CN110224964A - Symbol timing synchronization method, device, receiver device and storage medium - Google Patents
Symbol timing synchronization method, device, receiver device and storage medium Download PDFInfo
- Publication number
- CN110224964A CN110224964A CN201910504362.7A CN201910504362A CN110224964A CN 110224964 A CN110224964 A CN 110224964A CN 201910504362 A CN201910504362 A CN 201910504362A CN 110224964 A CN110224964 A CN 110224964A
- Authority
- CN
- China
- Prior art keywords
- point
- sampled point
- sampled
- sequence
- correlation values
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H04L27/2663—Coarse synchronisation, e.g. by correlation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
This application involves a kind of symbol timing synchronization method, device, receiver is standby and storage medium, receiver device carry out time-domain sampling to the signal received, obtains sequence of time-domain samples；Then, relevant calculation is carried out using preset local sequence and sequence of time-domain samples, obtains the cross correlation value of each sampled point in sequence of time-domain samples；And the cross correlation value based on each sampled point obtains the accumulated correlation values of each sampled point；Accumulated correlation values be sampled point cross correlation value be located at sampled point before default sampled point cross correlation value and；Finally, the corresponding sampled point of maximum value in all accumulated correlation values is determined as destination sample point, and sign synchronization position is determined according to destination sample point.The reception delay of receiver can be reduced using the above method, and can filter out the influence of noise and multipath effect, promotes the accuracy of sign synchronization position, guarantee that receiver data synchronize normally.
Description
Technical field
This application involves depth learning technology fields, more particularly to a kind of symbol timing synchronization method, device, receiver device
And storage medium.
Background technique
Orthogonal frequency division multiplexi (Orthogonal Frequency Division Multiplexing, abbreviation OFDM)
For a kind of multi-carrier modulation technology, it is converted into simultaneously by breaking a channel into several orthogonal sub-channels, and by high-speed data signal
Capable low speed sub-data flow, is then modulated to and is transmitted on each of the sub-channels.Ofdm system has spectrum efficiency high, anti-more
The features such as diameter interference performance is strong, is widely applied in mobile radio communications system.It needs to meet in ofdm system adjacent
The strict orthogonal of sub-channel spectra, so that the deviation to sign synchronization is extremely sensitive, therefore Fast Fourier Transform (Fast
Fourier Transformation, abbreviation FFT) windowing initial position great influence often is caused to system performance, such as
The excessive information received on entire symbol that will will lead to of fruit windowing position deviation malfunctions.
Increase a cyclic prefix (Cyclic Prefix, abbreviation CP) in ofdm system usually before OFDM symbol, it is ideal
Sign synchronization position be CP middle position.In traditional technology, mainly by the auto-correlation algorithm based on training sequence, utilize
The repeatability of training sequence symbols in OFDM symbol realizes frame synchronization using delay auto-correlation algorithm, it is same to find suitable symbol
Step is set.
But when determining sign synchronization position using the above method, since OFDM symbol is by the shadow of noise and multipath effect
It rings, causes identified sign synchronization position not in CP, lead to system data synchronization mistake.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of symbol timing synchronization method, device, receiver device and
Storage medium.
A kind of symbol timing synchronization method, the above method include:
Time-domain sampling is carried out to the signal received, obtains sequence of time-domain samples；
Relevant calculation is carried out using preset local sequence and sequence of time-domain samples, obtains each in sequence of time-domain samples adopt
The cross correlation value of sampling point；
Cross correlation value based on each sampled point obtains the accumulated correlation values of each sampled point；Accumulated correlation values are sampled point
Cross correlation value be located at sampled point before default sampled point cross correlation value and；
The corresponding sampled point of maximum value in all accumulated correlation values is determined as destination sample point, and according to destination sample
Point determines sign synchronization position.
Above-mentioned sequence of time-domain samples includes cyclic prefix CP and long training sequence LTF in one of the embodiments,；It is local
Sequence is identical as LTF.
It is above-mentioned in one of the embodiments, that relevant calculation is carried out using preset local sequence and sequence of time-domain samples,
Obtain the cross correlation value of each sampled point in sequence of time-domain samples, comprising:
According to comprisingRelational expression, calculate ith sample point cross correlation value；
Wherein, r (i+m-N) indicates the sampled value of the i-th+m-N sampled points in sequence of time-domain samples；L (m) indicates local sequence
M-th of value of column.
The above-mentioned cross correlation value based on each sampled point obtains the cumulative phase of each sampled point in one of the embodiments,
Pass value, comprising:
Determine the first sampled point of current accumulated correlation values to be calculated；
Obtain the cross correlation value of each second sampled point in the sliding window before being located at the first sampled point；
The cross correlation value of each second sampled point is added up, the accumulated correlation values of the first sampled point are obtained.
The above-mentioned cross correlation value by each second sampled point adds up in one of the embodiments, obtains first and adopts
The accumulated correlation values of sampling point, comprising:
According to comprisingRelational expression, obtain i-th of first sampled points cumulative correlation
Value；
Wherein L indicates the length of sliding window, and N indicates that the sequence length of LTF, r (i-l+m-N) indicate (i-l+m-N)
The sampled value of a sampled point, l (m) indicate m-th of value of local sequence.
It is above-mentioned in one of the embodiments, that sign synchronization position is determined according to destination sample point, comprising:
The corresponding position of destination sample point is determined as sign synchronization position.
It is above-mentioned in one of the embodiments, that sign synchronization position is determined according to destination sample point, comprising:
According to the accumulated correlation values of each sampled point, sync bit reference is determined from the sampled point in sequence of time-domain samples
Point；Wherein, before sync bit reference point, the corresponding accumulated correlation values of each sampled point are increased continuously, and are joined in sync bit
After examination point, the corresponding accumulated correlation values of each sampled point fluctuate within a preset range；
Sign synchronization position is determined according to sync bit reference point and destination sample point.
The above-mentioned accumulated correlation values according to each sampled point in one of the embodiments, from sequence of time-domain samples
Sync bit reference point is determined in sampled point, comprising:
When S (i)>S (i-1)+Δ and S (i+1)<S (i)+Δ, ith sample point is determined as sync bit reference point；
Wherein, S (i) indicates the accumulated correlation values of ith sample point, and Δ indicates preset threshold value thresholding.
It is above-mentioned in one of the embodiments, that sign synchronization position is determined according to sync bit reference point and destination sample point
It sets, comprising:
By the intermediate samples point between sync bit reference point and destination sample point, it is determined as sign synchronization position.
The above-mentioned intermediate samples by between sync bit reference point and destination sample point in one of the embodiments,
Point is determined as sign synchronization position, comprising:
According to formula psync=floor ([p1+pmax]/2) determine sign synchronization position；
Wherein, psyncFor sign synchronization position, p1For sync bit reference point locations, pmaxFor destination sample point position；
Floor () indicates evidence obtaining function upwards.
The above-mentioned corresponding sampled point of maximum value by each accumulated correlation values is determined as mesh in one of the embodiments,
Mark sampled point, comprising:
When the accumulated correlation values of third sampled point, continuously it is greater than third sampled point and corresponds to all sampled points in search range
Corresponding accumulated correlation values, and when being greater than default accumulated correlation values thresholding, third sampled point is determined as destination sample point.
A kind of sign synchronization device, above-mentioned apparatus include:
Sampling module obtains sequence of time-domain samples for carrying out time-domain sampling to the signal received；
Computing module obtains time domain and adopts for carrying out relevant calculation using preset local sequence and sequence of time-domain samples
The cross correlation value of each sampled point in sample sequence；
Accumulator module obtains the accumulated correlation values of each sampled point for the cross correlation value based on each sampled point；It is cumulative
Correlation be sampled point cross correlation value be located at sampled point before default sampled point cross correlation value and；
Determining module, for the corresponding sampled point of maximum value in all accumulated correlation values to be determined as destination sample point,
And sign synchronization position is determined according to destination sample point.
A kind of receiver device, including memory and processor, memory are stored with computer program, and processor executes meter
The step of realizing above-mentioned symbol timing synchronization method when calculation machine program.
A kind of computer readable storage medium is stored thereon with computer program, when computer program is executed by processor
The step of realizing above-mentioned symbol timing synchronization method.
Above-mentioned symbol timing synchronization method, device, receiver are standby and storage medium, receiver device carry out the signal received
Time-domain sampling obtains sequence of time-domain samples；Then, relevant calculation is carried out using preset local sequence and sequence of time-domain samples,
Obtain the cross correlation value of each sampled point in sequence of time-domain samples；And each sampling is obtained based on the cross correlation value of each sampled point
The accumulated correlation values of point；Accumulated correlation values are the mutual of cross correlation value and the default sampled point before the sampled point of sampled point
The sum of pass value；Finally, the corresponding sampled point of maximum value in all accumulated correlation values is determined as destination sample point, and according to mesh
Mark sampled point determines sign synchronization position.Since receiver device carries out phase in sequence of time-domain samples using preset local sequence
It closes and calculates, can start to be calculated when receiving sequence of time-domain samples, after one section of sequence of lasting reception
It could start to be calculated, therefore the reception delay of receiver can be reduced；Further, receiver device is based on each sampling
The cross correlation value of point obtains the accumulated correlation values of each sampled point, when so that determining sign synchronization position according to accumulated correlation values,
The influence of noise and multipath effect can be filtered out, to improve the accuracy of sign synchronization position, is further ensured that receiver
Data synchronize normally.
Detailed description of the invention
Fig. 1 is the flow diagram of symbol timing synchronization method in one embodiment；
Fig. 2 is the flow diagram of symbol timing synchronization method in another embodiment；
Fig. 3 is the flow diagram of symbol timing synchronization method in another embodiment；
Fig. 4 is the schematic diagram that one embodiment determines sync bit reference point；
Fig. 5 is the structural block diagram of sign synchronization device in one embodiment；
Fig. 6 is the structural block diagram of sign synchronization device in another embodiment；
Fig. 7 is the structural block diagram of sign synchronization device in another embodiment；
Fig. 8 is the internal structure chart of receiver device in one embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
Symbol timing synchronization method provided by the present application, can be applied to receiver device, and above-mentioned receiver device can be macro
The base station equipment of the types such as base station, micro-base station and small base station, it is not limited here；Above-mentioned base station equipment can be mobile communication
Base station equipment in network, the earth station equipment being also possible in satellite communication can also be the equipment in Internet of Things, herein not
It limits.Optionally, the base station can be global system for mobile telecommunications (Global System of Mobile communication,
Abbreviation GSM) or CDMA (Code Division Multiple Access, abbreviation CDMA) in base station (Base
Transceiver Station, abbreviation BTS), it is also possible to wideband code division multiple access (Wideband Code Division
Multiple Access, abbreviation WCDMA) in base station (NodeB, abbreviation NB), can also be the evolved base station in LTE
(Evolutional Node B, abbreviation eNB or eNodeB) perhaps base in relay station or access point or future 5G network
It stands, does not limit herein.
In one embodiment, as shown in Figure 1, providing a kind of symbol timing synchronization method, it is applied to receiver in this way
It is illustrated for equipment, comprising:
S101, time-domain sampling is carried out to the signal received, obtains sequence of time-domain samples.
In a communications system, the bandwidth that channel can be provided is usually more much broader than bandwidth needed for transmitting signal all the way,
If a channel only transmits signal all the way and wastes very much, in order to make full use of the bandwidth of channel, so that it may use
The method of frequency division multiplexing.Ofdm system mainly breaks a channel into several orthogonal sub-channels, and high-speed data signal is converted into parallel
Low speed sub-data flow, be modulated to and transmitted on each of the sub-channels.For example, will be every using OFDM technology in LTE system
A subframe is modulated on 12 mutually orthogonal subcarriers, after receiving end receives signal, makees phase respectively on each subcarrier
The operation integrated after multiplying, so that it may take out the signal that each subcarrier carries respectively；Each subframe includes 7 in LTE system
OFDM symbol, wherein OFDM symbol is the minimum zone in time domain, and an OFDM symbol is greater than 70 microseconds；Each OFDM symbol
One group of orthogonal subcarrier is all corresponded to, by the orthogonality between subcarrier come anti-interference.
Need to meet the strict orthogonal of adjacent sub-channel frequency spectrum in ofdm system, so that the deviation to sign synchronization is extremely quick
Sense, therefore the windowing initial position of Fast Fourier Transform (Fast Fourier Transformation, abbreviation FFT) is often
Great influence can be caused to system performance, if the windowing excessive information received on entire symbol that will will lead to of position deviation goes out
It is wrong.Increase a cyclic prefix (Cyclic Prefix, abbreviation CP) in ofdm system usually before OFDM symbol, it is ideal to accord with
Number sync bit is the middle position of CP.
Specifically, receiver can be adopted first to signal progress time-domain sampling is received by time domain after receiving signal
Sample converts analog signals into digital signal, obtains sequence of time-domain samples.It, can in order to correctly extract waveform parameter from waveform
To select the quantity of sampled point in a cycle to be equal to 2 times of subcarrier highest frequency.In above-mentioned sequence of time-domain samples, it can wrap
The cyclic prefix CP and long training sequence LTF for carrying out sign synchronization are included, wherein cyclic prefix CP and long training sequence LTF can
To be determined according to the coding protocol of OFDM.
S102, relevant calculation is carried out using preset local sequence and sequence of time-domain samples, obtained in sequence of time-domain samples
The cross correlation value of each sampled point.
Wherein, above-mentioned local sequence is related to sequence of time-domain samples, for example, can be according to the LTF in sequence of time-domain samples
It determines, can be formed, be also possible to identical as LTF sequence by two LTF sequence assemblies.
Specifically, when receiver carries out relevant calculation using preset local sequence and sequence of time-domain samples, can will work as
Each value in the sampled value of preceding sampled point and local sequence carries out relevant calculation, obtains the cross correlation value of current sampling point.
Furthermore it is also possible to according to comprisingRelational expression, calculate ith sample point cross-correlation
Value；Wherein, r (i+m-N) indicates the sampled value of the i-th+m-N sampled points in sequence of time-domain samples；L (m) indicates local sequence
M-th of value.
Specifically, it can incite somebody to actionIt is determined as the cross correlation value of ith sample point, it can also be with
Δ (i) is normalized, then normalized value is determined as to the cross correlation value of ith sample point, it is not limited here.
S103, the cross correlation value based on each sampled point obtain the accumulated correlation values of each sampled point；Accumulated correlation values are
The cross correlation value of sampled point be located at sampled point before default sampled point cross correlation value and.
Receiver device can be obtained each after obtaining each cross correlation value based on the cross correlation value of each sampled point
The accumulated correlation values of sampled point, for example, the cross correlation value of continuous multiple sampled points before current sampling point can be carried out tired
Add；There can also be the cross-correlation of wherein several sampled points of fixed intervals in multiple sampled points before current sampling point
Value adds up, for above-mentioned accumulated correlation values method of determination it is not limited here.
It specifically, can be by multiple sampled points when reception and equipment add up to the cross correlation value of multiple sampled points
Cross correlation value is directly summed, and the cross correlation value of multiple sampled points can also be weighted summation according to preset weighted value, right
It is not limited here in above-mentioned summing mode.
Due to the influence of noise or multipath effect, there may be points not of uniform size in the cross correlation value of each sampled point
Peak is added up using the cross correlation value to each sampled point, can allow the spike of cross correlation value caused by noise etc. with
Other cross correlation values near noise are cumulative, so that having filtered out noise and multipath effect in the accumulated correlation values of each sampled point
It influences, more accurate sign synchronization position can be obtained according to accumulated correlation values.
S104, the corresponding sampled point of maximum value in all accumulated correlation values is determined as destination sample point, and according to mesh
Mark sampled point determines sign synchronization position.
Receiver is after the accumulated correlation values for obtaining each sampled point, in available above-mentioned accumulated correlation values most
Big value；For example, the corresponding accumulated correlation values of all sampled points in the sequence of time-domain samples of available preset length, then from upper
It states and seeks maximum value in accumulated correlation values.
Furthermore it is also possible to analyze the accumulated correlation values of each sampled point near current sample values, when one of them
The accumulated correlation values of sampled point are continuously greater than above-mentioned sampled point and correspond to the corresponding cumulative correlation of all sampled points in search range
When being worth, and being greater than default accumulated correlation values thresholding, then it is determined that the accumulated correlation values of above-mentioned sampled point are maximum cumulative correlation
Value, and the sampled point is determined as destination sample point.
The corresponding position of destination sample point can be determined as sign synchronization after destination sample point has been determined by receiver
Position can also combine other decision conditions according to destination sample point, sign synchronization position be determined jointly, for above-mentioned symbol
The method of determination of sync bit is it is not limited here.
Above-mentioned symbol timing synchronization method, receiver device carry out time-domain sampling to the signal received, obtain time-domain sampling sequence
Column；Then, relevant calculation is carried out using preset local sequence and sequence of time-domain samples, obtains each in sequence of time-domain samples adopt
The cross correlation value of sampling point；And the cross correlation value based on each sampled point obtains the accumulated correlation values of each sampled point；Cumulative correlation
Value be sampled point cross correlation value be located at sampled point before default sampled point cross correlation value and；Finally, by all tired
Add the corresponding sampled point of the maximum value in correlation to be determined as destination sample point, and sign synchronization position is determined according to destination sample point
It sets.It, can be when receiving since receiver device carries out relevant calculation in sequence of time-domain samples using preset local sequence
It can start to be calculated when the sample sequence of domain, without that could start to be calculated after one section of sequence of lasting reception, therefore
The reception delay of receiver can be reduced；Further, receiver device is obtained each based on the cross correlation value of each sampled point
The accumulated correlation values of sampled point when so that determining sign synchronization position according to accumulated correlation values, can filter out noise and multipath effect
The influence answered is further ensured that receiver data synchronize normally to improve the accuracy of sign synchronization position.
Fig. 2 is the flow diagram of symbol timing synchronization method in another embodiment；The present embodiment is related to receiver device and obtains
The concrete mode of accumulated correlation values is taken, on the basis of the above embodiments, as shown in Fig. 2, above-mentioned S103 includes:
S201, the first sampled point for determining current accumulated correlation values to be calculated.
The cross correlation value of each second sampled point of S202, acquisition in the sliding window before the first sampled point.
S203, the cross correlation value of each second sampled point is added up, obtains the accumulated correlation values of the first sampled point.
Specifically, it is available to be located at after receiver device determines the first sampled point of accumulated correlation values to be calculated
The cross correlation value of each second sampled point in sliding window before one sampled point.Wherein, above-mentioned sliding window can be used for
Position and the quantity of above-mentioned second sampled value are controlled, the length of above-mentioned sliding window can be determined according to cumulative demand, example
It can be such as a default size, can also be adjusted according to accumulation result, it is not limited here.
Receiver, can be to the mutual of above-mentioned second sampled point after the cross correlation value that each second sampled point has been determined
Pass value adds up, and can directly sum, can also be with weighted sum, it is not limited here for above-mentioned cumulative mode.Further
Above-mentioned accumulation result can be determined as the accumulated correlation values of the first sampled point by ground.
Optionally, receiver device can according to comprisingRelational expression, obtain i-th
The accumulated correlation values of first sampled point；Wherein L indicates the length of sliding window, and N indicates the sequence length of LTF, r (i-l+m-N)
Indicate the sampled value of (i-l+m-N) a sampled point, l (m) indicates m-th of value of local sequence；For example, can incite somebody to actionIt is determined as the accumulated correlation values of i-th of first sampled points, it can also be rightNormalized value is determined as to the accumulated correlation values of i-th of first sampled points after being normalized；It can also beThe accumulated correlation values for determining it as i-th of first sampled points after one constant of increase later, for above-mentioned cumulative
The acquisition modes of correlation are it is not limited here.
Above-mentioned symbol timing synchronization method, receiver device determined by sliding window which cross correlation value is carried out it is cumulative
To the accumulated correlation values of sampled point, so that more acurrate according to the sign synchronization position that accumulated correlation values obtain.
Fig. 3 is the flow diagram of symbol timing synchronization method in another embodiment；The present embodiment is related to receiver according to mesh
Mark sampled point determines the concrete mode of sign synchronization position, on the basis of the above embodiments, as shown in figure 3, above-mentioned S104 packet
It includes:
S301, according to the accumulated correlation values of each sampled point, sync bit is determined from the sampled point in sequence of time-domain samples
Set reference point；Wherein, before sync bit reference point, the corresponding accumulated correlation values of each sampled point are increased continuously, in synchronization
After position reference point, the corresponding accumulated correlation values of each sampled point fluctuate within a preset range.
Since the second half section sequence of CP with LTF sequence is identical, when the value of sampled point is located at the CP of sequence of time-domain samples
When in sequence, a platform effect, each sampled point can be presented in the cross correlation value and accumulated correlation values of each sampled point of acquisition
Accumulated correlation values it is all bigger, and ideal sign synchronization position is in the middle position of CP sequence；Therefore, receiver device exists
When determining sign synchronization position according to destination sample point, a sync bit reference point can be set.Above-mentioned sync bit reference
When point may be considered above-mentioned accumulated correlation values and be fitted to the curve with land regions, above-mentioned curve rises to land regions
When corner position；Before sync bit reference point, the corresponding accumulated correlation values of each sampled point are increased continuously, in sync bit
After setting reference point, the corresponding accumulated correlation values of each sampled point fluctuate within a preset range.
Receiver device, can be by the accumulated correlation values march of each sampled point when determining above-mentioned sync bit reference point
Line fitting, is then handled the curve after fitting to determine point of inflexion on a curve；Optionally, can also to current sampling point with
The variation relation of the accumulated correlation values of front and back sampled point determines above-mentioned sync bit reference point.
Specifically, when S (i)>S (i-1)+Δ and S (i+1)<S (i)+Δ, ith sample point is determined as sync bit
Reference point；Wherein, S (i) indicates the accumulated correlation values of ith sample point, and Δ indicates preset threshold value thresholding.That is, connecing
Receipts machine can set a threshold value thresholding, when the accumulated correlation values of ith sample point are greater than the cumulative correlation of previous sampled point
Value with threshold value thresholding and, it is believed that the accumulated correlation values of each sampled point are increased continuously before ith sample point；If
The sum of the accumulated correlation values of ith sample point and above-mentioned threshold value thresholding greater than the latter sampled point accumulated correlation values, that is,
It says and is not passed persistently along the accumulated correlation values increasing trend of the several sampled points in front in the latter sampled point of ith sample point
Increase, but initially enter land regions, then ith sample point can be determined as to above-mentioned sync bit reference point.
Optionally, receiver device can also be by the initial position of one sync bit reference point of setting, by each
The variation tendency of the accumulated correlation values of sampled point judged, the above-mentioned initial position of progressive updating, when judging to destination sample point,
Namely accumulated correlation values maximum sampled point when, can stop updating.With the accumulated correlation values of each sampled point shown in Fig. 4
For be illustrated.The initial position that sync bit reference point can be set is sampled point 1, and corresponding accumulated correlation values are A, root
According to preset threshold value thresholding M, when the corresponding accumulated correlation values B of sampled point 2 is greater than A+M, then by sync bit reference point
Location updating is sampled point 2；Further, judge whether the accumulated correlation values C of sampled point 3 has been more than B+M, be greater than B+M in C
When, it will be sampled point 3 by the location updating of sync bit reference point；When the accumulated correlation values D of sampled point 4 is less than C+M, keep
The position of current sync bit reference point is sampled point 3；Continue to judge the cumulative correlation of each sampled point after sampled point 4
Value, respectively less than C+M, that is to say, that since sampled point 3, the accumulated correlation values of each sampled point enter land regions；Until judgement
Stop above-mentioned update when to destination sample point, sampled point 3 is determined as sync bit reference point.
S302, sign synchronization position is determined according to sync bit reference point and destination sample point.
Receiver device, can be according to sync bit reference point and destination sample after sync bit reference point has been determined
Point, it is common to determine sign synchronization position.For example, can an optional sampling between sync bit reference point and destination sample point
Intermediate samples point between sync bit reference point and destination sample point can also optionally it is same to be determined as symbol by point
Step is set.
Specifically, receiver device is determining that the above-mentioned centre between sync bit reference point and destination sample point adopts
When sampling point, can according between above-mentioned sync bit reference point and the time interval and neighbouring sample point of destination sample point when
Between be spaced, to determine which sampled point after sync bit reference point is sign synchronization position；It optionally, can be with root
According to formula psync=floor ([p1+pmax]/2) determine sign synchronization position；Wherein, psyncFor sign synchronization position, p1For synchronization
Position reference point position, pmaxFor destination sample point position；Floor () indicates evidence obtaining function upwards.
Above-mentioned symbol timing synchronization method determines sign synchronization position by setting sync bit reference point, keeps call sign same
Step is set compared with destination sample point, the closer middle position with CP sequence, so that receiver symbol synchronous effect is more preferable.
It should be understood that although each step in the flow chart of Fig. 1-3 is successively shown according to the instruction of arrow,
These steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly stating otherwise herein, these steps
Execution there is no stringent sequences to limit, these steps can execute in other order.Moreover, at least one in Fig. 1-3
Part steps may include that perhaps these sub-steps of multiple stages or stage are not necessarily in synchronization to multiple sub-steps
Completion is executed, but can be executed at different times, the execution sequence in these sub-steps or stage is also not necessarily successively
It carries out, but can be at least part of the sub-step or stage of other steps or other steps in turn or alternately
It executes.
In one embodiment, as shown in figure 4, providing a kind of sign synchronization device, comprising: sampling module 10 calculates
Module 20, accumulator module 30 and determining module 40, in which:
Sampling module 10 obtains sequence of time-domain samples for carrying out time-domain sampling to the signal received；
Computing module 20 is obtained for carrying out relevant calculation using preset local sequence and the sequence of time-domain samples
The cross correlation value of each sampled point in the sequence of time-domain samples；
Accumulator module 30 obtains the cumulative correlation of each sampled point for the cross correlation value based on each sampled point
Value；The accumulated correlation values are the mutual of cross correlation value and the default sampled point before the sampled point of the sampled point
The sum of pass value；
Determining module 40, for the corresponding sampled point of maximum value in all accumulated correlation values to be determined as destination sample
Point, and sign synchronization position is determined according to destination sample point.
Sign synchronization device provided by the embodiments of the present application, may be implemented above method embodiment, realization principle and skill
Art effect is similar, and details are not described herein.
In one embodiment, sequence of time-domain samples includes cyclic prefix CP and long training sequence LTF；Local sequence with
LTF is identical.
In one embodiment, on the basis of the above embodiments, above-mentioned computing module 20 is specifically used for: according to comprisingRelational expression, calculate ith sample point cross correlation value；Wherein, r (i+m-N) indicates time-domain sampling
The sampled value of i-th+m-N sampled points in sequence；L (m) indicates m-th of value of local sequence.
In one embodiment, as shown in fig. 6, on the basis of the above embodiments, above-mentioned accumulator module 30 includes:
First determination unit 301, for determining the first sampled point of current accumulated correlation values to be calculated；
Acquiring unit 302, for obtaining each second sampled point in the sliding window before being located at the first sampled point
Cross correlation value；
Summing elements 303 obtain the tired of the first sampled point for the cross correlation value of each second sampled point to add up
Add correlation.
In one embodiment, on the basis of the above embodiments, above-mentioned summing elements 303 are specifically used for: according to comprisingRelational expression, obtain i-th of first sampled points accumulated correlation values；Wherein L indicates sliding
The length of window, N indicate that the sequence length of LTF, r (i-l+m-N) indicate the sampled value of (i-l+m-N) a sampled point, l (m)
Indicate m-th of value of local sequence.
In one embodiment, on the basis of the above embodiments, above-mentioned determining module 40 is specifically used for: by destination sample
The corresponding position of point is determined as sign synchronization position.
In one embodiment, as shown in fig. 7, on the basis of the above embodiments, above-mentioned determining module 40 includes:
Second determination unit 401, for the accumulated correlation values according to each sampled point, from the sampling in sequence of time-domain samples
Sync bit reference point is determined in point；Wherein, before sync bit reference point, the corresponding accumulated correlation values of each sampled point connect
Continuous to be incremented by, after sync bit reference point, the corresponding accumulated correlation values of each sampled point fluctuate within a preset range；
Third determination unit 402 determines sign synchronization position according to sync bit reference point and destination sample point.
In one embodiment, on the basis of the above embodiments, above-mentioned second determination unit 401 is specifically used for: working as S
(i) when>S (i-1)+Δ and S (i+1)<S (i)+Δ, ith sample point is determined as sync bit reference point；Wherein, S (i) table
Show the accumulated correlation values of ith sample point, Δ indicates preset threshold value thresholding.
In one embodiment, on the basis of the above embodiments, above-mentioned third determination unit 402 is specifically used for: by position
Intermediate samples point between sync bit reference point and destination sample point, is determined as sign synchronization position.
In one embodiment, on the basis of the above embodiments, above-mentioned third determination unit 402 is specifically used for: according to
Formula psync=floor ([p1+pmax]/2) determine sign synchronization position；Wherein, psyncFor sign synchronization position, p1For sync bit
Set reference point locations, pmaxFor destination sample point position；Floor () indicates evidence obtaining function upwards.
In one embodiment, on the basis of the above embodiments, above-mentioned determining module 40 is specifically used for: when third samples
The accumulated correlation values of point are continuously greater than third sampled point and correspond to the corresponding accumulated correlation values of all sampled points in search range,
And when being greater than default accumulated correlation values thresholding, third sampled point is determined as destination sample point.
Sign synchronization device provided by the embodiments of the present application, may be implemented above method embodiment, realization principle and skill
Art effect is similar, and details are not described herein.
Specific about sign synchronization device limits the restriction that may refer to above for symbol timing synchronization method, herein not
It repeats again.Modules in above-mentioned sign synchronization device can be realized fully or partially through software, hardware and combinations thereof.On
Stating each module can be embedded in the form of hardware or independently of in the processor in computer equipment, can also store in a software form
In memory in computer equipment, the corresponding operation of the above modules is executed in order to which processor calls.
In one embodiment, a kind of receiver device is provided, internal structure chart can be as shown in Figure 8.The reception
Machine equipment includes processor, memory, network interface and the database connected by system bus.Wherein, the receiver device
Processor for provide calculate and control ability.The memory of the receiver device includes non-volatile memory medium, memory
Reservoir.The non-volatile memory medium is stored with operating system, computer program and database.The built-in storage is non-volatile
The operation of operating system and computer program in storage medium provides environment.The database of the receiver device is for storing symbol
Number synchrodata.The network interface of the receiver device is used to communicate with external terminal by network connection.The computer journey
To realize a kind of symbol timing synchronization method when sequence is executed by processor.
It will be understood by those skilled in the art that structure shown in Fig. 8, only part relevant to application scheme is tied
The block diagram of structure does not constitute the restriction for the computer equipment being applied thereon to application scheme, specific computer equipment
It may include perhaps combining certain components or with different component layouts than more or fewer components as shown in the figure.
In one embodiment, a kind of receiver device, including memory and processor are provided, is stored in memory
Computer program, the processor perform the steps of when executing computer program
Time-domain sampling is carried out to the signal received, obtains sequence of time-domain samples；
Relevant calculation is carried out using preset local sequence and sequence of time-domain samples, obtains each in sequence of time-domain samples adopt
The cross correlation value of sampling point；
Cross correlation value based on each sampled point obtains the accumulated correlation values of each sampled point；Accumulated correlation values are sampled point
Cross correlation value be located at sampled point before default sampled point cross correlation value and；
The corresponding sampled point of maximum value in all accumulated correlation values is determined as destination sample point, and according to destination sample
Point determines sign synchronization position.
In one embodiment, sequence of time-domain samples includes cyclic prefix CP and long training sequence LTF；Local sequence with
LTF is identical.
In one embodiment, processor execute computer program when also perform the steps of according to comprisingRelational expression, calculate ith sample point cross correlation value；Wherein, r (i+m-N) indicates time-domain sampling
The sampled value of i-th+m-N sampled points in sequence；L (m) indicates m-th of value of local sequence.
In one embodiment, it is also performed the steps of when processor executes computer program determining current to be calculated tired
Add the first sampled point of correlation；Obtain the mutual of each second sampled point in the sliding window before being located at the first sampled point
Pass value；The cross correlation value of each second sampled point is added up, the accumulated correlation values of the first sampled point are obtained.
In one embodiment, processor execute computer program when also perform the steps of according to comprisingRelational expression, obtain i-th of first sampled points accumulated correlation values；Wherein L indicates sliding
The length of window, N indicate that the sequence length of LTF, r (i-l+m-N) indicate the sampled value of (i-l+m-N) a sampled point, l (m)
Indicate m-th of value of local sequence.
In one embodiment, it is also performed the steps of when processor executes computer program destination sample point is corresponding
Position be determined as sign synchronization position.
In one embodiment, it also performs the steps of when processor executes computer program according to each sampled point
Accumulated correlation values determine sync bit reference point from the sampled point in sequence of time-domain samples；Wherein, in sync bit reference point
Before, the corresponding accumulated correlation values of each sampled point are increased continuously, and after sync bit reference point, each sampled point is corresponding
Accumulated correlation values fluctuate within a preset range；Sign synchronization position is determined according to sync bit reference point and destination sample point.
In one embodiment, it also performs the steps of when processor executes computer program when S (i) > S (i-1)+Δ
And when S (i+1) < S (i)+Δ, ith sample point is determined as sync bit reference point；Wherein, S (i) indicates ith sample point
Accumulated correlation values, Δ indicates preset threshold value thresholding.
In one embodiment, sync bit will be located at by, which also performing the steps of when processor executes computer program, joins
Intermediate samples point between examination point and destination sample point, is determined as sign synchronization position.
In one embodiment, it also performs the steps of when processor executes computer program according to formula psync=
floor([p1+pmax]/2) determine sign synchronization position；Wherein, psyncFor sign synchronization position, p1Point is referred to for sync bit
It sets, pmaxFor destination sample point position；Floor () indicates evidence obtaining function upwards.
In one embodiment, tiring out when third sampled point is also performed the steps of when processor executes computer program
Add correlation, is continuously greater than third sampled point and corresponds to the corresponding accumulated correlation values of all sampled points in search range, and be greater than
When default accumulated correlation values thresholding, third sampled point is determined as destination sample point.
Computer equipment provided in this embodiment, implementing principle and technical effect are similar with above method embodiment,
This is repeated no more.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
Machine program performs the steps of when being executed by processor
Time-domain sampling is carried out to the signal received, obtains sequence of time-domain samples；
Relevant calculation is carried out using preset local sequence and sequence of time-domain samples, obtains each in sequence of time-domain samples adopt
The cross correlation value of sampling point；
Cross correlation value based on each sampled point obtains the accumulated correlation values of each sampled point；Accumulated correlation values are sampled point
Cross correlation value be located at sampled point before default sampled point cross correlation value and；
The corresponding sampled point of maximum value in all accumulated correlation values is determined as destination sample point, and according to destination sample
Point determines sign synchronization position.
In one embodiment, sequence of time-domain samples includes cyclic prefix CP and long training sequence LTF；Local sequence with
LTF is identical.
In one embodiment, also performed the steps of when computer program is executed by processor according to comprisingRelational expression, calculate ith sample point cross correlation value；Wherein, r (i+m-N) indicates that time domain is adopted
The sampled value of i-th+m-N sampled points in sample sequence；L (m) indicates m-th of value of local sequence.
In one embodiment, it is also performed the steps of when computer program is executed by processor determining current to be calculated
First sampled point of accumulated correlation values；Obtain the mutual of each second sampled point in the sliding window before being located at the first sampled point
Correlation；The cross correlation value of each second sampled point is added up, the accumulated correlation values of the first sampled point are obtained.
In one embodiment, also performed the steps of when computer program is executed by processor according to comprisingRelational expression, obtain i-th of first sampled points accumulated correlation values；Wherein L indicates sliding
The length of window, N indicate that the sequence length of LTF, r (i-l+m-N) indicate the sampled value of (i-l+m-N) a sampled point, l (m)
Indicate m-th of value of local sequence.
In one embodiment, it is also performed the steps of when computer program is executed by processor by destination sample point pair
The position answered is determined as sign synchronization position.
In one embodiment, it also performs the steps of when computer program is executed by processor according to each sampled point
Accumulated correlation values, from the sampled point in sequence of time-domain samples determine sync bit reference point；Wherein, it is referred in sync bit
Before point, the corresponding accumulated correlation values of each sampled point are increased continuously, and after sync bit reference point, each sampled point is corresponding
Accumulated correlation values fluctuate within a preset range；Sign synchronization position is determined according to sync bit reference point and destination sample point
It sets.
In one embodiment, also performed the steps of when computer program is executed by processor when S (i) > S (i-1)+
When Δ and S (i+1) < S (i)+Δ, ith sample point is determined as sync bit reference point；Wherein, S (i) indicates ith sample
The accumulated correlation values of point, Δ indicate preset threshold value thresholding.
In one embodiment, sync bit will be located at by also performing the steps of when computer program is executed by processor
Intermediate samples point between reference point and destination sample point, is determined as sign synchronization position.
In one embodiment, it also performs the steps of when computer program is executed by processor according to formula psync=
floor([p1+pmax]/2) determine sign synchronization position；Wherein, psyncFor sign synchronization position, p1Point is referred to for sync bit
It sets, pmaxFor destination sample point position；Floor () indicates evidence obtaining function upwards.
In one embodiment, it also performs the steps of when computer program is executed by processor when third sampled point
Accumulated correlation values are continuously greater than third sampled point and correspond to the corresponding accumulated correlation values of all sampled points in search range, and big
When default accumulated correlation values thresholding, third sampled point is determined as destination sample point.
Computer readable storage medium provided in this embodiment, implementing principle and technical effect and above method embodiment
Similar, details are not described herein.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (12)
1. a kind of symbol timing synchronization method, which is characterized in that the described method includes:
Time-domain sampling is carried out to the signal received, obtains sequence of time-domain samples；
Relevant calculation is carried out using preset local sequence and the sequence of time-domain samples, is obtained each in the sequence of time-domain samples
The cross correlation value of a sampled point；
Cross correlation value based on each sampled point obtains the accumulated correlation values of each sampled point；The accumulated correlation values are institute
State the cross correlation value of sampled point and the cross correlation value for the default sampled point being located at before the sampled point and；
The corresponding sampled point of maximum value in all accumulated correlation values is determined as destination sample point, and according to the destination sample
Point determines sign synchronization position.
2. the method according to claim 1, wherein described using preset local sequence and the time-domain sampling
Sequence carries out relevant calculation, obtains the cross correlation value of each sampled point in the sequence of time-domain samples, comprising:
According to comprisingRelational expression, calculate ith sample point cross correlation value；
Wherein, r (i+m-N) indicates the sampled value of the i-th+m-N sampled points in the sequence of time-domain samples；L (m) indicates described
M-th of value of ground sequence.
3. according to the method described in claim 2, it is characterized in that, the cross correlation value based on each sampled point obtains
The accumulated correlation values of each sampled point, comprising:
Determine the first sampled point of current accumulated correlation values to be calculated；
Obtain the cross correlation value of each second sampled point in the sliding window before being located at first sampled point；
The cross correlation value of each second sampled point is added up, the accumulated correlation values of first sampled point are obtained.
4. according to the method described in claim 3, it is characterized in that, the cross correlation value by each second sampled point into
Row is cumulative, obtains the accumulated correlation values of first sampled point, comprising:
According to comprisingRelational expression, obtain i-th of first sampled points accumulated correlation values；
Wherein L indicates the length of the sliding window, and N indicates that the sequence length of LTF, r (i-l+m-N) indicate (i-l+m-N)
The sampled value of a sampled point, l (m) indicate m-th of value of the local sequence.
5. method according to claim 1 or 2, which is characterized in that described to determine that symbol is same according to the destination sample point
Step is set, comprising:
The corresponding position of the destination sample point is determined as the sign synchronization position.
6. method according to claim 1 or 2, which is characterized in that described to determine that symbol is same according to the destination sample point
Step is set, comprising:
According to the accumulated correlation values of each sampled point, sync bit reference is determined from the sampled point in the sequence of time-domain samples
Point；Wherein, before the sync bit reference point, the corresponding accumulated correlation values of each sampled point are increased continuously, described same
After walking position reference point, the corresponding accumulated correlation values of each sampled point fluctuate within a preset range；
The sign synchronization position is determined according to the sync bit reference point and destination sample point.
7. according to the method described in claim 6, it is characterized in that, the accumulated correlation values according to each sampled point, from institute
It states and determines sync bit reference point in the sampled point in sequence of time-domain samples, comprising:
When S (i)>S (i-1)+Δ and S (i+1)<S (i)+Δ, ith sample point is determined as sync bit reference point；
Wherein, S (i) indicates the accumulated correlation values of ith sample point, and Δ indicates preset threshold value thresholding.
8. method according to claim 6 or 7, which is characterized in that described according to the sync bit reference point and institute
It states destination sample point and determines the sign synchronization position, comprising:
By the intermediate samples point between the sync bit reference point and destination sample point, it is same to be determined as the symbol
Step is set.
9. according to the method described in claim 8, it is characterized in that, described will be located at the sync bit reference point and the mesh
The intermediate samples point between sampled point is marked, the sign synchronization position is determined as, comprising:
According to formula psync=floor ([p1+pmax]/2) determine the sign synchronization position；
Wherein, psyncFor the sign synchronization position, p1For the sync bit reference point locations, pmaxFor the destination sample point
Position；Floor () indicates evidence obtaining function upwards.
10. the method according to claim 1, wherein the maximum value by each accumulated correlation values
Corresponding sampled point is determined as destination sample point, comprising:
When the accumulated correlation values of third sampled point, continuously it is greater than the third sampled point and corresponds to all sampled points in search range
Corresponding accumulated correlation values, and when being greater than default accumulated correlation values thresholding, the third sampled point is determined as the target and is adopted
Sampling point.
11. a kind of sign synchronization device, which is characterized in that described device includes:
Sampling module obtains sequence of time-domain samples for carrying out time-domain sampling to the signal received；
Computing module, for carrying out relevant calculation using preset local sequence and the sequence of time-domain samples, when obtaining described
The cross correlation value of each sampled point in the sample sequence of domain；
Accumulator module obtains the accumulated correlation values of each sampled point for the cross correlation value based on each sampled point；It is described
Accumulated correlation values are the cross correlation value and the cross correlation value of the default sampled point before the sampled point of the sampled point
With；
Determining module, for the corresponding sampled point of maximum value in all accumulated correlation values to be determined as destination sample point, and root
Sign synchronization position is determined according to the destination sample point.
12. a kind of receiver device, including memory and processor, the memory are stored with computer program, feature exists
In the step of processor realizes any one of claims 1 to 10 the method when executing the computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504362.7A CN110224964B (en) | 2019-06-12 | 2019-06-12 | Symbol synchronization method, apparatus, receiver device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504362.7A CN110224964B (en) | 2019-06-12 | 2019-06-12 | Symbol synchronization method, apparatus, receiver device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110224964A true CN110224964A (en) | 2019-09-10 |
| CN110224964B CN110224964B (en) | 2021-10-15 |
Family
ID=67816506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910504362.7A Active CN110224964B (en) | 2019-06-12 | 2019-06-12 | Symbol synchronization method, apparatus, receiver device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110224964B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111615187A (en) * | 2020-05-20 | 2020-09-01 | 普联技术有限公司 | Wireless signal synchronization method |
| CN112398566A (en) * | 2020-11-16 | 2021-02-23 | 中国电子科技集团公司第二十九研究所 | High-precision arrival time calculation method and device for burst communication system |
| CN112615803A (en) * | 2020-12-29 | 2021-04-06 | 深圳捷扬微电子有限公司 | Signal processing method and processing device |
| CN113794667A (en) * | 2021-09-15 | 2021-12-14 | 航天新通科技有限公司 | PSS (Power System stabilizer) rapid search method and device and storage medium |
| CN114679360A (en) * | 2022-02-18 | 2022-06-28 | 瑞玛思特(深圳)科技有限公司 | Method for realizing OFDM symbol synchronization by using cyclic prefix |
| CN114726699A (en) * | 2022-04-19 | 2022-07-08 | Oppo广东移动通信有限公司 | Signal windowing position processing method, storage medium, electronic device and terminal |
| CN116614215A (en) * | 2023-04-25 | 2023-08-18 | 北京大有半导体有限责任公司 | Data synchronization method, device, signal receiving terminal and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291351A (en) * | 2011-08-08 | 2011-12-21 | 电子科技大学 | Timing synchronization method of receiver in OFDM wireless communication system |
| CN102469057A (en) * | 2010-11-11 | 2012-05-23 | 上海明波通信技术有限公司 | Frame synchronization method and device applicable to burst communication system |
| US20130136198A1 (en) * | 2011-11-28 | 2013-05-30 | Uurmi Systems Pvt. Ltd | System and method for adaptive time synchronization |
| CN103297376A (en) * | 2013-06-05 | 2013-09-11 | 北京邮电大学 | Symbol synchronization method of OFDM (orthogonal frequency division multiplexing) system |
| US20140036984A1 (en) * | 2012-07-31 | 2014-02-06 | Exelis Inc. | Equalization of a Distributed Pilot OFDM Signal |
| CN108736931A (en) * | 2017-04-14 | 2018-11-02 | 深圳市中兴微电子技术有限公司 | A kind of signal synchronizing method and device |
-
2019
- 2019-06-12 CN CN201910504362.7A patent/CN110224964B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469057A (en) * | 2010-11-11 | 2012-05-23 | 上海明波通信技术有限公司 | Frame synchronization method and device applicable to burst communication system |
| CN102291351A (en) * | 2011-08-08 | 2011-12-21 | 电子科技大学 | Timing synchronization method of receiver in OFDM wireless communication system |
| US20130136198A1 (en) * | 2011-11-28 | 2013-05-30 | Uurmi Systems Pvt. Ltd | System and method for adaptive time synchronization |
| US20140036984A1 (en) * | 2012-07-31 | 2014-02-06 | Exelis Inc. | Equalization of a Distributed Pilot OFDM Signal |
| CN103297376A (en) * | 2013-06-05 | 2013-09-11 | 北京邮电大学 | Symbol synchronization method of OFDM (orthogonal frequency division multiplexing) system |
| CN108736931A (en) * | 2017-04-14 | 2018-11-02 | 深圳市中兴微电子技术有限公司 | A kind of signal synchronizing method and device |
Non-Patent Citations (3)
| Title |
|---|
| EN ZHOU ET AL: ""A Novel Timing Synchronization Method for Localized OFDMA Uplink System"", 《2006 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS》 * |
| LENOVO: "" D2D Synchronization Signal and Channel Design"", 《3GPP TSG RAN WG1 MEETING #78BIS R1-143944》 * |
| 敖珺等: ""基于PPM同步序列的大气激光通信***"", 《光通信技术》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111615187A (en) * | 2020-05-20 | 2020-09-01 | 普联技术有限公司 | Wireless signal synchronization method |
| CN112398566A (en) * | 2020-11-16 | 2021-02-23 | 中国电子科技集团公司第二十九研究所 | High-precision arrival time calculation method and device for burst communication system |
| CN112398566B (en) * | 2020-11-16 | 2022-05-24 | 中国电子科技集团公司第二十九研究所 | High-precision arrival time calculation method and device for burst communication system |
| CN112615803A (en) * | 2020-12-29 | 2021-04-06 | 深圳捷扬微电子有限公司 | Signal processing method and processing device |
| CN112615803B (en) * | 2020-12-29 | 2022-12-16 | 深圳捷扬微电子有限公司 | Signal processing method and processing device |
| CN113794667A (en) * | 2021-09-15 | 2021-12-14 | 航天新通科技有限公司 | PSS (Power System stabilizer) rapid search method and device and storage medium |
| CN114679360A (en) * | 2022-02-18 | 2022-06-28 | 瑞玛思特(深圳)科技有限公司 | Method for realizing OFDM symbol synchronization by using cyclic prefix |
| CN114726699A (en) * | 2022-04-19 | 2022-07-08 | Oppo广东移动通信有限公司 | Signal windowing position processing method, storage medium, electronic device and terminal |
| CN114726699B (en) * | 2022-04-19 | 2024-02-23 | Oppo广东移动通信有限公司 | Signal windowing position processing method, storage medium, electronic device and terminal |
| CN116614215A (en) * | 2023-04-25 | 2023-08-18 | 北京大有半导体有限责任公司 | Data synchronization method, device, signal receiving terminal and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110224964B (en) | 2021-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110224964A (en) | Symbol timing synchronization method, device, receiver device and storage medium | |
| US8391131B2 (en) | Method for processing the random access transmission in the frequency domain | |
| EP1662738B1 (en) | Apparatus and method for estimating start of frame | |
| US7616679B2 (en) | Method and apparatus for searching cells utilizing down link preamble signal | |
| CN101945073B (en) | Pilot frequency-based time offset estimation device and method | |
| EP2437450A1 (en) | Device and method for estimating time offset in orthogonal frequency division multiplexing (ofdm) system | |
| KR100594597B1 (en) | Method and apparatus for embodying downlink signal in mobile communication system, and method and apparatus for synchronizing and searching cell using the same | |
| CN107241794B (en) | Rapid synchronous tracking method and device for TDD-OFDM downlink | |
| EP1582006B1 (en) | Method and device to maintain synchronization tracking in tdd wireless communication | |
| CN102571668B (en) | Phase compensation method and system in LTE (long term evolution) system | |
| EP2120336B1 (en) | Technique for controlling a gain of a receiver | |
| CN104717174B (en) | A kind of OFDM anti-interference synchronous methods under complexity multipath channel | |
| KR20070039155A (en) | Method and apparatus for fast cell search | |
| US20110090995A1 (en) | Simultaneous cell group and cyclic prefix detection method, apparatus and system | |
| KR100668669B1 (en) | Apparatus for acquiring frame timing for ofdma mobile communication system | |
| CN110351825B (en) | NPRACH signal detection method, device, NPRACH receiver and storage medium | |
| KR100754840B1 (en) | Method for Frequency Synchronization of Mobile Telecommunication System Using OFDM | |
| CN100559785C (en) | A kind of receiving symbolic synchronous method that is used for the WiMAX system | |
| KR20100056800A (en) | Mimo telecommunication apparatus | |
| KR100884379B1 (en) | Apparearus and method for transmitting downlink frame in wireless communication system | |
| CN101217525B (en) | A downlink frame synchronization method and device in orthogonal frequency division multiplexing system | |
| KR20070090518A (en) | Apparatus and method frame synchronization in a broadband wireless access communication system | |
| CN102447506A (en) | Method and device for enhancing downlink synchronization reliability | |
| CN114584449B (en) | Improved M-part timing synchronization and frequency offset method based on CAZAC sequence | |
| CN114726699B (en) | Signal windowing position processing method, storage medium, electronic device and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 519000 No. 333, Kexing Road, Xiangzhou District, Zhuhai City, Guangdong Province Applicant after: ZHUHAI JIELI TECHNOLOGY Co.,Ltd. Address before: Floor 1-107, building 904, ShiJiHua Road, Zhuhai City, Guangdong Province Applicant before: ZHUHAI JIELI TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |