CN106304272B - A kind of rapid frequency-sweeping method, apparatus and terminal - Google Patents
A kind of rapid frequency-sweeping method, apparatus and terminal Download PDFInfo
- Publication number
- CN106304272B CN106304272B CN201510366803.3A CN201510366803A CN106304272B CN 106304272 B CN106304272 B CN 106304272B CN 201510366803 A CN201510366803 A CN 201510366803A CN 106304272 B CN106304272 B CN 106304272B
- Authority
- CN
- China
- Prior art keywords
- frequency point
- frequency
- signal
- point
- synchronous
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The invention discloses a kind of rapid frequency-sweeping methods, comprising: chooses the frequency point that 2N+1 be immediately adjacent to each other meet preset condition, the N is positive integer；Signal reception is carried out using the center frequency point in the 2N+1 frequency point as frequency point is received；The center frequency point is the N+1 frequency point in the 2N+1 frequency point；It is synchronous to other 2N frequency point in addition to the center frequency point to carry out frequency deviation compensation deals；Based on the center frequency point and the 2N frequency point through frequency deviation compensation deals, the signal described in the road 2N+1, which synchronizes, synchronizes a yard relevant treatment.The present invention further simultaneously discloses the device and terminal for realizing the method.
Description
Technical field
The present invention relates in mobile communication field frequency-scan technique more particularly to a kind of rapid frequency-sweeping method, apparatus
And terminal.
Background technique
For digital communication system, the global system for mobile communications including Generation Mobile Telecommunication System technology (2G)
(GSM), the wideband code division multiple access (WCDMA) of 3rd generation mobile communication technology (3G), TD SDMA (TD-SCDMA),
The long term evolution (LTE) of fourth generation mobile communication technology (4G), can generally distribute several frequency ranges.Frequency sweep process is exactly UE terminal root
According to operator provide frequency range instruction, signal frequency point is scanned in several frequency ranges, and the strongest frequency point of selection signal into
Row is resident, and the experience that frequency sweep time effects user when booting uses mobile phone, the start process taken long time is to be difficult to bear
It receives.
Ideal frequency range is to be only assigned to a kind of standard, and between each frequency point, there are biggish difference powers, thus only
Target frequency point and adjacent frequency can be distinguished by difference power.But the actual situation is that since band resource is that have
Limit, in a frequency range, it might not be fully allocated to a kind of standard, but there is likely to be the frequency points of other standards.Therefore,
In order to identify non-standard frequency point, need to carry out frequency point confirmation, still, the frequency based on synchronous code correlation during frequency sweep
Point confirmation process is the process taken a long time.
By taking WCDMA as an example, do not synchronized when due to frequency sweep, it is therefore necessary in 2560 slot length total correlation with
It is confirmed whether that there are main scrambling code (Primary SCH, PSCH).Meanwhile PSCH common power accounting only -15dB in wcdma,
It obtains satisfied correlation peak and needs the cumulative of longer time slot.Agreement predetermined channel grid is 200kHz, i.e., in WCDMA signal
Heart point is likely located in frequency range on the frequency point of any one 200kHz, and frequency range is more, needs to be excluded by PSCH correlation
False frequency point is more.Equally, for LTE system, frequency range is more, needs to carry out primary synchronization signal (Primary
Synchronization signal, PSS) related confirmation frequency point it is more.
Summary of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of rapid frequency-sweeping method, apparatus and terminal.
The embodiment of the invention provides a kind of rapid frequency-sweeping methods, this method comprises:
The frequency point that 2N+1 be immediately adjacent to each other meet preset condition is chosen, the N is positive integer；
Signal reception is carried out using the center frequency point in the 2N+1 frequency point as frequency point is received；The center frequency point is institute
State the N+1 frequency point in 2N+1 frequency point；
It is synchronous to other 2N frequency point in addition to the center frequency point to carry out frequency deviation compensation deals；
Based on the center frequency point and the 2N frequency point through frequency deviation compensation deals, the signal described in the road 2N+1 is synchronous
Synchronize a yard relevant treatment.
In the embodiment of the present invention, the frequency point chosen 2N+1 be immediately adjacent to each other and meet preset condition, comprising:
Designated frequency band is scanned by preset step-length, obtains effective frequency point；The corresponding performance number of effective frequency point
Greater than preset power threshold；
Code correlation is synchronized for effective frequency point, therefrom determines candidate corresponding with the communication pattern of the signal
Frequency point；
2N+1 frequency point being immediately adjacent to each other sequentially is chosen from the candidate frequency point.
It is described that frequency deviation compensation deals are carried out to other 2N frequency point in the embodiment of the present invention, comprising:
It is carried out according to the width of the received signal and a grid corresponding with the communication pattern of the signal
Frequency deviation compensation calculation.
