CN106230551A - Interleave unit and the wireless communication data that can generate pilot tone send, receive device - Google Patents
Interleave unit and the wireless communication data that can generate pilot tone send, receive device Download PDFInfo
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- CN106230551A CN106230551A CN201610592999.2A CN201610592999A CN106230551A CN 106230551 A CN106230551 A CN 106230551A CN 201610592999 A CN201610592999 A CN 201610592999A CN 106230551 A CN106230551 A CN 106230551A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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Abstract
The invention discloses a kind of interleave unit generating pilot tone, belong to wireless communication technology field.Comprising: one group of parallel interleaver, for input block being interleaved respectively process；One selector, the interleaving data for being exported according to each interleaver obtains the final of interleave unit and exports: the interleaving data being exported each interleaver, is constituted the imaginary pilot tone arrangement isometric with presetting pilot tone arrangement with the data of wherein fixed position；Select its imaginary pilot tone arrangement interleaver identical with presetting pilot tone arrangement, and using the interleaving data of this interleaver as finally exporting；If it is not, select its imaginary pilot tone to arrange and preset the interleaver that pilot tone arrangement is most like, and export as final after the imaginary pilot tone arrangement replacement in the interleaving data of this interleaver with default pilot tone arrangement.The invention also discloses a kind of wireless communication data dispensing device, receive device.The present invention can be in the case of need not pilot-frequency expense, it is achieved pilot-symbol aided channel estimation.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of interleave unit generating pilot tone.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing, OFDM) is as current
And the core technology of future wireless system, the multipath effect being effective against in radio transmission, simplifying equalizer design, reduction connects
Receipts machine complexity and power consumption, improve the availability of frequency spectrum.
Channel estimates (ChannelEstimation) one of key link as ofdm system, to signal transmission institute warp
The parameters such as the time delay of the wireless channel gone through, decay, multipath are estimated；The order of accuarcy that channel is estimated, to channel equalization, solution
Tune, decoding and transmitting terminal precoding etc. all have directly impact.
Existing channel estimation technique is broadly divided into blind Channel Estimation (Blind Channel Estimation) and pilot tone
The big class of assisted channel estimation (Pilot Assisted Channel Estimation) two.The former does not use pilot tone, utilizes transmission
Channel is estimated by some characteristics of data itself, and owing to it does not has pilot-frequency expense, the availability of frequency spectrum is higher, but its computing is multiple
Miscellaneous degree is the most considerable, and estimates to need more data to participate in, poor real every time, therefore seldom adopts in practical communication system
With.The latter is by inserting frequency pilot sign known to sending and receiving end within the data block, and receiving terminal utilizes the frequency pilot sign received and
The pilot symbol transmitted known, based on least square (LeastSquares, LS) or least mean-square error (Minimum Mean
Square Error, MMSE) etc. criterion wireless channel is estimated, but use the transmission speed reducing data after pilot tone
Rate；For reducing pilot-frequency expense, improve the availability of frequency spectrum, can fully excavate the openness of wireless channel, utilize compressed sensing
(Compressed Sensing) technology carries out sparse reconstruction, implements condition of sparse channel and estimates (Sparse Channel
Estimation).But no matter use which kind of existing pilot-symbol aided channel estimation method, be required for carrying out pilot tone at data sending terminal
The insertion of symbol, needs additionally to take the frequency spectrum resource of preciousness.
When wireless channel is more severe, the deep fade of last longer can cause transmission data continuous bunchiness occur
Mistake, cause receiving terminal channel decoding cannot error correction, therefore, after transmitting terminal constellation point, a sub-symbol friendship can be carried out
Knit (Symbol Interleaving), reset sending symbol, thus by the mistake discretization of continuous bunchiness, randomization,
Enable the effectively error correction of receiving terminal channel decoding.
In prior art, insert pilot tone and symbol interleaving both operations uses the most simultaneously, but typically two independences
Step, and need also exist for additionally taking frequency spectrum resource (pilot-frequency expense).
Summary of the invention
The technical problem to be solved is to overcome prior art not enough, it is provided that a kind of intertexture generating pilot tone
Unit, can generate pilot tone in the fixed position in interleaving data while being interleaved data processing, thus can be not required to
In the case of wanting pilot-frequency expense, it is achieved pilot-symbol aided channel estimation.
The present invention is by the following technical solutions:
A kind of interleave unit generating pilot tone, including:
One group of parallel interleaver, for being interleaved process respectively to input block；
One selector, the interleaving data for being exported according to each interleaver obtains the final output of interleave unit, tool
Body method is as follows: the interleaving data being exported each interleaver, is constituted with the data of wherein fixed position and presets pilot tone
The imaginary pilot tone arrangement arranging isometric；The friendship that the arrangement of its imaginary pilot tone is identical with presetting pilot tone arrangement is selected from all interleavers
Knit device, and using the interleaving data of this interleaver as final output；Without such interleaver, then from all interleavers
Select the arrangement of its imaginary pilot tone and preset the interleaver that pilot tone arrangement is most like, and with presetting pilot tone arrangement by the friendship of this interleaver
Imaginary pilot tone arrangement in organization data exports as final after replacing.
Techniques below scheme can also be obtained according to above-mentioned interleave unit:
A kind of wireless communication data dispensing device, includes successively according to the flow direction of data to be sent: CRC check position is added single
Unit, channel encoding unit, constellation point unit, interleave unit, subcarrier mapping unit, IFFT unit, protection interval are inserted
Unit, upconverting unit；Described interleave unit is the interleave unit that can generate pilot tone described in above technical scheme.
Preferably, the number K of the parallel interleaver in described interleave unit meets following formula:
Wherein, Q represents the exponent number of constellation point unit,Floor operation in expression, d represents the length that default pilot tone is arranged
Degree,For default expected probit.
A kind of wireless communication data receives device, for receiving the data that device described in any of the above-described technical scheme sends；
The flow direction according to received data includes successively: down-converter unit, protection interval removal unit, FFT unit, subcarrier demapping
Unit, channel estimating unit, channel equalization unit, deinterleaving unit, constellation point de-mapping unit, channel decoding unit, CRC school
Verification certificate unit, selection unit；First described channel estimating unit arranges according to described default pilot tone, from subcarrier de-mapping unit
Output data extract the pilot tone arrangement received, and then utilize the pilot tone received arrangement and the arrangement of described default pilot tone to carry out letter
Road is estimated；Described deinterleaving unit includes one group of parallel deinterleaver, with the interleaver one_to_one corresponding in described interleave unit；
Constellation point de-mapping unit, channel decoding unit, CRC check unit include with the deinterleaver deinterleaved in unit one by one respectively
One group of corresponding parallel constellation point de-mapping device, channel decoder, CRC check device, each deinterleaver is corresponding with it
Constellation point de-mapping device, channel decoder, CRC check device constitute a branch road；Described selection unit is for selecting from each branch road
The data selecting a correct branch road of CRC check export.
In order to reduce the quantity of the interleaver used in data sending device, based on identical invention thinking, the present invention enters
One step proposes following one group technical scheme:
A kind of interleave unit generating pilot tone, including:
Packet module, for being divided into G data sub-block by input block；
G parallel parallel interleaver group, with described G data sub-block one_to_one corresponding；Each parallel interleaver group includes
One group of parallel interleaver and a selector；Described one group of parallel interleaver is for inputting its place parallel interleaver
The data sub-block of group is interleaved processing respectively；Described selector is for according to interleaver institute each in its place parallel interleaver group
The interleaving data of output obtains the final output of this parallel interleaver group, and concrete grammar is as follows: exported each interleaver
Interleaving data, with the data of wherein fixed position constituted with corresponding to this parallel interleaver group default pilot tone arrange isometric
Imaginary pilot tone arrangement；The arrangement of its imaginary pilot tone is selected to preset with described from all interleavers of this parallel interleaver group
The pilot tone identical interleaver of arrangement, and using the interleaving data of this interleaver as the output of place parallel interleaver group；If
There is no such interleaver, then from all interleavers of this parallel interleaver group, select the arrangement of its imaginary pilot tone lead with presetting
The interleaver that frequency arrangement is most like, and with presetting the arrangement of pilot tone, imaginary pilot tone in the interleaving data of this interleaver is arranged
As the output of place parallel interleaver group after cloth replacement；The arrangement of described default pilot tone pre-sets by the following method: will
Preset pilot tone arrangement and be divided into parallel interleaver group one to one G the default pilot tone arrangement parallel with described G；
Data combination module, for being combined G output of described G parallel interleaver group, obtains interleave unit
Final output.
A kind of wireless communication data dispensing device, includes successively according to the flow direction of data to be sent: CRC check position is added single
Unit, channel encoding unit, constellation point unit, interleave unit, subcarrier mapping unit, IFFT unit, protection interval are inserted
Unit, upconverting unit；Described interleave unit is the interleave unit that can generate pilot tone described in above technical scheme.
Preferably, the number k of the interleaver in jth parallel interleaver group in described interleave unitjMeet following formula:
Wherein, Q represents the exponent number of constellation point unit,Floor operation in expression, djRepresent that jth presets pilot tone
The length of arrangement,For default probit, j=1,2 ..., G.
A kind of wireless communication data receives device, for receiving the data that device described in any of the above technical scheme sends；
The flow direction according to received data includes successively: down-converter unit, protection interval removal unit, FFT unit, subcarrier demapping
Unit, channel estimating unit, channel equalization unit, data packet units, deinterleaving unit, data arrangement unit, constellation point solution
Map unit, channel decoding unit, CRC check unit, selection unit；First described channel estimating unit is led according to described presetting
Frequency arrangement, extracts the pilot tone arrangement received, then utilizes the pilot tone received from the output data of subcarrier de-mapping unit
Arrangement and the arrangement of described default pilot tone carry out channel estimation；Described data packet units is for according to packet in interleave unit
The data that channel equalization unit is exported by the mode of module are grouped；Described deinterleaving unit includes G parallel parallel solution
G parallel interleaver group one_to_one corresponding in interleaver group, with described interleave unit, each parallel deinterleaver group includes with right
Answer the one group of parallel deinterleaver one to one of the interleaver in parallel interleaver group；Data arrangement unit is for by G also
The output of row deinterleaver group is spliced, and obtainsPlant data combination, kiRepresent i-th parallel deinterleaver group
In deinterleaver quantity；Constellation point de-mapping unit, channel decoding unit, CRC check unit include and described N kind number respectively
According to combining the most parallel N number of constellation point de-mapping device, N number of channel decoder, N number of CRC check device, every kind of data set
Close the branch road that output is constituted to its corresponding constellation point de-mapping device, channel decoder, CRC check device；Described selection is single
Unit is used for the data of the branch road that selection CRC check is correct from each branch road and exports.
Above-mentioned imaginary pilot tone is arranged and presets between pilot tone arrangement, and the arrangement of imaginary pilot tone is arranged with presetting pilot tone
Between similarity can use existing various similarity measurement, present invention preferably uses Euclidean distance or standard Euclidean away from
From or manhatton distance, distance the least, similarity is the biggest.
Compared to existing technology, the method have the advantages that
The present invention utilizes data interlacing to generate pilot tone, it is entirely avoided pilot-frequency expense, improves the availability of frequency spectrum, and channel
Estimate that performance is close with existing pilot-symbol aided channel estimation performance.
The present invention uses block interleaved technology further during utilizing data interlacing to generate pilot tone, effectively reduces and sends out
The parallel interleaver number of sending end, reduces the complexity of transmitting terminal, is particularly suited for during uplink communication mobile terminal as sending out
The scene of sending end.
Accompanying drawing explanation
Fig. 1 is the system block diagram of one embodiment of wireless communication system of the present invention.
Fig. 2 is the system BLER performance pair that the present invention and existing insertion pilot schemes all use LS channel estimation
Ratio.
Fig. 3 is the system BLER performance comparison that the present invention uses that LS channel estimation and condition of sparse channel are estimated respectively.
Fig. 4 is the system block diagram of another embodiment of wireless communication system of the present invention.
Fig. 5 is parallel interleaver group structure chart.
Fig. 6 is parallel deinterleaver group structure chart.
Fig. 7 is that the present invention is grouped scheme and the present invention and all uses system BLER of LS channel estimation regardless of prescription case
Performance comparison.
Fig. 8 is system BLER that the present invention is grouped that scheme uses LS channel estimation and condition of sparse channel to estimate respectively
Can contrast.
Detailed description of the invention
Embodiment one
Wireless communication system in the present embodiment as it is shown in figure 1, the binary data blocks of transmitting terminal to first pass through circulation superfluous
Redundancy checksum (Cyclic Redundancy Check, CRC) unit, passes sequentially through channel encoding unit, chnnel coding list afterwards
Unit, interleave unit, subcarrier mapping unit, inverse fast fourier transform (Inverse Fast Fourier Transform,
IFFT) unit, protection spacer units and upconverting unit, be emitted into wireless channel.Wherein, interleave unit is by parallel K
Interleaver and a selector cascade are constituted, as shown in Figure 1.
The data block that receiving terminal receives passes sequentially through down-converter unit, removes protection spacer units, fast fourier transform
(Fast Fourier Transform, FFT) unit, subcarrier de-mapping unit, channel estimating unit, channel equalization unit,
Deinterleave unit, constellation point de-mapping unit, channel decoding unit, CRC check unit and select unit, it is thus achieved that finally exporting.
When CRC check failure, send repeat requests.Wherein, deinterleave unit to be made up of K parallel deinterleaver, such as Fig. 1 institute
Show.
Compared with existing ofdm system, the present invention uses interleave unit to instead of the list of existing ofdm system at transmitting terminal
Individual interleaver and insertion pilot operation；The present invention uses at receiving terminal and deinterleaves unit, constellation point de-mapping unit, channel decoding
Unit, CRC check unit and selector unit, instead of the single deinterleaver of existing ofdm system, single constellation point solution is reflected
Penetrate, individual channel decodes, single CRC check.
The present invention is before carrying out data transmission, and sending and receiving end agreement uses the default pilot tone arrangement p of a length of d.At transmitting terminal
After constellation point, it is assumed that generate data block s of an a length of M.Assume that interleave unit uses K parallel interleaver,
The output of kth interleaver is designated as In data on d given position constitute an a length of d
Imaginary pilot tone arrangement, be designated asP Yu K imaginary pilot tone arrangement of pilot tone arrangement relatively preset one by one by selectorTherefrom chooseWherein k0Meet
In above formula,RepresentNorm,Euclidean distance for sequence of calculation a Yu sequence b.When (1) exists
Multiple solve time, optionally one of them.IfThe most directly exportIfThen will
Export after replacing with p
All data blocks of definition transmission exist the arrangement of certain imaginary pilot tone identical with presetting pilot tone arrangement (i.e.) probability beThen corresponding interleaver numbers K needs to meet
Wherein, Q represents the exponent number of constellation point, for example with Q=2 during BPSK, and Q=4 when using QPSK.In expression
Floor operation.When Q and d keeps constant, higherBigger K, i.e. more interleaver can be caused, thus raising is received and dispatched
The complexity of end.?When keeping constant, when Q or d increases, it is also desirable to bigger K, the most also will improve the complexity of sending and receiving end
Degree.
The output of interleave unit passes sequentially through subcarrier mapping unit, IFFT unit, and by inserting protection spacer units,
Wireless channel is entered after upconverting unit.
If the sequences h that channel impulse response is length L=[h1,h2,…,hL].Receiving end signal passes sequentially through down coversion list
After unit, removal protection spacer units, FFT unit, subcarrier de-mapping unit, obtain y.Y data structure on d given position
Become sequences y(d).Utilize y(d)Carry out channel estimation with p, estimate including using existing LS channel estimation and condition of sparse channel
Etc. method.Utilize channel estimation results to carry out channel equalization afterwards, obtainWillInput and be made up of K parallel deinterleaver
Deinterleaving unit, the most each deinterleaver corresponds respectively to an interleaver of transmitting terminal.Pass sequentially through K afterwards parallel
Constellation point device, channel decoder parallel for K, K parallel CRC check device.The result that CRC check is correct is selected to make
For final output, if CRC check all mistakes, send to transmitting terminal and again transmit instruction.
As a example by using 16 CRC, the Turbo chnnel coding of 1/3 code check and BPSK modulation (Q=2).Each data block warp
Cross a length of M=348 that chnnel coding is later.Sending and receiving end agreement use a length of d=6 preset pilot tone arrangement p=[1,1,1,1,
1,1].Probability is setAccording to formula (2), parallel interleaver module at least needs 147 parallel interleavers.Kth
The output of interleaver is designated asFor LS channel estimation, the prior art indicate that equally spaced leading
Frequency arrangement optimum, therefore places a frequency pilot sign every 58 data symbols, and given position is Ip=[30,88,146,204,
262,320]。At IpOn data constitute the subsequence of a length of 6, i.e. fabricate pilot tone arrangement, be designated asSelector
Relatively preset pilot tone arrangement p and 147 imaginary pilot tone arrangements one by oneTherefrom chooseOutput, wherein
k0Meet
When (3) exist multiple solve time, optionally one of them.IfThe most directly exportIfThen willExport after replacing with p
RightPass sequentially through subcarrier mapping unit, IFFT unit, and through inserting protection spacer units and up-conversion list
Wireless channel is entered after unit.If the sequences h that channel impulse response is length L=6=[h1,h2,…,h6].Receiving end signal is successively
After down-converter unit, removal protection spacer units, FFT unit, subcarrier de-mapping unit, obtain y.Y is at IpOn number
According to constituting sequences y(6).Utilize y(6)LS channel estimation is carried out with p.Channel estimation results is utilized to carry out channel afterwards equal
Weighing apparatus, obtainsWillThe deinterleaving unit that input is made up of 147 parallel deinterleavers, the most each deinterleaver is the most right
Should be in transmitting terminal a interleaver.Pass sequentially through 147 parallel constellation point devices afterwards, 147 parallel channels are translated
Code device, 147 parallel CRC check devices.The result that CRC check is correct is selected to export, if CRC check is wrong in every respect as final
By mistake, instruction is again transmitted to transmitting terminal transmission.It is right simulation result and existing pilot aided LS channel estimation to be carried out
Ratio, as in figure 2 it is shown, wherein, existing channel estimate to obtain after chnnel coding a length of 348 the I of data blockpOn position
Place pilot tone p.Visible, technical solution of the present invention can be in the case of need not pilot-frequency expense, improve the availability of frequency spectrum, it is thus achieved that
The data block error rate close with existing pilot aided LS channel estimation (Block Error Rate, BLER) property
Energy.
As it is shown on figure 3, compared for the emulation that the present invention uses LS channel estimation and condition of sparse channel to estimate further
Result.Condition of sparse channel is estimated to use orthogonal matching pursuit (Orthogonal Matching Pursuit, OMP) algorithm.Due to dilute
Dredging channel to estimate to tolerate bigger channel delay, arranging a length of L '=11 of condition of sparse channel, wherein nonzero element number is
2.Utilizing prior art is I ' to the given position of the pilot tone that condition of sparse channel is estimatedpIt is optimized, selects I 'p=[30,88,146,
204,262,320].Keep with the above remaining simulation parameter and arrange constant.As seen from Figure 5, the present invention uses condition of sparse channel to estimate
After technology, bigger channel delay can be tolerated under the default pilot tone of equal length is arranged.
Embodiment two
In embodiment one, it is noted that formula (2) needs bigger interleaver numbers.ForSituation, table 1 is given
Go out minimum parallel interleaver number K required under different default pilot length d and different modulating mode.
Minimum parallel interleaver number required under table 1, different default pilot tones arrangement length d and different modulating mode
K
Visible, along with d increases, required parallel interleaver number K increases the most rapidly.On the one hand, in multipath number relatively
Under the channel circumstance that many, channel delay is bigger, default pilot length d that the present invention is carried out required for channel estimation is bigger.Another
Aspect, in time division duplex (Time-division Duplex, TDD) system, up channel and down channel have reciprocity,
Generally using uplink channel estimation to obtain channel condition information, sent pilot tone by mobile station during uplink channel estimation, base station is carried out
Channel is estimated, therefore, it is necessary to reduce the complexity electricity with saving mobile station of mobile station, and can be parallel by reducing transmitting terminal
The number of interleaver reduces the complexity of mobile station.
This gives a kind of scheme utilizing grouped data intertexture to constitute pilot tone, transmitting terminal can be greatly decreased parallel
The number of interleaver.
As shown in Figure 4, the binary data blocks of transmitting terminal first passes through CRC (Cyclic
Redundancy Check, CRC) unit, pass sequentially through channel encoding unit, constellation point unit, packet mould afterwards
Block, G parallel parallel interleaver group, data combination module, subcarrier mapping unit, IFFT unit, insertion protection interval list
Unit and upconverting unit, be emitted into wireless channel.Packet module, G parallel parallel interleaver group, data set matched moulds
Block together constitutes the interleave unit (i.e. part in dotted line frame in Fig. 4) in the present embodiment, parallel interleaver group structure therein
As it is shown in figure 5, be made up of K parallel interleaver and a selector cascade.
The data block that receiving terminal receives passes sequentially through down-converter unit, removes protection spacer units, FFT unit, subcarrier
The parallel parallel deinterleaver group of de-mapping unit, channel estimating unit, channel equalization unit, data packet units, G, obtain
Obtain the data arrangement unit of N number of data, constellation point de-mapping unit, channel decoding unit, NCRC verification unit and a selection
Device unit, it is thus achieved that finally export.When CRC check failure, send repeat requests.Wherein, the structure of parallel deinterleaver group is such as
Shown in Fig. 6, it is made up of K parallel deinterleaver.
The present invention is before carrying out data transmission, and sending and receiving end agreement uses the default pilot tone arrangement p of a length of d, respectively by i-th
(i=1,2 ..., G) individual parallel interleaver group generates a length of d on given positioni(di> 0) and default pilot tone arrangement sub-block pi,
And meetBy splicing piObtain p=[p1p2…pG].After transmitting terminal constellation point, it is assumed that generate one
Data block s of individual a length of M, by packet module, is divided into G data sub-block s by si, i=1,2 ..., G, i.e. by spelling
Meet siAvailable s=[s1s2…sG], a length of m of each data sub-blocki, andI-th parallel interleaver group
Comprise kiIndividual parallel a length of miInterleaver, i=1,2 ..., G.Assume that G parallel interleaver group comprises altogetherIndividual interleaver.
Jth (j=1,2 ..., G) individual parallel interleaver group t (t=1,2 ..., kj) output of individual interleaver is designated asIn at djData on individual given position constitute an a length of djImaginary pilot tone arrangement sub-block, be designated asG
Fabricate pilot tone arrangement sub-block and be spliced to form an imaginary pilot tone arrangement.The selector that this parallel interleaver group comprises is the most pre-one by one
If pilot tone arrangement sub-block pjWith kjIndividual imaginary pilot tone arrangement sub-block Therefrom chooseWherein t0Full
Foot
When (4) exist multiple solve time, optionally one of them.IfThe most directly exportIfThen willReplace with pjRear outputDefine all data by jth parallel interleaver group
Sub-block exists certain imaginary pilot tone arrangement sub-block identical (i.e. with default pilot tone arrangement sub-block) probability
ForThen corresponding interleaver numbers kjNeed to meet
Wherein, Q represents the exponent number of constellation point.The transmission of the most all of data exists the arrangement of certain imaginary pilot tone with pre-
If probability identical for pilot tone arrangement p is
The output of G parallel interleaver group is spliced by data combination module, constitutes the data block of an a length of M.
Pass sequentially through subcarrier mapping unit, IFFT unit afterwards, and enter insertion protection spacer units, laggard through upconverting unit
Enter wireless channel.
If the sequences h that channel impulse response is length L=[h1,h2,…,hL].Receiving end signal passes sequentially through down coversion list
After unit, removal protection spacer units, FFT unit, subcarrier de-mapping unit, obtain y.Y data structure on d given position
Become sequences y(d).Utilize y(d)Channel estimation is carried out, including using the side such as LS channel estimation and condition of sparse channel estimation with p
Method.Utilize channel estimation results to carry out channel equalization afterwards, obtainBy packet module, willIt is divided into G data
BlockI.e. by splicingAvailableEach data sub-blockA length of mi, andRespectively willInput i-th parallel deinterleaver group, the most each parallel deinterleaver group corresponds respectively to
One parallel interleaver group of transmitting terminal.I-th parallel deinterleaver group comprises kiIndividual parallel a length of miDeinterleaver, i
=1,2 ..., G, therefore there is kiThe output that kind is different, i=1,2 ..., G.Data arrangement unit is by G parallel deinterleaver group
Output splicing, can obtain altogetherPlant data combined result.Pass sequentially through N number of parallel constellation point afterwards
Device, N number of parallel channel decoder, N number of parallel CRC check device.The result that CRC check is correct is selected to export as final,
If CRC check all mistakes, send to transmitting terminal and again transmit instruction.
As a example by using 16 CRC, the Turbo chnnel coding of 1/3 code check and BPSK modulation (Q=2).Each data block warp
Cross a length of M=348 that chnnel coding is later.Use G=2 parallel interleaver group.Sending and receiving end agreement uses a length of d=6
Preset pilot tone arrangement p=[1,1,1,1,1,1], on given position, generated a length of d by each parallel interleaver group respectively1=
d2Default pilot tone arrangement sub-block p of=31=p2=[1,1,1].An a length of M=is generated after transmitting terminal constellation point
Data block s of 348, by packet module, is divided into G=2 data sub-block s by si, i=1,2, i.e. s=[s1s2], each
The a length of m of data sub-block1=m2=174.Probability is setAccording to formula (6), arrangeAccording to
Formula (5), arranges k1=k2=23, the most each parallel interleaver group comprises the interleaver of 23 parallel a length of 174, amounts to bag
Containing K=46 interleaver.Pay particular attention to, situation about not being grouped compared to embodiment one, at identical probabilityUnder,
This embodiment reduces 101 parallel interleavers, save the parallel interleaver expense of 68.7%, significantly reduce transmitting terminal
Complexity.
For LS channel estimation, the prior art indicate that equally spaced pilot tone arrangement optimum, therefore every 58 numbers
Placing a frequency pilot sign according to symbol, given position is respectively Ip1=[30,88,146] and Ip2=[30,88,146].Jth (j
=1,2) individual parallel interleaver group t (t=1,2 ..., 23) output of individual interleaver is designated as In at 3 given positions
On data constitute one a length of 3 imaginary pilot tone arrangement sub-block, be designated as2 imaginary pilot tone arrangement sub-blocks are spliced to form
One imaginary pilot tone arrangement.Pilot tone arrangement sub-block p relatively preset one by one by the selector that this parallel interleaver group comprises1=p2=[1,
1,1] with 23 imaginary pilot tone arrangement sub-blocksTherefrom chooseWherein t0Meet
When (7) exist multiple solve time, optionally one of them.IfThe most directly exportIfThen willReplace with pjRear output
The output of 2 parallel interleaver groups is spliced by data combination module, constitutes the number of an a length of M=348
According to block.It is I that data combine later pilot frequency locationsp=[30,88,146,204,262,320].Pass sequentially through subcarrier afterwards to reflect
Penetrate unit, IFFT unit, and enter insertion protection spacer units, after upconverting unit, enter wireless channel.If channel rushes
Swash response sequences h=[h for length L=61,h2,…,h6].Receiving end signal passes sequentially through down-converter unit, removes between protection
After unit, FFT unit, subcarrier de-mapping unit, obtain y.Y is at IpOn data constitute sequences y(6).Utilize y(6)Enter with p
Row LS channel estimation.Utilize channel estimation results to carry out channel equalization afterwards, obtainBy data packet units, willIt is divided into G=2 data sub-blockI.e. by splicingAvailableEach data sub-blockLength
It is 174.Respectively willInput i-th parallel deinterleaver group, i=1,2, the most each parallel deinterleaver group correspondence respectively
A parallel interleaver group in transmitting terminal.Each parallel deinterleaver group comprises the interleaver of 23 parallel a length of 174,
Therefore there are 23 kinds of different outputs.The output of 2 parallel deinterleaver groups is spliced by data arrangement unit, can obtain altogether N=
23 × 23=529 kind data combined result.Pass sequentially through 529 parallel constellation point devices, 529 parallel channels afterwards
Decoder, 529 parallel CRC check devices.The result that CRC check is correct is selected to export, if CRC check is wrong in every respect as final
By mistake, instruction is again transmitted to transmitting terminal transmission.
Simulation comparison present invention packet and the present invention all use system BLER of LS channel estimation regardless of prescription case
Performance, as shown in Figure 7.Visible, both BLER performances are almost consistent, and use grouped data to interweave and constitute pilot tone in transmission end segment
Save the parallel interleaver expense of 68.7%, significantly reduce the complexity of transmitting terminal.
As shown in Figure 8, compared for the present invention further to be grouped scheme and use LS channel estimation and sparse letter respectively
The system BLER performance that road is estimated.Condition of sparse channel is estimated to use OMP algorithm.Owing to condition of sparse channel is estimated to tolerate bigger channel
Time delay, arranges a length of L '=11 of condition of sparse channel, and wherein nonzero element number is 2.Utilize prior art that condition of sparse channel is estimated
The given position of the pilot tone of meter is I 'pIt is optimized, selects I 'p=[16,46,77,206,269,300].Keep remaining to emulate
Parameter arranges constant.As seen from Figure 8, the present invention is grouped scheme and uses after condition of sparse channel estimation technique, pre-in equal length
If pilot tone arrangement is lower can tolerate bigger channel delay.
Claims (10)
1. the interleave unit that can generate pilot tone, it is characterised in that including:
One group of parallel interleaver, for being interleaved process respectively to input block；
One selector, the interleaving data for being exported according to each interleaver obtains the final output of interleave unit, specifically side
Method is as follows: the interleaving data being exported each interleaver, is constituted with the data of wherein fixed position and presets pilot tone arrangement
Isometric imaginary pilot tone arrangement；The intertexture that the arrangement of its imaginary pilot tone is identical with presetting pilot tone arrangement is selected from all interleavers
Device, and using the interleaving data of this interleaver as final output；Without such interleaver, then select from all interleavers
Select the arrangement of its imaginary pilot tone and preset the interleaver that pilot tone arrangement is most like, and with presetting pilot tone arrangement by the intertexture of this interleaver
Imaginary pilot tone arrangement in data exports as final after replacing.
2. as claimed in claim 1 interleave unit, it is characterised in that use Euclidean distance or standard Euclidean distance or graceful
Hatton's distance is as fabricating pilot tone arrangement and the similarity measurement preset between pilot tone arrangement, and distance is the least, and similarity is the biggest.
3. a wireless communication data dispensing device, includes successively according to the flow direction of data to be sent: CRC check position is added single
Unit, channel encoding unit, constellation point unit, interleave unit, subcarrier mapping unit, IFFT unit, protection interval are inserted
Unit, upconverting unit；It is characterized in that, described interleave unit is to generate the intertexture list of pilot tone described in claim 1 or 2
Unit.
4. wireless communication data dispensing device as claimed in claim 3, it is characterised in that the parallel friendship in described interleave unit
Knit the number K of device and meet following formula:
Wherein, Q represents the exponent number of constellation point unit,Floor operation in expression, d represents the length that default pilot tone is arranged,
For default expected probit.
5. wireless communication data receives a device, for receiving the data that device described in claim 3 or 4 sends；According to institute
Receive data the flow direction include successively: down-converter unit, protection interval removal unit, FFT unit, subcarrier de-mapping unit,
Channel estimating unit, channel equalization unit, deinterleaving unit, constellation point de-mapping unit, channel decoding unit, CRC check list
Unit, selection unit；It is characterized in that, first described channel estimating unit arranges according to described default pilot tone, reflects from subcarrier solution
The output data penetrating unit extract the pilot tone arrangement received, and then utilize the pilot tone arrangement received and described default pilot tone to arrange
Cloth carries out channel estimation；Described deinterleaving unit includes one group of parallel deinterleaver, with the interleaver in described interleave unit
One_to_one corresponding；Constellation point de-mapping unit, channel decoding unit, CRC check unit include and the solution deinterleaved in unit respectively
Interleaver one group of parallel constellation point de-mapping device, channel decoder, CRC check device one to one, each deinterleaver with
Its corresponding constellation point de-mapping device, channel decoder, CRC check device constitute a branch road；Described selection unit for from
The data selecting the branch road that CRC check is correct in each branch road export.
6. the interleave unit that can generate pilot tone, it is characterised in that including:
Packet module, for being divided into G data sub-block by input block；
G parallel parallel interleaver group, with described G data sub-block one_to_one corresponding；Each parallel interleaver group includes one group
Parallel interleaver and a selector；Described one group of parallel interleaver is for inputting its place parallel interleaver group
Data sub-block is interleaved processing respectively；Described selector is for being exported according to each interleaver in its place parallel interleaver group
Interleaving data obtain the final output of this parallel interleaver group, concrete grammar is as follows: the friendship being exported each interleaver
Organization data, is constituted the void isometric with the default pilot tone arrangement corresponding to this parallel interleaver group with the data of wherein fixed position
Structure pilot tone is arranged；The arrangement of its imaginary pilot tone and described default pilot tone is selected from all interleavers of this parallel interleaver group
The son identical interleaver of arrangement, and using the interleaving data of this interleaver as the output of place parallel interleaver group；Without
Such interleaver, then select the arrangement of its imaginary pilot tone from all interleavers of this parallel interleaver group and preset pilot tone
Arrange most like interleaver, and imaginary pilot tone in the interleaving data of this interleaver is arranged replace with presetting the arrangement of pilot tone
As the output of place parallel interleaver group after changing；The arrangement of described default pilot tone pre-sets by the following method: will preset
Pilot tone arrangement is divided into parallel interleaver group one to one G the default pilot tone arrangement parallel with described G；
Data combination module, for being combined G output of described G parallel interleaver group, obtains interleave unit
Output eventually.
7. as claimed in claim 6 interleave unit, it is characterised in that use Euclidean distance or standard Euclidean distance or graceful
Hatton's distance is as fabricating the arrangement of pilot tone and the similarity measurement preset between the arrangement of pilot tone, and distance is the least, and similarity is more
Greatly.
8. a wireless communication data dispensing device, includes successively according to the flow direction of data to be sent: CRC check position is added single
Unit, channel encoding unit, constellation point unit, interleave unit, subcarrier mapping unit, IFFT unit, protection interval are inserted
Unit, upconverting unit；It is characterized in that, described interleave unit is to generate the intertexture list of pilot tone described in claim 6 or 7
Unit.
9. wireless communication data dispensing device as claimed in claim 8, it is characterised in that in described interleave unit, jth is parallel
The number k of the interleaver in interleaver groupjMeet following formula:
Wherein, Q represents the exponent number of constellation point unit,Floor operation in expression, djRepresent that jth presets the arrangement of pilot tone
Length,For default probit, j=1,2 ..., G.
10. wireless communication data receives a device, for receiving the data that device described in claim 8 or 9 sends；Its feature
It is, includes successively according to the flow direction of received data: down-converter unit, protection interval removal unit, FFT unit, subcarrier
De-mapping unit, channel estimating unit, channel equalization unit, data packet units, deinterleaving unit, data arrangement unit, star
Seat point de-mapping unit, channel decoding unit, CRC check unit, selection unit；Described channel estimating unit is first according to described
Preset pilot tone arrangement, extract the pilot tone arrangement received from the output data of subcarrier de-mapping unit, then utilize and receive
Pilot tone arrangement and described default pilot tone arrangement carry out channel estimation；Described data packet units is for according to number in interleave unit
The data exported channel equalization unit according to the mode of grouping module are grouped；Described deinterleaving unit includes that G is individual parallel
G parallel interleaver group one_to_one corresponding in parallel deinterleaver group, with described interleave unit, each parallel deinterleaver group bag
Include and the one group of parallel deinterleaver one to one of the interleaver in corresponding parallel interleaver group；Data arrangement unit is used for will
The output of G parallel deinterleaver group is spliced, and obtainsPlant data combination, kiRepresent that i-th solves friendship parallel
Knit the deinterleaver quantity in device group；Constellation point de-mapping unit, channel decoding unit, CRC check unit include and institute respectively
State N kind data set and close the most parallel N number of constellation point de-mapping device, N number of channel decoder, N number of CRC check device, often
Plant the branch road that data combination output is constituted to its corresponding constellation point de-mapping device, channel decoder, CRC check device；Institute
State and select unit for selecting the data of the correct branch road of CRC check to export from each branch road.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838890A (en) * | 2019-10-25 | 2020-02-25 | 晶晨半导体(上海)股份有限公司 | Deinterleaving method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040196927A1 (en) * | 2003-04-02 | 2004-10-07 | Hui Jin | Extracting soft information in a block-coherent communication system |
| CN1829372A (en) * | 2005-03-01 | 2006-09-06 | 阿尔卡特公司 | Method for distributing data, a base transceiver station, a base station controller and a mobile network therefor |
| CN101112029A (en) * | 2005-02-02 | 2008-01-23 | 松下电器产业株式会社 | Radio communication system, interleave pattern control device, and interleave pattern control method |
| CN101352083A (en) * | 2005-10-27 | 2009-01-21 | 高通股份有限公司 | Method and apparatus of assigning selected interlace mode in wireless communication systems |
| CN103414677A (en) * | 2013-07-30 | 2013-11-27 | 中国民航大学 | Orthogonal frequency division multiplexing transmission method with joint orthogonal transformation interweaved with signals |
-
2016
- 2016-07-25 CN CN201610592999.2A patent/CN106230551B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040196927A1 (en) * | 2003-04-02 | 2004-10-07 | Hui Jin | Extracting soft information in a block-coherent communication system |
| CN101112029A (en) * | 2005-02-02 | 2008-01-23 | 松下电器产业株式会社 | Radio communication system, interleave pattern control device, and interleave pattern control method |
| CN1829372A (en) * | 2005-03-01 | 2006-09-06 | 阿尔卡特公司 | Method for distributing data, a base transceiver station, a base station controller and a mobile network therefor |
| CN101352083A (en) * | 2005-10-27 | 2009-01-21 | 高通股份有限公司 | Method and apparatus of assigning selected interlace mode in wireless communication systems |
| CN103414677A (en) * | 2013-07-30 | 2013-11-27 | 中国民航大学 | Orthogonal frequency division multiplexing transmission method with joint orthogonal transformation interweaved with signals |
Non-Patent Citations (2)
| Title |
|---|
| CHENHAO QI: "Joint Design of Pilot Power and Pilot Pattern for Sparse Cognitive Radio Systems", 《IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY》 * |
| 施婷婷,周世东,姚彦: "单载波频域均衡系统的一种新型导频方案", 《电子学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838890A (en) * | 2019-10-25 | 2020-02-25 | 晶晨半导体(上海)股份有限公司 | Deinterleaving method and device |
| WO2021077874A1 (en) * | 2019-10-25 | 2021-04-29 | 晶晨半导体(上海)股份有限公司 | De-interleaving method and device |
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|---|---|
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