CN102791023B - Data selecting method and device, the down-sampled system of filtering, terminal - Google Patents
Data selecting method and device, the down-sampled system of filtering, terminal Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of data selecting method and device, the down-sampled system of filtering, terminal.The down-sampled system of its filtering comprises filter, for carrying out filtering to the data of input; Data selection means is serially connected with, this data selection means, for obtaining the timing position of the subframe head of current service cell after filter; And from the filtered data that filter exports, select the data of the timing position of the subframe head of current service cell.The technical scheme of the embodiment of the present invention, the impact of timing position when filtering is down-sampled selecting the data of the timing position of the subframe head of current service cell not to be subject to from filtered data, can flexibly, exactly, the data getting the timing position of the subframe head of current service cell of real-time online, therefore, the technical scheme of the embodiment of the present invention, timing accuracy is higher, timing flexibility is stronger.
Description
Technical field
The embodiment of the present invention relates to communication technical field, particularly relates to a kind of data selecting method and device, the down-sampled system of filtering, terminal.
Background technology
At LTE(Long Term Evolution, Long Term Evolution) in terminal system, after mobile terminal receives the antenna data of network side transmission, antenna data is needed to be converted to base band data, and carry out the down-sampled and filter out-band external noise of filtering, thus export down-sampled after timing data, to meet the functional requirements such as demodulation, measurement, Cell searching and statistics.
In the down-sampled process of filtering of the prior art, from filtering down-sampled time timing position start select and extracted data, and start filtering down-sampled time timing position determine all data be extracted in the down-sampled process of follow-up whole filtering.Start in prior art filtering down-sampled time timing position determine all data be extracted in follow-up whole filtering down-sampled process, such as, in 16 times of down-sampled systems of filtering, suppose that antenna data is from timing position 0Ts position, data timing position after so down-sampled is respectively 0Ts, 16Ts, 32Ts ... .992Ts, 1008Ts when the sub-frame header position that time-frequency synchronization module calculates is 1000Ts, conventional method can only select the data of 992Ts or 1008Ts position, and cannot data that accurately chooser frame header position 1000Ts is corresponding, cause the reduction of 8Ts data precision.Wherein Ts represents sampling time (Time of sample; Ts) interval, such as 32Ts represents that this timing position distance 0Ts is separated by 32 sampling time intervals.
Realizing in process of the present invention, inventor finds at least there is following shortcoming in prior art: in prior art, timing position cannot real time modifying, thus accurately cannot select the data corresponding to timing position, and cause timing accuracy lower, timing flexibility is poor.
Summary of the invention
The embodiment of the present invention provides a kind of data selecting method and device, the down-sampled system of filtering, terminal, in order to improve timing accuracy and the timing flexibility of the down-sampled system of filtering.
On the one hand, the embodiment of the present invention provides a kind of filtering down-sampled system, and the down-sampled system of described filtering comprises filter, for carrying out filtering to the data of input; Data selection means is serially connected with, described data selection means, for obtaining the timing position of the subframe head of current service cell after described filter; And from the filtered data that described filter exports, select the data of the timing position of the subframe head of described current service cell.
On the other hand, the embodiment of the present invention also provides a kind of terminal, is provided with the arbitrary described down-sampled system of filtering of as above claim 1-4 in described terminal.
Again on the one hand, the embodiment of the present invention is a kind of data selecting method also, and described method is applied to the down-sampled system of filtering, the down-sampled system of described filtering comprises filter, described filter is used for carrying out filtering to the data of input, and obtain filtered data, described method comprises:
Obtain the timing position of the subframe head of current service cell;
The data of the timing position of the subframe head of described current service cell are selected from described filtered data..
Another aspect, the embodiment of the present invention also provides a kind of data selection means, and described application of installation is in the down-sampled system of filtering, the down-sampled system of described filtering comprises filter, described filter is used for carrying out filtering to the data of input, and obtain filtered data, described data selection means comprises:
Acquisition module, for obtaining the timing position of the subframe head of current service cell;
Select module, the data of the timing position of the subframe head of the described current service cell obtained for selecting described acquisition module from filtered data.
The data selecting method of the embodiment of the present invention and device, the down-sampled system of filtering, terminal, by being obtained the timing position of the subframe head of current service cell by data selection means; The data of the timing position of the subframe head of current service cell are selected from filtered data.The technical scheme of the embodiment of the present invention, change in prior art start filtering down-sampled time timing position determine all data be extracted in follow-up whole filtering down-sampled process, timing position cannot be revised, thus makes the defect of the data that cannot accurately select timing position corresponding.Adopt the technical scheme of the embodiment of the present invention, the impact of timing position when filtering is down-sampled selecting the data of the timing position of the subframe head of current service cell not to be subject to from filtered data, can flexibly, exactly, the data getting the timing position of the subframe head of current service cell of real-time online, therefore, the technical scheme of the embodiment of the present invention, timing accuracy is higher, timing flexibility is stronger.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the down-sampled system of filtering that Fig. 1 provides for one embodiment of the invention.
The structural representation of the down-sampled system of filtering that Fig. 2 provides for another embodiment of the present invention.
The structural representation of the down-sampled system of filtering that Fig. 3 provides for yet another embodiment of the invention.
The data selection schematic diagram that Fig. 4 provides for the embodiment of the present invention.
Fig. 5 is the structural representation of the down-sampled system of filtering corresponding to the data selection schematic diagram shown in Fig. 4.
The flow chart of the data selecting method that Fig. 6 provides for one embodiment of the invention.
The structural representation of the data selection means that Fig. 7 provides for the embodiment of the present invention.
The application scenarios figure of the data selection means that Fig. 8 provides for the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In prior art, after filtering is down-sampled, the data of 1.4M, 3M, 5M, 10M, 15M or 20M bandwidth can be exported.For the data exporting each bandwidth, all need to arrange timing position when starting filtering, and start filtering time timing position set after, just immobilize, timing position when this starts filtering determines all selections in follow-up whole filtering and the data extracted, make the data that cannot accurately select timing position corresponding, cause timing accuracy lower, timing flexibility is poor.
Further, when needing the data of output multi-channel different bandwidth, because timing position when starting filtering in each road immobilizes, therefore need to arrange the different down-sampled system of filtering of many covers, often overlap the down-sampled system of filtering to sample according to different timing positions, thus adopt the output meeting multichannel data.In the program when needs multichannel band data exports, need to arrange the down-sampled system of many cover filtering, cost is higher.And the filter in the down-sampled system of filtering is the device that power consumption is higher, adopts more filter, power consumption is comparatively large, compares waste resource.
Based on above-mentioned defect, introduce the technical scheme of the embodiment of the present invention, data selection means is introduced in the embodiment of the present invention, this data selection means can in real time, from filtered data, select the data of the timing position of the subframe head of current service cell online, thus on-line tuning timing position in real time, the impact of timing position time not down-sampled by beginning filtering, the data of the timing position of the subframe head of current service cell can be got flexibly, exactly, therefore, the technical scheme of the embodiment of the present invention, timing accuracy is higher, timing flexibility is stronger.
Further, based on above-mentioned data selection means, the down-sampled system of a kind of filtering can also be introduced, and, in the down-sampled system of this filter, be connected in series above-mentioned data selection means after each filter at least two filters of cascade serial connection, select the data of the timing position of the subframe head of current service cell the filtered data that this data selection means can export from the filter be connected in series before data selection means, realize the function of data selection means.Adopt the down-sampled system of this filtering, when needing the data of multichannel different bandwidth, a circuit-switched data is exported after different filters, need during data like this relative to output multi-channel different bandwidth in prior art to arrange for the down-sampled system of many cover filtering, the down-sampled system of filtering that the embodiment of the present invention proposes, owing to being provided with data selection means, the down-sampled system of a set of filtering is only adopted to realize, not only reduce costs, effectively can also reduce power consumption, saving resource.
Below in conjunction with foregoing description, introduce the technical scheme of the embodiment of the present invention in detail.
The structural representation of the down-sampled system of filtering that Fig. 1 provides for one embodiment of the invention.As shown in Figure 1, the down-sampled system of filtering of the present embodiment comprises filter 20, for carrying out filtering to the data of input.After filter 20, be serially connected with data selection means 30, data selection means 30 is for obtaining the timing position of the subframe head of current service cell; And from the filtered data that filter 20 exports, select the data of the timing position of the subframe head of current service cell.
The down-sampled system of filtering of the present embodiment, have employed data selection means, can by obtaining the timing position of the subframe head of current service cell; The data of the timing position of the subframe head of current service cell are selected from filtered data.The technical scheme of the present embodiment, change in prior art start filtering down-sampled time timing position determine all data be extracted in follow-up whole filtering down-sampled process, timing position cannot be revised, thus makes the defect of the data that cannot accurately select timing position corresponding.Adopt the technical scheme of the present embodiment, the impact of timing position when filtering is down-sampled selecting the data of the timing position of the subframe head of current service cell not to be subject to from filtered data, can flexibly, exactly, the data getting the timing position of the subframe head of current service cell of real-time online, therefore, the technical scheme of the present embodiment, timing accuracy is higher, timing flexibility is stronger.
Above-mentioned embodiment illustrated in fig. 1 in comprise a filter for the down-sampled system of filtering and introduce technical scheme of the present invention in detail.
The structural representation of the down-sampled system of filtering that Fig. 2 provides for another embodiment of the present invention.As shown in Figure 2, comprise at least two filters for the down-sampled system of filtering in the present embodiment and introduce technical scheme of the present invention in detail.The down-sampled system of filtering of the present embodiment comprises at least two filters 40, and at least two filters 40 adopt the mode of cascade to be connected in series and form, each filter 40 at least two filters 40, for carrying out filtering to the data of input; Concatenated data choice device 50 after each filter 40 at least two filters 40.Each data selection means 50 is for obtaining the timing position of the subframe head of current service cell; And from the filtered data of data selection means 50 filter 40 output of serial connection before, select the data of the timing position of the subframe head of current service cell.
The down-sampled system of filtering of the present embodiment, have employed data selection means, can by obtaining the timing position of the subframe head of current service cell; The data of the timing position of the subframe head of current service cell are selected from filtered data.The technical scheme of the present embodiment, change in prior art start filtering down-sampled time timing position determine all data be extracted in follow-up whole filtering down-sampled process, timing position cannot be revised, thus makes the defect of the data that cannot accurately select timing position corresponding.Adopt the technical scheme of the present embodiment, the impact of timing position when filtering is down-sampled selecting the data of the timing position of the subframe head of current service cell not to be subject to from filtered data, can flexibly, exactly, the data getting the timing position of the subframe head of current service cell of real-time online, therefore, the technical scheme of the present embodiment, timing accuracy is higher, timing flexibility is stronger.
The structural representation of the down-sampled system of filtering that Fig. 3 provides for yet another embodiment of the invention.As shown in Figure 3, the down-sampled system of filtering of the present embodiment, on above-mentioned basis embodiment illustrated in fig. 2, can also comprise following technical scheme.
Above-mentioned embodiment illustrated in fig. 2 at least two filters 40 in afterbody filter 40 after the data selection means 50 of serial connection from the filtered data that afterbody filter 40 exports, select the data of the timing position of the subframe head of current service cell, the data of this selection are the data of the down-sampled rear output of filtering.
In order to the down-sampled system of the filtering adopting this embodiment illustrated in fig. 2 realizes the output of multichannel band data, as shown in Figure 3, the down-sampled system of filtering of the present embodiment, on above-mentioned basis embodiment illustrated in fig. 2, also comprises at least one output module 60; The connection of each output module 60 and a filter 40 at least two filters 40, for using the filtered data of the filter 40 be connected with output module 60 as exporting data, can only adopt one group of filter to realize the output of multichannel band data like this.The data of such as multiple-channel output can be transferred to frequency deviation estimating modules or demodulation coding module respectively to do corresponding process.
Wherein data selection means 50 is specifically for obtaining the timing position of the subframe head of current service cell from Time and Frequency Synchronization module, and the timing position of this subframe head is calculated by described Time and Frequency Synchronization module; Data selection means 50 also selects the data of the timing position of the subframe head of current service cell from the filtered data that the filter 40 of serial connection before data selection means 50 exports.
And in order to realize the data of bandwidth of the determination exported further, at output module 60 using the filtered data of filter 40 be connected with this output module 60 as exporting before data export, the data selection means pair filtered data of filter 40 be connected with this output module 60 can also be adopted again to carry out down-sampled, to reach the data of the bandwidth determined, and then exported by output module 60.
Adopt the down-sampled system of this filtering, when needing the data of multichannel different bandwidth, a circuit-switched data is exported after different filters, need during data like this relative to output multi-channel different bandwidth in prior art to arrange for the down-sampled system of many cover filtering, the down-sampled system of filtering that the present embodiment proposes, owing to being provided with data selection means, one group of filter is only adopted to realize, not only reduce costs, effectively can also reduce power consumption, saving resource.
Suppose that the sample rate of the down-sampled system AD of filtering is 30.72M, filter needs output 2 circuit-switched data, and a circuit-switched data bandwidth is 10M, for demodulation coding module; Another circuit-switched data bandwidth is 1.4M, for frequency deviation estimating modules.For 10M data, be 2 times of down-sampled relations, namely export one of them point from filtering inside 2 points; For 1.4M data bandwidth, be 16 times of down-sampled relations, namely export one of them point from filtering inside 16 points.The data selection schematic diagram that the embodiment of the present invention as shown in Figure 4 provides, can suppose that the data selection means be connected with every grade of filter all carries out falling the down-sampled of twice, so need four data selection means.And for 10M data, be 2 times of down-sampled relations, so only need a data selection means to realize.Therefore the data selection schematic diagram according to Fig. 4, can design the structural representation of the down-sampled system of filtering as shown in Figure 5.As shown in Figure 5, when realizing down-sampled rear 1.4M band data and exporting, four cascading filters are set respectively, are respectively cascading filter 0, cascading filter 1, cascading filter 2 and cascading filter 3.As shown in Figure 5, four data selection means be connected in series respectively with four cascading filters are data selection means 0, data selection means 1, data selection means 2 and data selection means 3, data selection principle shown in such employing Fig. 4, namely can realize the data of down-sampled rear output 1.4M bandwidth.As shown in Figure 5, when realizing down-sampled rear 10M band data and exporting, only need a cascading filter, i.e. cascading filter 0, and the data selection means 4 to be connected in series with this cascading filter 0, data selection principle shown in such employing Fig. 4, namely can realize the data of down-sampled rear output 10M bandwidth.
Adopt the technical scheme of above-described embodiment, only adopt one group of cascading filter can realize the output of multichannel band data, adopt organize filter respectively to realize the output of multichannel band data compared with, not only reduce costs with prior art more, effectively can also reduce power consumption, saving resource.
The embodiment of the present invention can also provide a kind of terminal, is provided with the down-sampled system of filtering as above in the terminal.In this not go into detail.
The terminal of the present embodiment, by arranging the down-sampled system of above-mentioned filtering wherein, change in prior art start filtering down-sampled time timing position determine all data be extracted in follow-up whole filtering down-sampled process, timing position cannot be revised, thus makes the defect of the data that cannot accurately select timing position corresponding.Adopt the technical scheme of the present embodiment, the impact of timing position when filtering is down-sampled selecting the data of the timing position of the subframe head of current service cell not to be subject to from filtered data, can flexibly, exactly, the data getting the timing position of the subframe head of current service cell of real-time online, therefore, the terminal of the present embodiment, timing accuracy is higher, timing flexibility is stronger.And the terminal of the present embodiment, only adopt one group of cascading filter can realize the output of multichannel band data, adopt organize filter respectively to realize the output of multichannel band data compared with, not only reduce costs with prior art more, effectively can also reduce power consumption, saving resource.
The flow chart of the data selecting method that Fig. 6 provides for one embodiment of the invention.The executive agent of the data selecting method of the present embodiment can be a data selection means.As shown in Figure 1, the data selecting method of the present embodiment is applied to the down-sampled system of filtering, and the down-sampled system of this filtering comprises filter, this filter is used for carrying out filtering to the data of input, obtain filtered data, the data selecting method of the present embodiment, specifically can comprise the steps:
100, data selection means obtains the timing position of the subframe head of current service cell;
Namely current service cell in the present embodiment refers to the community belonging to terminal.
101, data selection means selects the data of the timing position of the subframe head of current service cell from filtered data.
The data selecting method of the present embodiment, data selection means is by obtaining the timing position of the subframe head of current service cell; The data of the timing position of the subframe head of current service cell are selected from filtered data.The technical scheme of the present embodiment, change in prior art start filtering down-sampled time timing position determine all data be extracted in follow-up whole filtering down-sampled process, timing position cannot be revised, thus makes the defect of the data that cannot accurately select timing position corresponding.Adopt the technical scheme of the present embodiment, the impact of timing position when filtering is down-sampled selecting the data of the timing position of the subframe head of current service cell not to be subject to from filtered data, can flexibly, exactly, the data getting the timing position of the subframe head of current service cell of real-time online, therefore, the technical scheme of the present embodiment, timing accuracy is higher, timing flexibility is stronger.
It should be noted that, above-mentioned embodiment illustrated in fig. 6 in step 100 " data selection means obtains the timing position of subframe head of current service cell ", specifically can comprise: data selection means obtains the timing position of the subframe head of current service cell from the Time and Frequency Synchronization module terminal, the timing position of this subframe head is calculated by Time and Frequency Synchronization module, with reference to related art, can not repeat them here in detail.In practical application, the timing position of the subframe head of current service cell can also be obtained from other the timing position of the subframe head of current service cell that can provide, with reference to related art, can illustrate no longer one by one at this in detail.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. various can be program code stored medium.
The structural representation of the data selection means that Fig. 7 provides for the embodiment of the present invention, as shown in Figure 7, the data selection means of the present embodiment is applied to the down-sampled system of filtering, and the down-sampled system of this filtering comprises filter, this filter is used for carrying out filtering to the data of input, obtains filtered data.The data selection means of such as the present embodiment specifically can be applied in the down-sampled system of filtering of above-mentioned Fig. 1-Fig. 3.The data selection means of the present embodiment, specifically can comprise: acquisition module 10 and selection module 11.This acquisition module 10 is for obtaining the timing position of the subframe head of current service cell; Select module 11 to be connected with acquisition module 10, selection module 11 is for the data of the timing position of the subframe head of the current service cell of selecting acquisition module 10 to obtain from filtered data.
The data selection means of the present embodiment, identical with the realization mechanism of above-mentioned related method embodiment by adopting above-mentioned module to realize data selection, with reference to the record of above-mentioned related embodiment, can not repeat them here in detail.
The data selection means of the present embodiment, by the timing position adopting above-mentioned module to realize the subframe head obtaining current service cell; The data of the timing position of the subframe head of current service cell are selected from filtered data.The technical scheme of the present embodiment, change in prior art start filtering down-sampled time timing position determine all data be extracted in follow-up whole filtering down-sampled process, timing position cannot be revised, thus makes the defect of the data that cannot accurately select timing position corresponding.Adopt the technical scheme of the present embodiment, the impact of timing position when filtering is down-sampled selecting the data of the timing position of the subframe head of current service cell not to be subject to from filtered data, can flexibly, exactly, the data getting the timing position of the subframe head of current service cell of real-time online, therefore, the technical scheme of the present embodiment, timing accuracy is higher, timing flexibility is stronger.
It should be noted that, on above-mentioned basis embodiment illustrated in fig. 7, acquisition module 10 is wherein specifically for obtaining the timing position of the subframe head of current service cell from the Time and Frequency Synchronization module in terminal, the timing position of this subframe head is calculated by Time and Frequency Synchronization module, with reference to related art, can not repeat them here in detail.
The technical scheme of above-described embodiment is when specific implementation, acquisition module 10 can adopt software to realize, when software from Time and Frequency Synchronization module obtain current service cell subframe head timing position after, the timing position of the subframe head of this current service cell that can calculate according to Time and Frequency Synchronization module, generate a numeral and select signal, and this data select signal is configured to selection module 11, this data module 11 is specifically as follows an entity apparatus, such as, can adopt the MUX (Multiplexor of standard cell lib; MUX) realize.This selection module 11 selects the data of the timing position of the subframe head of this current service cell of signal behavior according to numeral.Adopt the program, can real-time online ground, obtain the data of the timing position of the subframe head of this current service cell exactly, neatly, timing accuracy is higher, timing flexibility is stronger.
The application scenarios figure of the data selection means that Fig. 8 provides for the embodiment of the present invention.As shown in Figure 8, timing position 0,1,2,3,4,5 represents the position of data respectively.In practical application, after terminal receives aerial signal, first aerial signal is converted into baseband signal, and baseband signal is carried out analog digital (Analog Digital; AD) change, be namely converted to the antenna data of digital form, Time and Frequency Synchronization module receives and resolves antenna data, thus calculates the timing position of the subframe head of current service cell.And from Time and Frequency Synchronization module, the timing position of the subframe head of this current service cell is obtained by data selection means, and select the data of the timing position of the subframe head of this current service cell, adopt the program, can real-time online ground, obtain the data of the timing position of the subframe head of this current service cell exactly, neatly, timing accuracy is higher, timing flexibility is stronger.
Such as: AD sample rate is 30.72M, data bandwidth is 1.4M, namely (every 16 points export 1 point to 16 times of down-sampled relations after filtering, the scope of data selection is 0 ~ 15), suppose that sub-frame header position that Time and Frequency Synchronization module calculates is at 1000Ts, 1000MOD16=8, 8 configurations are selected output circuit to filtering, filtering selects output circuit in every 16 points, to select the 8th point carry out filtering and export, the data timing position that so filtering is down-sampled is 8Ts respectively, 24Ts, 40Ts, 984Ts, 1000Ts, 1016Ts...., as can be seen here, adopt the technical scheme of the present embodiment can get the data of accurate timing position, such as than the timing accuracy height 8Ts of conventional method in background technology.
The method that the embodiment of the present invention provides can be used in various desampling fir filter, comprise: LTE base band is down-sampled, WCDMA(Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) base band is down-sampled, TD-SCDMA(Time Division-Synchronous Code Division MultipleAccess, TD SDMA) base band is down-sampled, CDMA2000(Code Division MultipleAccess 2000, CDMA 2000) base band is down-sampled, WIMAX(Worldwide Interoperabilityfor Microwave Access, worldwide interoperability for microwave accesses) base band is down-sampled waits in filter structure.
Device embodiment described above is only schematic, the unit wherein illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed at least two network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying performing creative labour, are namely appreciated that and implement.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. the down-sampled system of filtering, is characterized in that, the down-sampled system of described filtering comprises filter, for carrying out filtering to the data of input; Data selection means is serially connected with, described data selection means, for obtaining the timing position of the subframe head of current service cell after described filter; And in real time, from the filtered data that described filter exports, select the data of the timing position of the subframe head of described current service cell online.
2. system according to claim 1, is characterized in that, the down-sampled system of described filtering comprises at least two described filters, and at least two described filters adopt the mode of cascade to be connected in series and form;
Described data selection means is serially connected with, described data selection means, for obtaining the timing position of the subframe head of current service cell after each described filter at least two described filters; And from the filtered data that the described filter be connected in series before described data selection means exports, select the data of the timing position of the subframe head of described current service cell.
3. system according to claim 2, is characterized in that, also comprises at least one output module;
Each described output module, is connected with a described filter in described at least two filters, for using the data after the described filter filtering be connected with described output module as exporting data.
4. the system according to claim 2 or 3, it is characterized in that, described data selection means, specifically for obtaining the timing position of the subframe head of current service cell from the Time and Frequency Synchronization module in terminal, the timing position of described subframe head is calculated by described Time and Frequency Synchronization module; And from the filtered data that the described filter be connected in series before described data selection means exports, select the data of the timing position of the subframe head of described current service cell.
5. a terminal, is characterized in that, is provided with the arbitrary described down-sampled system of filtering of as above claim 1-4 in described terminal.
6. a data selecting method, is characterized in that, described method is applied to the down-sampled system of filtering, and the down-sampled system of described filtering comprises filter, and described filter is used for carrying out filtering to the data of input, and obtain filtered data, described method comprises:
Obtain the timing position of the subframe head of current service cell;
In real time, from described filtered data, select the data of the timing position of the subframe head of described current service cell online..
7. method according to claim 6, is characterized in that, the timing position of the subframe head of described acquisition current service cell, comprising:
Obtain the timing position of the subframe head of current service cell from Time and Frequency Synchronization module, the timing position of described subframe head is calculated by described Time and Frequency Synchronization module.
8. a data selection means, is characterized in that, described application of installation is in the down-sampled system of filtering, the down-sampled system of described filtering comprises filter, described filter is used for carrying out filtering to the data of input, and obtain filtered data, described data selection means comprises:
Acquisition module, for obtaining the timing position of the subframe head of current service cell;
Select module, the data of the timing position of the subframe head of the described current service cell selecting described acquisition module to obtain from filtered data in real time, online.
9. device according to claim 8, it is characterized in that, described acquisition module, specifically for obtaining the timing position of the subframe head of current service cell from the Time and Frequency Synchronization module in terminal, the timing position of described subframe head is calculated by described Time and Frequency Synchronization module.
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| CN1972391A (en) * | 2006-03-30 | 2007-05-30 | 北京新岸线软件科技有限公司 | Grounding mobile multimedia broadcasting receiver compatible with digital audio broadcasting |
| CN101414990A (en) * | 2008-12-02 | 2009-04-22 | 北京韦加航通科技有限责任公司 | Method for capturing carrier frequency bias and time delay of single carrier frequency domain equalizing system |
| CN102122996A (en) * | 2011-03-11 | 2011-07-13 | 电信科学技术研究院 | Analog radio frequency signal generation method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1972391A (en) * | 2006-03-30 | 2007-05-30 | 北京新岸线软件科技有限公司 | Grounding mobile multimedia broadcasting receiver compatible with digital audio broadcasting |
| CN101414990A (en) * | 2008-12-02 | 2009-04-22 | 北京韦加航通科技有限责任公司 | Method for capturing carrier frequency bias and time delay of single carrier frequency domain equalizing system |
| CN102122996A (en) * | 2011-03-11 | 2011-07-13 | 电信科学技术研究院 | Analog radio frequency signal generation method and system |
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