CN101179323B - Pulse shaping filtering module, timing transmitting regulation and receive testing method and apparatus - Google Patents
Pulse shaping filtering module, timing transmitting regulation and receive testing method and apparatus Download PDFInfo
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- CN101179323B CN101179323B CN2007101699352A CN200710169935A CN101179323B CN 101179323 B CN101179323 B CN 101179323B CN 2007101699352 A CN2007101699352 A CN 2007101699352A CN 200710169935 A CN200710169935 A CN 200710169935A CN 101179323 B CN101179323 B CN 101179323B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/7163—Spread spectrum techniques using impulse radio
- H04B1/717—Pulse-related aspects
- H04B1/7172—Pulse shape
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/7163—Spread spectrum techniques using impulse radio
- H04B1/717—Pulse-related aspects
- H04B1/7174—Pulse generation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/7163—Spread spectrum techniques using impulse radio
- H04B1/7183—Synchronisation
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The present invention relates to a pulse shaping filtering module, a timed transfer regulating and receiving detecting method and the device. In light of the present invention, the shaping coefficient value of the filter varies according to the time deviation that is decimal times of the regulating unit of regulation timing, so as to obtain the timing effect similar to the actual regulating transfer signal.
Description
Technical field
The present invention relates to wireless communication technology, particularly pulse shaping filtering module, the transmission timing adjusting method that utilizes this filtration module and method of reception timing detection and device.
Background technology
Usually, AD/DA has identical sample rate in portable terminal, and their speed is chip or symbol) 4～8 times of speed.In the most portable terminal, receiving terminal is sampled with the speed of 4 times of symbol rates.(Time Division Duplexing: time division duplex) more outstanding in the system, this is because the cause that Tx and Rx move according to same timing to this tendency at TDD.
Has the closed loop synchronization control function that is used for accurately adjusting uplink synchronisation as TD-SCDMA system based on one of cdma system of TDD, under this situation, the base unit that closed loop is adjusted synchronously is k/8 (value of k is 1～8, notifies indivedual terminals by a network) chip.If the over-sampling rate of terminal is 4, then terminal can the self-synchronous unit of adjustment that adjusts be 1/4 symbol (being chip among the CDMA).And under the situation for TD-SCDMA, when the synchronous unit of adjustment of network was 1/8 (k=1) chip, terminal can not satisfy this condition, therefore may cause decreased performance.
Fig. 1 is the figure that expression comprises the existing transmission end structure of timing controller.
As shown in Figure 1, in existing transmission end, for signal, after modulator (Modulator) 101, in over-sampling end 102, carry out over-sampling, then, under the control of timing controller 104, utilize the regularly timing of the 103 pairs of sample units in adjustment part to adjust, then by pulse shaping filter 105, then, by transmitter (Transmitter) 107, export then by antenna via DAC (digital to analog converter) 106.
In so existing transmission end, with based on the timing unit of adjustment of sample rate, i.e. the integral multiple adjustment timing of 1/ sample rate, under this situation, adopt the method that in sending sample sequence, changes the original position of data to adjust by timing controller 104.
But existing transmission end can not be with the unit adjustment timing littler than the above-mentioned timing unit of adjustment based on sample rate.Thereby there are the following problems: the desired timing adjustment in base station can not accurately be carried out in existing transmission end.
For example, under the situation for TD-SCDMA, the spreading rate that uses is 1.28Mcps, and the sample rate that general terminal is used is 5.12Msps.But, use 10.24Msps in the base station usually, under the base unit adjustment situation regularly that requires to adjust synchronously as above-mentioned closed loop with 1/8 chip units of K=1 in the base station, terminal can not satisfy such item that requires.This restriction element finally causes the increase of multiple access interference (Multiple Access Interference) in the up link, causes link performance and power system capacity to descend.
Summary of the invention
The present invention carries out for addressing the above problem, its purpose is, a kind of pulse shaping filtering module that transmits timing adjusting method and be used for this method is provided, in described transmission timing adjusting method, numeral is regularly changed the reacting condition that brings to analog signal be used for digital signal, thereby irrespectively regulate transmission regularly with the sample rate limit of DAC.
And the present invention also provides a kind of timing detection method and device, is used for obtaining timing signal accurately adjusting under the situation regularly as mentioned above at receiving terminal.
In order to reach aforesaid purpose, the timing adjusting method of an embodiment of the invention, it is characterized in that described timing adjusting method comprises the step of carrying out following processing: will regularly adjust signal based on the decimal sampling of the timing unit of adjustment of sample rate and be input to pulse shaping filter; And the above-mentioned decimal sampling of the breath that believes one side only when comprising is regularly adjusted the filter factor that signal is adjusted above-mentioned pulse shaping filter, in the step of the coefficient of adjusting above-mentioned pulse shaping filter, adjust for above-mentioned pulse shaping filter, make its breath that believes one side only when above-mentioned select different filter factors, thereby carry out filtering according to different modes.
Under this situation, (timing offset) information partially when above-mentioned decimal sampling is regularly adjusted signal and comprised, in the step of the coefficient of adjusting above-mentioned pulse shaping filter, adjust for above-mentioned pulse shaping filter, make its breath that believes one side only when above-mentioned select different filter factors, thereby carry out filtering according to different modes.
On the other hand, the pulse shaping filtering module of another embodiment of the present invention, it is characterized in that, described pulse shaping filtering module comprises the corresponding respectively a plurality of pulse shaping filters of breath that believe one side only when a plurality of, and above-mentioned a plurality of pulse shaping filters have basis and regularly adjust the included time different filter factor of breath that believes one side only of signal based on the decimal sampling of the timing unit of adjustment of sample rate.
Under this situation, above-mentioned decimal sampling is regularly adjusted the breath that believes one side only when signal comprises, above-mentioned a plurality of pulse shaping filters have the different filter factor of breath that believes one side only when above-mentioned.
In addition, the method of reception timing detection of another embodiment of the invention, it is characterized in that described method of reception timing detection comprises the step of carrying out following processing: make received signal via the corresponding respectively a plurality of pulse shaping filters of breath that believe one side only when a plurality of, export as output signal; And utilize to adopt regularly in synchronous estimation method and the ceiling capacity system of selection any one, obtain timing information during best from above-mentioned a plurality of output signals partially.
Under this situation, can adopt regularly in synchronous estimation method and the ceiling capacity system of selection any one to obtain above-mentioned timing information.
At last, the reception of another embodiment of the invention is checkout gear regularly, and it comprises: pulse shaping filtering module, and it comprises the corresponding respectively a plurality of pulse shaping filters of breath that believe one side only when a plurality of; And timing information obtains module, and it utilizes ceiling capacity burst selector and any one in the synchronization estimator regularly, obtains timing information during best from a plurality of output signals of above-mentioned pulse shaping filtering module output partially.
Under this situation, above-mentioned timing information acquisition module can be any one in ceiling capacity burst selector and the timing synchronization estimator.
Description of drawings
Fig. 1 is the figure that expression comprises the existing transmission end structure of timing controller.
Fig. 2 is the figure that the timing controller of expression an embodiment of the invention is designed to the transmission end structure of control impuls shaping filter.
Fig. 3 is the figure at the value of the shaping pulse filter factor of inclined to one side sampling instant of when sampling that represents an embodiment of the invention for example.
Fig. 4 is the figure of pulse shaping filtering module of the transmitting terminal of expression an embodiment of the invention.
Fig. 5 is the reception figure of the structure of checkout gear regularly of the receiving terminal of expression an embodiment of the invention.
Embodiment
Below, with reference to accompanying drawing, describe the preferred embodiments of the present invention in detail.Accompanying drawing and be used to illustrate illustrative embodiments of the present invention in the detailed description of following discloses is not represented unique execution mode that the present invention can implement.
In the following detailed description,, comprise the concrete details item for the ease of intactly understanding the present invention.But those skilled in the art should understand, even there are not these concrete details items also can realize among the present invention.In some cases,, known construction and device is omitted, or be the center, adopt the block diagram form to illustrate with the Core Feature of each construction and device for fear of concept obfuscation of the present invention.In addition, make a general survey of this specification,, use identical Reference numeral, describe for identical inscape.
Fig. 2 is the figure that the timing controller of expression an embodiment of the invention is designed to the transmission end structure of control impuls shaping filter.
The basic comprising of the transmission end structure of an embodiment of the invention shown in Figure 2 is identical with existing transmission end structure shown in Figure 1.But, difference is, timing controller 104 ' not only can be with the integral multiple that regularly is adjusted to based on the timing unit of adjustment of sample rate, can also the regularly little several times of unit of adjustment will be adjusted to regularly, at this moment, regularly adjust in the signal the following timing of decimal point adjust signal be imported into pulse shaping filter 105 ', rather than be imported into regularly adjustment part 103.In addition, change the shaping pulse filter factor when sampling that comprises in the signal is adjusted in the timing below the decimal point that the pulse shaping filter 105 of an embodiment of the invention shown in Figure 2 ' basis receives partially, thereby can obtain as the decimal times effect of output signal being carried out based on the timing unit of adjustment of sample rate of regularly adjusting.
According to when sampling mode of the coefficient value of change pulse shaping filter partially, specify as follows for as mentioned above.
Fig. 3 is the figure at the value of the shaping pulse filter factor of inclined to one side sampling instant of when sampling that represents an embodiment of the invention for example.
Fig. 3 is explanation to 4 sampling rates of the RRC filter applies spreading rate that uses among the 3GPP, is the situation of 5.12Msps and the figure of the method that proposes.Be positioned in 3 signal waveforms shown in Figure 3 the signal indication decimal point of central portion following the time be 0 situation partially, on the contrary, waveform shown in the upper end represent decimal point following the time be 0.5 situation partially, the waveform shown in the bottom be decimal point following the time be-0.5 situation partially.The aforesaid time inclined to one side structure that can adjust below the decimal point is the structure in the Synchronization Control of the base station of accepting 10.24Msps with the terminal of 5.12Msps action.
As shown in Figure 3, in the analog signal side, the time difference of 0.5 sampling shows as the difference of the tap coefficient (tap coefficient) of the RRC filter of sampling instant.Among Fig. 3, dotted line is the moment of actual execution sampling, and as mentioned above, in sampling instant, the value of RRC filter shows different values according to the time inclined to one side value below the decimal point.Its result, in order to carry out the timing adjustment below the decimal point, the tap coefficient of RRC filter constitutes that to be different from regularly be that 0 situation is used, and then can access as the effect of adjusting the real time.
Fig. 4 is the pulse shaping filtering module of the transmitting terminal of expression an embodiment of the invention.
Specifically, following situation shown in Fig. 4: according to for below the decimal point the time partially and regularly the unit of adjusting be divided into N part the interval the time partially institute respectively the coefficient value of correspondence comprise N pulse shaping filter 401-1～401-N, at this moment, be equivalent to 0 partially during the following sampling of each decimal point, 1/N, 2/N ..., (N-1)/the N sampling.
In addition, be set under the situation of N=2, as shown in Figure 3, can set with the time inclined to one side unit below the decimal point of 0.5 sampling, and, also can comprise other pulse shaping filters for the skew of '-' direction, set the skew of-0.5 sampling as shown in Figure 3.
Among Fig. 4, during from the timing adjusted value of timing controller 402 below pulse shaping filtering module 401 input decimal points, from a plurality of filter 401-1～401-N, select corresponding to this filter regularly, carry out filtering, can select by filter factor shown in Figure 3, to carry out the timing adjustment below the decimal point.
And, Fig. 4 illustrates following example, promptly, adopt hardware mode to realize switching and selecting N pulse shaping filter 401-1～401-N according to the time breath that believes one side only below the decimal point, this example only is the notion that is used to illustrate an embodiment of the invention, and for according to the time breath that believes one side only select the mode of different shaping pulse filter factors can adopt hardware mode, also can adopt software mode.
On the other hand, the method of another embodiment of the present invention below is described, in this another execution mode, being adjusted to of aforesaid an embodiment of the invention and the corresponding mode regularly of the little several times of timing unit of adjustment are applied to receiving terminal, to obtain timing information more accurately.
Fig. 5 is the reception figure of the structure of checkout gear regularly that the receiving terminal of an embodiment of the invention is shown.
According to an embodiment of the invention, as shown in Figure 5, receiving terminal also utilizes pulse shaping filtering module 503, and to reduce the error that causes by regularly, this pulse shaping filtering module 503 comprises the filter 503-1～503-N based on N shaping pulse filter factor.
Promptly, can be in the following way: the signal that receives be via after the ADC (analog to digital converter) 502, by all N pulse shaping filter 503-1～503-N, the timing information that utilizes the ceiling capacity detection mode or comprise regularly synchronization estimator etc. obtains module 504, from N signal of output, seek when best partially, use with this best time shaping pulse filtering partially accordingly and export.Usually, the influence that change produced that the channel that timing information in the receiving terminal is greater than by the influence from timing adjusted value of transmission end etc. to be transmitted signal causes, by having the transmission end of structure shown in Figure 4, in order to obtain more accurately regularly from receiving terminal at having adjusted signal regularly, by the structure that comprises a plurality of pulse shaping filters shown in Figure 5, can obtain the regularly timing information of the little several times of unit of adjustment respectively.
As mentioned above, to the detailed description of preferred implementation of the present invention openly to making those skilled in the art realize implementing the present invention.In the above-mentioned explanation, be illustrated with reference to preferred implementation of the present invention, but those skilled in the art should be understood that, in the aim of in not breaking away from claims scope, putting down in writing of the present invention and the scope in field, and can be to the various modifications and changes of the invention process.And, the invention is not restricted to execution mode disclosed herein, but include the wide region consistent with principle shown here and new feature.
As mentioned above, according to an embodiment of the invention, numeral regularly can be changed the reacting condition that brings to analog signal should be in digital signal, can irrespectively regulate with the sample rate limit of DAC and transmit regularly, can easily realize the present invention by the pulse shaping filtering module that is used for this mode.
In addition, as mentioned above, regularly under the situation that obtains adjusting,,, carry out correct timing and detect by comprising the module of a plurality of pulse shaping filters in order to obtain correct timing signal from receiving terminal.
Claims (4)
1. one kind is transmitted timing adjusting method, it is characterized in that described transmission timing adjusting method comprises the step of carrying out following processing:
To regularly adjust signal based on the decimal sampling of the timing unit of adjustment of sample rate and be input to pulse shaping filter; And
The above-mentioned decimal sampling of breath of believing one side only when comprising is regularly adjusted the filter factor that signal is adjusted above-mentioned pulse shaping filter,
In the step of the coefficient of adjusting above-mentioned pulse shaping filter, adjust for above-mentioned pulse shaping filter, make its breath that believes one side only when above-mentioned select different filter factors, thereby carry out filtering according to different modes.
2. a pulse shaping filtering module is characterized in that,
Described pulse shaping filtering module comprises the corresponding respectively a plurality of pulse shaping filters of breath that believe one side only when a plurality of,
Above-mentioned a plurality of pulse shaping filter has according to regularly adjust the included time different filter factor of breath that believes one side only of signal based on the decimal sampling of the timing unit of adjustment of sample rate.
3. a method of reception timing detection is characterized in that, described method of reception timing detection comprises the step of carrying out following processing:
Make received signal via the corresponding respectively a plurality of pulse shaping filters of breath that believe one side only when a plurality of, export as output signal; And
Utilize to adopt regularly in synchronous estimation method and the ceiling capacity system of selection any one, obtain timing information during best from above-mentioned a plurality of output signals partially.
4. one kind receives regularly checkout gear, and this reception regularly checkout gear comprises:
Pulse shaping filtering module, it comprises the corresponding respectively a plurality of pulse shaping filters of breath that believe one side only when a plurality of; And
Timing information obtains module, and it utilizes ceiling capacity burst selector and any one in the synchronization estimator regularly, obtains timing information during best from a plurality of output signals of above-mentioned pulse shaping filtering module output partially.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060110057 | 2006-11-08 | ||
| KR1020060110057A KR101295573B1 (en) | 2006-11-08 | 2006-11-08 | Pulse Shaping Filter Module, Method For Adjusting Transmission Time Using The Same, And Method and Apparatus For Detecting Receiving Timing |
| KR10-2006-0110057 | 2006-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101179323A CN101179323A (en) | 2008-05-14 |
| CN101179323B true CN101179323B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101699352A Expired - Fee Related CN101179323B (en) | 2006-11-08 | 2007-11-08 | Pulse shaping filtering module, timing transmitting regulation and receive testing method and apparatus |
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| Country | Link |
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| KR (1) | KR101295573B1 (en) |
| CN (1) | CN101179323B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005108295A (en) * | 2003-09-29 | 2005-04-21 | Sony Corp | Itr data reproducing device, recording and reproducing system, and interpolation filter |
| CN1719818A (en) * | 2005-07-08 | 2006-01-11 | 广州海格通信有限公司 | A sampling frequency deviation tracking signal processing device and method for an orthogonal frequency division multiplexing system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100302839B1 (en) * | 1998-06-02 | 2001-09-28 | 윤종용 | High-speed symbol timing synchronization method |
| KR100580089B1 (en) * | 1999-12-20 | 2006-05-16 | 주식회사 케이티 | Timing Error Estimation in Orthogonal Frequency Division Multiplexing Using Digital Signal Processor |
| KR20040107562A (en) * | 2003-06-05 | 2004-12-23 | 삼성전자주식회사 | Symbol timing offset estimator of Digital receiver and a method estimating symbol timing offset thereof |
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2006
- 2006-11-08 KR KR1020060110057A patent/KR101295573B1/en not_active IP Right Cessation
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- 2007-11-08 CN CN2007101699352A patent/CN101179323B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005108295A (en) * | 2003-09-29 | 2005-04-21 | Sony Corp | Itr data reproducing device, recording and reproducing system, and interpolation filter |
| CN1719818A (en) * | 2005-07-08 | 2006-01-11 | 广州海格通信有限公司 | A sampling frequency deviation tracking signal processing device and method for an orthogonal frequency division multiplexing system |
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| Publication number | Publication date |
|---|---|
| CN101179323A (en) | 2008-05-14 |
| KR20080041887A (en) | 2008-05-14 |
| KR101295573B1 (en) | 2013-08-09 |
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Inventor after: Lu Lingzhu Inventor before: Lu Lingzhu |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20111207 Termination date: 20171108 |