CN104202101B - A kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method - Google Patents
A kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method Download PDFInfo
- Publication number
- CN104202101B CN104202101B CN201410455210.XA CN201410455210A CN104202101B CN 104202101 B CN104202101 B CN 104202101B CN 201410455210 A CN201410455210 A CN 201410455210A CN 104202101 B CN104202101 B CN 104202101B
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- spectrum
- switch
- radio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Circuits Of Receivers In General (AREA)
Abstract
The invention belongs to shortwave/ultrashort wave frequency spectrum detection analysis technical field, particularly to a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method.This shortwave/ultrashort wave instant dynamic spectrum detecting system, including: radio-frequency (RF) switch, spectrum analysis display module, for receiving the ultrashort wave antenna of ultrashort wave signals and for receiving the short-wave antenna of short-wave signal；Described radio-frequency (RF) switch is single-pole double-throw switch (SPDT), described radio-frequency (RF) switch is provided with first input end, the second input, outfan and controls end, the control of described radio-frequency (RF) switch terminates into radio frequency switch controlling signal, the first input end electrical connection ultrashort wave antenna of described radio-frequency (RF) switch, second input electrical connection short-wave antenna of described radio-frequency (RF) switch, the input of the outfan electrical connection spectrum analysis display module of described radio-frequency (RF) switch.
Description
Technical field
The invention belongs to shortwave/ultrashort wave frequency spectrum detection analysis technical field, particularly to a kind of shortwave/ultrashort
Ripple instant dynamic spectrum detecting system and method.
Background technology
Owing to the most various existing noises, interference are more and more, cause existing shortwave/ultrashort
Ripple radio station is faced with the electromagnetic environment that the most any moment will be complicated in actual use, often cannot
The very first time finds reliably, matter measured communication frequency.Analyze in existing shortwave/ultrashort wave frequency spectrum detection
In method, shortwave spectrum and ultrashort wave frequency spectrum need individually to detect analysis, and generally at radio-frequency front-end
Make spectrum analysis, signal carried out signal that frequency spectrum detection analysis causes being able to detect that at radio-frequency front-end
The most limited (i.e. poor sensitivity), resolution are low.
Summary of the invention
It is an object of the invention to propose a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method.
For realizing above-mentioned technical purpose, the present invention adopts the following technical scheme that and is achieved.
Technical scheme one:
A kind of shortwave/ultrashort wave instant dynamic spectrum detecting system, including: radio-frequency (RF) switch, spectrum analysis show
Show module, for receiving the ultrashort wave antenna of ultrashort wave signals and for receiving the shortwave of short-wave signal
Antenna；
Described radio-frequency (RF) switch is single-pole double-throw switch (SPDT), described radio-frequency (RF) switch be provided with first input end, second
Input, outfan and control end, the control of described radio-frequency (RF) switch terminates to be believed into radio frequency on-off control
Number, the first input end electrical connection ultrashort wave antenna of described radio-frequency (RF) switch, the second of described radio-frequency (RF) switch is defeated
Entering end electrical connection short-wave antenna, the outfan of described radio-frequency (RF) switch electrically connects the defeated of spectrum analysis display module
Enter end.
The feature of the technical program and further improvement is that:
Described a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system, also includes ultra-short wave receiver, institute
State ultrashort wave antenna and electrically connected the first input end of described radio-frequency (RF) switch by described ultra-short wave receiver；
The input of described ultra-short wave receiver is electrically connected with ultrashort wave antenna；Described ultra-short wave receiver bag
Include be sequentially connected electrically the first frequency-selecting filter, low-noise amplifier, tuning filtering device, the first frequency mixer,
Second frequency-selecting filter, the first intermediate frequency amplifier, the first attenuator, the second frequency mixer, the second intermediate frequency are put
Big device, band filter and the first controllable gain amplifier, the input of described first frequency-selecting filter
End electrically connects described ultrashort wave antenna, and the local oscillator input of described first frequency mixer accesses the first local oscillation signal,
The local oscillator input of described second frequency mixer accesses the second local oscillation signal；It is provided with on described first attenuator
For controlling the first automatic gain control circuit of the first attenuator attenuation, described first controllable gain is put
The second automatic growth control electricity of gain for controlling the first controllable gain amplifier it is provided with on big device
Road；The outfan of described first controllable gain amplifier electrically connects the first input end of described radio-frequency (RF) switch,
The display of described frequency spectrum is analyzed module and is electrically connected the gain parameter outfan of the first automatic gain control circuit
Gain parameter outfan with the second automatic gain control circuit.
Described spectrum analysis display module includes that intermediate frequency spectrum analyzes module；Described intermediate frequency spectrum analyzes module
Connect including the RF digitization being changed into digital baseband signal for intermediate frequency spectrum being analyzed module input signal
Receive unit and for showing that intermediate frequency spectrum analyzes module input signal spectrum and the frequency spectrum perception of energy value
Unit；Described intermediate frequency spectrum analyze module input signal be intermediate frequency spectrum analyze module receive from radio frequency
The signal of switch；Described digitalization receiving subsystem at RF unit includes: the second attenuator of being sequentially connected in series,
Under second controllable gain amplifier, low pass filter, analog-digital converter, digital signal frequency mixer, numeral
Converter and demodulator；It is provided with for controlling the second controllable gain on described second controllable gain amplifier
3rd automatic gain control circuit of the gain of amplifier；The input electrical connection of described second attenuator is penetrated
The outfan of frequency switch；The input of described frequency spectrum perception unit is electrically connected the 3rd automatic growth control
The gain parameter outfan of circuit and the outfan of demodulator；
Described spectrum analysis display module includes: join for the gain according to the first automatic gain control circuit
Number, the gain parameter of the second automatic gain control circuit and intermediate frequency spectrum analyze module input signal frequency
Spectrum and energy value, draw the integrated treatment unit of short-wave signal spectrum information or ultrashort wave signals spectrum information,
The outfan of described frequency spectrum perception unit electrically connects the input of described integrated treatment unit；Described shortwave is believed
Number spectrum information includes frequency spectrum and the energy value of described short-wave signal of described short-wave signal, described ultrashort wave
Signal spectrum information includes frequency spectrum and the energy value of described ultrashort wave signals of described ultrashort wave signals；
Described spectrum analysis display module also includes for showing short-wave signal spectrum information or ultrashort wave signals
The technical grade panel computer of spectrum information, the input electrical connection of described technical grade panel computer is described comprehensively
The outfan of processing unit.
The radio-frequency (RF) switch control signal output controlling end electrical connection integrated treatment unit of described radio-frequency (RF) switch
End.
Technical scheme two:
A kind of shortwave/ultrashort wave instant dynamic spectrum detection method, dynamic based on above-mentioned shortwave/ultrashort wave
Frequency spectrum detection system, comprises the following steps:
S1: ultrashort wave reception antenna receives ultrashort wave signals, and short-wave receiving antenna receives short-wave signal simultaneously,
And the short-wave signal received is sent the second input to radio-frequency (RF) switch；Ultrashort wave reception antenna is by ultrashort
Ripple signal sends to the first frequency-selecting filter, and the first frequency-selecting filter carries out frequency-selective filtering to ultrashort wave signals,
And the signal after frequency-selective filtering is sent to low-noise amplifier；After low-noise amplifier is to frequency-selective filtering
Signal is amplified, and sends amplified signal to tuning filtering device；Reception is put by tuning filtering device
After big, signal is tuned filtering, and sends signal after tuning filtering to the first frequency mixer；First mixing
Signal after tuning filtering and the first local oscillation signal are mixed by device, and the intermediate-freuqncy signal that will generate after mixing
Send to the second frequency-selecting filter；Second frequency-selecting filter carries out frequency-selecting to the intermediate-freuqncy signal generated after mixing
Filtering, and the intermediate-freuqncy signal after frequency-selective filtering is sent to the first intermediate frequency amplifier；First intermediate frequency amplifier
Intermediate-freuqncy signal after frequency-selective filtering is amplified, and will amplify after intermediate-freuqncy signal send to first decay
Device；Intermediate-freuqncy signal after amplifying is carried out under the control of the first automatic gain control circuit by the first attenuator
Decay, and the intermediate-freuqncy signal through attenuation processing is sent to the second frequency mixer；First automatic growth control electricity
Road is while the intermediate-freuqncy signal after amplifying is decayed by control the first attenuator, by the first automatic gain
The gain parameter of control circuit sends to integrated treatment unit；Described second frequency mixer is receiving through decay
After the intermediate-freuqncy signal processed, it is mixed by intermediate-freuqncy signal and the second local oscillation signal through attenuation processing,
And the intermediate-freuqncy signal after mixing is sent to the second intermediate frequency amplifier；After second intermediate frequency amplifier is to mixing
Intermediate-freuqncy signal is amplified, and will amplify after intermediate-freuqncy signal send to band filter；Band filter
Intermediate-freuqncy signal after amplifying is filtered, and filtered intermediate-freuqncy signal is sent to the first controllable gain
Amplifier；First controllable gain amplifier under the control of the second automatic gain control circuit to filtered
Intermediate-freuqncy signal is amplified, and the intermediate-freuqncy signal output after amplifying is to the first input end of radio-frequency (RF) switch；
Filtered intermediate-freuqncy signal is carried out by the second automatic gain control circuit at control the first controllable gain amplifier
While amplification, the gain parameter of the second automatic gain control circuit is sent to integrated treatment unit；
Radio-frequency (RF) switch, under the control of radio-frequency (RF) switch control signal, optionally receives short-wave signal or first
The intermediate-freuqncy signal of controllable gain amplifier output, the signal received is sent to the second attenuator by radio-frequency (RF) switch；
The transmission of S2: radio-frequency (RF) switch is that intermediate frequency spectrum analyzes module input signal to the signal of the second attenuator,
Second attenuator is after receiving intermediate frequency spectrum analysis module input signal, and centering frequency spectrum analysis module is defeated
Enter signal and carry out attenuation processing, and the signal through attenuation processing is sent to the second controllable gain amplifier；
Second controllable gain amplifier is under the control of the 3rd automatic gain control circuit, to the letter through attenuation processing
Number it is amplified, and the signal after amplifying sends to low pass filter；3rd automatic gain control circuit
While control the second controllable gain amplifier carries out signal amplification, by the 3rd automatic gain control circuit
Gain parameter send to frequency spectrum perception unit；After low pass filter signal after receiving amplification,
Signal after amplifying is carried out low-pass filtering, and signal after low-pass filtering is sent to analog-digital converter；Mould
Number converter carries out analog digital conversion to signal after low-pass filtering, and sends the digital signal generated to numeral
Signal mixer；Digital signal and the local oscillation signal of reception are carried out Frequency mixing processing by digital signal frequency mixer,
And the digital signal after mixing is sent to digital down converter；Digital down converter is to the number after mixing
Word signal carries out down-converted, and sends the digital signal after down-converted to demodulator；Demodulation
Digital signal after down-converted is demodulated processing by device, obtains digital baseband signal, and demodulator will
The local carrier frequency used when digital baseband signal and demodulation sends to frequency spectrum perception unit；
S3: the basis used when described frequency spectrum perception unit is demodulated according to digital baseband signal, demodulator
Ground carrier frequency and the gain parameter of the 3rd automatic gain control circuit, show that described intermediate frequency spectrum is divided
Analysis module input signal spectrum and energy value；The intermediate frequency spectrum drawn is analyzed mould by described frequency spectrum perception unit
Block input signal spectrum and energy value send to integrated treatment unit；
S4: described integrated treatment unit according to the gain parameter of the first automatic gain control circuit, second from
Gain parameter and the intermediate frequency spectrum of dynamic gain control circuit analyze module input signal spectrum and energy value,
Show that short-wave signal spectrum information or ultrashort wave signals spectrum information, described short-wave signal spectrum information include
The frequency spectrum of described short-wave signal and the energy value of described short-wave signal, described ultrashort wave signals spectrum information bag
Include frequency spectrum and the energy value of described ultrashort wave signals of described ultrashort wave signals；
The short-wave signal spectrum information drawn or ultrashort wave signals spectrum information are sent out by described integrated treatment unit
Deliver to technical grade panel computer, technical grade computer display short-wave signal spectrum information or ultrashort wave signals frequency spectrum
Information.
The feature of the technical program and further improvement is that:
Described ultra-short wave receiver also includes that the frequency for generating the first local oscillation signal and the second local oscillation signal closes
Unit, described frequency closes unit and has input, the first outfan and the second outfan, and described frequency closes unit
Input electrical connection integrated treatment unit outfan, described frequency close unit first outfan electrical connection
The local oscillator input of the first frequency mixer, described frequency closes the second outfan of unit and electrically connects the second frequency mixer
Local oscillator input；
In step sl, described integrated treatment unit generates frequency control word, and is sent by frequency control word
Unit is closed to frequency；Described frequency closes unit and generates the first local oscillation signal and the second local oscillator letter according to frequency control word
Number；Described frequency closes unit and sends the first local oscillation signal to the first frequency mixer, and described split unit is by second
Local oscillation signal sends to the second frequency mixer.
Described step S3 specifically includes following sub-step:
S31: digital baseband signal represents that s, the plural form of digital baseband signal s are: s=i+jq, its
In, i represents the real part of digital baseband signal s, and q represents the imaginary part of digital baseband signal s；Frequency spectrum perception list
Unit receiving digital baseband signal s, demodulator use when being demodulated local carrier frequency, Yi Ji
After the gain parameter of three automatic gain control circuits, digital baseband signal s is carried out Fourier transformation, Fu
In the procedural representation of leaf transformation be:
FFT [s]=FFT [i+jq]=I (n)+jQ (n)
Wherein, FFT [] expression carries out Fourier transformation, and I (n) represents that digital baseband signal s carries out Fourier transformation
The real part of gained frequency-region signal, Q (n) represents that word baseband signal s carries out Fourier transformation gained frequency-region signal
Imaginary part, n represents Frequency point；N is integer and 0≤n≤N-1, and N is counting of Fourier transformation；
The energy value P of digital frequency space corresponding for digital baseband signal s is drawn according to below equatione(n):
Pe(n)=10log10[I2(n)+Q2(n)]
S32: set a radio-frequency signal source output energy value Psl；According to initial time the 3rd automatic gain
Gain parameter AGC3 of control circuit, draws the gain at initial time of second controllable gain amplifier
F (AGC3), initial time was designated as 0 moment；
S32: find out the energy value P of digital frequency space corresponding for initial time digital baseband signal seIn (n)
Maximum Pe(ni), Pe(ni)=max [Pe(n)], max [] expression takes maximum, niFor integer and
0≤ni≤N-1；
S33: show that the intermediate frequency spectrum that each Frequency point of initial time is corresponding analyzes module according to below equation defeated
Enter the energy value of signal, initial time Frequency point njCorresponding radio frequency energy value P (nj) it is:
P(nj)=Psl+ΔPe
Wherein, Δ Pe=Pe(nj)-Pe(ni), njFor integer and 0≤nj≤ N-1, Pe(nj) represent initial time number
The digital frequency space medium frequency point n that word baseband signal s is correspondingjThe energy value at place；
S34: arrange integer variable m=1,2..., according to the gain of m moment the 3rd automatic gain control circuit
Parameter AGC3m, draw the second controllable gain amplifier gain f (AGC3 in the m momentm)；When drawing m
Carve the energy value P of digital frequency space corresponding for digital baseband signal semMaximum P in (n)em(nm),
Pem(nm)=max [Pem(n)], max [] expression takes maximum, nmFor integer and 0≤nm≤N-1；
Then m moment Frequency point n is drawn according to below equationmThe intermediate frequency spectrum analysis module input that place is corresponding
Energy value P (the n of signalm) it is:
P(nm)=Psl+ΔPem+Δf(AGC)m,
Wherein, Δ Pem=Pem(nm)-Pe(ni), Δ f (AGC)m=f (AGC3m)-f(AGC3)；
Show that intermediate frequency spectrum corresponding at m moment each Frequency point analyzes module input letter according to below equation
Number energy value, intermediate frequency spectrum corresponding at m moment Frequency point n analyzes the energy value of module input signal
P (n) is: P (n)=P (nm)+ΔPem', Δ Pem'=Pem(n)-Pem(nm), PemN () is m moment numeral
The energy value at digital frequency space medium frequency point n that baseband signal s is corresponding；N be integer and
0≤n≤N-1；
S35: local carrier frequency c used when utilizing m moment demodulator to be demodulatedm, draw the m moment
The intermediate frequency spectrum that each Frequency point is corresponding analyzes the frequency of module input signal, and m moment Frequency point n is corresponding
It is f that intermediate frequency spectrum analyzes the frequency of module input signalnm,Wherein, fsRepresent sampling
Frequency.
In step sl, described integrated treatment unit generates frequency control word, and is sent by frequency control word
Unit is closed to frequency；Described frequency closes unit and generates the first local oscillation signal and the second local oscillator letter according to frequency control word
Number；Described frequency closes unit and sends the first local oscillation signal to the first frequency mixer, and described split unit is by second
Local oscillation signal sends to the second frequency mixer；
In step sl, integrated treatment unit generates radio-frequency (RF) switch control signal, then sends out to radio-frequency (RF) switch
Send radio-frequency (RF) switch control signal；
In step sl, the shortwave letter from short-wave antenna is received when integrated treatment unit controls radio-frequency (RF) switch
Number time, it is short-wave signal that the intermediate frequency spectrum of step S3 analyzes module input signal, thus, in step S3
In, draw described short-wave signal spectrum information；In step s 4, integrated treatment unit receives described short
Ripple signal spectrum information, and described shortwave spectrum information is sent to technical grade panel computer；
In step sl, receive in ultra-short wave receiver when integrated treatment unit controls radio-frequency (RF) switch
Frequently, during signal, it is the intermediate frequency that ultra-short wave receiver sends that the intermediate frequency spectrum of step S3 analyzes module input signal
Signal, thus, in step s3, draw frequency spectrum and the energy value of described intermediate-freuqncy signal；In step S4
In, integrated treatment unit receives frequency spectrum and the energy value of described intermediate-freuqncy signal；In integrated treatment unit,
Draw energy value and the frequency of the ultrashort wave signals that m moment each Frequency point is corresponding, m moment Frequency point n pair
The energy value P of the ultrashort wave signals answeredsvhf,mnFor: Psvhf,mn=P (n)+fvhf,m(AGC1m,AGC2m), its
In, AGC1mRepresent the gain parameter of the first automatic gain control circuit, AGC2 described in the m momentmRepresent
The gain parameter of the second automatic gain control circuit, f described in the m momentvhf,m(AGC1m,AGC2m) represent m
The attenuation of moment the first attenuator and the gain sum of m moment the first controllable gain amplifier；
Frequency f of the ultrashort wave signals that m moment Frequency point n is correspondingvhf,mnFor
fvhf,mn=fnm+fsyn
Wherein, fsynRepresent the frequency control word that in step 1, integrated treatment unit generates.
The invention have the benefit that 1) reliable communication frequency can be provided for shortwave/ultrashort wave radio set；2)
The method using base band signal process, can be substantially reduced frequency spectrum perception unit resource requirement；3) there is high score
Resolution, high sensitivity, the feature of wide frequency range；4) present invention uses modularized design, each module phase
To independence, it is easy to debugging.
Accompanying drawing explanation
Fig. 1 is the first structural representation of a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system of the present invention
Figure；
Fig. 2 is the second circuit structural representation of the ultra-short wave receiver of the present invention；
Fig. 3 is the second structural representation of a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system of the present invention
Figure；
Fig. 4 is the electrical block diagram of the digitalization receiving subsystem at RF unit of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
With reference to Fig. 1, for the first knot of a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system of the present invention
Structure schematic diagram.This shortwave/ultrashort wave instant dynamic spectrum detecting system includes: radio-frequency (RF) switch, spectrum analysis
Display module (spectrum analyzer), it is used for receiving the super of ultrashort wave signals (frequency is 30～512MHz)
Short-wave antenna 1 and be used for receiving the short-wave antenna 2 of short-wave signal (frequency is 2～30MHz).
In the embodiment of the present invention, radio-frequency (RF) switch is single-pole double-throw switch (SPDT) (SPDT), and radio-frequency (RF) switch is provided with
First input end, the second input, outfan and control end, the control termination incidence of radio-frequency (RF) switch
Frequently switch controlling signal, the first input end electrical connection ultrashort wave antenna 1 of radio-frequency (RF) switch, the of radio-frequency (RF) switch
Two input electrical connection short-wave antennas 2, the outfan of radio-frequency (RF) switch electrically connects the defeated of spectrum analysis display module
Enter end.
Specifically, the present invention is additionally provided with ultra-short wave receiver.With reference to Fig. 2, the ultrashort wave for the present invention connects
The second circuit structural representation of receipts machine.Ultrashort wave antenna 1 is left by ultra-short wave receiver electrical connection radio frequency
The first input end closed.The input of ultra-short wave receiver is electrically connected with ultrashort wave antenna.Ultrashort wave receives
The first frequency-selecting filter that machine includes being sequentially connected electrically, low-noise amplifier (Low Noise Amplifier,
LNA), tuning filtering device, the first frequency mixer, the second frequency-selecting filter, the first intermediate frequency amplifier, first
Attenuator, the second frequency mixer, the second intermediate frequency amplifier, band filter and the first controllable gain are put
Big device (Variable Gain Amplifier, VGA), the input electrical connection of above-mentioned first frequency-selecting filter
Ultrashort wave antenna 1, the local oscillator input of the first frequency mixer accesses the first local oscillation signal, above-mentioned second frequency mixer
Local oscillator input access the second local oscillation signal；The first automatic growth control it is provided with on first attenuator
(Automatic Gain Control, AGC) circuit, for controlling the first attenuator attenuation.First can
It is provided with the second automatic gain control circuit on control gain amplifier, amplifies for controlling the first controllable gain
The gain of device.The first input end of the outfan electrical connection radio-frequency (RF) switch of the first controllable gain amplifier, frequently
Spectrum display is analyzed module and is electrically connected the gain parameter outfan and second of the first automatic gain control circuit
The gain parameter outfan of automatic gain control circuit.So, radio-frequency (RF) switch just can be in radio-frequency (RF) switch control
Under the control of signal processed, optionally receive the signal from short-wave antenna or ultra-short wave receiver.This
In bright embodiment, each frequency-selecting filter is for carrying out frequency-selective filtering, low noise amplification to the signal of input
Device, the first intermediate frequency amplifier, the second intermediate frequency amplifier and the first controllable gain amplifier are respectively used to defeated
The signal entered is amplified.Tuning filtering device is for being tuned filtering, each mixing to the signal of input
Device is for carrying out Frequency mixing processing by signal and the local oscillation signal of input, and the first attenuator is for the letter to input
Number decay, and band filter is for carrying out bandpass filtering to the signal of input, so, ultrashort wave
The ultrashort wave signals that receiver receives, after a series of process, exports through the first controllable gain amplifier
Intermediate-freuqncy signal (frequency is 21.4MHz).In the embodiment of the present invention, the second frequency-selecting filter is the filter of sound surface
Ripple device (Surface Acoustic Wave Filter, SAW).
In the embodiment of the present invention, ultra-short wave receiver also includes that (frequency is for generating the first local oscillation signal
1130MHz～1612MHz) and the frequency conjunction unit of the second local oscillation signal (frequency is 1078.6MHz), frequently
Closing unit and have input, the first outfan and the second outfan, frequency closes the input electrical connection of unit and combines
Closing the outfan of processing unit, the first outfan of frequency conjunction unit electrically connects the local oscillator input of the first frequency mixer
End, the second outfan of frequency conjunction unit electrically connects the local oscillator input of the second frequency mixer.The embodiment of the present invention
In, integrated treatment unit generates frequency control word, and is sent by frequency control word to frequency conjunction unit；Frequency closes
Unit generates the first local oscillation signal and the second local oscillation signal according to frequency control word；Frequency closes unit by first
The signal that shakes sends to the first frequency mixer, and above-mentioned frequency closes unit and sends the second local oscillation signal to the second frequency mixer.
Specifically, frequency closes unit and generates the first local oscillation signal according to frequency control word, then according to the first local oscillator
Signal and frequency control word generate the second local oscillation signal.Frequency control word uses synchronous serial interface host-host protocol to enter
Row transmission, each frequency control word comprises 4 frequency words, 8 bits of each frequency word, uses BCD
Coding.
With reference to Fig. 3, for the second knot of a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system of the present invention
Structure schematic diagram.In the embodiment of the present invention, spectrum analysis display module includes that intermediate frequency spectrum analyzes module.In
Frequently spectrum analysis module includes digitalization receiving subsystem at RF unit, for intermediate frequency spectrum is analyzed module input letter
Number it is changed into digital baseband signal.Intermediate frequency spectrum is analyzed module and is also included frequency spectrum perception unit, is used for drawing
Intermediate frequency spectrum analyzes module input signal spectrum and energy value.During intermediate frequency spectrum analysis module input signal is
Frequently the signal from radio-frequency (RF) switch that spectrum analysis module receives.In embodiments of the present invention, frequency spectrum perception
Unit is mainly used to detect local electromagnetic environment, finds out unoccupied or that interference is less frequency letter
Road, is not required to know the information of detected user in advance.In conjunction with the practical situations of the present invention, choosing
Using Energy-aware technology, this is due to when not knowing the enough information of primary user's signal, optimal spectrum
Cognitive method is exactly Energy-aware method.Frequency spectrum perception unit can be realized by fpga chip, FPGA
Chip can use the Cyclone III family chip of ALTERA company.
In the embodiment of the present invention, between ultrashort wave antenna and ultra-short wave receiver, use RF cable transmission super
Short-wave signal, uses RF cable transmission short-wave signal between short-wave antenna and radio-frequency (RF) switch, ultrashort wave connects
RF cable transmission intermediate frequency signal, radio-frequency (RF) switch and intermediate frequency spectrum analysis is used between receipts machine and radio-frequency (RF) switch
RF cable transmission signal is used between module.
With reference to Fig. 4, for the electrical block diagram of the digitalization receiving subsystem at RF unit of the present invention.RF digital
Change and receive unit and include: the second attenuator of being sequentially connected in series, the second controllable gain amplifier, low pass
Wave filter, analog-digital converter, digital signal frequency mixer, digital down converter and demodulator；Above-mentioned second
It is provided with the 3rd of the gain for controlling the second controllable gain amplifier on controllable gain amplifier automatically to increase
Benefit control circuit；The outfan of the input electrical connection radio-frequency (RF) switch of above-mentioned second attenuator；Frequency spectrum perception
The input of unit is electrically connected the gain parameter outfan of the 3rd automatic gain control circuit (in Fig. 4
It is not drawn into) and the outfan of demodulator.Second attenuator is used for decaying the signal of input, the
Two controllable gain amplifiers are for being amplified the signal of input, and low pass filter is in the signal to input
Carrying out low-pass filtering, analog-digital converter is used for being converted to the analogue signal of input the digital signal of correspondence,
Digital signal frequency mixer is for being mixed digital signal and the local oscillation signal of input, and demodulator is for right
The digital signal of input is demodulated.So, no matter digitalization receiving subsystem at RF unit receives short-wave signal
Or from the intermediate-freuqncy signal of ultra-short wave receiver, can say that the signal of input is changed into digital baseband signal.
The implementation of digitalization receiving subsystem at RF unit is exemplified below: the model of the second attenuator is
DAT-31R5, the second controllable gain amplifier by the audion that model is 3SK131 and model is
The operational amplifier composition of LMH6703, the model of analog-digital converter is AD9269, and digital signal is mixed
Device, digital down converter and demodulator are realized by fpga chip respectively, and fpga chip can use
The Cyclone III family chip of ALTERA company.Digital signal frequency mixer, digital down converter, solution
The function adjusting device and frequency spectrum perception unit can realize on the most same fpga chip.Especially, second declines
Subtracting device is numerical-control attenuator, and it controls end and is electrically connected with fpga chip, so, passes through fpga chip
The attenuation of the second attenuator can be controlled.
In the embodiment of the present invention, spectrum analysis display module includes: for according to the first automatic growth control
The gain parameter of circuit, the gain parameter of the second automatic gain control circuit and intermediate frequency spectrum analyze mould
Block input signal spectrum and energy value, draw short-wave signal spectrum information or ultrashort wave signals spectrum information
Integrated treatment unit, intermediate frequency spectrum is analyzed module input signal and is referred to short-wave signal or from ultra-short wave receiver
Intermediate-freuqncy signal.Input (the frequency spectrum sense of the outfan electrical connection integrated treatment unit of frequency spectrum perception unit
Know that unit, when integrated treatment unit sends data, uses MCBSP communication pattern to send out to integrated treatment unit
Send data).Short-wave signal spectrum information includes frequency spectrum and the energy of above-mentioned short-wave signal of above-mentioned short-wave signal
Value, ultrashort wave signals spectrum information includes frequency spectrum and the energy of above-mentioned ultrashort wave signals of above-mentioned ultrashort wave signals
Value.In the embodiment of the present invention, integrated treatment unit includes fpga chip and dsp chip, and it is main
Function includes the process to frequency spectrum data and the control to each module.Wherein, fpga chip is mainly responsible for meter
The digital processing that calculation amount is bigger, various communication interface and the realization of agreement.Dsp chip is mainly responsible for network interface
Communication controls function with part.
Explanation integrated treatment unit is to remaining element or the control of module and data interaction below:
1) by the synchronous serial interface of ultra-short wave receiver letter frequency unit, it is achieved frequency to be closed the frequency of unit
Control；Read ultra-short wave receiver letter frequency the attenuator of unit, amplifier, RF signal strength instruction and
The parameters such as intermediate-freuqncy signal intensity instruction.
2) by the output data of MCBSP port received spectrum perception unit；By UART interface or
SPI communication mouth centering frequency spectrum analysis module is operated state control.
3) send data to technical grade panel computer to show；The input receiving technical grade panel computer refers to
Order and gps data.
4) control the switching of radio-frequency (RF) switch, make radio-frequency (RF) switch selectively switch on a road input signal.
5) integrated treatment unit also includes power-switching circuit, and power-switching circuit is used for providing other module
Needed for/unit, (such as, ultra-short wave receiver voltage is+24V to power supply, and intermediate frequency spectrum analyzes the voltage of module
For+12V and+3.3V, the voltage of technical grade panel computer is+12V).
Spectrum analysis display module also includes for showing short-wave signal spectrum information or ultrashort wave signals frequency spectrum
The technical grade panel computer of information, the input of technical grade panel computer electrically connects above-mentioned integrated treatment unit
Outfan.Specifically, technical grade panel computer is provided with application software, is used for showing amplitude-frequency spectrum letter
Breath, at the same time as control panel, realizes being controlled setting with parameter to each unit by keyboard, mouse
Putting, carry out time synchronized by built-in GPS module, its parameter and interface are as follows:
1) brand: neck number (leadigi).
2) model: HT8080MA-G (enhancement mode, band GPS)；
3) screen: 8 cun of touch screens, 800*600 resolution；
4) processor: 32, the Cortex A8 ARM of dominant frequency 1G Hz；
5) internal memory 512MHz, FLASH 512MHz, supports the extension of 32G SD card；
6) panel degree of protection: IP65, dust-proof class 6, classification of waterproof 5；
7) interface: 4 USB2.0 host interfaces, 1 USB Device interface, 1 network interface, 4 RS232；
8) operating system: WinCE 6.0；
9) power supply: 12-24V DC.
In the embodiment of the present invention, the radio-frequency (RF) switch control controlling end electrical connection integrated treatment unit of radio-frequency (RF) switch
Signal output part processed, so, integrated treatment unit firstly generates radio-frequency (RF) switch control signal, then by it
Transmitting the control end to radio-frequency (RF) switch, radio-frequency (RF) switch is under the control of radio-frequency (RF) switch control signal, it is possible to
Select to connect first input end or the second input with outfan.
In the embodiment of the present invention, can be by technical grade panel computer (passing through touch screen) to integrated treatment
Unit sends relevant control instruction, makes integrated treatment unit generate frequency control word, radio-frequency (RF) switch control letter
Number etc..In the embodiment of the present invention, being additionally provided with AC-DC AC/DC power module, AC-DC hands over
Circulation DC power supplier input accesses 220V alternating current, for 220V alternating current is converted to+24V
DC voltage, then by+24V DC power transmission to the power-switching circuit of integrated treatment unit, power supply turn
Change circuit and produce each module required voltage.The model of AC-DC power module is HPZ60S22024-T,
High-power 50W, input AC nominal value 220V (165V～265V), output 24V (23.8V～24.2V),
Ripple Noise 100mV, typical efficiencies 80%.
The embodiment of the present invention is based on above-mentioned a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system, it is also proposed that
A kind of shortwave/ultrashort wave instant dynamic spectrum detection method.This instant dynamic spectrum of shortwave/ultrashort wave detects
Method comprises the following steps:
S1: ultrashort wave reception antenna receives ultrashort wave signals, and short-wave receiving antenna receives short-wave signal simultaneously,
And the short-wave signal received is sent the second input to radio-frequency (RF) switch；Ultrashort wave reception antenna is by ultrashort
Ripple signal sends to the first frequency-selecting filter, and the first frequency-selecting filter carries out frequency-selective filtering to ultrashort wave signals,
And the signal after frequency-selective filtering is sent to low-noise amplifier；After low-noise amplifier is to frequency-selective filtering
Signal is amplified, and sends amplified signal to tuning filtering device；Reception is put by tuning filtering device
After big, signal is tuned filtering, and sends signal after tuning filtering to the first frequency mixer；First mixing
Signal after tuning filtering and the first local oscillation signal (frequency is 1130MHz～1612MHz) are mixed by device,
And the intermediate-freuqncy signal (frequency is 1100MHz) generated after mixing is sent to the second frequency-selecting filter；The
Two frequency-selecting filters carry out frequency-selective filtering to the intermediate-freuqncy signal generated after mixing, and by after frequency-selective filtering
Frequently signal sends to the first intermediate frequency amplifier；Intermediate-freuqncy signal after frequency-selective filtering is entered by the first intermediate frequency amplifier
Row amplify, and will amplify after intermediate-freuqncy signal send to the first attenuator；First attenuator is automatic first
Under the control of gain control circuit, the intermediate-freuqncy signal after amplifying is decayed, and by attenuation processing
Frequently signal sends to the second frequency mixer；First automatic gain control circuit is controlling the first attenuator to amplification
After intermediate-freuqncy signal decay while, the gain parameter of the first automatic gain control circuit is sent extremely
Integrated treatment unit；Above-mentioned second frequency mixer is receiving after the intermediate-freuqncy signal of attenuation processing, to inciting somebody to action
It is mixed through intermediate-freuqncy signal and second local oscillation signal (frequency is 1078.6MHz) of attenuation processing, and
Intermediate-freuqncy signal (frequency is 21.4MHz) after mixing is sent to the second intermediate frequency amplifier；Second intermediate frequency
Intermediate-freuqncy signal after mixing is amplified by amplifier, and the intermediate-freuqncy signal after amplifying sends to the logical filter of band
Ripple device；Intermediate-freuqncy signal after amplifying is filtered by band filter, and filtered intermediate-freuqncy signal is sent out
Deliver to the first controllable gain amplifier；First controllable gain amplifier is at the second automatic gain control circuit
Under control, filtered intermediate-freuqncy signal is amplified, and the intermediate-freuqncy signal output after amplifying is opened to radio frequency
The first input end closed；Second automatic gain control circuit is controlling the first controllable gain amplifier to filtering
After intermediate-freuqncy signal be amplified while, the gain parameter of the second automatic gain control circuit is sent extremely
Integrated treatment unit；
Radio-frequency (RF) switch, under the control of radio-frequency (RF) switch control signal, optionally receives short-wave signal or first
The intermediate-freuqncy signal of controllable gain amplifier output, the signal received is sent to the second attenuator by radio-frequency (RF) switch.
It should be noted that integrated treatment unit generates radio-frequency (RF) switch control signal, then send to radio-frequency (RF) switch
Radio-frequency (RF) switch control signal.
Specifically, in step sl, frequency closes unit and generates the first local oscillation signal (frequently according to frequency control word
Rate is 1130MHz～1612MHz), then generate second according to the first local oscillation signal and frequency control word
Shake signal (frequency is 1078.6MHz).Frequency control word uses synchronous serial interface host-host protocol to be transmitted,
Each frequency control word comprises 4 frequency words, 8 bits of each frequency word, uses BCD coding.
The transmission of S2: radio-frequency (RF) switch is that intermediate frequency spectrum analyzes module input signal to the signal of the second attenuator,
Second attenuator is after receiving intermediate frequency spectrum analysis module input signal, and centering frequency spectrum analysis module is defeated
Enter signal and carry out attenuation processing, and the signal through attenuation processing is sent to the second controllable gain amplifier；
Second controllable gain amplifier is under the control of the 3rd automatic gain control circuit, to the letter through attenuation processing
Number it is amplified, and the signal after amplifying sends to low pass filter；3rd automatic gain control circuit
While control the second controllable gain amplifier carries out signal amplification, by the 3rd automatic gain control circuit
Gain parameter send to frequency spectrum perception unit；After low pass filter signal after receiving amplification,
Signal after amplifying is carried out low-pass filtering, and signal after low-pass filtering is sent to analog-digital converter；Mould
Number converter carries out analog digital conversion to signal after low-pass filtering, and sends the digital signal generated to numeral
Signal mixer；Digital signal frequency mixer carries out Frequency mixing processing to digital signal and the local oscillation signal of reception,
And the digital signal after mixing is sent to digital down converter；Digital down converter is to the number after mixing
Word signal carries out down-converted, and sends the digital signal after down-converted to demodulator；Demodulation
Digital signal after down-converted is demodulated processing by device, obtains digital baseband signal, and demodulator will
The local carrier frequency used when digital baseband signal and demodulation sends to frequency spectrum perception unit.
S3: the basis used when above-mentioned frequency spectrum perception unit is demodulated according to digital baseband signal, demodulator
Ground carrier frequency and the gain parameter of the 3rd automatic gain control circuit, show that above-mentioned intermediate frequency spectrum is divided
Analysis module input signal spectrum and energy value；The intermediate frequency spectrum drawn is analyzed mould by above-mentioned frequency spectrum perception unit
Block input signal spectrum and energy value send to integrated treatment unit.
Specifically, step S3 specifically includes following sub-step:
S31: digital baseband signal represents that s, the plural form of digital baseband signal s are: s=i+jq, its
In, i represents the real part of digital baseband signal s, and q represents the imaginary part of digital baseband signal s；Frequency spectrum perception list
Unit receiving digital baseband signal s, demodulator use when being demodulated local carrier frequency, Yi Ji
After the gain parameter of three automatic gain control circuits, digital baseband signal s is carried out Fourier transformation, Fu
In the procedural representation of leaf transformation be:
FFT [s]=FFT [i+jq]=I (n)+jQ (n)
Wherein, FFT [] expression carries out Fourier transformation, and I (n) represents that digital baseband signal s carries out Fourier transformation
The real part of gained frequency-region signal, Q (n) represents that word baseband signal s carries out Fourier transformation gained frequency-region signal
Imaginary part, n represents Frequency point；N is integer and 0≤n≤N-1, and N is counting of Fourier transformation；
The energy value P of digital frequency space corresponding for digital baseband signal s is drawn according to below equatione(n):
Pe(n)=10log10[I2(n)+Q2(n)]
Wherein, the energy value P of corresponding for digital baseband signal s digital frequency spaceeN the unit of () is dB.
S32: set a radio-frequency signal source output energy value Psl(unit is dB)；According to initial time
Gain parameter AGC3 of the 3rd automatic gain control circuit, show that the second controllable gain amplifier is when initial
The gain f (AGC3) carved, initial time was designated as 0 moment, and the unit of f (AGC3) is dB.
S32: find out the energy value P of digital frequency space corresponding for initial time digital baseband signal seIn (n)
Maximum Pe(ni), Pe(ni)=max [Pe(n)], max [] expression takes maximum, niFor integer and
0≤ni≤N-1。
S33: show that the intermediate frequency spectrum that each Frequency point of initial time is corresponding analyzes module according to below equation defeated
Enter the energy value of signal, initial time Frequency point njCorresponding radio frequency energy value P (nj) it is:
P(nj)=Psl+ΔPe
Wherein, Δ Pe=Pe(nj)-Pe(ni), njFor integer and 0≤nj≤ N-1, Pe(nj) represent initial time number
The digital frequency space medium frequency point n that word baseband signal s is correspondingjThe energy value at place.
S34: arrange integer variable m=1,2..., according to the gain of m moment the 3rd automatic gain control circuit
Parameter AGC3m(such as, the gain parameter of the 3rd automatic gain control circuit is that the second controllable gain amplifies
The gain of device), draw the second controllable gain amplifier gain f (AGC3 in the m momentm)；When drawing m
Carve the maximum P in the energy value of digital frequency space corresponding for digital baseband signal sem(nm),
Pem(nm)=max [Pem(n)], max [] expression takes maximum, nmFor integer and 0≤nm≤N-1。
Then m moment Frequency point n is drawn according to below equationmThe intermediate frequency spectrum analysis module input that place is corresponding
Energy value P (the n of signalm) it is:
P(nm)=Psl+ΔPem+Δf(AGC)m,
Wherein, Δ Pem=Pem(nm)-Pe(ni), Δ f (AGC)m=f (AGC3m)-f(AGC3)。
Show that intermediate frequency spectrum corresponding at m moment each Frequency point analyzes module input letter according to below equation
Number energy value, intermediate frequency spectrum corresponding at m moment Frequency point n analyzes the energy value of module input signal
P (n) is: P (n)=P (nm)+ΔPem', Δ Pem'=Pem(n)-Pem(nm), PemN () is m moment numeral
The energy value at digital frequency space medium frequency point n that baseband signal s is corresponding；N be integer and
0≤n≤N-1。
S35: local carrier frequency c used when utilizing m moment demodulator to be demodulatedm, draw the m moment
The intermediate frequency spectrum that each Frequency point is corresponding analyzes the frequency of module input signal, and m moment Frequency point n is corresponding
It is f that intermediate frequency spectrum analyzes the frequency of module input signalnm,Wherein, fsRepresent modulus
Sample frequency (such as, the f of transducersFor 9.6kHz).
From the foregoing, it will be observed that when carrying out Logarithmic calculation, multiplication and division all become linear operation, so sub
Step S31 is linear calculating to the calculating process of sub-step S35；Simultaneously at digitalization receiving subsystem at RF list
Filter parameter during unit processes is all fixing, so different intermediate frequency spectrum is analyzed module input letter
Number, the impact of wave filter can not be considered, so use above-mentioned computational methods can by baseband signal numeral
The difference of the energy value of frequency domain is reacted directly into intermediate frequency spectrum and analyzes on the energy value of module input signal.
S4: above-mentioned integrated treatment unit according to the gain parameter of the first automatic gain control circuit, second from
Gain parameter and the intermediate frequency spectrum of dynamic gain control circuit analyze module input signal spectrum and energy value,
Show that short-wave signal spectrum information or ultrashort wave signals spectrum information, above-mentioned short-wave signal spectrum information include
The frequency spectrum of above-mentioned short-wave signal and the energy value of above-mentioned short-wave signal, above-mentioned ultrashort wave signals spectrum information bag
Include frequency spectrum and the energy value of above-mentioned ultrashort wave signals of above-mentioned ultrashort wave signals.
The short-wave signal spectrum information drawn or ultrashort wave signals spectrum information are sent out by above-mentioned integrated treatment unit
Deliver to technical grade panel computer, technical grade computer display short-wave signal spectrum information or ultrashort wave signals frequency spectrum
Information.
Specifically, in step sl, receive from short-wave antenna when integrated treatment unit controls radio-frequency (RF) switch
Short-wave signal time, it is short-wave signal that the intermediate frequency spectrum of step S3 analyzes module input signal, thus,
In step S3, draw above-mentioned short-wave signal spectrum information；In step s 4, integrated treatment unit receives
To above-mentioned short-wave signal spectrum information, and above-mentioned shortwave spectrum information is sent to technical grade panel computer；
In step sl, receive in ultra-short wave receiver when integrated treatment unit controls radio-frequency (RF) switch
Frequently, during signal, it is the intermediate frequency that ultra-short wave receiver sends that the intermediate frequency spectrum of step S3 analyzes module input signal
Signal, thus, in step s3, draw frequency spectrum and the energy value of above-mentioned intermediate-freuqncy signal；In step S4
In, integrated treatment unit receives frequency spectrum and the energy value of above-mentioned intermediate-freuqncy signal；In integrated treatment unit,
Draw energy value and the frequency of the ultrashort wave signals that m moment each Frequency point is corresponding, m moment Frequency point n pair
The energy value P of the ultrashort wave signals answeredsvhf,mnFor: Psvhf,mn=P (n)+fvhf,m(AGC1m,AGC2m), its
In, AGC1mRepresent the gain parameter (such as, first of m moment above-mentioned first automatic gain control circuit
The gain parameter of automatic gain control circuit is the attenuation quotient of the first attenuator), AGC2mRepresent the m moment
Gain parameter (such as, the increasing of the second automatic gain control circuit of above-mentioned second automatic gain control circuit
Benefit parameter is the gain of the first controllable gain amplifier), fvhf,m(AGC1m,AGC2m) represent the m moment the
The attenuation of one attenuator and the gain sum of m moment the first controllable gain amplifier；
Frequency f of the ultrashort wave signals that m moment Frequency point n is correspondingvhf,mnFor
fvhf,mn=fnm+fsyn
Wherein, fvhf,mnRepresent the frequency control word that in step 1, integrated treatment unit generates, in the embodiment of the present invention,
fvhf,mnBetween 30MHz to 512MHz.
Obviously, those skilled in the art can carry out various change and modification without deviating from the present invention to the present invention
Spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (7)
1. shortwave/ultrashort wave instant dynamic spectrum detecting system, it is characterised in that including: radio frequency is opened
Pass, spectrum analysis display module, ultra-short wave receiver, for receiving the ultrashort wave antenna of ultrashort wave signals
(1) and for receiving the short-wave antenna (2) of short-wave signal；
Described radio-frequency (RF) switch is single-pole double-throw switch (SPDT), described radio-frequency (RF) switch be provided with first input end, second
Input, outfan and control end, the control of described radio-frequency (RF) switch terminates to be believed into radio frequency on-off control
Number, the first input end of described radio-frequency (RF) switch electrical connection ultrashort wave antenna (1), the of described radio-frequency (RF) switch
Two inputs electrical connection short-wave antenna (2), the outfan electrical connection spectrum analysis of described radio-frequency (RF) switch shows
The input of module；
Described ultrashort wave antenna (1) electrically connects the first of described radio-frequency (RF) switch by described ultra-short wave receiver
Input；
The input of described ultra-short wave receiver is electrically connected with ultrashort wave antenna (1)；Described ultrashort wave receives
The first frequency-selecting filter that machine includes being sequentially connected electrically, low-noise amplifier, tuning filtering device, first mix
Frequently device, the second frequency-selecting filter, the first intermediate frequency amplifier, the first attenuator, the second frequency mixer, second
Intermediate frequency amplifier, band filter and the first controllable gain amplifier, described first frequency-selecting filter
Input electrically connect described ultrashort wave antenna (1), the local oscillator input of described first frequency mixer accesses the
One local oscillation signal, the local oscillator input of described second frequency mixer accesses the second local oscillation signal；Described first declines
Subtract the first automatic gain control circuit being provided with on device for controlling the first attenuator attenuation, described
The second automatic of gain for controlling the first controllable gain amplifier it is provided with on one controllable gain amplifier
Gain control circuit；The outfan of described first controllable gain amplifier electrically connects the of described radio-frequency (RF) switch
One input, the display of described frequency spectrum is analyzed module and is electrically connected the gain of the first automatic gain control circuit
The gain parameter outfan of parameter output and the second automatic gain control circuit.
2. a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system as claimed in claim 1, its feature
Being, described spectrum analysis display module includes that intermediate frequency spectrum analyzes module；Described intermediate frequency spectrum analyzes mould
Block includes being changed into the RF digitization of digital baseband signal for intermediate frequency spectrum is analyzed module input signal
Receive unit and for showing that intermediate frequency spectrum analyzes module input signal spectrum and the frequency spectrum sense of energy value
Know unit；Described intermediate frequency spectrum analyze module input signal be intermediate frequency spectrum analyze module receive from penetrating
The signal of frequency switch；Described digitalization receiving subsystem at RF unit includes: the second attenuator of being sequentially connected in series,
Under second controllable gain amplifier, low pass filter, analog-digital converter, digital signal frequency mixer, numeral
Converter and demodulator；It is provided with for controlling the second controllable gain on described second controllable gain amplifier
3rd automatic gain control circuit of the gain of amplifier；The input electrical connection of described second attenuator is penetrated
The outfan of frequency switch；The input of described frequency spectrum perception unit is electrically connected the 3rd automatic growth control
The gain parameter outfan of circuit and the outfan of demodulator；
Described spectrum analysis display module includes: join for the gain according to the first automatic gain control circuit
Number, the gain parameter of the second automatic gain control circuit and intermediate frequency spectrum analyze module input signal frequency
Spectrum and energy value, draw the integrated treatment unit of short-wave signal spectrum information or ultrashort wave signals spectrum information,
The outfan of described frequency spectrum perception unit electrically connects the input of described integrated treatment unit；Described shortwave is believed
Number spectrum information includes frequency spectrum and the energy value of described short-wave signal of described short-wave signal, described ultrashort wave
Signal spectrum information includes frequency spectrum and the energy value of described ultrashort wave signals of described ultrashort wave signals；
Described spectrum analysis display module also includes for showing short-wave signal spectrum information or ultrashort wave signals
The technical grade panel computer of spectrum information, the input electrical connection of described technical grade panel computer is described comprehensively
The outfan of processing unit.
3. a kind of shortwave/ultrashort wave instant dynamic spectrum detecting system as claimed in claim 2, its feature
It is, the radio-frequency (RF) switch control signal output controlling end electrical connection integrated treatment unit of described radio-frequency (RF) switch
End.
4. shortwave/ultrashort wave instant dynamic spectrum detection method, based on the shortest
Ripple/ultrashort wave instant dynamic spectrum detecting system, it is characterised in that comprise the following steps:
S1: ultrashort wave reception antenna receives ultrashort wave signals, and short-wave receiving antenna receives short-wave signal simultaneously,
And the short-wave signal received is sent the second input to radio-frequency (RF) switch；Ultrashort wave reception antenna is by ultrashort
Ripple signal sends to the first frequency-selecting filter, and the first frequency-selecting filter carries out frequency-selective filtering to ultrashort wave signals,
And the signal after frequency-selective filtering is sent to low-noise amplifier；After low-noise amplifier is to frequency-selective filtering
Signal is amplified, and sends amplified signal to tuning filtering device；Reception is put by tuning filtering device
After big, signal is tuned filtering, and sends signal after tuning filtering to the first frequency mixer；First mixing
Signal after tuning filtering and the first local oscillation signal are mixed by device, and the intermediate-freuqncy signal that will generate after mixing
Send to the second frequency-selecting filter；Second frequency-selecting filter carries out frequency-selecting to the intermediate-freuqncy signal generated after mixing
Filtering, and the intermediate-freuqncy signal after frequency-selective filtering is sent to the first intermediate frequency amplifier；First intermediate frequency amplifier
Intermediate-freuqncy signal after frequency-selective filtering is amplified, and will amplify after intermediate-freuqncy signal send to first decay
Device；Intermediate-freuqncy signal after amplifying is carried out under the control of the first automatic gain control circuit by the first attenuator
Decay, and the intermediate-freuqncy signal through attenuation processing is sent to the second frequency mixer；First automatic growth control electricity
Road is while the intermediate-freuqncy signal after amplifying is decayed by control the first attenuator, by the first automatic gain
The gain parameter of control circuit sends to integrated treatment unit；Described second frequency mixer is receiving through decay
After the intermediate-freuqncy signal processed, it is mixed by intermediate-freuqncy signal and the second local oscillation signal through attenuation processing,
And the intermediate-freuqncy signal after mixing is sent to the second intermediate frequency amplifier；After second intermediate frequency amplifier is to mixing
Intermediate-freuqncy signal is amplified, and will amplify after intermediate-freuqncy signal send to band filter；Band filter
Intermediate-freuqncy signal after amplifying is filtered, and filtered intermediate-freuqncy signal is sent to the first controllable gain
Amplifier；First controllable gain amplifier under the control of the second automatic gain control circuit to filtered
Intermediate-freuqncy signal is amplified, and the intermediate-freuqncy signal output after amplifying is to the first input end of radio-frequency (RF) switch；
Filtered intermediate-freuqncy signal is carried out by the second automatic gain control circuit at control the first controllable gain amplifier
While amplification, the gain parameter of the second automatic gain control circuit is sent to integrated treatment unit；
Radio-frequency (RF) switch, under the control of radio-frequency (RF) switch control signal, optionally receives short-wave signal or first
The intermediate-freuqncy signal of controllable gain amplifier output, the signal received is sent to the second attenuator by radio-frequency (RF) switch；
The transmission of S2: radio-frequency (RF) switch is that intermediate frequency spectrum analyzes module input signal to the signal of the second attenuator,
Second attenuator is after receiving intermediate frequency spectrum analysis module input signal, and centering frequency spectrum analysis module is defeated
Enter signal and carry out attenuation processing, and the signal through attenuation processing is sent to the second controllable gain amplifier；
Second controllable gain amplifier is under the control of the 3rd automatic gain control circuit, to the letter through attenuation processing
Number it is amplified, and the signal after amplifying sends to low pass filter；3rd automatic gain control circuit
While control the second controllable gain amplifier carries out signal amplification, by the 3rd automatic gain control circuit
Gain parameter send to frequency spectrum perception unit；After low pass filter signal after receiving amplification,
Signal after amplifying is carried out low-pass filtering, and signal after low-pass filtering is sent to analog-digital converter；Mould
Number converter carries out analog digital conversion to signal after low-pass filtering, and sends the digital signal generated to numeral
Signal mixer；Digital signal and the local oscillation signal of reception are carried out Frequency mixing processing by digital signal frequency mixer,
And the digital signal after mixing is sent to digital down converter；Digital down converter is to the number after mixing
Word signal carries out down-converted, and sends the digital signal after down-converted to demodulator；Demodulation
Digital signal after down-converted is demodulated processing by device, obtains digital baseband signal, and demodulator will
The local carrier frequency used when digital baseband signal and demodulation sends to frequency spectrum perception unit；
S3: the basis used when described frequency spectrum perception unit is demodulated according to digital baseband signal, demodulator
Ground carrier frequency and the gain parameter of the 3rd automatic gain control circuit, show that described intermediate frequency spectrum is divided
Analysis module input signal spectrum and energy value；The intermediate frequency spectrum drawn is analyzed mould by described frequency spectrum perception unit
Block input signal spectrum and energy value send to integrated treatment unit；
S4: described integrated treatment unit according to the gain parameter of the first automatic gain control circuit, second from
Gain parameter and the intermediate frequency spectrum of dynamic gain control circuit analyze module input signal spectrum and energy value,
Show that short-wave signal spectrum information or ultrashort wave signals spectrum information, described short-wave signal spectrum information include
The frequency spectrum of described short-wave signal and the energy value of described short-wave signal, described ultrashort wave signals spectrum information bag
Include frequency spectrum and the energy value of described ultrashort wave signals of described ultrashort wave signals；
The short-wave signal spectrum information drawn or ultrashort wave signals spectrum information are sent out by described integrated treatment unit
Deliver to technical grade panel computer, technical grade computer display short-wave signal spectrum information or ultrashort wave signals frequency spectrum
Information.
5. a kind of shortwave/ultrashort wave instant dynamic spectrum detection method as claimed in claim 4, its feature
Being, described ultra-short wave receiver also includes for generating the first local oscillation signal and the frequency of the second local oscillation signal
Closing unit, described frequency closes unit and has input, the first outfan and the second outfan, and described frequency closes single
The outfan of the input electrical connection integrated treatment unit of unit, described frequency closes the first outfan of unit and is electrically connected
Connecing the local oscillator input of the first frequency mixer, described frequency closes the second outfan of unit and electrically connects the second frequency mixer
Local oscillator input；
In step sl, described integrated treatment unit generates frequency control word, and is sent by frequency control word
Unit is closed to frequency；Described frequency closes unit and generates the first local oscillation signal and the second local oscillator letter according to frequency control word
Number；Described frequency closes unit and is sent by the first local oscillation signal to the first frequency mixer, and described frequency closes unit by second
Local oscillation signal sends to the second frequency mixer.
6. a kind of shortwave/ultrashort wave instant dynamic spectrum detection method as claimed in claim 4, its feature
Being, described step S3 specifically includes following sub-step:
S31: digital baseband signal represents that s, the plural form of digital baseband signal s are: s=i+jq, its
In, i represents the real part of digital baseband signal s, and q represents the imaginary part of digital baseband signal s；Frequency spectrum perception list
Unit receiving digital baseband signal s, demodulator use when being demodulated local carrier frequency, Yi Ji
After the gain parameter of three automatic gain control circuits, digital baseband signal s is carried out Fourier transformation, Fu
In the procedural representation of leaf transformation be:
FFT [s]=FFT [i+jq]=I (n)+jQ (n)
Wherein, FFT [] expression carries out Fourier transformation, and I (n) represents that digital baseband signal s carries out Fourier transformation
The real part of gained frequency-region signal, Q (n) represents that word baseband signal s carries out Fourier transformation gained frequency-region signal
Imaginary part, n represents Frequency point；N is integer and 0≤n≤N-1, and N is counting of Fourier transformation；
The energy value P of digital frequency space corresponding for digital baseband signal s is drawn according to below equatione(n):
Pe(n)=10log10[I2(n)+Q2(n)]
S32: set a radio-frequency signal source output energy value Psl；According to initial time the 3rd automatic gain
Gain parameter AGC3 of control circuit, draws the gain at initial time of second controllable gain amplifier
F (AGC3), initial time was designated as 0 moment；
S32: find out the energy value P of digital frequency space corresponding for initial time digital baseband signal seIn (n)
Maximum Pe(ni), Pe(ni)=max [Pe(n)], max [] expression takes maximum, niFor integer and
0≤ni≤N-1；
S33: show that the intermediate frequency spectrum that each Frequency point of initial time is corresponding analyzes module according to below equation defeated
Enter the energy value of signal, initial time Frequency point njCorresponding radio frequency energy value P (nj) it is:
P(nj)=Psl+ΔPe
Wherein, Δ Pe=Pe(nj)-Pe(ni), njFor integer and 0≤nj≤ N-1, Pe(nj) represent initial time number
The digital frequency space medium frequency point n that word baseband signal s is correspondingjThe energy value at place；
S34: arrange integer variable m=1,2..., according to the gain of m moment the 3rd automatic gain control circuit
Parameter AGC3m, draw the second controllable gain amplifier gain f (AGC3 in the m momentm)；When drawing m
Carve the energy value P of digital frequency space corresponding for digital baseband signal semMaximum P in (n)em(nm),
Pem(nm)=max [Pem(n)], max [] expression takes maximum, nmFor integer and 0≤nm≤N-1；
Then m moment Frequency point n is drawn according to below equationmThe intermediate frequency spectrum analysis module input that place is corresponding
Energy value P (the n of signalm) it is:
P(nm)=Psl+ΔPem+Δf(AGC)m,
Wherein, Δ Pem=Pem(nm)-Pe(ni), Δ f (AGC)m=f (AGC3m)-f(AGC3)；
Show that intermediate frequency spectrum corresponding at m moment each Frequency point analyzes module input letter according to below equation
Number energy value, intermediate frequency spectrum corresponding at m moment Frequency point n analyzes the energy value of module input signal
P (n) is: P (n)=P (nm)+ΔPem', Δ Pem'=Pem(n)-Pem(nm), PemN () is m moment numeral
The energy value at digital frequency space medium frequency point n that baseband signal s is corresponding；N be integer and
0≤n≤N-1；
S35: local carrier frequency c used when utilizing m moment demodulator to be demodulatedm, draw the m moment
The intermediate frequency spectrum that each Frequency point is corresponding analyzes the frequency of module input signal, and m moment Frequency point n is corresponding
It is f that intermediate frequency spectrum analyzes the frequency of module input signalnm,Wherein, fsRepresent sampling
Frequency.
7. a kind of shortwave/ultrashort wave instant dynamic spectrum detection method as claimed in claim 6, its feature
Being, described ultra-short wave receiver also includes for generating the first local oscillation signal and the frequency of the second local oscillation signal
Closing unit, described frequency closes unit and has input, the first outfan and the second outfan, and described frequency closes single
The outfan of the input electrical connection integrated treatment unit of unit, described frequency closes the first outfan of unit and is electrically connected
Connecing the local oscillator input of the first frequency mixer, described frequency closes the second outfan of unit and electrically connects the second frequency mixer
Local oscillator input；The radio-frequency (RF) switch controlling end electrical connection integrated treatment unit of described radio-frequency (RF) switch controls
Signal output part；
In step sl, described integrated treatment unit generates frequency control word, and is sent by frequency control word
Unit is closed to frequency；Described frequency closes unit and generates the first local oscillation signal and the second local oscillator letter according to frequency control word
Number；Described frequency closes unit and is sent by the first local oscillation signal to the first frequency mixer, and described frequency closes unit by second
Local oscillation signal sends to the second frequency mixer；
In step sl, integrated treatment unit generates radio-frequency (RF) switch control signal, then sends out to radio-frequency (RF) switch
Send radio-frequency (RF) switch control signal；
In step sl, the shortwave letter from short-wave antenna is received when integrated treatment unit controls radio-frequency (RF) switch
Number time, it is short-wave signal that the intermediate frequency spectrum of step S3 analyzes module input signal, thus, in step S3
In, draw described short-wave signal spectrum information；In step s 4, integrated treatment unit receives described short
Ripple signal spectrum information, and described shortwave spectrum information is sent to technical grade panel computer；
In step sl, receive in ultra-short wave receiver when integrated treatment unit controls radio-frequency (RF) switch
Frequently, during signal, it is the intermediate frequency that ultra-short wave receiver sends that the intermediate frequency spectrum of step S3 analyzes module input signal
Signal, thus, in step s3, draw frequency spectrum and the energy value of described intermediate-freuqncy signal；In step S4
In, integrated treatment unit receives frequency spectrum and the energy value of described intermediate-freuqncy signal；In integrated treatment unit,
Draw energy value and the frequency of the ultrashort wave signals that m moment each Frequency point is corresponding, m moment Frequency point n pair
The energy value P of the ultrashort wave signals answeredsvhf,mnFor: Psvhf,mn=P (n)+fvhf,m(AGC1m,AGC2m), its
In, AGC1mRepresent the gain parameter of the first automatic gain control circuit, AGC2 described in the m momentmRepresent
The gain parameter of the second automatic gain control circuit, f described in the m momentvhf,m(AGC1m,AGC2m) represent m
The attenuation of moment the first attenuator and the gain sum of m moment the first controllable gain amplifier；
Frequency f of the ultrashort wave signals that m moment Frequency point n is correspondingvhf,mnFor
fvhf,mn=fnm+fsyn
Wherein, fsynRepresent the frequency control word that in step 1, integrated treatment unit generates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410455210.XA CN104202101B (en) | 2014-09-09 | 2014-09-09 | A kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410455210.XA CN104202101B (en) | 2014-09-09 | 2014-09-09 | A kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104202101A CN104202101A (en) | 2014-12-10 |
| CN104202101B true CN104202101B (en) | 2016-08-17 |
Family
ID=52087340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410455210.XA Active CN104202101B (en) | 2014-09-09 | 2014-09-09 | A kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104202101B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162531B (en) * | 2015-08-14 | 2017-10-20 | 成都中安频谱科技有限公司 | A kind of ultrashort wave broadband monitoring system and method |
| CN110320539B (en) * | 2018-03-30 | 2024-01-30 | 华为技术有限公司 | Bit synchronization method applied to satellite positioning system and related device |
| CN110034831B (en) * | 2019-02-25 | 2020-03-06 | 北京理工大学 | Low-complexity frequency spectrum monitoring device and method |
| CN111026345A (en) * | 2019-12-09 | 2020-04-17 | 杭州电子科技大学 | Device and method for short wave data display control |
| CN113810072B (en) * | 2020-06-17 | 2024-07-09 | 兰州融信智能电子科技有限公司 | Broadband dual-channel radio monitoring and receiving system and signal detection method |
| CN113318952A (en) * | 2021-06-29 | 2021-08-31 | 长江智能科技(广东)股份有限公司 | Full-digital ultrasonic generator control system and method |
| CN114157314A (en) * | 2021-11-16 | 2022-03-08 | 中国电子科技集团公司第四十一研究所 | Reconfigurable electromagnetic spectrum monitoring device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008088862A1 (en) * | 2007-01-18 | 2008-07-24 | Mobileaccess Networks Ltd. | Method and system for equalizing cable losses in a distributed antenna system |
| CN102710353A (en) * | 2012-06-27 | 2012-10-03 | 严天峰 | Broadband radio frequency spectrum monitoring station |
| CN202631635U (en) * | 2012-04-16 | 2012-12-26 | 罗森伯格（上海）通信技术有限公司 | Radio frequency test system |
| CN204131528U (en) * | 2014-09-09 | 2015-01-28 | 西安烽火电子科技有限责任公司 | The instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004056339A (en) * | 2002-07-18 | 2004-02-19 | Advantest Corp | Transmission radio wave evaluation system |
| CN203278843U (en) * | 2013-04-07 | 2013-11-06 | 南京纳特通信电子有限公司 | Low-intermodulation radio frequency coaxial switch test matrix |
-
2014
- 2014-09-09 CN CN201410455210.XA patent/CN104202101B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008088862A1 (en) * | 2007-01-18 | 2008-07-24 | Mobileaccess Networks Ltd. | Method and system for equalizing cable losses in a distributed antenna system |
| CN202631635U (en) * | 2012-04-16 | 2012-12-26 | 罗森伯格（上海）通信技术有限公司 | Radio frequency test system |
| CN102710353A (en) * | 2012-06-27 | 2012-10-03 | 严天峰 | Broadband radio frequency spectrum monitoring station |
| CN204131528U (en) * | 2014-09-09 | 2015-01-28 | 西安烽火电子科技有限责任公司 | The instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104202101A (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104202101B (en) | A kind of shortwave/ultrashort wave instant dynamic spectrum detecting system and method | |
| CN106443122B (en) | High-precision measurement device and method for wide-band large dynamic signal | |
| CN110350932A (en) | A kind of high-frequency wideband receiver and signal processing method | |
| CN105842561B (en) | A kind of background signal removing method for being suitable for live electromagnetic interference detection | |
| CN106877892B (en) | A kind of anti-interference reception circuit structure, method and apparatus | |
| CN105897302A (en) | Wireless interference scanning method and wireless interference scanning device for adaptive frequency hopping | |
| CN106199526A (en) | A kind of secondary radar receiver noise trap | |
| CN204131528U (en) | The instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave | |
| EP2326016A3 (en) | Narrow-band interference detector, signal receiver employing narrow-band interference detector and controlling demodulator parameter setting according to narrow-band interference detection result, and related methods therefor | |
| CN109257020A (en) | A kind of experimental circuit can be realized faint amplitude-modulated signal demodulation | |
| CN102752248A (en) | Integrated amplitude modulation broadcasting receiver and receiving method thereof | |
| CN109451509A (en) | NB-IOT base station signal measuring device and its measurement processing method | |
| CN101034904B (en) | Device and method for the FM radio to accurately search broadcasting station | |
| CN202798742U (en) | Automatic squelch circuit | |
| CN111045035A (en) | Navigation signal anti-interference method, device and system | |
| CN103236863B (en) | Muting method of FM (frequency modulation) digital modulation-demodulation circuit by hard limiter | |
| CN104242966B (en) | Noise cancellation method and noise elimination apparatus | |
| CN203643599U (en) | Secondary radar high- and intermediate-frequency digital receiver | |
| CN205356314U (en) | Ultrashort wave radio station received signal treatment circuit | |
| CN209046631U (en) | Minimize two-channel receiver | |
| CN114136891A (en) | fA level weak signal detection method and device for terahertz spectrum and imaging system | |
| CN111697977B (en) | Ultra-wideband frequency spectrum monitoring system and method | |
| CN114142879A (en) | Automatic squelch method for wireless receiving voice | |
| CN101998459B (en) | Method and device for measuring single-tone field strength | |
| CN206349990U (en) | A kind of digital handset receiver demodulating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |