CN108011701A - A kind of data transmission method for uplink, device and the network equipment - Google Patents
A kind of data transmission method for uplink, device and the network equipment Download PDFInfo
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- CN108011701A CN108011701A CN201610929233.9A CN201610929233A CN108011701A CN 108011701 A CN108011701 A CN 108011701A CN 201610929233 A CN201610929233 A CN 201610929233A CN 108011701 A CN108011701 A CN 108011701A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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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 present invention provides a kind of data transmission method for uplink, device and the network equipment, when first sends data with second from node from the identical running time-frequency resource of node occupancy, selected for first from node to second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, and preset condition can indicate first from node and second from the Pilot Interference between node within a preset range, therefore first first can be removed from node and second from the Pilot Interference between node when using corresponding pilot frequency sequence from node, so that second can carry out channel estimation from node according to selected pilot frequency sequence.And for selected pilot frequency sequence, first from node position of position of the pilot frequency sequence in subcarrier with pilot frequency sequence in the second subcarrier from node it is identical, and then pilot frequency sequence can be loaded in the corresponding position of the subcarrier subsequently obtained based on the subcarrier obtained before, improve processing speed.
Description
Technical field
The invention belongs to wireless mesh network technical field, more specifically, more particularly to a kind of data transmission method for uplink, dress
Put and the network equipment.
Background technology
MESH network (wireless mesh network) is developed by Ad hoc (a kind of acentric ad hoc deployed wireless networks of multi-hop)
And the wireless multi-hop network come, it is one of key technology for solving the problems, such as " last one kilometer ".
At present, difference takes different running time-frequency resources from node and sends data in MESH network so that in MESH network
It is different that between node, there is no interference or interference are smaller.But when MESH network interior joint is more and multiple nodes need to send
Data volume it is larger when, in order to lift network overall throughput, the host node in MESH network can dispatch two pairs or it is multipair from
Node takes identical video resource transceiving data, as shown in Figure 1.
In Fig. 1, under identical time slot same frequency resource, from node A to from node B send data, from node C to from
Node D sends data, and from node A to from node D and larger from node B to the path loss from node C.But due to from
Node A and from node C using identical time slot same frequency resource send data, so from node B receive from node A send
It during data, can be disturbed be subject to from node C, equally can be also subject to from section when receiving from the data that node C is sent from node D
The interference of point A, and include from node A or from the node C interference being subject to：Data are disturbed and Pilot Interference, are led when from node
Frequency when disturbing can cause that from node channel estimation can not be carried out.
The content of the invention
In view of this, it is an object of the invention to provide a kind of data transmission method for uplink, device and the network equipment, for more
It is a to use identical running time-frequency resource to be reduced when sending data from the Pilot Interference between node from node so that can be carried out from node
Channel estimation.Technical solution is as follows：
In a first aspect, the present invention provides a kind of data transmission method for uplink, the described method includes：
It is described first to be selected from node when first sends data with second from node from the identical running time-frequency resource of node occupancy
With to described second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, wherein the preset condition refers to
Show described first from node and described second from the Pilot Interference between node within a preset range, the preset range can make institute
State second and channel estimation is carried out according to selected pilot frequency sequence from node；
Position of the selected pilot frequency sequence of control in the subcarrier and pilot frequency sequence are described second from section
Position in the subcarrier of point is identical；
Described first after processing is modulated from the subcarrier of node, data to be sent is obtained and is transmitted.
Preferably, before described first after to the processing is modulated from the subcarrier of node, the method is also
Including：
Control described first from the subcarrier of node the interval of any two adjacent pilot frequencies subcarrier it is equal.
Preferably, the related sexual satisfaction selected for described first from node to described second from the pilot frequency sequence of node
The pilot frequency sequence of preset condition, including：
It is located at when described first from node and described second from node in same network, second from the pilot frequency sequence of node
For ZC sequences when, be that the described first pilot frequency sequence selected from node is identical from the root sequence numbers of the ZC sequences of node with second
But the different ZC sequences of cyclic shift value；
It is located at when described first from node and described second from node in heterogeneous networks, second is from the pilot frequency sequence of node
During ZC sequences, be the described first pilot frequency sequence selected from node be from second it is different from the root sequence numbers of the ZC sequences of node and
The different ZC sequences of cyclic shift value.
Preferably, the method further includes：Obtain matching somebody with somebody for each node in network for the broadcast of the host node in map network
The root sequence number and cyclic shift value for the ZC sequences put.
Preferably, the interval phase of any two adjacent pilot frequencies subcarrier from the subcarrier of node of control described first
Deng and the control selected by position of the pilot frequency sequence in the subcarrier and pilot frequency sequence described second from
Position in the subcarrier of node is identical, including：
The equal insertion position in multiple intervals is preset on the described first subcarrier from node, in each insertion position
Insertion Comb Pilot subcarrier is put, and the pilot frequency sequence is added in each Comb Pilot subcarrier, wherein each
The Comb Pilot subcarrier and the described second position correspondence for corresponding to from the subcarrier of node Comb Pilot subcarrier.
Preferably, the method further includes：Obtain the 3rd from node to described first send data from node when use
Pilot frequency sequence；
Channel estimation is carried out based on used pilot frequency sequence.
Preferably, it is described that channel estimation is carried out based on used pilot frequency sequence, including：
Used by acquisition in pilot frequency sequence the corresponding pilot sub carrier channel of pilot sub-carrier frequency domain response；
Frequency domain response based on each pilot sub carrier channel carries out single order line to nPilotRe point pilot tones subcarrier
Property interpolation, obtain nRe point subcarrier in frequency domain channel estimation values, and it is discrete to do nRe points to nRe point subcarrier in frequency domain channel estimation values
Inverse Fourier transform, obtains time domain channel h1, and wherein nRe is the sum of pilot sub-carrier and data subcarrier, and nPilotRe is
The sum of pilot sub-carrier；
The adding window on the basis of the cyclic shift of pilot frequency sequence, the value of the time domain channel outside window is set to 0, and is eliminated dry
Disturb the time domain channel h1 of signal；
Leaf transformation in nRe point discrete Fouriers is done to the time domain channel h1 after elimination interference signal, obtains the frequency after eliminating interference
Domain channel；
Processing is filtered to eliminating the frequency domain channel after disturbing, obtains channel estimation value.
Second aspect, the present invention also provides a kind of data sending device, described device includes：
Choose unit, for first from node with second from node occupancy identical running time-frequency resource transmission data when, for institute
First is stated to select to described second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node from node, wherein
Preset condition instruction described first from node and described second from the Pilot Interference between node within a preset range, it is described
Preset range can make described second to carry out channel estimation according to selected pilot frequency sequence from node；
Control unit, for controlling position of the selected pilot frequency sequence in the subcarrier and pilot frequency sequence to exist
Described second is identical from the position in the subcarrier of node；
Modulation unit, for being modulated to described first after processing from the subcarrier of node, obtains number to be sent
According to；
Transmitting element, for sending the data to be sent.
Preferably, described control unit, being additionally operable to control described first, any two is adjacent leads from the subcarrier of node
The interval of frequency subcarrier is equal.
Preferably, the selection unit, for being located at same net from node from node and described second when described first
In network, second from the pilot frequency sequence of node be ZC sequences when, be described first from node select pilot frequency sequence be with second from
The ZC sequences that the root sequence number of the ZC sequences of node is identical but cyclic shift value is different；And for when described first from node and
Described second is located in heterogeneous networks from node, second from the pilot frequency sequence of node be ZC sequences when, be described first from node
The pilot frequency sequence of selection is from the ZC sequences that the root sequence numbers of the ZC sequences of node is different and cyclic shift value is different from second.
Preferably, described device further includes：Acquiring unit, for obtain the broadcast of the host node in map network for network
In each node configuration ZC sequences root sequence number and cyclic shift value.
Preferably, described control unit is equal for presetting multiple intervals on the described first subcarrier from node
Insertion position, is inserted into Comb Pilot subcarrier on each insertion position, and in each Comb Pilot subcarrier
The pilot frequency sequence is added, wherein each Comb Pilot subcarrier corresponds to pectination with described second from the subcarrier of node
The position correspondence of pilot sub-carrier.
Preferably, described device further includes：Retrieval unit, for obtaining the 3rd from node to described first from node
Send the pilot frequency sequence used during data；
Channel estimating unit, for carrying out channel estimation based on used pilot frequency sequence.
Preferably, the channel estimating unit includes：
Subelement is obtained, for the corresponding pilot sub carrier channel of pilot sub-carrier in pilot frequency sequence used by obtaining
Frequency domain response；
Interpolation subelement, for the frequency domain response based on each pilot sub carrier channel to nPilotRe points pilot tone
Carrier wave carries out first-order linear interpolation, obtains nRe point subcarrier in frequency domain channel estimation values, wherein nRe is pilot sub-carrier and data
The sum of subcarrier, nPilotRe are the sum of pilot sub-carrier；
Inverse transformation subelement, for doing leaf inverse transformation in nRe point discrete Fouriers to nRe point subcarrier in frequency domain channel estimation values,
Obtain time domain channel h1；
Cyclic shift subelement, for the adding window on the basis of the cyclic shift of pilot frequency sequence, by the time domain channel outside window
Value set to 0, the time domain channel h1 for the interference signal that is eliminated；
Subelement is converted, for doing leaf transformation in nRe point discrete Fouriers to the time domain channel h1 after elimination interference signal, is obtained
Eliminate the frequency domain channel after interference；
Filtering process subelement, for being filtered processing to eliminating the frequency domain channel after disturbing, obtains channel estimation value.
The third aspect, the present invention also provides a kind of network equipment, the network equipment includes：Processor and RF device；
The processor, for when first sends data with second from node from the identical running time-frequency resource of node occupancy, being
Described first selects the pilot frequency sequence to described second from the related sexual satisfaction preset condition of the pilot frequency sequence of node, control from node
Position of the selected pilot frequency sequence of system in the subcarrier and pilot frequency sequence are described second from the subcarrier of node
In position it is identical, described first after processing is modulated from the subcarrier of node, obtains data to be sent, wherein institute
State preset condition instruction described first from node and described second from the Pilot Interference between node within a preset range, it is described pre-
If scope can make described second to carry out channel estimation according to selected pilot frequency sequence from node；
The RF device, for sending the data to be sent.
Compared with prior art, above-mentioned technical proposal provided by the invention has the following advantages that：
It was found from above-mentioned technical proposal, data are sent from the identical running time-frequency resource of node occupancy from node when first with second
When, it is first to be selected from node to second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, and it is pre-
If condition can indicate first from node and second from the Pilot Interference between node within a preset range, therefore first from node
First can be removed when using corresponding pilot frequency sequence from node and second from the Pilot Interference between node so that second from
Node can carry out channel estimation according to selected pilot frequency sequence.
And for selected pilot frequency sequence, first from node position and pilot tone of the pilot frequency sequence in subcarrier
Position of the sequence in the second subcarrier from node be identical, and then can subsequently obtained based on the subcarrier obtained before
The corresponding position loading pilot frequency sequence of subcarrier, improves processing speed.
In addition the present invention can also control first from the subcarrier of node any two adjacent pilot frequencies subcarrier interval
It is equal, thus without being inserted into pilot sub-carrier at whole positions of subcarrier, reduce pilot tone that channel estimation uses and carry
Wave number amount, realizes the effect that channel estimation is carried out based on less pilot-frequency expense.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is more schematic diagrames that data are sent from node in existing MEDH networks；
Fig. 2 is a kind of flow chart of data transmission method for uplink provided in an embodiment of the present invention；
Fig. 3 is another flow chart of data transmission method for uplink provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of subcarrier provided in an embodiment of the present invention；
Fig. 5 is another flow chart of data transmission method for uplink provided in an embodiment of the present invention；
Fig. 6 is a kind of structure diagram of data sending device provided in an embodiment of the present invention；
Fig. 7 is another structure diagram of data sending device provided in an embodiment of the present invention；
Fig. 8 is the structure diagram of channel estimating unit in data sending device provided in an embodiment of the present invention；
Fig. 9 is a kind of structure diagram of the network equipment provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without making creative work, belong to the scope of protection of the invention.
Referring to Fig. 2, it illustrates a kind of flow chart of data transmission method for uplink provided in an embodiment of the present invention, when it is multiple from
When node takes identical running time-frequency resource transmission data, by being led to multiple processing from the various subcarriers used of node to remove
Frequency disturbs.Illustrated in embodiments of the present invention by taking first from node and second from node as an example, but the embodiment of the present invention is same
Sample can be applied to two or more and take the situation of identical running time-frequency resource transmission data from node.Specifically, shown in above-mentioned Fig. 2
Data transmission method for uplink may comprise steps of：
201：It is first to be selected from node when first sends data with second from node from the identical running time-frequency resource of node occupancy
With to second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, wherein with second from the pilot tone of node
The pilot frequency sequence of the related sexual satisfaction preset condition of sequence, instruction first exist from node and second from the Pilot Interference between node
In preset range, to be reduced by the selection of pilot frequency sequence from the Pilot Interference between node so that second from node according to institute
The pilot frequency sequence of selection carries out channel estimation, i.e., in the embodiment of the present invention preset range can make second from node according to selected
Pilot frequency sequence carries out channel estimation.
And inventor by multiple pilot frequency sequences research find, between node whether there is Pilot Interference with two
The correlated results of pilot frequency sequence is related, and the correlated results of two of which pilot frequency sequence represents the correlation of two pilot frequency sequences, phase
Closing property is then used to whether there is Pilot Interference between two pilot frequency sequences of instruction, and specific correlated results is smaller, and correlation is higher,
Pilot Interference is smaller, and especially in correlated results close in the case of 0, correlation is higher, and Pilot Interference can be ignored.
Knowable to research based on inventor is found, the first pilot frequency sequence selected from node is determined in embodiments of the present invention
Whether meet that a kind of feasible pattern of preset condition is from the correlation between the pilot frequency sequence that node is selected with second：Determine
One from node select pilot frequency sequence and second from node select pilot frequency sequence between correlated results whether be 0.
Inventor also found during studying multiple pilot frequency sequences, be selected when first from node and second from node
Pilot frequency sequence when being ZC (Zadoff-Chu) sequence, two ZC sequences of selection meet the phase of two ZC sequences during following condition
Result is closed close to 0：
When first is located in consolidated network from node and second from node, it is for the first pilot frequency sequence selected from node
From second from the ZC sequences that the root sequence numbers of the ZC sequences of node is identical but cyclic shift value is different.And when first from node and the
Two from node be located in heterogeneous networks when, be that the first pilot frequency sequence selected from node is from the roots of the ZC sequences of node with second
The ZC sequences that sequence number is different and cyclic shift value is different.
Specifically：When being from the root sequence number phases of the ZC sequences of node with second for the first pilot frequency sequence selected from node
With but during the different ZC sequences of cyclic shift value, the correlated results of two ZC sequences is 0, then illustrates not deposit between two ZC sequences
In Pilot Interference；And when be that the first pilot frequency sequence selected from node is different from the root sequence numbers of the ZC sequences of node from second
And the ZC sequences that cyclic shift value is different, correlated results between two ZC sequences then illustrate between two ZC sequences close to 0
Pilot Interference can ignore, therefore the embodiment of the present invention preferably use aforesaid way come for first from node selection pilot tone sequence
Row.
And above-mentioned sequence number and cyclic shift value can be obtained from the host node in map network, i.e., the present invention is real
The data transmission method for uplink for applying example offer further includes step 200：Obtain the host node broadcast in map network to be each in network
The root sequence number and cyclic shift value of the ZC sequences of node configuration, as shown in Figure 3.
Host node wherein in map network refer to first from node and second from node each where network, such as first
From node and second from node be located in network 1 when, the host node in map network is the host node in network 1；When first from
Node is located at network 1, second from node be located at network 2 when, the host node in map network is then：Come for first from node
Say, host node is the host node in network 1, and for second from node, host node is the host node in network 2.
And the host node in network can be that (including first from node or second from section from node by each in each automatic network
Point) the root sequence number of ZC sequences and cyclic shift value are configured, such first receiving master from node and second from node
Corresponding ZC sequences can be selected after the root sequence number and cyclic shift value of node broadcasts as pilot frequency sequence.
202：The interval of any two adjacent pilot frequencies subcarrier from the subcarrier of node of control first is equal.Further control
Position position with pilot frequency sequence in second subcarrier from node of the selected pilot frequency sequence of system in subcarrier is identical.
That is, for difference is from node, pilot frequency sequence is identical from the position on node in difference, and each from
The interval of any two adjacent pilot frequencies subcarrier is equal on node, provided in an embodiment of the present invention feasible to realize this feature
Mode is as follows：
The equal insertion position in multiple intervals is preset on the first subcarrier from node, is inserted on each insertion position
Comb Pilot subcarrier, and pilot frequency sequence is added in each Comb Pilot subcarrier, wherein each Comb Pilot subcarrier with
Second corresponds to the position correspondence of Comb Pilot subcarrier from the subcarrier of node.I.e. by subcarrier of the difference from node
The equal insertion position in multiple intervals is set to be inserted into Comb Pilot subcarrier, and pilot frequency sequence is added into Comb Pilot subcarrier
Mode make it that pilot frequency sequence is identical from the position on node in difference, and each any two adjacent pilot frequencies from node
The interval of carrier wave is equal.
As shown in Figure 4 first from node and second from the schematic diagram of the subcarrier of node, and each subcarrier includes data
Carrier wave and pilot sub-carrier, and for each subcarrier, one pilot sub-carrier is set at interval of four data subcarriers,
Realize different identical from the interval of any two adjacent pilot frequencies subcarrier between node.
In embodiments of the present invention, the pilot sub-carrier shown in above-mentioned Fig. 4 uses Comb Pilot subcarrier, relative to use
For Block-type pilot subcarrier, the quantity of pilot sub-carrier is reduced, realizes and channel estimation is carried out with smaller pilot-frequency expense.And from
Above-mentioned Fig. 4 is understood, different identical from the position of the Comb Pilot subcarrier between the subcarrier of node, therefore in Comb Pilot
After pilot frequency sequence being inserted on carrier wave, it is ensured that pilot frequency sequence is identical from the position of the subcarrier of node in difference.
203：First after processing is modulated from the subcarrier of node, data to be sent is obtained and is transmitted.
It was found from above-mentioned technical proposal, data are sent from the identical running time-frequency resource of node occupancy from node when first with second
When, it is first to be selected from node to second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, and it is pre-
If condition can indicate first from node and second from the Pilot Interference between node within a preset range, therefore first from node
First can be removed when using corresponding pilot frequency sequence from node and second from the Pilot Interference between node so that second from
Node can carry out channel estimation according to selected pilot frequency sequence.
And for selected pilot frequency sequence, first from node position and pilot tone of the pilot frequency sequence in subcarrier
Position of the sequence in the second subcarrier from node be identical, and then can subsequently obtained based on the subcarrier obtained before
The corresponding position loading pilot frequency sequence of subcarrier, improves processing speed.
In addition the present invention can also control first from the subcarrier of node any two adjacent pilot frequencies subcarrier interval
It is equal, thus without being inserted into pilot sub-carrier at whole positions of subcarrier, reduce pilot tone that channel estimation uses and carry
Wave number amount, realizes the effect that channel estimation is carried out based on less pilot-frequency expense.
Referring to Fig. 5, it illustrates another flow chart of data transmission method for uplink provided in an embodiment of the present invention, in Fig. 2
On the basis of can also comprise the following steps：
204：Obtain the 3rd from node to first from node send data when the pilot frequency sequence that uses.
205：Channel estimation is carried out based on used pilot frequency sequence.
That is the step 201 of Fig. 4 to step 203 elaborate first from node as source from node to purpose from section
Point send data when process, step 204 to step 205 then elaborate first from node when as a purpose from node, other
Source is after node (the such as the 3rd from node) is sent to data, the first pilot tone that can be used from node based on other sources from node
Sequence carries out channel estimation.
The process of channel estimation provided in an embodiment of the present invention is as follows：
1) used by obtaining in pilot frequency sequence the corresponding pilot sub carrier channel of pilot sub-carrier frequency domain response.
Assuming that the relation between the pilot sub-carrier and the pilot sub-carrier of transmission that receive is：YP=XPHp+εP。
Wherein, YP=[D [k1],D[k2],…,D[kM]]T, represent the pilot sub-carrier that purpose is received from node；XP=
diag(S[k1],S[k2],…,S[kM]), the pilot sub-carrier that the source of expression is sent from node；HP=[H [k1],H[k2],…,H
[kM]]T, i-th of element representation kthiA pilot sub carrier channel；εPIn i-th of element representation kthiA pilot sub-carrier letter
The noise component(s) received on road.
Correspondingly,
For matrix
The kth that wherein i-th of element representation is estimatediThe frequency domain response of a pilot sub carrier channel.
2) frequency domain response based on each pilot sub carrier channel carries out single order to nPilotRe point pilot tones subcarrier
Linear interpolation, obtains nRe point subcarrier in frequency domain channel estimation values, then does nRe points to nRe point subcarrier in frequency domain channel estimation values
IDFT (Inverse Discrete Fourier Transform, inverse discrete Fourier transform), obtains time domain channel h1, nRe
For pilot sub-carrier and the sum of data subcarrier, nPilotRe is the sum of pilot sub-carrier.
3) adding window on the basis of the cyclic shift of pilot frequency sequence, the value of the time domain channel outside window is set to 0, is eliminated
The time domain channel h1 of interference signal, the wherein position of adding window and the cyclic shift position correspondence of ZC sequences.
4) to eliminate interference signal after time domain channel h1 be nRe points DFT (Discrete Fourier Transform,
Discrete Fourier transform), obtain the frequency domain channel after eliminating interference.
5) to eliminate disturb after frequency domain channel be filtered processing, obtain channel estimation value, wherein to frequency domain channel into
Row filtering process can further remove the interference signal in frequency domain channel, lift channel estimating performance.
For foregoing each method embodiment, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, but
It is that those skilled in the art should know, the present invention and from the limitation of described sequence of movement, because according to the present invention, certain
A little steps can use other orders or be carried out at the same time.Secondly, those skilled in the art should also know, be retouched in specification
The embodiment stated belongs to preferred embodiment, and involved action and module are not necessarily essential to the invention.
, can be with referring to Fig. 6, it illustrates a kind of structure diagram of data sending device provided in an embodiment of the present invention
Including：Choose unit 11, control unit 12, modulation unit 13 and transmitting element 14.
Choose unit 11, for first from node with second from node occupancy identical running time-frequency resource transmission data when, be
First selects the pilot frequency sequence to second from the related sexual satisfaction preset condition of the pilot frequency sequence of node from node, wherein default bar
From node and second from the Pilot Interference between node within a preset range, preset range can make second from node for part instruction first
Channel estimation is carried out according to selected pilot frequency sequence.
Inventor has found by the research to multiple pilot frequency sequences, is led between node with the presence or absence of Pilot Interference with two
The correlated results of frequency sequence is related, and the correlated results of two of which pilot frequency sequence represents the correlation of two pilot frequency sequences, related
Property then be used for indicate two pilot frequency sequences between whether there is Pilot Interference, specific correlated results is smaller, and correlation is higher, leads
Frequency disturbs smaller, and especially in correlated results close in the case of 0, correlation is higher, and Pilot Interference can be ignored.
Knowable to research based on inventor is found, the first pilot frequency sequence selected from node is determined in embodiments of the present invention
Whether meet that a kind of feasible pattern of preset condition is from the correlation between the pilot frequency sequence that node is selected with second：Determine
One from node select pilot frequency sequence and second from node select pilot frequency sequence between correlated results whether be 0.
Inventor also found during studying multiple pilot frequency sequences, be selected when first from node and second from node
Pilot frequency sequence when being ZC sequences, two ZC sequences of selection meet the correlated results of two ZC sequences during following condition close to
0：
When first is located in consolidated network from node and second from node, it is for the first pilot frequency sequence selected from node
From second from the ZC sequences that the root sequence numbers of the ZC sequences of node is identical but cyclic shift value is different.And when first from node and the
Two from node be located in heterogeneous networks when, be that the first pilot frequency sequence selected from node is from the roots of the ZC sequences of node with second
The ZC sequences that sequence number is different and cyclic shift value is different.
Specifically：When being from the root sequence number phases of the ZC sequences of node with second for the first pilot frequency sequence selected from node
With but during the different ZC sequences of cyclic shift value, the correlated results of two ZC sequences is 0, then illustrates not deposit between two ZC sequences
In Pilot Interference；And when be that the first pilot frequency sequence selected from node is different from the root sequence numbers of the ZC sequences of node from second
And the ZC sequences that cyclic shift value is different, correlated results between two ZC sequences then illustrate between two ZC sequences close to 0
Pilot Interference can ignore, therefore choose unit preferably use aforesaid way come for first from node selection pilot frequency sequence.
And above-mentioned sequence number and cyclic shift value can be obtained from the host node in map network, i.e., the present invention is real
Applying the data sending device of example offer can also include：Acquiring unit, is for obtain the broadcast of the host node in map network
The root sequence number and cyclic shift value of the ZC sequences of each node configuration in network.
Host node wherein in map network refer to first from node and second from node each where network, such as first
From node and second from node be located in network 1 when, the host node in map network is the host node in network 1；When first from
Node is located at network 1, second from node be located at network 2 when, the host node in map network is then：Come for first from node
Say, host node is the host node in network 1, and for second from node, host node is the host node in network 2.
And the host node in network can be that (including first from node or second from section from node by each in each automatic network
Point) the root sequence number of ZC sequences and cyclic shift value are configured, such first receiving master from node and second from node
Corresponding ZC sequences can be selected after the root sequence number and cyclic shift value of node broadcasts as pilot frequency sequence.
Control unit 12, for control position of the selected pilot frequency sequence in subcarrier and pilot frequency sequence second from
Position in the subcarrier of node is identical.Further control unit 12 can also control first any two from the subcarrier of node
The interval of a adjacent pilot frequencies subcarrier is equal.
That is, for difference is from node, pilot frequency sequence is identical from the position on node in difference, and each from
The interval of any two adjacent pilot frequencies subcarrier is equal on node, provided in an embodiment of the present invention feasible to realize this feature
Mode is as follows：
The equal insertion position in multiple intervals is preset on the first subcarrier from node, is inserted on each insertion position
Comb Pilot subcarrier, and pilot frequency sequence is added in each Comb Pilot subcarrier, wherein each Comb Pilot subcarrier with
Second corresponds to the position correspondence of Comb Pilot subcarrier from the subcarrier of node.I.e. by subcarrier of the difference from node
The equal insertion position in multiple intervals is set to be inserted into Comb Pilot subcarrier, and pilot frequency sequence is added into Comb Pilot subcarrier
Mode make it that pilot frequency sequence is identical from the position on node in difference, and each any two adjacent pilot frequencies from node
The interval of carrier wave is equal, specifically can be with as shown in fig.4, the embodiment of the present invention is no longer described in detail.
Modulation unit 13, for being modulated to first after processing from the subcarrier of node, obtains data to be sent.
Transmitting element 14, for sending data to be sent.
It was found from above-mentioned technical proposal, data are sent from the identical running time-frequency resource of node occupancy from node when first with second
When, it is first to be selected from node to second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, and it is pre-
If condition can indicate first from node and second from the Pilot Interference between node within a preset range, therefore first from node
First can be removed when using corresponding pilot frequency sequence from node and second from the Pilot Interference between node so that second from
Node can carry out channel estimation according to selected pilot frequency sequence.
And for selected pilot frequency sequence, first from node position and pilot tone of the pilot frequency sequence in subcarrier
Position of the sequence in the second subcarrier from node be identical, and then can subsequently obtained based on the subcarrier obtained before
The corresponding position loading pilot frequency sequence of subcarrier, improves processing speed.
In addition the present invention can also control first from the subcarrier of node any two adjacent pilot frequencies subcarrier interval
It is equal, thus without being inserted into pilot sub-carrier at whole positions of subcarrier, reduce pilot tone that channel estimation uses and carry
Wave number amount, realizes the effect that channel estimation is carried out based on less pilot-frequency expense.
Referring to Fig. 7, it illustrates another structure diagram of data sending device provided in an embodiment of the present invention,
It can also include on the basis of Fig. 6：Retrieval unit 15 and channel estimating unit 16.
Retrieval unit 15, for obtain the 3rd from node to first from node send data when the pilot tone sequence that uses
Row.
Channel estimating unit 16, for carrying out channel estimation based on used pilot frequency sequence.Wherein channel estimating unit
16 structure diagram is as shown in figure 8, can include：Obtain subelement 161, interpolation subelement 162, inverse transformation subelement 163,
Cyclic shift subelement 164, conversion subelement 165 and filtering process subelement 166.
Subelement 161 is obtained, for the corresponding pilot sub-carrier letter of pilot sub-carrier in pilot frequency sequence used by obtaining
The frequency domain response in road.
Interpolation subelement 162, leads nPilotRe point frequency domains for the frequency domain response based on each pilot sub carrier channel
Frequency subcarrier carry out first-order linear interpolation, obtain nRe point subcarrier in frequency domain channel estimation values, wherein nRe for pilot sub-carrier with
The sum of data subcarrier, nPilotRe are the sum of pilot sub-carrier.
Inverse transformation subelement 163, for doing leaf inversion in nRe point discrete Fouriers to nRe point subcarrier in frequency domain channel estimation values
Change, obtain time domain channel h1.
Cyclic shift subelement 164, for the adding window on the basis of the cyclic shift of pilot frequency sequence, the time domain outside window is believed
The value in road is set to 0, the time domain channel h1 for the interference signal that is eliminated.
Subelement 165 is converted, for doing leaf transformation in nRe point discrete Fouriers to the time domain channel h1 after elimination interference signal,
Obtain the frequency domain channel after eliminating interference.
Filtering process subelement 166, for being filtered processing to eliminating the frequency domain channel after disturbing, obtains channel estimation
Value.
In embodiments of the present invention, the specific implementation procedure of above-mentioned each subelement refers to the correlation in embodiment of the method
Illustrate, this embodiment of the present invention is not being illustrated.
Referring to Fig. 9, it illustrates the network equipment provided in an embodiment of the present invention, the network equipment includes：21 He of processor
RF device 22.
Processor 21, for when first sends data with second from node from the identical running time-frequency resource of node occupancy, for the
One selects the pilot frequency sequence to second from the related sexual satisfaction preset condition of the pilot frequency sequence of node from node, controls selected
Position of position of the pilot frequency sequence in subcarrier with pilot frequency sequence in the second subcarrier from node is identical, after processing
First is modulated from the subcarrier of node, obtains data to be sent, and wherein preset condition indicates first from node and second
From the Pilot Interference between node within a preset range, preset range can make second from node according to selected pilot frequency sequence into
Row channel estimation.
RF device 22, for sending data to be sent.
In a feasible embodiment, processor 21 can also control first from the subcarrier of node any two
The interval of adjacent pilot frequencies subcarrier is equal.Specific processor 21 control position of the selected pilot frequency sequence in subcarrier with
Position of the pilot frequency sequence in the second subcarrier from node is identical and control is controlled in the first subcarrier from node arbitrarily
The feasible pattern that the interval of two adjacent pilot frequencies subcarriers is equal is：
Processor 21 presets the equal insertion position in multiple intervals on the first subcarrier from node, in each insertion position
Insertion Comb Pilot subcarrier is put, and pilot frequency sequence is added in each Comb Pilot subcarrier, wherein each Comb Pilot
Subcarrier and the second position correspondence for corresponding to from the subcarrier of node Comb Pilot subcarrier.
In a feasible embodiment, the feasible pattern that processor 21 chooses pilot frequency sequence is：When described first from
Node and described second is located in same network from node, second from the pilot frequency sequence of node be ZC sequences when, for described the
One pilot frequency sequence selected from node is identical from the root sequence numbers of the ZC sequences of node but cyclic shift value is different from second
ZC sequences；It is located at when described first from node and described second from node in heterogeneous networks, second is from the pilot frequency sequence of node
During ZC sequences, be the described first pilot frequency sequence selected from node be from second it is different from the root sequence numbers of the ZC sequences of node and
The different ZC sequences of cyclic shift value.
The root sequence number and cyclic shift value of above-mentioned ZC sequences can be received by RF device 22, and a kind of feasible pattern is：
RF device 22 receive the root sequence numbers of the ZC sequences configured for each node in network of the host node broadcast in map network with
And cyclic shift value, and the introduction of the host node in map network see the related description in embodiment of the method.
In a feasible embodiment, processor 21 can also obtain the 3rd and send number to first from node from node
According to when the pilot frequency sequence that uses, and channel estimation is carried out based on used pilot frequency sequence.Wherein the progress of processor 21 channel is estimated
The detailed process of meter refers to the related description in embodiment of the method, and the embodiment of the present invention is not illustrating.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation is all difference with other embodiment, between each embodiment identical similar part mutually referring to.
For device class embodiment, since it is substantially similar to embodiment of the method, so description is fairly simple, related part ginseng
See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there are other identical element in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments, enables those skilled in the art to realize or use the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
The embodiments shown herein is formed on, and is to fit to consistent with the principles and novel features disclosed herein most wide
Scope.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (15)
- A kind of 1. data transmission method for uplink, it is characterised in that the described method includes：When first sends data with second from node from the identical running time-frequency resource of node occupancy, be described first from node select with Described second from the pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, wherein the preset condition indicates institute First is stated from node and described second from the Pilot Interference between node within a preset range, the preset range can make described Two carry out channel estimation from node according to selected pilot frequency sequence；Position of the selected pilot frequency sequence of control in the subcarrier and pilot frequency sequence are described second from node Position in subcarrier is identical；Described first after processing is modulated from the subcarrier of node, data to be sent is obtained and is transmitted.
- 2. according to the method described in claim 1, it is characterized in that, described first after to the processing carries from the son of node Before ripple is modulated, the method further includes：Control described first from the subcarrier of node the interval of any two adjacent pilot frequencies subcarrier it is equal.
- 3. according to the method described in claim 1, it is characterized in that, it is described for described first from node select with described second from The pilot frequency sequence of the related sexual satisfaction preset condition of the pilot frequency sequence of node, including：Be located at when described first from node and described second from node in same network, second from the pilot frequency sequence of node be ZC It is that the described first pilot frequency sequence selected from node is identical from the root sequence numbers of the ZC sequences of node but follow with second during sequence The different ZC sequences of ring shift value；Be located at when described first from node and described second from node in heterogeneous networks, second from the pilot frequency sequence of node be ZC sequences It is that the described first pilot frequency sequence selected from node is and the second and circulation different from the root sequence numbers of the ZC sequences of node during row The different ZC sequences of shift value.
- 4. according to the method described in claim 3, it is characterized in that, the method further includes：Obtain the main section in map network The root sequence number and cyclic shift value for the ZC sequences of each node configuration in network of point broadcast.
- 5. according to the method described in claim 2, it is characterized in that, the control described first is any from the subcarrier of node The pilot frequency sequence being spaced selected by equal and described control of two adjacent pilot frequencies subcarriers is in the subcarrier Position of the position with pilot frequency sequence in the described second subcarrier from node is identical, including：The equal insertion position in multiple intervals is preset on the described first subcarrier from node, on each insertion position Comb Pilot subcarrier is inserted into, and the pilot frequency sequence is added in each Comb Pilot subcarrier, wherein each described Comb Pilot subcarrier and the described second position correspondence for corresponding to from the subcarrier of node Comb Pilot subcarrier.
- 6. according to the method described in claim 1, it is characterized in that, the method further includes：The 3rd is obtained from node to described First pilot frequency sequence used when sending data from node；Channel estimation is carried out based on used pilot frequency sequence.
- 7. according to the method described in claim 6, it is characterized in that, described estimated based on used pilot frequency sequence progress channel Meter, including：Used by acquisition in pilot frequency sequence the corresponding pilot sub carrier channel of pilot sub-carrier frequency domain response；Frequency domain response based on each pilot sub carrier channel carries out first-order linear to nPilotRe point pilot tones subcarrier and inserts Value, obtains nRe point subcarrier in frequency domain channel estimation values, and nRe point subcarrier in frequency domain channel estimation values are done in nRe point discrete Fouriers Leaf inverse transformation, obtains time domain channel h1, and wherein nRe is the sum of pilot sub-carrier and data subcarrier, and nPilotRe is pilot tone The sum of subcarrier；The adding window on the basis of the cyclic shift of pilot frequency sequence, the value of the time domain channel outside window is set to 0, and be eliminated interference letter Number time domain channel h1；Leaf transformation in nRe point discrete Fouriers is done to the time domain channel h1 after elimination interference signal, obtains the frequency domain letter after eliminating interference Road；Processing is filtered to eliminating the frequency domain channel after disturbing, obtains channel estimation value.
- 8. a kind of data sending device, it is characterised in that described device includes：Choose unit, for first from node with second from node occupancys identical running time-frequency resource transmission data when, be described the One selects the pilot frequency sequence to described second from the related sexual satisfaction preset condition of the pilot frequency sequence of node from node, wherein described Preset condition instruction described first from node and described second from the Pilot Interference between node within a preset range, it is described default Scope can make described second to carry out channel estimation according to selected pilot frequency sequence from node；Control unit, for controlling position of the selected pilot frequency sequence in the subcarrier with pilot frequency sequence described Second is identical from the position in the subcarrier of node；Modulation unit, for being modulated to described first after processing from the subcarrier of node, obtains data to be sent；Transmitting element, for sending the data to be sent.
- 9. device according to claim 8, it is characterised in that described control unit, is additionally operable to control described first from section The interval of any two adjacent pilot frequencies subcarrier is equal in the subcarrier of point.
- 10. device according to claim 8, it is characterised in that the selection unit, for when described first from node and Described second is located in same network from node, second from the pilot frequency sequence of node be ZC sequences when, be described first from section The pilot frequency sequence that point is selected is from the ZC sequences that the root sequence numbers of the ZC sequences of node is identical but cyclic shift value is different from second； And for being located at when described first from node and described second from node in heterogeneous networks, second is from the pilot frequency sequence of node During ZC sequences, be the described first pilot frequency sequence selected from node be from second it is different from the root sequence numbers of the ZC sequences of node and The different ZC sequences of cyclic shift value.
- 11. device according to claim 10, it is characterised in that described device further includes：Acquiring unit, for acquisition pair Answer the root sequence number and cyclic shift value for the ZC sequences of each node configuration in network that the host node in network is broadcasted.
- 12. device according to claim 9, it is characterised in that described control unit, for described first from node The equal insertion position in multiple intervals is preset on subcarrier, Comb Pilot subcarrier is inserted on each insertion position, and The pilot frequency sequence is added in each Comb Pilot subcarrier, wherein each Comb Pilot subcarrier and described the Two correspond to the position correspondence of Comb Pilot subcarrier from the subcarrier of node.
- 13. device according to claim 8, it is characterised in that described device further includes：Retrieval unit, for obtaining Take the 3rd from node to described first from node send data when the pilot frequency sequence that uses；Channel estimating unit, for carrying out channel estimation based on used pilot frequency sequence.
- 14. device according to claim 13, it is characterised in that the channel estimating unit includes：Subelement is obtained, the frequency domain for the corresponding pilot sub carrier channel of pilot sub-carrier in pilot frequency sequence used by obtaining Response；Interpolation subelement, for the frequency domain response based on each pilot sub carrier channel to nPilotRe point pilot tone subcarriers First-order linear interpolation is carried out, obtains nRe point subcarrier in frequency domain channel estimation values, wherein nRe carries for pilot sub-carrier and data The sum of ripple, nPilotRe are the sum of pilot sub-carrier；Inverse transformation subelement, for doing leaf inverse transformation in nRe point discrete Fouriers to nRe point subcarrier in frequency domain channel estimation values, obtains Time domain channel h1；Cyclic shift subelement, for the adding window on the basis of the cyclic shift of pilot frequency sequence, by taking for the time domain channel outside window Value is set to 0, the time domain channel h1 for the interference signal that is eliminated；Subelement is converted, for doing leaf transformation in nRe point discrete Fouriers to the time domain channel h1 after elimination interference signal, is eliminated Frequency domain channel after interference；Filtering process subelement, for being filtered processing to eliminating the frequency domain channel after disturbing, obtains channel estimation value.
- 15. a kind of network equipment, it is characterised in that the network equipment includes：Processor and RF device；The processor, for being described when first sends data with second from node from the identical running time-frequency resource of node occupancy First selects the pilot frequency sequence to described second from the related sexual satisfaction preset condition of the pilot frequency sequence of node from node, controls institute Position of the pilot frequency sequence selected in the subcarrier is with pilot frequency sequence in the described second subcarrier from node Position is identical, and described first after processing is modulated from the subcarrier of node, obtains data to be sent, wherein described pre- If condition instruction described first from node and described second from the Pilot Interference between node within a preset range, the default model Enclosing can make described second to carry out channel estimation according to selected pilot frequency sequence from node；The RF device, for sending the data to be sent.
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