CN109218242A - Symbol timing synchronization method, signal adjustment system and computer readable storage medium - Google Patents
Symbol timing synchronization method, signal adjustment system and computer readable storage medium Download PDFInfo
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- CN109218242A CN109218242A CN201710531001.2A CN201710531001A CN109218242A CN 109218242 A CN109218242 A CN 109218242A CN 201710531001 A CN201710531001 A CN 201710531001A CN 109218242 A CN109218242 A CN 109218242A
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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
- H04L27/2662—Symbol synchronisation
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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
- H04L27/2668—Details of algorithms
- H04L27/2681—Details of algorithms characterised by constraints
- H04L27/2686—Range of frequencies or delays tested
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The invention discloses a kind of symbol timing synchronization method, signal adjustment system and computer readable storage mediums, the symbol timing synchronization method includes: transmitting terminal with any base band link for the first benchmark road, and the frame structure parameter based on the first benchmark road carries out the adjustment of frame structure parameter to other base band links of transmitting terminal respectively；Transmitting terminal is adjustment road with any base band link adjusted, and the frame structure parameter based on adjustment road calculates separately other base band links and adjusts the time delay between road；Transmitting terminal carries out sign synchronization according to the time delay between every other base band link and adjustment road, to the frame structure parameter of all base band links.The present invention is mutually coordinated by carrying out the signal frame structure parameter of base band link, calculate the time delay of different base band links, carry out chain-circuit time delay adjustment, so that baseband signal can be in transmission process effectively to send in an orderly manner, improve signal data efficiency of transmission, and then the communication quality of promotion signal adjustment system.
Description
Technical field
The present invention relates to communication technique field more particularly to a kind of symbol timing synchronization methods, signal adjustment system and computer
Readable storage medium storing program for executing.
Background technique
With the fast development of the wireless data transmission communication technology, demand of the people to data transmission efficiency is also increasingly
It is high.Currently, telecommunication transmission system is made of indoor unit and outdoor unit, and indoor unit and outdoor unit generally use intermediate frequency line
Cable connects, each other data transmit-receive end.Since the IF cable length used has differences, each transmission end signal is caused to reach respective
When transmitting terminal antenna, sends end signal and be misaligned.Also, the propagation delay time of space link is also inconsistent, so for receiving
It holds for antenna, the signal of each antenna of the transmitting terminal received, which will appear, to be misaligned, and signal is misaligned, and will reduce sending and receiving end
Data transmission efficiency, and then reduce communication quality.
Summary of the invention
The main purpose of the present invention is to provide a kind of symbol timing synchronization method, signal adjustment system and computer-readable storages
Medium, it is intended to solve symbol and be misaligned the technical issues of causing communication quality to reduce.
To achieve the above object, the embodiment of the present invention provides a kind of symbol timing synchronization method based on transmitting terminal, described to be based on
The symbol timing synchronization method of transmitting terminal includes:
Transmitting terminal is with any base band link for the first benchmark road, and the frame structure parameter based on the first benchmark road is respectively to transmission
Other base band links at end carry out the adjustment of frame structure parameter；
Transmitting terminal is adjustment road with any base band link adjusted, and the frame structure parameter based on adjustment road calculates separately it
Time delay between his base band link and adjustment road；
Transmitting terminal joins the frame structure of all base band links according to the time delay between every other base band link and adjustment road
Number carries out sign synchronization.
Optionally, the transmitting terminal with any base band link for the first benchmark road, join by the frame structure based on the first benchmark road
Number carries out the step of frame structure parameter adjusts to other base band links of transmitting terminal respectively
Transmitting terminal with any base band link be the first benchmark road, to other base band links of transmitting terminal send heartbeat signal and
Parameter information；
Transmitting terminal obtains the target ginseng that other base band links are sent to the first benchmark road based on heartbeat signal and parameter information
Number information；
First ray of the transmitting terminal based on target component information and the first benchmark road is to the second sequence in other base band links
Column carry out symbol offset, to maintain First ray and the second sequence of other base band links to mutually stagger in each base band link.
Optionally, the transmitting terminal is according to the time delay between every other base band link and adjustment road, to all base band chains
The frame structure parameter on road carried out after the step of sign synchronization further include:
Transmitting terminal sends calibration information to receiving end based on the base band link for completing sign synchronization, accords with so that receiving end calculates
Number deviant；
The time delay for symbol offset value adjustment all base band links of transmitting terminal that transmitting terminal is fed back according to receiving end.
Optionally, symbol offset value adjustment all base band links of transmitting terminal that the transmitting terminal is fed back according to receiving end when
Before the step of prolonging further include:
Transmitting terminal detects the symbol offset value whether all base band links all receive receiving end feedback；
When all base band links of transmitting terminal do not receive the symbol offset value of receiving end feedback all, reacquires and receive
Hold the symbol offset value of feedback.
Optionally, symbol offset value adjustment all base band links of transmitting terminal that the transmitting terminal is fed back according to receiving end when
The step of prolonging include:
Transmitting terminal obtains all symbol offset values of receiving end feedback, and all symbol offset values are mapped to corresponding base
Band link；
Time delay of the transmitting terminal based on symbol offset value and all corresponding base band links of default error transfer factor, the default mistake
The difference delay variation error that data communication generates between each base band branch.
Optionally, the transmitting terminal is in training frames adjustment modes,
The step of the time delay for symbol offset value adjustment all base band links of transmitting terminal that the transmitting terminal is fed back according to receiving end
After rapid further include:
Base band link is switched to data frame sending mode by training frames adjustment modes by transmitting terminal, and data frame is sent mould
Formula is synchronized to receiving end.
Optionally, the symbol timing synchronization method based on receiving end includes:
Receiving end receives the calibration information for all base band links that transmitting terminal is sent；
Receiving end with any base band link be the second benchmark road, and according to calibration information calculate separately other base band links with
The symbol offset value on the second benchmark road；
Symbol offset value is fed back to corresponding base band link in transmitting terminal by receiving end.
Optionally, during the symbol offset value is according to the symbol offset and symbol transmission of the calibration information of base band link
Error deviation calculate obtain.
System is adjusted the present invention also provides a kind of signal, and signal adjustment system includes transmitting terminal and receiving end, described
Transmitting terminal includes:
The first adjustment module, for, for the first benchmark road, the frame structure based on the first benchmark road to be joined with any base band link
Number carries out the adjustment of frame structure parameter to other base band links of transmitting terminal respectively；
First computing module, for being adjustment road with any base band link adjusted, the frame structure ginseng based on adjustment road
Number calculates separately other base band links and adjusts the time delay between road；
Synchronization module, for according to every other base band link and adjustment road between time delay, to all base band links
Frame structure parameter carries out sign synchronization.
Sending module, for sending calibration information to receiving end based on the base band link for completing sign synchronization；
Second adjustment module, for being fed back according to receiving end symbol offset value adjustment all base band links of transmitting terminal when
Prolong；
The receiving end includes:
Receiving module, the calibration information of all base band links for receiving transmitting terminal transmission；
Second computing module is used for any base band link as the second benchmark road, and calculates separately it according to calibration information
The symbol offset value of his base band link and the second benchmark road；
Feedback module, for symbol offset value to be fed back to corresponding base band link in transmitting terminal.
In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium
Storage medium be stored with one perhaps more than one program the one or more programs can by one or one with
On processor execute to be used for:
Transmitting terminal is with any base band link for the first benchmark road, and the frame structure parameter based on the first benchmark road is respectively to transmission
Other base band links at end carry out the adjustment of frame structure parameter；
Transmitting terminal is adjustment road with any base band link adjusted, and the frame structure parameter based on adjustment road calculates separately it
Time delay between his base band link and adjustment road；
Transmitting terminal joins the frame structure of all base band links according to the time delay between every other base band link and adjustment road
Number carries out sign synchronization.
In technical solution of the present invention, transmitting terminal with any base band link be the first benchmark road, based on the first benchmark road
Frame structure parameter carries out the adjustment of frame structure parameter to other base band links of transmitting terminal respectively；Then transmitting terminal is with adjusted
One base band link be adjustment road, based on adjustment road frame structure parameter calculate separately other base band links and adjust road between when
Prolong；Last transmitting terminal joins the frame structure of all base band links according to the time delay between every other base band link and adjustment road
Number carries out sign synchronization.The present invention is mutually coordinated by carrying out the signal frame structure parameter of base band link, calculates different bases
Time delay with link carries out chain-circuit time delay adjustment, so that baseband signal can be in transmission process with effectively orderly
Ground is sent, and improves signal data efficiency of transmission, and then the communication quality of promotion signal adjustment system.
Detailed description of the invention
Fig. 1 is to adjust process one the present invention is based on frame structure in the symbol timing synchronization method first embodiment of transmitting terminal to illustrate
Figure；
Fig. 2 is that the present invention is based on the flow diagrams of the symbol timing synchronization method first embodiment of transmitting terminal；
Fig. 3 is transmitting terminal described in the symbol timing synchronization method second embodiment the present invention is based on transmitting terminal with any base band chain
Road is the first benchmark road, and the frame structure parameter based on the first benchmark road carries out frame structure to other base band links of transmitting terminal respectively
The refinement flow diagram for the step of parameter adjusts；
Fig. 4 is that the present invention is based on the flow diagrams of the symbol timing synchronization method 3rd embodiment of transmitting terminal；
Fig. 5 is that the present invention is based on the flow diagrams of the symbol timing synchronization method fourth embodiment of transmitting terminal；
Fig. 6 is anti-according to receiving end for transmitting terminal described in the 5th embodiment of symbol timing synchronization method the present invention is based on transmitting terminal
The refinement flow diagram of the step of time delay of symbol offset value adjustment all base band links of transmitting terminal of feedback；
Fig. 7 is that the present invention is based on the flow diagrams of the symbol timing synchronization method sixth embodiment of transmitting terminal；
Fig. 8 is that the present invention is based on the flow diagrams of the symbol timing synchronization method first embodiment of receiving end；
Fig. 9 is the system schematic that signal of the present invention adjusts system；
Figure 10 is the device structure schematic diagram for the hardware running environment that present invention method is related to.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of symbol timing synchronization method based on transmitting terminal, in the symbol timing synchronization method first based on transmitting terminal
In embodiment, referring to Fig. 2, the symbol timing synchronization method based on transmitting terminal includes:
Step S10, transmitting terminal with any base band link for the first benchmark road, divide by the frame structure parameter based on the first benchmark road
Other other base band links to transmitting terminal carry out the adjustment of frame structure parameter；
In transceiver communication device, transmitting terminal and receiving end are needed signal in the process being wirelessly transferred
Frequency cable is connected to transmission unit, since IF cable length has differences, each transmitting terminal channel is caused to reach transmitting terminal antenna
When, the signal of transmitting terminal can not normal synchronized alignment.And transmitting terminal transmits signal generally by multichannel base band link, because
This, all base band links of transmitting terminal need mutually collaboration that could ensure that hair can be effectively performed in signal integrity by transmitting terminal
It send, the signal that otherwise multichannel base band link is respectively sent can generate the effect of superposition interference, so that signal serious distortion, communicates matter
Amount substantially reduces.To guarantee that multichannel base band link can ensure that the high-quality quality fidelity of signal transmission, transmitting terminal needs are adjusted
The coordination sending function of each road base band link.
For the sending function for coordinating each road base band link, the present embodiment by adjusting each road base band link link parameter,
Effectively adjust the transmission flow of different base band links in transmitting terminal.
Transmitting terminal can be with the parameter of each base band link of training frames mode adjustment.Multichannel base band link sends training frames, respectively
The presence of each road signal is detected between the signal of road by heartbeat signal.In the presence of the signal of multichannel base band link is equal, by mutually sending out
The physical frame parameters on each road are adjusted to identical by parameter information.Set when adjustment wherein any one road base band link as any base
Band link, using any base band link as benchmark road, other base band links carry out parameter adjustment on the basis of the first benchmark road.
Process is adjusted for convenience of comprehension parameter, is explained below by way of an example:
By taking mimo transmission system as an example, the mimo transmission system is adjusted base band link using training frame structure.
Referring to Fig.1, in the frame format of training frames: the n is the base band link number of transmitting terminal, and m is the base band link number of receiving end.I-th
In the training frames of road signal, training sequence i is used as the mark of location point, generally using having preferable autocorrelation and poor
The sequence of cross correlation characteristic, the training sequence in each road signal are orthogonal.The training sequence is sent in training frames
Default symbol, synchronization and channel estimation for receiving end.At the corresponding position of other non-i-th road training sequences, the training of the i-th tunnel
It is full nil symbol in frame, and has the protection of K full nil symbols between training sequence i and training sequence i-1 and training sequence i+1
Band.Buffered data when the full nil symbol is used for as by the Signal averaging of base band link, prevents signal interference and letter
Number distortion the phenomenon that.The protection band of this K full nil symbols is to still ensure that the training on each road when each road MIMO is misaligned
Training sequence in frame is not by the interference of other road signals, and therefore, deviant is estimated in the symbol lengths of protection band and receiving end
Maximum value is related.The maximum value that the symbol lengths of protection band are more than or equal to receiving end estimation deviant can guarantee each road training frames
In training sequence not by the interference of other road signals.
Step S20, transmitting terminal are adjustment road, the frame structure parameter point based on adjustment road with any base band link adjusted
Other base band links are not calculated and adjust the time delay between road；
After adjusting by signal, transmitting terminal is using the adjustment that wherein any base band link all the way is calculated as chain-circuit time delay
Road calculates the high-speed transfer channel time delay for adjusting road to other each roadbed band signals.Calculation are as follows: the adjustment other each bases of road direction
Band link transmission link time-delay calculation signal, while opening counter, other each roads receive after directly by the hoop back to tune
Whole road.After adjustment road receives loopback signal, stop counting, count results are divided by the time delay that two be exactly one way link.Counter
Number is equal to signal number and subtracts one.It is convenient for the ease of subsequent descriptions, it is assumed that have the road N signal, the N-1 being calculated a unidirectional chains
The time delay on road is t1, t2 ..., tN-1, and the maximum value in t1, t2 ..., tN-1 is indicated with tmax.
Step S30, transmitting terminal is according to the time delay between every other base band link and adjustment road, to all base band links
Frame structure parameter carries out sign synchronization.
Transmitting terminal resets the baseband signal of each base band link, and after resetting release, baseband signal is first cached in memory,
It wouldn't export.Memory state information is actively sent to adjustment road by other base band links.Adjustment road receives other base band
After the memory state information that link transmits, it is cached in meeting other each base band links and the memory for adjusting road itself
After data, counter is opened.Counter is started counting from 0, and the value of counter be tmax-t1, tmax-t2 ...,
What transmission data started to export at the time of tmax-tN-1 is indicated to other roads N-1.Other base band links receive adjustment road and transmit
Data start output instruction after, start export memory in data.When counter counts are to tmax, adjustment road is opened
Begin to export the data in memory, so that the data of the output of transmitting terminal multistage baseband signal are to complete sign synchronization alignment
Process.
In technical solution of the present invention, transmitting terminal with any base band link be the first benchmark road, based on the first benchmark road
Frame structure parameter carries out the adjustment of frame structure parameter to other base band links of transmitting terminal respectively；Then transmitting terminal is with adjusted
One base band link be adjustment road, based on adjustment road frame structure parameter calculate separately other base band links and adjust road between when
Prolong；Last transmitting terminal joins the frame structure of all base band links according to the time delay between every other base band link and adjustment road
Number carries out sign synchronization.The present invention is mutually coordinated by carrying out the signal frame structure parameter of base band link, calculates different bases
Time delay with link carries out chain-circuit time delay adjustment, so that baseband signal can be in transmission process with effectively orderly
Ground is sent, and improves signal data efficiency of transmission, and then the communication quality of promotion signal adjustment system.
Further, it on the basis of the present invention is based on the symbol timing synchronization method first embodiment of transmitting terminal, proposes to be based on
The symbol timing synchronization method second embodiment of transmitting terminal, referring to Fig. 3, the difference between the second embodiment and first embodiment exists
In,
For the transmitting terminal with any base band link for the first benchmark road, the frame structure parameter based on the first benchmark road is right respectively
Other base band links of transmitting terminal carry out the step of frame structure parameter adjustment and include:
Step S11, transmitting terminal, for the first benchmark road, send the heart to other base band links of transmitting terminal with any base band link
Jump signal and parameter information；
There are multichannel base band links in transmitting terminal, in the present embodiment, using wherein any one road base band link as reference
Link is set as the first benchmark road, sends heartbeat signal and this base band chain to other base band links in addition to the base band link
The parameter information on road.The heartbeat signal is a kind of test signal, sends one very to another party of interconnection at regular intervals
Small data packet replys situation by other side and judges the whether already off method of the bipartite communication link of interconnection.Only
Have between base band link can normal communication can realize that time delay adjusts, and parameter information refers to the frame in the first benchmark road
Structural parameters, the adjustment reference frame as other base band links.Since the first benchmark road is multichannel base band link in transmitting terminal
Adjustment foundation, therefore, the first benchmark road needs to inform the parameter information of other base band links itself.
Step S12, transmitting terminal obtain other base band links and are sent to the first benchmark road based on heartbeat signal and parameter information
Target component information；
Step S13, First ray of the transmitting terminal based on target component information and the first benchmark road is in other base band links
The second sequence carry out symbol offset, to maintain the second sequence of First ray and other base band links phase in each base band link
Mutually it is staggered.
First other base band links of benchmark road direction send heartbeat signal and when parameter informations, other base band links also can be to the
One benchmark road sends heartbeat signal and parameter information.First benchmark road receives the target component information for obtaining other base band links.
The target component information refers to the frame structure information of other base band links, and transmitting terminal can be according to target component acquisition of information
To the training sequence in all base band links.Due to there is training sequence in different base band links, by the first benchmark road
In training sequence be set as First ray, set the second sequence for the training sequence in other base band links, and with first
Sequence can carry out symbol offset to the training sequence of other base band links as reference frame, so that First ray and the
Two sequences mutually stagger in each base band link.
It should be noted that the second sequence is a general designation, respective training sequence can be set in other base band links of multichannel
It is set to third sequence, the 4th sequence etc..The symbol offset processing of each training sequence makes each training sequence in respective base
With being in the state mutually staggered in link.
Further, it on the basis of the present invention is based on the symbol timing synchronization method second embodiment of transmitting terminal, proposes to be based on
The symbol timing synchronization method 3rd embodiment of transmitting terminal, referring to Fig. 4, the difference between the 3rd embodiment and second embodiment exists
In the transmitting terminal joins the frame structure of all base band links according to the time delay between every other base band link and adjustment road
Number carried out after the step of sign synchronization further include:
Step S40, transmitting terminal send calibration information to receiving end based on the base band link for completing sign synchronization, for receiving
End calculates symbol offset value；
Transmitting terminal needs to send calibration information to receiving end after completing the sign synchronization processing of each base band link.Cause
After carrying out sign synchronization processing transmitting terminal is orderly effectively sent for transmitting terminal when sending baseband signal, but connects
Receiving end needs the baseband signal sent for transmitting terminal to carry out adaptation adjustment, preferably to receive the base band of transmitting terminal transmission
Signal.The correction process of receiving end needs the reference of the signal data of transmitting terminal, therefore transmitting terminal completes sign synchronization processing
Need to send calibration information later to receiving end, so that receiving end calculates symbol offset value.The symbol offset value is receiving end
Data Detection value based on the calibration information received can be used as the reference data that baseband signal is further finely tuned.
Step S50, the time delay for symbol offset value adjustment all base band links of transmitting terminal that transmitting terminal is fed back according to receiving end.
After transmitting terminal sends calibration information, receiving end can reply the symbol offset value relative to calibration information, to send out
The delay time signal of sending end adjustment base band link.Since transmitting terminal is handled by sign synchronization, therefore all base band links can be real
Existing baseband signal alignment is sent, and symbol offset value is to be adjusted again on sign synchronization treated base band link, therefore send out
All base band links of sending end may be staggered again.Be not in each roadbed band signal for the information of Support Training sequence
The phenomenon that overlapping interference, therefore the protection strip length of full nil symbol will be greater than the symbol offset maximum value of base band link.
Further, it on the basis of the present invention is based on the symbol timing synchronization method 3rd embodiment of transmitting terminal, proposes to be based on
The symbol timing synchronization method fourth embodiment of transmitting terminal, referring to Fig. 5, the difference between the fourth embodiment and 3rd embodiment exists
Before in the time delay for symbol offset value adjustment all base band links of transmitting terminal that, the transmitting terminal is fed back according to receiving end the step of
Further include:
Step S60, transmitting terminal detect the symbol offset value whether all base band links all receive receiving end feedback；
Adjust transmitting terminal in all base band links when be delayed, therefore, to assure that all base band links can in transmitting terminal
It is completely received the symbol offset value of receiving end feedback.Since the overlapping of baseband signal is with the signal overlap of multichannel base band link
It generates, therefore each road base band link is required to accurately to be finely tuned.Only symbol is received in each road base band link
When number deviant, just can be carried out it is uniformly coordinated, once otherwise wherein base band link is not received by symbol offset value and causes all the way
Leakage has been adjusted all the way during adjustment, then may be because that no fine alignment leads to multichannel baseband signal by the base band link that leakage is adjusted
After overlapping, there is distortion interference phenomenon, to influence communication quality.
Step S70, when all base band links of transmitting terminal do not receive the symbol offset value of receiving end feedback all, again
Obtain the symbol offset value of receiving end feedback.
Assuming that transmitting terminal, which detects in all base band links, does not at least receive symbol offset value in the presence of base band link all the way,
So transmitting terminal will reacquire the symbol offset value that receiving end is fed back.Here the symbol offset value that receiving end is fed back can be with
It is the symbol offset value for the base band link being missed, is also possible to the symbol offset value of whole base band links, it can be according to practical feelings
Condition is configured adjustment, and the present embodiment preferably reacquires the symbol offset value of all base band links of receiving end feedback.
Further, it on the basis of the present invention is based on the symbol timing synchronization method fourth embodiment of transmitting terminal, proposes to be based on
The 5th embodiment of symbol timing synchronization method of transmitting terminal, referring to Fig. 6, the difference between the 5th embodiment and fourth embodiment exists
It is wrapped in the step of, time delay of symbol offset value that the transmitting terminal is fed back according to receiving end adjustment all base band links of transmitting terminal
It includes:
Step S51, transmitting terminal obtain all symbol offset values of receiving end feedback, and all symbol offset values are mapped to
Corresponding base band link；
Transmitting terminal receives all symbol offset values for obtaining receiving end feedback, and with each roadbed band chain in symbol offset value
The encoded information on road, therefore it is the offset for which base band link that transmitting terminal, which can accurately differentiate each symbol offset value,
Value, that is to say, that symbol offset value can be corresponded to the base band link for specifically needing to carry out symbol offset by transmitting terminal.For example,
Transmitting terminal receives 3 symbol offset values A, B and C, and described A, B and C include corresponding base band link, because of symbol
Deviant is that the calibration information sent according to each base band link calculates.
Step S52, time delay of the transmitting terminal based on symbol offset value and all corresponding base band links of default error transfer factor, institute
State the default error delay variation error that data communication generates between each base band branch.
In transmitting terminal, each base band link may cause due to the difference between hardware, route, specification or interference effect
It handles adjustment effect and not necessarily meets extremely fine process, to delay variation phenomenon occur.Therefore, it is set in the present embodiment
A default error is set, the tolerance as the base band link because sign synchronization alignment can not be carried out completely.Transmitting terminal root
According to symbol offset value and default error, the common time delay for adjusting base band link, default error can ensure each base band branch non-
In the case that perfection carries out sign synchronization alignment, the transmission of baseband signal is still within controlled range, and does not influence to communicate
The transmission of signal, to ensure higher communication quality.
Further, it on the basis of the present invention is based on five embodiment of symbol timing synchronization method of transmitting terminal, proposes to be based on
The symbol timing synchronization method sixth embodiment of transmitting terminal, referring to Fig. 7, the difference between the sixth embodiment and the 5th embodiment exists
In, the transmitting terminal is in training frames adjustment modes,
The step of the time delay for symbol offset value adjustment all base band links of transmitting terminal that the transmitting terminal is fed back according to receiving end
After rapid further include:
Base band link is switched to data frame sending mode by training frames adjustment modes by step S80, transmitting terminal, and by data
Frame sending mode is synchronized to receiving end.
The training frames adjustment modes, which refer to, carries out sign synchronization alignment and baseband signal tune for base band link with training frames
Whole mode.The data frame sending mode is the mode for normally being sent baseband signal.When transmitting terminal is in training frames
Adjustment modes, rather than be in normal data frames sending mode when, if transmitting terminal complete time delay adjustment after, not by training frames
Adjustment modes are switched to data frame sending mode, then each road base band link will continue to carry out data hair in the form of training frames
Send, and training frames as adjustment communication signal prescribed form, transmitted by baseband signal do not have real meaning, no Faville
Hold normal communication function.Therefore transmitting terminal, which needs to have base band link training frames adjustment modes to be switched to data frame, sends mould
Formula, meanwhile, after transmitting terminal is switched to data frame sending mode, receiving end does not need to maintain training frames adjustment modes yet, as long as hair
Sending end is switched to data frame sending mode, and the data frame sending mode of transmitting terminal can be synchronized in receiving end.
The present invention also provides a kind of symbol timing synchronization methods based on receiving end, in the symbol timing synchronization method based on receiving end
In one embodiment, referring to Fig. 8, the symbol timing synchronization method based on receiving end includes:
Step S90, receiving end receive the calibration information for all base band links that transmitting terminal is sent；
Receiving end receives the calibration information of each road base band link overlapping synthesis of transmitting terminal transmission.Due to the base of receiving end
With link probably due to the influence of the uncontrollable factors such as hardware, carrier specification leads to the receive process disunity of baseband signal, into
And calibration information distortion can not be received completely, to ensure that each road base band link of receiving end can normally receive accurately
Baseband signal, calibration information will calculate the important referential data of symbol offset value as receiving end.
Step S100, receiving end, for the second benchmark road, and calculate separately other according to calibration information with any base band link
The symbol offset value of base band link and the second benchmark road；
Symbol offset value is fed back to corresponding base band link in transmitting terminal by step S110, receiving end.
With base band link any in receiving end for the second benchmark road, according to the calibration information that each road base band link receives,
Calculate separately the symbol offset value of each road base band link and the second benchmark road.Symbol offset value can be according to the reception of calibration information
The delay or symbol occurred in the process is asynchronous, carries out signal correction, and amendment form is that the base band link of corresponding transmitting terminal needs
Adjusting how many time delay could complete accurately to receive.I.e. the calculating correcting mode of receiving end is to be connect according to receiving end to calibration information
Receipts situation, the anti-explicit value released transmitting terminal and need to carry out time delay or time advance, can be represented in the form of sign
Time delay and time advance.For example, base band link, which needs to increase time delay according to calculated result acquisition, still reduces time delay.If
Calculated result is N number of symbol fastly than benchmark road, then proves that this road base band link of transmitting terminal needs to increase the time delay of N number of symbol；
If calculated result is N number of symbol slowly than benchmark road, prove that this road of transmitting terminal needs to reduce the time delay of N number of symbol.N can be with
Sampling multiple for integer or score, specific precision data used in estimation of deviation determines.
After obtaining symbol offset value, which is passed through multichannel corresponding to respective calibration information by receiving end
Base band link original road feeds back to the base band link of transmitting terminal, so that transmitting terminal carries out time delay adjustment according to symbol offset value.
Further, it on the basis of the present invention is based on the symbol timing synchronization method first embodiment of receiving end, proposes to be based on
The symbol timing synchronization method second embodiment of receiving end, the difference between the second embodiment and first embodiment is, described
Symbol offset value is calculated according to the error deviation during the symbol offset and symbol transmission of the calibration information of base band link and is obtained.
Calibration information is sent by the base band link of transmitting terminal, via middle frequency link, analog device and space link etc.
True carrier or virtual carrier, it may occur that certain signal offset, therefore, the calibration information of acquisition, in the receiving end there is also
Certain data symbol offset.Therefore, in reality scene, the calculating of symbol offset value is needed to need to consider base band link itself
Hardware sends deviation generation symbol offset, it is also desirable to consider symbol offset factor of the base band link in transmission process.Pass through
Increase the modes such as detector sensor, the correlative factor for generating symbol deviation can be subjected to quantification treatment, form quantized data,
To which the error deviation during the symbol offset and symbol transmission of calibration information is quantified as parameter, calculate by algorithm
It obtains.
0, Figure 10 is the device structure schematic diagram for the hardware running environment that present invention method is related to referring to Fig.1.
The terminal of that embodiment of the invention can be PC, be also possible to smart phone, tablet computer, E-book reader, MP3
(Moving Picture Experts Group Audio Layer III, dynamic image expert's compression standard audio level 3)
Player, MP4 (Moving Picture Experts Group Audio Layer IV, dynamic image expert's compression standard sound
Frequency level 3) terminal devices such as player, portable computer.
As shown in Figure 10, signal adjustment system may include: processor 1001, such as CPU, memory 1005, communication
Bus 1002.Wherein, communication bus 1002 is for realizing the connection communication between processor 1001 and memory 1005.Memory
1005 can be high speed RAM memory, be also possible to stable memory (non-volatile memory), such as disk is deposited
Reservoir.Memory 1005 optionally can also be the storage device independently of aforementioned processor 1001.
Optionally, signal adjustment system can also include user interface, network interface, camera, RF (Radio
Frequency, radio frequency) circuit, sensor, voicefrequency circuit, WiFi module etc..User interface may include display screen
(Display), input unit such as keyboard (Keyboard), optional user interface can also include wireline interface, the nothing of standard
Line interface.Network interface optionally may include standard wireline interface and wireless interface (such as WI-FI interface).
It will be understood by those skilled in the art that structure pair signals do not adjust the adjustment of signal shown in Figure 10 system structure
The restriction of system may include perhaps combining certain components or different component cloth than illustrating more or fewer components
It sets.
As shown in Figure 10, as may include operating system, network in a kind of memory 1005 of computer storage medium
Communication module and sign synchronization program.Operating system is to manage and control the journey of signal adjustment system hardware and software resource
Sequence supports the operation of sign synchronization program and other softwares and/or program.Network communication module is for realizing memory 1005
Communication between internal each component, and communicated between other hardware and softwares in signal adjustment system.
The embodiment of the present invention provides a kind of signal adjustment system, and the signal adjustment system includes transmitting terminal and receiving end,
Referring to Fig. 9, the signal adjustment system includes transmitting terminal and receiving end, and the transmitting terminal includes:
The first adjustment module 10 is used for any base band link as the first benchmark road, the frame structure based on the first benchmark road
Parameter carries out the adjustment of frame structure parameter to other base band links of transmitting terminal respectively；
In transceiver communication device, transmitting terminal and receiving end are needed signal in the process being wirelessly transferred
Frequency cable is connected to transmission unit, since IF cable length has differences, each transmitting terminal channel is caused to reach transmitting terminal antenna
When, the signal of transmitting terminal can not normal synchronized alignment.And transmitting terminal transmits signal generally by multichannel base band link, because
This, all base band links of transmitting terminal need mutually collaboration that could ensure that hair can be effectively performed in signal integrity by transmitting terminal
It send, the signal that otherwise multichannel base band link is respectively sent can generate the effect of superposition interference, so that signal serious distortion, communicates matter
Amount substantially reduces.To guarantee that multichannel base band link can ensure that the high-quality quality fidelity of signal transmission, transmitting terminal needs are adjusted
The coordination sending function of each road base band link.
For the sending function for coordinating each road base band link, the present embodiment by adjusting each road base band link link parameter,
Effectively adjust the transmission flow of different base band links in transmitting terminal.
Transmitting terminal can be with the parameter of each base band link of training frames mode adjustment.Multichannel base band link sends training frames, respectively
The presence of each road signal is detected between the signal of road by heartbeat signal.In the presence of the signal of multichannel base band link is equal, by mutually sending out
The physical frame parameters on each road are adjusted to identical by parameter information.Set when adjustment wherein any one road base band link as any base
Band link, using any base band link as benchmark road, other base band links carry out parameter adjustment on the basis of the first benchmark road.
Process is adjusted for convenience of comprehension parameter, is explained below by way of an example:
By taking mimo transmission system as an example, the mimo transmission system is adjusted base band link using training frame structure.
Referring to Fig.1, in the frame format of training frames: the n is the base band link number of transmitting terminal, and m is the base band link number of receiving end.I-th
In the training frames of road signal, training sequence i is used as the mark of location point, generally using having preferable autocorrelation and poor
The sequence of cross correlation characteristic, the training sequence in each road signal are orthogonal.The training sequence is sent in training frames
Default symbol, synchronization and channel estimation for receiving end.At the corresponding position of other non-i-th road training sequences, the training of the i-th tunnel
It is full nil symbol in frame, and has the protection of K full nil symbols between training sequence i and training sequence i-1 and training sequence i+1
Band.Buffered data when the full nil symbol is used for as by the Signal averaging of base band link, prevents signal interference and letter
Number distortion the phenomenon that.The protection band of this K full nil symbols is to still ensure that the training on each road when each road MIMO is misaligned
Training sequence in frame is not by the interference of other road signals, and therefore, deviant is estimated in the symbol lengths of protection band and receiving end
Maximum value is related.The maximum value that the symbol lengths of protection band are more than or equal to receiving end estimation deviant can guarantee each road training frames
In training sequence not by the interference of other road signals.
First computing module 20, for being adjustment road, the frame structure based on adjustment road with any base band link adjusted
Parameter calculates separately other base band links and adjusts the time delay between road；
After adjusting by signal, transmitting terminal is using the adjustment that wherein any base band link all the way is calculated as chain-circuit time delay
Road calculates the high-speed transfer channel time delay for adjusting road to other each roadbed band signals.Calculation are as follows: the adjustment other each bases of road direction
Band link transmission link time-delay calculation signal, while opening counter, other each roads receive after directly by the hoop back to tune
Whole road.After adjustment road receives loopback signal, stop counting, count results are divided by the time delay that two be exactly one way link.Counter
Number is equal to signal number and subtracts one.It is convenient for the ease of subsequent descriptions, it is assumed that have the road N signal, the N-1 being calculated a unidirectional chains
The time delay on road is t1, t2 ..., tN-1, and the maximum value in t1, t2 ..., tN-1 is indicated with tmax.
Synchronization module 30, for according to every other base band link and adjustment road between time delay, to all base band links
Frame structure parameter carry out sign synchronization.
Transmitting terminal resets the baseband signal of each base band link, and after resetting release, baseband signal is first cached in memory,
It wouldn't export.Memory state information is actively sent to adjustment road by other base band links.Adjustment road receives other base band
After the memory state information that link transmits, it is cached in meeting other each base band links and the memory for adjusting road itself
After data, counter is opened.Counter is started counting from 0, and the value of counter be tmax-t1, tmax-t2 ...,
What transmission data started to export at the time of tmax-tN-1 is indicated to other roads N-1.Other base band links receive adjustment road and transmit
Data start output instruction after, start export memory in data.When counter counts are to tmax, adjustment road is opened
Begin to export the data in memory, so that the data of the output of transmitting terminal multistage baseband signal are to complete sign synchronization alignment
Process.
Sending module 40, for sending calibration information to receiving end based on the base band link for completing sign synchronization；
Transmitting terminal needs to send calibration information to receiving end after completing the sign synchronization processing of each base band link.Cause
After carrying out sign synchronization processing transmitting terminal is orderly effectively sent for transmitting terminal when sending baseband signal, but connects
Receiving end needs the baseband signal sent for transmitting terminal to carry out adaptation adjustment, preferably to receive the base band of transmitting terminal transmission
Signal.The correction process of receiving end needs the reference of the signal data of transmitting terminal, therefore transmitting terminal completes sign synchronization processing
Need to send calibration information later to receiving end, so that receiving end calculates symbol offset value.The symbol offset value is receiving end
Data Detection value based on the calibration information received can be used as the reference data that baseband signal is further finely tuned.
Second adjustment module 50, the symbol offset value for being fed back according to receiving end adjust all base band links of transmitting terminal
Time delay；
After transmitting terminal sends calibration information, receiving end can reply the symbol offset value relative to calibration information, to send out
The delay time signal of sending end adjustment base band link.Since transmitting terminal is handled by sign synchronization, therefore all base band links can be real
Existing baseband signal alignment is sent, and symbol offset value is to be adjusted again on sign synchronization treated base band link, therefore send out
All base band links of sending end may be staggered again.Be not in each roadbed band signal for the information of Support Training sequence
The phenomenon that overlapping interference, therefore the protection strip length of full nil symbol will be greater than the symbol offset maximum value of base band link.
The receiving end includes:
Receiving module 60, the calibration information of all base band links for receiving transmitting terminal transmission；
Adjust transmitting terminal in all base band links when be delayed, therefore, to assure that all base band links can in transmitting terminal
It is completely received the symbol offset value of receiving end feedback.Since the overlapping of baseband signal is with the signal overlap of multichannel base band link
It generates, therefore each road base band link is required to accurately to be finely tuned.Only symbol is received in each road base band link
When number deviant, just can be carried out it is uniformly coordinated, once otherwise wherein base band link is not received by symbol offset value and causes all the way
Leakage has been adjusted all the way during adjustment, then may be because that no fine alignment leads to multichannel baseband signal by the base band link that leakage is adjusted
After overlapping, there is distortion interference phenomenon, to influence communication quality.
Second computing module 70 is used for any base band link as the second benchmark road, and is calculated separately according to calibration information
The symbol offset value of other base band links and the second benchmark road；
Assuming that transmitting terminal, which detects in all base band links, does not at least receive symbol offset value in the presence of base band link all the way,
So transmitting terminal will reacquire the symbol offset value that receiving end is fed back.Here the symbol offset value that receiving end is fed back can be with
It is the symbol offset value for the base band link being missed, is also possible to the symbol offset value of whole base band links, it can be according to practical feelings
Condition is configured adjustment, and the present embodiment preferably reacquires the symbol offset value of all base band links of receiving end feedback.
Feedback module 80, for symbol offset value to be fed back to corresponding base band link in transmitting terminal.
The training frames adjustment modes, which refer to, carries out sign synchronization alignment and baseband signal tune for base band link with training frames
Whole mode.The data frame sending mode is the mode for normally being sent baseband signal.When transmitting terminal is in training frames
Adjustment modes, rather than be in normal data frames sending mode when, if transmitting terminal complete time delay adjustment after, not by training frames
Adjustment modes are switched to data frame sending mode, then each road base band link will continue to carry out data hair in the form of training frames
Send, and training frames as adjustment communication signal prescribed form, transmitted by baseband signal do not have real meaning, no Faville
Hold normal communication function.Therefore transmitting terminal, which needs to have base band link training frames adjustment modes to be switched to data frame, sends mould
Formula, meanwhile, after transmitting terminal is switched to data frame sending mode, receiving end does not need to maintain training frames adjustment modes yet, as long as hair
Sending end is switched to data frame sending mode, and the data frame sending mode of transmitting terminal can be synchronized in receiving end.
The specific embodiment and each embodiment of above-mentioned symbol timing synchronization method of signal adjustment system of the present invention are essentially identical,
This is repeated no more.
The present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has one
Perhaps more than one program the one or more programs can also be executed by one or more than one processor with
For:
Transmitting terminal is with any base band link for the first benchmark road, and the frame structure parameter based on the first benchmark road is respectively to transmission
Other base band links at end carry out the adjustment of frame structure parameter；
Transmitting terminal is adjustment road with any base band link adjusted, and the frame structure parameter based on adjustment road calculates separately it
Time delay between his base band link and adjustment road；
Transmitting terminal joins the frame structure of all base band links according to the time delay between every other base band link and adjustment road
Number carries out sign synchronization.
Computer readable storage medium specific embodiment of the present invention and above-mentioned symbol timing synchronization method and signal adjust system
Each embodiment is essentially identical, and details are not described herein.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, computer, clothes
Business device, air conditioner or the network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of symbol timing synchronization method based on transmitting terminal, which is characterized in that the symbol timing synchronization method packet based on transmitting terminal
It includes:
Transmitting terminal is with any base band link for the first benchmark road, and the frame structure parameter based on the first benchmark road is respectively to transmitting terminal
Other base band links carry out the adjustment of frame structure parameter；
Transmitting terminal is adjustment road with any base band link adjusted, and the frame structure parameter based on adjustment road calculates separately other bases
With the time delay between link and adjustment road；
Transmitting terminal according to the time delay between every other base band link and adjustment road, to the frame structure parameters of all base band links into
Row sign synchronization.
2. as described in claim 1 based on the symbol timing synchronization method of transmitting terminal, which is characterized in that the transmitting terminal is with any base
Band link is the first benchmark road, and the frame structure parameter based on the first benchmark road carries out frame to other base band links of transmitting terminal respectively
Structural parameters adjust the step of include:
Transmitting terminal, for the first benchmark road, sends heartbeat signal and parameter to other base band links of transmitting terminal with any base band link
Information；
Transmitting terminal obtains the target component letter that other base band links are sent to the first benchmark road based on heartbeat signal and parameter information
Breath；
First ray of the transmitting terminal based on target component information and the first benchmark road to the second sequence in other base band links into
Row symbol offset, to maintain First ray and the second sequence of other base band links to mutually stagger in each base band link.
3. as described in claim 1 based on the symbol timing synchronization method of transmitting terminal, which is characterized in that the transmitting terminal is according to all
Time delay between other base band links and adjustment road, the step of sign synchronization is carried out to the frame structure parameters of all base band links it
Afterwards further include:
Transmitting terminal sends calibration information to receiving end based on the base band link for completing sign synchronization, so that receiving end calculating symbol is inclined
Shifting value；
The time delay for symbol offset value adjustment all base band links of transmitting terminal that transmitting terminal is fed back according to receiving end.
4. as claimed in claim 3 based on the symbol timing synchronization method of transmitting terminal, which is characterized in that the transmitting terminal is according to reception
Before the step of time delay of symbol offset value adjustment all base band links of transmitting terminal of end feedback further include:
Transmitting terminal detects the symbol offset value whether all base band links all receive receiving end feedback；
When all base band links of transmitting terminal do not receive the symbol offset value of receiving end feedback all, it is anti-to reacquire receiving end
The symbol offset value of feedback.
5. as claimed in claim 3 based on the symbol timing synchronization method of transmitting terminal, which is characterized in that the transmitting terminal is according to reception
End feedback symbol offset value adjustment all base band links of transmitting terminal time delay the step of include:
Transmitting terminal obtains all symbol offset values of receiving end feedback, and all symbol offset values are mapped to corresponding base band chain
Road；
Time delay of the transmitting terminal based on symbol offset value and all corresponding base band links of default error transfer factor, the default error are
The delay variation error that data communication generates between each base band branch.
6. as claimed in claim 3 based on the symbol timing synchronization method of transmitting terminal, which is characterized in that the transmitting terminal is in training
Framing control mode,
The step of time delay for symbol offset value adjustment all base band links of transmitting terminal that the transmitting terminal is fed back according to receiving end it
Afterwards further include:
Base band link is switched to data frame sending mode by training frames adjustment modes by transmitting terminal, and data frame sending mode is same
It walks to receiving end.
7. a kind of symbol timing synchronization method based on receiving end, which is characterized in that the symbol timing synchronization method packet based on receiving end
It includes:
Receiving end receives the calibration information for all base band links that transmitting terminal is sent；
Receiving end, for the second benchmark road, and calculates separately other base band links and second according to calibration information with any base band link
The symbol offset value on benchmark road；
Symbol offset value is fed back to corresponding base band link in transmitting terminal by receiving end.
8. as claimed in claim 7 based on the symbol timing synchronization method of receiving end, which is characterized in that the symbol offset value according to
The symbol offset of the calibration information of base band link and the error deviation during symbol transmission are calculated and are obtained.
9. a kind of signal adjusts system, which is characterized in that the signal adjustment system includes transmitting terminal and receiving end, the transmission
End includes:
The first adjustment module, for, for the first benchmark road, the frame structure parameter based on the first benchmark road to be divided with any base band link
Other other base band links to transmitting terminal carry out the adjustment of frame structure parameter；
First computing module, for being adjustment road, the frame structure parameter point based on adjustment road with any base band link adjusted
Other base band links are not calculated and adjust the time delay between road；
Synchronization module, for according to every other base band link and adjustment road between time delay, to the frame knot of all base band links
Structure parameter carries out sign synchronization.
Sending module, for sending calibration information to receiving end based on the base band link for completing sign synchronization；
Second adjustment module, the time delay of symbol offset value adjustment all base band links of transmitting terminal for being fed back according to receiving end；
The receiving end includes:
Receiving module, the calibration information of all base band links for receiving transmitting terminal transmission；
Second computing module is used for any base band link as the second benchmark road, and calculates separately other bases according to calibration information
Symbol offset value with link and the second benchmark road；
Feedback module, for symbol offset value to be fed back to corresponding base band link in transmitting terminal.
10. a kind of computer readable storage medium, which is characterized in that it is same to be stored with symbol on the computer readable storage medium
Program is walked, is realized when the sign synchronization program is executed by processor as described in any one of claims 1 to 6 based on transmission
The step of symbol timing synchronization method described in any one of the symbol timing synchronization method at end and claim 7 to 8 based on receiving end.
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