CN103152815B - Improved digital private mobile radio (dPMR) delay access method and device - Google Patents
Improved digital private mobile radio (dPMR) delay access method and device Download PDFInfo
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Abstract
The invention discloses an improved digital private mobile radio (dPMR) delay access method and a device. The method comprises that A, first frame data are received; B, moving correlation processing is carried out for the first frame data to obtain correlation values, and whether correlation values larger than set threshold values exist or not is judged, if the correlation values larger than the set threshold values exist, then the method enters a step C, and if not, the method returns to a step A; C, second frame data are received, correlation values larger than the threshold values and corresponding synchronous positions of the correlation values are recorded; D, moving correlation processing is carried out for the second frame data to obtain correlation values, and whether correlation values larger than set threshold values exist or not is judged, if the correlation values larger than the set threshold values exist, then the method enters a step E, and if not, the method returns to a step A; E, correlation values larger than the set threshold values and corresponding synchronous positions of the correlation values are recorded; F, whether gaps of the synchronous positions corresponding to the correlation values recorded in the step C and gaps of the synchronous positions corresponding to the correlation values recorded in the step E are in set ranges or not is compared, if the gaps are in the ser ranges, the method enters a step G, and if not, the second frame data serve as the first frame data, and then the method returns the step C; and G, synchronous access is carried out.
Description
Technical field
The present invention relates to communication technical field, the dPMR particularly relating to a kind of improvement postpones cut-in method and device.
Background technology
Digital Clustering mobile communication system is one of Hot spots for development of moving communicating field, have and continue soon, the advantages such as networking flexibility, are mainly used in the dedicated mobile communications subsystem such as production scheduling, command & control, raising is produced and operating efficiency, ensure safe etc. significant.
DPMR (Digital Private Mobile Radio numeral private mobile radio) intercom is as a kind of digital intercom machine technology ground application such as in Europe widely of maturation.Its frame structure has four kinds, is respectively load frames, superframe, head frame and tail frame four kinds.As shown in Figure 1,1 superframe comprises 4 radio frames to the structure of each superframe, and each radio frames is 80ms.Front 12 symbols of each radio frames and 24bit are Fs2 (FrameSync2 frame synchronization 2) or CC (Colour Code colour coding).And superframe the 1st, 24bit is frame synchronization 2 before 3 radio frames, the 2nd of superframe the, the front 24bit of 4 radio frames is colour coding.
Postpone the typical apply technology that access (late entry) is dPMR equipment.Postpone access, namely just access after communication process starts a period of time.The existing Access Algorithm postponing access utilizes a kind of synchronizing sequence (Fs2 or CC) synchronously to access usually.Basic access process is as shown in Figure 2:
Step S201, digital handset receives 1 frame data.
Step S202, Fs2 or CC self stored and the data received are carried out slip relevant treatment by digital handset, obtain each correlation slided by process.
Step S203, judges whether the digital handset maximum related value selected in the correlation obtained through slip relevant treatment is greater than the threshold value of setting, if be greater than threshold value, then enters step S204; Otherwise return step S201.
Step S204, synchronous access from the sync bit that maximum related value is corresponding.
Existing algorithm utilizes Fs2 or CC as synchronizing sequence usually.The length of Fs2 or CC only has 24bit (bit), when using FS2 or CC of 24bit to carry out slip relevant treatment, because character length is shorter, auto-correlation and cross correlation are not ideal, especially under the scene that signal to noise ratio is lower due to the pseudo-random characteristics of noise and the randomness of other business datum that may exist, comparatively serious void inspection (i.e. the access of mistake) or undetected (not detecting when access message namely should be detected) can be produced, make the correctness of synchronous access detection and noise immunity all lower.This situation affects when radio-frequency channel is nonideal can be more obvious, such as because dPMR adopts 4FSK frequency modulation, the difference of the locking frequency deviation that the unsteadiness of receiving terminal or transmitting terminal VCO (voltage controlled oscillator) causes can become unstable DC quantity after receiving terminal frequency discrimination, and the correlation that the existence of this situation can affect Fs2 or CC more compares.
Summary of the invention
The dPMR that the invention provides improvement postpones cut-in method, solves the situation only utilizing a kind of synchronizing sequence to carry out there will be when synchronous access detects empty inspection, and judges whether the data received are correlated with and find sync bit more accurately.
Method of the present invention is that the dPMR improved postpones cut-in method, and the method comprises:
A, receive at least one wireless frame data as the first frame data;
B, the first frame data and the first synchronizing sequence are carried out slip relevant treatment obtain multiple correlation, and judge the correlation that whether there is the threshold value being greater than setting in described multiple correlation, if existed, then enter step C; If there is no, then steps A is returned;
C, continue at least one wireless frame data after reception first frame data as the second frame data, and record that the first frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof;
D, the second frame data and the second synchronizing sequence are carried out slip relevant treatment obtain multiple correlation, and whether there is the correlation of the threshold value being greater than setting in multiple correlation described in determining step D, if existed, then enter step e; If there is no, then steps A is returned;
E, record that the second frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof;
The interval of the sync bit that the correlation recorded in F, comparison step C and step e is corresponding, whether in the scope of setting, if had, then enters step G; Otherwise, using the second frame data after the first frame data, return step C;
G, sync bit corresponding to correlation obtained by the first frame data from pairwise correlation value perform synchronous access.
Step C comprises further:
Record first frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, the correlation carrying out the first frame data and the first synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains the threshold value of setting sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to the number N of setting, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then record the sync bit of top n correlation and correspondence thereof;
Step e comprises further:
Record second frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, the correlation carrying out the first frame data and the first synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains setting thresholding sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to N, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then according to the sync bit of size order recording top n correlation and correspondence thereof.
The scope of described setting is that a radio frames subtracts half symbols to radio frames and adds half symbols.
If the first synchronizing sequence is frame synchronization 2Fs2, the second synchronizing sequence is colour coding CC; If the first synchronizing sequence is colour coding CC, then the second synchronizing sequence is frame synchronization 2Fs2.
Present invention also offers a kind of device, this device comprises:
First receiver module, for receiving at least one wireless frame data as the first frame data; Obtain when judgement first frame data carry out slip relevant treatment the correlation that there is not the threshold value being greater than setting in multiple correlation, then receive at least one wireless frame data as the first frame data; Obtain when judgement second frame data carry out slip relevant treatment the correlation that there is not the threshold value being greater than setting in multiple correlation, then receive at least one wireless frame data as the first frame data;
Slip related process module, obtain multiple correlation for the first frame data and the first synchronizing sequence are carried out slip relevant treatment, and judge that the first frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation; Second frame data and the second synchronizing sequence are carried out slip relevant treatment and obtains multiple correlation, and judge that the second frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation;
Logging modle, after judging that the first frame data and the first synchronizing sequence self stored carry out there is the correlation of the threshold value being greater than setting in the correlation that slip relevant treatment obtains, that records that the first frame data carry out the acquisition of slip relevant treatment is greater than the correlation of threshold value and the sync bit of correspondence thereof; After judging that the second frame data and the second synchronizing sequence self stored carry out there is the correlation of the threshold value being greater than setting in the correlation that slip relevant treatment obtains, that records that the second frame data carry out the acquisition of slip relevant treatment is greater than the correlation of threshold value and the sync bit of correspondence thereof;
Second receiver module, for receiving at least one wireless frame data as the second frame data; When judging that the second frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation;
Sync bit comparison module, the sync bit that the correlation of threshold value and the sync bit of correspondence and the second frame data thereof carry out the correlation and correspondence thereof that are greater than threshold value of slip relevant treatment acquisition that is greater than for the first frame data of logging modle record being carried out the acquisition of slip relevant treatment compares, if be interposed between in the scope of setting between the sync bit that pairwise correlation value is corresponding, then from pairwise correlation value, perform synchronous access by the sync bit that the correlation of the first frame data acquisition is corresponding.
The correlation of described logging modle also for carrying out the first frame data and the first synchronizing sequence to be greater than in correlation that slip relevant treatment obtains the threshold value of setting sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to the number N of setting, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then record the sync bit of top n correlation and correspondence thereof;
The correlation carrying out the second frame data and the second synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains setting thresholding sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to N, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then according to the sync bit of size order recording top n correlation and correspondence thereof.
The scope of described setting is that a radio frames subtracts half symbols to radio frames and adds half symbols.
If the first synchronizing sequence is frame synchronization 2Fs2, the second synchronizing sequence is colour coding CC; If the first synchronizing sequence is colour coding CC, then the second synchronizing sequence is frame synchronization 2Fs2.
Scheme provided by the invention, a kind of synchronizing sequence is first utilized to carry out slip relevant treatment to the data received, and obtain and be greater than sync bit corresponding to the correlation record of threshold value, receive data again and utilize another kind of synchronizing sequence to carry out slip relevant treatment to the data received, and obtaining and be greater than sync bit corresponding to the correlation record of threshold value.The correlation obtained twice compares between two, if between the time interval setting scope in, then can determine synchronous position and start synchronous access.Adopt scheme provided by the invention to carry out synchronous detection and access correctness and the noise immunity that can improve detection, empty inspection and undetected probability can be reduced significantly, improving product performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of superframe in prior art of the present invention;
Fig. 2 is art methods flow chart of the present invention;
Fig. 3 is the method flow diagram of the embodiment of the present invention;
Fig. 4 is the apparatus structure schematic diagram of the embodiment of the present invention.
Embodiment
Whether, in order to easily there is the situation of mistake when solving and only utilize a kind of synchronizing sequence synchronously to detect, reach the data judging more accurately to receive and be correlated with and find the object of sync bit, as shown in Figure 3, the delay access scheme of the embodiment of the present invention is:
Step S301, receives at least one wireless frame data as the first frame data.
Postpone access technology refer to from a superframe certain point receive data, have four radio frames in a superframe, so at least need reception one radio frames guarantee to comprise Fs2 or CC complete in each radio frames.Because radio frames each in dPMR system is 80ms, so the data of 80ms at least should be received in dPMR system.But in order to ensure to comprise complete Fs2 or CC in each data received, then the data received are at least 85ms, and can also add certain redundancy on the basis of 85ms according to actual conditions.
Step S302, first frame data and the first synchronizing sequence are carried out slip relevant treatment and obtains correlation, and judge the first frame data carry out whether existing in the correlation of slip relevant treatment acquisition the correlation of the threshold value being greater than setting, if existed, then enter step S303; If there is no, then step S301 is returned.
The data received are carried out with synchronous the first synchronizing sequence contrasted that is used for stored in device the correlation that slip relevant treatment refers to data and the first synchronizing sequence obtaining and receive, and after often obtaining a correlation, all the data received once are slided, then continue the correlation obtaining the data after sliding and the first synchronizing sequence.So just can obtain multiple correlation.In the multiple correlations obtained, judge whether the correlation being greater than threshold value.If be not greater than the correlation of threshold value, then illustrate and do not detect accessible sync bit, therefore need the flow process restarting the present embodiment, again receive data.
Step S303, continues at least one wireless frame data after reception first frame data as the second frame data, and record that the first frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof.
If judge there is the correlation being greater than threshold value in the correlation of the first frame data and the first synchronizing sequence, then continue reception second frame data and judge, and the sync bit of the correlation and correspondence thereof that are greater than threshold value is all recorded.The second frame data received are optimally and then the first frame data.
The correlation being greater than thresholding obtained sometimes may be a lot, in order to simplify processes process, more preferably, record first frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, a value N can be set, when the number of correlation is greater than this set point N, then sorted by order from big to small by correlation, only record top n carries out the sync bit of correlation that slip relevant treatment obtains and correspondence thereof by the first frame data.
Step S304, second frame data and the second synchronizing sequence are carried out slip relevant treatment and obtains multiple correlation, and judge that the second frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation, if existed, then enter step S305; If there is no, then step S301 is returned;
The second frame data received are slided data equally one by one, obtains the operation of correlation.Also need to judge whether the correlation obtained exists the correlation being greater than threshold value.If there is no, then illustrate in the data of reception and do not detect accessible sync bit, therefore need the flow process restarting the present embodiment, again receive data.
Step S305, that records that the second frame data carry out the acquisition of slip relevant treatment is greater than the correlation of threshold value and the sync bit of correspondence thereof.
If there is the correlation being greater than threshold value, need the sync bit of the correlation and correspondence thereof that are greater than threshold value all to record.
Equally, the correlation being greater than thresholding obtained sometimes may be a lot, in order to simplify processes process, more preferably, record second frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, a value N can be set, when the number of correlation is greater than this set point N, then sorted by order from big to small by correlation, only record top n carries out the sync bit of correlation that slip relevant treatment obtains and correspondence thereof by the first frame data.
Step S306, compares sync bit corresponding for the correlation recorded in step S303 and step S305, is interposed between in the scope of setting, then enters step S307 if had between sync bit corresponding to pairwise correlation value; If do not have to be interposed between in the scope of setting between the sync bit of pairwise correlation value, then using the second frame data as the first frame data, return step S303.
Step S307, performs synchronous access by the sync bit that the correlation of the first frame data acquisition is corresponding from pairwise correlation value.
The time interval of two sync bits sync bit corresponding for the correlation recorded in step S303 and step S305 compared, if in the scope of setting, just can determine the position that namely sync bit corresponding to pairwise correlation value can be intercom and synchronously access.Because the first frame is first receive, so should the synchronous access of intercom the sync bit corresponding from the correlation obtained by the first frame.If be interposed between two sync bits in setting range between not free, then need using the second frame data as the first frame data, more again receive the judgement that the second frame data proceed correlation and sync bit.The scope of setting can subtract half symbols to radio frames a radio frames and add between half symbols, because can not cause too large error within the scope of this.Each radio frames comprises multiple character, then the interval set subtracts half symbols to radio frames a radio frames and adds interval that the meaning between half symbols is two sync bits and subtract half symbols to radio frames every all characters that a radio frames comprises and add half symbols.Agreement as adopted in the present embodiment is dPMR, then the time of a radio frames is 80ms, comprises 192 characters, i.e. 384bit data.
In the present embodiment, if the first synchronizing sequence is Fs2, the second synchronizing sequence is CC, then first the first frame data received and Fs2 are carried out slip relevant treatment, then the second frame data received and CC are carried out slip relevant treatment; If the first synchronizing sequence is CC, the second synchronizing sequence is Fs2, then first the first frame data received and CC are carried out slip relevant treatment, then the second frame data received and Fs2 are carried out slip relevant treatment.
The technical scheme of the present embodiment is not only applicable to dPMR system, be also applicable to dPMR system class seemingly, also adopt the other system of synchronizing sequence structure spaced apart.
Technical scheme in the present embodiment, first the first frame data received and the first synchronizing sequence are carried out the correlation larger than threshold value in the relevant place value of slip relevant treatment acquisition to record, continue reception second frame data again, the second frame data received and the second synchronizing sequence are carried out the correlation larger than threshold value in the relevant place value of slip relevant treatment acquisition to record, sync bit corresponding for the threshold value recorded is compared between two, could determine that in setting range sync bit is the synchronous on-position of intercom when the time interval of two sync bits.When the number of the correlation being greater than threshold value is more, in order to simplify processes flow process, can set a numerical value of N, the number of the correlation of record is no more than N.The scheme of the present embodiment is adopted not only to utilize Fs2 but also utilize CC to detect data syn-chronization access, accuracy and noise immunity all increase to data syn-chronization access detection than simple Fs2 or CC that use, empty inspection and undetected probability can be reduced significantly, improving product performance.
Present invention also offers the device corresponding with method, be described below in conjunction with the structure of accompanying drawing to intercom.As shown in Figure 4, intercom comprises: the first receiver module 41, slip related process module 42, logging modle 43, second receiver module 44 and sync bit comparison module 45.
First receiver module 41 is for receiving at least one wireless frame data as the first frame data; Obtain when judgement first frame data carry out slip relevant treatment the correlation that there is not the threshold value being greater than setting in multiple correlation, then receive at least one wireless frame data as the first frame data; Obtain when judgement second frame data carry out slip relevant treatment the correlation that there is not the threshold value being greater than setting in multiple correlation, then receive at least one wireless frame data as the first frame data.
Slip related process module 42 obtains multiple correlation for the first frame data and the first synchronizing sequence are carried out slip relevant treatment, and judges that the first frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation; Second frame data and the second synchronizing sequence are carried out slip relevant treatment and obtains multiple correlation, and judge that the second frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation.
Logging modle 43 is for after judging that the first frame data and the first synchronizing sequence self stored carry out there is the correlation of the threshold value being greater than setting in the correlation that slip relevant treatment obtains, and that records that the first frame data carry out the acquisition of slip relevant treatment is greater than the correlation of threshold value and the sync bit of correspondence thereof; After judging that the second frame data and the second synchronizing sequence self stored carry out there is the correlation of the threshold value being greater than setting in the correlation that slip relevant treatment obtains, that records that the second frame data carry out the acquisition of slip relevant treatment is greater than the correlation of threshold value and the sync bit of correspondence thereof.
Second receiver module 44 is for receiving at least one wireless frame data as the second frame data; When judging that the second frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation
Sync bit comparison module 45 is put compare for the sync bit that the correlation of threshold value and the sync bit of correspondence and the second frame data thereof carry out the correlation and correspondence thereof that are greater than threshold value of slip relevant treatment acquisition of being greater than the first frame data of logging modle record being carried out the acquisition of slip relevant treatment, if be interposed between in the scope of setting between the sync bit that pairwise correlation value is corresponding, then from pairwise correlation value, perform synchronous access by the sync bit that the correlation of the first frame data acquisition is corresponding.The scope of setting is that a radio frames subtracts half symbols to radio frames and adds half symbols.
After sometimes carrying out slip relevant treatment, have multiple correlation, therefore in order to simplify processes flow process, more preferably, the correlation of logging modle 43 also for carrying out the first frame data and the first synchronizing sequence to be greater than in correlation that slip relevant treatment obtains the threshold value of setting sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to the number N of setting, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then record the sync bit of top n correlation and correspondence thereof;
The correlation carrying out the second frame data and the second synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains setting thresholding sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to N, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then according to the sync bit of size order recording top n correlation and correspondence thereof.
In the present embodiment, if the first synchronizing sequence is Fs2, the second synchronizing sequence is CC, then first the first frame data received and Fs2 are carried out slip relevant treatment, then the second frame data received and CC are carried out slip relevant treatment; If the first synchronizing sequence is CC, the second synchronizing sequence is Fs2, then first the first frame data received and CC are carried out slip relevant treatment, then the second frame data received and Fs2 are carried out slip relevant treatment.
The technical scheme of the present embodiment is not only applicable to dPMR system, be also applicable to dPMR system class seemingly, also adopt the other system of synchronizing sequence structure spaced apart.
The first frame data received and the first synchronizing sequence first can be carried out the correlation larger than threshold value in the relevant place value of slip relevant treatment acquisition and record by the device in the present embodiment, continue reception second frame data again, the second frame data received and the second synchronizing sequence are carried out the correlation larger than threshold value in the relevant place value of slip relevant treatment acquisition to record, sync bit corresponding for the threshold value recorded is compared between two, could determine that in setting range sync bit is the synchronous on-position of intercom when the time interval of two sync bits.When the number of the correlation being greater than threshold value is more, in order to simplify processes flow process, can set a numerical value of N, the number of the correlation of record is no more than N.The scheme of the present embodiment is adopted not only to utilize Fs2 but also utilize CC to detect data syn-chronization access, empty inspection and undetected probability can be reduced significantly, improving product performance, the accuracy of synchronous access and noise immunity all increase to data syn-chronization access detection than simple Fs2 or CC that use.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. the dPMR improved postpones a cut-in method, and it is characterized in that, the method comprises:
A, receive at least one wireless frame data as the first frame data;
B, the first frame data and the first synchronizing sequence are carried out slip relevant treatment obtain multiple correlation, and judge the correlation that whether there is the threshold value being greater than setting in described multiple correlation, if existed, then enter step C; If there is no, then steps A is returned;
C, continue at least one wireless frame data after reception first frame data as the second frame data, and record that the first frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof;
D, the second frame data and the second synchronizing sequence are carried out slip relevant treatment obtain multiple correlation, and whether there is the correlation of the threshold value being greater than setting in multiple correlation described in determining step D, if existed, then enter step e; If there is no, then steps A is returned;
E, record that the second frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof;
The interval of the sync bit that the correlation recorded in F, comparison step C and step e is corresponding, whether in the scope of setting, if had, then enters step G; Otherwise, using the second frame data after the first frame data, return step C;
G, sync bit corresponding to correlation obtained by the first frame data from pairwise correlation value perform synchronous access.
2. method according to claim 1, is characterized in that, step C comprises further:
Record first frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, the correlation carrying out the first frame data and the first synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains the threshold value of setting sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to the number N of setting, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then record the sync bit of top n correlation and correspondence thereof;
Step e comprises further:
Record second frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, the correlation carrying out the second frame data and the second synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains setting thresholding sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to N, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then according to the sync bit of size order recording top n correlation and correspondence thereof.
3. method according to claim 1, is characterized in that, the scope of described setting is that a radio frames subtracts half symbols to radio frames and adds half symbols.
4. method according to claim 1, is characterized in that, if the first synchronizing sequence is frame synchronization 2Fs2, the second synchronizing sequence is colour coding CC; If the first synchronizing sequence is colour coding CC, then the second synchronizing sequence is frame synchronization 2Fs2.
5. a device, is characterized in that, this device comprises:
First receiver module, for receiving at least one wireless frame data as the first frame data; Obtain when judgement first frame data carry out slip relevant treatment the correlation that there is not the threshold value being greater than setting in multiple correlation, then receive at least one wireless frame data as the first frame data; Obtain when judgement second frame data carry out slip relevant treatment the correlation that there is not the threshold value being greater than setting in multiple correlation, then receive at least one wireless frame data as the first frame data;
Slip related process module, obtain multiple correlation for the first frame data and the first synchronizing sequence are carried out slip relevant treatment, and judge that the first frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation; Second frame data and the second synchronizing sequence are carried out slip relevant treatment and obtains multiple correlation, and judge that the second frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation;
Logging modle, after judging that the first frame data and the first synchronizing sequence self stored carry out there is the correlation of the threshold value being greater than setting in the correlation that slip relevant treatment obtains, that records that the first frame data carry out the acquisition of slip relevant treatment is greater than the correlation of threshold value and the sync bit of correspondence thereof; After judging that the second frame data and the second synchronizing sequence self stored carry out there is the correlation of the threshold value being greater than setting in the correlation that slip relevant treatment obtains, that records that the second frame data carry out the acquisition of slip relevant treatment is greater than the correlation of threshold value and the sync bit of correspondence thereof;
Second receiver module, for receiving at least one wireless frame data as the second frame data; When judging that the second frame data carry out slip relevant treatment and obtain the correlation that whether there is the threshold value being greater than setting in multiple correlation;
Sync bit comparison module, the sync bit that the correlation of threshold value and the sync bit of correspondence and the second frame data thereof carry out the correlation and correspondence thereof that are greater than threshold value of slip relevant treatment acquisition that is greater than for the first frame data of logging modle record being carried out the acquisition of slip relevant treatment compares, if be interposed between in the scope of setting between the sync bit that pairwise correlation value is corresponding, then from pairwise correlation value, perform synchronous access by the sync bit that the correlation of the first frame data acquisition is corresponding.
6. device according to claim 5, it is characterized in that, described logging modle also for carry out at record first frame data the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, the correlation carrying out the first frame data and the first synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains the threshold value of setting sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to the number N of setting, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then record the sync bit of top n correlation and correspondence thereof;
Record second frame data carry out the acquisition of slip relevant treatment be greater than the correlation of threshold value and the sync bit of correspondence thereof before, the correlation carrying out the second frame data and the second synchronizing sequence to be greater than in the correlation that slip relevant treatment obtains setting thresholding sorts from big to small; If the number being greater than the correlation of the threshold value of setting is less than or equal to N, then record whole correlations and the sync bit of correspondence thereof; If the number being greater than the correlation of the threshold value of setting is greater than N, then according to the sync bit of size order recording top n correlation and correspondence thereof.
7. device according to claim 5, is characterized in that, the scope of described setting is that a radio frames subtracts half symbols to radio frames and adds half symbols.
8. device according to claim 5, is characterized in that, if the first synchronizing sequence is frame synchronization 2Fs2, the second synchronizing sequence is colour coding CC; If the first synchronizing sequence is colour coding CC, then the second synchronizing sequence is frame synchronization 2Fs2.
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| CN201110404241.9A CN103152815B (en) | 2011-12-07 | 2011-12-07 | Improved digital private mobile radio (dPMR) delay access method and device |
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| CN201110404241.9A CN103152815B (en) | 2011-12-07 | 2011-12-07 | Improved digital private mobile radio (dPMR) delay access method and device |
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| CN103152815B true CN103152815B (en) | 2015-06-17 |
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| CN1477889A (en) * | 2002-07-19 | 2004-02-25 | ӡ�����Ƽ��ɷ�����˾ | Frequency synchronization method for digital transmissio network and its equipment |
| CN101594185A (en) * | 2009-04-10 | 2009-12-02 | 西北工业大学 | The Doppler of mobile water sound communication signal estimates and method for synchronous |
| CN101778088A (en) * | 2010-03-12 | 2010-07-14 | 中国科学院声学研究所 | Training sequence frame timing synchronized method based on pseudo-random sequence modulation based |
| CN101841505A (en) * | 2009-03-20 | 2010-09-22 | 天际微芯(北京)科技有限公司 | Method for obtaining frame synchronization information in frame detection system with correlation characteristics |
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| CN1477889A (en) * | 2002-07-19 | 2004-02-25 | ӡ�����Ƽ��ɷ�����˾ | Frequency synchronization method for digital transmissio network and its equipment |
| CN101841505A (en) * | 2009-03-20 | 2010-09-22 | 天际微芯(北京)科技有限公司 | Method for obtaining frame synchronization information in frame detection system with correlation characteristics |
| CN101594185A (en) * | 2009-04-10 | 2009-12-02 | 西北工业大学 | The Doppler of mobile water sound communication signal estimates and method for synchronous |
| CN101778088A (en) * | 2010-03-12 | 2010-07-14 | 中国科学院声学研究所 | Training sequence frame timing synchronized method based on pseudo-random sequence modulation based |
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