CN107332633A - A kind of cognitive radio frequency spectrum detection method - Google Patents
A kind of cognitive radio frequency spectrum detection method Download PDFInfo
- Publication number
- CN107332633A CN107332633A CN201710504729.6A CN201710504729A CN107332633A CN 107332633 A CN107332633 A CN 107332633A CN 201710504729 A CN201710504729 A CN 201710504729A CN 107332633 A CN107332633 A CN 107332633A
- Authority
- CN
- China
- Prior art keywords
- signal
- coupled
- channel
- operational amplifier
- energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001228 spectrum Methods 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 230000001149 cognitive effect Effects 0.000 title claims abstract description 19
- 230000008447 perception Effects 0.000 claims abstract description 9
- 230000004044 response Effects 0.000 claims abstract description 7
- 230000002708 enhancing effect Effects 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 239000004411 aluminium Substances 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- ONUFESLQCSAYKA-UHFFFAOYSA-N iprodione Chemical compound O=C1N(C(=O)NC(C)C)CC(=O)N1C1=CC(Cl)=CC(Cl)=C1 ONUFESLQCSAYKA-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- 238000004891 communication Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
The invention discloses a kind of cognitive radio frequency spectrum detection method, comprise the following steps：Step one, the energy on each channel on existing frequency spectrum is gathered；Step 2, sets a signal generator for being used to send interrogation signal, using in signal generator transmission interrogation signal to high-energy channel；Step 3, the signal received according to signal receiver selects the channel for sending response signal, is defined as primary user's busy channel, and formula is as follows：Step 4, using the energy threshold updated in step 3 as judge primary user whether the energy threshold of busy channel, carry out frequency spectrum perception, and return to step one detects the energy on channel again.The cognitive radio frequency spectrum detection method of the present invention, pass through the setting of step 2 and step 3, just whether whether can be fed back whether to judge the energy value on the now channel with the presence of primary user according to primary user, this makes it possible to accurately and effectively determine energy threshold.
Description
Technical field
The present invention relates to a kind of cognitive radio technology, more particularly to a kind of cognitive radio frequency spectrum detection side
Method.
Background technology
Cognitive radio is a kind of application method of the radio put forward for limited frequency spectrum resource, and its purpose is just
Be be using flexibly using idle frequency spectrum by the way of increase the utilization rate of frequency spectrum, and then realization is in limited frequency spectrum resource
In the case of, using the teaching of the invention it is possible to provide the effect communicated to more users.
The mode of operation of existing cognitive radio is substantially, and is perceived idle frequency spectrum and primary user, is then utilized the free time
Frequency spectrum is communicated, and the two steps are constantly circulated, and can timely jump out current spectral after primary user is perceived, is kept away
Exempt from the communication to primary user and produce interference, while fast and effectively frequency-hopping action is carried out, thus whether cognitive user is for primary
Whether family produces the correctness that interference mainly still relies on perception situation, therefore the detection in cognitive radio for frequency spectrum
It is highly important with perception, existing the most frequently used detection frequency spectrum and the mode perceived are by the way of energy measuring, to lead to
Cross and detect the energy size in spectral channel to determine whether channel now has primary user using communication, yet with existing
It is regular during some radio communications that interference signal, as interchannel noise occurs, therefore setting primary user whether there is
Threshold value be just difficult to determine, channel now so just can not be accurately judged during frequency spectrum detection well
Whether the inside is with the presence of primary user.
The content of the invention
In view of the deficienciess of the prior art, accurately can judge it is an object of the invention to provide one kind in channel
Whether with the presence of primary user cognitive radio frequency spectrum detection method.
To achieve the above object, the invention provides following technical scheme：A kind of cognitive radio frequency spectrum detection method, bag
Include following steps：
Step one, gather the energy on each channel on existing frequency spectrum, while preset an energy threshold, by channel according to
Its energy collected compared with energy threshold after classify, be divided into high-energy channel and low energy channel；
Step 2, sets a signal generator for being used to send interrogation signal, inquiry letter is sent using signal generator
Number in high-energy channel, while setting a signal receiver to be used to receive the response signal that primary user sends；
Step 3, the signal received according to signal receiver selects the channel for sending response signal, is defined as primary user and accounts for
With channel, while extracting the energy value corresponding to primary user's busy channel, and default energy cut-off is updated according to below equation
Value, formula is as follows：
Wherein, X is the energy threshold after updating, a1、a2。。。。aNFor the 1st to N high-energy channels, N is the quantity of channel
Numbering；
Step 4, using the energy threshold updated in step 3 as judge primary user whether the energy threshold of busy channel,
Frequency spectrum perception is carried out, and return to step one detects the energy on channel again.
As a further improvement on the present invention, the signal generator used in the step 2 includes shell and is arranged on
Signal generating circuit in shell, the signal generating circuit includes：
Operational amplifier U1, the operational amplifier U1 in-phase input end are coupled with after electric capacity C1 and are grounded, and have been also coupled to electricity
Hinder and be grounded after R1, the output end of the operational amplifier U1 is used to export sine wave, and be coupled with the electric capacity C2 being serially connected and
Be coupled to its in-phase input end after resistance R2, the inverting input of the operational amplifier U1 be coupled with after resistance R4 be coupled to it is defeated
Go out end；
Operational amplifier U2, the operational amplifier U2 output end reversal connection, which have, to be coupled with electric capacity C4 and is followed by after diode D1
Ground, has been also coupled to be grounded after resistance R7, the inverting input of the operational amplifier U2 be coupled with the resistance R9 that is serially connected and
Operational amplifier U1 output end is coupled to after diode D2, the inverting input has been also coupled to resistance R8 and has been coupled to operation amplifier
Device U2 output end, the in-phase input end of the operational amplifier U2, which is coupled with after resistance R10, to be grounded, and has been also coupled to diode D3
Operational amplifier U1 output end is coupled to afterwards；
Switching tube G, switching tube G has first end, the second end and control end, and the control end is coupled with coupling after electric capacity R6
Operational amplifier U2 output end is connected to, first end is coupled to after being also coupled to the electric capacity C3 and resistance R5 that are serially connected, it is described
Second end is grounded, and the inverting input that switching tube G first end is also coupled to after resistance R3 with operational amplifier U1 is coupled；
Interface circuit, the interface circuit is coupled to operational amplifier U output end, is further coupled to foreign channels, is used for
The sine wave signal that operational amplifier U output end is exported is output in foreign channels.
As a further improvement on the present invention, the interface circuit includes：
Wave filter, is coupled to operational amplifier U output end, to the sine for exporting operational amplifier U output end
Ripple is exported after being filtered；
Wireless signal transmitter, is coupled to wave filter, for the filtered sine wave signal of receiving filter, and by sine
Ripple signal is converted into wireless signal and is output in foreign channels.
As a further improvement on the present invention, the shell includes upper shell and lower house, the upper shell and lower house
Between be detachably connected, form the accommodating chamber of a receiving signal generating circuit, the upper shell dorsad lower house each other
Side be provided with antenna, the antenna and wireless signal transmitter are coupled, and the antenna includes signal emitter and signal enhancing
Body, the signal enhancing body is fixed on the side of upper shell, and the signal emitter is fixed on signal enhancing body, described
Signal emitter is coupled with wireless signal transmitter, and the signal emitter includes transmitting mobile jib and some transmitting poles, institute
The one end for stating transmitting mobile jib is fixedly connected with the side of upper shell, is also coupled with wireless signal transmitter, the one of some poles
End is each attached to one end of mobile jib dorsad upper shell, the other end dorsad mobile jib in the setting of outside emitting shape, the signal enhancing body
For one piece with aluminium sheet with concave surfaces, the mobile jib is connected to aluminium sheet relative to the other end of pole and sets side with concave surfaces, described
Aluminium sheet dorsad concave surface side towards upper shell set.
As a further improvement on the present invention, the signal receiver includes housing and the reception being arranged in housing electricity
Road, the receiving circuit includes：
Reception antenna, for being communicated with foreign channels, receives the wireless feedback signal that primary user sends, and be converted into telecommunications
Exported after number, wherein, there is channel number and feedback information in wireless feedback signal；
Bandpass filter, coupling and reception antenna, the electric signal exported for reception antenna, and electric signal is subjected to band logical
Exported after filtering；
Writing circuit, is stored with channel number, is coupled to bandpass filter, is further coupled to reception antenna, for connecing
The electric signal of take-up bandpass filter output and the signal numbering of reception antenna output, by the electric signal received according to channel number
Recorded.
Beneficial effects of the present invention, pass through the setting of step one, it is possible to effectively collect each on existing frequency spectrum
Energy on individual channel, is then divided into two classes by channel according to the numerical value of energy, then passes through the setting of step 2, it is possible to have
Effect when perceived spectral, it is possible to send interrogation signal to the channel of high-energy, judge the channel of high-energy now
Whether it is that primary user is using, passes through the setting of step 3, it is possible to according to the energy balane for determining the channel that primary user takes
Go out energy threshold, energy threshold is then updated by this numerical value, this energy threshold is to take to believe closest to primary user
Produced energy when road, so just need not be compared with equally, energy threshold is caused by default mode in technology
Primary user the problem of judge not accurate enough, present invention employs the mode of dynamic threshold, such energy threshold can be with primary
Family corresponding and change, it is ensured that energy threshold can maximize energy produced during close to primary user's busy channel.
Brief description of the drawings
Fig. 1 is the overall structure figure of signal generator；
Fig. 2 is the circuit diagram of signal generating circuit；
Fig. 3 is the module frame chart of receiving circuit.
Embodiment
The present invention is described in further detail below in conjunction with the embodiment given by accompanying drawing.
Referring to figs. 1 to shown in 3, a kind of cognitive radio frequency spectrum detection method of the present embodiment comprises the following steps：
Step one, gather the energy on each channel on existing frequency spectrum, while preset an energy threshold, by channel according to
Its energy collected compared with energy threshold after classify, be divided into high-energy channel and low energy channel；
Step 2, sets a signal generator for being used to send interrogation signal, inquiry letter is sent using signal generator
Number in high-energy channel, while setting a signal receiver to be used to receive the response signal that primary user sends；
Step 3, the signal received according to signal receiver selects the channel for sending response signal, is defined as primary user and accounts for
With channel, while extracting the energy value corresponding to primary user's busy channel, and default energy cut-off is updated according to below equation
Value, formula is as follows：
Wherein, X is the energy threshold after updating, a1、a2。。。。aNFor the 1st to N high-energy channels, N is the quantity of channel
Numbering；
Step 4, using the energy threshold updated in step 3 as judge primary user whether the energy threshold of busy channel,
Frequency spectrum perception is carried out, and return to step one detects the energy on channel again, in the process of the detection method using the present embodiment
In, the energy on existing frequency spectrum on each channel can effectively be collected by step one, then according to the energy collected
Size classified, break a channel into high-energy channel and low energy channel, can be sent out afterwards by step 2 by signal
Raw device sends an interrogation signal, then allows primary user to produce the mode responded, whether further determine that the channel of high-energy has
Primary user is present, and then passes through the setting of step 3, it is possible to which effective extract is defined as corresponding to primary user's busy channel
Energy value, then can just be calculated by calculation formula these the energy value average value got be used as renewal energy cut-off
Value, so just can effectively realize that the dynamic of an energy threshold is adjusted, and the threshold value after adjustment is determined by multiple
What the energy balane produced by primary user's busy channel came out, thus update after energy threshold more can accurately tell
Channel is that primary user takes or interchannel noise on earth, and the setting for passing through step 4, it is possible to effective according to the energy updated
Measure threshold value and carry out frequency spectrum perception and communication, so just can effectively avoid energy threshold of the prior art from using and set in advance
The energy value for the channel that the primary user of fixed mode, caused given threshold and reality takes produces deviation, causes frequency spectrum perception
The problem of idle channel can not being perceived well.
As a kind of improved embodiment, the signal generator used in the step 2 includes the He of shell 1
The signal generating circuit 2 in shell 1 is arranged on, the signal generating circuit 2 includes：
Operational amplifier U1, the operational amplifier U1 in-phase input end are coupled with after electric capacity C1 and are grounded, and have been also coupled to electricity
Hinder and be grounded after R1, the output end of the operational amplifier U1 is used to export sine wave, and be coupled with the electric capacity C2 being serially connected and
Be coupled to its in-phase input end after resistance R2, the inverting input of the operational amplifier U1 be coupled with after resistance R4 be coupled to it is defeated
Go out end；
Operational amplifier U2, the operational amplifier U2 output end reversal connection, which have, to be coupled with electric capacity C4 and is followed by after diode D1
Ground, has been also coupled to be grounded after resistance R7, the inverting input of the operational amplifier U2 be coupled with the resistance R9 that is serially connected and
Operational amplifier U1 output end is coupled to after diode D2, the inverting input has been also coupled to resistance R8 and has been coupled to operation amplifier
Device U2 output end, the in-phase input end of the operational amplifier U2, which is coupled with after resistance R10, to be grounded, and has been also coupled to diode D3
Operational amplifier U1 output end is coupled to afterwards；
Switching tube G, switching tube G has first end, the second end and control end, and the control end is coupled with coupling after electric capacity R6
Operational amplifier U2 output end is connected to, first end is coupled to after being also coupled to the electric capacity C3 and resistance R5 that are serially connected, it is described
Second end is grounded, and the inverting input that switching tube G first end is also coupled to after resistance R3 with operational amplifier U1 is coupled；
Interface circuit 21, the interface circuit 21 is coupled to operational amplifier U1 output end, is further coupled to foreign channels,
For the sine wave signal of operational amplifier U1 output end output to be output in foreign channels, due to existing radio communication
The signal of communication used is to use data signal, if thus signal generator send be data signal if, just hold very much
Produced blurring when easily with primary user's busy channel, whether it is inquiry letter that such one side primary user can not distinguish
Number, cause primary user can not feed back signal to perception user well, therefore in the present embodiment using output sine wave signal
Mode, would not with channel signal of communication produce obscure, such primary user just can timely and effectively carry out reacting,
During the output sine wave of signal generating circuit 2, operational amplifier U1 first and operational amplifier U2 will work, computing
Amplifier U1 will produce self-oscillation with electric capacity C1, resistance R1, resistance R2, electric capacity C2 and resistance R4 mating reaction, so
Afterwards by operational amplifier U2 feedback effect, by the oscillator signal feedback meeting operational amplifier U1 of output so that operation amplifier
The free-run oscillation signal of device U1 final outputs is converted into sine wave signal, and passes through switching tube G setting, it is possible to put computing
Big device U2 feedback changes into the feed back input of data signal in operational amplifier U1 inverting input, such operation amplifier
Device U1 will adjust the self-excitation output of oneself according to this data signal, thus can effectively export a sine wave signal
, and here by switching tube G setting, it is possible to use switching tube G switching characteristic, with electric capacity C3 and resistance R5 phase interworkings
Close, the effect of a filtering can be carried out to the signal that operational amplifier U2 is exported, it is ensured that operational amplifier U2 feedback signal
It can more accurately enter in operational amplifier U1, and pass through the setting of interface circuit 21, it is possible to be effective by computing
The sine wave signal conversion of amplifier U1 outputs is input in foreign channels, realizes that one exports interrogation signal to primary well
The effect at family, such primary user just can preferably react, behind obtain energy threshold accuracy it is higher.
As a kind of improved embodiment, the interface circuit 21 includes：
Wave filter 211, is coupled to operational amplifier U1 output end, to export operational amplifier U1 output end
Sine wave is exported after being filtered；
Wireless signal transmitter 212, is coupled to wave filter 211, for the filtered sine wave of receiving filter 211 letter
Number, and sine wave signal is converted into wireless signal be output in foreign channels, the mode of existing cognitive communications is all in nothing
Applied in gauze network, thus interface circuit 21 is arranged to wave filter 211 and wireless signal transmitter 212 herein, passed through
The setting of wave filter 211, it is possible to effective that a filter action, filter are carried out to the sine wave signal that operational amplifier U1 is exported
The clutter on sine wave signal is removed, then passes through the setting of wireless signal transmitter 212, it is possible to will effectively be filtered out miscellaneous
The sine wave signal of ripple changes into wireless signal, so just can be good at realizing that an input interrogation signal, in channel, is asked
Ask the effect that whether takes of primary user, this just can effectively ensure the accuracy of the energy threshold got, so compared to
In the prior art by the way of predetermined threshold value, accuracy is higher, can preferably perceive idle channel.
As a kind of improved embodiment, the shell 1 includes upper shell 11 and lower house 12, the upper shell
It is detachably connected between 11 and lower house 12, forms the accommodating chamber of a receiving signal generating circuit 2, the upper casing each other
The side of the dorsad lower house 12 of body 12 is provided with antenna 3, and the antenna 3 coupled with wireless signal transmitter 212, and the antenna 3 is wrapped
Include signal emitter 31 and signal enhancing body 32, the signal enhancing body 32 is fixed on the side of upper shell 11, the letter
Number emitter 31 is fixed on signal enhancing body 32, and the signal emitter 31 is coupled with wireless signal transmitter 212, the letter
Number emitter 31 includes transmitting mobile jib 311 and some transmitting poles 312, one end of the transmitting mobile jib 311 and upper shell 11
Side be fixedly connected, also coupled with wireless signal transmitter 212, one end of some poles 312 is each attached to mobile jib 311 and carried on the back
To one end of upper shell 11, dorsad mobile jib 311 is set the other end in outside emitting shape, and the signal enhancing body 32 is one piece and carried
The aluminium sheet of concave surface, the mobile jib 311 is connected to aluminium sheet relative to the other end of pole 312 and sets side with concave surfaces, the aluminium sheet
Dorsad the side of concave surface is set towards upper shell 11, by the setting for launching mobile jib 311 and transmitting pole 312, it is possible to effectively
Compiled sine wave wireless signal is outwards spread out, and use divergence form to launch the setting of pole 312, it becomes possible to real
The scope of existing sine wave wireless signal extension is wider, and by the setting of signal enhancing body 32, can launch transmitting pole 312
Wireless signal out utilizes the characteristic that aluminium sheet reflects, and the signal launched to upper shell 11 is concentrated and reflected away, thus not
It is the direction for being transmitted into upper shell 11 that part signal, which occurs, causes the problem of wireless signal utilization rate is reduced, is so just not required to
Energy resource consumption is excessive caused by amplitude for the use of the circuit to strengthen wireless signal, or during amplification signal is lost
Genuine problem.
As a kind of improved embodiment, the signal receiver includes housing and the reception being arranged in housing
Circuit 4, the receiving circuit 4 includes：
Reception antenna 41, for being communicated with foreign channels, receives the wireless feedback signal that primary user sends, and be converted into electricity
Exported after signal, wherein, there is channel number and feedback information in wireless feedback signal；
Bandpass filter 42, coupling and reception antenna 41, the electric signal exported for reception antenna 41, and electric signal is entered
Exported after row bandpass filtering；
Writing circuit 43, is stored with channel number, is coupled to bandpass filter 42, is further coupled to reception antenna 41,
For reception bandpass filter 42 export electric signal and reception antenna output signal numbering, by the electric signal received according to
Channel number is recorded, and passes through the setting of reception antenna 41, it is possible to is effectively received wireless feedback signal, and is passed through band
The setting of bandpass filter 42, it is possible to which the effective signal to receiving carries out an effect filtered, just can so use
The feedback for whether having primary user inside the received signal of a detection is effectively realized in the filter action of bandpass filter 42
The effect of signal, is achieved in that and just very facilitates, and by the setting of writing circuit 43, just can effectively realize by
The channel for having primary user's feedback signal is effectively recorded, and this makes it possible to well by step 3 by the letter recorded
Channel energy corresponding to road is added in formula and calculated, and so just can be good at realizing what an energy threshold updated
Effect, implements simple and convenient, realizes the effect of a dynamic threshold, greatly add energy while recording detection process
Threshold value differentiates the accuracy of primary user's busy channel and idle channel, reception antenna 41, band wherein used in the present embodiment
Bandpass filter 42 is prior art, and writing circuit 43 is then existing storage circuit.
In summary, the detection method of the present embodiment, by the setting of step one, can effectively collect channel energy
Amount, and channel is classified according to energy threshold, and the setting for passing through step 2, it is possible to by setting a signal to send out
The channel that raw device sends interrogation signal to judge high-energy now is that primary user is taking, and is laid to calculate energy threshold
Basis, and the effect that energy threshold updates and used just can effectively be calculated by the setting of step 3 and step 4,
The effect of a dynamic power threshold value so is realized, compared to default mode is used in the prior art, accuracy is higher.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of cognitive radio frequency spectrum detection method, it is characterised in that：Comprise the following steps：
Step one, the energy on each channel on existing frequency spectrum is gathered, while presetting an energy threshold, channel is adopted according to it
The energy collected compared with energy threshold after classify, be divided into high-energy channel and low energy channel；
Step 2, sets one to be used to send the signal generator of interrogation signal, using signal generator send interrogation signal to
In high-energy channel, while setting a signal receiver to be used to receive the response signal that primary user sends；
Step 3, the signal received according to signal receiver selects the channel for sending response signal, is defined as primary user and takes letter
Road, while extracting the energy value corresponding to primary user's busy channel, and updates default energy threshold according to below equation, public
Formula is as follows：
<mrow>
<mi>X</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>a</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>a</mi>
<mn>2</mn>
</msub>
<mo>+</mo>
<mo>...</mo>
<mo>.</mo>
<mo>+</mo>
<msub>
<mi>a</mi>
<mi>N</mi>
</msub>
</mrow>
<mi>N</mi>
</mfrac>
<mo>;</mo>
</mrow>
Wherein, X is the energy threshold after updating, a1、a2。。。。aNFor the 1st to N high-energy channels, N compiles for the quantity of channel
Number；
Step 4, using the energy threshold updated in step 3 as judge primary user whether the energy threshold of busy channel, carry out
Frequency spectrum perception, and return to step one detects the energy on channel again.
2. cognitive radio frequency spectrum detection method according to claim 1, it is characterised in that：Used in the step 2
Signal generator include shell (1) and the signal generating circuit (2) that is arranged in shell (1), the signal generating circuit (2)
Including：
Operational amplifier U1, the operational amplifier U1 in-phase input end are coupled with after electric capacity C1 and are grounded, and have been also coupled to resistance R1
After be grounded, the output end of the operational amplifier U1 is used to export sine wave, and is coupled with the electric capacity C2 and resistance being serially connected
Its in-phase input end is coupled to after R2, the inverting input of the operational amplifier U1, which is coupled with after resistance R4, is coupled to output
End；
Operational amplifier U2, the operational amplifier U2 output end reversal connection, which have to be coupled with after diode D1 after electric capacity C4, to be grounded, also
It is coupled with after resistance R7 and is grounded, the inverting input of the operational amplifier U2 is coupled with the resistance R9 and diode being serially connected
Operational amplifier U1 output end is coupled to after D2, the inverting input is also coupled to resistance R8 and is coupled to operational amplifier U2's
Output end, the in-phase input end of the operational amplifier U2, which is coupled with after resistance R10, to be grounded, and has been also coupled to couple after diode D3
In operational amplifier U1 output end；
Switching tube G, switching tube G has first end, the second end and control end, and the control end is coupled to after being coupled with electric capacity R6
Operational amplifier U2 output end, first end, described second are coupled to after being also coupled to the electric capacity C3 and resistance R5 that are serially connected
End ground connection, the inverting input that switching tube G first end is also coupled to after resistance R3 with operational amplifier U1 is coupled；
Interface circuit (21), the interface circuit (21) is coupled to operational amplifier U1 output end, is further coupled to foreign channels,
For the sine wave signal of operational amplifier U1 output end output to be output in foreign channels.
3. cognitive radio frequency spectrum detection method according to claim 2, it is characterised in that：Interface circuit (21) bag
Include：
Wave filter (211), is coupled to operational amplifier U1 output end, operational amplifier U1 output end to be exported just
String ripple is exported after being filtered；
Wireless signal transmitter (212), is coupled to wave filter (211), for the filtered sine wave letter of receiving filter (211)
Number, and sine wave signal is converted into wireless signal be output in foreign channels.
4. cognitive radio frequency spectrum detection method according to claim 3, it is characterised in that：The shell (1) includes upper
Housing (11) and lower house (12), are detachably connected between the upper shell (11) and lower house (12), form one each other
It is individual accommodate signal generating circuit (2) accommodating chamber, the upper shell (12) dorsad lower house (12) side be provided with antenna (3),
The antenna (3) couples with wireless signal transmitter (212), and the antenna (3) includes signal emitter (31) and signal enhancing
Body (32), the signal enhancing body (32) is fixed on the side of upper shell (11), and the signal emitter (31) is fixed on
On signal enhancing body (32), the signal emitter (31) couples with wireless signal transmitter (212), the signal emitter
(31) transmitting mobile jib (311) and some transmitting poles (312), one end of the transmitting mobile jib (311) and upper shell are included
(11) side is fixedly connected, and is also coupled with wireless signal transmitter (212), one end of some poles (312) is each attached to
One end of mobile jib (311) dorsad upper shell (11), dorsad mobile jib (311) is set the other end in outside emitting shape, and the signal increases
Strong body (32) is for one piece with aluminium sheet with concave surfaces, and the mobile jib (311) is connected to aluminium sheet relative to the other end of pole (312) and set
Side with concave surfaces, the aluminium sheet dorsad concave surface side towards upper shell (11) set.
5. the cognitive radio frequency spectrum detection method according to Claims 1-4 any one, it is characterised in that：The letter
Number receiver includes housing and the receiving circuit (4) being arranged in housing, and the receiving circuit (4) includes：
Reception antenna (41), for being communicated with foreign channels, receives the wireless feedback signal that primary user sends, and be converted into telecommunications
Exported after number, wherein, there is channel number and feedback information in wireless feedback signal；
Bandpass filter (42), coupling and reception antenna (41), the electric signal exported for reception antenna (41), and by electric signal
Exported after bandpass filtering；
Writing circuit (43), is stored with channel number, is coupled to bandpass filter (42), is further coupled to reception antenna
(41) the signal numbering of electric signal and the reception antenna output, exported for reception bandpass filter (42), by the electricity received
Signal is recorded according to channel number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504729.6A CN107332633B (en) | 2017-06-27 | 2017-06-27 | Cognitive radio frequency spectrum detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504729.6A CN107332633B (en) | 2017-06-27 | 2017-06-27 | Cognitive radio frequency spectrum detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107332633A true CN107332633A (en) | 2017-11-07 |
| CN107332633B CN107332633B (en) | 2020-07-31 |
Family
ID=60198245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710504729.6A Active CN107332633B (en) | 2017-06-27 | 2017-06-27 | Cognitive radio frequency spectrum detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107332633B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769364A (en) * | 2019-10-16 | 2020-02-07 | 广东美嘉欣创新科技股份有限公司 | Unmanned aerial vehicle flight data and image transmission system |
| US20220052805A1 (en) * | 2020-08-11 | 2022-02-17 | Qualcomm Incorporated | Dynamic operating channel bandwidths with adjusted thresholds |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103202085A (en) * | 2011-01-03 | 2013-07-10 | Lg电子株式会社 | Channel sounding method in wireless local area network system and apparatus for supporting the same |
| US20150109947A1 (en) * | 2013-10-18 | 2015-04-23 | Research & Business Foundation Sungkyunkwan University | Spectrum sensing apparatus and method for cooperative cognitive radio network in non-gaussian noise environment, and fusion center apparatus and cooperative cognitive radio system using the same |
| CN106170139A (en) * | 2016-09-21 | 2016-11-30 | 北京邮电大学 | A kind of frequency spectrum detecting method and system |
-
2017
- 2017-06-27 CN CN201710504729.6A patent/CN107332633B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103202085A (en) * | 2011-01-03 | 2013-07-10 | Lg电子株式会社 | Channel sounding method in wireless local area network system and apparatus for supporting the same |
| US20150109947A1 (en) * | 2013-10-18 | 2015-04-23 | Research & Business Foundation Sungkyunkwan University | Spectrum sensing apparatus and method for cooperative cognitive radio network in non-gaussian noise environment, and fusion center apparatus and cooperative cognitive radio system using the same |
| CN106170139A (en) * | 2016-09-21 | 2016-11-30 | 北京邮电大学 | A kind of frequency spectrum detecting method and system |
Non-Patent Citations (2)
| Title |
|---|
| YIXIAN LIU等: "《Energy detection threshold optimization for cooperative spectrum sensing》", 《2010 2ND INTERNATIONAL CONFERENCE ON ADVANCED COMPUTER CONTROL》 * |
| 蒋富等: "《一种分布式协同优化的认知无线电网络频谱检测算法》", 《铁道学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769364A (en) * | 2019-10-16 | 2020-02-07 | 广东美嘉欣创新科技股份有限公司 | Unmanned aerial vehicle flight data and image transmission system |
| CN110769364B (en) * | 2019-10-16 | 2020-12-18 | 广东美嘉欣创新科技股份有限公司 | Unmanned aerial vehicle flight data and image transmission system |
| US20220052805A1 (en) * | 2020-08-11 | 2022-02-17 | Qualcomm Incorporated | Dynamic operating channel bandwidths with adjusted thresholds |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107332633B (en) | 2020-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9425905B2 (en) | Receiver for body channel communication and a method of operating a receiver therefrom | |
| CN109194365A (en) | A kind of two-dimensional pattern modulation frequency-hopping communication method | |
| US10992337B2 (en) | High-order PSK signaling (HOPS) techniques for low-power spread spectrum communications | |
| CN106375023B (en) | A kind of sound wave communication method and system based on multi-system chirp-rate keying modulation | |
| CN107332633A (en) | A kind of cognitive radio frequency spectrum detection method | |
| CN108880699A (en) | A kind of underwater acoustic digital speed communication system and method under Quick moving platform | |
| CN109412632B (en) | A kind of high-speed frequency-hopping transmitting-receiving communication device based on distortion adaptive | |
| CN107872271A (en) | Public network communication relays and communication means based on LoRa technologies | |
| CN100365940C (en) | Tourist communication device and its communication method | |
| CN106033996B (en) | The monitoring device and receiver of optical signal to noise ratio | |
| CN202979011U (en) | Group multiuser underwater acoustic communication Modem | |
| CN105162525A (en) | Novel system and method for transmitting data to mobile phone through sub-ultrasonic wave | |
| CN107222441B (en) | Novel differential chaos keying communication method | |
| CN109286985B (en) | Signal optimization method and system for multi-carrier signal energy simultaneous transmission system | |
| CN110213762A (en) | Untrusted junction network safe transmission method is acquired based on opportunistic wireless energy | |
| CN109443520A (en) | A kind of noise testing real-time data transmission device | |
| Wu et al. | Relay-based cooperative spectrum sensing framework under imperfect channel estimation | |
| CN106455136A (en) | Dual-channel passive wireless sensor system based on radio frequency power supplying | |
| KR102354618B1 (en) | Method for transmitting data by radiofrequency link in a remote-reading apparatus | |
| CN107484114A (en) | The matching method and system of bluetooth equipment | |
| CN206226433U (en) | A kind of capacitively coupled human body communication transceiver aided design apparatus | |
| CN205901735U (en) | Power line carrier communication device suitable for printer | |
| CN103067106B (en) | Radio concealment monitoring method and portable radio monitoring system | |
| CN206490678U (en) | Digital radio interferometer | |
| KR20100120041A (en) | Apparatus and method for transmitting data of low-frequency band in human body communication system and the system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325000 Wenzhou City National University Science Park incubator, No. 38 Dongfang South Road, Ouhai District, Wenzhou, Zhejiang Patentee after: Wenzhou Institute of Technology Address before: 325000 Wenzhou City National University Science Park incubator, No. 38 Dongfang South Road, Ouhai District, Wenzhou, Zhejiang Patentee before: WENZHOU UNIVERSITY OUJIANG College |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240101 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 325000 Wenzhou City National University Science Park incubator, No. 38 Dongfang South Road, Ouhai District, Wenzhou, Zhejiang Patentee before: Wenzhou Institute of Technology |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240307 Address after: 430000, Building B, Huitong Tiandi, No. 6 Xudong Street, Wuchang District, Wuhan City, Hubei Province, China. Building B, 8th Floor, Unit 3, Jiangzhidu Creative Space-A112 Patentee after: Wuhan Chengle Technology Co.,Ltd. Country or region after: China Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Country or region before: China |