CN108075807A - A kind of detection method and device of cell ID - Google Patents
A kind of detection method and device of cell ID Download PDFInfo
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- CN108075807A CN108075807A CN201611040747.5A CN201611040747A CN108075807A CN 108075807 A CN108075807 A CN 108075807A CN 201611040747 A CN201611040747 A CN 201611040747A CN 108075807 A CN108075807 A CN 108075807A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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Abstract
The present invention provides a kind of detection method and device of cell ID, is related to field of communication technology, to improve the detection speed of cell ID in narrowband systems.The detection method of the cell ID of the present invention includes：SSS frequency-region signals are obtained according to the secondary synchronization signal SSS time-domain signals of present frame；The difference correlated series of the present frame is obtained according to the SSS frequency-region signals；Scrambler compensation is carried out to the difference correlated series, obtains the difference correlated series after scrambler compensation；Difference correlated series after being compensated according to the scrambler obtains time-domain difference correlated series；The peak-peak in the time-domain difference correlated series is obtained, and cell ID is determined according to the peak-peak.Present invention is mainly used in narrow-band communication system.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of detection method and device of cell ID.
Background technology
The synchronizing signal of wireless communication system is broadly divided into PSS PSS, and (Primary Synchronous Signal, master are same
Walk signal) signal and SSS SSS (Secondary Synchronous Signal, secondary synchronization signal) signal.Wherein, PSS believes
Number it is mainly used for timing and Frequency Synchronization, SSS signals is mainly used for the detection of cell ID (Identification is identified).
It is required for carrying out cell ID detections in a wireless communication system.The synchronizing signal of wireless communication system is mainly using perseverance
Envelope zero auto-correlation sequence, also referred to as CAZAC sequences.Commonly used CAZAC sequences mainly include Zadoff-off sequences
(i.e. ZC sequences), Frank sequences, Golomb multiphase sequences and Chirp sequences.
Traditional cell ID detection methods are detected using ML (Maximum Likelihood, maximum likelihood), that is, are traveled through
All known cell ID, the corresponding cell ID of maximal correlation is found by calculating correlation.
SSS synchronizing signal principal modes for detecting cell ID are：Sq,f,u(n)=Aq(n)Bf(n)Cu(n)。
Wherein Cu(n) it is core sequence, that is, CAZAC sequences, group number u and cell id q collectively constitute cell ID information, and f is represented
Frame number.
With NB-IOT (Narrow Band Internet of Things, based on cellular narrowband Internet of Things) narrowband systems
Exemplified by, the SSS signals for cell ID detections are：
It is corresponding, in above formula：
Aq(n)=bq(m),bq(m) it is 4 groups of preset scramble sequences.
θfTotally 4 values.
For ZC sequences,U totally 126 values.
Cell ID：
It can be seen that the SSS signals one of NB-IOT systems share 4 × 4 × 126=2106 groups possibility.
So, according to above-mentioned NB-IOT systems SSS signals 2016 kinds of possibility, utilize existing cell ID detection methods
2016 traversals are carried out, it is necessary to carry out substantial amounts of traversal search calculating.With the increase of cell ID numbers, above-mentioned detection cell ID
Method will become complicated, cell ID detection speeds are slower.
The content of the invention
In view of this, the present invention provides a kind of detection method and device of cell ID, small to be improved in narrowband systems
The detection speed of area ID.
In order to solve the above technical problems, the present invention provides a kind of detection method of cell ID, including：
SSS frequency-region signals are obtained according to the secondary synchronization signal SSS time-domain signals of present frame；
The difference correlated series of the present frame is obtained according to the SSS frequency-region signals；
Scrambler compensation is carried out to the difference correlated series, obtains the difference correlated series after scrambler compensation；
Difference correlated series after being compensated according to the scrambler obtains time-domain difference correlated series；
The peak-peak in the time-domain difference correlated series is obtained, and cell ID is determined according to the peak-peak.
Wherein, described the step of SSS frequency-region signals are obtained according to the secondary synchronization signal SSS time-domain signals of present frame, including：
Fast Fourier Transform (FFT) is carried out to the SSS time-domain signals of the present frame, obtains the SSS frequency-region signals.
Wherein, it is described that scrambler compensation is carried out to the difference correlated series, obtain the difference correlated series after scrambler compensation
The step of, including：
The difference correlated series is multiplied respectively with default 4 groups of difference scrambler sequences, after obtaining 4 groups of scrambler compensation
Difference correlated series.
Wherein, the step of difference correlated series after the compensation according to the scrambler, acquisition time-domain difference correlated series,
Specially：
Difference correlated series after compensating the scrambler carries out inverse Fourier transform, obtains the time-domain difference correlation sequence
Row.
Wherein, the peak-peak obtained in the time-domain difference correlated series, and determined according to the peak-peak
The step of cell ID, including：
Obtain the corresponding group number of the peak-peak and cell id；
Cell ID is determined according to the group number and the cell id.
Wherein, described the step of obtaining the corresponding group number of the peak-peak and cell id before, the method further includes：
Determine whether the peak-peak is greater than or equal to predetermined threshold value；
Described the step of obtaining the corresponding group number of the peak-peak and cell id, it is specially：
If the peak-peak is greater than or equal to predetermined threshold value, the corresponding group number of the peak-peak and cell id are obtained.
Wherein, before the step of difference correlated series for the present frame being obtained according to the SSS frequency-region signals described, institute
The method of stating further includes：
Channel estimation is carried out to primary synchronization signal PSS frequency-region signals, obtains channel estimation value；
Frequency domain equalization is carried out to the SSS frequency-region signals using the channel estimation value, obtains the SSS frequencies after frequency domain equalization
Domain signal；
It is described the present frame is obtained according to the SSS frequency-region signals difference correlated series the step of, be specially：
According to the SSS frequency-region signals after the frequency domain equalization, the difference correlated series of the present frame is obtained.
Wherein, the method further includes：According to multiple cell IDs of acquisition, determine whether cell detection succeeds.
Wherein, multiple cell IDs according to acquisition, determine the whether successful step of cell detection, including：
When cell ID identical in the multiple cell ID number be more than preset value when, determine cell detection into
Work(.
Second aspect, the present invention provide a kind of detection device of cell ID, including：
Signal processing module, for obtaining SSS frequency-region signals according to the secondary synchronization signal SSS time-domain signals of present frame；
Difference block, for obtaining the difference correlated series of the present frame according to the SSS frequency-region signals；
Scrambler compensating module for carrying out scrambler compensation to the difference correlated series, obtains the difference after scrambler compensation
Correlated series；
Series processing module, for according to the difference correlated series after scrambler compensation, obtaining time-domain difference correlation sequence
Row；
Cell ID acquisition module, for obtaining the peak-peak in the time-domain difference correlated series, and according to described
Peak-peak determines cell ID.
Wherein, the signal processing module is specifically used for, and fast Fourier is carried out to the SSS time-domain signals of the present frame
Conversion, obtains the SSS frequency-region signals.
Wherein, the scrambler compensating module is specifically used for, and the difference correlated series is disturbed respectively with default 4 groups of difference
Code sequence is multiplied, and obtains the difference correlated series after 4 groups of scrambler compensation.
Wherein, the series processing module is specifically used for, and the difference correlated series after compensating the scrambler is carried out in Fu
Leaf inverse transformation obtains the time-domain difference correlated series.
Wherein, the cell ID acquisition module includes：
First acquisition submodule, for obtaining the corresponding group number of the peak-peak and cell id；
Determination sub-module is identified, for determining cell ID according to the group number and the cell id.
Wherein, the cell ID acquisition module, further includes：
Judging submodule, for determining whether the peak-peak is greater than or equal to predetermined threshold value；
First acquisition submodule is specifically used for, if the peak-peak is greater than or equal to predetermined threshold value, described in acquisition
The corresponding group number of peak-peak and cell id.
Wherein, described device further includes：
Channel estimation module for carrying out channel estimation to primary synchronization signal PSS frequency-region signals, obtains channel estimation value；
Frequency domain equalization module for carrying out frequency domain equalization to the SSS frequency-region signals using the channel estimation value, obtains
SSS frequency-region signals after frequency domain equalization；
The difference block is specifically used for：According to the SSS frequency-region signals after the frequency domain equalization, the present frame is obtained
Difference correlated series.
Wherein, described device further includes：
Cell detection module for multiple cell IDs according to acquisition, determines whether cell detection succeeds.
Wherein, the cell detection module is specifically used for：As of cell ID identical in the multiple cell ID
When number is more than preset value, cell detection success is determined.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
In embodiments of the present invention, SSS frequency-region signals are obtained by the SSS time-domain signals of acquisition, and obtains corresponding difference
Divide correlated series.After carrying out scrambler compensation to the difference correlated series, when obtaining time-domain difference correlated series, and then obtaining described
Peak-peak in the difference correlated series of domain, determines cell ID.It therefore, in embodiments of the present invention, need not be to possible
Cell ID carries out traversal search detection, without the concern for possible cell ID number, passes through simple difference correlation computations
Cell ID can be obtained with conversion, operand and complexity is greatly reduced, substantially increases detection speed.
Description of the drawings
Fig. 1 is the flow chart of the detection method of the cell ID of the embodiment of the present invention one；
Fig. 2 is the flow chart of the detection method of the cell ID of the embodiment of the present invention two；
Fig. 3 is the processing schematic diagram of the embodiment of the present invention two；
Fig. 4 is the schematic diagram of the detection device of the cell ID of the embodiment of the present invention three；
Fig. 5 is the another schematic diagram of the detection device of the cell ID of the embodiment of the present invention three；
Fig. 6 is another schematic diagram of the detection device of the cell ID of the embodiment of the present invention three.
Specific embodiment
Below in conjunction with drawings and examples, the specific embodiment of the present invention is described in further detail.Following reality
Example is applied for illustrating the present invention, but is not limited to the scope of the present invention.
Embodiment one
As shown in Figure 1, the detection method of the cell ID of the embodiment of the present invention one, including：
Step 101 obtains SSS frequency-region signals according to the SSS time-domain signals of present frame.
In this step, Fast Fourier Transform (FFT) (Fast Fourier are carried out to the SSS time-domain signals of the present frame
Transformation, FFT), obtain the SSS frequency-region signals.
Step 102, the difference correlated series that the present frame is obtained according to the SSS frequency-region signals.
In this step, difference related operation is carried out to the SSS frequency-region signals, obtains the difference correlation sequence of present frame
Row.
Step 103 carries out scrambler compensation to the difference correlated series, obtains the difference correlated series after scrambler compensation.
In this step, the difference correlated series with default 4 groups of difference scrambler sequences is multiplied respectively, obtains 4 groups
Difference correlated series after scrambler compensation.
Step 104, according to the scrambler compensate after difference correlated series, obtain time-domain difference correlated series.
In this step, the difference correlated series after compensating the scrambler carries out inverse Fourier transform (IFFT), obtains
The time-domain difference correlated series.
Step 105 obtains peak-peak in the time-domain difference correlated series, and is determined according to the peak-peak small
Area identifies.
In this step, the corresponding group number of the peak-peak and cell id are obtained, according to the group number and the cell
Number definite cell ID.
Preferably, in this step, it is related in four groups of time-domain differences that traversal step 104 obtains in order to improve reliability
Sequence and after obtaining the peak-peak in time-domain difference correlated series, it is default to can determine whether the peak-peak is greater than or equal to
Threshold value.If the peak-peak is greater than or equal to predetermined threshold value, the corresponding group number of the peak-peak and cell id, then root are obtained
Cell ID is determined according to the group number and the cell id.Wherein, which can rule of thumb set.
As seen from the above, in embodiments of the present invention, traversal search detection need not be carried out to possible cell ID,
Without the concern for possible cell ID number, cell ID, pole can be obtained by simple difference correlation computations and conversion
Big reduces operand and complexity, substantially increases detection speed.
