CN106330391B - User terminal and its PBCH detection method and device - Google Patents
User terminal and its PBCH detection method and device Download PDFInfo
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- CN106330391B CN106330391B CN201510374327.XA CN201510374327A CN106330391B CN 106330391 B CN106330391 B CN 106330391B CN 201510374327 A CN201510374327 A CN 201510374327A CN 106330391 B CN106330391 B CN 106330391B
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
- H04L1/0013—Rate matching, e.g. puncturing or repetition of code symbols
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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
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
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- Computer Networks & Wireless Communication (AREA)
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Abstract
User terminal and its PBCH detection method and device, the detection method include: to receive signal to PBCH to demodulate, and obtain equivalent channel and equivalent received signals；The first soft bit about mib information is obtained according to the equivalent channel and the equivalent received signals；According to known partial information bit in the equivalent channel, the equivalent received signals and MIB, partial information bit unknown in MIB is estimated, the estimated value about mib information is obtained；According to the estimated value, the second soft bit about mib information is obtained；Second soft bit and first soft bit are overlapped, the third soft bit about mib information is obtained；The third soft bit is decoded, MIB is solved.The scene of partial information bit in the MIB that the present invention carries PBCH known to the end UE, using partial information bit known in MIB, to help to detect unknown partial information bit.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to a kind of user terminal and its PBCH detection method and dress
It sets.
Term is explained
UE --- User Equipment --- user terminal；
PBCH --- Physical Broadcast Channel --- Physical Broadcast Channel；
MIB --- Master Information Block --- Master Information Block.
Background technique
In LTE (Long Term Evolution, long term evolution) system, UE completes cell initial search (initial
Cell search, search of initial zone) after, in order to can be carried out user data demodulation, need first to read system information.UE is first
The Master Information Block (i.e. MIB) of first read system message.MIB is carried by PBCH, and therefore, UE needs first to demodulate PBCH, could be obtained
MIB finally interprets other systems message based on the information that MIB is carried.So the demodulation of PBCH is most important to system.
As shown in Figure 1, sending and receiving block diagram for PBCH in the prior art.UE receives the PBCH of air interface transmission, successively
After demodulated --- descrambling --- solves rate-matched, then MIB solved by Viterbi decoding.
However, adopting the scheme of above-mentioned prior art, the performance of Viterbi decoding is poor.
Summary of the invention
Technical problem solved by the present invention is how user terminal mentions during carrying out detection acquisition MIB to PBCH
The accuracy of height decoding.
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of PBCH detection method, the MIB that PBCH is carried
In partial information bit be it is known, partial information bit is unknown, comprising:
It obtains PBCH and receives signal；
To the PBCH receive signal demodulate, obtain about mib information equivalent channel and about mib information etc.
Effect receives signal；
The first soft bit about mib information is obtained according to the equivalent channel and the equivalent received signals；
According to known partial information bit in the equivalent channel, the equivalent received signals and MIB, in MIB not
The partial information bit known is estimated, the estimated value about mib information is obtained；
According to the estimated value, the second soft bit about mib information is obtained；
Second soft bit and first soft bit are overlapped, the third soft bit about mib information is obtained；
The third soft bit is decoded using viterbi decoder, solves MIB.
Optionally, it is described obtained according to the equivalent channel and the equivalent received signals it is soft about the first of mib information
Bit includes:
The equivalent channel and the equivalent received signals are successively carried out with descrambling reconciliation rate-matched, is obtained about MIB
First soft bit of information.
Optionally, described according to partial information ratio known in the equivalent channel, the equivalent received signals and MIB
Spy estimates partial information bit unknown in MIB, obtain include: about the estimated value of mib information
The all possible situation for traversing partial information bit unknown in MIB, in conjunction with partial information ratio known in MIB
Spy obtains all possible situation of MIB；
Using the mathematical method of maximum likelihood, found out from all possible situation of MIB and the equivalent received signals
The situation of most likelihood, as the estimated value about mib information.
Optionally, described according to the estimated value, acquisition includes: about the second soft bit of mib information
Convolutional code processing is carried out to the estimated value and is weighted, the second soft bit about mib information is obtained.
It optionally, include 4 data blocks in the MIB that PBCH is carried, capacity is followed successively by 3 bits, 3 bits, 8 bits and 10
Bit.
Optionally, the information bit in the 3rd data block and the 4th data block is known, the 1st data block and the 2nd
Information bit in a data block is unknown.
Optionally, the information bit in the 1st data block, the 2nd data block and the 4th data block is known, the 3rd
Information bit in data block is unknown.
Optionally, the PBCH transmission block successively passes through convolutional code processing, rate-matched, scrambling and modulation in transmitting terminal.
In order to solve the above-mentioned technical problem, the embodiment of the present invention also provides a kind of PBCH detection device, what PBCH was carried
Partial information bit in MIB be it is known, partial information bit is unknown, comprising: signal acquiring unit, demodulating unit,
First soft bit unit, maximal possibility estimation unit, the second soft bit unit, third soft bit unit and decoding unit；Wherein:
Signal acquiring unit is suitable for obtaining PBCH and receives signal；
Demodulating unit demodulates suitable for receiving signal to the PBCH, obtains the equivalent channel about mib information and pass
In the equivalent received signals of mib information；
First soft bit unit is suitable for obtaining according to the equivalent channel and the equivalent received signals about mib information
The first soft bit；
Maximal possibility estimation unit is suitable for according to known portion in the equivalent channel, the equivalent received signals and MIB
Divide information bit, partial information bit unknown in MIB is estimated, the estimated value about mib information is obtained；
Second soft bit unit is suitable for obtaining the second soft bit about mib information according to the estimated value；
Third soft bit unit, suitable for second soft bit and first soft bit are overlapped, obtain about
The third soft bit of mib information；
Decoding unit solves MIB suitable for decoding using viterbi decoder to the third soft bit.
Optionally, it is described obtained according to the equivalent channel and the equivalent received signals it is soft about the first of mib information
Bit includes:
The equivalent channel and the equivalent received signals are successively carried out with descrambling reconciliation rate-matched, is obtained about MIB
First soft bit of information.
Optionally, described according to partial information ratio known in the equivalent channel, the equivalent received signals and MIB
Spy estimates partial information bit unknown in MIB, obtain include: about the estimated value of mib information
The all possible situation for traversing partial information bit unknown in MIB, in conjunction with partial information ratio known in MIB
Spy obtains all possible situation of MIB；
Using the mathematical method of maximum likelihood, found out from all possible situation of MIB and the equivalent received signals
The situation of most likelihood, as the estimated value about mib information.
Optionally, described according to the estimated value, acquisition includes: about the second soft bit of mib information
Convolutional code processing is carried out to the estimated value and is weighted, the second soft bit about mib information is obtained.
It optionally, include 4 data blocks in the MIB that PBCH is carried, capacity is followed successively by 3 bits, 3 bits, 8 bits and 10
Bit.
Optionally, the information bit in the 3rd data block and the 4th data block is known, the 1st data block and the 2nd
Information bit in a data block is unknown.
Optionally, the information bit in the 1st data block, the 2nd data block and the 4th data block is known, the 3rd
Information bit in data block is unknown.
Optionally, the PBCH transmission block successively passes through convolutional code processing, rate-matched, scrambling and modulation in transmitting terminal.
In order to solve the above-mentioned technical problem, the embodiment of the present invention also provides a kind of user terminal, including above-mentioned PBCH detection
Device.
Optionally, the user terminal is smart phone.
Compared with prior art, technical solution of the present invention has the advantages that
The scene of partial information bit in the MIB carried for PBCH known to the end UE is obtained carrying out detection to PBCH
During obtaining MIB, using partial information bit known in MIB, to help to detect unknown partial information bit, to mention
The accuracy of high Viterbi decoding.
Further, all possible situation for traversing partial information bit unknown in MIB, in conjunction with known in MIB
Partial information bit obtains all possible situation of MIB；Using the mathematical method of maximum likelihood, from all possible of MIB
It is found out in situation and utilizes maximum likelihood as the estimated value about mib information with the situation of the equivalent received signals most likelihood
Mathematical method obtain the estimated value about mib information, it is subsequent and then obtain the second soft bit, and with direct descrambling reconciliation speed
Viterbi decoder is inputted after the first soft bit superposition that rate matches, to improve the accuracy of Viterbi decoding.
Detailed description of the invention
Fig. 1 sends and receives block diagram for PBCH's in the prior art；
Fig. 2 is that PBCH sends and receives block diagram in the embodiment of the present invention；
Fig. 3 is PBCH detection method flow chart in the embodiment of the present invention；
Fig. 4 is mib structure block diagram；
Fig. 5 is PBCH structure of the detecting device block diagram in the embodiment of the present invention.
Specific embodiment
According to the analysis of background technology part it is found that the prior art examines PBCH by the way of Viterbi decoding
It surveys, solves MIB.But the performance of Viterbi decoding is poor.
Inventor has found after studying: under some special scenes, for example, eNodeB (i.e. evolved Node B,
Base station under LTE system) system information updates and cell switching, and PRACH (Physical Random Access
Channel, Physical Random Access Channel) period less than 10ms scene under, the partial information bit in the MIB that PBCH is carried
It is known.
Inventor proposes: the end UE can use known partial information bit in MIB, to help to detect unknown part letter
Bit is ceased, to improve the accuracy of Viterbi decoding.The prior art to PBCH carry out detection obtain MIB during, and
Underuse known partial information bit in MIB.
As shown in Fig. 2, sending and receiving block diagram for PBCH of the present invention.The end UE utilizes known partial information ratio in MIB
Spy is used as prior information, using the mathematical method of maximum likelihood, obtains the second soft bit after convolutional code is handled, and with directly solution
Viterbi decoder is inputted after disturbing the first soft bit superposition that reconciliation rate-matched obtains.
To more fully understand those skilled in the art and realizing the present invention, referring to the drawings, pass through specific embodiment
It is described in detail.
Embodiment one
As described below, the embodiment of the present invention provides a kind of PBCH detection method.
The scene of partial information bit of the present embodiment suitable for the MIB that PBCH known to the end UE is carried, these scenes
Including but not limited to eNodeB system information updates and cell switches, and the PRACH period is less than 10ms.
Referring to PBCH detection method flow chart shown in Fig. 3, it is described in detail below by way of specific steps:
S301 obtains PBCH and receives signal.
PBCH transmission block is successively sent after convolutional code processing, rate-matched, scrambling and modulation in transmitting terminal.
The end UE obtains the PBCH transmission block of air interface transmission as receiving end, carries mib information in PBCH transmission block.
S302 receives signal to the PBCH and demodulates, and obtains about the equivalent channel of mib information and believes about MIB
The equivalent received signals of breath.
The equivalent channel obtained after foundation equalizing demodulation and the equivalent received signals are obtained in subsequent step
The first soft bit and the second soft bit about mib information.
S303 obtains the first soft bit about mib information according to the equivalent channel and the equivalent received signals.
Specifically, descrambling reconciliation rate-matched can be successively carried out to equivalent channel and the equivalent received signals, obtained
The first soft bit about mib information.
S304, according to known partial information bit in the equivalent channel, the equivalent received signals and MIB, to MIB
In unknown partial information bit estimated, obtain the estimated value about mib information.
As shown in figure 4, including 4 data blocks in MIB, capacity is followed successively by 3 bits, 3 bits, 8 bits and 10 bits.
As previously mentioned, the PBCH detection method in the present embodiment, the portion suitable for the MIB that PBCH known to the end UE is carried
Divide the scene of information bit.
Partial information bit in the MIB that PBCH known to the end UE is carried can be there are two types of situation: the 3rd data block and the
4 data blocks are it is known that known to either the 1st data block, the 2nd data block and the 4th data block.
In specific implementation, described to believe according to part known in the equivalent channel, the equivalent received signals and MIB
Cease bit, partial information bit unknown in MIB is estimated, obtain include: about the estimated value of mib information
The all possible situation for traversing partial information bit unknown in MIB, in conjunction with partial information ratio known in MIB
Spy obtains all possible situation of MIB；
Using the mathematical method of maximum likelihood, found out from all possible situation of MIB and the equivalent received signals
The situation of most likelihood, as the estimated value about mib information.
For known to the 1st data block, the 2nd data block and the 4th data block in MIB, the 3rd number in MIB is traversed
According to all possible situation (i.e. all possible situation of unknown partial information bit in traversal MIB) of block, there is 28=256
Kind is possible, and the 1st data block, the 2nd data block in conjunction with known in MIB and the 4th data block obtain 256 kinds of possibility of MIB
Situation.Using the mathematical method of maximum likelihood, found out and the equivalent received signals from this 256 kinds of possible situations of MIB
The situation of most likelihood, as the estimated value about mib information.
By above to the description of technical solution it can be seen that traversing partial information ratio unknown in MIB in the present embodiment
Special all possible situation obtains all possible situation of MIB in conjunction with partial information bit known in MIB；Using most
The mathematical method of maximum-likelihood finds out the situation with the equivalent received signals most likelihood from all possible situation of MIB, makees
For the estimated value about mib information, obtain the estimated value about mib information using the mathematical method of maximum likelihood, it is subsequent into
And the second soft bit is obtained, and input Viterbi decoding after being superimposed with the first soft bit that direct descrambling reconciliation rate-matched obtains
Device, to improve the accuracy of Viterbi decoding.
It is understood that step S303 and step S304 are carried out respectively, not no inevitable successive pass between the two
System.
S305 obtains the second soft bit about mib information according to the estimated value.
Specifically, convolutional code processing is carried out to the estimated value and after * (multiplies) weight, obtains second about mib information
Soft bit.
Second soft bit and first soft bit are overlapped by S306, are obtained soft about the third of mib information
Bit.
The third soft bit input viterbi decoder obtained after superposition.
S307 decodes the third soft bit using viterbi decoder, solves MIB.
Using PBCH detection method provided by the present embodiment, the accuracy of the MIB finally solved has compared with prior art
It is obviously improved.
By above to the description of technical solution it can be seen that being carried in the present embodiment for PBCH known to the end UE
The scene of partial information bit in MIB utilizes part known in MIB during carrying out detection acquisition MIB to PBCH
Information bit, specifically, can be with to improve the accuracy of Viterbi decoding to help to detect unknown partial information bit
Obtain the gain of 3~5dB.
Embodiment two
As described below, the embodiment of the present invention provides a kind of PBCH detection device.
The scene of partial information bit of the present embodiment suitable for the MIB that PBCH known to the end UE is carried, these scenes
Including but not limited to eNodeB system information updates and cell switches, and the PRACH period is less than 10ms.
PBCH structure of the detecting device block diagram referring to Figure 5.
The PBCH detection device includes: signal acquiring unit 501, demodulating unit 502, the first soft bit unit 503, most
Maximum-likelihood estimation unit 504, the second soft bit unit 505, third soft bit unit 506 and decoding unit 507；Wherein each unit
Major function it is as follows:
Signal acquiring unit 501 is suitable for obtaining PBCH and receives signal；
Demodulating unit 502 demodulates suitable for receiving signal to the PBCH, obtains the equivalent channel about mib information
With the equivalent received signals about mib information；
First soft bit unit 503 is suitable for obtaining according to the equivalent channel and the equivalent received signals and believe about MIB
First soft bit of breath；
Maximal possibility estimation unit 504 is suitable for according to known in the equivalent channel, the equivalent received signals and MIB
Partial information bit, partial information bit unknown in MIB is estimated, the estimated value about mib information is obtained；
Second soft bit unit 505 is suitable for obtaining the second soft bit about mib information according to the estimated value；
Third soft bit unit 506 is closed suitable for second soft bit and first soft bit to be overlapped
In the third soft bit of mib information；
Decoding unit 507 solves MIB suitable for decoding using viterbi decoder to the third soft bit.
By above to the description of technical solution it can be seen that being carried in the present embodiment for PBCH known to the end UE
The scene of partial information bit in MIB utilizes part known in MIB during carrying out detection acquisition MIB to PBCH
Information bit, to help to detect unknown partial information bit, to improve the accuracy of Viterbi decoding.
In specific implementation, described to obtain according to the equivalent channel and the equivalent received signals about mib information
First soft bit includes:
The equivalent channel and the equivalent received signals are successively carried out with descrambling reconciliation rate-matched, is obtained about MIB
First soft bit of information.
In specific implementation, described to believe according to part known in the equivalent channel, the equivalent received signals and MIB
Cease bit, partial information bit unknown in MIB is estimated, obtain include: about the estimated value of mib information
The all possible situation for traversing partial information bit unknown in MIB, in conjunction with partial information ratio known in MIB
Spy obtains all possible situation of MIB；
Using the mathematical method of maximum likelihood, found out from all possible situation of MIB and the equivalent received signals
The situation of most likelihood, as the estimated value about mib information.
By above to the description of technical solution it can be seen that traversing partial information ratio unknown in MIB in the present embodiment
Special all possible situation obtains all possible situation of MIB in conjunction with partial information bit known in MIB；Using most
The mathematical method of maximum-likelihood finds out the situation with the equivalent received signals most likelihood from all possible situation of MIB, makees
For the estimated value about mib information, obtain the estimated value about mib information using the mathematical method of maximum likelihood, it is subsequent into
And the second soft bit is obtained, and input Viterbi decoding after being superimposed with the first soft bit that direct descrambling reconciliation rate-matched obtains
Device, to improve the accuracy of Viterbi decoding.
In specific implementation, it states according to the estimated value, acquisition includes: about the second soft bit of mib information
Convolutional code processing is carried out to the estimated value and is weighted, the second soft bit about mib information is obtained.
It in specific implementation, include 4 data blocks in the MIB that PBCH is carried, capacity is followed successively by 3 bits, 3 bits, 8 ratios
Special and 10 bits.
In specific implementation, the information bit in the 3rd data block and the 4th data block is known, the 1st data block
It is unknown with the information bit in the 2nd data block；Either, the 1st data block, the 2nd data block and the 4th data block
In information bit be it is known, the information bit in the 3rd data block is unknown.
In specific implementation, the PBCH transmission block transmitting terminal successively pass through convolutional code processing, rate-matched, scrambling and
Modulation.
Embodiment three
As described below, the embodiment of the present invention provides a kind of user terminal.
The difference is that, which includes the inspection of the PBCH as provided in the embodiment of the present invention with the prior art
Survey device.The scene for the partial information bit in MIB that thus user terminal carries PBCH known to the end UE, right
During PBCH carries out detection acquisition MIB, using partial information bit known in MIB, to help to detect unknown part
Information bit, to improve the accuracy of Viterbi decoding.
In specific implementation, the user terminal can be smart phone.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (18)
1. a kind of PBCH detection method, which is characterized in that the partial information bit in the MIB that PBCH is carried is known, portion
It is unknown for dividing information bit, comprising:
It obtains PBCH and receives signal；
Signal is received to the PBCH to demodulate, and obtains about the equivalent channel of mib information and is connect about the equivalent of mib information
The collection of letters number；
The first soft bit about mib information is obtained according to the equivalent channel and the equivalent received signals；
According to known partial information bit in the equivalent channel, the equivalent received signals and MIB, to unknown in MIB
Partial information bit is estimated, the estimated value about mib information is obtained；
According to the estimated value, the second soft bit about mib information is obtained；
Second soft bit and first soft bit are overlapped, the third soft bit about mib information is obtained；
The third soft bit is decoded using viterbi decoder, solves MIB.
2. PBCH detection method as described in claim 1, which is characterized in that described according to the equivalent channel and described equivalent
It receives signal and obtains and include: about the first soft bit of mib information
The equivalent channel and the equivalent received signals are successively carried out with descrambling reconciliation rate-matched, is obtained about mib information
The first soft bit.
3. PBCH detection method as described in claim 1, which is characterized in that it is described according to the equivalent channel, it is described equivalent
Receive known partial information bit in signal and MIB, partial information bit unknown in MIB estimated, obtain about
The estimated value of mib information includes:
The all possible situation for traversing unknown partial information bit in MIB, in conjunction with partial information bit known in MIB,
Obtain all possible situation of MIB；
Using the mathematical method of maximum likelihood, found out from all possible situation of MIB with the equivalent received signals most seemingly
Right situation, as the estimated value about mib information.
4. PBCH detection method as described in claim 1, which is characterized in that it is described according to the estimated value, it obtains about MIB
Second soft bit of information includes:
Convolutional code processing is carried out to the estimated value and is weighted, the second soft bit about mib information is obtained.
5. PBCH detection method as described in claim 1, which is characterized in that include 4 data in the MIB that PBCH is carried
Block, capacity are followed successively by 3 bits, 3 bits, 8 bits and 10 bits.
6. PBCH detection method as claimed in claim 5, which is characterized in that the letter in the 3rd data block and the 4th data block
Breath bit be it is known, the information bit in the 1st data block and the 2nd data block is unknown.
7. PBCH detection method as claimed in claim 5, which is characterized in that the 1st data block, the 2nd data block and the 4th
Information bit in data block be it is known, the information bit in the 3rd data block is unknown.
8. PBCH detection method as described in claim 1, which is characterized in that PBCH transmission block successively passes through convolution in transmitting terminal
Code processing, rate-matched, scrambling and modulation.
9. a kind of PBCH detection device, which is characterized in that the partial information bit in the MIB that PBCH is carried is known, portion
It is unknown for dividing information bit, comprising: signal acquiring unit, demodulating unit, the first soft bit unit, maximal possibility estimation list
Member, the second soft bit unit, third soft bit unit and decoding unit；Wherein:
Signal acquiring unit is suitable for obtaining PBCH and receives signal；
Demodulating unit, suitable for the PBCH receive signal demodulate, obtain about mib information equivalent channel and about
The equivalent received signals of mib information；
First soft bit unit, suitable for obtaining the about mib information according to the equivalent channel and the equivalent received signals
One soft bit；
Maximal possibility estimation unit is suitable for believing according to part known in the equivalent channel, the equivalent received signals and MIB
Bit is ceased, partial information bit unknown in MIB is estimated, the estimated value about mib information is obtained；
Second soft bit unit is suitable for obtaining the second soft bit about mib information according to the estimated value；
Third soft bit unit obtains and believes about MIB suitable for second soft bit and first soft bit to be overlapped
The third soft bit of breath；
Decoding unit solves MIB suitable for decoding using viterbi decoder to the third soft bit.
10. PBCH detection device as claimed in claim 9, which is characterized in that described according to the equivalent channel and described etc.
Effect receives signal and obtains
The equivalent channel and the equivalent received signals are successively carried out with descrambling reconciliation rate-matched, is obtained about mib information
The first soft bit.
11. PBCH detection device as claimed in claim 9, which is characterized in that it is described according to the equivalent channel, it is described equivalent
Receive known partial information bit in signal and MIB, partial information bit unknown in MIB estimated, obtain about
The estimated value of mib information includes:
The all possible situation for traversing unknown partial information bit in MIB, in conjunction with partial information bit known in MIB,
Obtain all possible situation of MIB；
Using the mathematical method of maximum likelihood, found out from all possible situation of MIB with the equivalent received signals most seemingly
Right situation, as the estimated value about mib information.
12. PBCH detection device as claimed in claim 9, which is characterized in that it is described according to the estimated value, obtain about
Second soft bit of mib information includes:
Convolutional code processing is carried out to the estimated value and is weighted, the second soft bit about mib information is obtained.
13. PBCH detection device as claimed in claim 9, which is characterized in that include 4 data in the MIB that PBCH is carried
Block, capacity are followed successively by 3 bits, 3 bits, 8 bits and 10 bits.
14. PBCH detection device as claimed in claim 13, which is characterized in that in the 3rd data block and the 4th data block
Information bit be it is known, the information bit in the 1st data block and the 2nd data block is unknown.
15. PBCH detection device as claimed in claim 13, which is characterized in that the 1st data block, the 2nd data block and the 4th
Information bit in a data block be it is known, the information bit in the 3rd data block is unknown.
16. PBCH detection device as claimed in claim 9, which is characterized in that PBCH transmission block is in transmitting terminal successively through pulleying
Product code processing, rate-matched, scrambling and modulation.
17. a kind of user terminal, which is characterized in that including the PBCH detection device as described in any one of claim 9 to 16.
18. user terminal as claimed in claim 17, which is characterized in that the user terminal is smart phone.
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| CN108933641B (en) | 2017-05-22 | 2022-10-11 | 中兴通讯股份有限公司 | Data sending and processing method and device, network side equipment and terminal |
| US10560910B2 (en) * | 2017-06-12 | 2020-02-11 | Qualcomm Incoporated | Synchronization signal for a broadcast channel |
| JP7108027B2 (en) * | 2018-05-10 | 2022-07-27 | 株式会社Ｎｔｔドコモ | Terminal, wireless communication method, base station and system |
| CN110890940B (en) * | 2019-11-25 | 2022-04-12 | 展讯通信（上海）有限公司 | Method and device for decoding MIB carried by PBCH, storage medium and terminal |
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