CN107294654A - A kind of preamble detecting method and LTE comprehensive test instruments based on LTE comprehensive test instruments - Google Patents
A kind of preamble detecting method and LTE comprehensive test instruments based on LTE comprehensive test instruments Download PDFInfo
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- CN107294654A CN107294654A CN201610229192.2A CN201610229192A CN107294654A CN 107294654 A CN107294654 A CN 107294654A CN 201610229192 A CN201610229192 A CN 201610229192A CN 107294654 A CN107294654 A CN 107294654A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2669—Details of algorithms characterised by the domain of operation
- H04L27/2671—Time domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
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Abstract
The embodiments of the invention provide a kind of preamble detecting method based on LTE comprehensive test instruments and LTE comprehensive test instruments, wherein methods described includes：The LTE upstream datas that LTE comprehensive test instruments receiving terminal is sent, the LTE upstream datas include multiple time-domain signals, and the time-domain signal includes multiple sampled points；The sampled point of pre-set threshold numbers is obtained, and calculates the characteristic value of each sampled point；Position according to where the minimum sampled point of characteristic value, determines the frame header position of the LTE upstream datas.The embodiment of the present invention can not be influenceed by data frequency deviation, compared with the simple mode by power threshold detection frame header position, can obtain more accurately frame header position.
Description
Technical field
The present invention relates to terminal test technical field, more particularly to a kind of preamble detecting method based on LTE comprehensive test instruments
With a kind of LTE comprehensive test instruments.
Background technology
With the fast development of GSM, support that the terminal of multiple types is also developed rapidly, at present eventually
End manufacturer has developed the Related product for supporting the multiple types such as GSM, WCDMA, TD-SCDMA, LTE.Enter in these end products
, it is necessary to carry out uniformity test to it before net, and RF consistency therein test is most basic test therein, is surveyed
Example on probation is also more.
What the terminal to these different systems carried out RF consistency test is usually the test equipment combined, quilt
Referred to as comprehensive test instrument.Current comprehensive test instrument product is calibrated in LTE Fast Frequency Offsets, be required under quick non-signaling measurement item a frame complete
Data can just obtain correct measurement result, and terminal now is in the state for persistently sending out data.This is accomplished by first having to look for
Original position to a frame data is frame head, and frame header position can just obtain complete data after determining, and then obtain correct
Measurement result.But how accurately to determine that frame header position becomes to pass due to there is no uplink synchronous process under non-signaling pattern
It is important.
Existing detection data frame head scheme can have the following two kinds：
(1) data frame header position is judged by power threshold, the program is realized fairly simple, and receiving terminal first obtains one
Known power threshold value, then does real-time power calculation to receiving data again, when continuous N number of point data performance number be above it is pre-
If thresholding when then think first exceed power threshold point be data frame header position.
(2) frame header position is judged by time domain correlation peak location, the program is the further optimization to scheme 1, in side
Correlation computations are done in frequency domain using the pilot frequency sequence for receiving data and one group of local pilot frequency sequence on the basis of case 1, then are passed through
Inverse Fourier transform is transformed into time domain, and finds out peak, is adjusted by the data of reference pair scheme 1 of peak.
Above two scheme can find the frame header position of data well when handling standard signal, but in reality
The signal that terminal is sent in production process is not very regular signal, in this case using above-mentioned scheme will introduce compared with
Big error, so as to cause measurement result inaccurate or complete mistake.Concrete analysis is as follows：
(1) data frame header position is judged by power threshold
This method realizes that simple, speed is fast, but the program has the limitation of itself when using, and needs terminal to send
Data power reaches that this process of its predetermined performance number will be completed in a short period of time, in terms of power spectrum, it should have one
Very precipitous rising edge.If terminal power climbs slowly from scratch, then receiving terminal is judged more than before power threshold
Part valid data are just dropped.The frame header position so obtained is just inaccurate, the effect of exit window before follow-up processing can be caused
Really (preceding exit window refers to that the data that comprehensive test instrument receiving terminal is received are incomplete, and Data Frontend has lost a part of valid data.Example
Such as, preferably receiving signal is：123456789 10, and actually receive be：3 4 5 6 7 8 9 10 11
12, in this case the actual signal received just lost the 1 and 2 of foremost, and have more 11 and 12, such case is known as
Preceding exit window.), influence final measurement result.
(2) frame header position is judged by time domain correlation peak location
The peak that time domain relevant peaks are given tacit consent to when this scheme is used is the original position of this pilot frequency sequence, is passed through
The location indexs of relevant peaks is it is known that the deviation of true original position and existing original position, according to difference to existing starting
Position, which adjusts, obtains accurate frame header position.If but the data that send of terminal when carrying larger frequency deviation this method it is just uncomfortable
With.From Fourier transformation property in itself it is recognised that when data carry frequency deviation, when this frequency deviation value will result in itself
The movement of domain signal correlation peak location, peak in this case has no longer been just the original position of pilot frequency sequence,
It can be made another mistake if being adjusted again with this peak to data.
And this method needs to know that the current subframe numbers for receiving data can just do correlation computations, due to no synchronous mistake
Number of passes is received according to strong hair is strong, the subframe numbers of such receiving terminal also uncertain data, so also blind by frame number before correlation computations
The process of inspection, consumes the substantial amounts of time.
The content of the invention
In view of the above problems, it is proposed that the embodiment of the present invention overcomes above mentioned problem or at least in part to provide one kind
A kind of preamble detecting method based on LTE comprehensive test instruments solved the above problems and a kind of corresponding LTE comprehensive test instruments.
In order to solve the above problems, the embodiment of the invention discloses a kind of preamble detecting method based on LTE comprehensive test instruments, institute
The method of stating includes：
The LTE upstream datas that LTE comprehensive test instruments receiving terminal is sent, the LTE upstream datas include multiple time-domain signals, institute
Stating time-domain signal includes multiple sampled points；
The sampled point of pre-set threshold numbers is obtained, and calculates the characteristic value of each sampled point；
Position according to where the minimum sampled point of characteristic value, determines the frame header position of the LTE upstream datas.
Preferably, the characteristic value is variance；
The step of characteristic value of each sampled point of calculating, includes：
Sub-step S11, sets data-signals of the s (t) as current time corresponding sampled point t, and t initial values are numerical value 0；
Sub-step S12, is calculated according to equation below and k sampled point is offset on the basis of current time corresponding sampled point t
Corresponding data-signal afterwards, the ratio D1 (k) with corresponding data-signal after N+k sampled point of skew：
Wherein, k represents the sampled point quantity offset on the basis of current sampling point t, and N is significant figure in a time-domain signal
According to length；
Sub-step S13, calculates the average value D2 of the D1 (k)；
Sub-step S14, current time corresponding sampled point t variance is calculated according to D1 (k) and D2；；
Sub-step S15, by t=t+1, continues executing with above-mentioned sub-step S12-S14, until t=predetermined threshold values.
Preferably, the sampled point minimum according to characteristic value, the step of determining the frame header position of the LTE upstream datas
Including：
Obtain the original position of the LTE upstream datas；
By the position where the minimum sampled point of the characteristic value, frame header position and institute as the LTE upstream datas
State the deviant of original position；
According to the deviant and the original position, the frame header position of the LTE upstream datas is calculated.
Preferably, methods described also includes：
According to the frame header position, the complete LTE upstream datas of a frame are obtained；
The complete LTE upstream datas are measured, measurement result is obtained.
Preferably, methods described is applied to measurement of the comprehensive test instrument under non-signaling pattern to terminal.
The embodiment of the invention also discloses a kind of LTE comprehensive test instruments, the LTE comprehensive test instruments at least include：
Upstream data receiving module, the LTE upstream datas sent for receiving terminal, the LTE upstream datas include many
Individual time-domain signal, the time-domain signal includes multiple sampled points；
Characteristic value calculating module, for obtaining the sampled point of pre-set threshold numbers, and calculates the characteristic value of each sampled point；
Frame head determining module, for the position according to where the minimum sampled point of characteristic value, determines the LTE upstream datas
Frame header position.
Preferably, the characteristic value is variance；The characteristic value calculating module includes：
Initialization submodule, for setting data-signals of the s (t) as current time corresponding sampled point t, t initial values are
Numerical value 0；
Ratio calculation submodule, k is offset for being calculated according to equation below on the basis of current time corresponding sampled point t
After individual sampled point corresponding data-signal and skew N+k sampled point after corresponding data-signal ratio D1 (k)：
Wherein, k represents the sampled point quantity offset on the basis of current sampling point t, and N is significant figure in a time-domain signal
According to length；
Mean value calculation submodule, the average value D2 for calculating the D1 (k)；
Variance calculating sub module, the variance for calculating current time corresponding sampled point t according to D1 (k) and D2；
Cyclic submodule block, for by t=t+1, continuing to call the ratio calculation submodule, the mean value calculation submodule
Block and the variance calculating sub module, until t=predetermined threshold values.
Preferably, the frame head determining module includes：
Original position acquisition submodule, the original position for obtaining the LTE upstream datas；
Deviant determination sub-module, for by the position where the minimum sampled point of the characteristic value, as on the LTE
The deviant of the frame header position of row data and the original position；
Frame header position calculating sub module, for according to the deviant and the original position, calculating line number on the LTE
According to frame header position.
Preferably, the LTE comprehensive test instruments also include：
Whole frame determining module, for according to the frame header position, obtaining the complete LTE upstream datas of a frame；
Data measurement module, for being measured to the complete LTE upstream datas, obtains measurement result.
Preferably, the comprehensive test instrument applies the measurement to terminal under non-signaling pattern.
The embodiment of the present invention includes advantages below：
In embodiments of the present invention, the LTE time-domain signals sent from terminal are started with itself, utilize the spy of time-domain signal itself
Levy to calculate the characteristic value of each sampled point in predetermined threshold value sampled point, and LTE is detected according to the minimum sampled point of characteristic value
The frame header position of upstream data, the embodiment of the present invention is not influenceed by data frequency deviation, with simple by power threshold detection frame head
The mode of position is compared, and can obtain more accurately frame header position.
Brief description of the drawings
Fig. 1 is a kind of step flow chart of preamble detecting embodiment of the method one based on LTE comprehensive test instruments of the present invention；
Fig. 2 is a kind of step flow chart of preamble detecting embodiment of the method two based on LTE comprehensive test instruments of the present invention；
Fig. 3 is the time-domain signal signal in a kind of preamble detecting embodiment of the method two based on LTE comprehensive test instruments of the present invention
Figure；
Fig. 4 is a kind of structured flowchart of LTE comprehensive test instruments embodiment of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
One of the core concepts of the embodiments of the present invention is that the LTE time-domain signals sent from terminal are started with itself, during utilization
The N of the data head (i.e. cyclic prefix) of domain signalCP,lThe N of individual data and data trailer (i.e. protection interval)CP,lIndividual data are equal
Feature, calculates the variance of each sampled point in predetermined threshold value sampled point, and detect that LTE is up according to the minimum sampled point of variance
The frame header position of data, so as to obtain more accurately frame header position.
The step of reference picture 1, a kind of preamble detecting embodiment of the method one based on LTE comprehensive test instruments for showing the present invention, flows
Cheng Tu, may include steps of：
Step 101, the LTE upstream datas that LTE comprehensive test instruments receiving terminal is sent, when the LTE upstream datas include multiple
Domain signal, the time-domain signal includes multiple sampled points；
Step 102, the sampled point of pre-set threshold numbers is obtained, and calculates the characteristic value of each sampled point；
Step 103, the position according to where the minimum sampled point of characteristic value, determines the frame head position of the LTE upstream datas
Put.
In embodiments of the present invention, the LTE time-domain signals sent from terminal are started with itself, utilize the spy of time-domain signal itself
Levy to calculate the characteristic value of each sampled point in predetermined threshold value sampled point, and the position according to where the minimum sampled point of characteristic value
The frame header position of detection LTE upstream datas is put, the embodiment of the present invention is not influenceed by data frequency deviation, power threshold is leaned on simple
The mode of detection frame header position is compared, and can obtain more accurately frame header position.
The step of reference picture 2, a kind of preamble detecting embodiment of the method two based on LTE comprehensive test instruments for showing the present invention, flows
Cheng Tu.
In the specific implementation, LTE comprehensive test instruments (hereinafter referred to as comprehensive test instrument) are in the calibration of LTE Fast Frequency Offsets, quick non-signaling
It is required for the complete data of a frame just to obtain correct measurement result under measurement item, and terminal now is in and persistently sends out data
State.This is accomplished by the original position i.e. frame head for first having to find a frame data, and frame header position can just have been obtained after determining
A whole frame data, and then obtain correct measurement result.
The embodiment of the present invention can apply to measurement of the comprehensive test instrument to terminal under non-signaling pattern, wherein, non-signaling mould
Formula is corresponding with signaling mode (signaling test mode), and signaling mode is exactly to use comprehensive test instrument anolog base station, and terminal to build
Erect link, comprehensive test instrument sends various signalings, terminal now equivalent to network on connection, should transmission signal, receive to come again
From the various signalings of comprehensive test instrument.Non-signaling pattern refers to that comprehensive test instrument is now solely for the RF index of measuring terminals, does not send out
Go out signaling and remove control terminal, terminal is now only in emission state, and receiving path is usually closing.In a word, for terminal,
Under signaling mode terminal should transmission signal, signal is received again.Terminal is only in emission state under non-signaling pattern.But
Under non-signaling pattern (Non Signaling test mode), comprehensive test instrument does not have uplink synchronous process, and how accurate comprehensive test instrument is
Determine that frame header position becomes most important.
The LTE time-domain signals that the embodiment of the present invention can be sent from terminal are started with itself, utilize the spy of time-domain signal itself
Levy to judge data frame header position.Specifically it may include steps of：
Step 201, the LTE upstream datas that LTE comprehensive test instruments receiving terminal is sent, when the LTE upstream datas include multiple
Domain signal, each time-domain signal includes multiple sampled points；
In end side, LTE upstream datas constantly can be sent out to comprehensive test instrument, when the LTE upstream datas can include multiple
Domain signal.In the specific implementation, a time-domain signal can be understood as an OFDM (Orthogonal Frequency
Division Multiplexing, OFDM) expression of the symbol in time domain, i.e., shared by one OFDM symbol when
It is long, for example, having 7 OFDM symbols in 0.5ms, then the duration of an OFDM symbol is 0.5ms/7=1/14ms.
In the specific implementation, in launch terminal side, carrying out QAM (Quadrature Amplitude to bit stream first
Modulation, quadrature amplitude modulation) or QPSK (Quadrature Phase Shift Keyin, QPSK) tune
System, then in turn through serial to parallel conversion and IFFT (Inverse Fast Fourier Transform, fast Fourier transforma
Change), then parallel data is converted into serial data, protection interval is added, OFDM symbol is formed.
Specifically, due to the influence of multipath effect, OFDM symbol there may be when reaching receiving side by Multipath Transmission
Collision, that is, cause the delay spread of pulse signal, produces ISI (Inter-Symbol Interference, intersymbol interference),
Have a strong impact on the transmission quality of data signal.In order to eliminate intersymbol interference to greatest extent, can each OFDM symbol it
Between insertion protection interval (guard interval, abbreviation GI), and the time span Tg of the protection interval is typically greater than nothing
The maximum delay extension of line channel, the multipath component of such a symbol would not be interfered to next symbol.
But after protection interval is added, due to the influence of multipath transmisstion, interchannel interference (Inter- can be produced
Channel Interference, abbreviation ICI), i.e., the orthogonality between subcarrier is destroyed, and is produced between different subcarriers
Raw interference.The orthogonality between subcarrier is caused to destroy due to multipath transmisstion in order to avoid idle protection interval, OFDM symbol needs
Cyclic prefix signal (cyclic prefix, abbreviation CP) is inserted in its protection interval, will each OFDM symbol afterbody one
Fractional-sample point is copied to before OFDM symbol.
For example, as shown in Fig. 3 OFDM symbol length schematic diagram, an OFDM symbol includes effective data division and CP
Part, the length of valid data is N (being N number of sampled point), and CP contents are to intercept N by the currently active data trailerCP,lIt is individual
Sampled point copies to OFDM symbol and is previously obtained, i.e., one CP length is NCP,l, one addition CP after OFDM symbol length
Spend for N+NCP,l, include N+NCP,lIndividual sampled point.
The OFDM symbol that LTE comprehensive test instruments are sent as receiving terminal receiving terminal.
Step 202, the sampled point of pre-set threshold numbers is obtained, and calculates the variance of each sampled point；
, can be by traveling through in predetermined threshold value sampled point applied to the embodiment of the present invention, the variance of each sampled point
To detect frame header position.
In a kind of preferred embodiment of the embodiment of the present invention, step 202 can include following sub-step：
Sub-step S11, sets data-signals of the s (t) as current time corresponding sampled point t, and t initial values are numerical value 0；
Sub-step S12, is calculated according to equation below and k sampled point is offset on the basis of current time corresponding sampled point t
Corresponding data-signal afterwards, the ratio D1 (k) with corresponding data-signal after N+k sampled point of skew：
Wherein, k represents the sampled point quantity offset on the basis of current sampling point t, and N is significant figure in a time-domain signal
According to length.
It was found from above-mentioned k span, each sampled point t has one group of (NCP,lIt is individual) D1 (k).
In the specific implementation, in due to an OFDM symbol CP signals length NCP,lWith OFDM afterbodys NCP,lIndividual points
It is identical, and the length of valid data is N, then can determine that each sampled point has corresponding sampling in OFDM afterbodys in CP signals
Each phase between sampled point and corresponding sampled point in point (for the ease of description, the referred to hereinafter as point is correspondence sampled point), CP signals
Every N number of sampled point.
It was found from above-mentioned k span, k length of the span no more than a CP, therefore, in above-mentioned formula
(1) in, S (t+k) can be expressed as offseting the CP signals after k sampled point, S (t+N+k) with current time corresponding sampled point t
It can represent with the data-signal of the corresponding sampled point after k sampled point of current time corresponding sampled point t skews.
It should be noted that D1 (k) is inclined with current time corresponding sampled point t in formula (1) except that can be expressed as
The CP signals moved after k sampled point using equivalent correspondence with that beyond the ratio of the data-signal of corresponding sampled point, can also be total to
Yoke, which is multiplied to calculate, to be represented, for example, D1 (k)=S (t+k) * S (t+N+k), the embodiment of the present invention is not construed as limiting to this.
Sub-step S13, calculates the average value D2 of the D1 (k)；
In the specific implementation, calculating N respectivelyCP,lAfter individual D1 (k), formula (2) further calculating can be further used
The NCP,lThe average value D2 of individual D1 (k).
Sub-step S14, current time corresponding sampled point t variance is calculated according to D1 (k) and D2；
In the specific implementation, obtaining NCP,lAfter the average value D2 of individual D1 (k), formula (3) basis can be further used
D1 (k) sampled point ts corresponding with D2 calculating current times variance D3 (t).
Sub-step S15, by t=t+1, continues executing with above-mentioned sub-step S12-S14, until t=predetermined threshold values.
Current time corresponding sampled point t variance is calculated after completion, and one can will be moved after sampled point t, is acquired
The sampled point t+1 of subsequent time, continues executing with above-mentioned sub-step S12- sub-step S14, terminates the above when t=predetermined threshold values and follows
Ring process, is obtained since current time corresponding sampled point t, in predetermined threshold value sampled point, the variance of each sampled point.
In practice, due to length of the skew not over an ofdm signal valid data of a data frame head, because
This, t value predetermined threshold value not over ofdm signal valid data length, i.e. t=N when can terminate above-mentioned circulation
Process.
As a kind of preferred exemplary, N can be using value as 2048.
Step 203, the position according to where the minimum sampled point of variance, determines the frame header position of the LTE upstream datas.
Obtain in predetermined threshold value sampled point after the variance of each sampled point, can further obtain that variance is minimum to adopt
Sampling point, determines the position t_min where the sampled point, and according to t_min, determine the frame header position of LTE upstream datas.
In a kind of preferred embodiment of the embodiment of the present invention, step 203 can include following sub-step：
Sub-step S21, obtains the original position of the LTE upstream datas；
In practice, the position of first data received can as LTE upstream datas original position.
Sub-step S22, by the position where the minimum sampled point of the variance, is used as the frame head of the LTE upstream datas
Position and the deviant of the original position；
Specifically, can using t_min as the real frame header position of data and the original position of LTE upstream datas skew
Value.
Sub-step S23, according to the deviant and the original position, calculates the frame header position of the LTE upstream datas.
In the specific implementation, original position+offset of frame header position=LTE upstream datas, when obtaining LTE upstream datas
Original position and offset after, the frame header position of LTE upstream datas can be obtained, if for example, LTE upstream datas rise
Beginning, position was t=0, then the frame header position of LTE upstream datas is the corresponding data-signal S (t_min) of t_min.
In embodiments of the present invention, if the time-domain signal is the frame head of upstream data, D1 (k) should be one group constant
Value, it is fluctuated should be minimum, that is, variance is minimum.Therefore it is corresponding using the minimum sampled point of variance in the embodiment of the present invention
Position represents real data frame head position.
The embodiment of the present invention detects the frame header position of LTE upstream datas using the variance of sampled point, detection process not by
The influence of data frequency deviation, more accurately frame header position is obtained than the simple mode by power threshold detection frame head.Obtaining frame
After head position, the complete LTE upstream datas of a frame can be obtained according to the frame header position, when line number on the LTE complete to this
During according to measuring, more accurately measurement result can be obtained.
It should be noted that for embodiment of the method, in order to be briefly described, therefore it to be all expressed as to a series of action group
Close, but those skilled in the art should know, the embodiment of the present invention is not limited by described sequence of movement, because according to
According to the embodiment of the present invention, some steps can be carried out sequentially or simultaneously using other.Secondly, those skilled in the art also should
Know, embodiment described in this description belongs to preferred embodiment, the involved action not necessarily present invention is implemented
Necessary to example.
Reference picture 4, shows a kind of structured flowchart of LTE comprehensive test instruments embodiment of the present invention, the LTE comprehensive test instruments are at least
Following module can be included：
Upstream data receiving module 401, the LTE upstream datas sent for receiving terminal, the LTE upstream datas include
Multiple time-domain signals, the time-domain signal includes multiple sampled points；
Characteristic value calculating module 402, for obtaining the sampled point of pre-set threshold numbers, and calculates the feature of each sampled point
Value；
Frame head determining module 403, for the position according to where the minimum sampled point of characteristic value, determines that the LTE is up
The frame header position of data.
In a kind of preferred embodiment of the embodiment of the present invention, the characteristic value is variance；The characteristic value calculating module
402 can include following submodule：
Initialization submodule, for setting data-signals of the s (t) as current time corresponding sampled point t, t initial values are
Numerical value 0；
Ratio calculation submodule, k is offset for being calculated according to equation below on the basis of current time corresponding sampled point t
After individual sampled point corresponding data-signal and skew N+k sampled point after corresponding data-signal ratio D1 (k)：
Wherein, k represents the sampled point quantity offset on the basis of current sampling point t, and N is significant figure in a time-domain signal
According to length；
Mean value calculation submodule, the average value D2 for calculating the D1 (k)；
Variance calculating sub module, the variance for calculating current time corresponding sampled point t according to D1 (k) and D2；
Cyclic submodule block, for by t=t+1, continuing to call the ratio calculation submodule, the mean value calculation submodule
Block and the variance calculating sub module, until t=predetermined threshold values.
In a kind of preferred embodiment of the embodiment of the present invention, the frame head determining module 403 can include following submodule
Block：
Original position acquisition submodule, the original position for obtaining the LTE upstream datas；
Deviant determination sub-module, for by the position where the minimum sampled point of the characteristic value, as on the LTE
The deviant of the frame header position of row data and the original position；
Frame header position calculating sub module, for according to the deviant and the original position, calculating line number on the LTE
According to frame header position.
In a kind of preferred embodiment of the embodiment of the present invention, the LTE comprehensive test instruments can also include following module：
Whole frame determining module, for according to the frame header position, obtaining the complete LTE upstream datas of a frame；
Data measurement module, for being measured to the complete LTE upstream datas, obtains measurement result.
In a kind of preferred embodiment of the embodiment of the present invention, the comprehensive test instrument is applied under non-signaling pattern to terminal
Measurement.
For LTE comprehensive test instrument embodiments, because it is substantially similar to embodiment of the method, so the comparison of description is simple
Single, the relevent part can refer to the partial explaination of embodiments of method.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
Between the difference of other embodiment, each embodiment identical similar part mutually referring to.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can be provided as method, device or calculate
Machine program product.Therefore, the embodiment of the present invention can using complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can use it is one or more wherein include computer can
With in the computer-usable storage medium (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention is with reference to method according to embodiments of the present invention, terminal device (system) and computer program
The flow chart and/or block diagram of product is described.It should be understood that can be by computer program instructions implementation process figure and/or block diagram
In each flow and/or square frame and the flow in flow chart and/or block diagram and/or the combination of square frame.These can be provided
Computer program instructions are set to all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to produce a machine so that held by the processor of computer or other programmable data processing terminal equipments
Capable instruction is produced for realizing in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames
The device for the function of specifying.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing terminal equipments
In the computer-readable memory worked in a specific way so that the instruction being stored in the computer-readable memory produces bag
The manufacture of command device is included, the command device is realized in one flow of flow chart or multiple flows and/or one side of block diagram
The function of being specified in frame or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing terminal equipments so that
Series of operation steps is performed on computer or other programmable terminal equipments to produce computer implemented processing, so that
The instruction performed on computer or other programmable terminal equipments is provided for realizing in one flow of flow chart or multiple flows
And/or specified in one square frame of block diagram or multiple square frames function the step of.
Although having been described for the preferred embodiment of the embodiment of the present invention, those skilled in the art once know base
This creative concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to
Including preferred embodiment and fall into having altered and changing for range of embodiment of the invention.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or terminal device including a series of key elements are not only wrapped
Those key elements, but also other key elements including being not expressly set out are included, or also include being this process, method, article
Or the intrinsic key element of terminal device.In the absence of more restrictions, by wanting that sentence "including a ..." is limited
Element, it is not excluded that also there is other identical element in the process including the key element, method, article or terminal device.
Above to a kind of preamble detecting method and LTE comprehensive test instruments based on LTE comprehensive test instruments provided by the present invention, carry out
It is discussed in detail, specific case has been serviced herein the principle and embodiment of the present invention are set forth, above example
Illustrate the method and its core concept for being only intended to help to understand the present invention；Simultaneously for those of ordinary skill in the art, according to
According to the thought of the present invention, it will change in embodiment and service range, in summary, this specification content
It should not be construed as limiting the invention.
Claims (10)
1. a kind of preamble detecting method based on LTE comprehensive test instruments, it is characterised in that methods described includes：
The LTE upstream datas that LTE comprehensive test instruments receiving terminal is sent, the LTE upstream datas include multiple time-domain signals, when described
Domain signal includes multiple sampled points；
The sampled point of pre-set threshold numbers is obtained, and calculates the characteristic value of each sampled point；
Position according to where the minimum sampled point of characteristic value, determines the frame header position of the LTE upstream datas.
2. according to the method described in claim 1, it is characterised in that the characteristic value is variance；
The step of characteristic value of each sampled point of calculating, includes：
Sub-step S11, sets data-signals of the s (t) as current time corresponding sampled point t, and t initial values are numerical value 0；
Sub-step S12, it is right after k sampled point to be offset according to equation below calculating on the basis of current time corresponding sampled point t
The data-signal answered, the ratio D1 (k) with corresponding data-signal after N+k sampled point of skew：
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<mn>1</mn>
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<mo>=</mo>
<mfrac>
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<mrow>
<mo>(</mo>
<mi>t</mi>
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<mi>k</mi>
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<mi>s</mi>
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<mi>t</mi>
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<mi>N</mi>
<mo>+</mo>
<mi>k</mi>
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</mrow>
</mrow>
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<mo>,</mo>
<mi>k</mi>
<mo>=</mo>
<mn>0</mn>
<mo>,</mo>
<mn>1</mn>
<mo>,</mo>
<mn>2</mn>
<mo>,</mo>
<mn>3</mn>
<mo>,</mo>
<mn>......</mn>
<msub>
<mi>N</mi>
<mrow>
<mi>C</mi>
<mi>P</mi>
<mo>,</mo>
<mn>1</mn>
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<mo>-</mo>
<mn>1</mn>
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Wherein, k represents the sampled point quantity offset on the basis of current sampling point t, and N is valid data in a time-domain signal
Length；
Sub-step S13, calculates the average value D2 of the D1 (k)；
Sub-step S14, current time corresponding sampled point t variance is calculated according to D1 (k) and D2；；
Sub-step S15, by t=t+1, continues executing with above-mentioned sub-step S12-S14, until t=predetermined threshold values.
3. method according to claim 2, its feature is being, the sampled point minimum according to characteristic value, institute is determined
The step of frame header position for stating LTE upstream datas, includes：
Obtain the original position of the LTE upstream datas；
By the position where the minimum sampled point of the characteristic value, the frame header position of the LTE upstream datas and described are used as
Beginning position deviant；
According to the deviant and the original position, the frame header position of the LTE upstream datas is calculated.
4. the method according to claim any one of 1-3, it is characterised in that also include：
According to the frame header position, the complete LTE upstream datas of a frame are obtained；
The complete LTE upstream datas are measured, measurement result is obtained.
5. the method according to claim any one of 1-3, it is characterised in that methods described is applied to comprehensive test instrument in non-signaling
To the measurement of terminal under pattern.
6. a kind of LTE comprehensive test instruments, it is characterised in that the LTE comprehensive test instruments at least include：
Upstream data receiving module, the LTE upstream datas sent for receiving terminal, when the LTE upstream datas include multiple
Domain signal, the time-domain signal includes multiple sampled points；
Characteristic value calculating module, for obtaining the sampled point of pre-set threshold numbers, and calculates the characteristic value of each sampled point；
Frame head determining module, for the position according to where the minimum sampled point of characteristic value, determines the frame of the LTE upstream datas
Head position.
7. LTE comprehensive test instruments according to claim 6, it is characterised in that the characteristic value is variance；The characteristic value is calculated
Module includes：
Initialization submodule, for setting data-signals of the s (t) as current time corresponding sampled point t, t initial values are numerical value
0；
Ratio calculation submodule, is adopted for calculating skew k on the basis of current time corresponding sampled point t according to equation below
After sampling point corresponding data-signal and skew N+k sampled point after corresponding data-signal ratio D1 (k)：
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<mn>1</mn>
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<mo>(</mo>
<mi>k</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfrac>
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<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>+</mo>
<mi>k</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>s</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>+</mo>
<mi>N</mi>
<mo>+</mo>
<mi>k</mi>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>,</mo>
<mi>k</mi>
<mo>=</mo>
<mn>0</mn>
<mo>,</mo>
<mn>1</mn>
<mo>,</mo>
<mn>2</mn>
<mo>,</mo>
<mn>3</mn>
<mo>,</mo>
<mn>......</mn>
<msub>
<mi>N</mi>
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<mi>C</mi>
<mi>P</mi>
<mo>,</mo>
<mn>1</mn>
</mrow>
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<mo>;</mo>
</mrow>
Wherein, k represents the sampled point quantity offset on the basis of current sampling point t, and N is valid data in a time-domain signal
Length；
Mean value calculation submodule, the average value D2 for calculating the D1 (k)；
Variance calculating sub module, the variance for calculating current time corresponding sampled point t according to D1 (k) and D2；
Cyclic submodule block, for by t=t+1, continue to call the ratio calculation submodule, the mean value calculation submodule with
And the variance calculating sub module, until t=predetermined threshold values.
8. LTE comprehensive test instruments according to claim 7, its feature is being, the frame head determining module includes：
Original position acquisition submodule, the original position for obtaining the LTE upstream datas；
Deviant determination sub-module, for by the position where the minimum sampled point of the characteristic value, being used as line number on the LTE
According to frame header position and the original position deviant；
Frame header position calculating sub module, for according to the deviant and the original position, calculating the LTE upstream datas
Frame header position.
9. the LTE comprehensive test instruments according to claim any one of 6-8, it is characterised in that also include：
Whole frame determining module, for according to the frame header position, obtaining the complete LTE upstream datas of a frame；
Data measurement module, for being measured to the complete LTE upstream datas, obtains measurement result.
10. the LTE comprehensive test instruments according to claim any one of 6-8, it is characterised in that the comprehensive test instrument is applied in non-signaling
To the measurement of terminal under pattern.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112105078A (en) * | 2019-06-18 | 2020-12-18 | 大唐联仪科技有限公司 | Data synchronization processing method and device for terminal signals |
| CN114362839A (en) * | 2021-12-07 | 2022-04-15 | 北京四季豆信息技术有限公司 | Signal detection method and device based on HPLC dual-mode wireless system and electronic equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060170820A1 (en) * | 2005-02-01 | 2006-08-03 | Mediatek Incorporation | Synchronization methods and systems for audio frame decoder |
| CN101001232A (en) * | 2006-01-09 | 2007-07-18 | 华为技术有限公司 | Sending method and system for synchronous signal |
| CN101242259A (en) * | 2007-02-06 | 2008-08-13 | 上海睿智通无线技术有限公司 | Frame synchronization detection method and device for OFDM system |
| CN102469057A (en) * | 2010-11-11 | 2012-05-23 | 上海明波通信技术有限公司 | Frame synchronization method and device applicable to burst communication system |
| CN102742239A (en) * | 2011-12-01 | 2012-10-17 | 华为技术有限公司 | Method and apparatus for frame synchronization in optical fiber system |
| CN102752258A (en) * | 2012-07-06 | 2012-10-24 | 北京理工大学 | Secondary peak restraining algorithm for external radiation source radar system of multi-carrier digital TV set |
| CN103023853A (en) * | 2012-12-26 | 2013-04-03 | 东南大学 | Orthogonal frequency division multiplexing received frame synchronizing method for co-training sequence mutual-correlation information |
| CN104811974A (en) * | 2015-03-23 | 2015-07-29 | 东南大学 | Data processing method of WiFi integrated tester based on IEEE802.11n standard |
| CN106850481A (en) * | 2015-12-04 | 2017-06-13 | 大唐移动通信设备有限公司 | The method and searcher of a kind of frame header position search |
-
2016
- 2016-04-13 CN CN201610229192.2A patent/CN107294654B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060170820A1 (en) * | 2005-02-01 | 2006-08-03 | Mediatek Incorporation | Synchronization methods and systems for audio frame decoder |
| CN101001232A (en) * | 2006-01-09 | 2007-07-18 | 华为技术有限公司 | Sending method and system for synchronous signal |
| CN101242259A (en) * | 2007-02-06 | 2008-08-13 | 上海睿智通无线技术有限公司 | Frame synchronization detection method and device for OFDM system |
| CN102469057A (en) * | 2010-11-11 | 2012-05-23 | 上海明波通信技术有限公司 | Frame synchronization method and device applicable to burst communication system |
| CN102742239A (en) * | 2011-12-01 | 2012-10-17 | 华为技术有限公司 | Method and apparatus for frame synchronization in optical fiber system |
| CN102752258A (en) * | 2012-07-06 | 2012-10-24 | 北京理工大学 | Secondary peak restraining algorithm for external radiation source radar system of multi-carrier digital TV set |
| CN103023853A (en) * | 2012-12-26 | 2013-04-03 | 东南大学 | Orthogonal frequency division multiplexing received frame synchronizing method for co-training sequence mutual-correlation information |
| CN104811974A (en) * | 2015-03-23 | 2015-07-29 | 东南大学 | Data processing method of WiFi integrated tester based on IEEE802.11n standard |
| CN106850481A (en) * | 2015-12-04 | 2017-06-13 | 大唐移动通信设备有限公司 | The method and searcher of a kind of frame header position search |
Non-Patent Citations (1)
| Title |
|---|
| 彭力: "《嵌入式物联网技术应用》", 30 January 2015 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112105078A (en) * | 2019-06-18 | 2020-12-18 | 大唐联仪科技有限公司 | Data synchronization processing method and device for terminal signals |
| CN112105078B (en) * | 2019-06-18 | 2023-05-02 | 大唐联仪科技有限公司 | Data synchronization processing method and device for terminal signals |
| CN114362839A (en) * | 2021-12-07 | 2022-04-15 | 北京四季豆信息技术有限公司 | Signal detection method and device based on HPLC dual-mode wireless system and electronic equipment |
| CN114362839B (en) * | 2021-12-07 | 2024-05-03 | 芯象半导体科技(北京)有限公司 | Signal detection method and device based on HPLC dual-mode wireless system and electronic equipment |
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