CN110535794A - Pilot frequency transmission method, channel estimation methods, equipment and storage medium - Google Patents
Pilot frequency transmission method, channel estimation methods, equipment and storage medium Download PDFInfo
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- CN110535794A CN110535794A CN201811643597.6A CN201811643597A CN110535794A CN 110535794 A CN110535794 A CN 110535794A CN 201811643597 A CN201811643597 A CN 201811643597A CN 110535794 A CN110535794 A CN 110535794A
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- pilot
- pilot frequency
- channel estimation
- frequency sequence
- sequence
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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
-
- 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
-
- 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
Abstract
The present embodiments relate to field of communication technology, a kind of pilot frequency transmission method, channel estimation methods, equipment and storage medium are disclosed, makes it possible to reduce pilot tone collision probability, improves the accuracy of channel estimation and improve system performance.Method includes: the selection S group pilot set from M group pilot set, and selects N number of pilot frequency sequence from every group in the S group pilot set of selection, wherein the M is the positive integer greater than 2, and S is the positive integer less than the M, and the N is positive integer；The S selected is multiplied N number of pilot frequency sequence to send in data flow according to setting format insertion, is sent to receiving device.
Description
Technical field
The present embodiments relate to field of communication technology, in particular to a kind of pilot frequency transmission method, is set channel estimation methods
Standby and storage medium.
Background technique
Channel parameter estimation is to realize a key technology of wireless communication system.It can be obtained by channel parameter estimation
Detailed channel information is to measure a performance in wireless communication systems to correctly demodulate transmitting signal in receiving end
Important indicator.
Currently, channel (PUSCH) is shared for ascending physical signal, it is general to use the channel estimation methods based on frequency pilot sign.
That is, transmitting terminal by frequency pilot sign according to certain format be inserted into send data flow in, receiving end according to known format from receive number
According to the frequency pilot sign extracted in stream by channel fading and interference, the channel status at pilot frequency locations is thus estimated, and lead to
It crosses filtering interpolation and obtains the estimation of entire channel.
Inventor has found during studying the prior art: for transmitting terminal, the pilot tone of user is by basic sequence
Cyclic shift generation is carried out, after the length of pilot tone determines, receiving end carries out channel estimation using pilot tone characteristic and user separates,
To guarantee the accuracy of channel estimation, the length of pilot tone cyclic shift must just be made to be greater than the maximum multipath time delay of channel, institute
To determine when the length of pilot tone, after channel delay determines substantially, a basic sequence, the pilot tone pond that can be generated by cyclic shift is big
Small just to determine substantially, the maximum number of user that can be supported also determines that.If user or terminal quantity increase, it will generate and lead
After frequency collides, and pilot tone pond size determines, if user randomly chooses pilot tone, the collision probability between user also be will increase, thus
Decline channel estimation accuracy, influences system performance.
Summary of the invention
Embodiment of the present invention is designed to provide a kind of pilot frequency transmission method, channel estimation methods, equipment and storage
Medium makes it possible to reduce the pilot tone collision probability under multi-user or terminal scene, improves the accuracy of channel estimation and mentions
High system performance.
In order to solve the above technical problems, embodiments of the present invention provide a kind of pilot frequency transmission method, comprising: from M group
S group pilot set is selected in pilot set, and selects N number of pilot frequency sequence from every group in the S group pilot set of selection, wherein
The M is the positive integer greater than 2, and S is the positive integer less than the M, and the N is positive integer；The S selected multiplies N number of pilot frequency sequence
It is sent in data flow according to setting format insertion, is sent to receiving device.
Embodiments of the present invention additionally provide a kind of channel estimation methods, comprising: receive the number that sending ending equipment is sent
It include multiplying N number of pilot frequency sequence according to the S of setting format insertion according to stream, in the data flow, it is from M that the S, which multiplies N number of pilot frequency sequence,
It selects to obtain in S group pilot set in group pilot set, wherein select N number of pilot frequency sequence in every group of pilot set；According to institute
It states preset format and extracts the S from the data flow and multiply N number of pilot frequency sequence, and N number of pilot tone is multiplied according to the S extracted
Sequence and the data flow carry out channel estimation.
Embodiments of the present invention additionally provide a kind of electronic equipment, comprising: at least one processor；And with it is described
The memory of at least one processor communication connection；Wherein, the memory, which is stored with, to be held by least one described processor
Capable instruction, described instruction are executed by least one described processor so that at least one described processor be able to carry out it is above-mentioned
Pilot frequency transmission method.
