communication system includes base station, terminal, relaying Etc. (relay) these receiving devices are referred to as receiving node by various receiving devices, the application.

The data demodulation method of the present embodiment is used for receiving node, as shown in figure 5, including：

Step 210, the data after the filtered device group FB processing that transmitting node is sent, the FB are received Processing by embodiment one it is any it is described in the way of, data are modulated using piecewise function；

Step 220, the data of reception are demodulated using the piecewise function.

Above-mentioned piecewise function is the piecewise function in embodiment one, is repeated no more here.In step 220, Receiving node can use the segmentation in the way of the FB processing contraries carried out with the transmitting node The data that function pair is received are demodulated.After step 220, the data after demodulation can be believed Trace equalization and detection, recover the data before modulation.

The data demodulating device of the present embodiment as shown in fig. 6, applied to receiving node, including：

Data reception module 50, the number of the group of the device after filtering FB processing for receiving transmitting node transmission According to, FB processing by embodiment one it is any it is described in the way of, data are carried out using piecewise function Modulation；

Data demodulation module 60, for being demodulated using the piecewise function to the data of reception.It is above-mentioned Piecewise function is the piecewise function in embodiment one.

Alternatively, the data demodulating device also includes：Channel equalization and detection module, for described Data after data demodulation module demodulation carry out channel equalization and detection, recover the data before modulation.

The present embodiment is different from the function that existing demodulation mode is used.Although the data of adjacent-symbol pass through N It can be superimposed and disturb after group FUNCTION MODULATION, but value (such as step function for every section of piecewise function for passing through setting The value of each step) interference can be reduced, in conjunction with interference cancellation techniques, receiving node, which can have, to be compared Good demodulation performance.The piecewise function modulation for employing that length is NT is additionally, since, relative to LTE For the length used is T square waveform FUNCTION MODULATION, main lobe of the subcarrier on frequency domain can be caused Narrowed width, the main lobe of such adjacent sub-carrier would not occur it is overlapping, also there will be no very big interference, Therefore adjacent sub-carrier can be with asynchronous.That is, user resources scheduling least unit can be with sub- load Ripple is that can not needed between unit, and user synchronously.

Embodiment three

A kind of data modulation method is present embodiments provided, applied to transmitting node, as shown in fig. 7, bag Include：

Step 310, the data sequence to multiple symbols carries out inverse fast fourier transform IFFT processing；

Step 320, the data sequence to each symbol after IFFT is handled adds cyclic prefix CP；

Step 330, the data sequence to multiple symbols after addition CP is filtered device group FB processing.

The present embodiment additionally provides a kind of data modulating device, applied to transmitting node, as shown in figure 8, Including：

Inverse fast fourier transform IFFT processing modules 70, for the data sequence progress to multiple symbols IFFT processing；

Cyclic prefix CP processing module 80, for the data sequence to each symbol after IFFT is handled Row addition CP；

Wave filter group FB processing modules 90, are carried out for the data sequence to multiple symbols after addition CP Wave filter group FB processing.

The FB processing of the present embodiment can in embodiment one it is any it is described in the way of, use piecewise function Data are modulated.

The present embodiment adds CP before FB processing is carried out, with more preferable compatibility.

The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.Pass through the above Embodiment description, those skilled in the art can be understood that above-described embodiment method can Realized by the mode of software plus required general hardware platform, naturally it is also possible to by hardware, but very The former is more preferably embodiment in the case of many.Understood based on such, the technical side of the embodiment of the present invention The part that case substantially contributes to prior art in other words can be embodied in the form of software product Come, the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disc, CD) In, including some instructions to cause a station terminal equipment (can be mobile phone, computer, server, Or the network equipment etc.) perform method described in each embodiment of the invention.

The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every The equivalent structure or equivalent flow conversion made using description of the invention and accompanying drawing content, or directly or Connect and be used in other related technical fields, be included within the scope of the present invention.

Claims (34)

1. a kind of data modulation method of multicarrier system, applied to transmitting node, including：

Inverse fast fourier transform IFFT processing and wave filter group FB processing are carried out to data, its feature exists In：

The FB processing includes：The data sequence of continuous L symbol is modulated using piecewise function； The piecewise function includes N group functions, and the time domain length of every group of function is T, the piecewise function when Length of field is that the mark space after N × T, N >=2 or N >=3, the continuous L symbol-modulated is T, L >=2.

2. the method as described in claim 1, it is characterised in that：

The piecewise function is referred to nonvanishing function value and entered using multiple mathematic(al) representations in different independent variable intervals The function that row combines to represent.

3. method as claimed in claim 2, it is characterised in that：

The piecewise function is symmetrical as axle using the interval intermediate point of function argument.

4. method as claimed in claim 2, it is characterised in that：

Maximum time span between the corresponding independent variable of the piecewise function nonvanishing function value is more than or equal to 2T or 3T.

5. the method as described in any in claim 2-4, it is characterised in that：

There is every group of function of nonvanishing function value, its independent variable is interval in the N group functions of the piecewise function Closer to the interlude that the piecewise function independent variable is interval, this group of function is on its independent variable interval The modulus value sum of functional value is bigger.

6. the method as described in any in claim 1-4, it is characterised in that：

The piecewise function is step function.

7. the method as described in claim 1, it is characterised in that：

The use piecewise function is modulated to the data sequence of continuous L symbol, including：Using institute The discrete function value for stating piecewise function is entered respectively to the data sequence of each symbol in the continuous L symbol Row modulation, then L obtained data sequence is overlapped.

8. method as claimed in claim 7, it is characterised in that：

Using the discrete function value of the piecewise function to the data of each symbol in the continuous L symbol Sequence is modulated respectively, then L obtained data sequence is overlapped, including：

Data sequence to each symbol carries out repetitive extension, and the length for obtaining each symbol is N × T Data sequence；

The data sequence for the use of the discrete function value of the piecewise function being N × T with the length of each symbol Row carry out dot product respectively, obtain the data sequence that L length is N × T；

The L length staggered successively for N × T data sequence in time domain and be overlapped after T, Obtain the data sequence after the continuous L symbol-modulated.

9. the method as described in claim 1, it is characterised in that：

The data sequence of continuous L symbol is modulated using piecewise function, including：Use described point The discrete function value of section function carries out convolution algorithm to the data sequence of continuous L symbol.

10. method as claimed in claim 9, it is characterised in that：

Convolution algorithm is carried out to the data sequence of continuous L symbol using the piecewise function, including：

Data sequence to the continuous L symbol progressively shifts the sampling packet of M times of progress successively, obtains To M group data sequence S (m), m=1,2 ... ..., M, the length of every group of data sequence is L；

Discrete function value to the piecewise function carries out M times of sampling packet, obtains M group data sequences Y (m), m=1,2 ... ..., M are arranged, every group of data sequence length is N；

Data sequence S (m) and data sequence Y (m) is subjected to convolution, M group data sequence R (m) are generated, I.e. $R\left(m\right)=S\left(m\right)\⊗Y\left(m\right),$ M=1,2 ..., M；

M group data sequence R (m) are arranged according to treaty rule, obtained after the continuous L symbol-modulated Data sequence；

Wherein, M is the number of the discrete function value that every group of function is included in the piecewise function, and described The number for the discrete data that the data sequence of each symbol is included in mark space T, M >=2.

11. the method as described in any in claim 7-10, it is characterised in that：

The piecewise function is continuous function, and the discrete function value of the piecewise function passes through to described continuous Function value sampling obtain, the sampling interval equal to each symbol data sequence in it is adjacent from Dissipate the time interval between data；Or

The piecewise function is discrete function, the discrete function value that every group of function is included in the piecewise function Number, the number of the discrete data included with the data sequence of each symbol in mark space T It is identical.

12. the method as described in claim 1, it is characterised in that：

The data sequence of the continuous L symbol is the discrete data sequences after IFFT is handled, or For the discrete data sequences after IFFT processing and addition cyclic prefix CP processing.

13. the method as described in claim 1, it is characterised in that：

The continuous L symbol is the symbol in a subframe or on a Resource Block in multicarrier system.

14. a kind of data demodulation method of multicarrier system, applied to receiving node, including：

The data after the filtered device group FB processing that transmitting node is sent are received, the FB processing is according to power Profit requires any described mode in 1-13, and data are modulated using piecewise function；

The data of reception are demodulated using the piecewise function.

15. method as claimed in claim 14, it is characterised in that：

After being demodulated using the piecewise function to the data of reception, also include：To the number after demodulation According to channel equalization and detection is carried out, the data before modulation are recovered.

16. a kind of data modulating device, applied to transmitting node, including inverse fast fourier transform IFFT Processing module and wave filter group FB processing modules, it is characterised in that：

The FB processing modules are used to adjust the data sequence of continuous L symbol using piecewise function System；The piecewise function includes N group functions, and the time domain length of every group of function is T, the piecewise function Time domain length be N × T, N >=2 or N >=3, the mark space after the L symbol-modulated is T, L >=2.

17. device as claimed in claim 16, it is characterised in that：

The piecewise function that the FB processing modules are used refers to nonvanishing function value and uses multiple mathematic(al) representations to exist Different independent variable intervals is combined to the function represented.

18. device as claimed in claim 17, it is characterised in that：

The piecewise function that the FB processing modules are used is using the interval intermediate point of function argument as axle or so Symmetrically.

19. device as claimed in claim 17, it is characterised in that：

Between the piecewise function that the FB processing modules are used, its corresponding independent variable of nonvanishing function value most Big time span is more than or equal to 2T or 3T.

20. the device as described in any in claim 17-19, it is characterised in that：

There is nonvanishing function value in the N group functions that the piecewise function that the FB processing modules are used includes Every group of function, the interval interlude interval closer to the piecewise function independent variable of its independent variable, the group The modulus value sum of functional value of the function on its independent variable interval is bigger.

21. the device as described in any in claim 16-19, it is characterised in that：

The piecewise function that the FB processing modules are used is step function.

22. device as claimed in claim 16, it is characterised in that：

The FB processing modules are modulated using piecewise function to the data sequence of continuous L symbol, Including：Using the discrete function value of the piecewise function to the number of each symbol in the continuous L symbol It is modulated respectively according to sequence, then L obtained data sequence is overlapped.

23. device as claimed in claim 22, it is characterised in that：

The FB processing modules include：

Expanding element, carries out repetitive extension for the data sequence to each symbol, obtains each symbol Number length be N × T data sequence；

Dot product unit, is N × T's for the length using the segmentation discrete function and each symbol Data sequence carries out dot product respectively, obtains the data sequence that L length is N × T；

Superpositing unit, the L length is staggered after T successively for N × T data sequence in time domain It is overlapped, obtains the data sequence after the continuous L symbol-modulated.

24. device as claimed in claim 16, it is characterised in that：

The FB processing modules are modulated using piecewise function to the data sequence of continuous L symbol, Including：Convolution is carried out to the data sequence of continuous L symbol using the discrete function value of the piecewise function Computing.

25. device as claimed in claim 24, it is characterised in that：

The FB processing modules include：

First sampling unit, progressively shifts for the data sequence to the continuous L symbol and carries out successively M times of sampling packet, obtains M group data sequence S (m), m=1,2 ... ..., M, every group of data sequence Length is L；

Second sampling unit, the sampling for carrying out M times for the discrete function value to the piecewise function is grouped, Obtain M group data sequence Y (m), m=1,2 ... ..., M, every group of data sequence length is N；

Convolution unit, for data sequence S (m) and data sequence Y (m) to be carried out into convolution, generates M group numbers According to sequence R (m), i.e., $R\left(m\right)=S\left(m\right)\⊗Y\left(m\right),$ M=1,2 ..., M；

Arrangement units, for M group data sequence R (m) to be arranged according to treaty rule, obtain described continuous Data sequence after L symbol-modulated；

Wherein, M is the number of the discrete function value that every group of function is included in the piecewise function, and described The number for the discrete data that the data sequence of each symbol is included in mark space T, M >=2.

26. the device as described in claim 22-25, it is characterised in that：

The piecewise function that the FB processing modules are used is continuous function, the discrete function of the piecewise function Value is obtained by the value sampling to the continuous function, and the interval of the sampling is equal to each symbol Time interval in data sequence between adjacent discrete data；Or

The piecewise function that the FB processing modules are used is every group of function in discrete function, the piecewise function Comprising discrete function value number, included with the data sequence of each symbol in mark space T Discrete data number it is identical.

27. device as claimed in claim 16, it is characterised in that：

The data sequence of the continuous L symbol of the FB processing modules processing is the IFFT processing Module carries out the discrete data sequences after IFFT processing；Or

Described device also includes：Cyclic prefix CP processing module；It is described that the FB processing modules are handled The data sequence of continuous L symbol, is that the IFFT processing modules carry out after IFFT processing and pass through institute State the discrete data sequences after CP processing modules addition CP.

28. device as claimed in claim 16, it is characterised in that：

The continuous L symbol of FB processing modules processing is in multicarrier system in a subframe Or the symbol on a Resource Block.

29. a kind of data demodulating device, applied to receiving node, including：

Data reception module, the number after the group of device after filtering FB processing for receiving transmitting node transmission According to, FB processing by claim 1-13 it is any it is described in the way of, use piecewise function logarithm According to being modulated；

Data demodulation module, for being demodulated using the piecewise function to the data of reception.

30. device as claimed in claim 29, it is characterised in that：

Described device also includes channel equalization and detection module, after being demodulated to the data demodulation module Data carry out channel equalization and detection, recover the data before modulation.

31. a kind of data modulation method, applied to transmitting node, including：

Data sequence to multiple symbols carries out inverse fast fourier transform IFFT processing；

Data sequence to each symbol after IFFT is handled adds cyclic prefix CP；

Data sequence to multiple symbols after addition CP is filtered device group FB processing.

32. method as claimed in claim 31, it is characterised in that：

The FB processing uses piecewise function pair in the way of as described in any in claim 1-13 Data are modulated.

33. a kind of data modulating device, applied to transmitting node, including：

Inverse fast fourier transform IFFT processing modules, IFFT is carried out for the data sequence to multiple symbols Processing；

Cyclic prefix CP processing module, for the data sequence to each symbol after IFFT is handled Add CP；

Wave filter group FB processing modules, are filtered for the data sequence to multiple symbols after addition CP Ripple device group FB processing.

34. device as claimed in claim 33, it is characterised in that：

When the FB processing modules carry out FB processing, according to the side as described in any in claim 1-13 Data are modulated by formula using piecewise function.