CN104023386B - Transmitting terminal, receiving terminal and its frame synchornization method, frame synchronization system - Google Patents
Transmitting terminal, receiving terminal and its frame synchornization method, frame synchronization system Download PDFInfo
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- CN104023386B CN104023386B CN201310066684.0A CN201310066684A CN104023386B CN 104023386 B CN104023386 B CN 104023386B CN 201310066684 A CN201310066684 A CN 201310066684A CN 104023386 B CN104023386 B CN 104023386B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
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Abstract
The invention provides a kind of transmitting terminal, receiving terminal and its frame synchornization method, frame synchronization system.The frame synchornization method of the transmitting terminal includes：Zero correlation block domain expansion process is carried out to synchronizing sequence and difference processing, the frame head of the sequence pair data to be synchronized obtained using difference processing are marked, sends the data to be synchronized after frame head mark；The frame synchornization method of the receiving terminal includes：Data to be synchronized are received, synchrodata is treated and carries out difference processing, obtain differential data, differential data and local sequence are subjected to related operation, obtain correlation data, the peak value searched in correlation data, judge whether peak value number reaches the first preset value, if so, then performing simultaneously operating.By the implementation of the present invention, the false-alarm and false dismissal probability when receiving terminal carries out peak value searching in data synchronization process are reduced.
Description
Technical field
The present invention relates to the data syn-chronization field in the communication technology, more particularly to a kind of frame synchornization method of transmitting terminal, connect
Frame synchornization method, transmitting terminal, receiving terminal and the frame synchronization system of receiving end.
Background technology
Digital microwave telecommunication is a kind of point-to-point Line of Sight System, is mainly used in the carrying of 2G/3G mobile services
Network, carry out the transmission of voice-and-data business；And frame synchronizing occupies very important position in digital microwave telecommunication,
The signal that receiving terminal receives eliminates by down coversion, analog device interference, the laggard frame sync rank of digital timing recovery processing
Section, frame synchronization stage are mainly used in completing frame head mark to provide the configured information of frame head, the estimation of system frequency deviation value and frequency deviation benefit
The simultaneously operating such as repay, while also can indicate that synchronization/desynchronizing state of system, reflect the quality of channel condition.
In existing simultaneous techniques, receiving terminal to code character or being periodically detected for symbol by judging whether to enter synchronously
State, whether synchronous, and then mark frame head is compared to determine with a setting thresholding by the number that symbol or code character occur；This
Kind frame synchronization scheme antinoise and deviation capability are poor, peak detection process easily false-alarm and missing inspection caused by ghost peak and low signal-to-noise ratio
Probability is big, influences the stability after system link setup speed and link setup.
The content of the invention
The invention provides a kind of transmitting terminal, receiving terminal and its frame synchornization method, frame synchronization system, solves present frame
The problem of peakvalue's checking false-alarm and big false dismissal probability present in simultaneous techniques.
The invention provides a kind of frame synchornization method of transmitting terminal, in one embodiment, the frame synchronization side of the transmitting terminal
Method includes：Zero correlation block domain expansion process is carried out to synchronizing sequence；It is poor that the sequence obtained to zero correlation block domain expansion process is carried out
Manage office；The frame head of the sequence pair data to be synchronized obtained using difference processing is marked；Send and treated together after frame head mark
Step data.
The invention provides a kind of frame synchornization method of receiving terminal, in one embodiment, the frame synchronization side of the receiving terminal
Method includes：Receive data to be synchronized；Treat synchrodata and carry out difference processing, obtain differential data；By differential data and local
Sequence carries out related operation, obtains correlation data；The peak value searched in correlation data；Judge whether peak value number reaches
One preset value；If so, then perform simultaneously operating.
The invention provides a kind of transmitting terminal, and in one embodiment, the transmitting terminal includes：First processing module, second
Processing module and sending module；Wherein, first processing module is used to carry out synchronizing sequence zero correlation block domain expansion process, and will
Handle obtained sequence and carry out difference processing；Second processing module is used for the sequence pair data to be synchronized obtained using difference processing
Frame head be marked；Sending module is used to be sent out the data to be synchronized after frame head mark.
The invention provides a kind of receiving terminal, and in one embodiment, the receiving terminal includes：Receiving module, the 3rd processing
Module, fourth processing module, search module, judge module and synchronization module；Wherein, receiving module is used to receive number to be synchronized
According to；3rd processing module is used to carry out difference processing to the data to be synchronized that receiving module receives, and obtains differential data；Everywhere
The differential data that reason module is used to obtain the 3rd processing module carries out related operation with local sequence, obtains correlation data；
Search module is used for the peak value searched in the correlation data that fourth processing module obtains；Judge module is used to judge search module
Whether the peak value number searched reaches the first preset value；Synchronization module is peak value number for the judged result in judge module
When reaching the first preset value, simultaneously operating is performed.
The invention provides a kind of frame synchronization system, and in one embodiment, the frame synchronization system includes the present invention and provided
Transmitting terminal and receiving terminal.
Pass through the implementation of the present invention, there is provided a kind of frame synchronizing, transmitting terminal to synchronizing sequence by carrying out zero correlation
Region extends and difference processing, reduces the secondary lobe at correlation peaks both ends, when reducing receiving terminal correlation peaks being searched for
False-alarm and false dismissal probability；Receiving terminal carries out difference processing to the data received, has recovered transmitting terminal and has carried out difference to data
Influence caused by processing, also, all carry out difference processing in transmitting terminal and receiving terminal so that enter synchronous phase in system
When, calculating and the system frequency deviation compensation of system frequency deviation value can be rapidly performed by, improves the flexibility of the frequency offset correction of system；
Further, receiving terminal to peak value by carrying out validation checking, and synchronizes state according to the number of effective peak
Judge, avoid influence of the invalid peak value to synchronously judging.
Brief description of the drawings
Fig. 1 is the schematic diagram of the frame synchornization method for the transmitting terminal that one embodiment of the invention provides；
Fig. 2 is the schematic diagram of the frame synchornization method for the receiving terminal that one embodiment of the invention provides；
Fig. 3 is the schematic diagram for the peak value searching method that one embodiment of the invention provides；
Fig. 4 is the change curve of the correlation modulus value in one embodiment of the invention；
Fig. 5 is the change curve of the correlation modulus value in another embodiment of the present invention；
Fig. 6 is the schematic diagram for the frame synchronization system that one embodiment of the invention provides；
Fig. 7 is the schematic diagram for the transmitting terminal that one embodiment of the invention provides；
Fig. 8 is the schematic diagram for the receiving terminal that one embodiment of the invention provides；
Fig. 9 is the schematic diagram for the receiving terminal that another embodiment of the present invention provides.
Embodiment
Further annotation explanation is made to the present invention below by the mode of embodiment combination accompanying drawing.
Fig. 1 is the schematic diagram of the frame synchornization method for the transmitting terminal that one embodiment of the invention provides；As shown in Figure 1, in the reality
Apply in example, the frame synchornization method of transmitting terminal provided by the invention comprises the following steps：
S101：Zero correlation block domain expansion process is carried out to synchronizing sequence.
Preferably, the frame synchornization method of the transmitting terminal in embodiment illustrated in fig. 1 is before step S101, in addition to：Selection
The step of synchronizing sequence, synchronizing sequence are permanent envelope zero auto-correlation series.
The extension of zero correlation region is carried out to synchronizing sequence can reach the correlation that reduction receiving terminal progress related operation obtains
The effect of the secondary lobe of peak value both sides in value, realizing the mode of zero correlation region extension has many, in most highly preferred embodiment of the invention
In, from CAZAC（Constant Ampl itude Zero Auto Correlation, permanent envelope zero auto-correlation）Sequence is made
For synchronizing sequence, and zero correlation block domain expansion process is carried out to the synchronizing sequence.
S102：The sequence obtained to zero correlation block domain expansion process carries out difference processing.
After the sequence that is obtained to zero correlation block domain expansion process carries out difference processing, receiving terminal enter synchronous regime it
Afterwards, frequency deviation can be carried out according to the system frequency deviation value according into peak value quick computing system frequency deviation value during synchronous regime
Compensation.
Preferably, the frame synchornization method of the transmitting terminal in embodiment illustrated in fig. 1 is before step S102, in addition to：Obtain
The step of difference order M value sizes in difference processing；Can be specifically to estimate that M values are big according to the frequency deviation size of system
It is small, when the frequency deviation of system is larger, a less M value can be taken, when the frequency deviation of system is smaller, can take one it is larger
M values, conventional M spans are（2,64）；The value mode of M values can be the size of rule of thumb middle system frequency deviation value herein
Attempt value, if a M value can cause receiving terminal with transmitting terminal establishing the link quickly, then it is assumed that the M values properly, simultaneously
The M values are notified into receiving terminal and transmitting terminal, if a M value is so that receiving terminal with transmitting terminal is difficult to establish the link, then it is assumed that the M
It is worth improper, attempts other values, until it is determined that suitable M values, and notifies receiving terminal and transmitting terminal.
By adjusting difference order M, the frequency offset correction flexibility of system is improved；When M values exist（2,64）Between when, can
Using the relative frequency deviation scope of correction between positive and negative 0.5--0.008, if system operating frequency is f, then adjustable frequency deviation is exhausted
To value span between 0.5*f--0.008*f.
S103：The frame head of the sequence pair data to be synchronized obtained using difference processing is marked.
Frame synchronizing is search and the mark that frame head is realized using the group synchronization code inserted in signal, and group synchronization code has collection
Middle insertion and scattered insertion two ways, corresponding insertion signal is referred to as code character and symbol, according to different demands, microwave
There is use in communication system to both modes, it is independent to use a certain or be used in mixed way both；In the present embodiment, it is
Using the sequence that difference processing obtains as group synchronization code, transmitting terminal is that the sequence pair frame head obtained using step S102 is marked
Processing.
S104：The data to be sent being sent out after frame head mark.
Treat synchrodata frame head be marked after, transmitting terminal can to receiving terminal send frame head mark after treat
Synchrodata.
Fig. 2 is the schematic diagram of the frame synchornization method for the receiving terminal that one embodiment of the invention provides；As shown in Figure 2, in the reality
Apply in example, the frame synchornization method of receiving terminal provided by the invention comprises the following steps：
S201：Receive data to be synchronized.
S202：Treat synchrodata and carry out difference processing, obtain differential data.
Receiving terminal can carry out down-converted, analog device interference eliminates after data to be synchronized are received to data
Processing, digital timing recovery processing, because these processing and the core point of non-invention, its process repeat no more；Carry out difference
The data of processing can be the data or sampled data to be synchronized after digital timing recovery processing, and sampled data refers to
Data to be synchronized after digital timing recovery is handled are carried out with the data that optimum sampling point sampling obtains, now, step
S202 object is exactly sampled data；
In order to recover the influence that transmitting terminal is brought to synchronizing sequence progress difference processing, receiving terminal is treated synchrodata or adopted
Sample data carry out difference processing, and the difference order of its difference processing should be consistent with the difference order M values of transmitting terminal, and receiving terminal obtains
The mode of M values is diversified, is to increase to connect for informing in the header of data to be synchronized in highly preferred embodiment of the present invention
The receiving end data sending terminal uses the field of M values；Receiving terminal extracts the field before difference processing is carried out, and obtains M values,
Difference processing is carried out according to the M values of acquisition, can be specifically：M progress calculus of differences of data break to be synchronized, i.e., the 1st
Difference is carried out with the M+1 data, the 2nd and the M+2 data carry out difference, by that analogy.
S203：Differential data and local sequence are subjected to related operation, obtain correlation data.
Receiving terminal corresponding local sequence of related code character sequence selection according to used in transmitting terminal, by the sheet of selection
Ground sequence carries out related operation with differential data；Because the transmitting terminal in the present invention and receiving terminal can support the related code character of more sets
Sequence configures, and the application establishes the corresponding relation of related code character sequence used in transmitting terminal and local sequence in receiving terminal, connect
Local sequence corresponding to receiving end related code character sequence selection according to used in the data to be synchronized that each branch road receives, will be selected
Local sequence and differential data carry out related operation, can effectively reduce the interference under polarization mode between multiple signals, improve
The antijamming capability of system.
The related operation can be specifically mutual multiplication of conjugation etc.；When related operation is is conjugated mutual multiplication, step
S203 can be specifically：Delay time register is sent into the differential data output that S202 is obtained, by the local sequence of selection with connecing
The differential data received carries out related operation, obtains correlation data；Because local sequence, it is known that and value fix, it is whole
Individual delay time register only mainly can be made up of delay circuit and addition and subtraction circuit, simple in construction, and processing delay is small.
S204：The peak value searched in correlation data.
The purpose of the peak value in search correlation data can be reached in several ways, because step S203 processing obtains
Correlation data be plural number, in the preferred embodiment, can be according to the modulus value size of correlation carry out peak value
Reference picture 3 to 5 is described in detail for search, its specific search procedure.
S205：Judge whether peak value number reaches the first preset value；It is that then execution step S206, no, then return to step
S204。
In the preferred embodiment of the present invention, the step concrete implementation mode can set synchronous judgement meter
Number device, when S204 searches a peak value, the synchronization judges that the numerical value of counter adds " 1 ", when this synchronously judges counter
Numerical value n reaches the first preset value N1When, represent system and enter synchronous regime, then perform step S206.
S206：Perform simultaneously operating.
When S205 judged result judges that the numerical value n of counter reaches the first preset value N to be synchronous1When, perform synchronous behaviour
Make, such as frame head mark and system frequency deviation value calculate and frequency deviation compensation.
Preferably, in other embodiments, the frame synchornization method of the receiving terminal in embodiment illustrated in fig. 2 step S204 it
Also include afterwards：Detect the whether effective step of each peak value；Now step S205 is specifically to judge whether effective peak number reaches
To the first preset value；Specially：
By step S204 implementation, multiple peak values are may search for, after a peak value is searched, that is, enter detection
The whether effective step of the peak value, the step can be specifically：Judge the interval of peak value to be detected and its next adjacent peak
Whether the frame length of to be synchronized data is equal to；If so, then peak value to be detected is effective, the peak value is designated as effective peak；Otherwise, treat
It is invalid to detect peak value, the peak value is designated as invalid peak value；Can be specifically：
After first peak value is searched, open peak intervals and count, if next peak value reaches, former and later two peaks
The interval of value judges that the peak value is effective, otherwise judges that the peak value is invalid equal to the frame length of data to be synchronized；If second peak
Interval between value and first peak value is unsatisfactory for frame length, then restarts peak intervals as starting point using second peak value and count
Number, and judge to peaking follow-up, the like；When channel condition is more severe, initial, peak position is possible to
Moved after needing repeatedly.
After step S206, when system synchronizes, now just need to carry out frequency deviation compensation, and to carry out frequency deviation benefit
Repay, must just calculate system frequency deviation value, thus the frame synchornization method of the receiving terminal in embodiment illustrated in fig. 2 step S206 it
Afterwards, in addition to：The step of obtaining system frequency deviation value, and frequency deviation compensation carried out according to system frequency deviation value；Obtain system frequency deviation value
Mode have it is a variety of, in the preferred embodiment, obtain system frequency deviation value mode obtained according to peak value, specifically
Can be synchronized according to system before N1In individual effective peak any one, average value or N1Individual effective peak is counted
Calculate；For purposes of illustration only, setting the difference order of difference processing as M, the data message that receiving terminal is sent to transmitting terminal carries out numeral
After clock recovery during sampled data, used optimum sampling point is at intervals of Ts, according to N1Individual effective peak carrys out computing system
Frequency deviation value A, then calculation is：
First, according to N1The correlation comprising I/Q two-way of individual effective peak tangent of negating obtains frequency deviation angle w,
Secondly, according to system frequency deviation value A=w/ (2 π MTs), system frequency deviation value is calculated.
After step S206, system is carried out after data syn-chronization operation, it is necessary to inspection system whether step-out, therefore Fig. 2
The frame synchornization method of receiving terminal in illustrated embodiment after step S206, in addition to：Detecting system whether step-out the step of；
Realize inspection system whether the method for step-out have it is a variety of, in the preferred embodiment, the monitoring method can be judge
The number of invalid peak value whether reach the second preset value come detecting system whether step-out, it is optimal, can be detection consecutive invalid
The number of peak value come detecting system whether step-out, when the number that invalid peak value continuously occurs reaches the second preset value N2When, instruction
System step-out, perform out-of-step operation；For the stability after lifting system link setup, N can be set as2﹥ N1, so taking into account
While system link setup speed, the stability after system link setup is also improved.
In order to further reduce peak value missing inspection and false-alarm probability, searched for present invention provides one kind by repeatedly opening a window
The technology of peak value, Fig. 3 are the schematic diagram for the peak value searching method that one embodiment of the invention provides, and Fig. 4 is one embodiment of the invention
In correlation modulus value change curve, Fig. 5 be another embodiment of the present invention in correlation modulus value change curve；It is existing
Illustrated with reference to Fig. 3, Fig. 4 and Fig. 5；From the figure 3, it may be seen that peak value searching method provided by the invention comprises the following steps：
S301：Whether inspection center's window value is more than first threshold Th1；
Reference picture 4, the correlation modulus value size of its center window value is Yk, now step S301 is to detect the Y in Fig. 4k
With first threshold Th1Size；If Yk≥Th1, then step S302 is performed, if Yk＜ Th1, then the center window value is not peak value,
Into the judgement flow of next center window value；
S302：Whether the difference of inspection center's window value window value adjacent thereto is more than Second Threshold Th2；
Reference picture 4, setting procedure S302 are each K window in correlation modulus value both sides adjacent thereto of inspection center's window value
Whether the difference of the correlation modulus value of value is more than Second Threshold Th2, each K in both sides, now then need Correlation Centre window value YkWith
The difference of the correlation modulus value of 2K window value and Second Threshold Th2Size, now step S302 be detection Fig. 4 in
（Yk-Y1）、（Yk-Y2）、……、（Yk-Yk-1）、（Yk-Yk+1）、（Yk-Yk+2）、……、（Yk-Y2k）With Second Threshold Th2Size；
If（Yk-Y1）、（Yk-Y2）、……、（Yk-Yk-1）、（Yk-Yk+1）、（Yk-Yk+2）、……、（Yk-Y2k）Both greater than or equal to Th2, then
Step S303 is performed, if it is not, then the center window value is not peak value, into the judgement flow of next center window value；
S303：Using the maximum related value of center window value as peak value；
When system synchronization is in good condition, a center window value typically only correlation, now, this correlation is made
For peak value；When system synchronization state is very poor, it can cause the situation of multiple correlations occur in a center window, such as scheme
Shown in 4, now, 2c correlation of center window is compared, selects modulus value institute maximum in these correlation modulus value right
The correlation answered is the Y that will be detected in Fig. 4 as peak valuek-c、Yk-c+1、……、Yk+c-1、Yk+cSize, by it is therein most
Correlation corresponding to big modulus value is as peak value, in the preferred embodiment of the present invention, c ＜ k；Predictably, will
Multiple correlations be compared in order to ensure be not in peak value missing inspection situation.
Fig. 5 is the change curve of the correlation modulus value in another embodiment of the present invention, and specific is the hair in the present invention
After sending end uses the sequence after carrying out zero correlation block domain expansion process and difference processing to CAZAC sequences to carry out frame head mark, connect
Receiving end treats the software emulation figure of correlation modulus value that synchrodata is sampled, obtained after difference processing and relevant treatment；Will
Its change with being sampled obtained correlation modulus value using the data after existing conventional synchronizing sequence progress frame head mark
Change curve map, i.e., the change curve shown in Fig. 4, be compared, can intuitively find out, the center window value shown in Fig. 5
The secondary lobe of correlation both sides is smaller than the secondary lobe of the correlation both sides in Fig. 4, and center window value protrudes.In conjunction with Fig. 3 and Fig. 5 do into
The explanation of one step：
It can clearly find out that its center window value is Y by Fig. 5k, now, the step S301 in Fig. 3 is in detection Fig. 5
YkWith first threshold Th1Size；Only in Yk≥Th1When, perform step S302；
It can clearly find out that the both sides of its center window are horizontal zone by Fig. 5, be not in peak in this region
Value；It is more or less the same in the window value of K window of the center window both sides, and and YkDifference it is stable, therefore, with reference to above-mentioned reality
Example is applied, sets whether step S302 in Fig. 3 is more than the as the difference of inspection center's window value both sides adjacent thereto K window value
Two threshold value Th2, now, step S302 is in detection Fig. 5（Yk-Y1）、……、（Yk-Y2k）With Second Threshold Th2Size；
Only exist（Yk-Y1）、……、（Yk-Y2k）All >=Th2, then step S303 is performed；
In Figure 5, due to carrying out the extension process in zero correlation region to synchronizing sequence in transmitting terminal, what receiving terminal detected
The correlation of the center window of correlation modulus value protrudes；Now, the comparison speed of the step S303 in Fig. 3 just quickly because this
When only need to carry out to be less than 2c, usually 1 to 3, the comparison of correlation size, can quickly determine the peak value of center window.
Fig. 6 is the schematic diagram for the frame synchronization system that one embodiment of the invention provides；It will be appreciated from fig. 6 that in the present embodiment, this
The frame synchronization system 6 that invention provides includes：Transmitting terminal 61 and receiving terminal 62, wherein,
Transmitting terminal 61, for carrying out zero correlation block domain expansion process to synchronizing sequence, and obtained sequence progress will be handled
Difference processing, the frame head of the sequence pair data to be synchronized obtained using difference processing are marked, and send frame header note after
Data to be synchronized；
Receiving terminal 62, the data to be synchronized sent for receiving end/sending end 61；Treat synchrodata and carry out difference processing, obtain
To differential data；Differential data and local sequence are subjected to related operation, obtain correlation data；Search in correlation data
Peak value；Judge whether peak value number reaches the first preset value；If so, then perform simultaneously operating.
Fig. 7 is the schematic diagram for the transmitting terminal that one embodiment of the invention provides；As shown in Figure 7, in the present embodiment, Fig. 6 institutes
Show that the transmitting terminal 61 in embodiment includes：First processing module 611, Second processing module 612 and sending module 613；Wherein,
First processing module 611 is used to carry out zero correlation block domain expansion process to the synchronizing sequence of data to be sent, and right
Handle obtained sequence and carry out difference processing；
Second processing module 612 is used for the sequence pair data to be synchronized obtained using the difference processing of first processing module 611
Frame head processing is marked；
Sending module 613 is used to be sent out the data to be synchronized for carrying the frame head after Second processing module 612 marks,
The data to be synchronized being sent out after frame head mark.
In other embodiments, the transmitting terminal 61 in embodiment illustrated in fig. 7 also includes selecting module, and selecting module is used to select
Synchronizing sequence is selected, synchronizing sequence is CAZAC series, and transfers to first processing module 611 to be handled.
In other embodiments, the transmitting terminal 61 in embodiment illustrated in fig. 7 also includes the first acquisition module, and first obtains mould
Block is used for the exponent number value M for obtaining difference processing, and transfers to first processing module 611 to be used to carry out difference processing to synchronizing sequence.
Fig. 8 is the schematic diagram for the receiving terminal that one embodiment of the invention provides；As shown in Figure 8, in the present embodiment, Fig. 6 institutes
Show that the receiving terminal 62 in embodiment includes：Receiving module 621, the 3rd processing module 622, fourth processing module 623, search module
624th, judge module 625 and synchronization module 626；Wherein,
Receiving module 621 is used to receive data to be synchronized；
The data to be synchronized that 3rd processing module 622 is used to receive receiving module 621 carry out difference processing, obtain difference
Divided data；
Fourth processing module 623 is used for the differential data that the 3rd processing module 622 obtains is related to the progress of local sequence
Computing, obtain correlation data；
Search module 624 is used for the peak value searched in the correlation data that fourth processing module 623 obtains；
Judge module 625 is used to judge whether the peak value number that search module 624 searches reaches the first preset value；
Synchronization module 626 is used to, when the judged result of judge module 625 reaches the first preset value for peak value number, perform
Simultaneously operating.
In another preferred embodiment of the present invention, the search module 624 in embodiment illustrated in fig. 7 is used for inspection center's window
Whether value is more than first threshold；If center window value is more than first threshold, inspection center's window value window value adjacent thereto
Whether difference is more than Second Threshold；If so, then using the maximum related value of center window value as peak value.
Fig. 9 is the schematic diagram for the receiving terminal that another embodiment of the present invention provides；As shown in Figure 9, in the present embodiment, Fig. 8
Receiving terminal 62 in illustrated embodiment also includes the second acquisition module 627 and compensating module 628；Wherein,
Second acquisition module 627 is used to obtain system frequency deviation value according to peak value, and is transferred to compensating module 628；
Compensating module 628 is used to carry out frequency deviation benefit to data according to the system frequency deviation value that the second acquisition module 627 is got
Repay.
In another preferred embodiment of the present invention, the receiving terminal in embodiment illustrated in fig. 8 also includes detection module；Detect mould
Whether block is effective for detecting each peak value that search module 624 searches；Judge module 625 is additionally operable to judge that detection module detects
To effective peak number whether reach the first preset value；It is to have that synchronization module 626, which is used in the judged result of judge module 625,
When effect peak value number reaches the first preset value, simultaneously operating is performed.
In another preferred embodiment of the present invention, the detection module in above-described embodiment is used to judge peak value to be detected and its
Whether the interval of next adjacent peak is equal to the frame length of data to be synchronized；If so, then peak value to be detected is effective, it has been designated as
Imitate peak value；Otherwise, peak value to be detected is invalid, is designated as invalid peak value.
In another preferred embodiment of the present invention, the judge module 625 in above-described embodiment is additionally operable to judge detection module
Whether the number of the invalid peak value detected reaches the second preset value；Synchronization module 626 is additionally operable to the judgement when judge module 625
When as a result reaching the second preset value for invalid peak value number, out-of-step operation is performed.
From the foregoing, it will be observed that by the implementation of the present invention, at least possesses following beneficial effect：
1st, transmitting terminal reduces the secondary lobe at correlation peaks both ends by carrying out zero correlation region extension to synchronizing sequence,
Reduce the false-alarm and false dismissal probability when receiving terminal is searched for correlation peaks；
2nd, receiving terminal to peak value by carrying out validation checking, and synchronizes operation according to the number of effective peak,
Avoid influence of the invalid peak value to simultaneously operating；
3rd, receiving terminal carries out difference processing to the data received, has recovered transmitting terminal and data progress difference processing is made
Into influence, improve the flexibility of the frequency offset correction of system；
4th, difference processing is all carried out in transmitting terminal and receiving terminal so that, can be quick when data enter synchronous phase
Carry out calculating and the system frequency deviation compensation of system frequency deviation value so that system frequency deviation value can be quickly calculated after system synchronization,
For frequency offset correction, shorten the link setup time of system, after this method of generally use the link setup time can reduce by 2 physical frames
Time；
5th, judge whether peak value is effective using strict peak intervals decision criteria, and further set synchronous, step-out
Decision threshold, taken into account that system link setup speed is fast and the two high demands of stability；
6th, transmitting terminal code character sequence related to the more sets of receiving terminal support configures, and a set of related code character sequence and a set of local
Sequence is corresponding, can effectively reduce the interference under polarization mode between two paths of signals, improves the antijamming capability of system；
7th, by adjusting synchronizing sequence length and difference order the two parameters, you can to meet under different radio channel
Frame synchronization and frequency offset correction demand so that the specific wider application scenarios of the present invention.
It the above is only the embodiment of the present invention, any formal limitation not done to the present invention, it is every
Any simple modification, equivalent variations or the modification that technical spirit according to the present invention is made to embodiment of above, still fall within
The protection domain of technical solution of the present invention.
Claims (19)
- A kind of 1. frame synchornization method of transmitting terminal, it is characterised in that including：Zero correlation block domain expansion process is carried out to synchronizing sequence；The sequence obtained to zero correlation block domain expansion process carries out difference processing；The frame head of the sequence pair data to be synchronized obtained using difference processing is marked；Send the data to be synchronized after frame head mark.
- 2. the frame synchornization method of transmitting terminal as claimed in claim 1, it is characterised in that zero correlation block is being carried out to synchronizing sequence Before domain expansion process, in addition to：The step of selecting synchronizing sequence, the synchronizing sequence are permanent envelope zero auto-correlation series.
- 3. the frame synchornization method of transmitting terminal as claimed in claim 1 or 2, it is characterised in that to the extension of zero correlation region Before managing obtained sequence progress difference processing, in addition to：The step of obtaining the exponent number value of the difference processing.
- A kind of 4. frame synchornization method of receiving terminal, it is characterised in that including：Receive the data to be synchronized after the frame synchornization method processing via the transmitting terminal as described in claim any one of 1-3；Difference processing is carried out to the data to be synchronized, obtains differential data；The differential data and local sequence are subjected to related operation, obtain correlation data；The peak value searched in the correlation data；Judge whether peak value number reaches the first preset value；If so, then perform simultaneously operating.
- 5. the frame synchornization method of receiving terminal as claimed in claim 4, it is characterised in that in the search correlation data Peak value the step of be specially：Whether inspection center's window value is more than first threshold；If the center window value is more than described the Whether one threshold value, the then difference for detecting the center window value window value adjacent thereto are more than Second Threshold；If so, then by center The maximum related value of window value is as the peak value.
- 6. the frame synchornization method of receiving terminal as claimed in claim 4, it is characterised in that judging whether peak value number reaches Before one preset value, in addition to：Detect the whether effective step of each peak value；It is described to judge whether peak value number reaches first and preset The step of value is specially：Judge whether effective peak number reaches the first preset value.
- 7. the frame synchornization method of receiving terminal as claimed in claim 6, it is characterised in that whether each peak value of detection is effective Step is specially：Judge whether the interval of peak value to be detected and its next adjacent peak is equal to the frame length of the data to be synchronized Degree；If so, then the peak value to be detected is effective peak；Otherwise, the peak value to be detected is invalid peak value.
- 8. the frame synchornization method of receiving terminal as claimed in claim 7, it is characterised in that after simultaneously operating is performed, also wrap Include：Judge whether the number of invalid peak value reaches the second preset value, in this way, then perform out-of-step operation.
- 9. the frame synchornization method of the receiving terminal as described in any one of claim 4 to 8, it is characterised in that performing simultaneously operating Afterwards, in addition to：System frequency deviation value is obtained according to the peak value, and the step of frequency deviation compensation is carried out according to the system frequency deviation value Suddenly.
- A kind of 10. transmitting terminal, it is characterised in that including：First processing module, Second processing module and sending module；Wherein,The first processing module is used to carry out synchronizing sequence zero correlation block domain expansion process, and the sequence that processing is obtained is entered Row difference processing；The frame head for the sequence pair data to be synchronized that the Second processing module is used to obtain using difference processing is marked；The sending module is used to send the data to be synchronized after frame head mark.
- 11. transmitting terminal as claimed in claim 10, it is characterised in that also including selecting module, the selecting module is used to select The synchronizing sequence is selected, the synchronizing sequence is permanent envelope zero auto-correlation series.
- 12. the transmitting terminal as described in claim 10 or 11, it is characterised in that also obtained including the first acquisition module, described first Modulus block is used for the exponent number value for obtaining the difference processing.
- A kind of 13. receiving terminal, it is characterised in that including：Receiving module, the 3rd processing module, fourth processing module, search mould Block, judge module and synchronization module；Wherein,The receiving module is used to receive the number to be synchronized sent via the transmitting terminal as described in claim any one of 10-12 According to；3rd processing module is used to carry out difference processing to the data to be synchronized that the receiving module receives, and obtains difference number According to；The fourth processing module is used for the differential data that the 3rd processing module obtains and the related fortune of local sequence progress Calculate, obtain correlation data；The search module is used for the peak value searched in the correlation data that the fourth processing module obtains；The judge module is used to judge whether the peak value number that the search module searches reaches the first preset value；The synchronization module is used to, when the judged result of the judge module reaches the first preset value for peak value number, perform same Step operation.
- 14. receiving terminal as claimed in claim 13, it is characterised in that whether the search module is used for inspection center's window value More than first threshold；If the center window value is more than the first threshold, the center window value window adjacent thereto is detected Whether the difference of mouth value is more than Second Threshold；If so, then using the maximum related value of center window value as the peak value.
- 15. receiving terminal as claimed in claim 13, it is characterised in that also including detection module；The detection module is used to examine Whether effective survey each peak value that the search module searches；The judge module is additionally operable to judge that the detection module detects Effective peak number whether reach the first preset value；It is to have that the synchronization module, which is used in the judged result of the judge module, When effect peak value number reaches the first preset value, simultaneously operating is performed.
- 16. receiving terminal as claimed in claim 15, it is characterised in that the detection module is used to judge peak value to be detected and its Whether the interval of next adjacent peak is equal to the frame length of the data to be synchronized；If so, then the peak value to be detected is effective Peak value, otherwise, the peak value to be detected are invalid peak value.
- 17. receiving terminal as claimed in claim 16, it is characterised in that the judge module is additionally operable to judge the detection module Whether the number of the invalid peak value detected reaches the second preset value；The synchronization module is additionally operable to sentencing when the judge module When disconnected result is that invalid peak value number reaches the second preset value, out-of-step operation is performed.
- 18. the receiving terminal as described in any one of claim 13 to 17, it is characterised in that also including the second acquisition module and compensation Module；Second acquisition module is used to obtain system frequency deviation value according to the peak value, and the compensating module is used for according to System frequency deviation value carries out frequency deviation compensation.
- 19. a kind of frame synchronization system, it is characterised in that including the transmitting terminal as described in any one of claim 10 to 12, and 13 To the receiving terminal described in 18 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310066684.0A CN104023386B (en) | 2013-03-01 | 2013-03-01 | Transmitting terminal, receiving terminal and its frame synchornization method, frame synchronization system |
| PCT/CN2013/091109 WO2014131312A1 (en) | 2013-03-01 | 2013-12-31 | Frame synchronization method and system, transmitting terminal, receiving terminal and computer storage medium |
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| CN201310066684.0A CN104023386B (en) | 2013-03-01 | 2013-03-01 | Transmitting terminal, receiving terminal and its frame synchornization method, frame synchronization system |
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| CN104023386A CN104023386A (en) | 2014-09-03 |
| CN104023386B true CN104023386B (en) | 2018-03-06 |
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| CN106559209B (en) * | 2015-09-21 | 2020-07-17 | 中兴通讯股份有限公司 | Frame synchronization method and device |
| US11005802B1 (en) * | 2020-06-25 | 2021-05-11 | Sony Corporation | Importance determination for undelivered messages |
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| CN1502182A (en) * | 2001-02-16 | 2004-06-02 | �����ɷ� | Parallel spread spectrum communication system and method |
| CN101005307A (en) * | 2006-01-16 | 2007-07-25 | 上海原动力通信科技有限公司 | Synchronizing method for broad band time division duplex honey comb system and cell primary searching |
| WO2008108294A1 (en) * | 2007-03-05 | 2008-09-12 | Yamaguchi University | Approximately synchronized cdma transmitter/receiver |
| CN101924726A (en) * | 2009-06-17 | 2010-12-22 | 国民技术股份有限公司 | Frame synchronization method and device for OFDM system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101018087B (en) * | 2006-02-09 | 2010-09-08 | 大唐移动通信设备有限公司 | Downlink synchronization method and device of the mobile communication system |
| CN101499843B (en) * | 2008-01-30 | 2012-07-04 | 京信通信系统（中国）有限公司 | Common frequency multi-cell downlink synchronization method applied to WCDMA system |
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- 2013-03-01 CN CN201310066684.0A patent/CN104023386B/en active Active
- 2013-12-31 WO PCT/CN2013/091109 patent/WO2014131312A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502182A (en) * | 2001-02-16 | 2004-06-02 | �����ɷ� | Parallel spread spectrum communication system and method |
| CN101005307A (en) * | 2006-01-16 | 2007-07-25 | 上海原动力通信科技有限公司 | Synchronizing method for broad band time division duplex honey comb system and cell primary searching |
| WO2008108294A1 (en) * | 2007-03-05 | 2008-09-12 | Yamaguchi University | Approximately synchronized cdma transmitter/receiver |
| CN101924726A (en) * | 2009-06-17 | 2010-12-22 | 国民技术股份有限公司 | Frame synchronization method and device for OFDM system |
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| WO2014131312A1 (en) | 2014-09-04 |
| CN104023386A (en) | 2014-09-03 |
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Effective date of registration: 20221130 Address after: 518055 Zhongxing Industrial Park, Liuxian Avenue, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SANECHIPS TECHNOLOGY Co.,Ltd. Address before: 518057 Zhongxing building, science and technology south road, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee before: ZTE Corp. |