Embodiments of the present invention additionally provide a kind of electronic equipment, comprising: at least one processor；And with it is described
The memory of at least one processor communication connection；Wherein, the memory, which is stored with, to be held by least one described processor
Capable instruction, described instruction are executed by least one described processor so that at least one described processor be able to carry out it is above-mentioned
Channel estimation methods.
Embodiments of the present invention additionally provide a kind of computer readable storage medium, are stored with computer program, described
The pilot frequency transmission method is realized when computer program is executed by processor, or realizes the channel estimation methods.
Embodiment of the present invention in terms of existing technologies, by being divided into multiple groups pilot set to a large amount of pilot frequency sequence
It closes, several groups of pilot sets is selected from multiple groups pilot set, then select pilot frequency sequence from the pilot set of selection, thus
It reduces by two users or terminal selects the probability of identical pilot tone, and then reduce collision probability.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the flow diagram of the pilot frequency transmission method of first embodiment according to the present invention；
Fig. 2 is the flow diagram of the channel estimation methods of second embodiment according to the present invention；
Fig. 3 is the detailed process schematic diagram of the channel estimation of second embodiment according to the present invention；
Fig. 4 is the structural schematic diagram of the electronic equipment of third embodiment according to the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
In order to avoid in synchronous non-orthogonal multiple access system, different sending ending equipments randomly chooses pilot tone, is easy hair
It gives birth to the problem of colliding, by being grouped to pilot frequency sequence in the embodiment of the present invention, is selected from multiple groups pilot tone every time several
Group pilot tone, chooses pilot frequency sequence from the several groups of pilot tones, the probability of identical pilot tone is selected to reduce user, to drop
Low collision probability.
A kind of pilot frequency transmission method is provided in first embodiment of the invention, is applied to sending ending equipment, such as Fig. 1 institute
Show, the specific implementation process of this method is as follows:
Step 101: S group pilot set is selected from M group pilot set, and from every group in the S group pilot set of selection
In select N number of pilot frequency sequence, wherein M is positive integer greater than 2, and S is the positive integer less than M, and N is positive integer.
Specifically, the pilot frequency sequence in one group of pilot set is to carry out cyclic shift based on the same circulation orthogonal sequence to obtain
It arrives.The corresponding circulation orthogonal sequence of difference group pilot set is identical, alternatively, the corresponding circulation orthogonal sequence of different group pilot frequency sequences
It is different.
Wherein, the minimum interval of cyclic shift is greater than the maximum multipath time delay of multipath channel.
For example, the minimum interval for carrying out cyclic shift to the same circulation orthogonal sequence is L, the value of L is not less than maximum
Channel multi-path time delay, so that receiving device can tell pilot tone different in same group of pilot set.
Wherein, circulation orthogonal sequence can be Zadoff-Chu sequence.Definition about Zadoff-Chu sequence specifically may be used
Referring to the description in 3GPP TS36.211, and will not be described here in detail.
In, the representative value of S can be set to 3.The value of N can be set to odd number.
Step 102: the S selected being multiplied into N number of pilot frequency sequence and is inserted into transmission data flow according to preset format, reception is sent to
End equipment.
Wherein, the preset format employed in pilot frequency sequence insertion data flow, it is only necessary to sending ending equipment and reception
End equipment is mutually arranged, as using which kind of format herein without limitation.
For example, it is assumed that there is K sending ending equipment, each sending ending equipment selects S group pilot tone from M group pilot set respectively
Set, and N number of pilot frequency sequence is selected from every group in corresponding S group pilot set.Assuming that K is equal to 10, M equal to 5, every group
It include 72 pilot frequency sequences in pilot set, then 10 sending ending equipments each select 2 groups from 5 groups of pilot sets, and
3 different pilot frequency sequences are selected to be inserted into the data flow of itself transmission from every group respectively.
In the embodiment of the present invention, by being divided into multiple groups pilot set to a large amount of pilot frequency sequence, from multiple groups pilot set
Several groups of pilot sets are selected, then select pilot frequency sequence from the pilot set of selection, to reduce by two users or terminal
The probability of identical pilot tone is selected, and then reduces collision probability.
Second embodiment of the invention provides a kind of channel estimation methods, is applied to receiving device, as shown in Fig. 2,
The specific implementation process of this method is as follows:
Step 201: receiving the data flow that sending ending equipment is sent, include the S being inserted into according to preset format in the data flow
Multiply N number of pilot frequency sequence, it is to select to obtain from the S group pilot set in M group pilot set which, which multiplies N number of pilot frequency sequence, wherein
N number of pilot frequency sequence is selected in every group of pilot set.
For example, it is assumed that receiving the data flow of K sending ending equipment transmission, each sending ending equipment is respectively from M group pilot tone
S group pilot set is selected in set, and selects N number of pilot frequency sequence from every group in corresponding S group pilot set, due to
Each sending ending equipment is random selection pilot tone, then it is possible that different sending ending equipments has selected the same pilot tone sequence
The case where column.If different sending ending equipments has selected the same pilot frequency sequence, referred to as pilot tone is collided.
In the embodiment, the process of channel estimation, the hair are illustrated for carrying out channel estimation to a sending ending equipment
Sending end equipment can be any one in K sending ending equipment.To other sending ending equipments in the K sending ending equipment into
Process described in process the present embodiment of row channel estimation is identical.
Step 202: extracting the S from data flow according to preset format and multiply N number of pilot frequency sequence, and should according to what is extracted
S multiplies N number of pilot frequency sequence and the data flow carries out channel estimation.
Specifically, as shown in figure 3, the detailed process of channel estimation mainly comprises the steps that
Step 301: extracting S from data flow according to preset format and multiply N number of pilot frequency sequence；
Step 302: N number of pilot frequency sequence, the pilot frequency sequence of hypothesis and the data flow being multiplied according to the S extracted and carry out letter
Road estimation, and CRC check is carried out to channel estimation results；
Step 303: judging whether CRC check passes through, if not passing through, execute step 304；If passing through, step 305 is executed；
Step 304: after the pilot frequency sequence for updating the hypothesis, re-executeing the steps 302, wherein the pilot frequency sequence of the hypothesis
Belong to the S and multiplies N number of pilot frequency sequence；
Step 305: using the channel estimation results as final channel estimation results.
Wherein, in step 302, if CRC check passes through, the data after being conducive to decoding correctly are again to transmitting terminal
Equipment carries out channel estimation；If CRC check does not pass through, N number of pilot frequency sequence is multiplied to the S of extraction and is traversed, is successively attempted
Channel estimation process, until CRC check passes through.
Specifically, after the data flow to the sending ending equipment carries out channel estimation, however, it is determined that CRC check passes through, root
Channel estimation is carried out to the sending ending equipment again according to the data after decoding；And according to channel estimation results, in data flow
In, pass through institute to the data that sending ending equipment decodes after CRC check passes through, and to the CRC check of the sending ending equipment
Corresponding pilot frequency sequence carries out interference elimination, in order to carry out channel estimation to other sending ending equipments.
In the embodiment of the present invention, by being divided into multiple groups pilot set to a large amount of pilot frequency sequence, from multiple groups pilot set
Several groups of pilot sets are selected, then select pilot frequency sequence from the pilot set of selection, have been selected to reduce by two equipment
The probability of exactly the same pilot tone, and then reduce collision probability.Also, it, can be as the case may be after determining that pilot tone, which occurs, collides
Channel estimation is carried out, system performance is further improved.
The step of various methods divide above, be intended merely to describe it is clear, when realization can be merged into a step or
Certain steps are split, multiple steps are decomposed into, as long as including identical logical relation, all in the protection scope of this patent
It is interior；To adding inessential modification in algorithm or in process or introducing inessential design, but its algorithm is not changed
Core design with process is all in the protection scope of the patent.
Third embodiment of the invention is related to a kind of electronic equipment, as shown in figure 4, the electronic equipment mainly includes at least one
A processor 401；And the memory 402 at least one processor 401 communication connection；Wherein, memory 402 stores
There is the instruction that can be executed by least one processor 401, which is executed by least one processor 401, so that this is extremely
A few processor 401 be able to carry out above first described in channel described in pilot frequency transmission method or second embodiment
Estimation method.
Wherein, memory is connected with processor using bus mode, and bus may include the bus of any number of interconnection
And bridge, bus is by one or more processors together with the various circuit connections of memory.Bus can also will be such as peripheral
Together with various other circuit connections of management circuit or the like, these are all well known in the art for equipment, voltage-stablizer
, therefore, it will not be further described herein.Processor is responsible for managing bus and common processing, can also provide
Various functions, including timing, peripheral interface, voltage adjusting, power management and other control functions.And memory can by with
Used data when storage processor is in execution operation.
Four embodiment of the invention is related to a kind of computer readable storage medium, is stored with computer program.Computer
Above method embodiment is realized when program is executed by processor.
That is, it will be understood by those skilled in the art that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, which is stored in a storage medium, including some instructions are to make
It obtains an equipment (can be single-chip microcontroller, chip etc.) or processor (processor) executes side described in each embodiment of the application
The all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of pilot frequency transmission method characterized by comprising
S group pilot set is selected from M group pilot set, and selects N number of pilot tone sequence from every group in the S group pilot set of selection
Column, wherein the M is the positive integer greater than 2, and S is the positive integer less than the M, and the N is positive integer；
The S selected is multiplied N number of pilot frequency sequence to be inserted into transmission data flow according to preset format, is sent to receiving device.
2. pilot frequency transmission method according to claim 1, which is characterized in that the pilot frequency sequence in pilot set described in one group
It is to carry out cyclic shift based on the same circulation orthogonal sequence to obtain.
3. pilot frequency transmission method according to claim 2, which is characterized in that difference organizes the corresponding circulation of the pilot set
Orthogonal sequence is identical, alternatively, different organize the corresponding circulation orthogonal sequence difference of the pilot frequency sequence.
4. pilot frequency transmission method according to claim 2, which is characterized in that the minimum interval of the cyclic shift is greater than more
The maximum multipath time delay of diameter channel.
5. a kind of channel estimation methods characterized by comprising
The data flow that sending ending equipment is sent is received, includes multiplying N number of pilot tone sequence according to the S of preset format insertion in the data flow
Column, it is to select to obtain from the S group pilot set in M group pilot set that the S, which multiplies N number of pilot frequency sequence, wherein every group of pilot set
N number of pilot frequency sequence is selected in conjunction；
The S is extracted from the data flow according to the preset format and multiplies N number of pilot frequency sequence, and according to extracting
S multiplies N number of pilot frequency sequence and the data flow carries out channel estimation.
6. channel estimation methods according to claim 5, which is characterized in that according to the preset format from the data flow
In extract the S and multiply N number of pilot frequency sequence, and N number of pilot frequency sequence is multiplied according to the S extracted and the data flow carries out
Channel estimation, comprising:
Step a extracts the S from the data flow according to the preset format and multiplies N number of pilot frequency sequence；
Step b, traverses the S and multiplies N number of pilot frequency sequence and the data flow and carry out channel estimation, and to channel estimation results into
Row CRC check, however, it is determined that CRC check does not pass through, then after the pilot frequency sequence for updating the hypothesis, re-execute the steps b, until really
Determine CRC check to pass through；
Wherein, the pilot frequency sequence of the hypothesis belongs to the S and multiplies N number of pilot frequency sequence.
7. channel estimation methods according to claim 6, which is characterized in that multiply N number of pilot tone sequence according to the S extracted
After column and the data flow carry out channel estimation, the method also includes:
If it is determined that CRC check passes through, channel estimation is carried out to the sending ending equipment again according to the data after decoding；
And according to the channel estimation results, in the data flow, to the sending ending equipment after CRC check passes through
Obtained data are decoded, and interference elimination is carried out by corresponding pilot frequency sequence to the CRC check of the sending ending equipment.
8. a kind of electronic equipment characterized by comprising
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
It manages device to execute, so that at least one described processor is able to carry out the pilot transmission side as described in any in Claims 1-4
Method.
9. a kind of electronic equipment, which is characterized in that including
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
It manages device to execute, so that at least one described processor is able to carry out the channel estimation side as described in any in claim 5 to 7
Method.
10. a kind of computer readable storage medium, is stored with computer program, which is characterized in that the computer program is located
It manages and realizes any pilot frequency transmission method in Claims 1-4 when device executes, or realize any in claim 5 to 7
The channel estimation methods.
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| CN201811643597.6A CN110535794B (en) | 2018-12-29 | 2018-12-29 | Pilot transmission method, channel estimation method, device and storage medium |
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| CN201811643597.6A CN110535794B (en) | 2018-12-29 | 2018-12-29 | Pilot transmission method, channel estimation method, device and storage medium |
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| CN110535794A true CN110535794A (en) | 2019-12-03 |
| CN110535794B CN110535794B (en) | 2022-11-11 |
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