Embodiment two
In the embodiment of the present invention two, it is described by taking NB-IOT systems as an example.Fig. 2 show the embodiment of the present invention two
Flow chart, Fig. 3 show the processing schematic diagram of the embodiment of the present invention two.With reference to Fig. 2 and Fig. 3, the channel of the embodiment of the present invention two
Method of estimation, including：
Step 201 obtains SSS frequency-region signals according to the SSS time-domain signals of present frame.
Specifically, in the SSS time-domain signals S of this present frame fT(n) Fourier transformation is done, obtains SSS frequency-region signals SF(n),
It is specific as follows：
SF(n)=FFT (ST(n)), n=0,1 ... .131.
Wherein, ST(n) SSS time-domain signals, S are representedF(n) SSS frequency-region signals are represented.
Step 202 carries out channel estimation to PSS frequency-region signals, obtains channel estimation value.
Specifically, in this step, utilize PSS frequency-region signals PF(n) plural phase is carried out with known PSS signal P (n)
It removes, obtains channel estimation value
Wherein,Represent channel estimation value, PF(n) PSS frequency-region signals, PSS signals known to P (n) expressions are represented.
Step 203 carries out frequency domain equalization using the channel estimation value to the SSS frequency-region signals, obtains frequency domain equalization
SSS frequency-region signals afterwards.
Specifically, utilize channel estimation valueTo SSS frequency-region signals SF(n) frequency domain equalization is carried out, after being equalized
SSS frequency-region signals
Wherein,SSS frequency-region signals after representing balanced, SF(n) SSS frequency-region signals are represented,Represent that channel is estimated
Evaluation；Conj (x) is the conjugate number for seeking x.
Step 204, according to the SSS frequency-region signals after the frequency domain equalization, obtain the difference correlated series of the present frame.
It willDifference related operation is carried out, obtains the difference correlation under frame f
Wherein,Represent the difference correlated series of present frame.
Step 205 carries out scrambler compensation to the difference correlated series, obtains the difference correlated series after scrambler compensation.
In this step, by the difference correlated series respectively with 4 groups of difference scrambler sequencesIt is multiplied, obtains 4 groups and disturb
Difference correlated series after code compensation
Wherein four groups of difference scrambler sequencesFor：
Step 206, according to the scrambler compensate after difference correlated series, obtain time-domain difference correlated series.
In this step, the difference correlated series after compensating the scrambler carries out inverse Fourier transform, when obtaining described
Domain difference correlated series
Step 207 obtains peak-peak in the time-domain difference correlated series, and is determined according to the peak-peak small
Area identifies.
In this step, peak value searching is carried out to 4 groups of IFFT results that step 206 obtains.That is, traversal step 206 obtains
4 groups of IFFT results find out peak-peak, and when peak-peak is greater than or equal to predetermined threshold value, obtains peak-peak and correspond to
Position group numberAnd cell idAnd the cell ID estimates of present frame are obtained according to group number and cell id
Step 208, multiple cell IDs according to acquisition, determine whether cell detection succeeds.
In embodiments of the present invention, the cell estimation ID values that step 207 obtains can be used as cell ID.But in order to
Accuracy is further improved, also multiple cell IDs of acquisition are sentenced using Probability Rule in the embodiment of the present invention
It is fixed.
Specifically, for the N-1 frame SSS time-domain signals of reception, repeat the above steps 201-207, obtains N-1 cell ID
Estimate
In n times testing result, ifIdentical number is more than preset value M, then it is assumed that cell detection success, it willAs final cell ID.The wherein N, M value can arbitrarily be set.
Wherein, the scheme of the embodiment of the present invention is suitable for the cell ID detecting systems based on CAZAC sequences such as NB-IOT.
As seen from the above, the embodiment of the present invention need not carry out traversal search detection to possible cell ID, need not
Consider possible cell ID numbers.By taking NB-IOT as an example, i.e., 2016 traversal detections need not be carried out, only with
The characteristic of CAZAC sequences, by 1 simple difference correlation computations and 4 times 131 points IFFT conversion can obtain cell ID,
Operand and complexity are greatly reduced, substantially increases detection speed.Moreover, the scheme of the embodiment of the present invention considers letter
The influence that road decline docking is collected mail number, make use of the current frequency domain channel of PSS signal acquisitions to estimate to SSS frequency-region signals into line frequency
Domain is balanced, eliminates the influence for the distorted signals that fading channel is brought, and improves the accuracy of cell ID detections.In addition, this hair
Using probability theory in bright embodiment, whether the same number in the cell ID result repeatedly obtained by judgement is more than preset value
Detection accuracy is improved, avoids the probability of false-alarm and false dismissal.
Embodiment three
As shown in figure 4, the detection device of the cell ID of the embodiment of the present invention three, including：
Signal processing module 401, for obtaining SSS frequency-region signals according to the secondary synchronization signal SSS time-domain signals of present frame；
Difference block 402, for obtaining the difference correlated series of the present frame according to the SSS frequency-region signals；Scrambler compensating module
403, for carrying out scrambler compensation to the difference correlated series, obtain the difference correlated series after scrambler compensation；Series processing
Module 404, for according to the difference correlated series after scrambler compensation, obtaining time-domain difference correlated series；Cell ID obtains
Modulus block 405 for obtaining the peak-peak in the time-domain difference correlated series, and determines cell according to the peak-peak
Mark.
Wherein, the signal processing module 401 is specifically used for, and quick Fu is carried out to the SSS time-domain signals of the present frame
In leaf transformation, obtain the SSS frequency-region signals.
Wherein, the scrambler compensating module 403 is specifically used for, and the difference correlated series is poor with default 4 groups respectively
Scrambler sequence is divided to be multiplied, obtains the difference correlated series after 4 groups of scramblers compensation.
Wherein, the series processing module 404 is specifically used for, and the difference correlated series after compensating the scrambler carries out Fu
In leaf inverse transformation, obtain the time-domain difference correlated series.
Wherein, the cell ID acquisition module 405 includes：First acquisition submodule, for obtaining the peak-peak
Corresponding group number and cell id；Determination sub-module is identified, for determining cell ID according to the group number and the cell id.
To ensure reliability, the cell ID acquisition module 405 further includes：Judging submodule, for determine it is described most
Whether big peak value is greater than or equal to predetermined threshold value；First acquisition submodule is specifically used for, if the peak-peak be more than or
Equal to predetermined threshold value, the corresponding group number of the peak-peak and cell id are obtained.
As shown in figure 5, to ensure reliability, described device further includes：
Channel estimation module 406 for carrying out channel estimation to primary synchronization signal PSS frequency-region signals, obtains channel estimation
Value；Frequency domain equalization module 407 for carrying out frequency domain equalization to the SSS frequency-region signals using the channel estimation value, obtains frequency
SSS frequency-region signals after the equilibrium of domain.At this point, the difference block 402 is specifically used for：According to the SSS frequencies after the frequency domain equalization
Domain signal obtains the difference correlated series of the present frame.
As shown in fig. 6, described device further includes：Cell detection module 408, for multiple cell IDs according to acquisition,
Determine whether cell detection succeeds.Specifically, the cell detection module is specifically used for：When identical in the multiple cell ID
Cell ID number be more than preset value when, determine cell detection success.
The operation principle of device of the present invention can refer to the description of preceding method embodiment.
As seen from the above, in embodiments of the present invention, traversal search detection need not be carried out to possible cell ID,
Without the concern for possible cell ID number, cell ID, pole can be obtained by simple difference correlation computations and conversion
Big reduces operand and complexity, substantially increases detection speed.
Example IV
The embodiment of the present invention four provides a kind of data processing equipment, including：Processor；And pass through bus interface and institute
State the memory that processor is connected, the memory for store the processor perform operate when used program and
Data, when processor calls and performs the program and data that are stored in the memory, including realizing following function mould
Block or unit：
Signal processing module, for obtaining SSS frequency-region signals according to the secondary synchronization signal SSS time-domain signals of present frame；
Difference block, for obtaining the difference correlated series of the present frame according to the SSS frequency-region signals；
Scrambler compensating module for carrying out scrambler compensation to the difference correlated series, obtains the difference after scrambler compensation
Correlated series；
Series processing module, for according to the difference correlated series after scrambler compensation, obtaining time-domain difference correlation sequence
Row；
Cell ID acquisition module, for obtaining the peak-peak in the time-domain difference correlated series, and according to described
Peak-peak determines cell ID.
It should be noted that the device that fourth embodiment of the invention provides is can to correspond to realize that above method embodiment carries
The device of the detection method of the cell ID of confession, therefore all realities of the detection method of the cell ID of above method embodiment offer
Applying example can be to should apply to the fourth embodiment, and can reach the same or similar advantageous effect.
In several embodiments provided herein, it should be understood that disclosed method and apparatus, it can be by other
Mode realize.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
For a kind of division of logic function, there can be other dividing mode in actual implementation, such as multiple units or component can combine
Or it is desirably integrated into another system or some features can be ignored or does not perform.Another, shown or discussed phase
Coupling, direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit
Connection can be electrical, machinery or other forms.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That the independent physics of unit includes, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be employed in member is realized, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, is used including some instructions so that a computer
Equipment (can be personal computer, server or the network equipment etc.) performs receiving/transmission method described in each embodiment of the present invention
Part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store
The medium of program code.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (18)
1. a kind of detection method of cell ID, which is characterized in that including：
SSS frequency-region signals are obtained according to the secondary synchronization signal SSS time-domain signals of present frame；
The difference correlated series of the present frame is obtained according to the SSS frequency-region signals；
Scrambler compensation is carried out to the difference correlated series, obtains the difference correlated series after scrambler compensation；
Difference correlated series after being compensated according to the scrambler obtains time-domain difference correlated series；
The peak-peak in the time-domain difference correlated series is obtained, and cell ID is determined according to the peak-peak.
2. the detection method of cell ID according to claim 1, which is characterized in that the auxiliary synchronization according to present frame
Signal SSS time-domain signals obtain the step of SSS frequency-region signals, including：
Fast Fourier Transform (FFT) is carried out to the SSS time-domain signals of the present frame, obtains the SSS frequency-region signals.
3. the detection method of cell ID according to claim 1, which is characterized in that described to the difference correlated series
The step of carrying out scrambler compensation, obtaining the difference correlated series after scrambler compensation, including：
The difference correlated series with default 4 groups of difference scrambler sequences is multiplied respectively, obtains the difference after 4 groups of scrambler compensation
Correlated series.
4. the detection method of cell ID according to claim 1, which is characterized in that after the compensation according to the scrambler
Difference correlated series, obtain time-domain difference correlated series the step of, be specially：
Difference correlated series after compensating the scrambler carries out inverse Fourier transform, obtains the time-domain difference correlated series.
5. the detection method of cell ID according to claim 1, which is characterized in that described to obtain the time-domain difference phase
The step of closing the peak-peak in sequence, and cell ID determined according to the peak-peak, including：
Obtain the corresponding group number of the peak-peak and cell id；
Cell ID is determined according to the group number and the cell id.
6. the detection method of cell ID according to claim 5, which is characterized in that obtain the peak-peak described
Before the step of corresponding group number and cell id, the method further includes：
Determine whether the peak-peak is greater than or equal to predetermined threshold value；
Described the step of obtaining the corresponding group number of the peak-peak and cell id, it is specially：
If the peak-peak is greater than or equal to predetermined threshold value, the corresponding group number of the peak-peak and cell id are obtained.
7. according to the detection method of claim 1-6 any one of them cell IDs, which is characterized in that described in the basis
Before SSS frequency-region signals obtain the step of difference correlated series of the present frame, the method further includes：
Channel estimation is carried out to primary synchronization signal PSS frequency-region signals, obtains channel estimation value；
Frequency domain equalization is carried out to the SSS frequency-region signals using the channel estimation value, obtains the SSS frequency domains letter after frequency domain equalization
Number；
It is described the present frame is obtained according to the SSS frequency-region signals difference correlated series the step of, be specially：
According to the SSS frequency-region signals after the frequency domain equalization, the difference correlated series of the present frame is obtained.
8. the detection method of cell ID according to claim 7, which is characterized in that the method further includes：According to obtaining
The multiple cell IDs obtained, determine whether cell detection succeeds.
9. the detection method of cell ID according to claim 8, which is characterized in that multiple cells according to acquisition
Mark, determines the whether successful step of cell detection, including：
When the number of cell ID identical in the multiple cell ID is more than preset value, cell detection success is determined.
10. a kind of detection device of cell ID, which is characterized in that including：
Signal processing module, for obtaining SSS frequency-region signals according to the secondary synchronization signal SSS time-domain signals of present frame；
Difference block, for obtaining the difference correlated series of the present frame according to the SSS frequency-region signals；
Scrambler compensating module, for carrying out scrambler compensation to the difference correlated series, the difference obtained after scrambler compensation is related
Sequence；
Series processing module, for according to the difference correlated series after scrambler compensation, obtaining time-domain difference correlated series；
Cell ID acquisition module, for obtaining the peak-peak in the time-domain difference correlated series, and according to the maximum
Peak value determines cell ID.
11. the detection device of cell ID according to claim 10, which is characterized in that the signal processing module is specific
For carrying out Fast Fourier Transform (FFT) to the SSS time-domain signals of the present frame, obtaining the SSS frequency-region signals.
12. the detection device of cell ID according to claim 10, which is characterized in that the scrambler compensating module is specific
For the difference correlated series with default 4 groups of difference scrambler sequences to be multiplied respectively, obtains the difference after 4 groups of scrambler compensation
Divide correlated series.
13. the detection device of cell ID according to claim 10, which is characterized in that the series processing module is specific
For the difference correlated series after compensating the scrambler to carry out inverse Fourier transform, obtains the time-domain difference correlated series.
14. the detection device of cell ID according to claim 10, which is characterized in that the cell ID acquisition module
Including：
First acquisition submodule, for obtaining the corresponding group number of the peak-peak and cell id；
Determination sub-module is identified, for determining cell ID according to the group number and the cell id.
15. the detection device of cell ID according to claim 14, which is characterized in that the cell ID obtains mould
Block further includes：
Judging submodule, for determining whether the peak-peak is greater than or equal to predetermined threshold value；
First acquisition submodule is specifically used for, if the peak-peak is greater than or equal to predetermined threshold value, obtains the maximum
The corresponding group number of peak value and cell id.
16. according to the detection device of claim 10-15 any one of them cell IDs, which is characterized in that described device is also
Including：
Channel estimation module for carrying out channel estimation to primary synchronization signal PSS frequency-region signals, obtains channel estimation value；
Frequency domain equalization module for carrying out frequency domain equalization to the SSS frequency-region signals using the channel estimation value, obtains frequency domain
SSS frequency-region signals after equilibrium；
The difference block is specifically used for：According to the SSS frequency-region signals after the frequency domain equalization, the difference of the present frame is obtained
Correlated series.
17. the detection device of cell ID according to claim 16, which is characterized in that described device further includes：
Cell detection module for multiple cell IDs according to acquisition, determines whether cell detection succeeds.
18. the detection device of cell ID according to claim 17, which is characterized in that the cell detection module is specific
For：When the number of cell ID identical in the multiple cell ID is more than preset value, cell detection success is determined.
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|---|---|---|---|
| CN201611040747.5A CN108075807B (en) | 2016-11-10 | 2016-11-10 | Cell identifier detection method and device |
Applications Claiming Priority (1)
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| CN112996005A (en) * | 2021-02-05 | 2021-06-18 | 展讯通信（上海）有限公司 | Method and equipment for measuring same-frequency cells |
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