In the embodiment of the present invention, the signal described in the road 2N+1, which synchronizes, synchronizes a yard relevant treatment, comprising:
A yard relevant calculation is synchronized to the signal all the way based on the center frequency point, the calculating process is according to reception
The signal and terminal baseband generate local synchronization code signal carry out；Meanwhile
Based on the 2N frequency point through frequency deviation compensation deals, the signal described in the road 2N synchronizes a yard relevant calculation, institute
Calculating process is stated to carry out according to the local synchronization code signal that signal and terminal baseband generate that receives through overdeviation compensation.
The embodiment of the invention also provides a kind of rapid frequency-sweeping device, which includes: frequency offset compensation block and synchronous code
Correlation module；Wherein,
The frequency offset compensation block, for choosing the 2N+1 the being immediately adjacent to each other frequency points for meeting preset condition, the N is positive
Integer；Signal reception is carried out using the center frequency point in the 2N+1 frequency point as frequency point is received；The center frequency point is described
The N+1 frequency point in 2N+1 frequency point；It is synchronous to other 2N frequency point in addition to the center frequency point to carry out at frequency deviation compensation
Reason；
The synchronous code correlation module, for based on the center frequency point and the 2N frequency through frequency deviation compensation deals
Point, the signal described in the road 2N+1, which synchronizes, synchronizes a yard relevant treatment.
In the embodiment of the present invention, the frequency offset compensation block includes:
Frequency point chooses module, for choosing the 2N+1 the being immediately adjacent to each other frequency points for meeting preset condition；
Signal receiving module, for being connect using the center frequency point in the 2N+1 frequency point as frequency point progress signal is received
It receives；
Processing module, for carrying out frequency deviation compensation deals to other 2N frequency point in addition to the center frequency point are synchronous.
In the embodiment of the present invention, the frequency point chooses module and includes:
Effective frequency point determination unit obtains effective frequency point for being scanned by preset step-length to designated frequency band；It is described
Effective corresponding performance number of frequency point is greater than preset power threshold；
Candidate frequency point determination unit therefrom determines and the letter for synchronizing code correlation for effective frequency point
Number the corresponding candidate frequency point of communication pattern；
Selection unit, for sequentially choosing 2N+1 frequency point being immediately adjacent to each other from the candidate frequency point.
In the embodiment of the present invention, the processing module includes 2N processor,
Each processor, for according to the received signal and one corresponding with the communication pattern of the signal
The width of grid carries out frequency deviation compensation calculation.
In the embodiment of the present invention, the synchronous code correlation module includes: 2N+1 synchronous code correlator, wherein
One synchronous code correlator, for synchronizing a yard correlometer to the signal all the way based on the center frequency point
It calculates, the calculating process is carried out according to the local synchronization code signal that the received signal and terminal baseband generate；Meanwhile
Other 2N synchronous code correlator, for based on the 2N frequency point through frequency deviation compensation deals, to the road 2N
The signal synchronizes a yard relevant calculation, and the calculating process is according to the reception signal and terminal through overdeviation compensation
The local synchronization code signal that base band generates carries out.
The embodiment of the invention also provides a kind of terminal, the terminal includes: devices described above.
Rapid frequency-sweeping method, apparatus and terminal provided in an embodiment of the present invention are chosen 2N+1 be immediately adjacent to each other and are met in advance
If the frequency point of condition, the N is positive integer；It is connect using the center frequency point in the 2N+1 frequency point as frequency point progress signal is received
It receives；The center frequency point is the N+1 frequency point in the 2N+1 frequency point；To other 2N frequency in addition to the center frequency point
Point is synchronous to carry out frequency deviation compensation deals；Based on the center frequency point and the 2N frequency point through frequency deviation compensation deals, to 2N+
Signal described in 1 tunnel, which synchronizes, synchronizes a yard relevant treatment.As it can be seen that the embodiment of the present invention can realize the same of the synchronous multiple frequency points of progress
The confirmation of code correlation is walked, with serial process in the prior art, the present invention can effectively reduce the synchronous code relevant time, to reach
The frequency sweep time is reduced, the purpose of user experience is promoted.
Detailed description of the invention
In attached drawing (it is not necessarily drawn to scale), similar appended drawing reference can describe phase in different views
As component.Similar reference numerals with different letter suffix can indicate the different examples of similar component.Attached drawing with example and
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is the method for embodiment of the present invention implementation process schematic diagram；
Fig. 2 is described device of embodiment of the present invention structural schematic diagram one；
Fig. 3 is the structural schematic diagram of frequency offset compensation block described in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram that frequency point described in the embodiment of the present invention chooses module；
Fig. 5 is the structural schematic diagram of synchronous code correlation module described in the embodiment of the present invention；
Fig. 6 is the SCH channel schematic diagram in WCDMA described in the embodiment of the present invention；
Fig. 7 is the synchronization code signal schematic diagram in LTE described in the embodiment of the present invention；
Fig. 8 is frequency sweep flow diagram described in the embodiment of the present invention；
Fig. 9 is synchronous code characteristic schematic diagram described in the embodiment of the present invention；
Figure 10 is the structural schematic diagram of two described device of scene of the present invention.
