CN107820273A - The method and device of sidelink synchronizing signal in a kind of detection D2D - Google Patents
The method and device of sidelink synchronizing signal in a kind of detection D2D Download PDFInfo
- Publication number
- CN107820273A CN107820273A CN201610824964.7A CN201610824964A CN107820273A CN 107820273 A CN107820273 A CN 107820273A CN 201610824964 A CN201610824964 A CN 201610824964A CN 107820273 A CN107820273 A CN 107820273A
- Authority
- CN
- China
- Prior art keywords
- ssss
- symbols
- psss
- information
- accurate
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
Abstract
The invention discloses a kind of method of auxiliary sidelink synchronizing signals in detection D2D, methods described includes：Obtain main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals SSSS symbols；The adjustment information for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols, is adjusted to obtain accurate SSSS symbols according to the adjustment information to the SSSS symbols；The sidelink that SSSS is obtained by the detection to the accurate SSSS symbols identifies SL ID.The embodiment of the invention also discloses a kind of device of auxiliary sidelink synchronizing signals in detection D2D.
Description
Technical field
The present invention relates to the method and dress of sidelink synchronizing signal in the communications field, more particularly to a kind of detection D2D
Put.
Background technology
With developing rapidly for mobile communication, the communication mode of the conventional cellular network system centered on base station is present
Limitation, the communication pattern of device-to-device (Device-to-Device, D2D) are increasingly subject to extensive concern.So-called D2D, refers to
Business datum without base station forwarding, it is this but directly by source user equipment by air interface transmission to target UE
Communication pattern is different from conventional cellular systems communication pattern.D2D technologies have that link range is short, and channel quality is high, can meet
The information sharing business closed between user, there is provided high-speed, low time delay, the transmission service of low-power consumption.Draw in cellular networks
Enter D2D heterogeneous networks, network structure can be made flexibly to expand, overlay network blind area, while can also be by being multiplexed cellular network
Resource improves cell edge communication quality, improves Consumer's Experience and power system capacity.
In D2D communications, the premise that source user equipment and target UE carry out data transmission is to first have to realize transmitting-receiving
The Time and Frequency Synchronization at both ends.Unlike past LTE terminal, D2D terminals can periodically be sent in part covering or without coverage condition
Synchronizing signal indicates the reference synchronization as other D2D UE as reference synchronization source, or by network.Receive D2D synchronizing signals
Synchronously will more have challenge compared to LTE.It is synchronous for the new secondary link Sidelink of D2D Synchronization Designs in 3GPP standard agreements
Signal.Sidelink synchronizing signals are by main Sidelink synchronizing signals (primary sidelink synchronization
Signal, PSSS) and auxiliary Sidelink synchronizing signals (subsidiary sidelink synchronization signal,
SSSS) form, it is specific as shown in Figure 1.Sidelink synchronizing signals two adjacent single-carrier frequency division multiple access in identical subframe
Sent on (Single-carrier Frequency-Division Multiple Access, SC-FDMA) symbol.
SSSS signal detections identify SL-ID detection as one of important step in synchronization, predominantly Sidelink.Due to
SSSS designs do not use LTE identical design methods, and SSSS symbols and PSSS symbols are relatively far apart, it is impossible to utilize PSSS symbols
Channel estimation carry out relevant detection and obtain preferable performance；And non-coherent detection methods can only be used.And the incoherent inspections of SSSS
Survey to timing, the sensitivity such as frequency deviation and coherence bandwidth, directly then performance will be greatly affected for detection.Further, in order to reduce peak
There is back-off with respect to PSSS symbols than PAPR, SSSS symbols, SSSS detections will be more exposed to challenge.Therefore, one kind is needed badly
The technical scheme of sidelink synchronizing signal in D2D is detected, realizes the detection to the SSSS in D2D.
The content of the invention
In view of this, the embodiment of the present invention desirable to provide auxiliary sidelink synchronizing signals in a kind of detection D2D method and
Device, the accurate detection to the SSSS in D2D can be realized.
What the technical scheme of the embodiment of the present invention was realized in：
On the one hand, the method that the embodiment of the present invention provides auxiliary sidelink synchronizing signals in a kind of detection D2D, methods described
Including：
Obtain main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals SSSS symbols；By to described
PSSS symbols carry out the adjustment information that channel impulse response estimation obtains the SSSS, according to the adjustment information to the SSSS
Symbol is adjusted to obtain accurate SSSS symbols；The sidelink that SSSS is obtained by the detection to the accurate SSSS symbols is marked
Know SL-ID.
In such scheme, the tune for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Whole information, the SSSS symbols, which are adjusted to obtain accurate SSSS symbols, according to the adjustment information includes：
The smart timing offset information for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols, root
Adjustment is timed to the SSSS symbols according to the smart timing offset information and obtains the accurate SSSS symbols.
In such scheme, the tune for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Whole information, the SSSS symbols, which are adjusted to obtain accurate SSSS symbols, according to the adjustment information includes：
By the PSSS symbols are carried out channel impulse response estimation obtain the SSSS smart timing offset information and
Integer frequency offset information；Adjustment is timed to the SSSS symbols according to the smart timing offset information, and according to described whole
Several times frequency deviation information carries out frequency deviation compensation to the SSSS symbols, obtains the accurate SSSS symbols.
In such scheme, methods described also includes：
Obtain fraction frequency deviation information；Frequency deviation compensation is carried out to the SSSS symbols according to the fraction frequency deviation information.
In such scheme, methods described also includes：
The Sequence Detection value for obtaining the PSSS by carrying out channel impulse response estimation to the PSSS symbols；Determine institute
State and gather corresponding to PSSS Sequence Detection value, the SI-ID is determined in the set according to SSSS group numbers.
In such scheme, the essence for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Timing offset value includes：Fourier transformation, inverse with the relevant treatment of PSSS sequences, Fourier is carried out to the PSSS symbols successively
The smart timing offset value of the SSSS is obtained after conversion, energy balane, accumulation calculating and peak value searching.
In such scheme, the sidelink that the detection by the accurate SSSS symbols obtains SSSS identifies SL-
ID includes：The accurate SSSS symbols are carried out successively Fourier transformation, with the relevant treatment of SSSS sequences, energy normalized
The SL-ID of the SSSS is obtained after reason, accumulation calculating and peak value searching.
On the other hand, the embodiment of the present invention also provides a kind of device of auxiliary sidelink synchronizing signals in detection D2D, described
Device includes：Acquisition module, adjusting module, determining module；Wherein,
The acquisition module, for obtaining main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals
SSSS symbols；The adjusting module, for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Adjustment information, the SSSS symbols are adjusted according to the adjustment information to obtain accurate SSSS symbols；The determination mould
Block, the sidelink for obtaining SSSS by the detection to the accurate SSSS symbols identify SL-ID.
In such scheme, the adjusting module is specifically used for：Estimated by carrying out channel impulse response to the PSSS symbols
Meter obtains the smart timing offset information of the SSSS, and tune is timed to the SSSS symbols according to the smart timing offset information
It is whole to obtain the accurate SSSS symbols.
In such scheme, the adjusting module is specifically used for：Estimated by carrying out channel impulse response to the PSSS symbols
Meter obtains the smart timing offset information and integer frequency offset information of the SSSS；According to the smart timing offset information to described
SSSS symbols are timed adjustment, and carry out frequency deviation compensation to the SSSS symbols according to the integer frequency offset information, obtain
The accurate SSSS symbols.
In such scheme, described device also includes：Fraction frequency deviation module, is used for：
Obtain fraction frequency deviation information；Frequency deviation compensation is carried out to the SSSS symbols according to the fraction frequency deviation information.
In such scheme, the adjusting module is additionally operable to：
The Sequence Detection value for obtaining the PSSS by carrying out channel impulse response estimation to the PSSS symbols；Determine institute
State and gather corresponding to PSSS Sequence Detection value, the SI-ID is determined in the set according to SSSS group numbers.
In such scheme, the adjusting module to the PSSS symbols by carrying out described in channel impulse response estimation acquisition
SSSS smart timing offset value includes：The PSSS symbols are carried out successively Fourier transformation, with the relevant treatments of PSSS sequences,
The smart timing offset value of the SSSS is obtained after inverse Fourier transform, energy balane, accumulation calculating and peak value searching.
In such scheme, the determining module is specifically used for：
Fourier transformation, relevant treatment, energy normalized with SSSS sequences are carried out to the accurate SSSS symbols successively
The SL-ID of the SSSS is obtained after processing, accumulation calculating and peak value searching.
The method and apparatus of auxiliary sidelink synchronizing signals in a kind of detection D2D of the embodiment of the present invention：Obtain master
Sidelink synchronizing signal PSSS symbols and auxiliary sidelink synchronizing signals SSSS symbols；By carrying out letter to the PSSS symbols
Channel shock response estimation obtains the adjustment information of the SSSS, and the SSSS symbols are adjusted according to the adjustment information
To accurate SSSS symbols；The sidelink that SSSS is obtained by the detection to the accurate SSSS symbols identifies SL-ID.In this way,
PSSS symbols are handled by channel impulse response estimation, the SSSS of acquisition adjustment information, believed by the adjustment of acquisition
After breath is adjusted to SSSS symbols, SL-ID is determined so as to detect, SSSS detection performances can be effectively improved.
Brief description of the drawings
Fig. 1 is Sidelink synchronizing signal structural representations；
Fig. 2 is the flow signal of the method for auxiliary sidelink synchronizing signals in the detection D2D that the embodiment of the present invention one provides
Figure；
Fig. 3 is the schematic flow sheet of the method for the determination SI-ID that the embodiment of the present invention two provides；
Fig. 4 is the flow signal of the method for auxiliary sidelink synchronizing signals in the detection D2D that the embodiment of the present invention three provides
Figure；
Fig. 5 is the flow signal of the method for auxiliary sidelink synchronizing signals in the detection D2D that the embodiment of the present invention four provides
Figure；
Fig. 6 is the structure of the device of auxiliary sidelink synchronizing signals in a kind of detection D2D that the embodiment of the present invention five provides
Schematic diagram；
Fig. 7 is the knot of the device of auxiliary sidelink synchronizing signals in another detection D2D that the embodiment of the present invention five provides
Structure schematic diagram.
Embodiment
The implementation to technical scheme is described in further detail below in conjunction with the accompanying drawings.
Embodiment one
The embodiment of the present invention one provides a kind of method of auxiliary sidelink synchronizing signals in detection D2D as shown in Fig. 2 described
Method includes：
S201, obtain main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals SSSS symbols；
When source user equipment and target UE carry out D2D communications, the Time and Frequency Synchronization of transmitting-receiving two-end is carried out first, when
After one end receives D2D synchronizing signals, D2D synchronizing signals are carried out as detection terminal to carry in parsing acquisition D2D synchronizing signals
PSSS symbols and SSSS symbols；Wherein, PSSS symbols are PSSS time-domain symbols, and SSSS symbols are SSSS time-domain symbols.
Here, the detection terminal of the D2D synchronizing signals received is likely located at outside coverage, it is also possible to is positioned over model
In enclosing；Wherein, coverage be base station (such as：ENodeB) the coverage of cellular network, and the D2D synchronizing signals received
Detection terminal can be located at base station cellular network coverage in, it is also possible to outside the coverage of base station cellular network.
Here, sidelink ID includes 336, is represented by 0-335, and wherein 336 SIL-ID are divided to for two
Set, first set identification is 0-167, is represented with id_net, second set identification 168-335, is represented with id_oon.
PSSS Sequence Detection value includes two different values, indicates respectively that sidelink synchronizing signals are located at different collection
In conjunction, specifically, when PSSS is 0, it indicates that SL-ID positioned at first set, determine by the transmission for characterizing the terminal for sending signal
When be referenced as base station；When PSSS is 1, it indicates that SL-ID characterizes the transmission for the terminal for sending signal in second set
Timing reference is not base station.
S202, the adjustment information for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols, root
The SSSS symbols are adjusted according to the adjustment information to obtain accurate SSSS symbols；
Specifically, the adjustment that the SSSS is obtained by carrying out channel impulse response estimation to the PSSS symbols is believed
Breath, the SSSS symbols, which are adjusted to obtain accurate SSSS symbols, according to the adjustment information includes following several situations：
(1) the smart timing offset that the SSSS is obtained by carrying out channel impulse response estimation to the PSSS symbols is believed
Breath, adjustment is timed to the SSSS symbols according to the smart timing offset information and obtains the accurate SSSS symbols.
(2) the smart timing offset information for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
With integer frequency offset information；Adjustment is timed to the SSSS symbols according to the smart timing offset information, and according to described
Integer frequency offset information carries out frequency deviation compensation to the SSSS symbols, obtains the accurate SSSS symbols.
After PSSS symbols are obtained, channel impulse response estimation is carried out to PSSS symbols, obtains SSSS adjustment information, its
In, adjustment information comprises at least SSSS essence timing offset informations, may also include integer frequency offset information, PSSS Sequence Detection values etc.
SSSS adjustment information.Here, when carrying out channel impulse response estimation to PSSS symbols, the PSSS of channel impulse response estimation is carried out
Symbol can be to carry out the PSSS after thick timing and the adjustment of fraction frequency deviation.
Here, the adjustment information for SSSS being obtained by carrying out channel impulse response estimation to PSSS symbols can be according to detection eventually
The residing network environment in end is different and different, specifically, when detection terminal is the terminal in coverage, the adjustment letter of acquisition
Cease for SSSS essence timing offset informations, when detection terminal is the terminal outside coverage, the adjustment information of acquisition is except SSSS essences
Beyond true timing offset information, integer frequency offset information is may also include, further, may also include PSSS Sequence Detection values.
It is different according to obtained adjustment information during being adjusted to obtain accurate SSSS symbols to SSSS, to obtaining
The SSSS symbols taken adjust corresponding to carrying out.
The SSSS obtained after channel impulse response estimation is carried out to PSSS symbols adjustment information is believed for smart timing offset
During breath, adjustment is timed to SSSS symbols using the smart timing offset information of acquisition；Wherein, it is being timed adjustment here
When, the SSSS symbols adjusted can be to utilize the SSSS symbols acquired in thick timing.
The SSSS obtained after channel impulse response estimation is carried out to PSSS symbols adjustment information includes integer frequency offset
During information, frequency deviation compensation is carried out to the SSSS symbols using the integer frequency offset information of acquisition, obtains the accurate SSSS symbols
Number.
Here, it is described to obtain the smart regularly inclined of the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Difference includes：The PSSS symbols are carried out successively Fourier transformation, with the relevant treatments of PSSS sequences, inverse Fourier transform,
The smart timing offset value of the SSSS is obtained after energy balane, accumulation calculating and peak value searching.Wherein, PSSS sequences are ZC
(Zadoff-Chu) the PSSS sequences of code root instruction.
When carrying out frequency deviation compensation to SSSS symbols, in addition to：Obtain fraction frequency deviation information；Believed one side only according to the Fractional Frequency
Breath carries out frequency deviation compensation to the SSSS symbols.Here, the frequency deviation compensation carried out to SSSS includes the frequency of integer frequency offset information
The frequency deviation of offset compensation and fraction frequency deviation information compensates.
S203, SSSS sidelink marks SL-ID is obtained by the detection to the accurate SSSS symbols.
When obtaining accurate SSSS symbols, the SL-ID of the SSSS is detected, it is here, described by being accorded with to the accurate SSSS
Number detection obtain SSSS sidelink mark SL-ID include：The accurate SSSS symbols are carried out successively Fourier transformation,
The SL- of the SSSS is obtained after relevant treatment, energy normalized processing, accumulation calculating and peak value searching with SSSS sequences
ID。
Methods described also includes：The sequence for obtaining the PSSS by carrying out channel impulse response estimation to the PSSS symbols
Row detected value；Determine to gather corresponding to the Sequence Detection value of the PSSS, determined according to SSSS group numbers in the set described in
SI-ID.Wherein, SSSS group numbers is successively to the accurate SSSS symbols progress Fourier transformation, places related to SSSS sequences
The numerical value obtained after reason, energy normalized processing, accumulation calculating and peak value searching.
Here, the Sequence Detection value of the PSSS can characterize the SSSS that current detection terminal receives SL-ID and belong to
One set or second set, when PSSS Sequence Detections value instruction SL-ID is located at first set, then the SSSS in first set
Position corresponding to group number is the current SL-ID for detecting to obtain；When PSSS Sequence Detections value instruction SL-ID is located at second set
When, then position corresponding to the SSSS group numbers in second set is the current SL-ID for detecting to obtain.
Wherein, when the Sequence Detection value for obtaining the PSSS by carrying out channel impulse response estimation to the PSSS symbols
Afterwards, can when carrying out the relevant treatment with SSSS sequences to SSSS symbols during determining SL-ID according to accurate SSSS symbols
SSSS sequences are determined using the Sequence Detection value of the PSSS by carrying out channel impulse response estimation acquisition to PSSS symbols.Need
Illustrate, here, when it is determined that carrying out the SSSS sequences of relevant treatment, can be used by carrying out channel to the PSSS symbols
The Sequence Detection value for the PSSS that impulse response estimation obtains, it is possible to use the PSSS determined by other method Sequence Detection
Value, in embodiments of the present invention and is not limited.
Here, when in the range of detection terminal is positioned over, the SSSS group numbers obtained after peak value searching are SL-ID.When
When detection terminal is positioned over outside scope, determined according to the Sequence Detection value of the SSSS group numbers and PSSS obtained after peak value searching
SL-ID。
In actual use, when detection terminal is located at network coverage adjacent edges, both it is likely to be received from direct
Or the transmission terminal signaling referred to indirectly using base station as transmission timing, it is also possible to receive with base station not make outside coverage
For the transmission terminal signaling of transmission timing reference.Detection terminal can select synchronisation source according to priority as defined in agreement, such as
Directly or indirectly it is higher than using base station as the transmission terminal PRI that transmission timing refers to and is referred to not using base station as transmission timing
Transmission terminal.
Embodiment two
In embodiments of the present invention, the method for the SL-ID during SSSS in detection D2D is illustrated, such as Fig. 3 institutes
Show, methods described includes：
S301, the PSSS symbols progress channel impulse response estimation by obtaining, obtain the smart timing offset letter of SSSS symbols
Breath；
SL-ID is tried to achieve in S302, the SSSS symbols progress coherent detection by being timed adjustment to SSSS symbols.
Here, for detection terminal, no matter detection terminal belongs in coverage or outside coverage, by right
PSSS carries out channel impulse response estimation and obtains SSSS smart timing offset information, fixed by essence after obtaining smart timing offset information
When deviation information smart timing adjustment, the SSSS symbols after being adjusted, by being carried out to SSSS are carried out to the SSSS symbols of acquisition
Coherent detection, you can determine the SL-ID.
Here, when detection terminal is in outside coverage, obtained by carrying out channel impulse response estimation to PSSS
While SSSS smart timing offset information, PSSS Sequence Detections value and integer frequency offset information are also obtained；By smart timing offset
Information, PSSS Sequence Detections value and integer frequency offset information are adjusted as adjustment information to SSSS symbols, are obtained accurate
SSSS symbols and SSSS sequences, so as to by the coherent detections of SSSS symbols, obtain accurate SL-ID, enable to detect
Terminal is completed to send the identification of the timing reference terminal of signal, carries out data syn-chronization.
Embodiment three
In embodiments of the present invention, it is positioned over implementing the present invention for specific application scenarios outside scope with detection terminal
SSSS method is further described in the detection D2D that example provides, in this case processing step such as Fig. 4 institutes of SSSS detections
Show, specifically include：
S401, the PSSS symbols progress channel impulse response estimation by acquisition, obtain essence timing, the PSSS of SSSS symbols
Sequence Detection value and integer frequency offset information.Specifically include：
(1) PSSS symbols are obtained；
Here, before carrying out channel impulse response estimation to PSSS symbols, PSSS symbols are first obtained.The PSSS symbols of acquisition
For the PSSS signals compensated by thick timing adjustment and fraction shifts, thick timing and fraction frequency deviation information can be carried by preposition module
For the preposition module can carry out PSSS auto-correlation processings, but be not limited to this.
Here, the PSSS symbols y of acquisitionPSSS,i(n), i=0,1；N=0,1 ..., N-1 represent that i is that PSSS symbols refer to
Show, N=128.
(2) 1/2 sub-carrier frequencies frequency displacement is removed；
It is sub-carrier frequencies interval to remove half sub-carrier frequencies frequency displacement Δ f/2, Δ f to PSSS signals：
y′PSSS,i(n)=yPSSS,i(n)·e-jπn/NI=0,1；N=0,1 ..., N-1.
(3)FFT；
Time-domain signal is transformed into frequency domain, obtained
(4) with the relevant treatments of PSSS sequences；
After conversion by time domain to frequency domain, false subcarrier is removed, obtains YPSSS,i(k), k is subcarrier index.If Xu
Represent ZC (Zadoff-Chu) codes root instruction PSSS sequences, u=26,37, to YPSSS,i(k) circulation that cyclic shift is s is carried out
Conjugate multiplication processing：
Wherein ()NThe cyclic shift using the cycle as N is represented, b expressions frequency deviation to be estimated is relative to subcarrier spacing
Maximum integer is worth again.
(5)IFFT；
Carry out with after the processing of the conjugate multiplications of PSSS sequences, by IFFT by Cu,sTime domain is transformed into, then obtains channel impulse
Response,
(6) energy balane；
Channel impulse response concentrates on the h tried to achieveu,s(n) in shorter section, channel impulse response region [- L is obtained2,L1]
Value, asks for energy and obtains | hu,s(n)|2。
(7) accumulation calculating；
To the value of energy balane, carry out between intersymbol, antenna and added up during Sidelink synchronizing signals transmission week, obtainedI, p, q represent that symbol instruction, antenna instruction and accumulation period instruction, P, Q represent antenna respectively respectively
Number and accumulation period number.
(8) peak value searching；
To under 2 kinds of PSSS sequences 2b+1 kind integer frequency offset numerical value accumulated summed area energy value carry out peak value searching, then by
[- L where search peak2,L1] interior position tries to achieve smart timing offset value Δ τ, the PSSS sequences that search peak correspondingly uses obtain
Integer frequency offset numerical value where PSSS Sequence Detection value u and search peak are corresponding obtains integer frequency offset numerical value s
In formula, i, p, q represent respectively symbol instruction, antenna instruction and accumulation period instruction, P, Q represent respectively antenna number and
Accumulation period number.
PSSS and SSSS sampling point distances are corresponded to by smart timing offset value Δ τ and D2D the CP patterns used, SSSS symbols can be obtained
Number smart timing position.The integer frequency offset of detection is s Δs f.
S402, by timing adjustment and frequency deviation compensation after SSSS symbols carry out coherent detection try to achieve SL-ID.
(1) SSSS symbols are obtained；
The SSSS symbols are that the smart timing offset information for the SSSS that foundation detects is adjusted, and simultaneously using detection
To frequency deviation information carried out frequency deviation compensation, here, the frequency deviation compensation comprising integer frequency offset information integer frequency bias compensate with
And the Fractional Frequency offset compensation of the fraction frequency deviation of the initial estimation of preposition module offer.
It is assumed that the SSSS symbols y obtainedSSSS,i(n), i=0,1；N=0,1 ..., N-1 represent that i is that SSSS symbols refer to
Show, N=128.
(2) 1/2 sub-carrier frequencies frequency displacement is removed；
It is sub-carrier frequencies interval to remove half sub-carrier frequencies frequency displacement Δ f/2, Δ f to SSSS signals
y′SSSS,i(n)=ySSSS,i(n)·e-jπn/NI=0,1；N=0,1 ..., N-1.
(3)FFT；
Time-domain signal is transformed into frequency domain, obtained
(4) with the relevant treatments of SSSS sequences；
After conversion by time domain to frequency domain, false subcarrier is removed, obtains YSSSS,i(k), k is subcarrier index.SSSS
Coherent detection can be noncoherent detection or Differential Detection, but be not limited to this.Below using non-coherent detection methods as
Example, if XvV group SSSS codes are represented, wherein v=0,1 ..., 167, phase are segmented to obtained frequency domain SSSS and SSSS local code
Close, described segmentation is related, i.e., SSSS local codes is divided into M sections, every section carries out relevant treatment respectively.
(5) energy normalized is handled；
Correlation energy value carries out frequency domain SSSS symbol energy normalizeds, is avoided that because SSSS symbol powers retract
Influence to SSSS detection performances.
(6) accumulation calculating；
Complete between intersymbol, antenna and added up during Sidelink synchronizing signals transmission week：
In formula, m represents relevant segments instruction, and M represents segmentation number, and B represents the length of section；I, p, q represent symbol respectively
Instruction, antenna instruction and accumulation period instruction, P, Q represent antenna number and accumulation period number respectively.
(7) peak value searching
Peak value searching is carried out to the result after accumulation calculating and obtains SSSS group numbers,
And then can obtain SL-ID, i.e.,
D2D terminals outside coverage, due to not obtaining basic synchronization with network, initial frequency deviation can reach ±
10PPM, 20PPM may be reached relative to the terminal for sending D2D signals.In the case where removing fraction frequency deviation basis, may possibly still be present
Integer frequency offset, cause SSSS detection failures.In addition, SSSS noncoherent detections are to very sensitive, the very small amount timing sampling point of timing
Deviation will cause performance drastically to deteriorate, it is difficult to meet system requirements.And SSSS provided in an embodiment of the present invention detection method, profit
Channel impulse response estimation is carried out with PSSS symbols, has accurately obtained timing offset and integer frequency offset, and then SSSS is accorded with
Number it is adjusted and compensates, so as to improves SSSS detection success rate.
Example IV
In embodiments of the present invention, with detection terminal be positioned in the range of to be specific application scenarios implement to the present invention
SSSS method is further described in the detection D2D that example provides.Here, the D2D terminals in coverage, with network
Frequency Synchronization is obtained, it is smaller to receive influence to D2D.In this case the processing step of SSSS detections is as shown in figure 5, specific bag
Include：
S501, the PSSS symbols progress channel impulse response estimation by acquisition, obtain the essence timing of SSSS symbols.Process
It is as follows：
(1) PSSS symbols are obtained；
Terminal outside with coverage, the PSSS symbols are provided according to preposition module and slightly regularly obtained.Described preposition mould
Block can be PSSS cross correlation process, but be not limited to this.
Here, the PSSS symbols y of acquisitionPSSS,i(n), i=0,1；N=0,1 ..., N-1 represent that i is that PSSS symbols refer to
Show, N=128.Because Frequency Synchronization has obtained substantially, the symbol of time domain can carry out cumulative mean processing
(2) 1/2 sub-carrier frequencies frequency displacement is removed；
It is sub-carrier frequencies interval to remove half sub-carrier frequencies frequency displacement Δ f/2, Δ f
y′PSSS(n)=yPSSS(n)·e-jπn/NN=0,1 ..., N-1
(3)FFT；
Time-domain signal is transformed into frequency domain, obtained
(4) with the relevant treatments of PSSS sequences；
After conversion by time domain to frequency domain, false subcarrier is removed, obtains YPSSS(k), k is subcarrier index.If
The local PSSS codes for the ZC codes root instruction that preposition module PSSS Sequence Detections arrive are represented, to YPSSS(k) carry out at conjugate multiplication
Reason
(5)IFFT；
, will by IFFT after carrying out the relevant treatment with PSSS sequencesTime domain is transformed into, then obtains channel impulse sound
Should,
(6) energy balane；
Channel impulse response concentrates on what is tried to achieveIn shorter section, channel impulse response region [- L is obtained2,L1]
Value, asks for energy and obtains
(7) accumulation calculating；
Added up between antenna with during Sidelink synchronizing signals transmission week, obtain
(8) peak value searching；
Peak value searching is carried out, then tries to achieve smart timing offset value Δ τ
In formula, p, q represent antenna instruction and accumulation period instruction respectively, and P, Q represent antenna number and accumulation period number respectively.
PSSS and SSSS sampling point distances are corresponded to by smart timing offset value Δ τ and D2D the CP patterns used, the essence that can obtain SSSS symbols is determined
When position.
S502, by after timing adjustment SSSS symbols carry out coherent detection try to achieve SL-ID.
(1) SSSS symbols are obtained；
SSSS symbols foundation detects that smart timing offset information obtains after carrying out smart timing adjustment.
It is assumed that the time domain SSSS symbols y obtainedSSSS,i(n), i=0,1；N=0,1 ..., N-1 represent that i accords with for SSSS
Number instruction, N=128.The symbol of time domain can carry out cumulative mean processing
(2) 1/2 sub-carrier frequencies frequency displacement is removed；
It is sub-carrier frequencies interval to remove half sub-carrier frequencies frequency displacement Δ f/2, Δ f
y′SSSS(n)=ySSSS(n)·e-jπn/NN=0,1 ..., N-1.
(3)FFT；
Time-domain signal is transformed into frequency domain, obtained
(4) with the relevant treatments of SSSS sequences；
After conversion by time domain to frequency domain, false subcarrier is removed, obtains YSSSS(k), k is subcarrier index.SSSS
Coherent detection can be noncoherent detection or Differential Detection, but be not limited to this.Below with non-coherent detection methods,
If XvRepresent v group SSSS codes, wherein v=0,1 ..., 167 is related to the segmentation of SSSS local codes to obtained frequency domain SSSS.
(5) energy normalized is handled；
Correlation energy value carries out frequency domain SSSS symbol energy normalizeds, is avoided that because SSSS symbol powers retract
Influence to SSSS detection performances.
(6) accumulation calculating；
Complete between intersymbol, antenna and added up during Sidelink synchronizing signals transmission week：
In formula, m represents relevant segments instruction, and M represents segmentation number, and B represents the length of section；P, q represent that antenna refers to respectively
Show and indicate that P, Q represent antenna number and accumulation period number respectively with accumulation period.
(7) peak value searching；
Carry out peak value searching and obtain SSSS group numbers,
In the range of being positioned over due to detection terminal, detection terminal can select that then to receive priority higher using base station to send out
The transmission terminal signaling of timing reference is sent, the SL-ID so obtained is
It should be noted that in embodiments of the present invention, when detection terminal is positioned over outside scope, PSSS Sequence Detections
Information can be used what is known in advance in the prior art, it is possible to use by being obtained after carrying out channel impulse response estimation to PSSS symbols
The PSSS Sequence Detection information obtained.Such as：In method as shown in Figure 4, use by carrying out channel to PSSS symbols
The PSSS Sequence Detection information obtained after impulse response estimation.When in the range of terminal is positioned over, as shown in figure 5, can pass through
Other methods know PSSS Sequence Detection information, then when carrying out SSSS detections, it is believed that the PSSS Sequence Detection information is pre-
First know.
Embodiment five
To realize the method for SSSS in above-mentioned detection D2D, the embodiment of the present invention also provides the dress of SSSS in detection D2D a kind of
Put.As shown in fig. 6, described device includes：Acquisition module 601, adjusting module 602, determining module 603；Wherein,
Acquisition module 601, for obtaining main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals
SSSS symbols；
Adjusting module 602, for obtaining the SSSS's by carrying out channel impulse response estimation to the PSSS symbols
Adjustment information, the SSSS symbols are adjusted according to the adjustment information to obtain accurate SSSS symbols；
Wherein, adjusting module 602 obtains the SSSS's by carrying out channel impulse response estimation to the PSSS symbols
Smart timing offset value includes：Relevant treatment, the Fourier of Fourier transformation and PSSS sequences are carried out to the PSSS symbols successively
The smart timing offset value of the SSSS is obtained after inverse transformation, energy balane, accumulation calculating and peak value searching.
Determining module 603, the sidelink for obtaining SSSS by the detection to the accurate SSSS symbols identify SL-
ID。
Wherein it is determined that module 603 is specifically used for：Fourier transformation and SSSS are carried out to the accurate SSSS symbols successively
Relevant treatment, the energy normalized of sequence handle, obtain the SL-ID of the SSSS after accumulation calculating and peak value searching.
Here, adjusting module 602 can be specifically used for：By carrying out channel impulse response estimation acquisition to the PSSS symbols
The smart timing offset information of the SSSS, adjustment is timed to the SSSS symbols according to the smart timing offset information and obtained
The accurate SSSS symbols.
Adjusting module 602 can be specifically used for：By being carried out to the PSSS symbols described in channel impulse response estimation acquisition
SSSS smart timing offset information and integer frequency offset information；The SSSS symbols are carried out according to the smart timing offset information
Timing adjustment, and frequency deviation compensation is carried out to the SSSS symbols according to the integer frequency offset information, obtain the accurate SSSS
Symbol.
Adjusting module 602 is additionally operable to：The PSSS is obtained by carrying out channel impulse response estimation to the PSSS symbols
Sequence Detection value；Accordingly, determining module 603 is used to determine to gather corresponding to the Sequence Detection value of the PSSS, according to
SSSS group numbers determine the SI-ID in the set.
As shown in fig. 7, described device also includes：Fraction frequency deviation module 604, is used for：Obtain fraction frequency deviation information；According to institute
State fraction frequency deviation information and frequency deviation compensation is carried out to the SSSS symbols.
In embodiments of the present invention, SSSS device can pass through a processor in detection D2D provided in an embodiment of the present invention
Realized with memory, wherein, there are computer executable instructions in memory；Processor is used to refer to according to the computer is executable
Order performs following operate：Obtain main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals SSSS symbols；It is logical
The adjustment information for carrying out channel impulse response estimation to the PSSS symbols and obtaining the SSSS is crossed, according to the adjustment information pair
The SSSS symbols are adjusted to obtain accurate SSSS symbols；Obtain SSSS's by the detection to the accurate SSSS symbols
Sidelink identifies SL-ID
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (14)
1. a kind of method of auxiliary sidelink synchronizing signals in detection D2D, it is characterised in that methods described includes：
Obtain main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals SSSS symbols；
The adjustment information for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols, according to the adjustment
Information is adjusted to obtain accurate SSSS symbols to the SSSS symbols；
The sidelink that SSSS is obtained by the detection to the accurate SSSS symbols identifies SL-ID.
2. according to the method for claim 1, it is characterised in that described by carrying out channel impulse sound to the PSSS symbols
The adjustment information of the SSSS should be estimated to obtain, the SSSS symbols are adjusted to obtain according to the adjustment information accurate
SSSS symbols include：
The smart timing offset information for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols, according to institute
State smart timing offset information adjustment is timed to the SSSS symbols and obtain the accurate SSSS symbols.
3. according to the method for claim 1, it is characterised in that described by carrying out channel impulse sound to the PSSS symbols
The adjustment information of the SSSS should be estimated to obtain, the SSSS symbols are adjusted to obtain according to the adjustment information accurate
SSSS symbols include：
The smart timing offset information and integer for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Times frequency deviation information；
Adjustment is timed to the SSSS symbols according to the smart timing offset information, and according to the integer frequency offset information
Frequency deviation compensation is carried out to the SSSS symbols, obtains the accurate SSSS symbols.
4. according to the method for claim 3, it is characterised in that methods described also includes：
Obtain fraction frequency deviation information；
Frequency deviation compensation is carried out to the SSSS symbols according to the fraction frequency deviation information.
5. according to the method for claim 1, it is characterised in that methods described also includes：
The Sequence Detection value for obtaining the PSSS by carrying out channel impulse response estimation to the PSSS symbols；
Determine to gather corresponding to the Sequence Detection value of the PSSS, the SI-ID is determined in the set according to SSSS group numbers.
6. according to the method for claim 1, it is characterised in that described by carrying out channel impulse sound to the PSSS symbols
It should estimate that the smart timing offset value for obtaining the SSSS includes：
Fourier transformation, relevant treatment, inverse Fourier transform, energy meter with PSSS sequences are carried out to the PSSS symbols successively
Calculate, obtain the smart timing offset value of the SSSS after accumulation calculating and peak value searching.
7. according to the method for claim 1, it is characterised in that the detection by the accurate SSSS symbols obtains
SSSS sidelink marks SL-ID includes：
Fourier transformation is carried out to the accurate SSSS symbols successively, handled with the relevant treatment of SSSS sequences, energy normalized,
The SL-ID of the SSSS is obtained after accumulation calculating and peak value searching.
8. the device of auxiliary sidelink synchronizing signals in a kind of detection D2D, it is characterised in that described device includes：Acquisition module,
Adjusting module, determining module；Wherein,
The acquisition module, for obtaining main sidelink synchronizing signals PSSS symbols and auxiliary sidelink synchronizing signals SSSS symbols
Number；
The adjusting module, for the adjustment for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Information, the SSSS symbols are adjusted according to the adjustment information to obtain accurate SSSS symbols；
The determining module, the sidelink for obtaining SSSS by the detection to the accurate SSSS symbols identify SL-ID.
9. device according to claim 8, it is characterised in that the adjusting module is specifically used for：
The smart timing offset information for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols, according to institute
State smart timing offset information adjustment is timed to the SSSS symbols and obtain the accurate SSSS symbols.
10. device according to claim 8, it is characterised in that the adjusting module is specifically used for：
The smart timing offset information and integer for obtaining the SSSS by carrying out channel impulse response estimation to the PSSS symbols
Times frequency deviation information；
Adjustment is timed to the SSSS symbols according to the smart timing offset information, and according to the integer frequency offset information
Frequency deviation compensation is carried out to the SSSS symbols, obtains the accurate SSSS symbols.
11. device according to claim 10, it is characterised in that described device also includes：Fraction frequency deviation module, is used for：
Obtain fraction frequency deviation information；
Frequency deviation compensation is carried out to the SSSS symbols according to the fraction frequency deviation information.
12. device according to claim 8, it is characterised in that the adjusting module is additionally operable to：
The Sequence Detection value for obtaining the PSSS by carrying out channel impulse response estimation to the PSSS symbols；
Determine to gather corresponding to the Sequence Detection value of the PSSS, the SI-ID is determined in the set according to SSSS group numbers.
13. device according to claim 8, it is characterised in that the adjusting module to the PSSS symbols by carrying out
The smart timing offset value that channel impulse response estimation obtains the SSSS includes：
Fourier transformation, relevant treatment, inverse Fourier transform, energy meter with PSSS sequences are carried out to the PSSS symbols successively
Calculate, obtain the smart timing offset value of the SSSS after accumulation calculating and peak value searching.
14. device according to claim 8, it is characterised in that the determining module is specifically used for：
Fourier transformation is carried out to the accurate SSSS symbols successively, handled with the relevant treatment of SSSS sequences, energy normalized,
The SL-ID of the SSSS is obtained after accumulation calculating and peak value searching.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610824964.7A CN107820273B (en) | 2016-09-14 | 2016-09-14 | Method and device for detecting synchronization signal of sidelink in D2D |
| PCT/CN2017/095016 WO2018049931A1 (en) | 2016-09-14 | 2017-07-28 | Method and device for determining sidelink synchronization signal in d2d |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610824964.7A CN107820273B (en) | 2016-09-14 | 2016-09-14 | Method and device for detecting synchronization signal of sidelink in D2D |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107820273A true CN107820273A (en) | 2018-03-20 |
| CN107820273B CN107820273B (en) | 2020-05-19 |
Family
ID=61600698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610824964.7A Active CN107820273B (en) | 2016-09-14 | 2016-09-14 | Method and device for detecting synchronization signal of sidelink in D2D |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107820273B (en) |
| WO (1) | WO2018049931A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019201165A1 (en) * | 2018-04-19 | 2019-10-24 | 中兴通讯股份有限公司 | Method for allocating sidelink resource, device, and system |
| CN110800367A (en) * | 2019-09-29 | 2020-02-14 | 北京小米移动软件有限公司 | Direct connection communication operation processing method and device and storage medium |
| CN110971281A (en) * | 2018-09-28 | 2020-04-07 | 电信科学技术研究院有限公司 | Beam scanning method, beam configuration method, terminal and network equipment |
| CN111050298A (en) * | 2018-10-15 | 2020-04-21 | 华为技术有限公司 | Method for sending synchronization signal and communication equipment |
| CN111565447A (en) * | 2019-02-14 | 2020-08-21 | 电信科学技术研究院有限公司 | Sending method, receiving method and equipment for synchronous broadcast information |
| CN111629351A (en) * | 2020-05-12 | 2020-09-04 | 上海大学 | Terminal auxiliary synchronization method and system for Internet of vehicles intelligent traffic system |
| CN113940118A (en) * | 2019-06-13 | 2022-01-14 | 高通股份有限公司 | Device-to-device synchronization in wireless communications |
| WO2022027189A1 (en) * | 2020-08-03 | 2022-02-10 | Mediatek Singapore Pte. Ltd. | Enhancements for sl synchronization |
| CN114726701A (en) * | 2022-05-16 | 2022-07-08 | 为准（北京）电子科技有限公司 | Frequency offset estimation method and device |
| TWI783580B (en) * | 2020-08-03 | 2022-11-11 | 新加坡商聯發科技（新加坡）私人有限公司 | Mrthods for sidelink synchronization |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220159599A1 (en) * | 2019-01-11 | 2022-05-19 | Nokia Solutions And Networks Oy | Sidelink Synchronization Update |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105659675A (en) * | 2014-09-23 | 2016-06-08 | 华为技术有限公司 | Transmitter, receiver and methods for transmitting/ receiving synchronisation signals |
| US20160174174A1 (en) * | 2014-12-16 | 2016-06-16 | Lg Electronics Inc. | Method and apparatus for detecting synchronization signal in wireless communication system |
-
2016
- 2016-09-14 CN CN201610824964.7A patent/CN107820273B/en active Active
-
2017
- 2017-07-28 WO PCT/CN2017/095016 patent/WO2018049931A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105659675A (en) * | 2014-09-23 | 2016-06-08 | 华为技术有限公司 | Transmitter, receiver and methods for transmitting/ receiving synchronisation signals |
| US20160174174A1 (en) * | 2014-12-16 | 2016-06-16 | Lg Electronics Inc. | Method and apparatus for detecting synchronization signal in wireless communication system |
Non-Patent Citations (3)
| Title |
|---|
| HUAWEI, HISILICON: "D2DSS design", 《3GPP TSG RAN WG1 MEETING #77， R1-142342》 * |
| HUAWEI，HISILICON: "Remaining details of D2D synchronization signals", 《3GPP TSG RAN WG1 MEETING #78， R1-142843》 * |
| QUALCOMM INCORPORATED: "Signal Design for D2D Synchronization", 《3GPP TSG-RAN WG1 #78，R1-142964》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11601936B2 (en) | 2018-04-19 | 2023-03-07 | Zte Corporation | Method and device for configuring sidelink resources |
| WO2019201165A1 (en) * | 2018-04-19 | 2019-10-24 | 中兴通讯股份有限公司 | Method for allocating sidelink resource, device, and system |
| CN110971281A (en) * | 2018-09-28 | 2020-04-07 | 电信科学技术研究院有限公司 | Beam scanning method, beam configuration method, terminal and network equipment |
| CN110971281B (en) * | 2018-09-28 | 2021-11-23 | 大唐移动通信设备有限公司 | Beam scanning method, beam configuration method, terminal and network equipment |
| CN111050298B (en) * | 2018-10-15 | 2021-10-22 | 华为技术有限公司 | Method for sending synchronization signal and communication equipment |
| CN111050298A (en) * | 2018-10-15 | 2020-04-21 | 华为技术有限公司 | Method for sending synchronization signal and communication equipment |
| CN111565447A (en) * | 2019-02-14 | 2020-08-21 | 电信科学技术研究院有限公司 | Sending method, receiving method and equipment for synchronous broadcast information |
| CN113940118A (en) * | 2019-06-13 | 2022-01-14 | 高通股份有限公司 | Device-to-device synchronization in wireless communications |
| WO2021056564A1 (en) * | 2019-09-29 | 2021-04-01 | 北京小米移动软件有限公司 | Method and device for processing sidelink operation, and storage medium |
| CN110800367B (en) * | 2019-09-29 | 2023-01-17 | 北京小米移动软件有限公司 | Direct connection communication operation processing method and device and storage medium |
| CN110800367A (en) * | 2019-09-29 | 2020-02-14 | 北京小米移动软件有限公司 | Direct connection communication operation processing method and device and storage medium |
| CN111629351A (en) * | 2020-05-12 | 2020-09-04 | 上海大学 | Terminal auxiliary synchronization method and system for Internet of vehicles intelligent traffic system |
| CN111629351B (en) * | 2020-05-12 | 2022-03-08 | 上海大学 | Terminal auxiliary synchronization method and system for Internet of vehicles intelligent traffic system |
| WO2022027189A1 (en) * | 2020-08-03 | 2022-02-10 | Mediatek Singapore Pte. Ltd. | Enhancements for sl synchronization |
| TWI783580B (en) * | 2020-08-03 | 2022-11-11 | 新加坡商聯發科技（新加坡）私人有限公司 | Mrthods for sidelink synchronization |
| CN114726701A (en) * | 2022-05-16 | 2022-07-08 | 为准（北京）电子科技有限公司 | Frequency offset estimation method and device |
| CN114726701B (en) * | 2022-05-16 | 2022-08-12 | 为准（北京）电子科技有限公司 | Frequency offset estimation method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107820273B (en) | 2020-05-19 |
| WO2018049931A1 (en) | 2018-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107820273A (en) | The method and device of sidelink synchronizing signal in a kind of detection D2D | |
| CN107959922A (en) | The method and device of main sidelink synchronizing signals in a kind of detection D2D | |
| EP3427524B1 (en) | Narrowband wireless communications cell search | |
| CN109076609B (en) | Method and receiver for preamble detection and time of arrival estimation | |
| CN101295999B (en) | Detection method for accidental precursor access | |
| CN104065604B (en) | Signal synchronizing method, receiving terminal and system | |
| CN101388723B (en) | Radio communication timing synchronization method, cell searching method and system | |
| CN104618289B (en) | Method and device for master sync signal detection | |
| CN110301123B (en) | Coherent detection of large physical random access control channel (PRACH) delays | |
| CN106161317B (en) | Synchronization method and device | |
| CN103079227B (en) | Random access detection method and system used in LTE (Long Term Evolution) system | |
| CN107801199B (en) | Method, device and system for positioning interference source cell | |
| CN102573044B (en) | Method and device for locating interference source cell | |
| CN111093252B (en) | Rapid hierarchical searching method for narrow-band Internet of things NB-IoT | |
| WO2017211212A1 (en) | Method and device for positioning interference source cell, and base station | |
| CN109428847A (en) | The detection of the subsynchronous signal of downlink and synchronous method and device in NB-IoT system | |
| CN115002894B (en) | Uplink timing synchronization method, device, equipment and storage medium | |
| CN104660362B (en) | The detection method and equipment of a kind of master sync signal | |
| JP6507020B2 (en) | Cell search method and user apparatus | |
| EP2787667B1 (en) | LTE cell detecting apparatus in multi-cell environment | |
| CN109525355A (en) | A kind of signal interference method and device | |
| CN103905363A (en) | Secondary synchronization signal (SSS) detection method and device and network mode judgment method | |
| CN102340796A (en) | Secondary synchronization channel detection method and device | |
| CN106507467A (en) | A kind of method of non real-time LTE uplink datas Timing Synchronization | |
| CN108989259A (en) | The time offset estimation method and system of wireless comprehensive test instrument narrowband Physical Uplink Shared Channel |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |