CN1956436B - The channel estimating apparatus of digital broadcasting signal receiver and method - Google Patents
The channel estimating apparatus of digital broadcasting signal receiver and method Download PDFInfo
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- CN1956436B CN1956436B CN200610162774.XA CN200610162774A CN1956436B CN 1956436 B CN1956436 B CN 1956436B CN 200610162774 A CN200610162774 A CN 200610162774A CN 1956436 B CN1956436 B CN 1956436B
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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
Disclose channel estimating apparatus and the method for estimation of a kind of multi-carrier receiver.For processing in the channel estimating apparatus wherein inserting at least digit signal receiver of the digital broadcast signal of two or more identical and continuous print synchronizing signals, the channel estimating apparatus of multi-carrier receiver includes: correlation unit, for calculating dependency according to the digital broadcast signal received and reference sync signal；Wave-peak detection unit, corresponding to the dependency position of last synchronizing signal in the dependency that detection calculates；Windows units, for selecting the dependency of predetermined space from the dependency that autocorrelation unit receives, this predetermined space is included in the position detected in wave-peak detection unit；Channel estimating unit, for using the dependency selected by windows units to carry out channel estimation.Thus, the present invention can estimate channel accurately.
Description
The application is the divisional application of the application for a patent for invention of filing date on May 21st, 2004, Application No. 200410047543.5, invention entitled " channel estimating apparatus of digital broadcasting signal receiver and method ".
Technical field
The present invention relates to a kind of channel estimating apparatus and the method for digital broadcasting signal receiver, particularly to such a channel estimating apparatus and method, for processing single-carrier signal and multi-carrier signal, especially time-domain synchronization OFDM (TDS-OFDM) signal, wherein inserts continuous synchronization signal to improve the channel estimation ability receiving signal.
Background technology
Fig. 1 is the block diagram of the general channel estimating apparatus representing routine.In Fig. 1, channel estimating apparatus includes: correlation unit 100, wave-peak detection unit 105, windows units 110, threshold cell 120 and channel estimating unit 130.Digital broadcast signal and the reference sync signal identical with pseudo noise (PN) sequence being initially inserted in sending the digital broadcast signal predetermined with reception period that correlation unit 100 is sent by use carry out predetermined calculating, calculate dependency.Wave-peak detection unit 105 detection has the position of the crest of high correlation, and positional information is sent to windows units 110.Windows units 110 selects to include the dependency at a certain interval of the position signalling received from wave-peak detection unit 105 from the dependency that correlation unit 100 calculates.In the case of the sending threshold value predetermined less than, threshold cell 120 is removed from the correlation signal being included in selected interval windows units 110 less than the signal of predetermined threshold, for transmission to channel estimating unit 130.Channel is estimated to use the conventional multiple method using correlation signal.
Fig. 2 A and Fig. 2 B is the frame structure view 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 synchronizes for signal and channel is estimated, wherein, the PN sequence inserted in Fig. 2 A and Fig. 2 B is all synchronizing signal.
Fig. 3 is the schematic diagram of the dependency that the correlation unit 100 in Fig. 1 calculates.When seeking the dependency between reference sync signal and the digital broadcast signal of transmission, becoming similar point at digital broadcast signal with reference sync signal and crest 170 occur, channel estimating apparatus utilizes the dependency of crest 170 to carry out channel estimation.But, even if the point that conventional channel estimating apparatus is beyond crest also can produce constant noise.
Table 1 shows the maximum noise value corresponding with the synchronizing information length of the digital broadcast signal sent.When maximum correlation is set as 1, the unit decibel of maximum noise value represents.
Table 1
Average noise corresponding to the dependency of PN sequence length
| PN sequence length | Maximum noise (decibel) |
| 63 | -19.0849 |
| 255 | -23.0254 |
| 511 | -27.7240 |
If comprising 63 code elements in the length of the synchronizing signal of transmission data, then maximum noise value is-19.0849 decibels；If field sync signal is 255 code elements, then maximum noise value is-23.0254 decibels；If field sync signal is 511 code elements, then maximum noise value is-27.7240 decibels.
Noise component(s) owing to occurring is removed by the threshold cell 120 in Fig. 1, when performing channel estimation, just eliminates the multipath less than the noise generated.It addition, when calculating the dependency of neighbouring TDS-OFDM signal, noise may be produced.Thus, the channel of multi-carrier signal reception system estimates and the ability of equalization is reduced to carry out the degree of accurate channel estimation, result in multi-carrier signal and receives the problem that the signal receiving performance of system deteriorates.
Therefore, in order to solve the problems referred to above, present applicant has proposed a kind of multiple-carrier signal transmission system, this system can improve multi-carrier signal and receive the signal receiving performance of system, and it is to Korean Intellectual Property Office's application patented application number No.01-2002-0064073.The multiple-carrier signal transmission system that korean patent application the 2002-64073rd includes: synchronizing information signal generating unit, is used for generating synchronizing information；Synchronizing information copied cells, for replicating the synchronizing information of generation；Synchronizing information inserts unit, the synchronizing information that the synchronizing information generated for insert continually synchronizing information signal generating unit before protection interval and synchronizing information copied cells replicate.Fig. 4 C and Fig. 4 D exemplarily shows the frame of the TDS-OFDM signal of the announcement content acquisition according to korean patent application the 2002-64073rd, and these frames respectively have the continuous segment of two or three synchronizing signals inserted.But, TDS-OFDM signal may be inserted at least two or more continuous synchronization pieces of information.
But, there is the problem that and the most do not develop the multiple-carrier signal transmission system being applicable to the applicant and the receiving system that can effectively receive and process signal.
Summary of the invention
Proposing the present invention is to solve the above-mentioned deficiency of conventional equipment and other problems.An aspect of of the present present invention provides a kind of channel estimating apparatus and the method for digital broadcasting signal receiver, it by processing the multi-carrier signal wherein inserting multiple continuous synchronization signal or can accurately detect dependency with the digital broadcast signal of single-carrier signal format transmission, and detects dependency more accurately by reducing threshold value removal noise.
Above-mentioned and other purposes and advantage are by providing a kind of channel estimating apparatus for digital broadcasting signal receiver substantially to realize, this channel estimating apparatus processes and wherein inserts at least two or multiple identical and digital broadcast signals of continuous print synchronizing signal, it includes: correlation unit, for calculating dependency according to the digital broadcast signal received and reference sync signal；Wave-peak detection unit, corresponding to the position of dependency of last synchronizing signal in the dependency that calculated of detection；Windows units, in the dependency received from correlation unit, is optionally comprised in the dependency of the predetermined space of the position detected in wave-peak detection unit；And channel estimating unit, for using the dependency selected by windows units to carry out channel estimation.
Each reference sync signal is each identical with synchronizing signal, and digital broadcast signal is preferably any one in single-carrier signal and multi-carrier signal.
In addition, the channel estimating apparatus of the present invention also includes delay cell, for the position that all correlation delay occurred corresponding to synchronizing signal are correspondingly occurred to dependency and last synchronizing signal, wherein, windows units can calculate the dependency received from correlation unit and at least one or the meansigma methods of more dependency that receive from delay cell, and selecting certain intervals, this interval includes the position detected corresponding to the average correlation calculated from wave-peak detection unit.
Include for processing the channel estimation methods of the digital broadcasting signal receiver of the digital broadcast signal wherein inserting two or more identical and continuous synchronization signal: correlation calculations step, for calculating dependency according to the digital broadcast signal received and reference sync signal；Crest detecting step, corresponding to the position of dependency of last synchronizing signal in the dependency that calculates of detection；Window step, for being optionally comprised in crest detecting step the dependency of the predetermined space of the position detected from the dependency that autocorrelation calculation procedure receives；And channel estimation steps, for using the dependency selected by window step to carry out channel estimation.Each reference sync signal is all identical with synchronizing signal, and digital broadcast signal can be any one in single-carrier signal and multi-carrier signal.
Channel estimation methods also includes postponing step, for the position that all correlation delay occurred corresponding to synchronizing signal are correspondingly occurred to dependency and last synchronizing signal, wherein, window step calculates the dependency that receives from correlation step and from least one postponing that step receives or the meansigma methods of more dependency, and selecting certain intervals, this interval includes the position detected corresponding to the average correlation calculated from crest detecting step.
Include for the channel estimating apparatus of the digital broadcasting signal receiver of the digital broadcast signal wherein inserting two or more identical and continuous synchronization signal can be processed: correlation unit, for calculating dependency according to the digital broadcast signal received and reference sync signal；First window unit, for selecting the first interval from dependency, this first interval include the crest corresponding to last synchronizing signal and corresponding to this last front ghost image (pre-ghost) of signal synchronized；Second windows units, for selecting the second interval from dependency, this second interval includes the crest corresponding to the first synchronizing signal in synchronizing signal and the rear ghost image (post-ghost) corresponding to this first synchronizing signal；Delay cell, for postponing the crest at the second interval corresponding to first synchronizing signal, so that the crest at the second interval falls in the crest location corresponding to the first interval of last synchronizing signal；Connect unit, for the second interval postponed is connected to the first space ends；Channel estimating unit, for using the signal at the interval that is connected to carry out channel estimation.
Channel estimating apparatus also includes: front ghost image detector unit, for detecting the front ghost image of the crest corresponding to last synchronizing signal, and corresponding information is sent to first window unit；Rear ghost image detector unit, for detecting the rear ghost image of the crest corresponding to the first synchronizing signal, and corresponding information is sent to the second windows units, reference sync signal is identical with synchronizing signal, and digital broadcast signal is preferably any one in single-carrier signal and multi-carrier signal.
Include for processing another channel estimation methods of the digit broadcasting receiver of the digital broadcast signal wherein inserting two or more identical and continuous synchronization signal: correlation calculations step, for calculating dependency according to the digital broadcast signal received and reference signal；First window step, is used for selecting the first interval from dependency, and this first interval includes the crest corresponding to last synchronizing signal and the front ghost image corresponding to last synchronizing signal；Second window step, for selecting the second interval from dependency, this second interval includes the crest corresponding to the first synchronizing signal and the rear ghost image corresponding to the first synchronizing signal；Postpone step, be used for postponing the crest at the second interval corresponding to the first synchronizing signal, so that the crest at the second interval falls on the position at the crest place at the first interval corresponding to last synchronizing signal；Connection Step, is used for the second interval postponed to be connected to the end at the first interval；And channel estimation steps, for using the signal connecting interval to carry out channel estimation.
This method can also include: front ghost image detecting step, is used for detecting the front ghost image of the crest corresponding to last signal, and corresponding information is sent to first window step；Rear ghost image detecting step, it is used for detecting the rear ghost image of the crest corresponding to the first synchronizing signal, and corresponding information is sent to the second window step, reference sync signal is identical with synchronizing signal, and digital broadcast signal can be any one in single-carrier signal and multi-carrier signal.
Accompanying drawing explanation
Describing only certain embodiments of the present invention by combining accompanying drawing, aforementioned aspect of the present invention and characteristic can be clearer, wherein:
Fig. 1 is the block diagram representing normal channel estimation unit；
Fig. 2 A and Fig. 2 B is the frame structure schematic diagram representing conventional numerical broadcast singal；
Fig. 3 is the schematic diagram of the dependency calculated in the correlation unit of Fig. 1；
Fig. 4 A to Fig. 4 D is the frame assumption diagram representing the digital broadcast signal inserting multiple continuous synchronization signals；
Fig. 5 is the block diagram representing the channel estimating apparatus of digital broadcasting signal receiver according to an embodiment of the invention；
Fig. 6 is the flow chart of the operation representing the channel estimating apparatus in Fig. 5 according to a first embodiment of the present invention；
Fig. 7 is the flow chart of the operation representing the channel estimating apparatus in Fig. 5 according to a second embodiment of the present invention；
Fig. 8 is the channel estimating apparatus block diagram explaining digital broadcasting signal receiver in accordance with another embodiment of the present invention；
Fig. 9 is the flow chart of the operation representing the channel estimating apparatus in Fig. 8；
Figure 10 A to Figure 10 D is the schematic diagram representing channel estimation process based on Fig. 5 to Fig. 7；
Figure 11 A and Figure 11 B is the schematic diagram representing channel estimation process based on Fig. 8 and Fig. 9.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated.
Fig. 5 is the block diagram of the channel estimating apparatus representing digital broadcasting signal receiver according to embodiments of the present invention.Receptor in Fig. 5 receives and processing single-carrier signal or the digital broadcast signal of multi-carrier signal form, wherein, inserts 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 Fig. 5, include 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, compares and inserts the synchronizing signal of digital broadcast signal and the reference signal identical with the synchronizing signal inserted, to calculate their dependency.Result of calculation is, crest can occurs corresponding to each synchronizing signal.Delay cell 203 postpones a synchronizing signal length from the crest that correlation unit receives and sends.In a word, owing to crest occurs corresponding to continuous print synchronizing signal, the interval between crest becomes identical with the length of synchronizing signal, and therefore, if the length of the position delayed sync signal of crest, then crest and crest subsequently can fall same position.Wave-peak detection unit 205 detects last crest from the crest that correlation unit 200 receives.Windows units 210 calculates the meansigma methods selecting each dependency and the dependency of the delay received from delay cell 203 received from correlation unit 200, the then interval of the position that selection wave-peak detection unit 205 detects.It addition, corresponding to the dependency received from correlation unit 200 selection, windows units 210 selects the interval of the position detected by wave-peak detection unit 205.In the dependency at the interval selected, threshold cell 220 removes the value less than predetermined threshold.Channel estimating unit 230 receives dependency from threshold cell 220, estimates for channel.
Fig. 6 is the operational flowchart representing the channel estimating unit in Fig. 5 according to a first embodiment of the present invention.Correlation unit 200 receives digital broadcast signal, relatively this digital broadcast signal and reference signal, and calculating dependency (S300), Figure 10 A is the schematic diagram representing the dependency calculated when receiving the digital broadcast signal wherein inserting two continuous synchronization signals.The noise similar with prior art occurs outside both crests 700 and 710, but obtains a steady state value between crest 700 and 710.Table 2 lists 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 two segment sync information continuously, only use the synchronizing information of 63 code elements, even the multipath channel less than-35 decibels also can be detected.
Wave-peak detection unit 205 receives the dependency at synchronizing signal interval, detects the position (S310) of the crest 710 occurred corresponding to last continuous synchronization signal.Windows units 210 from wave-peak detection unit 205 receiving position signal, select and transmit including crest interval to threshold cell 220 (S320).Figure 10 B is the schematic diagram at the interval 740 that windows units 210 selects.Threshold cell 220 removes the dependency (S330) less than predetermined threshold.Can ignore to compared with the noise of prior art because the dependency in interval is the least between continuous synchronization signal, thus threshold value can be less than regulatory thresholds.Therefore, even if the little crest lost due to prior art noise can also be detected.Channel estimating unit 230 receives dependency from windows units 210 and estimates (S340) for channel.
Fig. 7 is to represent the operational flowchart of channel estimating apparatus in Fig. 5 according to a second embodiment of the present invention.Correlation unit 200 receives digital broadcast signal, compares this digital broadcast signal and synchronizing signal, and calculates dependency (S400).Figure 10 A exemplarily illustrates the dependency of calculating.Wave-peak detection unit 205 receives dependency, detects the position (S410) of the crest occurred corresponding to last continuous synchronization signal.The position of position to the dependency corresponding to last synchronizing signal in order to postpone all dependencys of the synchronizing signal corresponding to insert continually, set a value (number-1 of the synchronizing signal of insertion), as the initial value (S420) of the predetermined variable determining time delay.But, this process is in order to explain the operation of the present invention and arbitrarily to arrange, and this process may be used without additive method.In order to will correspond to the correlation delay of the first synchronizing signal to position corresponding with the dependency of last synchronizing signal, dependency is delayed by a time period (S430) corresponding to the synchronizing signal length of N times.The dependency postponed is sent to windows units 210 (S440).Step S430 and S440 are from by the N repetition that subtracts 1.Figure 10 C represents that the crest by the dependency occurred at each synchronizing signal position is deferred to the process of last synchronizing signal position.Figure 10 C illustrates that first crest 700 is delayed by 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, the two synchronizing signal is positioned at corresponding on the position of last synchronizing signal.If N is less than 1 in step S455, then windows units 210 calculates initial relevance and at least one or the meansigma methods of the more dependency postponed.The dependency (S470) that windows units 210 is optionally comprised in the certain intervals of the position detected in step S410.Figure 10 D is to represent calculating meansigma methods 720, and selects the schematic diagram of certain intervals 730 corresponding to average correlation.Threshold cell 220 receives the dependency in the interval selected, and removes the dependency (S480) less than predetermined value.Now, owing to being close to the constant of zero corresponding to the dependency of continuous synchronization signal, threshold value can be less than conventional threshold value, and this just can detect the little crest lost due to prior art noise.Channel estimating unit 230 receives correlation signal from windows units 210 and estimates (S490) for channel.
Fig. 8 is the schematic diagram of the channel estimating apparatus representing another embodiment of the present invention.The channel estimating apparatus of Fig. 8 includes correlation unit 500, front ghost image detector unit 510, first window unit 520, rear ghost image detector unit the 530, second windows units 540, delay cell 550, connects unit 560, threshold cell 570, channel estimating unit 580.Correlation unit compares digital broadcast signal and reference sync signal, and calculates dependency.Front ghost image detector unit 510 receives dependency, the front ghost image of the crest that detection occurs corresponding to last synchronizing signal.First window unit 520 outputs the window at the first interval including front ghost image and the last synchronizing signal detected.Rear ghost image detector unit 530 input correlation, and detect the rear ghost image of the crest occurred corresponding to the first synchronizing signal.Second windows units 540 outputs the window at the second interval including primary peak and the rear ghost image that detects.Figure 11 A and Figure 11 B explanation is the dependency when there is ghost image in digital broadcast signal.Figure 11 A is to represent Part I when selecting first window unit 520 and the second windows units 530 respectively and Part II.The crest 800 at delay cell 550 first interval postpones certain period, so that the crest 810 at the first interval arrives the position at crest 800 place at the second interval.The time period postponed is corresponding to the length of the total insertion synchronizing signal therefrom deducting a synchronizing signal.Connect unit 560 and connect two window intervals.Second interval is connected to Part I end.Figure 11 B illustrates connection status.The crest 810 at the first interval and crest 800 present position at the second interval are identical, therefore occur in that crest 820, and the present embodiment uses the average correlation of the two crest to determine the value of the crest 820 in the interval of connection.Threshold cell 570 selects the value more than predetermined threshold, and the value selected is sent to channel estimating unit 580, and channel estimating unit 580 estimates channel.
Fig. 9 is to explain the flow chart of the operation of channel estimating apparatus in Fig. 8.Channel estimating apparatus receives digital broadcast signal, by comparing digital broadcast signal and calculating dependency (S600) sending the reference sync signal predetermined with reception period.Channel estimating apparatus detects the front ghost image (S610) of last crest from dependency.Channel estimating apparatus selects the first interval, and this first interval includes last crest and the front ghost image (S620) of last.The rear ghost image (S630) of channel estimating apparatus detection primary peak.This channel estimating apparatus outputs the window (S640) starting the second interval to the rear ghost image including primary peak from primary peak.Channel estimating apparatus postpones the second interval, so that the crest at the second interval falls on the position at the crest place at the first interval (S650).Channel estimating apparatus is connected to the end (S660) at the first interval the second interval.Figure 11 B is the schematic diagram representing connection status.To overlapping crest 820 in Figure 11 B, calculate the meansigma methods of the dependency of the crest 810 at the first interval and the crest 800 at the second interval, however, it is possible to first select the crest at the first interval, it is also possible to the crest at the first second interval.Channel estimating apparatus only selects to estimate (S670) more than the dependency of predetermined threshold for channel.
As mentioned above, the present invention can be by using continuous print PN value, prevent the dependency mistake produced due to adjacent signals, low correlation is accurately detected for the threshold value obtaining dependency by reducing, and by obtaining the mean value calculation dependency more accurate than prior art corresponding to the dependency of PN value.Signal compensation more accurately can be obtained according to the calculated dependency of the present invention it addition, use.
As it has been described above, the present invention can use continuous print synchronization signal detection corresponding to the dependency of single synchronizing signal, and dependency mean value calculation can be used to go out more accurate dependency.Further, since synchronizing signal has the advantages that the dependency in the interval corresponding to continuous synchronization signal is close to zero, when calculating dependency, the noise produced with dependency can be avoided.Additionally, due to have employed Low threshold, it is thus possible to the noise being not detected in known manner detected easily.
Above-described embodiment and advantage are some citings, and the present invention is not limited to this.Present invention can also apply to other kinds of equipment.It addition, the explanation of the present embodiment is the most exemplary, the scope being not limited in claims of the present invention, it is clear that those skilled in the art can carry out various changes and modifications.
Claims (20)
1. a digital broadcasting signal receiver, including:
Channel estimating apparatus, uses the digital broadcast signal received to perform channel and estimates,
Wherein, described digital broadcasting signal receiver receives and has two or more continuous print synchronizing signals
Signal,
Wherein, described channel estimating apparatus includes:
Correlation unit, for calculating dependency according to the digital broadcast signal received and reference sync signal；
Wave-peak detection unit, corresponding to last synchronizing signal in the dependency that detection calculates
The position of dependency；
Windows units, for selecting the dependency of predetermined space from the dependency that correlation unit receives,
This predetermined space is included in the position detected in wave-peak detection unit；
Channel estimating unit, for using the dependency selected by windows units, carries out channel estimation；
Delay cell, for will correspond to whole correlation delay of synchronizing signal appearance to corresponding to finally
The position of the dependency of one synchronizing signal appearance, wherein windows units calculates the phase received from correlation unit
At least one or the meansigma methods of more dependency that Guan Xinghe receives from delay cell, and select certain
Interval, this interval includes the position that the average correlation that wave-peak detection unit corresponds to calculate detects.
2. digital broadcasting signal receiver as claimed in claim 1, wherein, described reference sync signal
Identical with synchronizing signal.
3. a digital broadcasting signal receiver, including:
Channel estimating apparatus, uses the digital broadcast signal received to perform channel and estimates,
Wherein, described digital broadcasting signal receiver receives and has two or more continuous print synchronizing signals
Signal,
Wherein, described channel estimating apparatus includes:
Correlation unit, for based on the digital broadcast signal received and reference sync signal, calculates dependency；
First window unit, for selecting the dependency at the first interval from dependency, this first interval includes
Crest corresponding to last synchronizing signal and the front ghost image corresponding to this last synchronizing signal；
Second windows units, for selecting the dependency at the second interval from dependency, this second interval includes
Corresponding to the crest of the first synchronizing signal in synchronizing signal and rear heavy corresponding to this first synchronizing signal
Shadow；
Delay cell, for postponing the crest at the second interval corresponding to the first synchronizing signal, so that second
The crest at interval falls on the position at the crest place at the first interval corresponding to last synchronizing signal；
Connect unit, for the second interval postponed being connected to the end at the first interval；With
Channel estimating unit, for using the signal at connected interval to carry out channel estimation.
4. digital broadcasting signal receiver as claimed in claim 3, wherein, described channel estimating apparatus
Also include:
Front ghost image detector unit: for detecting 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 detector unit: for detecting the rear ghost image of the crest corresponding to the first synchronizing signal, and handle
Corresponding information is sent to the second windows units.
5. the digital broadcasting signal receiver as according to any one of claim 3-4, wherein, described ginseng
Examine synchronizing signal identical with synchronizing signal.
6. a digital broadcast signal method of reseptance, comprises the steps:
Channel estimation steps, uses the digital broadcast signal received to perform channel and estimates,
Wherein, receive the signal with two or more continuous print synchronizing signals,
Wherein, described channel estimation steps includes:
Correlation calculations time step, for calculating according to the digital broadcast signal received and reference sync signal
Dependency；
Crest detection time step, corresponding to last synchronizing signal in the dependency that detection calculates
The position of dependency；
Window time step, for selecting predetermined space from the dependency that correlation calculations time step receives
Dependency, this predetermined space includes the position detected by crest detection time step；
Channel estimates time step, and the dependency using window time step to select carries out channel estimation；
Postpone time step, for would correspond to all correlation delay that synchronizing signal occurs to last
The position of the dependency that individual synchronizing signal correspondingly occurs, wherein, window time step calculates from dependency meter
Calculate dependency and at least one received from delay time step or more dependency that time step receives
Meansigma methods, and select certain interval, this interval includes that crest detection time step is corresponding to calculating
The position of average correlation detection.
7. digital broadcast signal method of reseptance as claimed in claim 6, wherein, described with reference to synchronizing letter
Number identical with synchronizing signal.
8. a digital broadcast signal method of reseptance, comprises the steps:
Channel estimation steps, uses the digital broadcast signal received to perform channel and estimates,
Wherein, receive the signal with two or more continuous print synchronizing signals,
Wherein, described channel estimation steps includes:
Correlation calculations time step, for calculating based on the digital broadcast signal received and reference sync signal
Dependency；
First window time step, for selecting the dependency at the first interval from dependency, this first interval bag
Include the crest corresponding to last synchronizing signal and the front ghost image corresponding to this last synchronizing signal；
Second window time step, for selecting the dependency at the second interval from dependency, this second interval bag
Include the crest corresponding to the first synchronizing signal in synchronizing signal and rear heavy corresponding to this first synchronizing signal
Shadow；
Postpone time step, for postponing the crest at the second interval corresponding to the first synchronizing signal, so that the
The crest at two intervals falls in the position at the first crest place being spaced corresponding to last synchronizing signal；
Connect time step, for the second interval postponed being connected to the end at the first interval；With
Channel estimates time step, for using the signal at connected interval to carry out channel estimation.
9. digital broadcast signal method of reseptance as claimed in claim 8, wherein, described channel estimates step
Suddenly also include:
Front ghost image detection time step, for detecting 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 detection time step, for detecting the rear ghost image of the crest corresponding to the first synchronizing signal, and
Corresponding information is sent to the second window time step.
10. the digital broadcast signal method of reseptance as according to any one of claim 8-9, wherein, institute
State reference sync signal identical with synchronizing signal.
The digital broadcast signal of the signal that 11. 1 kinds of receptions have two or more continuous print synchronizing signals connects
Receipts machine, including:
Channel estimating apparatus, uses the digital broadcast signal received to perform channel and estimates,
Wherein, described channel estimating apparatus utilizes said two or more continuous print synchronizing signal to perform channel
Estimate,
Wherein, described channel estimating apparatus includes:
Correlation unit, for calculating dependency according to the digital broadcast signal received and reference sync signal；
Wave-peak detection unit, corresponding to last synchronizing signal in the dependency that detection calculates
The position of dependency；
Windows units, for selecting the dependency of predetermined space from the dependency that correlation unit receives,
This predetermined space is included in the position detected in wave-peak detection unit；
Channel estimating unit, for using the dependency selected by windows units, carries out channel estimation；
Delay cell, for will correspond to whole correlation delay of synchronizing signal appearance to corresponding to finally
The position of the dependency of one synchronizing signal appearance, wherein windows units calculates the phase received from correlation unit
At least one or the meansigma methods of more dependency that Guan Xinghe receives from delay cell, and select certain
Interval, this interval includes the position that the average correlation that wave-peak detection unit corresponds to calculate detects.
12. digital broadcasting signal receivers as claimed in claim 11, wherein, described with reference to synchronizing letter
Number identical with synchronizing signal.
The digital broadcast signal of the signal that 13. 1 kinds of receptions have two or more continuous print synchronizing signals connects
Receipts machine, including:
Channel estimating apparatus, uses the digital broadcast signal received to perform channel and estimates,
Wherein, described channel estimating apparatus utilizes said two or more continuous print synchronizing signal to perform channel
Estimate,
Wherein, described channel estimating apparatus includes:
Correlation unit, for based on the digital broadcast signal received and reference sync signal, calculates dependency；
First window unit, for selecting the dependency at the first interval from dependency, this first interval includes
Crest corresponding to last synchronizing signal and the front ghost image corresponding to this last synchronizing signal；
Second windows units, for selecting the dependency at the second interval from dependency, this second interval includes
Corresponding to the crest of the first synchronizing signal in synchronizing signal and rear heavy corresponding to this first synchronizing signal
Shadow；
Delay cell, for postponing the crest at the second interval corresponding to the first synchronizing signal, so that second
The crest at interval falls on the position at the crest place at the first interval corresponding to last synchronizing signal；
Connect unit, for the second interval postponed being connected to the end at the first interval；With
Channel estimating unit, for using the signal at connected interval to carry out channel estimation.
14. digital broadcasting signal receivers as claimed in claim 13, wherein, described channel estimates dress
Put and also include:
Front ghost image detector unit: for detecting 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 detector unit: for detecting the rear ghost image of the crest corresponding to the first synchronizing signal, and handle
Corresponding information is sent to the second windows units.
15. digital broadcasting signal receivers as according to any one of claim 13-14, wherein, institute
State reference sync signal identical with synchronizing signal.
16. 1 kinds for processing the number of the digital broadcast signal with two or more continuous print synchronizing signals
Word broadcast signal received method, comprises the steps:
Channel estimation steps, uses the digital broadcast signal received to perform channel and estimates,
Wherein, described channel estimation steps utilizes said two or more continuous print synchronizing signal to perform channel
Estimate,
Wherein, described channel estimation steps includes:
Correlation calculations time step, for calculating according to the digital broadcast signal received and reference sync signal
Dependency；
Crest detection time step, corresponding to last synchronizing signal in the dependency that detection calculates
The position of dependency；
Window time step, for selecting predetermined space from the dependency that correlation calculations time step receives
Dependency, this predetermined space includes the position detected by crest detection time step；
Channel estimates time step, and the dependency using window time step to select carries out channel estimation；
Postpone time step, for would correspond to all correlation delay that synchronizing signal occurs to last
The position of the dependency that individual synchronizing signal correspondingly occurs, wherein, window time step calculates from dependency meter
Calculate dependency and at least one received from delay time step or more dependency that time step receives
Meansigma methods, and select certain interval, this interval includes that crest detection time step is corresponding to calculating
The position of average correlation detection.
17. digital broadcast signal method of reseptances as claimed in claim 16, wherein, described with reference to synchronizing
Signal is identical with synchronizing signal.
18. 1 kinds for processing the number of the digital broadcast signal with two or more continuous print synchronizing signals
Word broadcast signal received method, comprises the steps:
Channel estimation steps, uses the digital broadcast signal received to perform channel and estimates,
Wherein, described channel estimation steps utilizes said two or more continuous print synchronizing signal to perform channel
Estimate,
Wherein, described channel estimation steps includes:
Correlation calculations time step, for calculating based on the digital broadcast signal received and reference sync signal
Dependency；
First window time step, for selecting the dependency at the first interval from dependency, this first interval bag
Include the crest corresponding to last synchronizing signal and the front ghost image corresponding to this last synchronizing signal；
Second window time step, for selecting the dependency at the second interval from dependency, this second interval bag
Include the crest corresponding to the first synchronizing signal in synchronizing signal and rear heavy corresponding to this first synchronizing signal
Shadow；
Postpone time step, for postponing the crest at the second interval corresponding to the first synchronizing signal, so that the
The crest at two intervals falls in the position at the first crest place being spaced corresponding to last synchronizing signal；
Connect time step, for the second interval postponed being connected to the end at the first interval；With
Channel estimates time step, for using the signal at connected interval to carry out channel estimation.
19. digital broadcast signal method of reseptances as claimed in claim 18, wherein, described channel is estimated
Meter step also includes:
Front ghost image detection time step, for detecting 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 detection time step, for detecting the rear ghost image of the crest corresponding to the first synchronizing signal, and
Corresponding information is sent to the second window time step.
The 20. digital broadcast signal method of reseptances as according to any one of claim 18-19, wherein,
Described reference sync signal is identical with synchronizing signal.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020030037821 | 2003-06-12 | ||
| KR10-2003-0037821 | 2003-06-12 | ||
| KR1020030037821A KR20040107035A (en) | 2003-06-12 | 2003-06-12 | Channel estimater of digital broadcasting signal receiving system and a method thereof |
| CN200410047543A CN100593311C (en) | 2003-06-12 | 2004-05-21 | Channel estimating device and method for digital broadcast signal receiver |
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| CN200410047543A Division CN100593311C (en) | 2003-06-12 | 2004-05-21 | Channel estimating device and method for digital broadcast signal receiver |
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| CN1956436B true CN1956436B (en) | 2016-09-28 |
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| CN201010001528.2A Expired - Fee Related CN101771655B (en) | 2003-06-12 | 2004-05-21 | Apparatus and method for estimating channels in digital broadcasting signal receiver |
| 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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| 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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| CN102625437B (en) * | 2011-01-28 | 2014-11-05 | 中兴通讯股份有限公司 | Synchronization signal detection method and terminal |
| CN109565862B (en) * | 2016-08-09 | 2022-06-10 | 三星电子株式会社 | Channel transmission method and apparatus 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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| 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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| CN101771655B (en) | 2014-05-28 |
| KR20040107035A (en) | 2004-12-20 |
| CN1574819A (en) | 2005-02-02 |
| CN1956436A (en) | 2007-05-02 |
| CN101771655A (en) | 2010-07-07 |
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