Specific embodiment
In the embodiment of the present invention, the frequency point that 2N+1 be immediately adjacent to each other meet preset condition is chosen, the N is positive whole
Number；Signal reception is carried out using the center frequency point in the 2N+1 frequency point as frequency point is received；The center frequency point is the 2N+
The N+1 frequency point in 1 frequency point；It is synchronous to other 2N frequency point in addition to the center frequency point to carry out frequency deviation compensation deals；
Based on the center frequency point and the 2N frequency point through frequency deviation compensation deals, the signal described in the road 2N+1, which synchronizes, to be synchronized
Code relevant treatment.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the implementation process schematic diagram of the method for the embodiment of the present invention, as shown in Figure 1, comprising:
Step 101: choosing the frequency point that 2N+1 be immediately adjacent to each other meet preset condition, the N is positive integer；
Step 102: carrying out signal reception using the center frequency point in the 2N+1 frequency point as frequency point is received；The center
Frequency point is the N+1 frequency point in the 2N+1 frequency point；
Step 103: synchronous to other 2N frequency point in addition to the center frequency point to carry out frequency deviation compensation deals；
Step 104: based on the center frequency point and the 2N frequency point through frequency deviation compensation deals, described in the road 2N+1
Signal, which synchronizes, synchronizes a yard relevant treatment.
In the embodiment of the present invention, the frequency point chosen 2N+1 be immediately adjacent to each other and meet preset condition, comprising:
Designated frequency band is scanned by preset step-length, obtains effective frequency point；The corresponding performance number of effective frequency point
Greater than preset power threshold, it may be assumed that the stronger frequency point of stick signal filters out the too weak frequency point of signal；
Code correlation is synchronized for effective frequency point, therefrom determines candidate corresponding with the communication pattern of the signal
Frequency point, it may be assumed that filter out the frequency point of the communication pattern of the non-signal；
2N+1 frequency point being immediately adjacent to each other sequentially is chosen from the candidate frequency point.
Here, the communication pattern can include: WCDMA and LTE.
It is described that frequency deviation compensation deals are carried out to other 2N frequency point in the embodiment of the present invention, comprising:
It is carried out according to the width of the received signal and a grid corresponding with the communication pattern of the signal
Frequency deviation compensation calculation.The calculating process can refer to following formula:
Dataout=Rin.*e-jω；
Wherein, the DataoutIndicate frequency deviation compensation deals result；The RinIt indicates the received signal, can also manage
Solution is input signal；The ω indicates the width of the corresponding grid of communication pattern.
In the embodiment of the present invention, the signal described in the road 2N+1, which synchronizes, synchronizes a yard relevant treatment, comprising:
A yard relevant calculation is synchronized to the signal all the way based on the center frequency point, the calculating process is according to reception
The signal and terminal baseband generate local synchronization code signal carry out；Calculating process can refer to following formula:
Corr=Rin.*conj(PSC)；
Meanwhile a yard correlometer is synchronized based on 2N frequency point signal described in the road 2N through frequency deviation compensation deals
It calculates, the calculating process is according to the local synchronization code signal for receiving signal and terminal baseband and generating through overdeviation compensation
It carries out；Calculating process can refer to following formula:
Corr=Dataout*conj(PSC)。
As it can be seen that the embodiment of the present invention can realize the synchronous synchronous code correlation confirmation for carrying out multiple frequency points, and in the prior art
Serial process, the present invention can effectively reduce the synchronous code relevant time, reduce the frequency sweep time to reach, promote user experience
Purpose.
The embodiment of the invention also provides a kind of rapid frequency-sweeping devices, as shown in Fig. 2, the device includes: frequency deviation compensation mould
Block 201 and synchronous code correlation module 202；Wherein,
The frequency offset compensation block 201, for choosing the 2N+1 the being immediately adjacent to each other frequency points for meeting preset condition, the N
For positive integer；Signal reception is carried out using the center frequency point in the 2N+1 frequency point as frequency point is received；The center frequency point is
The N+1 frequency point in the 2N+1 frequency point；It is synchronous to other 2N frequency point in addition to the center frequency point to carry out frequency deviation benefit
Repay processing；
The synchronous code correlation module 202, for based on the center frequency point and the 2N through frequency deviation compensation deals
A frequency point, the signal described in the road 2N+1, which synchronizes, synchronizes a yard relevant treatment.
In actual application, the frequency offset compensation block 201 and synchronous code correlation module 202 can pass through central processing
Device (Central Processing Unit, CPU), digital signal processor (Digital Signal Processor, DSP)
Or programmable logic array (Field-Programmable Gate Array, FPGA) is realized.
In one embodiment, as shown in figure 3, the frequency offset compensation block 201 includes:
Frequency point chooses module 2011, for choosing the 2N+1 the being immediately adjacent to each other frequency points for meeting preset condition；
Signal receiving module 2012, for carrying out signal using the center frequency point in the 2N+1 frequency point as frequency point is received
It receives；
Processing module 2013, for being carried out at frequency deviation compensation to other 2N frequency point in addition to the center frequency point are synchronous
Reason.
