CN101771655B - Apparatus and method for estimating channels in digital broadcasting signal receiver - Google Patents
Apparatus and method for estimating channels in digital broadcasting signal receiver Download PDFInfo
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- CN101771655B CN101771655B CN201010001528.2A CN201010001528A CN101771655B CN 101771655 B CN101771655 B CN 101771655B CN 201010001528 A CN201010001528 A CN 201010001528A CN 101771655 B CN101771655 B CN 101771655B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2673—Details of algorithms characterised by synchronisation parameters
- H04L27/2675—Pilot or known symbols
Abstract
The invention discloses an apparatus and method for estimating channel in a multi-carrier receiver. In a channel estimating apparatus of a digital broadcasting signal receiver for processing digital broadcasting signal inserted with at least two or more same successive synchronous signals, the apparatus for estimating channel in the multi-carrier receiver comprises a correlator for calculating the correlation based on the received digital broadcasting and reference synchronous signal; a wave-peak detection unit for detecting the correlation position corresponding with the final synchronous signal in the calculated correlation; a windowing unit for selecting a correlation value of a predetermined interval having the position detected by the wave-peak detection unit from the correlation received from the correlator; a channel estimator for estimating the channel by using the correlation value selected by the windowing portion. Therefore the invention can accurately estimate the channel.
Description
The application is to be the divisional application of the application for a patent for invention that May 21, application number in 2004 are 200410047543.5, denomination of invention is " channel estimating apparatus of digital broadcasting signal receiver and method " applying date.
Technical field
The present invention relates to a kind of channel estimating apparatus and method of digital broadcasting signal receiver, be particularly related to so a kind of channel estimating apparatus and method, for the treatment of single-carrier signal and multi-carrier signal, especially time-domain synchronization OFDM (TDS-OFDM) signal, has wherein inserted continuous synchronization signal to improve the channel estimation ability that receives signal.
Background technology
Fig. 1 is the block diagram that represents conventional general channel estimating apparatus.In Fig. 1, channel estimating apparatus comprises: correlation unit 100, wave-peak detection unit 105, windows units 110, threshold cell 120 and channel estimating unit 130.The calculating that the digital broadcast signal that correlation unit 100 sends by use and the reference sync signal identical with being inserted at first pseudo noise (PN) sequence in digital broadcast signal predetermined during send and receive are scheduled to, calculates correlation.Wave-peak detection unit 105 detects the position of the crest with high correlation, and positional information is sent to windows units 110.The correlation that windows units 110 calculates from correlation unit 100, select the correlation at a certain interval that comprises the position signalling receiving from wave-peak detection unit 105.In the case of lower than a predetermined sending threshold value, threshold cell 120 is removed the correlation signals at the signal selecteed interval from be included in windows units 110 lower than predetermined threshold, to be transferred to channel estimating unit 130.Channel estimating can adopt the conventional several different methods that uses correlation signal.
Fig. 2 A and Fig. 2 B are the frame structure views of digital broadcast signal.Fig. 2 A is the frame structure view of conventional single-carrier signal, and Fig. 2 B is the frame structure view of conventional TDS-OFDM signal.PN sequence is synchronous and channel estimating for signal, and wherein, the PN sequence of inserting in Fig. 2 A and Fig. 2 B is all synchronizing signals.
Fig. 3 is the schematic diagram of the correlation calculated of the correlation unit 100 in Fig. 1.When ask between reference sync signal and the digital broadcast signal of transmission correlation time, there is crest 170 in the point that becomes similar at digital broadcast signal and reference sync signal, channel estimating apparatus utilizes the correlation of crest 170 to carry out channel estimating.But, even if the point of conventional channel estimating apparatus beyond crest also can produce constant noise.
Table 1 has shown the maximum noise value corresponding with the synchronizing information length of the digital broadcast signal sending.In the time that maximum correlation is set as 1, the unit of maximum noise value represents with decibel.
Table 1
Corresponding to the average noise of the correlation of PN sequence length
| PN sequence length | Maximum noise (decibel) |
| 63 | -19.0849 |
| 255 | -23.0254 |
| 511 | -27.7240 |
If comprise 63 code elements in the length of the synchronizing signal of transmission data, maximum noise value is-19.0849 decibels; If field sync signal is 255 code elements, maximum noise value is-23.0254 decibels; If field sync signal is 511 code elements, maximum noise value is-27.7240 decibels.
Because the noise component(s) occurring is removed by the threshold cell 120 in Fig. 1, in the time carrying out channel estimating, just get rid of than the less multipath of noise generating.In addition, in the time calculating the correlation of contiguous TDS-OFDM signal, may produce noise.Thereby the channel estimating of multi-carrier signal receiving system and the ability of equalization are reduced to the degree that can not carry out accurate channel estimating, the problem that has caused the signal receiving performance of multi-carrier signal receiving system to worsen.
Therefore, in order to address the above problem, the applicant has proposed a kind of multiple-carrier signal transmission system, and this system can improve the signal receiving performance of multi-carrier signal receiving system, and it is to the application of Department of Intellectual Property of Korea S patented application number No.01-2002-0064073.The multiple-carrier signal transmission system that No. 2002-64073rd, korean patent application comprises: synchronizing information generation unit, for generating synchronizing information; Synchronizing information copied cells, for copying the synchronizing information of generation; Synchronizing information plug-in unit, the synchronizing information copying for synchronizing information and the synchronizing information copied cells of insert continually synchronizing information generation unit generation before protection interval.Fig. 4 C and Fig. 4 D have exemplarily shown the frame of the TDS-OFDM signal obtaining according to the published content of No. 2002-64073rd, korean patent application, and these frames respectively have the continuous segment of the synchronizing signal of two or three insertions.But, in TDS-OFDM signal, can insert at least two or more continuous synchronization pieces of information.
But, there is such problem: also do not develop so far and be applicable to the applicant's multiple-carrier signal transmission system and can effectively receive the also receiving system of processing signals.
Summary of the invention
Proposing the present invention is above-mentioned deficiency and the other problems in order to solve conventional equipment.An aspect of of the present present invention provides a kind of channel estimating apparatus and method of digital broadcasting signal receiver, it can wherein insert the multi-carrier signal of multiple continuous synchronization signals or accurately detect correlation with the digital broadcast signal of single-carrier signal form transmission by processing, and detects more accurately correlation by reducing threshold value removal noise.
Above-mentioned and other objects and advantage are by providing a kind of channel estimating apparatus for digital broadcasting signal receiver substantially to realize, this channel estimating apparatus is processed the digital broadcast signal that has wherein inserted at least two or more identical and continuous synchronizing signals, it comprises: correlation unit, for calculating correlation according to the digital broadcast signal and the reference sync signal that receive; Wave-peak detection unit, for detection of the position corresponding to the correlation of last synchronizing signal in calculated correlation; Windows units, for the correlation receiving from correlation unit, selects the correlation of the predetermined space that is included in the position detecting in wave-peak detection unit; And channel estimating unit, for using the correlation of being selected by windows units to carry out channel estimating.
Each reference sync signal is each identical with synchronizing signal, and digital broadcast signal is any in single-carrier signal and multi-carrier signal preferably.
In addition, channel estimating apparatus of the present invention also comprises delay cell, for all correlations that occur corresponding to synchronizing signal being deferred to the position that correlation and last synchronizing signal correspondingly occur, wherein, at least one or the mean value of more correlation that windows units can calculate the correlation receiving from correlation unit and receive from delay cell, and select certain intervals, this interval comprises the position detecting from wave-peak detection unit corresponding to the average correlation calculating.
The channel estimation methods of digital broadcasting signal receiver for the treatment of the digital broadcast signal that wherein inserts two or more identical and continuous synchronization signals comprises: correlation calculations step, for calculating correlation according to the digital broadcast signal receiving and reference sync signal; Crest detecting step, for detection of the position corresponding to the correlation of last synchronizing signal in the correlation calculating; Window step, selects the correlation of the predetermined space that is included in the position detecting crest detecting step for the correlation that receives from autocorrelation calculation procedure; And channel estimation steps, for using the correlation of being selected by window step to carry out channel estimating.Each reference sync signal is all identical with synchronizing signal, and digital broadcast signal can be any in single-carrier signal and multi-carrier signal.
Channel estimation methods also comprises delay step, for all correlations that occur corresponding to synchronizing signal being deferred to the position that correlation and last synchronizing signal correspondingly occur, wherein, window step is calculated the correlation that receives from correlation step and at least one or the mean value of more correlation from postponing that step receives, and select certain intervals, this interval to comprise the position detecting from crest detecting step corresponding to the average correlation of calculating.
Channel estimating apparatus for the digital broadcasting signal receiver that can process the digital broadcast signal that wherein inserts two or more identical and continuous synchronization signals comprises: correlation unit, and the digital broadcast signal and the reference sync signal that receive for basis calculate correlation; First window unit, for select the first interval from correlation, this first interval comprise corresponding to the crest of last synchronizing signal and corresponding to this front ghost image (pre-ghost) of last synchronous signal; Second Window unit, for select the second interval from correlation, this second interval comprises corresponding to the crest of the first synchronizing signal in synchronizing signal and corresponding to the rear ghost image (post-ghost) of this first synchronizing signal; Delay cell, for postponing the crest corresponding to the second interval of first synchronizing signal, so that the crest at the second interval drops on the residing position of crest corresponding to the first interval of last synchronizing signal; Linkage unit, for being connected to the first space ends the second interval postponing; Channel estimating unit, carries out channel estimating for the signal that uses the interval that is connected.
Channel estimating apparatus also comprises: front ghost image detecting unit, for detection of the front ghost image of the crest corresponding to last synchronizing signal, and sends to first window unit corresponding information; Rear ghost image detecting unit, for detection of the rear ghost image of the crest corresponding to the first synchronizing signal, and corresponding information is sent to Second Window unit, and reference sync signal is identical with synchronizing signal, and digital broadcast signal is any in single-carrier signal and multi-carrier signal preferably.
Another channel estimation methods of digit broadcasting receiver for the treatment of the digital broadcast signal that wherein inserts two or more identical and continuous synchronization signals comprises: correlation calculations step, for calculating correlation according to the digital broadcast signal receiving and reference signal; First window step, is used for selecting the first interval from correlation, and this first interval comprises corresponding to the crest of last synchronizing signal and corresponding to the front ghost image of last synchronizing signal; Second Window step, for select the second interval from correlation, this second interval comprises corresponding to the crest of the first synchronizing signal and corresponding to the rear ghost image of the first synchronizing signal; Postpone step, be used for postponing the crest corresponding to the second interval of the first synchronizing signal, so that the crest at the second interval drops on the position corresponding to the crest place at the first interval of last synchronizing signal; Connection Step, is used for the second interval postponing to be connected to the end at the first interval; And channel estimation steps, the signal that connects interval for using carries out channel estimating.
This method can also comprise: front ghost image detecting step, is used for detecting the front ghost image corresponding to the crest of last signal, and corresponding information is sent to first window step; Rear ghost image detecting step, be used for detecting the rear ghost image corresponding to the crest of the first synchronizing signal, and corresponding information is sent to Second Window step, and reference sync signal is identical with synchronizing signal, and digital broadcast signal can be any in single-carrier signal and multi-carrier signal.
Accompanying drawing explanation
In conjunction with the drawings specific embodiment of the present invention is described, above-mentioned aspect of the present invention and characteristic can be clearer, wherein:
Fig. 1 is the block diagram that represents normal channel estimation unit;
Fig. 2 A and Fig. 2 B are the frame structure schematic diagrames that represents conventional digital broadcast signal;
Fig. 3 is the schematic diagram of the correlation that calculates in the correlation unit of Fig. 1;
Fig. 4 A to Fig. 4 D is the frame assumption diagram that represents the digital broadcast signal that inserts multiple continuous synchronization signals;
Fig. 5 represents the block diagram of the channel estimating apparatus of digital broadcasting signal receiver according to an embodiment of the invention;
Fig. 6 is the flow chart representing according to the operation of the channel estimating apparatus in Fig. 5 of first embodiment of the invention;
Fig. 7 is the flow chart representing according to the operation of the channel estimating apparatus in Fig. 5 of second embodiment of the invention;
Fig. 8 explains the channel estimating apparatus block diagram of digital broadcasting signal receiver in accordance with another embodiment of the present invention;
Fig. 9 is the flow chart of the operation of the channel estimating apparatus in presentation graphs 8;
Figure 10 A to Figure 10 D is the schematic diagram that represents the channel estimation process based on Fig. 5 to Fig. 7;
Figure 11 A and Figure 11 B are the schematic diagrames that represents the channel estimation process based on Fig. 8 and Fig. 9.
Embodiment
Below in connection with accompanying drawing, the present invention is elaborated.
Fig. 5 is the block diagram representing according to the channel estimating apparatus of the digital broadcasting signal receiver of the embodiment of the present invention.Receiver reception in Fig. 5 the digital broadcast signal of processing single-carrier signal or multi-carrier signal form, wherein, inserted the multiple continuous synchronization signals as shown in Fig. 4 A to Fig. 4 D in single-carrier signal or digital broadcast signal.With reference to figure 5, comprise according to the channel estimating apparatus of the digital broadcasting signal receiver of the present embodiment: correlation unit 200, delay cell 203, wave-peak detection unit 205, windows units 210, threshold cell 220, channel estimating unit 230.Correlation unit 200 receives TDS-OFDM signal, relatively inserts the synchronizing signal of digital broadcast signal and the reference signal identical with the synchronizing signal of inserting, to calculate their correlation.Result of calculation is can occur crest corresponding to each synchronizing signal.Delay cell 203 postpones a synchronizing signal length the crest receiving from correlation unit and sends.In a word, because crest occurs corresponding to continuous synchronizing signal, it is identical with the length of synchronizing signal that the interval between crest becomes, and therefore, if the length of the position delayed sync signal of crest, crest and crest subsequently can be fallen same position.Wave-peak detection unit 205 detects last crest the crest receiving from correlation unit 200.Windows units 210 is calculated the mean value with the correlation of the delay that receives from delay cell 203 from each correlation of correlation unit 200 selective receptions, then selects the interval of the position that wave-peak detection unit 205 detects.In addition, corresponding to from correlation unit 200 selective receptions to correlation, windows units 210 is selected the interval of the position being detected by wave-peak detection unit 205.In the correlation at the interval of having selected, threshold cell 220 is removed the value lower than predetermined threshold.Channel estimating unit 230 receives correlation from threshold cell 220, for channel estimating.
Fig. 6 is the operational flowchart representing according to the channel estimating unit in Fig. 5 of first embodiment of the invention.Correlation unit 200 receiving digital broadcast signals, relatively this digital broadcast signal and reference signal, and calculating correlation (S300), Figure 10 A is the schematic diagram that represents the correlation calculating in the time receiving the digital broadcast signal that wherein inserts two continuous synchronization signals.The noise similar with prior art occurs in crest 700 and 710 outside both, but between crest 700 and 710, obtains a steady state value.Table 2 has been listed the steady state value in the second interval.
Table 2
| Synchronizing information length (code element number) | Steady state value (the amplitude order of magnitude) [decibel] |
| 63 | -35.9868 |
| 255 | -48.1308 |
| 511 | -54.1684 |
As shown in table 2, by inserting continuously two segment sync information, only use the synchronizing information of 63 code elements, even also can be detected lower than the multipath channel of-35 decibels.
Wave-peak detection unit 205 receives the correlation at synchronizing signal interval, detects the position (S310) of the crest 710 occurring corresponding to last continuous synchronization signal.Windows units 210 is from wave-peak detection unit 205 receiving position signals, selects and transmits interval including crest to threshold cell 220 (S320).Figure 10 B is the schematic diagram at the interval 740 selected of windows units 210.Threshold cell 220 is removed the correlation (S330) lower than predetermined threshold.Because the correlation between continuous synchronization signal in interval is conventionally little of ignoring compared with the noise of prior art, thereby threshold value can be less than conventional threshold value.Therefore, even if the little crest of losing due to prior art noise also can be detected.Channel estimating unit 230 receives correlation for channel estimating (S340) from windows units 210.
Fig. 7 is the operational flowchart representing according to channel estimating apparatus in Fig. 5 of second embodiment of the invention.Correlation unit 200 receiving digital broadcast signals, relatively this digital broadcast signal and synchronizing signal, and calculate correlation (S400).Figure 10 A has exemplarily illustrated the correlation of calculating.Wave-peak detection unit 205 receives correlation, detects the position (S410) of the crest occurring corresponding to last continuous synchronization signal.In order to postpone the position to the correlation corresponding to last synchronizing signal corresponding to the position of all correlations of the synchronizing signal of insert continually, set a value (number-1 of the synchronizing signal of insertion), as the initial value (S420) of predetermined variable that determines time of delay.But this process arranges arbitrarily in order to explain operation of the present invention, this process also can adopt additive method.In order to be deferred to corresponding to the correlation of the first synchronizing signal and the corresponding position of correlation of last synchronizing signal, correlation has been delayed a time period (S430) corresponding to N synchronizing signal length doubly.The correlation postponing is sent to windows units 210 (S440).Step S430 and S440 are from subtracting 1 repetition by N.Figure 10 C represents the crest of the correlation occurring at each synchronizing signal position to be deferred to the process of last synchronizing signal position.What Figure 10 C illustrated is that first crest 700 has been delayed the time period of one times time cycle corresponding to a synchronizing signal length, and is moved on the position of last crest 710.As a result, these two synchronizing signals are positioned on the position corresponding to last synchronizing signal.If N is less than 1 in step S455, windows units 210 calculates initial correlation with at least one or the mean value of the correlation more postponing.Windows units 210 selects to be included in the correlation (S470) in the certain intervals of the position detecting in step S410.Figure 10 D represents calculating mean value 720, and selects the schematic diagram of certain intervals 730 corresponding to average correlation.Threshold cell 220 is received in the correlation in the interval of selection, and removes the correlation (S480) that is less than predetermined value.Now, owing to being the constant close to zero corresponding to the correlation of continuous synchronization signal, threshold value can be less than conventional threshold value, and this just can detect the little crest of losing due to prior art noise.Channel estimating unit 230 receives correlation signal for channel estimating (S490) from windows units 210.
Fig. 8 is the schematic diagram that represents the channel estimating apparatus of another embodiment of the present invention.The channel estimating apparatus of Fig. 8 comprises correlation unit 500, front ghost image detecting unit 510, first window unit 520, rear ghost image detecting unit 530, Second Window unit 540, delay cell 550, linkage unit 560, threshold cell 570, channel estimating unit 580.Correlation unit comparative figures broadcast singal and reference sync signal, and calculate correlation.Front ghost image detecting unit 510 receives correlation, detects the front ghost image of the crest occurring corresponding to last synchronizing signal.The window at the first interval that comprises the front ghost image that detects and last synchronizing signal is outputed in first window unit 520.Rear ghost image detecting unit 530 input correlations, and detect the rear ghost image corresponding to the crest of the first synchronizing signal appearance.The window at the second interval of the rear ghost image that comprises primary peak and detect is outputed in Second Window unit 540.What Figure 11 A and Figure 1B illustrated is the correlation in the time there is ghost image in digital broadcast signal.Figure 11 A is Part I and the Part II while representing to select respectively first window unit 520 and Second Window unit 530.Delay cell 550 postpones certain period the crest 800 at the first interval, so that the crest 810 at the first interval arrives the position at crest 800 places at the second interval.The time period postponing is corresponding to the length of total insertion synchronizing signal that therefrom deducts a synchronizing signal.Linkage unit 560 connects two window intervals.The second interval is connected to Part I end.Figure 11 B has represented connection status.Crest 800 present positions at the crest 810 at the first interval and the second interval are identical, therefore occurred crest 820, and the present embodiment adopts the average correlation of these two crests to determine the value of the crest 820 in the interval connecting.570 selections of threshold cell are greater than the value of predetermined threshold, and the value of selecting is sent to channel estimating unit 580, and channel estimating unit 580 is estimated channel.
Fig. 9 is the flow chart of the operation of channel estimating apparatus in key-drawing 8.Channel estimating apparatus receiving digital broadcast signal, by comparative figures broadcast singal and during send and receive predetermined reference sync signal calculate correlation (S600).Channel estimating apparatus detects the front ghost image (S610) of last crest from correlation.Channel estimating apparatus is selected the first interval, and this first interval comprises last crest and the front ghost image (S620) of last.Channel estimating apparatus detects the rear ghost image (S630) of primary peak.This channel estimating apparatus output from primary peak start to comprise primary peak the window (S640) at the second interval of ghost image.Channel estimating apparatus postpones the second interval, so that the crest at the second interval drops on the position at crest place at the first interval (S650).Channel estimating apparatus is connected to the second interval the end (S660) at the first interval.Figure 11 B is the schematic diagram that represents connection status.In Figure 11 B, to overlapping crest 820, calculate the mean value of the correlation of the crest 810 at the first interval and the crest 800 at the second interval, still, can first select the crest at the first interval, also the crest at the second interval first.Channel estimating apparatus only selects the correlation that is greater than predetermined threshold for channel estimating (S670).
As mentioned above, the present invention can be by using continuous PN value, prevent the correlation mistake producing due to adjacent signals, the threshold value that is used for obtaining correlation by reduction accurately detects low correlation, and by obtaining mean value calculation corresponding to the correlation of PN value than the more accurate correlation of prior art.In addition, use the correlation calculating according to the present invention can obtain signal compensation more accurately.
As mentioned above, the present invention can use the correlation of continuous synchronization signal detection corresponding to single synchronizing signal, and can use correlation mean value calculation to go out more accurate correlation.In addition, because synchronizing signal has corresponding to the correlation in the interval of continuous synchronization signal close to zero, in the time calculating correlation, can avoid the noise producing with correlation.In addition, owing to having adopted low threshold value, thereby the noise not being detected in existing mode can be detected easily.
Above-described embodiment and advantage are that some are given an example, and the present invention is not limited to this.The present invention can also be applied to the equipment of other types.In addition, the explanation of the present embodiment is exemplary, the scope that is not limited in claims of the present invention, and obviously those skilled in the art can carry out various changes and modifications.
Claims (10)
1. a digital broadcasting signal receiver, comprising:
Channel estimating apparatus, with receive signal carry out channel estimating,
Wherein, described digital broadcasting signal receiver receives the signal with two or more identical and continuous synchronizing signals,
Wherein, described channel estimating apparatus comprises:
Correlation unit, for calculating correlation according to the signal receiving and reference sync signal;
Wave-peak detection unit, for detection of the position corresponding to the correlation of last synchronizing signal in the correlation calculating;
Windows units, selects the correlation of predetermined space for the correlation receiving from correlation unit, this predetermined space is included in the position detecting in wave-peak detection unit;
Threshold cell, for removing the correlation lower than predetermined threshold;
Channel estimating unit, for using the correlation receiving from threshold cell, carries out channel estimating,
Wherein, described channel estimating apparatus also comprises: delay cell, for the whole correlations that occur corresponding to synchronizing signal being deferred to the position of the correlation occurring corresponding to last synchronizing signal, wherein, windows units is calculated from the correlation of correlation unit reception with from least one of delay cell reception or the mean value of more correlation, and select another predetermined space, this another predetermined space comprises the position that wave-peak detection unit detects corresponding to the average correlation calculating.
2. digital broadcasting signal receiver as claimed in claim 1, wherein, described reference sync signal is identical with synchronizing signal.
3. a digital broadcasting signal receiver, comprising:
Channel estimating apparatus, with receive signal carry out channel estimating,
Wherein, described digital broadcasting signal receiver receives the signal with two or more identical and continuous synchronizing signals,
Wherein, described channel estimating apparatus comprises:
Correlation unit, for signal and reference sync signal based on receiving, calculates correlation;
First window unit, for select the correlation at the first interval from correlation, this first interval comprises corresponding to the crest of last synchronizing signal with corresponding to the front ghost image of this last synchronizing signal;
Second Window unit, for select the second interval from correlation, this second interval comprises corresponding to the crest of the first synchronizing signal in synchronizing signal with corresponding to the rear ghost image of this first synchronizing signal;
Delay cell, for postponing the crest corresponding to the second interval of the first synchronizing signal, so that the crest at the second interval drops on the position corresponding to the crest place at the first interval of last synchronizing signal;
Linkage unit, for being connected to the second interval postponing the end at the first interval; With
Channel estimating unit, carries out channel estimating for the signal that uses the interval being connected.
4. digital broadcasting signal receiver as claimed in claim 3, wherein, described channel estimating apparatus also comprises:
Front ghost image detecting unit: for detection of the front ghost image of the crest corresponding to last synchronizing signal, and corresponding information is sent to first window unit; With
Rear ghost image detecting unit: for detection of the rear ghost image of the crest corresponding to the first synchronizing signal, and corresponding information is sent to Second Window unit.
5. the digital broadcasting signal receiver as described in any one in claim 3-4, wherein, described reference sync signal is identical with synchronizing signal.
6. a digital broadcast signal method of reseptance, comprises the steps:
Channel estimation steps, with receive signal carry out channel estimating,
Wherein, receive the signal with two or more identical and continuous synchronizing signals,
Wherein, described channel estimation steps comprises:
Correlation calculations time step, for calculating correlation according to the signal receiving and reference sync signal;
Crest detects time step, for detection of the position corresponding to the correlation of last synchronizing signal in the correlation calculating;
Window time step, selects the correlation of predetermined space, this predetermined space to comprise by crest and detects the position that time step detects for the correlation receiving from correlation calculations time step;
Correlation is removed time step, for removing the correlation lower than predetermined threshold;
Channel estimating time step, the correlation that using correlation to remove time step provides is carried out channel estimating,
Wherein, described channel estimation steps also comprises: postpone time step, for all correlations that occur corresponding to synchronizing signal being deferred to the position of the correlation correspondingly occurring with last synchronizing signal, wherein, window time step is calculated the correlation that receives from correlation calculations time step and at least one or the mean value of more correlation from postponing that time step receives, and select another predetermined space, this another predetermined space to comprise that crest detects the position that time step detects corresponding to the average correlation calculating.
7. digital broadcast signal method of reseptance as claimed in claim 6, wherein, described reference sync signal is identical with synchronizing signal.
8. a digital broadcast signal method of reseptance, comprises the steps:
Channel estimation steps, with receive signal carry out channel estimating,
Wherein, receive the signal with two or more identical and continuous synchronizing signals,
Wherein, described channel estimation steps comprises:
Correlation calculations time step, calculates correlation for the signal based on receiving and reference sync signal;
First window time step, for select the correlation at the first interval from correlation, this first interval comprises corresponding to the crest of last synchronizing signal with corresponding to the front ghost image of this last synchronizing signal;
Second Window time step, for select the correlation at the second interval from correlation, this second interval comprises corresponding to the crest of the first synchronizing signal in synchronizing signal with corresponding to the rear ghost image of this first synchronizing signal;
Postpone time step, for postponing the crest corresponding to the second interval of the first synchronizing signal, so that the crest at the second interval drops on the position corresponding to the crest place at the first interval of last synchronizing signal;
Connect time step, for the second interval postponing being connected to the end at the first interval; With
Channel estimating time step, carries out channel estimating for the signal that uses the interval being connected.
9. digital broadcast signal method of reseptance as claimed in claim 8, wherein, described channel estimation steps also comprises:
Front ghost image detects time step, for detection of the front ghost image of the crest corresponding to last synchronizing signal, and corresponding information is sent to first window time step; With
Rear ghost image detects time step, for detection of the rear ghost image of the crest corresponding to the first synchronizing signal, and corresponding information is sent to Second Window time step.
10. the digital broadcast signal method of reseptance as described in any one in claim 8-9, wherein, described reference sync signal is identical with synchronizing signal.
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| KR1020030037821A KR20040107035A (en) | 2003-06-12 | 2003-06-12 | Channel estimater of digital broadcasting signal receiving system and a method thereof |
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| CN200410047543A Expired - Fee Related CN100593311C (en) | 2003-06-12 | 2004-05-21 | Channel estimating device and method for digital broadcast signal receiver |
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| Country | Link |
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| KR (1) | KR20040107035A (en) |
| CN (3) | CN101771655B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11974245B2 (en) | 2016-08-09 | 2024-04-30 | Samsung Electronics Co., Ltd | Method and apparatus for transmitting different uplink control information in wireless communication system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625437B (en) * | 2011-01-28 | 2014-11-05 | 中兴通讯股份有限公司 | Synchronization signal detection method and terminal |
| WO2018030783A1 (en) | 2016-08-09 | 2018-02-15 | 삼성전자 주식회사 | Method and device for channel transmission in wireless cellular communication system |
| KR102355797B1 (en) | 2016-08-09 | 2022-01-26 | 삼성전자 주식회사 | Method and apparatus for channel transmission in wireless cellular communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5499272A (en) * | 1994-05-31 | 1996-03-12 | Ericsson Ge Mobile Communications Inc. | Diversity receiver for signals with multipath time dispersion |
| JPH09294095A (en) * | 1996-04-26 | 1997-11-11 | Oki Electric Ind Co Ltd | Adaptive equalizer |
| US6259724B1 (en) * | 1996-10-18 | 2001-07-10 | Telefonaktiebolaget L M Ericsson (Publ) | Random access in a mobile telecommunications system |
| FR2814877B1 (en) * | 2000-10-02 | 2003-01-03 | Mitsubishi Electric Inf Tech | CHANNEL ESTIMATION SEQUENCE AND METHOD OF ESTIMATING A TRANSMISSION CHANNEL WHICH USES SUCH A CHANNEL ESTIMATION SEQUENCE |
| JP3857528B2 (en) * | 2001-01-12 | 2006-12-13 | 富士通株式会社 | Synchronous detection device |
| US7035353B2 (en) * | 2001-10-24 | 2006-04-25 | Zenith Electronics Corporation | Channel estimation method blending correlation and least-squares based approaches |
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- 2003-06-12 KR KR1020030037821A patent/KR20040107035A/en active Search and Examination
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11974245B2 (en) | 2016-08-09 | 2024-04-30 | Samsung Electronics Co., Ltd | Method and apparatus for transmitting different uplink control information in wireless communication system |
Also Published As
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|---|---|
| KR20040107035A (en) | 2004-12-20 |
| CN101771655A (en) | 2010-07-07 |
| CN1956436B (en) | 2016-09-28 |
| CN1574819A (en) | 2005-02-02 |
| CN100593311C (en) | 2010-03-03 |
| CN1956436A (en) | 2007-05-02 |
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