CN101990294A - GPS deviation detecting and processing method and system - Google Patents
GPS deviation detecting and processing method and system Download PDFInfo
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- CN101990294A CN101990294A CN2009100899670A CN200910089967A CN101990294A CN 101990294 A CN101990294 A CN 101990294A CN 2009100899670 A CN2009100899670 A CN 2009100899670A CN 200910089967 A CN200910089967 A CN 200910089967A CN 101990294 A CN101990294 A CN 101990294A
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Abstract
The invention discloses a global positioning system (GPS) deviation detecting and processing method and a GPS deviation detecting and processing system. The method comprises the following steps of: configuring an uplink time slot for detection; detecting a downlink synchronous code in the uplink time slot; and determining whether the deviation occurs according to the detected downlink synchronous code. By using the method and the system, the correctness for the detection of the GPS deviation can be improved.
Description
Technical field
The present invention relates to radio communication, particularly a kind of detection processing method and system of GPS sideslip.
Background technology
TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, the TD SDMA access) mobile communication system is a tdd systems, the base station is generally by GPS (Global Positioning System, global positioning system) keep between the base station synchronously, in a single day the GPS module of base station is damaged or fault, will produce timing wander, this paper is referred to as the GPS sideslip with this situation.
When the GPS sideslip takes place; regularly often has sliding properties; promptly regularly constantly can be along with the time changes; like this through after the certain hour; the DwPTS of sideslip base station (Downlink Pilot Time Slot; descending pilot frequency time slot) the up receiving slot of normal base station, adjacent sub-district be will inevitably drop on, UpPTS (Uplink Pilot Time slot, uplink pilot time slot), uplink service time slot etc. comprised.Thereby make the sideslip base station downstream signal to around the upward signal of other base station cause interference, the interference of other a plurality of base stations around perhaps the upward signal of sideslip base station is subjected to.
The deficiencies in the prior art are: do not have a kind of reliable GPS sideslip to detect processing scheme at present.
Summary of the invention
Technical problem solved by the invention is to provide a kind of reliable GPS sideslip to detect processing method and system.
A kind of detection processing method of GPS sideslip is provided in the embodiment of the invention, has comprised the steps:
The ascending time slot that configuration is used to detect;
In described ascending time slot, detect descending synchronous code SYNC_DL;
Determine whether to take place sideslip according to detected SYNC_DL.
Preferably, in described ascending time slot, detect SYNC_DL, comprising:
Described ascending time slot is divided into data segment, and the data segment, length after the segmentation is greater than the length of SYNC_DL;
Selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after FFT and IFFT calculate;
Maximum place row in the matrix is carried out peak value to be detected;
When satisfying detection threshold, peak value determines to detect SYNC_DL.
Preferably, described ascending time slot is divided into data segment after, further comprise:
Timeshare rotation selects data segment to be used for FFT and IFFT calculates.
Preferably, selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after FFT and IFFT calculate, comprising:
P data trailing zero, obtain N point complex-valued sequences sync_data, wherein: P is the data number of selected data section, and N is 2 n power, and n is an integer;
Mend N-64 0 after length is 64 SYNC_DL sign indicating number, constituting length is the local code sequence of N, is designated as sync_code, and the power train column matrix is calculated as follows:
fft_data＝FFT(sync_data)
fft_code＝FFT(sync_code)
rx_cor＝IFFT(fft_data×fft_code
*)
rx_pow＝[Re(rx_cor)]
2+[Im(rx_cor)]
2
Calculating the back, to obtain 32 group length be the power sequence rx_pow of N, and rx_pow is 32 * N matrix, and wherein on behalf of the SYNC_DL sign indicating number, the row of matrix number number.
Preferably, under many antennas situation,
On all antennas, selected data section and 32 SYNC_DL are carried out FFT and IFFT calculating back summation, obtain 32 groups of power train column matrix;
Or, selected data section and 32 SYNC_DL are carried out sue for peace after FFT and IFFT calculate power series at the part antenna, obtain 32 groups of power train column matrix;
Or, calculate the power series of the 1st number in sync_data and 32 the SYNC_DL sign indicating numbers in first subframe, second subframe is in same time slot, same position, calculate the power series of the 2nd number in sync_data and 32 the SYNC_DL sign indicating numbers, and the like, after receiving 32 sub-frame datas, obtaining 32 group length is the related power sequence rx_pow of P.
Preferably, when the ascending time slot that configuration is used to detect, the configuration far-end disturbs minimum ascending time slot to be used for detecting.
Preferably, in described ascending time slot, before the detection descending synchronous code SYNC_DL, further comprise:
Carry out the measurement of ISCP at ascending time slot,, then be enabled in and detect descending synchronous code SYNC_DL in the described ascending time slot if the continuous a plurality of subframes of ISCP instantaneous value that measures or mean value are higher than the thresholding of setting.
Preferably, carry out the measurement of ISCP at ascending time slot after, in being enabled in described ascending time slot, detect descending synchronous code SYNC_DL before, further comprise:
Judge whether ascending time slot is business time-slot;
At ascending time slot is business time-slot, and when not having business, carries out the detection of SYNC_DL at ascending time slot.
Preferably, further comprise:
Report the sideslip testing result, described testing result comprise detected SYNC_DL number, detect one of detection number of times, frequency, time slot or its combination of SYNC_DL.
Preferably, before determining whether sideslip takes place according to detected SYNC_DL, further comprise:
The number of times of the SYNC_DL that statistics is consecutively detected and/or the number of times summation of the detected SYNC_DL in a period of time;
With the number of times summation of the number of times of the SYNC_DL that is consecutively detected and/or the detected SYNC_DL in a period of time as the foundation that determines whether to take place sideslip.
Preferably, determine whether to take place sideslip, comprising according to detected SYNC_DL:
If detect the SYNC_DL that a base station sends, determine that then the base station of transmission SYNC_DL is the sideslip base station;
If detect the SYNC_DL that two and above base station send, determine that then base stations detected is the sideslip base station.
The present invention also provides a kind of detecting processing system of GPS sideslip, comprising:
Configuration module is used to dispose the ascending time slot that is used to detect;
Detection module is used for detecting descending synchronous code SYNC_DL at described ascending time slot;
Judge module is used for determining whether to take place sideslip according to detected SYNC_DL.
Preferably, described detection module comprises:
Segmenting unit is used for described ascending time slot is divided into data segment, and the data segment, length after the segmentation is greater than the length of SYNC_DL;
The matrix acquiring unit is used for selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after FFT and IFFT calculate;
Peak detection unit is used for that matrix maximum place row is carried out peak value and detects;
Detecting unit is used for determining to detect SYNC_DL when peak value satisfies detection threshold.
Preferably, described segmenting unit is further used for after described ascending time slot is divided into data segment, and timeshare rotation selects data segment to be used for FFT and IFFT calculates.
Preferably, described matrix acquiring unit comprises:
The zero padding subelement is used for P data trailing zero, obtains N point complex-valued sequences sync_data, and wherein: P is the data number of selected data section, and N is 2 n power, and n is an integer; Mend N-64 0 after length is 64 SYNC_DL sign indicating number, constituting length is the local code sequence of N, is designated as sync_code,
Computation subunit is used to be calculated as follows the power train column matrix:
fft_data＝FFT(sync_data)
fft_code＝FFT(sync_code)
rx_cor＝IFFT(fft_data×fft_code
*)
rx_pow＝[Re(rx_cor)]
2+[Im(rx_cor)]
2
Calculating the back, to obtain 32 group length be the power sequence rx_pow of N, and rx_pow is 32 * N matrix, and wherein on behalf of the SYNC_DL sign indicating number, the row of matrix number number.
Preferably, described matrix acquiring unit is further used under many antennas situation, on all antennas selected data section and 32 SYNC_DL is carried out FFT and IFFT calculating back summation, obtains 32 groups of power train column matrix; Or, selected data section and 32 SYNC_DL are carried out sue for peace after FFT and IFFT calculate power series at the part antenna, obtain 32 groups of power train column matrix; Or, calculate the power series of the 1st number in sync_data and 32 the SYNC_DL sign indicating numbers in first subframe, second subframe is in same time slot, same position, calculate the power series of the 2nd number in sync_data and 32 the SYNC_DL sign indicating numbers, and the like, after receiving 32 sub-frame datas, obtaining 32 group length is the related power sequence rx_pow of P.
Preferably, described configuration module is further used for when the ascending time slot that configuration is used to detect, and the configuration far-end disturbs minimum ascending time slot to be used for detecting.
Preferably, further comprise:
Start module, be used for before described ascending time slot detects descending synchronous code SYNC_DL, carry out the measurement of ISCP at ascending time slot, if the continuous a plurality of subframes of ISCP instantaneous value that measures or mean value are higher than the thresholding of setting, then are enabled in and detect descending synchronous code SYNC_DL in the described ascending time slot.
Preferably, further comprise:
Business module is used for after ascending time slot carries out the measurement of ISCP, before the detection descending synchronous code SYNC_DL, judges whether ascending time slot is business time-slot in being enabled in described ascending time slot; At ascending time slot is business time-slot, and when not having business, carries out the detection of SYNC_DL at ascending time slot.
Preferably, further comprise:
Reporting module is used to report the sideslip testing result, described testing result comprise detected SYNC_DL number, detect one of detection number of times, frequency, time slot or its combination of SYNC_DL.
Preferably, further comprise:
Statistical module is used for before determining whether sideslip takes place according to detected SYNC_DL, the number of times of the SYNC_DL that statistics is consecutively detected and/or the number of times summation of the detected SYNC_DL in a period of time; With the number of times summation of the number of times of the SYNC_DL that is consecutively detected and/or the detected SYNC_DL in a period of time as the foundation that determines whether to take place sideslip.
Preferably, described judge module is further used for when determining whether sideslip takes place according to detected SYNC_DL, if detect the SYNC_DL that a base station sends, determines that then the base station of transmission SYNC_DL is the sideslip base station; If detect the SYNC_DL that two and above base station send, determine that then base stations detected is the sideslip base station.
Beneficial effect of the present invention is as follows:
In the invention process, behind the ascending time slot that configuration is used to detect, in this ascending time slot, detect SYNC_DL, and determine whether to take place sideslip according to detected SYNC_DL.Because after sideslip takes place, can in ascending time slot, detect the DwPTS of other base station, therefore, by detecting SYNC_DL, just can determine whether DwPTS appears in the uplink pilot time slot, and and then can judge the GPS sideslip whether occurs, so the scheme that provides in the embodiment of the invention can improve the accuracy that the GPS sideslip detects.
Description of drawings
Fig. 1 is the detection processing method implementing procedure schematic diagram of GPS sideslip in the embodiment of the invention;
Fig. 2 is the detecting processing system structural representation of GPS sideslip in the embodiment of the invention;
Fig. 3 is that the GPS sideslip detects the implementing procedure schematic diagram in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Fig. 1 is the detection processing method implementing procedure schematic diagram of GPS sideslip, as shown in the figure, carries out can comprising the steps: when the GPS sideslip is handled
The ascending time slot that step 101, configuration are used to detect;
Concrete enforcement to each step describes below, in the explanation, to describe according to a complete flow process, so that can understand how to implement the present invention more clearly on the whole, the content that illustrates not only comprises step 101-103 and concrete execution mode thereof, also comprised and how to have determined the position detected, detection trigger how, reporting of testing result, contents such as the judgement of sideslip, obviously, the content that increases does not mean that each processing all needs to carry out, but understand easily, after having increased these contents, that the detection processing procedure of feasible GPS sideslip is more perfect, effect is more outstanding.To be that example describes with the base station among the embodiment, obviously, other need carry out the equipment that the GPS sideslip is measured, and possess the configuration detection time slot, the equipment that detects SYNC_DL all can be used to implement.
Need to prove, scheme among the embodiment not only can be used for the TD-SCDMA system, so long as similarly TDD (Time Division Duplex, time division duplex) system, pilot tone send mode can use the scheme among the embodiment to carry out the detection of GPS sideslip.That is, so long as when the GPS sideslip takes place, the DwPTS of sideslip base station can drop on the up receiving slot of normal base station, adjacent sub-district, and the system configuration that comprises UpPTS, uplink service time slot etc. can adopt the scheme in the embodiment of the invention.
One, the position of GPS sideslip detection determines.
The GPS sideslip detects and can carry out at one or more ascending time slots of TD-SCDMA system configuration, and the ascending time slot here not only comprises business time-slot, also comprises special time slot.Disturb in order to distinguish far-end, can disturb the situation that the position occurs according to the far-end of actual measurement, select the position that distal stem disturbs that is not vulnerable to wherein to carry out, promptly, in the execution of step 101, when the ascending time slot that configuration is used to detect, can also dispose far-end and disturb minimum ascending time slot to be used for detecting.
If the position of selecting is at business time-slot, the interference that the configuration far-end disturbs minimum ascending time slot to be used to detect can also to avoid business datum etc.
When the configuration far-end disturbs minimum time slot, can be whole time slot, also can be the part of a time slot, also can be the part that a time slot or several time slot add a time slot.Such as, from the latter half of time slot 1, far-end disturbs and to diminish, and then can dispose the latter half of time slot 1, and later any ascending time slot of time slot 1 or their combination.
Two, the triggering of GPS sideslip detection:
Step 102 detects descending synchronous code SYNC_DL in ascending time slot before, can further include:
Carry out ISCP (Interfere Signal Code Power at ascending time slot, Interference Signal Code Power) measurement, if the continuous a plurality of subframes of ISCP instantaneous value that measures or mean value are higher than the thresholding of setting, then are enabled in and detect descending synchronous code SYNC_DL in the described ascending time slot.
Further, carry out the measurement of ISCP at ascending time slot after, in being enabled in described ascending time slot, detect descending synchronous code SYNC_DL before, can also comprise:
Judge whether ascending time slot is business time-slot;
At ascending time slot is business time-slot, and when not having business, carries out the detection of SYNC_DL at ascending time slot.
The reason of above-mentioned enforcement is, not to be vulnerable to the position that distal stem disturbs be the measurement that unit carries out ISCP with time slot or data segment above-mentioned in the base station, if an ISCP instantaneous value that measures or a mean value N continuous subframe all are higher than the thresholding ISCP_abnormal of setting, think that then ISCP is unusual, then the condition that this condition can be detected as base station initiated GPS sideslip.N value and threshold value ISCP_abnormal then can be provided with according to the actual measurement situation.
In addition, if what choose is business time-slot, for fear of the interference of business datum, detection is not carry out when having business, in concrete the enforcement, carries out such as the time (such as evening) that detection can be placed on this business time-slot free time.Therefore, this business time-slot can also there be, do not have the professional entry condition that also detects as the GPS sideslip.
Certainly, according to demand, other trigger condition can be set also in the enforcement.
Three, the detection of GPS sideslip.
If one of trigger condition described in two, then the base station begins to start the detection of GPS sideslip, i.e. the execution of step 102.Below following explanation is carried out in the enforcement of testing process:
(1), selects data segment.
For the ease of carrying out related calculation, can the data sementation of the position of rule described in will be met, section length P should be greater than the length 64 of SYNC_DL sign indicating number, the actual surplus of staying is big, such as 128 etc., that is, the ascending time slot that disposes in the step 101 is divided into data segment, the data segment, length after the segmentation is greater than the length of SYNC_DL.
Related operation can carry out simultaneously at all data segments that satisfies condition.
The characteristics more slowly of timing wander during according to the GPS sideslip can also detect in different data segment timeshare rotations by certain rule.If amount of calculation does not allow, can the fixing length in use location be one or several data segment of P also, promptly, after ascending time slot is divided into data segment, can also timeshare rotation select data segment to be used for following FFT (Fast Fourier Transform, fast fourier transform) and IFFT (Inverse Fast Fourier Transform, invert fast fourier transformation) calculate.
(2), selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after FFT and IFFT calculate.
In the enforcement, calculate the correlated results of selected data section and 32 SYNC_DL sign indicating numbers.Correlation computations can realize by FFT and IFFT.
P data trailing zero, obtain N point complex-valued sequences sync_data, wherein: P is the data number of selected data section, and N is 2 n power, and n is an integer.
Equally, mend N-64 0 after the SYNC_DL of length 64 sign indicating number, constituting length is the local code sequence of N, is designated as sync_code.
Then related power series matrix computations is as follows:
fft_data＝FFT(sync_data)
fft_code＝FFT(sync_code)
rx_cor＝IFFT(fft_data×fft_code
*)
rx_pow＝[Re(rx_cor)]
2+[Im(rx_cor)]
2
Though what FFT calculated is circular convolution, considers that the length of SYNC_DL sign indicating number is 64, be positioned at the centre of " feature window " substantially, and power is bigger.Therefore, compare the do not have the greatest impact position of related power point of the result of calculation of FFT with linear convolution.
So just can obtain 32 group length is the related power sequence rx_pow of N.Rx_pow is 32 * N matrix, and wherein the row of matrix number is represented SYNC_DL sign indicating number numbering.
If amount of calculation allows, as above operation can be operated many antennas, and with the related power summation of trying to achieve on many antennas.
If amount of calculation does not allow, can adopt in the following scheme:
A, only one or a few the data in the many antennas are carried out the calculating and the summation of related power.
B, utilize behind the GPS sideslip timing wander characteristics more slowly, can calculate the correlated results of the 1st number in sync_data and 32 the SYNG_DL sign indicating numbers in first subframe, second subframe is in same time slot, same position, calculate the correlated results of the 2nd number in sync_data and 32 the SYNC_DL sign indicating numbers, and the like, after receiving 32 sub-frame datas, can obtain 32 group length is the related power sequence rx_pow of P.Rx_pow is 32 * P matrix, and wherein row is represented SYNC_DL sign indicating number numbering.
The combination of C, the above two kinds of method for simplifying of use.
That is, in above-mentioned processing, under many antennas situation,
On all antennas, selected data section and 32 SYNC_DL are carried out FFT and IFFT calculating back summation, obtain 32 groups of power train column matrix;
Or, selected data section and 32 SYNC_DL are carried out sue for peace after FFT and IFFT calculate power series at the part antenna, obtain 32 groups of power train column matrix;
Or, calculate the power series of the 1st number in sync_data and 32 the SYNC_DL sign indicating numbers in first subframe, second subframe is in same time slot, same position, calculate the power series of the 2nd number in sync_data and 32 the SYNC_DL sign indicating numbers, and the like, after receiving 32 sub-frame datas, obtaining 32 group length is the related power sequence rx_pow of P.
Obviously, under the situation that amount of calculation allows, also can adopt the mode of B, C to obtain matrix in the enforcement.
(3), maximum place row in the matrix carried out peak value detect, when peak value satisfies detection threshold, determine to detect SYNC_DL.
To find out the row at the maximum place in the matrix in this step process, and carry out peak value and detect.
In the enforcement, the result that peak value detects promptly the correlation computations that obtains according to (2) i.e. the matrix of 32 * P, finds in the matrix the pairing row of maximum number to be k, and this peak value is confirmed.Promptly set certain detection threshold, when this peak value satisfies certain detection threshold condition, determine that just this peak value exists really, thereby identification has detected k SYNC_DL sign indicating number.
If detected k SYNC_DL sign indicating number, then search in the correlated results the pairing row of the maximum except that k is capable and number be m, carry out identical peak value and detect m is capable.
(4), write down this testing result.
Four, the judgement of testing result and reporting.
In order to improve the precision of detection, before determining whether sideslip takes place, can further include according to detected SYNC_DL:
The number of times of the SYNC_DL that statistics is consecutively detected and/or the number of times summation of the detected SYNC_DL in a period of time;
With the number of times summation of the number of times of the SYNC_DL that is consecutively detected and/or the detected SYNC_DL in a period of time as the foundation that determines whether to take place sideslip.
In the enforcement,, therefore can carry out detecting operation to the identical position of continuous a plurality of sub-frame datas because often there is higher probability of false detection in one-time detection.Two kinds of decision procedures can be arranged here at least:
Mode one:, think that then success detects the DwPTS of certain base station if N continuous successfully detects certain SYNC_DL code word for 1 time.The desirable smaller number of N1 is such as 4,5 etc.
Mode two: detection number of times and testing result in statistics a period of time T, if total detection number of times is M1,, think that then success has detected the DwPTS of certain base station if the number of times that certain SYNC_DL code word occurs surpasses Nd.Wherein Nd choose according to the following rules that Nd/M1＞(S*1/32), wherein S gets the number greater than 1 for the protection factor, such as 5 etc.Choosing of T can not be too big, and be too big, then may surpass the speed of GPS sideslip timing wander; Too little, then do not have a statistical significance, actual desirable a few minutes.
After detect finishing, can also report the sideslip testing result to the base station, testing result can comprise detected SYNC_DL number, detect one of detection number of times, frequency, time slot or its combination of SYNC_DL.
In the enforcement, testing result need be write down in the base station, comprises detected SYNC_DL number, the detection number of times of each detected SYNC_DL, frequency, time slot etc., in order to webmaster O﹠amp; M (Operations﹠amp; Maintenance, operation and maintenance) inquiry.In addition, excessive for fear of the alarm amount, O﹠amp; The GPS sideslip can may take place with prompting for operation dimension personnel for the first time or precedingly report to OMC (Operation﹠Maintenance Center, operation maintenance center) when inquiring the GPS sideslip several times in M.Later then outcome record that will at every turn inquire about arrives local, and the O﹠M personnel extract this document analysis by the time.
Five, the judgement of GPS sideslip.
Determining whether to take place sideslip according to detected SYNC_DL, can comprise:
If detect the SYNC_DL that a base station sends, determine that then the base station of transmission SYNC_DL is the sideslip base station;
If detect the SYNC_DL that two and above base station send, determine that then base stations detected is the sideslip base station.
In the enforcement, the information that webmaster reports according to the base station is carried out the judgement and the investigation of GPS sideslip.If only detect the DwPTS that base station sends, then this base station is GPS sideslip base station, if detect the DwPTS that two and above base station send, then can think this sub-district GPS sideslip.Again according to SYNC_DL number, and the position of reporting base station, just can determine the sideslip base station.
In addition, owing to when choosing the ascending time slot position, got rid of the influence that far-end disturbs, therefore generally be not subjected to the influence of far-end interference according to the judged result of such scheme.
Based on same inventive concept, a kind of detecting processing system of GPS sideslip also is provided in the embodiment of the invention, because the principle that system deals with problems is similar to the detection processing method of GPS sideslip, so the enforcement of system can repeat part and not give unnecessary details referring to the enforcement of method.
Fig. 2 is the detecting processing system structural representation of GPS sideslip, as shown in the figure, can comprise in the detecting processing system:
In the enforcement, configure the ascending time slot that is used to detect at configuration module 201 after, detection module 202 detects descending synchronous code SYNC_DL in this ascending time slot, judge module 203 then determines whether to take place sideslip according to detected SYNC_DL.
In the enforcement, detection module can comprise:
Segmenting unit is used for described ascending time slot is divided into data segment, and the data segment, length after the segmentation is greater than the length of SYNC_DL;
The matrix acquiring unit is used for selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after FFT and IFFT calculate;
Peak detection unit is used for that matrix maximum place row is carried out peak value and detects;
Detecting unit is used for determining to detect SYNC_DL when peak value satisfies detection threshold.
In concrete the enforcement, segmenting unit can be further used for after described ascending time slot is divided into data segment, and timeshare rotation selects data segment to be used for FFT and IFFT calculates.
Can comprise in the matrix acquiring unit:
The zero padding subelement is used for P data trailing zero, obtains N point complex-valued sequences sync_data, and wherein: P is the data number of selected data section, and N is 2 n power, and n is an integer; Mend N-64 0 after length is 64 SYNC_DL sign indicating number, constituting length is the local code sequence of N, is designated as sync_code,
Computation subunit is used to be calculated as follows the power train column matrix:
fft_data＝FFT(sync_data)
fft_code＝FFT(sync_code)
rx_cor＝IFFT(fft_data×fft_code
*)
rx_pow＝[Re(rx_cor)]
2+[Im(rx_cor)]
2，
Calculating the back, to obtain 32 group length be the power sequence rx_pow of N, and rx_pow is 32 * N matrix, and wherein on behalf of the SYNC_DL sign indicating number, the row of matrix number number.
The matrix acquiring unit can also be further used under many antennas situation, on all antennas selected data section and 32 SYNC_DL is carried out FFT and IFFT calculating back summation, obtains 32 groups of power train column matrix; Or, selected data section and 32 SYNC_DL are carried out sue for peace after FFT and IFFT calculate power series at the part antenna, obtain 32 groups of power train column matrix; Or, calculate the power series of the 1st number in sync_data and 32 the SYNC_DL sign indicating numbers in first subframe, second subframe is in same time slot, same position, calculate the power series of the 2nd number in sync_data and 32 the SYNC_DL sign indicating numbers, and the like, after receiving 32 sub-frame datas, obtaining 32 group length is the related power sequence rx_pow of P.
In the enforcement, configuration module can be further used for when the ascending time slot that configuration is used to detect, and the configuration far-end disturbs minimum ascending time slot to be used for detecting.
In the enforcement, can further include in the detection system:
In the enforcement, can further include in the detection system:
In the enforcement, can further include in the detection system:
In the enforcement, can further include in the detection system:
In the enforcement, judge module can be further used for when determining whether sideslip takes place according to detected SYNC_DL, if detect the SYNC_DL that base station sends, the base station that then can determine to send SYNC_DL is the sideslip base station; If detect the SYNC_DL that two and above base station send, can determine that then base stations detected is the sideslip base station.
For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, when enforcement is of the present invention, can in same or a plurality of softwares or hardware, realize the function of each module or unit.
In order to show implementing procedure of the present invention clearly, come whole implementing procedure brief description with flow chart below, need to prove that the division to each step in this example is also not quite identical with the foregoing description, its purpose is to understand enforcement of the present invention from different angles.
Fig. 3 as shown in the figure, can comprise when sideslip detects for the GPS sideslip detects the implementing procedure schematic diagram:
That is the ascending time slot of configuration detection;
The trigger condition of judging in this step can be whether ISCP surpasses thresholding.
In this step, whether when the time slot that detects is business time-slot, also needing to judge has business on this time slot, if business is arranged then do not detect;
This step is that the situation that relates to many antennas is handled;
Step 310, judge whether to detect next time, be then to change step 304 over to, otherwise change step 311 over to;
In this step, on the one hand this testing result being changed over to next step prepares to add up, can judge whether that also needs detect according to setting on the other hand,, whether also mediumly perhaps detect in the period T of setting detection time such as detecting the number of times requirement whether number of times has reached detection.
The result that step 311, statistics detect for N time judges, writes down, reports relevant result;
TDD system, pilot tone send mode as can be seen from the above-described embodiment, in the GPS sideslip detection scheme that the embodiment of the invention provides, not only can be used for the TD-SCDMA system, so long as similarly can use the scheme among the embodiment to carry out the detection of GPS sideslip.
Further, proposed to trigger the judgment mode that the GPS sideslip detects in the scheme, this mode can be distinguished the influence that far-end disturbs.
Further, the reception data that proposed to choose ad-hoc location in the scheme are carried out GPS sideslip detection mode, and this mode can be distinguished far-end simultaneously and disturb.
Further, proposed in the scheme carrying out the mode that data that sideslip detects are carried out segmentation, this mode can be so that realize related operation.
Further, proposed in the scheme different pieces of information section is carried out the mode that timeshare rotation is handled, this mode has been utilized the characteristics of GPS sideslip, can reduce the burden of amount of calculation and processor.
Further, proposed only to choose the mode that wherein a part of data segment is handled in the scheme, this mode has been utilized the characteristics of GPS sideslip, can reduce the burden of amount of calculation and processor.
Further, proposed the calculating time-division subframe processing mode that every segment data and 32 SYNC_DL sign indicating numbers carry out correlation in the scheme, this mode has been utilized the characteristics of GPS sideslip, has reduced operand.
Further, proposed the mode of concrete twice search peak of a related operation in the scheme, this mode one correlations may detect two possible SYNC_DL sign indicating numbers at most, and can be generalized to greater than twice.
Further, proposed in the scheme that the base station needing after the GPS sideslip detects to carry out writing down and the mode of the particular content that reports.
Further, proposed webmaster in the scheme and carried out GPS sideslip decision procedure according to the base station reported result.
Further, in the scheme O﹠amp has been proposed; M reports the mode of OMC, and this mode can be avoided the appearance of a large amount of alarms in the OMC side.
By the scheme that provides in the embodiment of the invention, provided the concrete scheme that the GPS sideslip detects, how the detection trigger such as how detects, and how to report testing result, and how webmaster is judged according to testing result.Simultaneously, this scheme can be distinguished far-end and disturb, and helps the raising of the accuracy of GPS sideslip detection.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Claims (22)
1. the detection processing method of a global position system GPS sideslip is characterized in that, comprises the steps:
The ascending time slot that configuration is used to detect;
In described ascending time slot, detect descending synchronous code SYNC_DL;
Determine whether to take place sideslip according to detected SYNC_DL.
2. the method for claim 1 is characterized in that, detects SYNC_DL in described ascending time slot, comprising:
Described ascending time slot is divided into data segment, and the data segment, length after the segmentation is greater than the length of SYNC_DL;
Selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after fast fourier transform FFT and invert fast fourier transformation IFFT calculate;
Maximum place row in the matrix is carried out peak value to be detected;
When satisfying detection threshold, peak value determines to detect SYNC_DL.
3. method as claimed in claim 2 is characterized in that, described ascending time slot is divided into data segment after, further comprise:
Timeshare rotation selects data segment to be used for FFT and IFFT calculates.
4. method as claimed in claim 2 is characterized in that, selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after FFT and IFFT calculate, and comprising:
P data trailing zero, obtain N point complex-valued sequences sync_data, wherein: P is the data number of selected data section, and N is 2 n power, and n is an integer;
Mend N-64 0 after length is 64 SYNC_DL sign indicating number, constituting length is the local code sequence of N, is designated as sync_code, and the power train column matrix is calculated as follows:
fft_data＝FFT(sync_data)
fft_code＝FFT(sync_code)
rx_cor＝IFFT(fft_data×fft_code
*)
rx_pow＝[Re(rx_cor)]
2+[Im(rx_cor)]
2
Calculating the back, to obtain 32 group length be the power sequence rx_pow of N, and rx_pow is 32 * N matrix, and wherein on behalf of the SYNC_DL sign indicating number, the row of matrix number number.
5. method as claimed in claim 4 is characterized in that, under many antennas situation,
On all antennas selected data section and 32 SYNC_DL are being carried out after FFT and IFFT calculate, summation obtains 32 groups of power train column matrix;
Or, selected data section and 32 SYNC_DL are carried out sue for peace after FFT and IFFT calculate power series at the part antenna, obtain 32 groups of power train column matrix;
Or, calculate the power series of the 1st number in sync_data and 32 the SYNC_DL sign indicating numbers in first subframe, second subframe is in same time slot, same position, calculate the power series of the 2nd number in sync_data and 32 the SYNC_DL sign indicating numbers, and the like, after receiving 32 sub-frame datas, obtaining 32 group length is the related power sequence rx_pow of P.
6. as the arbitrary described method of claim 1 to 5, it is characterized in that when the ascending time slot that configuration is used to detect, the configuration far-end disturbs minimum ascending time slot to be used for detecting.
7. as the arbitrary described method of claim 1 to 5, it is characterized in that, in described ascending time slot, before the detection descending synchronous code SYNC_DL, further comprise:
Carry out the measurement of Interference Signal Code Power ISCP at ascending time slot,, then be enabled in and detect descending synchronous code SYNC_DL in the described ascending time slot if the continuous a plurality of subframes of ISCP instantaneous value that measures or mean value are higher than the thresholding of setting.
8. method as claimed in claim 7 is characterized in that, carry out the measurement of ISCP at ascending time slot after, in being enabled in described ascending time slot, detect descending synchronous code SYNC_DL before, further comprise:
Judge whether ascending time slot is business time-slot;
At ascending time slot is business time-slot, and when not having business, carries out the detection of SYNC_DL at ascending time slot.
9. as the arbitrary described method of claim 1 to 5, it is characterized in that, further comprise:
Report the sideslip testing result, described testing result comprise detected SYNC_DL number, detect one of detection number of times, frequency, time slot or its combination of SYNC_DL.
10. as the arbitrary described method of claim 1 to 5, it is characterized in that, before determining whether sideslip takes place according to detected SYNC_DL, further comprise:
The number of times of the SYNC_DL that statistics is consecutively detected and/or the number of times summation of the detected SYNC_DL in a period of time;
With the number of times summation of the number of times of the SYNC_DL that is consecutively detected and/or the detected SYNC_DL in a period of time as the foundation that determines whether to take place sideslip.
11., it is characterized in that as the arbitrary described method of claim 1 to 5, determine whether to take place sideslip according to detected SYNC_DL, comprising:
If detect the SYNC_DL that a base station sends, determine that then the base station of transmission SYNC_DL is the sideslip base station;
If detect the SYNC_DL that two and above base station send, determine that then base stations detected is the sideslip base station.
12. the detecting processing system of a GPS sideslip is characterized in that, comprising:
Configuration module is used to dispose the ascending time slot that is used to detect;
Detection module is used for detecting descending synchronous code SYNC_DL at described ascending time slot;
Judge module is used for determining whether to take place sideslip according to detected SYNC_DL.
13. system as claimed in claim 12 is characterized in that, described detection module comprises:
Segmenting unit is used for described ascending time slot is divided into data segment, and the data segment, length after the segmentation is greater than the length of SYNC_DL;
The matrix acquiring unit is used for selected data section and 32 SYNC_DL are carried out obtaining 32 groups of power train column matrix after FFT and IFFT calculate;
Peak detection unit is used for that matrix maximum place row is carried out peak value and detects;
Detecting unit is used for determining to detect SYNC_DL when peak value satisfies detection threshold.
14. system as claimed in claim 12 is characterized in that, described segmenting unit is further used for after described ascending time slot is divided into data segment, and timeshare rotation selects data segment to be used for FFT and IFFT calculates.
15. system as claimed in claim 13 is characterized in that, described matrix acquiring unit comprises:
The zero padding subelement is used for P data trailing zero, obtains N point complex-valued sequences sync_data, and wherein: P is the data number of selected data section, and N is 2 n power, and n is an integer; Mend N-64 0 after length is 64 SYNC_DL sign indicating number, constituting length is the local code sequence of N, is designated as sync_code,
Computation subunit is used to be calculated as follows the power train column matrix:
fft_data＝FFT(sync_data)
fft_code＝FFT(sync_code)
rx_cor＝IFFT(fft_data×fft_code
*)
rx_pow＝[Re(rx_cor)]
2+[Im(rx_cor)]
2
Calculating the back, to obtain 32 group length be the power sequence rx_pow of N, and rx_pow is 32 * N matrix, and wherein on behalf of the SYNC_DL sign indicating number, the row of matrix number number.
16. system as claimed in claim 15, it is characterized in that, described matrix acquiring unit is further used under many antennas situation, on all antennas selected data section and 32 SYNC_DL is carried out FFT and IFFT calculating back summation, obtains 32 groups of power train column matrix; Or, selected data section and 32 SYNC_DL are carried out sue for peace after FFT and IFFT calculate power series at the part antenna, obtain 32 groups of power train column matrix; Or, calculate the power series of the 1st number in sync_data and 32 the SYNC_DL sign indicating numbers in first subframe, second subframe is in same time slot, same position, calculate the power series of the 2nd number in sync_data and 32 the SYNC_DL sign indicating numbers, and the like, after receiving 32 sub-frame datas, obtaining 32 group length is the related power sequence rx_pow of P.
17., it is characterized in that described configuration module is further used for when the ascending time slot that configuration is used to detect as the arbitrary described system of claim 12 to 16, the configuration far-end disturbs minimum ascending time slot to be used for detecting.
18. as the arbitrary described system of claim 12 to 16, it is characterized in that, further comprise:
Start module, be used for before described ascending time slot detects descending synchronous code SYNC_DL, carry out the measurement of ISCP at ascending time slot, if the continuous a plurality of subframes of ISCP instantaneous value that measures or mean value are higher than the thresholding of setting, then are enabled in and detect descending synchronous code SYNC_DL in the described ascending time slot.
19. system as claimed in claim 18 is characterized in that, further comprises:
Business module is used for after ascending time slot carries out the measurement of ISCP, before the detection descending synchronous code SYNC_DL, judges whether ascending time slot is business time-slot in being enabled in described ascending time slot; At ascending time slot is business time-slot, and when not having business, carries out the detection of SYNC_DL at ascending time slot.
20. as the arbitrary described system of claim 12 to 16, it is characterized in that, further comprise:
Reporting module is used to report the sideslip testing result, described testing result comprise detected SYNC_DL number, detect one of detection number of times, frequency, time slot or its combination of SYNC_DL.
21. as the arbitrary described system of claim 12 to 16, it is characterized in that, further comprise:
Statistical module is used for before determining whether sideslip takes place according to detected SYNC_DL, the number of times of the SYNC_DL that statistics is consecutively detected and/or the number of times summation of the detected SYNC_DL in a period of time; With the number of times summation of the number of times of the SYNC_DL that is consecutively detected and/or the detected SYNC_DL in a period of time as the foundation that determines whether to take place sideslip.
22. as the arbitrary described system of claim 12 to 16, it is characterized in that, described judge module is further used for when determining whether sideslip takes place according to detected SYNC_DL, if detect the SYNC_DL that a base station sends, determines that then the base station of transmission SYNC_DL is the sideslip base station; If detect the SYNC_DL that two and above base station send, determine that then base stations detected is the sideslip base station.
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