In one embodiment, as shown in figure 4, frequency point selection module 2011 includes:
Effective frequency point determination unit 20111, for being scanned by preset step-length to designated frequency band, obtains effective frequency
Point；The corresponding performance number of effective frequency point is greater than preset power threshold i.e.: the stronger frequency point of stick signal, and signal is too weak
Frequency point filter out；
Candidate frequency point determination unit 20112, for synchronizing code correlation, therefrom determining and institute for effective frequency point
State the corresponding candidate frequency point of communication pattern of signal, it may be assumed that filter out the frequency point of the communication pattern of the non-signal；
Selection unit 20113, for sequentially choosing 2N+1 frequency point being immediately adjacent to each other from the candidate frequency point.
Here, the communication pattern includes: WCDMA and LTE.
In the embodiment of the present invention, the processing module 2013 includes 2N processor,
Each processor, for according to the received signal and one corresponding with the communication pattern of the signal
The width of grid carries out frequency deviation compensation calculation.The calculating process can refer to following formula:
Dataout=Rin.*e-jω；
Wherein, the DataoutIndicate frequency deviation compensation deals result；The RinIt indicates the received signal, can also manage
Solution is input signal；The ω indicates the width of the corresponding grid of communication pattern.
In the embodiment of the present invention, the synchronous code correlation module 202 includes: 2N+1 synchronous code correlator 2021, such as Fig. 5
It is shown, wherein
One synchronous code correlator 2021, for synchronizing code correlation to the signal all the way based on the center frequency point
It calculates, the calculating process is carried out according to the local synchronization code signal that the received signal and terminal baseband generate；It calculates
Process can refer to following formula:
Corr=Rin.*conj(PSC)；
Meanwhile other 2N synchronous code correlator 2021, for based on the 2N frequency through frequency deviation compensation deals
Signal described in the road Dian Dui 2N synchronizes a yard relevant calculation, and the calculating process is according to the reception signal compensated through overdeviation
And the local synchronization code signal that terminal baseband generates carries out.Calculating process can refer to following formula:
Corr=Dataout*conj(PSC)。
The embodiment of the invention also provides a kind of terminal, the terminal includes: devices described above.
To facilitate the understanding of the present invention, the relevant technology of frequency sweep is briefly described below.
One, synchronous code
Mobile phone terminal searched for usually using synchronous channel SCH (synchronization channel) activation cell and
Neighboring community.
In wcdma, SCH includes two sub-channels, PSCH (Primary SCH) and SSCH (Secondary SCH),
PSCH and SSCH includes 256 chips, is always sent in the head 256chip of each time slot, as shown in Figure 6.It is every for PSCH
A time slot is identical, and for SSCH, one is chosen from the set of 16 256 chips as needed in each time slot, specifically
Selection mode it is related with scrambling code group.For frequency sweep process, due to only needing to confirm whether there is or not WCDMA frequency point, here
It can using only PSCH synchronous code correlation.
In LTE, synchronization signal includes primary synchronization signal PSS (Primary synchronization signal) and auxiliary
Synchronization signal SSS (Secondary synchronization signal).For LTE system, a radio frames (10ms long
Degree) it include 10 subframes (1ms length), each subframe includes 2 time slots again, and the length of each time slot is 0.5ms, therefore, one
A radio frames include the time slot of 20 0.5ms in total.The last one of the 0th and the 10th time slot is always located in for FDD, PSS
In OFDM symbol, SSS is then located at before the PSS of the 0th and the 10th time slot in an OFDM symbol, as shown in Figure 7.For frequency sweep mistake
For journey, due to only needing to confirm whether there is or not LTE frequency point, PSS synchronous code correlation is used only here can.
Two, frequency sweep process
For digital communication system, WCDMA, TD-SCDMA of the GSM including 2G, 3G, the LTE of 4G can generally divide
With several frequency ranges.By taking WCDMA standard as an example, WCDMA provides that frequency point signal bandwidth is 5MHz, channel grid according to agreement 25.101
For 200kHz, the integral multiple for being spaced necessarily 200kHz at frequency point center.Mobile communication system (UMTS) for WCDMA if be assigned with
Dry frequency range, the smallest frequency bandwidth are 10MHz (BAND VI), and effective frequency point 25, maximum bin width is 75MHz (BAND
III), effective frequency point 350.
Still by taking WCDMA as an example, it is assumed that have 3 frequency points Fa, Fb, Fc in frequency range, wherein Fa is not W frequency point, such as Fig. 8 institute
Show.Frequency sweep can carry out coarse scan in the frequency range first with a fixed step size Fr and calculate the RSSI of each coarse scan frequency point shown in Fig. 8 (a)
Power, and power sequence is carried out to coarse scan frequency point F0-F7.As shown in Fig. 8 (b), the lower frequency range of power is filtered out, selects power
Stronger several frequency point F1, F4, F5, F6 are swept for essence.In essence is swept, to may in a certain range around the candidate coarse scan frequency point
Candidate frequency point traversed, it is related successively to carry out synchronous code to each smart frequency sweep point.When input frequency point and true frequency point do not weigh
It closes, i.e., when being at least spaced the integral multiple of a grid, at this point, without correlation peak, it can thinking this frequency point not is W frequency
Point, exclusion report except frequency point, the frequency point confirmation method of principle synchronous code as detailed below.
Three, the frequency point confirmation based on synchronous code
Ideal frequency range is to be only assigned to a kind of standard, and between each frequency point, there are biggish difference powers, thus only
Target frequency point and adjacent frequency can be distinguished by difference power.
But the actual situation is that in a frequency range, one kind might not be fully allocated to since band resource is limited
Standard, but there is likely to be the frequency points of other standards, it means that the high power frequency point found in frequency range may also not originally
The signal of standard, the frequency point of mistake, which is reported, will cause cell searching to alias point, and cell searching process is caused to extend even
Failure, thus it is necessary to identify non-standard frequency point and excluded for frequency sweep.
For WCDMA or LTE base station, respective synchronous code can be all sent, therefore, the detection of synchronous code can be passed through
It is confirmed whether it is WCDMA or LTE frequency point, is expressed as follows using formula.
Corr=Rin.*conj (PSC)=(PSC+OCNS+Noise) * conj (PSC),
RinIt is input signal, and the sum of PSC+OCNS+noise can be expressed as, wherein PSC is the synchronization that base station is sent
Code signal, OCNS are other code channel signals with scrambling code, and Noise is interference noise.It is PSCH, PSCH for WCDMA, PSC
Have good correlation properties, only when related to PSCH signal alignment, can just obtain apparent correlation peak, and when and it is other
When signal is related or is misaligned related to PSCH signal, correlation peak cannot be all obtained.
After receiving the input signal containing PSCH, UE terminal can also generate a PSCH signal local, and with input
Signal carries out sliding correlation in a radio frames, can be in the position of PSCH signal if input signal contains PSCH signal
Biggish correlation peak is obtained, otherwise without relevant peaks, accordingly, it can be determined that whether go out in input signal containing the synchronous letter of PSCH
Number.
When input frequency point and true frequency point are not overlapped, i.e., are at least spaced the integral multiple of a grid, at this point, without correlation
Peak value.As shown in Figure 9, it is assumed that true frequency point is Fa, and frequency bandwidth is from F0-F3.At this point, input signal center frequency point is F2,
Its frequency bandwidth from F1-F4, then, the signal from F0-F1 is had lost in input signal bandwidth, and contain the frequency from F3-F4
Band interference, but this is not most important, important center frequency point offset phase rotation caused by input signal, can use public affairs
Formula is expressed as follows:
Corr=Rin.*conj (PSC)=(PSC+OCNS+Noise) * ejω*conj(PSC)。
As it can be seen that having had more a e in correlated processjωComponent, this changes the characteristics of signals of input synchronous code, so that and originally
The synchronous code that ground generates is related, correlation peak can be no longer obtained, so as to judge true frequency point.
Below with reference to concrete application scene, the present invention will be described in detail.
Scene one
It is still illustrated with Fig. 9 example, the frequency point of input signal center frequency point F2 and true frequency point Fa interval Fr*N is come
It says, most of frequency band between them is overlapping.Assuming that being WCDMA, input signal center frequency point and true frequency point interval one
A grid, i.e. 200kHz have 4.8MHz's then the input signal centered on F2 and the input signal centered on Fa compare
Bandwidth is overlapping, and therefore, the capacity volume variance between them is actually no more than 4%.If it is two grids in interval, i.e.,
400kHz, then, also having the bandwidth of 4.6MHz is overlapping, and the capacity volume variance between them is no more than 8%.This means that energy
Lose sufficiently small, the bandwidth of loss has substantially no effect on correlation properties.As long as signal caused by deviateing because of center frequency point
Rotation compensates, for example, to the input signal compensation-Fr*N centered on F2, then, and directly on true frequency point Fa
Reception signal correlation properties are identical, and energy loss can be ignored substantially, are formulated as follows:
Corr=Rin.*conj (PSC)=(PSC+OCNS+Noise) * ejω*e-jω*conj(PSC)；
Emulation explanation, it is related to synchronous code is done after the input signal compensation-Fr*N centered on F2, and be directly with Fa
The input signal at center is done synchronous code correlation and is compared, and influences on synchronous code correlation properties without what.
Accordingly, for synchronous code correlation, after receiving the input signal centered on F2 by RF, we can pass through frequency
Offset compensation restores its adjacent frequency signal out.If it is parallel synchronization code correlator is used, it is possible to by PSCH correlated process
Parallel by being serially changed to, to greatly speed up the relevant speed of synchronous code in frequency sweep, parallel synchronous code as shown in Figure 10 is related
Device.
It finds after tested, if parallel branch is 3, synchronous code correlation time can be reduced to original 1/3；If
Parallel branch is 5, then synchronous code correlation time can be reduced to original 1/5.Since synchronous code correlation acknowledging time occupies
The overwhelming majority of frequency sweep time, this also corresponds to the execution time for substantially reducing frequency sweep, improves user experience.
Scene two
This scene describes the relevant specific reality of parallel synchronous code using the scan module for WCDMA system as embodiment
Applying method, Figure 10 are corresponding apparatus structure schematic diagram, and the ADC1001 and DFE1002 are general module during frequency sweep, this
Place is no longer described in detail；The frequency offset compensation block 1003 and PSC correlator 1004 are main functional modules of the present invention, are respectively used to hold
The operation of row following step three and step 4, specific implementation step are as follows:
Step 1: coarse scan (obtains effective frequency point), specific:
With preset step-length, such as: step1 is scanned in designated frequency band, for each coarse scan frequency point, by power calculation
Module estimation receives the energy of data, and according to the descending M frequency point of reservation of energy (power)；For unreserved frequency point,
Then think that signal is too weak (the corresponding performance number of frequency point is less than preset power threshold), subsequent place can not be carried out to these frequency points
Reason searches the net time to achieve the purpose that shorten.
Step 2: essence sweeps and (obtains effective frequency point), specific:
The M frequency point that coarse scan is determined, it is believed that true frequency point is just in the range of these coarse scan frequency points, to positioned at these
Frequency point in range needs to synchronize a yard relevant treatment as the candidate frequency point that essence is swept, with therefrom determining and the signal
The corresponding candidate frequency point of communication pattern.
Step 1: two be the prior art, and will not be described here in detail.
Step 3: the frequency deviation compensation in base band, specific:
2N+1 essence being immediately adjacent to each other is selected to sweep determining candidate frequency point, N can use 1 or 2, and with this 2N+1 frequency point center
Signal reception is carried out as frequency point is received；
Here, the value of N is mainly determined by hardware condition, if being correspondingly arranged 3 synchronous code correlators, N in terminal
Value is 1；If being correspondingly arranged 5 synchronous code correlators in terminal, N value is 2.
Next module, i.e. PSC correlator 1004 can be directly passed to since there is no frequency departure for center frequency point
The confirmation of code correlation is synchronized, as shown in Figure 10.
But one is differed each other due to being constructed using center frequency point input signal for the adjacent frequency of center frequency point
Raster width, it is therefore desirable to frequency deviation be compensated by frequency offset compensation block 1003, had:
Dataout=Rin.*e-jω。
Step 4: parallel synchronous code correlation confirmation, specific:
Signal is received to multichannel (road 2N+1), is synchronized using 2N+1 synchronous code correlator and synchronizes a yard relevant treatment,
To accelerate synchronous code correlated process.
Step 5: carrying out true frequency point confirmation according to synchronous code correlation, specific:
After synchronous code is related, there is the frequency point of larger correlation by dependent threshold selection, and as true frequency point.
As it can be seen that the embodiment of the present invention can realize the synchronous synchronous code correlation confirmation for carrying out multiple frequency points, and in the prior art
Serial process, the present invention can effectively reduce the synchronous code relevant time, reduce the frequency sweep time to reach, promote user experience
Purpose.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (9)
1. a kind of rapid frequency-sweeping method suitable for WCDMA and LTE, which is characterized in that this method comprises:
The frequency point that 2N+1 be immediately adjacent to each other meet preset condition is chosen, the N is positive integer；
Signal reception is carried out using the center frequency point in the 2N+1 frequency point as frequency point is received；The center frequency point is the 2N
The N+1 frequency point in+1 frequency point；
It is synchronous to other 2N frequency point in addition to the center frequency point to carry out frequency deviation compensation deals；
Based on the center frequency point and the 2N frequency point through frequency deviation compensation deals, the signal described in the road 2N+1 is synchronous to be carried out
Synchronous code relevant treatment；
Wherein, the frequency point chosen 2N+1 be immediately adjacent to each other and meet preset condition, comprising:
Designated frequency band is scanned by preset step-length, obtains effective frequency point；The corresponding performance number of effective frequency point is greater than
Preset power threshold；
Code correlation is synchronized for effective frequency point, therefrom determines candidate frequency corresponding with the communication pattern of the signal
Point；
2N+1 frequency point being immediately adjacent to each other sequentially is chosen from the candidate frequency point.
2. the method according to claim 1, wherein described carry out frequency deviation compensation deals to other 2N frequency point,
Include:
Frequency deviation is carried out according to the width of the received signal and a grid corresponding with the communication pattern of the signal
Compensation calculation.
3. according to the method described in claim 2, it is characterized in that, the signal described in the road 2N+1 synchronizes and synchronizes a yard phase
Pass processing, comprising:
A yard relevant calculation is synchronized to the signal all the way based on the center frequency point, the calculating process is according to received institute
The local synchronization code signal that signal and terminal baseband generate is stated to carry out；Meanwhile
Based on the 2N frequency point through frequency deviation compensation deals, the signal described in the road 2N synchronizes a yard relevant calculation, the meter
Calculation process is carried out according to the local synchronization code signal that signal and terminal baseband generate that receives through overdeviation compensation.
4. a kind of rapid frequency-sweeping device suitable for WCDMA and LTE, which is characterized in that the device include: frequency offset compensation block and
Synchronous code correlation module；Wherein,
The frequency offset compensation block, for choosing the 2N+1 the being immediately adjacent to each other frequency points for meeting preset condition, the N is positive whole
Number；Signal reception is carried out using the center frequency point in the 2N+1 frequency point as frequency point is received；The center frequency point is the 2N+
The N+1 frequency point in 1 frequency point；It is synchronous to other 2N frequency point in addition to the center frequency point to carry out frequency deviation compensation deals；
The synchronous code correlation module, for based on the center frequency point and the 2N frequency point through frequency deviation compensation deals,
The signal described in the road 2N+1, which synchronizes, synchronizes a yard relevant treatment；
Wherein, the frequency point chosen 2N+1 be immediately adjacent to each other and meet preset condition, comprising:
Designated frequency band is scanned by preset step-length, obtains effective frequency point；The corresponding performance number of effective frequency point is greater than
Preset power threshold；
Code correlation is synchronized for effective frequency point, therefrom determines candidate frequency corresponding with the communication pattern of the signal
Point；
2N+1 frequency point being immediately adjacent to each other sequentially is chosen from the candidate frequency point.
5. device according to claim 4, which is characterized in that the frequency offset compensation block includes:
Frequency point chooses module, for choosing the 2N+1 the being immediately adjacent to each other frequency points for meeting preset condition；
Signal receiving module, for carrying out signal reception using the center frequency point in the 2N+1 frequency point as frequency point is received；
Processing module, for carrying out frequency deviation compensation deals to other 2N frequency point in addition to the center frequency point are synchronous.
6. device according to claim 5, which is characterized in that the frequency point chooses module and includes:
Effective frequency point determination unit obtains effective frequency point for being scanned by preset step-length to designated frequency band；It is described effective
The corresponding performance number of frequency point is greater than preset power threshold；
Candidate frequency point determination unit, it is therefrom determining and the signal for synchronizing code correlation for effective frequency point
The corresponding candidate frequency point of communication pattern；
Selection unit, for sequentially choosing 2N+1 frequency point being immediately adjacent to each other from the candidate frequency point.
7. device according to claim 5, which is characterized in that the processing module includes 2N processor,
Each processor, for according to the received signal and a grid corresponding with the communication pattern of the signal
Width carry out frequency deviation compensation calculation.
8. device according to claim 5, which is characterized in that the synchronous code correlation module includes: 2N+1 synchronous code
Correlator, wherein
One synchronous code correlator, for synchronizing a yard relevant calculation, institute to the signal all the way based on the center frequency point
The local synchronization code signal that calculating process is generated according to the received signal and terminal baseband is stated to carry out；Meanwhile
Other 2N synchronous code correlator, for based on the 2N frequency point through frequency deviation compensation deals, described in the road 2N
Signal synchronizes a yard relevant calculation, and the calculating process is according to the reception signal and terminal baseband compensated through overdeviation
The local synchronization code signal of generation carries out.
9. a kind of terminal, which is characterized in that the terminal includes: device described in any one of claim 4-8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366803.3A CN106304272B (en) | 2015-06-26 | 2015-06-26 | A kind of rapid frequency-sweeping method, apparatus and terminal |
| PCT/CN2015/091454 WO2016206231A1 (en) | 2015-06-26 | 2015-10-08 | Quick frequency sweep method and apparatus, terminal, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366803.3A CN106304272B (en) | 2015-06-26 | 2015-06-26 | A kind of rapid frequency-sweeping method, apparatus and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106304272A CN106304272A (en) | 2017-01-04 |
| CN106304272B true CN106304272B (en) | 2019-10-18 |
Family
ID=57584643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510366803.3A Active CN106304272B (en) | 2015-06-26 | 2015-06-26 | A kind of rapid frequency-sweeping method, apparatus and terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106304272B (en) |
| WO (1) | WO2016206231A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108811044B (en) * | 2017-04-28 | 2021-01-26 | 深圳市中兴微电子技术有限公司 | Frequency scanning method and device for small-bandwidth communication system |
| CN110213001B (en) * | 2019-04-26 | 2021-07-27 | 天维讯达（北京）科技有限公司 | Actual frequency point alignment method and device for suspicious signals |
| CN112153722B (en) * | 2020-09-23 | 2023-03-14 | Oppo广东移动通信有限公司 | Frequency point processing method and device, related equipment and storage medium |
| CN115866721B (en) * | 2023-02-03 | 2023-05-16 | 北京智联安科技有限公司 | NBiot chip frequency sweeping method based on frequency point ordering |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731715A (en) * | 2004-08-04 | 2006-02-08 | 中兴通讯股份有限公司 | CDMA system access channel frequency deviation estimating method |
| CN101753492A (en) * | 2008-12-03 | 2010-06-23 | 中兴通讯股份有限公司 | Method and system for correcting frequency offset of mobile communication terminal |
| CN101924577A (en) * | 2010-09-02 | 2010-12-22 | 上海交通大学 | Time slot synchronization method for resisting sampling clock frequency deviation in WCDMA (Wideband Code Division Multiple Access) system |
| CN102546495A (en) * | 2012-01-29 | 2012-07-04 | 中兴通讯股份有限公司 | Method and device for frequency offset compensation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7277457B2 (en) * | 2003-10-03 | 2007-10-02 | Motorola, Inc. | Sync bursts for frequency offset compensation |
| US7444150B2 (en) * | 2003-10-08 | 2008-10-28 | Qualcomm Incorporated | Cell reselection with power scan and parallel decoding |
| CN102651884B (en) * | 2011-02-25 | 2015-07-22 | 中兴通讯股份有限公司 | Frequency-point detection method, device and user equipment |
| CN103987108A (en) * | 2013-02-08 | 2014-08-13 | 意法-爱立信有限公司 | Initial cell search method and apparatus, and mobile terminal |
| US9526105B2 (en) * | 2013-05-13 | 2016-12-20 | Qualcomm Incorporated | Enhanced GSM cell acquisition |
-
2015
- 2015-06-26 CN CN201510366803.3A patent/CN106304272B/en active Active
- 2015-10-08 WO PCT/CN2015/091454 patent/WO2016206231A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731715A (en) * | 2004-08-04 | 2006-02-08 | 中兴通讯股份有限公司 | CDMA system access channel frequency deviation estimating method |
| CN101753492A (en) * | 2008-12-03 | 2010-06-23 | 中兴通讯股份有限公司 | Method and system for correcting frequency offset of mobile communication terminal |
| CN101924577A (en) * | 2010-09-02 | 2010-12-22 | 上海交通大学 | Time slot synchronization method for resisting sampling clock frequency deviation in WCDMA (Wideband Code Division Multiple Access) system |
| CN102546495A (en) * | 2012-01-29 | 2012-07-04 | 中兴通讯股份有限公司 | Method and device for frequency offset compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016206231A1 (en) | 2016-12-29 |
| CN106304272A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106304272B (en) | A kind of rapid frequency-sweeping method, apparatus and terminal | |
| CN104661287B (en) | A kind of parallel multi-channel rapid frequency-sweeping method and system for supporting multimode | |
| CN102026342B (en) | WCDMA (wideband code division multiple access) cell search method and device | |
| CN106470462B (en) | A kind of frequency sweeping method, device and terminal | |
| CN1615667A (en) | Method and mobile station to perform initial cell search in time slotted systems | |
| CN103078660B (en) | Method for reducing capturing time of spreading code in large dynamic range | |
| US8467787B2 (en) | Method and apparatus for searching for modes and frequencies | |
| CN102100049A (en) | Concurrent sync channel searching | |
| CN105472638B (en) | A kind of different-frequency measuring method and device | |
| CN108011653B (en) | Self-adaptive rapid capture tracking system and method | |
| CN103634881A (en) | Frequency point searching method and apparatus, and terminal | |
| CN106941384B (en) | Frequency sweeping method and frequency sweep instrument for Internet of things | |
| CN109660277A (en) | A kind of hybrid spread spectrum information generation device and method | |
| CN103517380B (en) | A kind of searching method of center of housing estate frequency and mobile terminal | |
| CN103209038A (en) | Method, device and system for testing radio-frequency performance of terminals | |
| CN102907150B (en) | For the method and apparatus that the base station cell of improving in LTE down link is synchronous | |
| CN1395762A (en) | Method and device for determining carrier frequency of base stations in mobile receiver of cellular mobile telephone system working with W-CDMA | |
| CN104798403B (en) | The method and apparatus of signal scanning for multimode rake receiver | |
| CN103167585A (en) | Frequency point sequencing method and system in terminal cell search | |
| TWI462539B (en) | Method of frequency adjustment | |
| KR20010031524A (en) | Synchronizing device and synchronizing method | |
| CN103731904A (en) | Method and device for controlling frequency point search and network side device and terminal | |
| CN105792249A (en) | Web search ranking method and system | |
| CN104735771B (en) | A kind of downlink synchronization system and method | |
| CN103096452B (en) | Method and device of acquiring frequency correction burst (FB) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210528 Address after: Room j4-02, block J, Zhongxing Industrial Park, No.10, Tangyan South Road, high tech Zone, Xi'an City, Shaanxi Province, 710065 Patentee after: Xi'an Chris Semiconductor Technology Co.,Ltd. Address before: No.1 Factory building, Dameisha, Yantian District, Shenzhen, Guangdong 518085 Patentee before: Sanechips Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |