CN104618288B - The symbol timing synchronization method and device of a kind of radio communication detecting system - Google Patents
The symbol timing synchronization method and device of a kind of radio communication detecting system Download PDFInfo
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Abstract
The invention discloses the symbol timing synchronization method and device of a kind of radio communication detecting system.Wherein this method includes：According to the required precision of Vector Signal Analysis, filter factor is obtained；According to the mean power of sampled point in intermediate frequency i/q signal symbol period, the first synchronization parameter is obtained；Demodulating data is obtained by using the first synchronization parameter to be calculated, and obtains the second synchronization parameter；Wherein, the second synchronization parameter is higher than the accuracy of the first synchronization parameter；Based on filter factor, the first synchronization parameter, the second synchronization parameter, and the intermediate frequency i/q signal of input, sign synchronization data are calculated.By the present invention, solve the problems, such as that the operand of symbol timing synchronization method in correlation technique is larger, meet the demand of radio communication detecting system and electronic measuring instrument；Using the measurement parameter that obtains after known arrange parameter in Vector Signal Analysis and measurement, the complexity of synchronous algorithm for estimating is reduced, using two-stage sign synchronization, improves the synchronization accuracy of Digital Implementation.
Description
Technical field
The present invention relates to the communications field, more particularly to the symbol timing synchronization method and dress of a kind of radio communication detecting system
Put.
Background technology
Modern wireless communications networks use Digital Modulation Techniques, effectively overcome wireless channel bring it is various unfavorable
Influence, and improve frequency spectrum resource utilization rate, it has also become the citation form of modern radio-frequency/microwave communication, has driven novel test
The research of technology.Vector Signal Analysis Technique is one of crucial measuring technology of wireless communication test, have it is accurate, intuitively modulate
Parameter measurement ability, is widely used in Vector Signal Analyzer device and wireless communication measuring system.
Sign synchronization (or Timed Recovery) is one of most critical technology in Vector Signal Analysis Technique, realizes character rate week
The concise sampling of phase property.Also to meet the character rate cycle for radio communication detecting system is any variable within the specific limits
Requirement.Common implementation method includes maximum likelihood timing estimation, not face judgement timing estimation and early-slow door synchronizer
Deng.They are to use blind or semi-blind estimation method, and the reality combined using digital-to-analogues such as VCO, integrating circuit and digital summation modules
Existing mode, there are of high cost, volume it is big and not easy of integration the shortcomings of.Therefore, the method for full digital starting starts to be studied, as symbol
The symbol timing synchronization method etc. of number synchronous method, wireless communication system, is carried out related calculation, power detection, channel using training sequence
The modes such as estimation realize that synchronization accuracy is related with sample rate, in order to obtain high accuracy, it is necessary to increase sample rate, so bring
Operand is significantly increased.
For symbol timing synchronization method in correlation technique operand it is larger the problem of, not yet propose effective solution party at present
Case.
The content of the invention
For symbol timing synchronization method in correlation technique operand it is larger the problem of, the present invention provides a kind of wireless communication
The symbol timing synchronization method and device of test system, to solve above-mentioned technical problem.
According to an aspect of the present invention, the present invention provides a kind of symbol timing synchronization method of radio communication detecting system,
Wherein, this method includes：According to the required precision of Vector Signal Analysis, filter factor is obtained；According to intermediate frequency i/q signal symbol week
The mean power of sampled point in phase, obtains the first synchronization parameter；By using first synchronization parameter obtain demodulating data into
Row calculates, and obtains the second synchronization parameter；Wherein, second synchronization parameter is higher than the accuracy of first synchronization parameter；Base
In the filter factor, first synchronization parameter, second synchronization parameter, and the intermediate frequency i/q signal of input, calculate
To sign synchronization data.
Preferably, according to the mean power of sampled point in intermediate frequency i/q signal symbol period, the first synchronization parameter is obtained, is wrapped
Include：According to the mean power of sampled point in intermediate frequency i/q signal symbol period, estimation obtains sign synchronization position；Based on the symbol
Number sync bit, obtains the first synchronization parameter；
Preferably, obtain demodulating data by using first synchronization parameter to be calculated, obtain the second synchronization parameter,
Including：By being demodulated to the synchrodata of first synchronization parameter, measurement data and reference data are obtained；According to described
The estimation of the time domain specification of measurement data and reference data, accurate sign synchronization moment；Based on the sign synchronization moment, is obtained
Two synchronization parameters.
The filter factor, first synchronization parameter, second synchronization parameter are preferably based on, and input
Intermediate frequency i/q signal, is calculated sign synchronization data, including：According to first synchronization parameter, second synchronization parameter,
Determine the optimum sampling moment；The intermediate frequency i/q signal is recovered according to the filtering parameter, obtains original signal；According to
The optimum sampling moment carries out resampling to the original signal, obtains optimum sampling point data, i.e., described sign synchronization
Data.
According to another aspect of the present invention, present invention also offers a kind of sign synchronization dress of radio communication detecting system
Put, wherein, which includes：Variable Rate filter parameter designs module, for the required precision according to Vector Signal Analysis, obtains
To filter factor；Preliminary symbol synchronization module, for the mean power according to sampled point in intermediate frequency i/q signal symbol period, obtains
To the first synchronization parameter；Accurate sign synchronization module, carries out for obtaining demodulating data by using first synchronization parameter
Calculate, obtain the second synchronization parameter；Wherein, second synchronization parameter is higher than the accuracy of first synchronization parameter；Speed change
Rate/synchronization combining realizes module, for based on the filter factor, first synchronization parameter, second synchronization parameter, with
And the intermediate frequency i/q signal of input, sign synchronization data are calculated.
Preferably, the preliminary symbol synchronization module, is additionally operable to：According to sampled point in intermediate frequency i/q signal symbol period
Mean power, estimation obtain sign synchronization position；Based on the sign synchronization position, the first synchronization parameter is obtained；
Preferably, the accurate sign synchronization module, is additionally operable to：By the synchrodata to first synchronization parameter into
Row demodulation, obtains measurement data and reference data；Estimated according to the time domain specification of the measurement data and reference data, accurate symbol
Number synchronization point；Based on the sign synchronization moment, the second synchronization parameter is obtained.
Preferably, the variable Rate/synchronization combining realizes module, is additionally operable to：According to first synchronization parameter, described
Two synchronization parameters, determine the optimum sampling moment；The intermediate frequency i/q signal is recovered according to the filtering parameter, is obtained former
Beginning signal；Resampling is carried out to the original signal according to the optimum sampling moment, obtains optimum sampling point data, i.e. institute
State sign synchronization data.
The present invention has the beneficial effect that：
By technical scheme, solve the problems, such as that the operand of symbol timing synchronization method in correlation technique is larger,
Meet the demand of radio communication detecting system and electronic measuring instrument；Take full advantage of known setting in Vector Signal Analysis
The measurement parameter obtained after parameter and measurement, greatly reduces the complexity of synchronous algorithm for estimating, using two-stage sign synchronization, carries
The synchronization accuracy of high Digital Implementation, accurate sign synchronization have very wide frequency bandwidth characteristics, and use using being Time Domain Analysis
Variable timing mechanism, reduces the data dithering of synchronous belt, algorithm is realized using variable Rate and synchronization combining, effectively reduces and realizes
Difficulty, full digital starting is carried out by software and radio technique, easy to integrated and transplanting, is widely used in Vector Signal Analysis
In instrument and wireless communication measuring system.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow above and other objects of the present invention, feature and advantage can
Become apparent, below especially exemplified by the embodiment of the present invention.
Brief description of the drawings
Fig. 1 is the symbol timing synchronization method flow chart of according to embodiments of the present invention one radio communication detecting system；
Fig. 2 is the structure diagram of the sign synchronization device of according to embodiments of the present invention two radio communication detecting system；
Fig. 3 is the operating process schematic diagram of according to embodiments of the present invention three sign synchronization device；
Fig. 4 is according to embodiments of the present invention three filter factor schematic diagram；
Fig. 5 is the power schematic diagram of according to embodiments of the present invention three QPSK；
Fig. 6 is according to embodiments of the present invention three optimum sampling moment schematic diagram.
Embodiment
In order to solve the problems, such as that the operand of symbol timing synchronization method in the prior art is larger, the present invention provides a kind of wireless
The symbol timing synchronization method and device of communication test system, below in conjunction with attached drawing and embodiment, carry out the present invention further detailed
Describe in detail bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, the present invention is not limited.
Embodiment one
Shown in Fig. 1 is the symbol timing synchronization method flow chart of radio communication detecting system, as shown in Figure 1, including：
Step S102, according to the required precision of Vector Signal Analysis, obtains filter factor.
Step S104, according to the mean power of sampled point in intermediate frequency i/q signal symbol period, obtains the first synchronization parameter.
Detailed process is：According to the mean power of sampled point in above-mentioned intermediate frequency i/q signal symbol period, estimation obtains symbol
Sync bit；Based on above-mentioned sign synchronization position, the first synchronization parameter is obtained；
Step S106, obtains demodulating data by using the first synchronization parameter and is calculated, obtain the second synchronization parameter；Its
In, above-mentioned second synchronization parameter is higher than the accuracy of above-mentioned first synchronization parameter.
Detailed process is：Be demodulated by using the synchrodata of above-mentioned first synchronization parameter, obtain measurement data and
Reference data；Estimated according to the time domain specification of above-mentioned measurement data and reference data, the accurate sign synchronization moment；Based on above-mentioned symbol
Number synchronization point, obtains the second synchronization parameter.
Step S108, based on above-mentioned filter factor, above-mentioned first synchronization parameter, above-mentioned second synchronization parameter, and input
Intermediate frequency i/q signal, sign synchronization data are calculated.
Detailed process is：According to above-mentioned first synchronization parameter, above-mentioned second synchronization parameter, the optimum sampling moment is determined；Root
Above-mentioned intermediate frequency i/q signal is recovered according to above-mentioned filtering parameter, obtains original signal；According to the above-mentioned optimum sampling moment to upper
State original signal and carry out resampling, obtain optimum sampling point data, i.e., above-mentioned sign synchronization data.
The above method can realize on FPGA, available in portable Vector Signal Analyzer or test system, at the same time
It may migrate in existing Vector Signal Analyzer or test system, under conditions of hardware cost and hardware structure is not increased,
Improve sign synchronization precision.
Embodiment two
Shown in Fig. 2 is the structure diagram of the sign synchronization device of radio communication detecting system, as shown in Fig. 2, including：
Variable Rate filter parameter designs module 10, is connected to variable Rate/synchronization combining and realizes module 40, for according to arrow
The required precision of signal analysis is measured, obtains filter factor.
Preliminary symbol synchronization module 20, is connected to variable Rate/synchronization combining and realizes module 40, for being believed according to intermediate frequency I/Q
The mean power of sampled point, obtains the first synchronization parameter in number symbol period.
Specifically it is additionally operable to：According to the mean power of sampled point in intermediate frequency i/q signal symbol period, estimation obtains sign synchronization
Position；Based on above-mentioned sign synchronization position, the first synchronization parameter is obtained.
Accurate sign synchronization module 30, is connected to variable Rate/synchronization combining and realizes module 40, for by using above-mentioned the
One synchronous gain of parameter demodulating data is calculated, and obtains the second synchronization parameter；Wherein, above-mentioned second synchronization parameter is than above-mentioned
The accuracy of one synchronization parameter is high.
Specifically it is additionally operable to：By being demodulated to the synchrodata of above-mentioned first synchronization parameter, measurement data and ginseng are obtained
Examine data；Estimated according to the time domain specification of above-mentioned measurement data and reference data, the accurate sign synchronization moment；Based on above-mentioned symbol
Synchronization point, obtains the second synchronization parameter.
Variable Rate/synchronization combining realizes module 40, for based on above-mentioned filter factor, above-mentioned first synchronization parameter, above-mentioned
Second synchronization parameter, and the intermediate frequency i/q signal of input, are calculated sign synchronization data.
Specifically it is additionally operable to：According to above-mentioned first synchronization parameter, above-mentioned second synchronization parameter, the optimum sampling moment is determined；Root
Above-mentioned intermediate frequency i/q signal is recovered according to above-mentioned filtering parameter, obtains original signal；According to the above-mentioned optimum sampling moment to upper
State original signal and carry out resampling, obtain optimum sampling point data, i.e., above-mentioned sign synchronization data.
Above device can be arranged on FPGA and realize, available in portable Vector Signal Analyzer or test system,
It may migrate at the same time in existing Vector Signal Analyzer or test system, do not increasing the condition of hardware cost and hardware structure
Under, improve sign synchronization precision.
With reference to preferred embodiments and drawings, the operating process of above-mentioned sign synchronization device is introduced.
Embodiment three
Shown in Fig. 3 is the operating process schematic diagram of sign synchronization device, as shown in figure 3, sign synchronization device includes 4
Module：Variable Rate filter parameter design module, preliminary symbol synchronization module, accurate sign synchronization module and variable Rate/synchronization
Combine and realize module.Wherein,
Variable Rate filter parameter design module design filter factor, exports and realizes module to variable Rate/synchronization combining；
Preliminary symbol synchronization module estimates sign synchronization rough location, is obtained based on sign synchronization rough location preliminary same
Parameter (i.e. above-mentioned first synchronization parameter) is walked, exports and realizes module to variable Rate/synchronization combining；
Accurate sign synchronization module estimates the accurate sign synchronization moment, and precise synchronization is obtained based on the accurate sign synchronization moment
Parameter (i.e. above-mentioned second synchronization parameter), exports and realizes module to variable Rate/synchronization combining；
Variable Rate/synchronization combining realizes that module realizes speed change using intermediate frequency I/Q data, filtering parameter and synchronization parameter is inputted
Rate and sign synchronization, export optimum sampling point data.
The specific implementation step to modules is described in detail below.
1), it is necessary to be initialized before test system or test equipment start measurement, the parameter for completing vector signal is set
Put, and correct intermediate frequency I/Q data x (nTs1)=I (nTs1)+j*Q(nTs1) input, wherein Ts1For the sampling period.
2) according to trailing length N1 in vector signal parameter and per symbol points N 2, variable Rate filter parameter design module
Produce filtering parameter.
Analyzed from the angle of frequency domain, intermediate frequency I/Q data x (nTs1) frequency spectrum XS(w) it is the frequency spectrum of original signal with fsFor
Cycle carries out continuation, works as fs≥2fHWhen, periodic spectral does not have aliasing.Because fHExact value it is often unknown, here
Set the cutoff frequency of ideal low-pass filter asThe expression formula of its impulse response is
As can be seen that h (t) has a peak value 1 in t=0, and zero crossing is in 1/fsNon-zero integer multiples on, and h
(t) length is infinite.
Due to the hangover although infinite length of Sa functions, but the very little of amplitude below, it can be ignored, in actual reality
During existing, in order to reduce operand, it is necessary to be truncated to Sa functions.In order to reduce truncate after to the shadow of data processing precision
Ring, carry out windowed function processing.In filter factor schematic diagram shown in Fig. 4, display is exactly the filter coefficient finally obtained.
3) in first processing, initial synchronization parameters are unknown, are initialized as 0.Variable Rate/synchronization combining realizes module
Variable Rate simple function is completed at this time.The data of output are x0(nTs1), Ts2 is the integral multiple of chip rate.
Variable Rate/synchronization combining is realized in the rate algorithm of module variable Rate below/synchronization combining algorithm specifically
It is bright, just repeat no more here.
4) data exported for the first time are x0(nTs1), by preliminary synchronisation, export preliminary synchronisation parameter.
Preliminary synchronisation algorithm uses common power synchronous algorithm, it is necessary to carry out eliminating ISI filtering to data, recycles code
Member point power energy is more concentrated than having the characteristics that the data point of ISI, is completed preliminary symbol synchronization, is concretely comprised the following steps：
A) ISI wave filters are designed, for eliminating ISI, if initial data is exactly not have ISI data, this step can be skipped
Suddenly.
B) it is to count per symbol sample data to be once divided into M roads to carry out calculating power P 1...PM, M, and Fig. 5 is shown
The power schematic diagram (M=4) of QPSK.
C) mean square deviation per road power is calculated respectively, is compared, output synchronizing symbol position.It is noted here that it is pair
In QAM, the symbol point of different amplitude positions occurs the phenomenon of saltus step, it is necessary to algorithm process.
5) after preliminary synchronisation gain of parameter, precise synchronization parameter is unknown, is initialized as 0.Variable Rate/synchronization combining is real
Existing module completes variable Rate and preliminary synchronisation function at this time.The data of output are x1(nTs2)。
Variable Rate/synchronization combining realizes that the variable Rate of module and preliminary synchronisation algorithm variable Rate below/synchronization combining are calculated
Describe in detail in method, just repeat no more here.
6) the preliminary synchronisation parameter of output is x1(nTs2), obtain reference data ref (nT by subsequent demodulation algorithms3) and
Measurement data meas (nTs3), obtain precise synchronization parameter into accurate sign synchronization module.
Reference data ref (nTs3) it is reduction transmitting signal, it is optimum sampling point per first point of symbol, per symbol sample
Points are set by interface.Measurement data meas (nTs3) it is by as data partially, after the compensation of frequency deviation equal error parameter, characteristic
It is identical with reference data.Accurate sign synchronization module utilizes reference data ref (nTs3) and measurement data meas (nTs3) march
Line is fitted, and carries out the precise synchronization in sampling interval, and specific implementation step is as follows：
A) to meas (nTs3) curve matching meas1 (nTs3), reduce noise jamming；
B) reference data ref (nT are calculated respectivelys3) and measurement data meas (nTs3) phase phref (nTs3)=phase
(ref(nTs3)), phmeas (nTs3)=phase (meas (nTs3))；
C) phase phref (nT are eliminated respectivelys3), phmeas (nTs3) (- 180o, 180o) trip point, obtain continuous
Phase phrefcw (nTs3), phmeascw (nTs3)；
D) calculate respectively phase-accumulated and be phrsum (nTs3)=phrsum ((n-1) Ts3)+phrefcw(nTs3),
phmsum(nTs3)=phmsum ((n-1) Ts3)+phmeascw(nTs3)；
E) phase difference of reference data and measurement data, Perr (nT are calculateds3)=phrsum (nTs3)-phmsum(nTs3)；
F) second-order loop filter is designed, loop filtering is carried out to phase difference；
G) carry out curve fitting, obtain the precise synchronization moment.
7) after precise synchronization gain of parameter, with reference to preliminary synchronisation parameter and filtering parameter, variable Rate/synchronization combining is realized
Module completes variable Rate and precise synchronization function.The data of output are x2(nTs2)。
For digital demodulation, in demodulating process, matched filtering and sampling adjudicate and are required for ensureing one in each link
There is integer sampled point in symbol, and optimum sampling point time data is determined from these sampled points, realize sign synchronization.
Variable Rate/synchronization combining realizes that the purpose of module is in intermediate frequency I/Q data x (nTs1) on the basis of most preferably adopted
Sampling point data x2(nTs2).Realization principle froms the perspective of from time domain, intermediate frequency I/Q data x (nTs1) can without distortions rebuild and recover original letter
Number x (t), is then determining the optimum sampling moment, specific implementation step is as follows according to variable Rate parameter and synchronization parameter：
A) variable Rate parameter and the validity of synchronization parameter are determined, parameter setting in effective scope, prevents speed change
Rate/synchronization combining, which is realized, there is exception；
B) determined by variable Rate parameter and synchronization parameter, the optimum sampling moment, the optimum sampling moment as shown in Figure 6 is shown
It is intended to.Due to x (nTs1) and x2(nTs2) analog signal x (t) can be all characterized, within a certain period of time, x (nTs1) there is N1 samplings
Point, x2(nTs2) there is this N2 sampled point.For x (nTs1), this period, length was t1=(N1-1)Ts1.For x2(nTs2), when
Between length be t2=(N2-1)Ts2.Because Ts1And Ts2It is not integral multiple relation, so t1And t2It is not stringent equal.Here t2Take
Near t1Be less than or equal to t1Numerical value.So have
C) Nyquist sampling thheorems are utilized, for intermediate frequency I/Q data x (nTs1) recovered, obtain original signal x (t).
Due to Digital Implementation, recover t=nT in original signal x (t)0, T0It is related with obtaining data precision, work as T0When tending to 0, for simulation
Signal；
D) according to the optimum sampling moment, resampling is carried out to original signal x (t), obtains optimum sampling point data x2
(nTs2)。
Because the data recovery for the sampling instant that the present invention is concerned about, without x (t) is carried out full recovery, so,
Step c) and d) while realized when realizing.Computational complexity can be so effectively reduced, shortens data processing time.
8) the precise synchronization data of output are x2(nTs2) by the more accurate measurement data meas of subsequent demodulation algorithm acquisition
(nTs3), obtain precise synchronization parameter into accurate sign synchronization module.
9) as intermediate frequency I/Q data x (nTs1) when not being desired signal, become the value that digit rate parameter will be reduced to save as last time,
Precise synchronization parameter initialization is 0, and preliminary synchronisation parameter is obtained according to algorithm, has uncertainty, but can be in reasonably value model
In enclosing.
10) when vector parameters set incorrect, it is uncertain to cause to become digit rate parameter and synchronization parameter, but can be reasonable
Value in the range of.
Understand from the above description, the present invention is in order to overcome the operand of symbol timing synchronization method in the prior art larger
Problem, it is an object of the invention to a kind of Vector Signal Analysis suitable for radio communication detecting system it is high-precision, digital,
Variable Rate sign synchronization scheme.
(1) this synchronous method is full digital starting, using arrange parameter and measurement parameter, estimates variable Rate parameter and same
Parameter is walked, using realizing that variable Rate/synchronization combining algorithm realizes the output of optimum sampling point.
(2) this synchronous method uses measurement parameter, data processing is formed closed loop, in order to rapidly enter stable state,
Using two-stage symbol timing synchronization method.
(3) variable Rate/synchronization combining realizes that module is used to complete two functions of variable Rate and sign synchronization.Utilize variable Rate
Filter parameter design module offer variable Rate realizes that parameter, and preliminary symbol synchronization module, accurate sign synchronization module carry
For sign synchronization parameter, sampling variable Rate/synchronization combining realizes that algorithm realizes high accuracy, variable Rate sign synchronization.Realization principle
For：For the data after sampling, the either sampling of integral multiple chip rate or small several times parameter code member polydispersity index, all include
All information of signal, can be used for recovering the signal data value of any time, therefore variable Rate and sign synchronization are combined, together
Step realizes the data output of optimum sampling point.
(4) variable Rate filter parameter design module realizes that module provides variable Rate parameter for variable Rate/synchronization combining.Root
According to the required precision of Vector Signal Analysis, determine the trailing length of wave filter and count per symbol, be finally completed variable Rate low pass
Wave filter designs.The trailing length of wave filter directly affects width-frequency characteristic of signal, impact analysis performance.But with hangover
The increase of length, the time of computing, the resource of consumption are all by increase exponentially again.By windowed function, effectively reduce and drag
Influence of the tail length degree to analytical performance.
(5) preliminary synchronisation module and accurate sign synchronization module realize that module provides synchronous ginseng for variable Rate/synchronization combining
Number.Preliminary synchronisation module completes sampling data synchronization in per symbol, and synchronization accuracy is equal to points and chip rate product per symbol
Inverse.Accurate sign synchronization algorithm is the sign synchronization between further sampled data, and synchronization accuracy is more than preliminary synchronisation precision
One times.
(6) accurate sign synchronization module is to carry out curve using the measuring signal and reference signal of Vector Signal Analysis output
Fitting is realized.Reference signal is as ideal signal, it is considered to be the signal of transmitting.Measuring signal is considered as transmitting signal through letter
Signal after road interference, therefore using the relation between measuring signal and reference signal, complete accurate sign synchronization estimation.
(7) preliminary synchronisation module can make secondary synchronization method enter stable state quickly.Enter and correct in valid data
Before parameter setting, various synchronization parameters are unknown.When measurement starts, test result is uncertain, it is easy to is caused whole
The unstability of test system.Increase preliminary synchronisation module, the most fast normal work of test system can be made.
Although being example purpose, the preferred embodiment of the present invention is had been disclosed for, those skilled in the art will recognize
Various improvement, increase and substitution are also possible, and therefore, the scope of the present invention should be not limited to above-described embodiment.
Claims (2)
- A kind of 1. symbol timing synchronization method of radio communication detecting system, it is characterised in that the described method includes：According to the required precision of Vector Signal Analysis, filter factor is obtained；According to the mean power of sampled point in intermediate frequency i/q signal symbol period, the first synchronization parameter is obtained；Demodulating data is obtained by using first synchronization parameter to be calculated, and obtains the second synchronization parameter；Wherein, described Two synchronization parameters are higher than the accuracy of first synchronization parameter；Based on the filter factor, first synchronization parameter, second synchronization parameter, and the intermediate frequency i/q signal inputted, Sign synchronization data are calculated；Wherein, sign synchronization position is obtained according to the mean power of sampled point in intermediate frequency i/q signal symbol period, estimation；Based on the sign synchronization position, the first synchronization parameter is obtained；By being demodulated to the synchrodata of first synchronization parameter, measurement data and reference data are obtained；Estimated according to the time domain specification of the measurement data and reference data, the accurate sign synchronization moment；Based on the sign synchronization moment, the second synchronization parameter is obtained；According to first synchronization parameter, second synchronization parameter, the optimum sampling moment is determined；The intermediate frequency i/q signal is recovered according to the filtering parameter, obtains original signal；Resampling is carried out to the original signal according to the optimum sampling moment, obtains optimum sampling point data, i.e., it is described Sign synchronization data.
- 2. the sign synchronization device of a kind of radio communication detecting system, it is characterised in that described device includes：Variable Rate filter parameter designs module, for the required precision according to Vector Signal Analysis, obtains filter factor；Preliminary symbol synchronization module, for the mean power according to sampled point in intermediate frequency i/q signal symbol period, it is same to obtain first Walk parameter；Accurate sign synchronization module, is calculated for obtaining demodulating data by using first synchronization parameter, obtains the Two synchronization parameters；Wherein, second synchronization parameter is higher than the accuracy of first synchronization parameter；Variable Rate/synchronization combining realizes module, for based on the filter factor, first synchronization parameter, described second same Parameter, and the intermediate frequency i/q signal of input are walked, sign synchronization data are calculated；Wherein, the preliminary symbol synchronization module, is additionally operable to：According to the average work(of sampled point in intermediate frequency i/q signal symbol period Rate, estimation obtain sign synchronization position；Based on the sign synchronization position, the first synchronization parameter is obtained；The accurate sign synchronization module, is additionally operable to：By being demodulated to the synchrodata of first synchronization parameter, obtain Measurement data and reference data；Estimated according to the time domain specification of the measurement data and reference data, the accurate sign synchronization moment； Based on the sign synchronization moment, the second synchronization parameter is obtained；Variable Rate/the synchronization combining realizes module, is additionally operable to：According to first synchronization parameter, second synchronization parameter, Determine the optimum sampling moment；The intermediate frequency i/q signal is recovered according to the filtering parameter, obtains original signal；According to The optimum sampling moment carries out resampling to the original signal, obtains optimum sampling point data, i.e., described sign synchronization Data.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022280A (en) * | 2006-12-15 | 2007-08-22 | 清华大学 | Orthogonal lower mixing frequency digital template matching pulse ultra wide band radio signal receiving method |
| EP2159980A3 (en) * | 2008-09-01 | 2010-10-20 | Mitsubishi Electric Corporation | Orthogonal frequency division multiplexed signal receiving apparatus and receiving method thereof |
| CN102023290A (en) * | 2010-11-04 | 2011-04-20 | 中国民用航空总局第二研究所 | High-precision distributed pulse signal time difference of arrival detection system |
| CN102065056A (en) * | 2011-01-10 | 2011-05-18 | 郑州大学 | Method for realizing MQAM (Multiple Quadrature Amplitude Modulation) signal modulation mode identification of any constellation diagram on basis of clustering |
| CN102546484A (en) * | 2010-12-17 | 2012-07-04 | 上海明波通信技术有限公司 | Signal channel training method and signal channel training receiver device based on beacon frame |
| CN104243386A (en) * | 2014-08-15 | 2014-12-24 | 电子科技大学 | Additional channel information transmission method for multi-carrier communication system |
-
2014
- 2014-12-29 CN CN201410835505.XA patent/CN104618288B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022280A (en) * | 2006-12-15 | 2007-08-22 | 清华大学 | Orthogonal lower mixing frequency digital template matching pulse ultra wide band radio signal receiving method |
| EP2159980A3 (en) * | 2008-09-01 | 2010-10-20 | Mitsubishi Electric Corporation | Orthogonal frequency division multiplexed signal receiving apparatus and receiving method thereof |
| CN102023290A (en) * | 2010-11-04 | 2011-04-20 | 中国民用航空总局第二研究所 | High-precision distributed pulse signal time difference of arrival detection system |
| CN102546484A (en) * | 2010-12-17 | 2012-07-04 | 上海明波通信技术有限公司 | Signal channel training method and signal channel training receiver device based on beacon frame |
| CN102065056A (en) * | 2011-01-10 | 2011-05-18 | 郑州大学 | Method for realizing MQAM (Multiple Quadrature Amplitude Modulation) signal modulation mode identification of any constellation diagram on basis of clustering |
| CN104243386A (en) * | 2014-08-15 | 2014-12-24 | 电子科技大学 | Additional channel information transmission method for multi-carrier communication system |
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