CN108712221A - A kind of VHF communication radio station channel measurement collection optimum choice method and system - Google Patents
A kind of VHF communication radio station channel measurement collection optimum choice method and system Download PDFInfo
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- CN108712221A CN108712221A CN201810270445.XA CN201810270445A CN108712221A CN 108712221 A CN108712221 A CN 108712221A CN 201810270445 A CN201810270445 A CN 201810270445A CN 108712221 A CN108712221 A CN 108712221A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
Abstract
The present invention relates to a kind of VHF communication radio station channel measurement collection optimum choice method and system, are made an uproar according to total number of channels amount n input by user, working channel quantity K, channel bottom and change Probability pE, channel bottom makes an uproar the accuracy requirement P of variation range s and channel measurement collection selectioncoverAmount to 5 parameters, before VHF communication radio station starts sounding channel quality, using a kind of tagmeme covering measures computational methods, calculate the optimal value for determining channel measurement collection size, to which communication station can be according to the optimal value from the result that energy detection method obtains, it is preferred that going out a best channel measurement set, further channel quality detection is carried out.The present invention can predefine the optimal value of channel measurement collection size before channel detection, while utmostly reducing channel measurement number and energy expenditure, reduce station location exposure, meet the channel measurement collection selection accuracy requirement of user's proposition.
Description
Technical field
The invention belongs to cognitive radio technologies and big data crossing domain, and in particular to cognitive radio VHF communication electricity
Platform channel measurement collection optimum choice method and system.
Background technology
Channel measurement refers to being sent on some channel from a sending station after radio station synchronizes using two radio station
Message measures the signal-to-noise ratio of channel during receiving message by receiving radio station, repeats the process, amount to a reception radio station
B channel is similarly tested, finally determines the highest K channel of optimal quality signal-to-noise ratio as working channel.Due to
Channel measurement more consumes energy, it is therefore desirable to traditional energy detection method is used, it is empty from a frequency spectrum comprising n channel
Between in select the B channel made an uproar with relatively low bottom in advance, which is known as the selection of channel measurement collection.The present invention, which primarily focuses on, to adopt
With user's communication station of frequency fixing communication mode, it is preferred that emphasis is the size of reasonable channel measurement collection can meet communication quality need
It asks, and radio station energy expenditure can be effectively reduced.
Since 2005, with the worsening shortages of frequency spectrum resource, cognition wireless electric theory is developed rapidly with technology, respectively
Kind frequency spectrum perception, frequency spectrum decision and moving method continue to bring out.In 4 kinds of classical ways of frequency spectrum perception, proposes and obtain earliest
To most widely used for energy detection method.Energy detection method is quick, simple, safe, but efficiency is also the most simultaneously
Lowly, accuracy rate is usually 50% or so.The classical way of other three kinds of frequency spectrum perceptions, although efficiency increases, limit
In the channel quality detection pattern of Passive Mode, accuracy rate is difficult to break through.In view of the above-mentioned problems, applicant proposed based on actively
The spectral channel detection method of detection mode, frequency spectrum perception accuracy rate can be improved to 90% or so.Based on active probe pattern
Spectral channel detection method is the energy that each channel is obtained using energy detection method first, and then therefrom selection a batch has
There is the channel of lower energy value, the last special channel with lower energy value carries out the channel quality detection of active, therefrom determines
Plan preferred channels set.Since active channel quality detection has carried out accurate measurement to the link attenuation of channel,
The accuracy rate of frequency spectrum perception can be promoted significantly.Although the spectral channel detection method based on active probe pattern can
Perception accuracy rate is increased substantially, but due to its active characteristic, in certain application scenarios and ring for needing hidden self-position
In border, this channel detection method is easy exposure self-position.If it is possible to propose that a kind of cognitive radio channel measures
Collect optimum choice method, reduce the range of active channel measurement to the greatest extent, it will be able in the base for ensureing higher frequency spectrum perception accuracy
Enhance the safety of cognitive radio system on plinth to the maximum extent.
The problem of for above-mentioned communication station channel measurement collection optimum choice, solution is typically by artificial warp at present
It tests, the channel of fixed quantity is selected to be detected.This pure method for selecting channel measurement collection by artificial experience, is mainly deposited
In two problems：First, the channel measurement collection of selection is too small, to the frequency spectrum resource of missed communication better quality；Second is that selection
Channel measurement collection is excessive, it is likely that increases the risk of exposure self-position, while it is also possible to due to detecting excessive channel
And waste more system resources.
Invention content
The technology of the present invention solves the problems, such as：For the above-mentioned shortcoming for selecting channel measurement collection by artificial experience, this hair
It is bright to propose a kind of VHF communication radio station channel measurement collection optimum choice method, best channel measurement collection is determined, using big data skill
Art determines best channel measurement collection.
This method can predefine the optimal value of channel measurement collection size, utmostly reduce before channel detection
While channel measurement number and energy expenditure, reduction station location exposure, meet the channel measurement collection choosing of user's proposition
Select accuracy requirement.
The technical solution adopted by the present invention is that：
VHF communication radio station channel measurement collection optimum choice method, provides a radio station running parameter for radio station user first
Input interface allows radio station user to input every radio station running parameter and desired channel measurement collection selection accuracy requirement
Pcover.Then it is calculated using a kind of tagmeme covering measures computational methods and determines the optimal value B of channel measurement collection size and send to
Radio station system after radio station system receives B, using energy detection method, detects n channel, and the bottom for obtaining each channel is made an uproar, and
It makes an uproar sequence from low to high the bottom of according to, selection wherein B channel progress channel detection.Wherein, tagmeme covering measures computational methods
In include double random K Maximum Probability Distribution computational methods and double outcross probability distribution calculation methods at random.
Above-mentioned VHF communication radio station channel measurement collection optimum choice method, the radio station running parameter input interface, radio station are used
Family inputs the total number of channels amount n that radio station may use by the interface, and input needs the working channel quantity K of selection；Input letter
Measured value is made an uproar at road bottom may changed Probability p within certain time tE, measured value is made an uproar in certain time t in input channel bottom
Within may changed range s；Input the desired channel measurement collection selection accuracy requirement P of radio station usercover。
Above-mentioned VHF communication radio station channel measurement collection optimum choice method, a kind of tagmeme covering measures computational methods are
According to the total number of channels amount n input by user, the working channel quantity K, the Probability pE, the range s and the standard
True property requires PcoverThe optimal value B of the channel measurement collection size is calculated in 5 parameters.
The beneficial effects of the invention are as follows：
(1) present invention can predefine the optimal value B of channel measurement collection size, utmostly before channel detection
It reduces channel measurement number and energy expenditure, reduce station location exposure, and the channel measurement collection selection for meeting user is accurate
True property requirement.106 tests are carried out using 106 days spectrum measurement data, in the channel measurement collection selection for meeting user's proposition
Accuracy reaches under 90% requirement, the present invention can determine channel measurement collection size optimal value B be 128, with user according to
Empirically determined channel measurement collection size 426 is compared, and channel measurement number declines about 70%.
(2) double random K Maximum Probability Distribution computational methods, the meter are used in tagmeme covering measures calculating process
Calculation method after the bottom of several channels makes an uproar and changes, can calculate the probability distribution for the maximum value that the bottoms of these channels is made an uproar,
The accuracy that channel measurement collection size optimal value B is calculated can be improved.
(3) in tagmeme covering measures calculating process, double random outcross probability distribution calculation methods are used, this method is used
In the bottom for calculating a collection of channel is made an uproar, at least several channels, bottom is made an uproar no more than the probability distribution of some designated value, and letter can be improved
The accuracy that road measurement set size optimal value B is calculated.
Description of the drawings
Fig. 1 is the flow chart that the method for the present invention is realized.
Specific implementation mode
The case study on implementation of the present invention is further provided for reference to invention content.
As shown in Figure 1, developing prototype system based on the method for the present invention, which includes user data input interface mould
Block, channel measurement collection size optimal value B decision-making modules, double random K Maximum Probability Distribution computing module surmount at random with double
Probability distribution computing module, here are specific operating process.
(1) user is inputted by the Data Input Interface module amounts to 5 parameters：Total number of channels amount n；Working channel number
Measure K；Measured value is made an uproar at channel bottom may changed Probability p within certain time tE；Measured value make an uproar in a timing in channel bottom
Between within t may changed range s, that is, assume channel f, the bottom when measuring first time is made an uproar as x, then after the t times
Continue to measure to make an uproar y on earth, bottom is made an uproar with probability (1-pE) remain unchanged, i.e. y=x, with Probability pEIt changes, and with equiprobability
In Qu Jian [x-s,x+s]Upper value, i.e. y equiprobability take Qu Jian [x-s,x+s]On one value；The desired channel of radio station user is surveyed
Quantity set selects accuracy requirement Pcover, it is desirable that PcoverLess than 1 and it is more than 0.
(2) system passes through the channel measurement collection size optimal value B decision-making modules, according to the following steps (2.1)~calculating
Channel measurement collection size optimal value B.
(2.1) K+1 is assigned to temporary variable b.
(2.2) start to calculate Probability p according to formula (1)cover(K, b), if pcover(K, b) is inputted more than radio station user
Channel measurement collection selection accuracy requirement Pcover, then return to (2.4)；Otherwise it goes to (2.3).
(2.3) b is otherwise increased by 1, gone to (2.2).
(2.4) it sets B to b, terminates.
(3) system is by double random K Maximum Probability Distribution computing modules, according to formula (2) calculation formula (1)
In function pK{ M=m }.Wherein, p { M=m } indicates K in Qu Jian [1,K]The stochastic variable of upper equal-probability distribution is becoming
The probability that maximum value stochastic variable M after change is m, K are the integer more than 1, pEIt is variation probability input by user, indicates random
The changed probability of variable, s are variation ranges input by user, indicate the changed range of stochastic variable, wherein flower includes
Each formula in arc respectively represents double random K maximum value method for calculating probability under a kind of M value conditions.
(4) system is by double random outcross probability distribution calculation modules, according in formula (3) calculation formula (1)
Function p≥b-K(Y≤m).Segmentation calculates when function p (Y≤m) in calculation formula (3)：WhenAccording to formula (4)
It calculates；WhenIt calculates according to formula (5), as s >=n-K-1, is calculated according to formula (6).Formula
(4), each formula in (5), (6) in curly bracket corresponds to the computational methods under a kind of m value conditions respectively.Wherein p≥b-K(Y≤
M) n-K are indicated in Qu Jian [1+K,n]Value Ys of the stochastic variable Y of upper equal-probability distribution after changing is less than or equal to m's
Probability, K are the integer more than 1, and b is the integer more than K, pEIt is variation probability input by user, indicates that stochastic variable becomes
The probability of change, s are variation ranges input by user, indicate the changed range of stochastic variable, n is that channel input by user is total
Quantity.
The present invention proposes that a kind of VHF communication radio station channel is surveyed to the doubt problem of communication station channel measurement collection size
Quantity set optimum choice method.This method can predefine the optimal value B of channel measurement collection size, most before channel detection
Big degree reduces channel measurement number and energy expenditure, reduces station location exposure, while meeting the channel of user's proposition
Measurement set selects accuracy requirement.
Part of that present invention that are not described in detail belong to the well-known technology of those skilled in the art.
Above example is provided just for the sake of the description purpose of the present invention, and is not intended to limit the scope of the present invention.This
The range of invention is defined by the following claims.It does not depart from spirit and principles of the present invention and the various equivalent replacements made and repaiies
Change, should all cover within the scope of the present invention.
Claims (4)
1. a kind of VHF communication radio station channel measurement collection optimum choice method, which is characterized in that include the following steps：
(1) a radio station running parameter input interface is provided for radio station user first, radio station user is allowed to input every radio station work
Parameter and desired channel measurement collection selection accuracy requirement Pcover；
(2) it is calculated using a kind of tagmeme covering measures computational methods and determines the optimal value B of channel measurement collection size and send electricity to
Platform system after radio station system receives B, using energy detection method, detects n channel, the bottom for obtaining each channel is made an uproar, and is pressed
It makes an uproar sequence from low to high the bottom of according to, selection wherein B channel progress channel detection；Wherein, in tagmeme covering measures computational methods
It is calculated simultaneously using double random K Maximum Probability Distribution computational methods and double random outcross probability distribution calculation methods,
Double random K Maximum Probability Distribution computational methods can calculate these channels after the bottom of several channels makes an uproar and changes
The probability distribution of maximum value made an uproar of bottom；The bottom that double random outcross probability distribution calculation methods are used to calculate a collection of channel is made an uproar,
It makes an uproar less than or equal to the probability distribution of some designated value at the bottom of at least several channels, these several channels.
2. channel measurement collection optimum choice method in VHF communication radio station according to claim 1, it is characterised in that：It is described
Double random K Maximum Probability Distribution computational methods realizations are as follows, and each formula wherein in curly bracket is respectively represented in a kind of M
Double random K maximum value method for calculating probability under value condition：
Wherein, p { M=m } indicates K in Qu Jian [1,K]Maximum value of the stochastic variable of upper equal-probability distribution after changing
For the probability of m, K is the integer more than 1, pEIt is variation probability input by user, indicates the changed probability of stochastic variable, s
It is variation range input by user, indicates the changed range of stochastic variable.
3. channel measurement collection optimum choice method in VHF communication radio station according to claim 1, it is characterised in that：It is described
Double random outcross probability distribution calculation methods are implemented as follows, wherein p≥b-K(Y≤m) indicates n-K in Qu Jian [1+K,n]On
Value Y of the stochastic variable of equal-probability distribution after changing is less than or equal to the probability of m, and K is integer more than 1, b be more than
The integer of K, pEIt is variation probability input by user, indicates the changed probability of stochastic variable, s is variation model input by user
It encloses, indicates that the changed range of stochastic variable, n are total number of channels amounts input by user, formula (1) is used for calculating function p≥b-K
(Y≤m), the function p (Y≤m) in formula (1), whenWhen according to formula (2) calculate, whenWhen according to formula (3) calculate, as s >=n-K-1 according to formula (4) calculate；Formula (2),
(3), each formula in (4) in curly bracket corresponds to the computational methods under a kind of m value conditions respectively：
4. a kind of VHF communication radio station channel measurement collection optimum choice system, it is characterised in that：Including：User data input interface
Module, channel measurement collection size optimal value B decision-making modules；
User data input interface module provides a radio station running parameter input interface for radio station user, makes radio station user defeated
Enter every radio station running parameter and desired channel measurement collection selection accuracy requirement Pcover；
Channel measurement collection size optimal value B decision-making modules are calculated using a kind of tagmeme covering measures computational methods and determine that channel is surveyed
The optimal value B of quantity set size simultaneously sends radio station system to, after radio station system receives B, using energy detection method, detection n
Channel, the bottom for obtaining each channel are made an uproar, and are made an uproar sequence from low to high the bottom of according to, selection wherein B channel progress channel detection.
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Cited By (1)
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| CN110166149B (en) * | 2019-04-15 | 2021-05-04 | 中电科（宁波）海洋电子研究院有限公司 | Channel self-adaptive selection method suitable for very high frequency radio device |
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