CN104202101A - Short wave/ultra-short wave instant dynamic spectrum sensing system and method - Google Patents

Short wave/ultra-short wave instant dynamic spectrum sensing system and method Download PDF

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CN104202101A
CN104202101A CN201410455210.XA CN201410455210A CN104202101A CN 104202101 A CN104202101 A CN 104202101A CN 201410455210 A CN201410455210 A CN 201410455210A CN 104202101 A CN104202101 A CN 104202101A
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frequency
signal
sent
spectrum
short
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CN104202101B (en
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王超
王小军
周勇敢
吕星
刘泽奇
赵亮
刘放
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Shaanxi Fenghuo Communication Group Co Ltd
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Shaanxi Fenghuo Communication Group Co Ltd
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Abstract

The invention belongs to the technical field of short wave/ultra-short wave spectrum sensing analysis, and particularly relates to a short wave/ultra-short wave instant dynamic spectrum sensing system and method. The short wave/ultra-short wave instant dynamic spectrum sensing system comprises a radio frequency switch, a spectrum analysis display module, an ultra-short wave antenna and a short wave antenna, wherein the ultra-short wave antenna is used for receiving ultra-short wave signals, and the short wave antenna is used for receiving short wave signals. The radio frequency switch is a single-pole double-throw switch and provided with a first input end, a second input end, an output end and a control end, radio frequency switch control signals are connected into the control end of the radio frequency switch, the first input end of the radio frequency switch is electrically connected with the ultra-short wave antenna, the second input end of the radio frequency switch is electrically connected with the short wave antenna, and the output end of the radio frequency switch is electrically connected with an input end of the spectrum analysis display module.

Description

The instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave and method
Technical field
The invention belongs to shortwave/ultrashort wave frequency spectrum detection analysis technical field, particularly the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave and method.
Background technology
Because various noises, interference in present wireless communications environment get more and more, cause existing shortwave/ultrashort wave radio set to be faced with in actual use than the complicated electromagnetic environment all of any moment in the past, often cannot find the very first time reliably, the measured communication frequency of matter.In existing shortwave/ultrashort wave frequency spectrum detection analytical method, shortwave spectrum and ultrashort wave frequency spectrum need to be done to detect and analyze separately, and conventionally at radio-frequency front-end, do spectrum analysis, at radio-frequency front-end, signal is carried out to frequency spectrum detection analysis and cause signal minimum radius limited (being poor sensitivity), the resolution that can detect low.
Summary of the invention
The object of the invention is to propose the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave and method.
For realizing above-mentioned technical purpose, the present invention adopts following technical scheme to be achieved.
Technical scheme one:
The instant dynamic spectrum detection system of shortwave/ultrashort wave, comprising: radio-frequency (RF) switch, spectrum analysis display module, for receiving the ultrashort wave antenna of ultrashort wave signal 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, output and control end, the control end access radio-frequency (RF) switch control signal of described radio-frequency (RF) switch, the first input end of described radio-frequency (RF) switch is electrically connected to ultrashort wave antenna, the second input of described radio-frequency (RF) switch is electrically connected to short-wave antenna, and the output of described radio-frequency (RF) switch is electrically connected to the input of spectrum analysis display module.
The feature of the technical program and further improvement are:
The instant dynamic spectrum detection system of described a kind of shortwave/ultrashort wave, also comprises ultra-short wave receiver, and described ultrashort wave antenna is electrically connected to 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 comprises the first frequency-selecting filter, low noise amplifier, tuned filter, the first frequency mixer, the second frequency-selecting filter, the first intermediate frequency amplifier, the first attenuator, the second frequency mixer, the second intermediate frequency amplifier, band pass filter and the first controllable gain amplifier being electrically connected to successively, the input of described the first frequency-selecting filter is electrically connected to described ultrashort wave antenna, the local oscillator input of described the first frequency mixer accesses the first local oscillation signal, and the local oscillator input of described the second frequency mixer accesses the second local oscillation signal; On described the first attenuator, be provided with for controlling the first automatic gain control circuit of the first attenuator attenuation, on described the first controllable gain amplifier, be provided with for controlling the second automatic gain control circuit of the gain of the first controllable gain amplifier; The output of described the first controllable gain amplifier is electrically connected to the first input end of described radio-frequency (RF) switch, and described frequency spectrum display analysis module is electrically connected to respectively the gain parameter output of the first automatic gain control circuit and the gain parameter output of the second automatic gain control circuit.
Described spectrum analysis display module comprises intermediate frequency spectrum analysis module; Described intermediate frequency spectrum analysis module comprises for intermediate frequency spectrum analysis module input signal being changed into the digitalization receiving subsystem at RF unit of digital baseband signal and for drawing the frequency spectrum perception unit of intermediate frequency spectrum analysis module input signal spectrum and energy value; Described intermediate frequency spectrum analysis module input signal is the signal from radio-frequency (RF) switch that intermediate frequency spectrum analysis module receives; Described digitalization receiving subsystem at RF unit comprises: the second attenuator being connected in series successively, the second controllable gain amplifier, low pass filter, analog to digital converter, digital signal frequency mixer, digital down converter and demodulator; On described the second controllable gain amplifier, be provided with for controlling the 3rd automatic gain control circuit of the gain of the second controllable gain amplifier; The input of described the second attenuator is electrically connected to the output of radio-frequency (RF) switch; The input of described frequency spectrum perception unit is electrically connected to respectively the gain parameter output of the 3rd automatic gain control circuit and the output of demodulator;
Described spectrum analysis display module comprises: for according to the gain parameter of the gain parameter of the first automatic gain control circuit, the second automatic gain control circuit and intermediate frequency spectrum analysis module input signal spectrum and energy value, draw the integrated treatment unit of short-wave signal spectrum information or ultrashort wave signal spectrum information, the output of described frequency spectrum perception unit is electrically connected to the input of described integrated treatment unit; Described short-wave signal spectrum information comprises the frequency spectrum of described short-wave signal and the energy value of described short-wave signal, and described ultrashort wave signal spectrum information comprises the frequency spectrum of described ultrashort wave signal and the energy value of described ultrashort wave signal;
Described spectrum analysis display module also comprises that the input of described technical grade panel computer is electrically connected to the output of described integrated treatment unit for showing the technical grade panel computer of short-wave signal spectrum information or ultrashort wave signal spectrum information.
The control end of described radio-frequency (RF) switch is electrically connected to the radio-frequency (RF) switch control signal output of integrated treatment unit.
Technical scheme two:
The instant dynamic spectrum detection method of shortwave/ultrashort wave, based on the instant dynamic spectrum detection system of above-mentioned shortwave/ultrashort wave, comprises the following steps:
S1: ultrashort wave reception antenna receives ultrashort wave signal, short-wave receiving antenna receives short-wave signal simultaneously, and the short-wave signal of reception is sent to the second input of radio-frequency (RF) switch; Ultrashort wave reception antenna is sent to the first frequency-selecting filter by ultrashort wave signal, and the first frequency-selecting filter carries out frequency-selective filtering to ultrashort wave signal, and the signal after frequency-selective filtering is sent to low noise amplifier; The signal of low noise amplifier after to frequency-selective filtering amplifies, and amplified signal is sent to tuned filter; Tuned filter carries out tuning filtering to the amplified signal receiving, and signal after tuning filtering is sent to the first frequency mixer; The first frequency mixer carries out mixing by signal after tuning filtering and the first local oscillation signal, and the intermediate-freuqncy signal generating after mixing is sent to the second frequency-selecting filter; The intermediate-freuqncy signal that the second frequency-selecting filter generates after to mixing is carried out frequency-selective filtering, and the intermediate-freuqncy signal after frequency-selective filtering is sent to the first intermediate frequency amplifier; The intermediate-freuqncy signal of the first intermediate frequency amplifier after to frequency-selective filtering amplified, and the intermediate-freuqncy signal after amplifying is sent to the first attenuator; The first attenuator is decayed to the intermediate-freuqncy signal after amplifying under the control of the first automatic gain control circuit, and the intermediate-freuqncy signal through attenuation processing is sent to the second frequency mixer; The first automatic gain control circuit, when control the first attenuator is decayed to the intermediate-freuqncy signal after amplifying, is sent to integrated treatment unit by the gain parameter of the first automatic gain control circuit; Described the second frequency mixer is receiving after the intermediate-freuqncy signal of attenuation processing, to the intermediate-freuqncy signal through attenuation processing and the second local oscillation signal are carried out to mixing, and the intermediate-freuqncy signal after mixing is sent to the second intermediate frequency amplifier; The intermediate-freuqncy signal of the second intermediate frequency amplifier after to mixing amplified, and the intermediate-freuqncy signal after amplifying is sent to band pass filter; Band pass filter carries out filtering to the intermediate-freuqncy signal after amplifying, and filtered intermediate-freuqncy signal is sent to the first controllable gain amplifier; The first controllable gain amplifier amplifies filtered intermediate-freuqncy signal under the control of the second automatic gain control circuit, and the intermediate-freuqncy signal after amplifying is exported to the first input end of radio-frequency (RF) switch; The second automatic gain control circuit, when control the first controllable gain amplifier amplifies filtered intermediate-freuqncy signal, is sent to integrated treatment unit by the gain parameter of the second automatic gain control circuit;
Radio-frequency (RF) switch, under the control of radio-frequency (RF) switch control signal, optionally receives the intermediate-freuqncy signal of short-wave signal or the output of the first controllable gain amplifier, and radio-frequency (RF) switch is sent to the second attenuator by the signal of reception;
S2: the signal that radio-frequency (RF) switch is sent to the second attenuator is intermediate frequency spectrum analysis module input signal, the second attenuator is after receiving intermediate frequency spectrum analysis module input signal, centering frequently spectrum analysis module input signal is carried out attenuation processing, and the signal through attenuation processing is sent to the second controllable gain amplifier; The second controllable gain amplifier, under the control of the 3rd automatic gain control circuit, amplifies the signal through attenuation processing, and the signal after amplifying is sent to low pass filter; The 3rd automatic gain control circuit, when control the second controllable gain amplifier carries out signal amplification, is sent to frequency spectrum perception unit by the gain parameter of the 3rd automatic gain control circuit; After the signal of low pass filter after receiving amplification, the signal after amplifying is carried out to low-pass filtering, and signal after low-pass filtering is sent to analog to digital converter; Analog to digital converter to low-pass filtering after signal carry out analog-to-digital conversion, and the digital signal of generation is sent to digital signal frequency mixer; Digital signal frequency mixer carries out Frequency mixing processing by the digital signal of reception and local oscillation signal, and the digital signal after mixing is sent to digital down converter; Digital down converter carries out down-converted to the digital signal to after mixing, and the digital signal after down-converted is sent to demodulator; The digital signal of demodulator after to down-converted carried out demodulation process, obtains digital baseband signal, and demodulator is by digital baseband signal and separate the local carrier frequency that timing adopts and be sent to frequency spectrum perception unit;
S3: the local carrier frequency of timing employing and the gain parameter of the 3rd automatic gain control circuit are separated according to digital baseband signal, demodulator in described frequency spectrum perception unit, draw described intermediate frequency spectrum analysis module input signal spectrum and energy value; Described frequency spectrum perception unit is sent to integrated treatment unit by the intermediate frequency spectrum analysis module input signal spectrum drawing and energy value;
S4: described integrated treatment unit is according to the gain parameter of the gain parameter of the first automatic gain control circuit, the second automatic gain control circuit and intermediate frequency spectrum analysis module input signal spectrum and energy value, draw short-wave signal spectrum information or ultrashort wave signal spectrum information, described short-wave signal spectrum information comprises the frequency spectrum of described short-wave signal and the energy value of described short-wave signal, and described ultrashort wave signal spectrum information comprises the frequency spectrum of described ultrashort wave signal and the energy value of described ultrashort wave signal;
Described integrated treatment unit is sent to technical grade panel computer by the short-wave signal spectrum information drawing or ultrashort wave signal spectrum information, and technical grade computer shows short-wave signal spectrum information or ultrashort wave signal spectrum information.
The feature of the technical program and further improvement are:
Described ultra-short wave receiver also comprises for generating the frequency of the first local oscillation signal and the second local oscillation signal and closes unit, described frequency closes unit and has input, the first output and the second output, described frequency closes the output of the input electrical connection integrated treatment unit of unit, the first output that described frequency closes unit is electrically connected to the local oscillator input of the first frequency mixer, and the second output that described frequency closes unit is electrically connected to the local oscillator input of the second frequency mixer;
In step S1, described integrated treatment unit generated frequency control word, and frequency control word is sent to and closes unit frequently; Described frequency closes unit and generates the first local oscillation signal and the second local oscillation signal according to frequency control word; Described frequency closes unit the first local oscillation signal is sent to the first frequency mixer, and described amalgamation unit is sent to the second frequency mixer by the second local oscillation signal.
Described step S3 specifically comprises following sub-step:
S31: digital baseband signal represents s, the plural form of digital baseband signal s is: s=i+jq, wherein, the real part of i representative digit baseband signal s, the imaginary part of q representative digit baseband signal s; Frequency spectrum perception unit is after receiving digital baseband signal s, demodulator and separating the gain parameter of local carrier frequency that timing adopts and the 3rd automatic gain control circuit, digital baseband signal s is carried out to Fourier transform, and the procedural representation of Fourier transform is:
FFT[s]＝FFT[i+jq]＝I(n)+jQ(n)
Wherein, FFT[] represent to carry out Fourier transform, I (n) representative digit baseband signal s carries out the real part of Fourier transform gained frequency-region signal, and Q (n) represents that word baseband signal s carries out the imaginary part of Fourier transform gained frequency-region signal, and n represents Frequency point; N is integer and 0≤n≤N-1, and what N was Fourier transform counts;
According to following formula, draw the energy value P in the numerical frequency territory that digital baseband signal s is corresponding e(n):
P e(n)＝10log 10[I 2(n)+Q 2(n)]
S32: set a radio-frequency signal source output energy value P sl; According to the gain parameter AGC3 of initial time the 3rd automatic gain control circuit, show that the second controllable gain amplifier is at the gain f of initial time (AGC3), initial time is designated as 0 constantly;
S32: the energy value P that finds out the numerical frequency territory that initial time digital baseband signal s is corresponding e(n) the maximum P in e(n i), P e(n i)=max[P e(n)], max[] represent to get maximum, n ifor integer and 0≤n i≤ N-1;
S33: draw the energy value of the intermediate frequency spectrum analysis module input signal that each Frequency point of initial time is corresponding according to following formula, initial time Frequency point n jcorresponding radio frequency energy value P (n j) be:
P(n j)＝P sl+ΔP e
Wherein, Δ P e=P e(n j)-P e(n i), n jfor integer and 0≤n j≤ N-1, P e(n j) numerical frequency territory medium frequency point n corresponding to expression initial time digital baseband signal s jthe energy value at place;
S34: integer variable m=1 is set, and 2..., according to the gain parameter AGC3 of the m moment the 3rd automatic gain control circuit m, show that the second controllable gain amplifier is at m gain f (AGC3 constantly m); Draw the energy value P in the m numerical frequency territory that digital baseband signal s is corresponding constantly em(n) the maximum P in em(n m), P em(n m)=max[P em(n)], max[] represent to get maximum, n mfor integer and 0≤n m≤ N-1;
Then according to following formula, draw m Frequency point n constantly mlocate the energy value P (n of corresponding intermediate frequency spectrum analysis module input signal m) be:
P(n m)＝P sl+ΔP em+Δf(AGC) m，
Wherein, Δ P em=P em(n m)-P e(n i), Δ f (AGC) m=f (AGC3 m)-f (AGC3);
The energy value that draws the intermediate frequency spectrum analysis module input signal that m each Frequency point place of the moment is corresponding according to following formula, the energy value P (n) of the intermediate frequency spectrum analysis module input signal that m moment Frequency point n place is corresponding is: P (n)=P (n m)+Δ P em', Δ P em'=P em(n)-P em(n m), P em(n) be the energy value at the m medium frequency point n place, numerical frequency territory that digital baseband signal s is corresponding constantly; N is integer and 0≤n≤N-1;
S35: utilize m moment demodulator to separate the local carrier frequency c that timing adopts m, drawing the frequency of the m intermediate frequency spectrum analysis module input signal that constantly each Frequency point is corresponding, the frequency of the m intermediate frequency spectrum analysis module input signal that Frequency point n is corresponding is constantly f nm, wherein, f srepresent sample frequency.
In step S1, described integrated treatment unit generated frequency control word, and frequency control word is sent to and closes unit frequently; Described frequency closes unit and generates the first local oscillation signal and the second local oscillation signal according to frequency control word; Described frequency closes unit the first local oscillation signal is sent to the first frequency mixer, and described amalgamation unit is sent to the second frequency mixer by the second local oscillation signal;
In step S1, integrated treatment unit generates radio-frequency (RF) switch control signal, then to radio-frequency (RF) switch, sends radio-frequency (RF) switch control signal;
In step S1, when integrated treatment unit controls radio-frequency (RF) switch receives the short-wave signal from short-wave antenna, the intermediate frequency spectrum analysis module input signal of step S3 is short-wave signal, thereby, in step S3, draw described short-wave signal spectrum information; In step S4, integrated treatment unit receives described short-wave signal spectrum information, and described shortwave spectrum information is sent to technical grade panel computer;
In step S1, when integrated treatment unit controls radio-frequency (RF) switch receives the intermediate-freuqncy signal from ultra-short wave receiver, the intermediate frequency spectrum analysis module input signal of step S3 is the intermediate-freuqncy signal that ultra-short wave receiver sends, thereby, in step S3, draw frequency spectrum and the energy value of described intermediate-freuqncy signal; In step S4, 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 m ultrashort wave signal that each Frequency point is corresponding constantly, the energy value P of the m ultrashort wave signal that Frequency point n is corresponding constantly svhf, mnfor: P svhf, mn=P (n)+f vhf, m(AGC1 m, AGC2 m), wherein, AGC1 mrepresent the m gain parameter of described the first automatic gain control circuit constantly, AGC2 mrepresent the m gain parameter of described the second automatic gain control circuit constantly, f vhf, m(AGC1 m, AGC2 m) attenuation of the expression m moment the first attenuator and the gain sum of the m moment the first controllable gain amplifier;
The frequency f of the m ultrashort wave signal that Frequency point n is corresponding constantly vhf, mnfor
f vhf,mn＝f nm+f syn
Wherein, f synrepresent the frequency control word that in step 1, integrated treatment unit generates.
Beneficial effect of the present invention is: 1) can provide reliable communication frequency for shortwave/ultrashort wave radio set; 2) adopt the method for base band signal process, can greatly reduce frequency spectrum perception unit resource requirement; 3) there is the feature of high-resolution, high sensitivity, wide frequency range; 4) the present invention adopts modularized design, and each module is relatively independent, is easy to debugging.
Accompanying drawing explanation
Fig. 1 is the first structural representation of the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave of the present invention;
Fig. 2 is the second circuit structural representation of ultra-short wave receiver of the present invention;
Fig. 3 is the second structural representation of the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave of the present invention;
Fig. 4 is the electrical block diagram of digitalization receiving subsystem at RF of the present invention unit.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
With reference to Fig. 1, it is the first structural representation of the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave of the present invention.The instant dynamic spectrum detection system of this shortwave/ultrashort wave comprises: radio-frequency (RF) switch, spectrum analysis display module (spectrum analyzer), for receiving the ultrashort wave antenna 1 of ultrashort wave signal (frequency is 30～512MHz) and 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), radio-frequency (RF) switch is provided with first input end, the second input, output and control end, the control end access radio-frequency (RF) switch control signal of radio-frequency (RF) switch, the first input end of radio-frequency (RF) switch is electrically connected to ultrashort wave antenna 1, the second input of radio-frequency (RF) switch is electrically connected to short-wave antenna 2, and the output of radio-frequency (RF) switch is electrically connected to the input of spectrum analysis display module.
Particularly, the present invention is also provided with ultra-short wave receiver.With reference to Fig. 2, it is the second circuit structural representation of ultra-short wave receiver of the present invention.Ultrashort wave antenna 1 is electrically connected to the first input end of radio-frequency (RF) switch by ultra-short wave receiver.The input of ultra-short wave receiver is electrically connected with ultrashort wave antenna.Ultra-short wave receiver comprises the first frequency-selecting filter being electrically connected to successively, low noise amplifier (Low Noise Amplifier, LNA), tuned filter, the first frequency mixer, the second frequency-selecting filter, the first intermediate frequency amplifier, the first attenuator, the second frequency mixer, the second intermediate frequency amplifier, band pass filter, and first controllable gain amplifier (the Variable Gain Amplifier, VGA), the input of above-mentioned the first frequency-selecting filter is electrically connected to ultrashort wave antenna 1, the local oscillator input of the first frequency mixer accesses the first local oscillation signal, the local oscillator input of above-mentioned the second frequency mixer accesses the second local oscillation signal, on the first attenuator, be provided with the first automatic gain and control (Automatic Gain Control, AGC) circuit, for controlling the first attenuator attenuation.On the first controllable gain amplifier, be provided with the second automatic gain control circuit, for controlling the gain of the first controllable gain amplifier.The output of the first controllable gain amplifier is electrically connected to the first input end of radio-frequency (RF) switch, and frequency spectrum display analysis module is electrically connected to respectively the gain parameter output of the first automatic gain control circuit and the gain parameter output of the second automatic gain control circuit.Like this, radio-frequency (RF) switch just can, under the control of radio-frequency (RF) switch control signal, optionally receive the signal from short-wave antenna or ultra-short wave receiver.In the embodiment of the present invention, each frequency-selecting filter is for the signal of input is carried out to frequency-selective filtering, and low noise amplifier, the first intermediate frequency amplifier, the second intermediate frequency amplifier and the first controllable gain amplifier are respectively used to the signal of input to amplify.Tuned filter is for carrying out tuning filtering to the signal of input, each frequency mixer is for carrying out Frequency mixing processing by the signal of input and local oscillation signal, the first attenuator is for decaying to the signal of input, and band pass filter is for carrying out bandpass filtering to the signal of input, like this, the ultrashort wave signal that ultra-short wave receiver receives is through after a series of processing, through the first controllable gain amplifier output intermediate-freuqncy signal (frequency is 21.4MHz).In the embodiment of the present invention, the second frequency-selecting filter is SAW (Surface Acoustic Wave) filter (Surface Acoustic Wave Filter, SAW).
In the embodiment of the present invention, ultra-short wave receiver also comprises for generating the frequency of the first local oscillation signal (frequency is 1130MHz～1612MHz) and the second local oscillation signal (frequency is 1078.6MHz) and closes unit, frequently close unit and there is input, the first output and the second output, the input that frequently closes unit is electrically connected to the output of integrated treatment unit, the first output that frequently closes unit is electrically connected to the local oscillator input of the first frequency mixer, and the second output that closes unit is frequently electrically connected to the local oscillator input of the second frequency mixer.In the embodiment of the present invention, integrated treatment unit generated frequency control word, and frequency control word is sent to and closes unit frequently; Frequently close unit and generate the first local oscillation signal and the second local oscillation signal according to frequency control word; Frequently close unit the first local oscillation signal is sent to the first frequency mixer, above-mentioned frequency closes unit the second local oscillation signal is sent to the second frequency mixer.Specifically, frequently close unit and generate the first local oscillation signal according to frequency control word, then according to the first local oscillation signal and frequency control word, generate the second local oscillation signal.Frequency control word adopts synchronous serial interface host-host protocol to transmit, and each frequency control word comprises 4 frequency words, and 8 bits of each frequency word adopt BCD coding.
With reference to Fig. 3, it is the second structural representation of the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave of the present invention.In the embodiment of the present invention, spectrum analysis display module comprises intermediate frequency spectrum analysis module.Intermediate frequency spectrum analysis module comprises digitalization receiving subsystem at RF unit, for changing intermediate frequency spectrum analysis module input signal into digital baseband signal.Intermediate frequency spectrum analysis module also comprises frequency spectrum perception unit, for drawing intermediate frequency spectrum analysis module input signal spectrum and energy value.Intermediate frequency spectrum analysis module input signal is the signal from radio-frequency (RF) switch that intermediate frequency spectrum analysis module receives.In embodiments of the present invention, frequency spectrum perception unit is mainly used to local electromagnetic environment to detect, and finds out unoccupied or disturbs less frequency channels, does not need to know detected user's information in advance.In conjunction with practical situations of the present invention, select Energy-aware technology, this is due in the time can 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, and fpga chip can adopt the Cyclone III family chip of ALTERA company.
In the embodiment of the present invention, between ultrashort wave antenna and ultra-short wave receiver, adopt RF cable transmission ultrashort wave signal, between short-wave antenna and radio-frequency (RF) switch, adopt RF cable transmission short-wave signal, between ultra-short wave receiver and radio-frequency (RF) switch, adopt RF cable transmission intermediate frequency signal, between radio-frequency (RF) switch and intermediate frequency spectrum analysis module, adopt RF cable signal transmission.
With reference to Fig. 4, it is the electrical block diagram of digitalization receiving subsystem at RF of the present invention unit.Digitalization receiving subsystem at RF unit comprises: the second attenuator being connected in series successively, the second controllable gain amplifier, low pass filter, analog to digital converter, digital signal frequency mixer, digital down converter and demodulator; On above-mentioned the second controllable gain amplifier, be provided with for controlling the 3rd automatic gain control circuit of the gain of the second controllable gain amplifier; The input of above-mentioned the second attenuator is electrically connected to the output of radio-frequency (RF) switch; The input of frequency spectrum perception unit is electrically connected to respectively the gain parameter output (not drawing in Fig. 4) of the 3rd automatic gain control circuit and the output of demodulator.The second attenuator is for decaying to the signal of input, the second controllable gain amplifier is for amplifying the signal of input, low pass filter is in the signal of input is carried out to low-pass filtering, analog to digital converter is for being converted to corresponding digital signal by the analog signal of input, digital signal frequency mixer is for the digital signal of input and local oscillation signal are carried out to mixing, and demodulator is for carrying out demodulation to the digital signal of input.Like this, 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 changes digital baseband signal into.Illustrate the implementation of digitalization receiving subsystem at RF unit below: the model of the second attenuator is DAT-31R5, the triode that the second controllable gain amplifier is 3SK131 by model and model are that the operational amplifier of LMH6703 forms, the model of analog to digital converter is AD9269, digital signal frequency mixer, digital down converter and demodulator are realized by fpga chip respectively, and fpga chip can adopt the Cyclone III family chip of ALTERA company.The function of digital signal frequency mixer, digital down converter, demodulator and frequency spectrum perception unit can realize on same fpga chip again.Especially, the second attenuator is numerical-control attenuator, and its control end is electrically connected with fpga chip, like this, can control the attenuation of the second attenuator by fpga chip.
In the embodiment of the present invention, spectrum analysis display module comprises: for according to the gain parameter of the gain parameter of the first automatic gain control circuit, the second automatic gain control circuit and intermediate frequency spectrum analysis module input signal spectrum and energy value, draw the integrated treatment unit of short-wave signal spectrum information or ultrashort wave signal spectrum information, intermediate frequency spectrum analysis module input signal refers to short-wave signal or from the intermediate-freuqncy signal of ultra-short wave receiver.The output of frequency spectrum perception unit is electrically connected to the input (when frequency spectrum perception unit sends data to integrated treatment unit, adopting MCBSP communication pattern to send data to integrated treatment unit) of integrated treatment unit.Short-wave signal spectrum information comprises the frequency spectrum of above-mentioned short-wave signal and the energy value of above-mentioned short-wave signal, and ultrashort wave signal spectrum information comprises the frequency spectrum of above-mentioned ultrashort wave signal and the energy value of above-mentioned ultrashort wave signal.In the embodiment of the present invention, integrated treatment unit comprises fpga chip and dsp chip, and its major function comprises the processing of frequency spectrum data and the control to each module.Wherein, fpga chip is mainly responsible for the realization of digital processing, various communication interface and agreement that amount of calculation is larger.Dsp chip is mainly responsible for network interface communication and is controlled function with part.
The following describes integrated treatment unit to the control of all the other elements or module and data interaction:
1) by ultra-short wave receiver, believe the synchronous serial interface of unit frequently, realize the FREQUENCY CONTROL to frequently closing unit; Read the ultra-short wave receiver letter parameters such as attenuator, amplifier, radio-frequency (RF) signal strength indication and the indication of intermediate-freuqncy signal intensity of unit frequently.
2) by the output data of MCBSP port received spectrum perception unit; By UART interface or SPI port centering frequency spectrum analysis module, carry out working state control.
3) to technical grade panel computer, sending data shows; Receive input instruction and the gps data of technical grade panel computer.
4) control the switching of radio-frequency (RF) switch, make radio-frequency (RF) switch optionally connect a road input signal.
5) integrated treatment unit also comprises power-switching circuit, power-switching circuit (is for example used for providing the required power supply in other module/unit, ultra-short wave receiver voltage is+24V, the voltage of intermediate frequency spectrum analysis module is+12V and+3.3V, the voltage of technical grade panel computer is+12V).
Spectrum analysis display module also comprises that the input of technical grade panel computer is electrically connected to the output of above-mentioned integrated treatment unit for showing the technical grade panel computer of short-wave signal spectrum information or ultrashort wave signal spectrum information.Specifically, technical grade panel computer is provided with application software, is used for showing amplitude-frequency spectrum information, can be used as control panel simultaneously, by keyboard, mouse, realized each unit is controlled with parameter and arranged, by built-in GPS module, carry out time synchronized, 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 expansion of 32G SD card;
6) panel degree of protection: IP65, dustproof 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 control end of radio-frequency (RF) switch is electrically connected to the radio-frequency (RF) switch control signal output of integrated treatment unit, like this, first integrated treatment unit generates radio-frequency (RF) switch control signal, then transmit it to the control end of radio-frequency (RF) switch, radio-frequency (RF) switch, under the control of radio-frequency (RF) switch control signal, just can be selected first input end or the second input and output connection.
In the embodiment of the present invention, can by technical grade panel computer (passing through touch-screen), to integrated treatment unit, send relevant control instruction, make integrated treatment unit generated frequency control word, radio-frequency (RF) switch control signal etc.In the embodiment of the present invention, also be provided with AC-DC AC/DC power module, AC-DC AC/DC power module input access 220V alternating current, be used for be converted to+24V of 220V alternating current direct voltage, again+24V direct current is transferred to the power-switching circuit of integrated treatment unit, by power-switching circuit, produces each module required voltage.The model of AC-DC power module is HPZ60S22024-T, maximum 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, based on the instant dynamic spectrum detection system of above-mentioned a kind of shortwave/ultrashort wave, has also proposed the instant dynamic spectrum detection method of a kind of shortwave/ultrashort wave.The instant dynamic spectrum detection method of this shortwave/ultrashort wave comprises the following steps:
S1: ultrashort wave reception antenna receives ultrashort wave signal, short-wave receiving antenna receives short-wave signal simultaneously, and the short-wave signal of reception is sent to the second input of radio-frequency (RF) switch; Ultrashort wave reception antenna is sent to the first frequency-selecting filter by ultrashort wave signal, and the first frequency-selecting filter carries out frequency-selective filtering to ultrashort wave signal, and the signal after frequency-selective filtering is sent to low noise amplifier; The signal of low noise amplifier after to frequency-selective filtering amplifies, and amplified signal is sent to tuned filter; Tuned filter carries out tuning filtering to the amplified signal receiving, and signal after tuning filtering is sent to the first frequency mixer; The first frequency mixer carries out mixing by signal after tuning filtering and the first local oscillation signal (frequency is 1130MHz～1612MHz), and the intermediate-freuqncy signal generating after mixing (frequency is 1100MHz) is sent to the second frequency-selecting filter; The intermediate-freuqncy signal that the second frequency-selecting filter generates after to mixing is carried out frequency-selective filtering, and the intermediate-freuqncy signal after frequency-selective filtering is sent to the first intermediate frequency amplifier; The intermediate-freuqncy signal of the first intermediate frequency amplifier after to frequency-selective filtering amplified, and the intermediate-freuqncy signal after amplifying is sent to the first attenuator; The first attenuator is decayed to the intermediate-freuqncy signal after amplifying under the control of the first automatic gain control circuit, and the intermediate-freuqncy signal through attenuation processing is sent to the second frequency mixer; The first automatic gain control circuit, when control the first attenuator is decayed to the intermediate-freuqncy signal after amplifying, is sent to integrated treatment unit by the gain parameter of the first automatic gain control circuit; Above-mentioned the second frequency mixer is receiving after the intermediate-freuqncy signal of attenuation processing, to the intermediate-freuqncy signal through attenuation processing and the second local oscillation signal (frequency is 1078.6MHz) are carried out to mixing, and the intermediate-freuqncy signal after mixing (frequency is 21.4MHz) is sent to the second intermediate frequency amplifier; The intermediate-freuqncy signal of the second intermediate frequency amplifier after to mixing amplified, and the intermediate-freuqncy signal after amplifying is sent to band pass filter; Band pass filter carries out filtering to the intermediate-freuqncy signal after amplifying, and filtered intermediate-freuqncy signal is sent to the first controllable gain amplifier; The first controllable gain amplifier amplifies filtered intermediate-freuqncy signal under the control of the second automatic gain control circuit, and the intermediate-freuqncy signal after amplifying is exported to the first input end of radio-frequency (RF) switch; The second automatic gain control circuit, when control the first controllable gain amplifier amplifies filtered intermediate-freuqncy signal, is sent to integrated treatment unit by the gain parameter of the second automatic gain control circuit;
Radio-frequency (RF) switch, under the control of radio-frequency (RF) switch control signal, optionally receives the intermediate-freuqncy signal of short-wave signal or the output of the first controllable gain amplifier, and radio-frequency (RF) switch is sent to the second attenuator by the signal of reception.It should be noted that, integrated treatment unit generates radio-frequency (RF) switch control signal, then to radio-frequency (RF) switch, sends radio-frequency (RF) switch control signal.
Specifically, in step S1, frequently close unit and generate the first local oscillation signal (frequency is 1130MHz～1612MHz) according to frequency control word, then according to the first local oscillation signal and frequency control word, generate the second local oscillation signal (frequency is 1078.6MHz).Frequency control word adopts synchronous serial interface host-host protocol to transmit, and each frequency control word comprises 4 frequency words, and 8 bits of each frequency word adopt BCD coding.
S2: the signal that radio-frequency (RF) switch is sent to the second attenuator is intermediate frequency spectrum analysis module input signal, the second attenuator is after receiving intermediate frequency spectrum analysis module input signal, centering frequently spectrum analysis module input signal is carried out attenuation processing, and the signal through attenuation processing is sent to the second controllable gain amplifier; The second controllable gain amplifier, under the control of the 3rd automatic gain control circuit, amplifies the signal through attenuation processing, and the signal after amplifying is sent to low pass filter; The 3rd automatic gain control circuit, when control the second controllable gain amplifier carries out signal amplification, is sent to frequency spectrum perception unit by the gain parameter of the 3rd automatic gain control circuit; After the signal of low pass filter after receiving amplification, the signal after amplifying is carried out to low-pass filtering, and signal after low-pass filtering is sent to analog to digital converter; Analog to digital converter to low-pass filtering after signal carry out analog-to-digital conversion, and the digital signal of generation is sent to digital signal frequency mixer; Digital signal frequency mixer carries out Frequency mixing processing to the digital signal and the local oscillation signal that receive, and the digital signal after mixing is sent to digital down converter; Digital down converter carries out down-converted to the digital signal to after mixing, and the digital signal after down-converted is sent to demodulator; The digital signal of demodulator after to down-converted carried out demodulation process, obtains digital baseband signal, and demodulator is by digital baseband signal and separate the local carrier frequency that timing adopts and be sent to frequency spectrum perception unit.
S3: the local carrier frequency of timing employing and the gain parameter of the 3rd automatic gain control circuit are separated according to digital baseband signal, demodulator in above-mentioned frequency spectrum perception unit, draw above-mentioned intermediate frequency spectrum analysis module input signal spectrum and energy value; Above-mentioned frequency spectrum perception unit is sent to integrated treatment unit by the intermediate frequency spectrum analysis module input signal spectrum drawing and energy value.
Particularly, step S3 specifically comprises following sub-step:
S31: digital baseband signal represents s, the plural form of digital baseband signal s is: s=i+jq, wherein, the real part of i representative digit baseband signal s, the imaginary part of q representative digit baseband signal s; Frequency spectrum perception unit is after receiving digital baseband signal s, demodulator and separating the gain parameter of local carrier frequency that timing adopts and the 3rd automatic gain control circuit, digital baseband signal s is carried out to Fourier transform, and the procedural representation of Fourier transform is:
FFT[s]＝FFT[i+jq]＝I(n)+jQ(n)
Wherein, FFT[] represent to carry out Fourier transform, I (n) representative digit baseband signal s carries out the real part of Fourier transform gained frequency-region signal, and Q (n) represents that word baseband signal s carries out the imaginary part of Fourier transform gained frequency-region signal, and n represents Frequency point; N is integer and 0≤n≤N-1, and what N was Fourier transform counts;
According to following formula, draw the energy value P in the numerical frequency territory that digital baseband signal s is corresponding e(n):
P e(n)＝10log 10[I 2(n)+Q 2(n)]
The energy value P in the numerical frequency territory that wherein, digital baseband signal s is corresponding e(n) unit is dB.
S32: set a radio-frequency signal source output energy value P sl(unit is dB); According to the gain parameter AGC3 of initial time the 3rd automatic gain control circuit, show that the second controllable gain amplifier is at the gain f of initial time (AGC3), initial time is designated as 0 constantly, and the unit of f (AGC3) is dB.
S32: the energy value P that finds out the numerical frequency territory that initial time digital baseband signal s is corresponding e(n) the maximum P in e(n i), P e(n i)=max[P e(n)], max[] represent to get maximum, n ifor integer and 0≤n i≤ N-1.
S33: draw the energy value of the intermediate frequency spectrum analysis module input signal that each Frequency point of initial time is corresponding according to following formula, initial time Frequency point n jcorresponding radio frequency energy value P (n j) be:
P(n j)＝P sl+ΔP e
Wherein, Δ P e=P e(n j)-P e(n i), n jfor integer and 0≤n j≤ N-1, P e(n j) numerical frequency territory medium frequency point n corresponding to expression initial time digital baseband signal s jthe energy value at place.
S34: integer variable m=1 is set, and 2..., according to the gain parameter AGC3 of the m moment the 3rd automatic gain control circuit m(for example, the gain parameter of the 3rd automatic gain control circuit is the gain of the second controllable gain amplifier), show that the second controllable gain amplifier is at m gain f (AGC3 constantly m); Draw the maximum P in the energy value in the m numerical frequency territory that constantly digital baseband signal s is corresponding em(n m), P em(n m)=max[P em(n)], max[] represent to get maximum, n mfor integer and 0≤n m≤ N-1.
Then according to following formula, draw m Frequency point n constantly mlocate the energy value P (n of corresponding intermediate frequency spectrum analysis module input signal m) be:
P(n m)＝P sl+ΔP em+Δf(AGC) m，
Wherein, Δ P em=P em(n m)-P e(n i), Δ f (AGC) m=f (AGC3 m)-f (AGC3).
The energy value that draws the intermediate frequency spectrum analysis module input signal that m each Frequency point place of the moment is corresponding according to following formula, the energy value P (n) of the intermediate frequency spectrum analysis module input signal that m moment Frequency point n place is corresponding is: P (n)=P (n m)+Δ P em', Δ P em'=P em(n)-P em(n m), P em(n) be the energy value at the m medium frequency point n place, numerical frequency territory that digital baseband signal s is corresponding constantly; N is integer and 0≤n≤N-1.
S35: utilize m moment demodulator to separate the local carrier frequency c that timing adopts m, drawing the frequency of the m intermediate frequency spectrum analysis module input signal that constantly each Frequency point is corresponding, the frequency of the m intermediate frequency spectrum analysis module input signal that Frequency point n is corresponding is constantly f nm, wherein, f ssample frequency (for example, the f that represents analog to digital converter sfor 9.6kHz).
As from the foregoing, when carrying out Logarithmic calculation, multiplication and division have all become linear operation, so sub-step S31 is linear calculating to the computational process of sub-step S35; Filter parameter in digitalization receiving subsystem at RF cell processing is all fixed simultaneously, so to different intermediate frequency spectrum analysis module input signals, can not consider the impact of filter, so adopt above-mentioned computational methods the difference of the energy value in baseband signal numerical frequency territory can be reacted directly on the energy value of intermediate frequency spectrum analysis module input signal.
S4: above-mentioned integrated treatment unit is according to the gain parameter of the gain parameter of the first automatic gain control circuit, the second automatic gain control circuit and intermediate frequency spectrum analysis module input signal spectrum and energy value, draw short-wave signal spectrum information or ultrashort wave signal spectrum information, above-mentioned short-wave signal spectrum information comprises the frequency spectrum of above-mentioned short-wave signal and the energy value of above-mentioned short-wave signal, and above-mentioned ultrashort wave signal spectrum information comprises the frequency spectrum of above-mentioned ultrashort wave signal and the energy value of above-mentioned ultrashort wave signal.
Above-mentioned integrated treatment unit is sent to technical grade panel computer by the short-wave signal spectrum information drawing or ultrashort wave signal spectrum information, and technical grade computer shows short-wave signal spectrum information or ultrashort wave signal spectrum information.
Particularly, in step S1, when integrated treatment unit controls radio-frequency (RF) switch receives the short-wave signal from short-wave antenna, the intermediate frequency spectrum analysis module input signal of step S3 is short-wave signal, thereby, in step S3, draw above-mentioned short-wave signal spectrum information; In step S4, integrated treatment unit receives above-mentioned short-wave signal spectrum information, and above-mentioned shortwave spectrum information is sent to technical grade panel computer;
In step S1, when integrated treatment unit controls radio-frequency (RF) switch receives the intermediate-freuqncy signal from ultra-short wave receiver, the intermediate frequency spectrum analysis module input signal of step S3 is the intermediate-freuqncy signal that ultra-short wave receiver sends, thereby, in step S3, draw frequency spectrum and the energy value of above-mentioned intermediate-freuqncy signal; In step S4, 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 m ultrashort wave signal that each Frequency point is corresponding constantly, the energy value P of the m ultrashort wave signal that Frequency point n is corresponding constantly svhf, mnfor: P svhf, mn=P (n)+f vhf, m(AGC1 m, AGC2 m), wherein, AGC1 mrepresent the m gain parameter (for example, the gain parameter of the first automatic gain control circuit is the attenuation coefficient of the first attenuator) of above-mentioned the first automatic gain control circuit constantly, AGC2 mrepresent the m gain parameter (for example, the gain parameter of the second automatic gain control circuit is the gain of the first controllable gain amplifier) of above-mentioned the second automatic gain control circuit constantly, f vhf, m(AGC1 m, AGC2 m) attenuation of the expression m moment the first attenuator and the gain sum of the m moment the first controllable gain amplifier;
The frequency f of the m ultrashort wave signal that Frequency point n is corresponding constantly vhf, mnfor
f vhf,mn＝f nm+f syn
Wherein, f vhf, mnrepresent the frequency control word that in step 1, integrated treatment unit generates, in the embodiment of the present invention, f vhf, mnat 30MHz between 512MHz.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (8)

1. the instant dynamic spectrum detection system of shortwave/ultrashort wave, it is characterized in that, comprising: radio-frequency (RF) switch, spectrum analysis display module, for receiving the ultrashort wave antenna (1) of ultrashort wave signal 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 is provided with first input end, the second input, output and control end, the control end access radio-frequency (RF) switch control signal of described radio-frequency (RF) switch, the first input end of described radio-frequency (RF) switch is electrically connected to ultrashort wave antenna (1), the second input of described radio-frequency (RF) switch is electrically connected to short-wave antenna (2), and the output of described radio-frequency (RF) switch is electrically connected to the input of spectrum analysis display module.
2. the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave as claimed in claim 1, is characterized in that, also comprises ultra-short wave receiver, and described ultrashort wave antenna (1) is electrically connected to 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 (1); Described ultra-short wave receiver comprises the first frequency-selecting filter, low noise amplifier, tuned filter, the first frequency mixer, the second frequency-selecting filter, the first intermediate frequency amplifier, the first attenuator, the second frequency mixer, the second intermediate frequency amplifier, band pass filter and the first controllable gain amplifier being electrically connected to successively, the input of described the first frequency-selecting filter is electrically connected to described ultrashort wave antenna (1), the local oscillator input of described the first frequency mixer accesses the first local oscillation signal, and the local oscillator input of described the second frequency mixer accesses the second local oscillation signal; On described the first attenuator, be provided with for controlling the first automatic gain control circuit of the first attenuator attenuation, on described the first controllable gain amplifier, be provided with for controlling the second automatic gain control circuit of the gain of the first controllable gain amplifier; The output of described the first controllable gain amplifier is electrically connected to the first input end of described radio-frequency (RF) switch, and described frequency spectrum display analysis module is electrically connected to respectively the gain parameter output of the first automatic gain control circuit and the gain parameter output of the second automatic gain control circuit.
3. the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave as claimed in claim 2, is characterized in that, described spectrum analysis display module comprises intermediate frequency spectrum analysis module; Described intermediate frequency spectrum analysis module comprises for intermediate frequency spectrum analysis module input signal being changed into the digitalization receiving subsystem at RF unit of digital baseband signal and for drawing the frequency spectrum perception unit of intermediate frequency spectrum analysis module input signal spectrum and energy value; Described intermediate frequency spectrum analysis module input signal is the signal from radio-frequency (RF) switch that intermediate frequency spectrum analysis module receives; Described digitalization receiving subsystem at RF unit comprises: the second attenuator being connected in series successively, the second controllable gain amplifier, low pass filter, analog to digital converter, digital signal frequency mixer, digital down converter and demodulator; On described the second controllable gain amplifier, be provided with for controlling the 3rd automatic gain control circuit of the gain of the second controllable gain amplifier; The input of described the second attenuator is electrically connected to the output of radio-frequency (RF) switch; The input of described frequency spectrum perception unit is electrically connected to respectively the gain parameter output of the 3rd automatic gain control circuit and the output of demodulator;
Described spectrum analysis display module comprises: for according to the gain parameter of the gain parameter of the first automatic gain control circuit, the second automatic gain control circuit and intermediate frequency spectrum analysis module input signal spectrum and energy value, draw the integrated treatment unit of short-wave signal spectrum information or ultrashort wave signal spectrum information, the output of described frequency spectrum perception unit is electrically connected to the input of described integrated treatment unit; Described short-wave signal spectrum information comprises the frequency spectrum of described short-wave signal and the energy value of described short-wave signal, and described ultrashort wave signal spectrum information comprises the frequency spectrum of described ultrashort wave signal and the energy value of described ultrashort wave signal;
Described spectrum analysis display module also comprises that the input of described technical grade panel computer is electrically connected to the output of described integrated treatment unit for showing the technical grade panel computer of short-wave signal spectrum information or ultrashort wave signal spectrum information.
4. the instant dynamic spectrum detection system of a kind of shortwave/ultrashort wave as claimed in claim 3, is characterized in that, the control end of described radio-frequency (RF) switch is electrically connected to the radio-frequency (RF) switch control signal output of integrated treatment unit.
5. the instant dynamic spectrum detection method of shortwave/ultrashort wave, based on the instant dynamic spectrum detection system of shortwave/ultrashort wave as claimed in claim 3, is characterized in that, comprises the following steps:
S1: ultrashort wave reception antenna receives ultrashort wave signal, short-wave receiving antenna receives short-wave signal simultaneously, and the short-wave signal of reception is sent to the second input of radio-frequency (RF) switch; Ultrashort wave reception antenna is sent to the first frequency-selecting filter by ultrashort wave signal, and the first frequency-selecting filter carries out frequency-selective filtering to ultrashort wave signal, and the signal after frequency-selective filtering is sent to low noise amplifier; The signal of low noise amplifier after to frequency-selective filtering amplifies, and amplified signal is sent to tuned filter; Tuned filter carries out tuning filtering to the amplified signal receiving, and signal after tuning filtering is sent to the first frequency mixer; The first frequency mixer carries out mixing by signal after tuning filtering and the first local oscillation signal, and the intermediate-freuqncy signal generating after mixing is sent to the second frequency-selecting filter; The intermediate-freuqncy signal that the second frequency-selecting filter generates after to mixing is carried out frequency-selective filtering, and the intermediate-freuqncy signal after frequency-selective filtering is sent to the first intermediate frequency amplifier; The intermediate-freuqncy signal of the first intermediate frequency amplifier after to frequency-selective filtering amplified, and the intermediate-freuqncy signal after amplifying is sent to the first attenuator; The first attenuator is decayed to the intermediate-freuqncy signal after amplifying under the control of the first automatic gain control circuit, and the intermediate-freuqncy signal through attenuation processing is sent to the second frequency mixer; The first automatic gain control circuit, when control the first attenuator is decayed to the intermediate-freuqncy signal after amplifying, is sent to integrated treatment unit by the gain parameter of the first automatic gain control circuit; Described the second frequency mixer is receiving after the intermediate-freuqncy signal of attenuation processing, to the intermediate-freuqncy signal through attenuation processing and the second local oscillation signal are carried out to mixing, and the intermediate-freuqncy signal after mixing is sent to the second intermediate frequency amplifier; The intermediate-freuqncy signal of the second intermediate frequency amplifier after to mixing amplified, and the intermediate-freuqncy signal after amplifying is sent to band pass filter; Band pass filter carries out filtering to the intermediate-freuqncy signal after amplifying, and filtered intermediate-freuqncy signal is sent to the first controllable gain amplifier; The first controllable gain amplifier amplifies filtered intermediate-freuqncy signal under the control of the second automatic gain control circuit, and the intermediate-freuqncy signal after amplifying is exported to the first input end of radio-frequency (RF) switch; The second automatic gain control circuit, when control the first controllable gain amplifier amplifies filtered intermediate-freuqncy signal, is sent to integrated treatment unit by the gain parameter of the second automatic gain control circuit;
Radio-frequency (RF) switch, under the control of radio-frequency (RF) switch control signal, optionally receives the intermediate-freuqncy signal of short-wave signal or the output of the first controllable gain amplifier, and radio-frequency (RF) switch is sent to the second attenuator by the signal of reception;
S2: the signal that radio-frequency (RF) switch is sent to the second attenuator is intermediate frequency spectrum analysis module input signal, the second attenuator is after receiving intermediate frequency spectrum analysis module input signal, centering frequently spectrum analysis module input signal is carried out attenuation processing, and the signal through attenuation processing is sent to the second controllable gain amplifier; The second controllable gain amplifier, under the control of the 3rd automatic gain control circuit, amplifies the signal through attenuation processing, and the signal after amplifying is sent to low pass filter; The 3rd automatic gain control circuit, when control the second controllable gain amplifier carries out signal amplification, is sent to frequency spectrum perception unit by the gain parameter of the 3rd automatic gain control circuit; After the signal of low pass filter after receiving amplification, the signal after amplifying is carried out to low-pass filtering, and signal after low-pass filtering is sent to analog to digital converter; Analog to digital converter to low-pass filtering after signal carry out analog-to-digital conversion, and the digital signal of generation is sent to digital signal frequency mixer; Digital signal frequency mixer carries out Frequency mixing processing by the digital signal of reception and local oscillation signal, and the digital signal after mixing is sent to digital down converter; Digital down converter carries out down-converted to the digital signal to after mixing, and the digital signal after down-converted is sent to demodulator; The digital signal of demodulator after to down-converted carried out demodulation process, obtains digital baseband signal, and demodulator is by digital baseband signal and separate the local carrier frequency that timing adopts and be sent to frequency spectrum perception unit;
S3: the local carrier frequency of timing employing and the gain parameter of the 3rd automatic gain control circuit are separated according to digital baseband signal, demodulator in described frequency spectrum perception unit, draw described intermediate frequency spectrum analysis module input signal spectrum and energy value; Described frequency spectrum perception unit is sent to integrated treatment unit by the intermediate frequency spectrum analysis module input signal spectrum drawing and energy value;
S4: described integrated treatment unit is according to the gain parameter of the gain parameter of the first automatic gain control circuit, the second automatic gain control circuit and intermediate frequency spectrum analysis module input signal spectrum and energy value, draw short-wave signal spectrum information or ultrashort wave signal spectrum information, described short-wave signal spectrum information comprises the frequency spectrum of described short-wave signal and the energy value of described short-wave signal, and described ultrashort wave signal spectrum information comprises the frequency spectrum of described ultrashort wave signal and the energy value of described ultrashort wave signal;
Described integrated treatment unit is sent to technical grade panel computer by the short-wave signal spectrum information drawing or ultrashort wave signal spectrum information, and technical grade computer shows short-wave signal spectrum information or ultrashort wave signal spectrum information.
6. the instant dynamic spectrum detection method of a kind of shortwave/ultrashort wave as claimed in claim 5, it is characterized in that, described ultra-short wave receiver also comprises for generating the frequency of the first local oscillation signal and the second local oscillation signal and closes unit, described frequency closes unit and has input, the first output and the second output, described frequency closes the output of the input electrical connection integrated treatment unit of unit, the first output that described frequency closes unit is electrically connected to the local oscillator input of the first frequency mixer, and the second output that described frequency closes unit is electrically connected to the local oscillator input of the second frequency mixer;
In step S1, described integrated treatment unit generated frequency control word, and frequency control word is sent to and closes unit frequently; Described frequency closes unit and generates the first local oscillation signal and the second local oscillation signal according to frequency control word; Described frequency closes unit the first local oscillation signal is sent to the first frequency mixer, and described amalgamation unit is sent to the second frequency mixer by the second local oscillation signal.
7. the instant dynamic spectrum detection method of a kind of shortwave/ultrashort wave as claimed in claim 5, is characterized in that, described step S3 specifically comprises following sub-step:
S31: digital baseband signal represents s, the plural form of digital baseband signal s is: s=i+jq, wherein, the real part of i representative digit baseband signal s, the imaginary part of q representative digit baseband signal s; Frequency spectrum perception unit is after receiving digital baseband signal s, demodulator and separating the gain parameter of local carrier frequency that timing adopts and the 3rd automatic gain control circuit, digital baseband signal s is carried out to Fourier transform, and the procedural representation of Fourier transform is:
FFT[s]＝FFT[i+jq]＝I(n)+jQ(n)
Wherein, FFT[] represent to carry out Fourier transform, I (n) representative digit baseband signal s carries out the real part of Fourier transform gained frequency-region signal, and Q (n) represents that word baseband signal s carries out the imaginary part of Fourier transform gained frequency-region signal, and n represents Frequency point; N is integer and 0≤n≤N-1, and what N was Fourier transform counts;
According to following formula, draw the energy value P in the numerical frequency territory that digital baseband signal s is corresponding e(n):
P e(n)＝10log 10[I 2(n)+Q 2(n)]
S32: set a radio-frequency signal source output energy value P sl; According to the gain parameter AGC3 of initial time the 3rd automatic gain control circuit, show that the second controllable gain amplifier is at the gain f of initial time (AGC3), initial time is designated as 0 constantly;
S32: the energy value P that finds out the numerical frequency territory that initial time digital baseband signal s is corresponding e(n) the maximum P in e(n i), P e(n i)=max[P e(n)], max[] represent to get maximum, n ifor integer and 0≤n i≤ N-1;
S33: draw the energy value of the intermediate frequency spectrum analysis module input signal that each Frequency point of initial time is corresponding according to following formula, initial time Frequency point n jcorresponding radio frequency energy value P (n j) be:
P(n j)＝P sl+ΔP e
Wherein, Δ P e=P e(n j)-P e(n i), n jfor integer and 0≤n j≤ N-1, P e(n j) numerical frequency territory medium frequency point n corresponding to expression initial time digital baseband signal s jthe energy value at place;
S34: integer variable m=1 is set, and 2..., according to the gain parameter AGC3 of the m moment the 3rd automatic gain control circuit m, show that the second controllable gain amplifier is at m gain f (AGC3 constantly m); Draw the energy value P in the m numerical frequency territory that digital baseband signal s is corresponding constantly em(n) the maximum P in em(n m), P em(n m)=max[P em(n)], max[] represent to get maximum, n mfor integer and 0≤n m≤ N-1;
Then according to following formula, draw m Frequency point n constantly mlocate the energy value P (n of corresponding intermediate frequency spectrum analysis module input signal m) be:
P(n m)＝P sl+ΔP em+Δf(AGC) m，
Wherein, Δ P em=P em(n m)-P e(n i), Δ f (AGC) m=f (AGC3 m)-f (AGC3);
The energy value that draws the intermediate frequency spectrum analysis module input signal that m each Frequency point place of the moment is corresponding according to following formula, the energy value P (n) of the intermediate frequency spectrum analysis module input signal that m moment Frequency point n place is corresponding is: P (n)=P (n m)+Δ P em', Δ P em'=P em(n)-P em(n m), P em(n) be the energy value at the m medium frequency point n place, numerical frequency territory that digital baseband signal s is corresponding constantly; N is integer and 0≤n≤N-1;
S35: utilize m moment demodulator to separate the local carrier frequency c that timing adopts m, drawing the frequency of the m intermediate frequency spectrum analysis module input signal that constantly each Frequency point is corresponding, the frequency of the m intermediate frequency spectrum analysis module input signal that Frequency point n is corresponding is constantly f nm, wherein, f srepresent sample frequency.
8. the instant dynamic spectrum detection method of a kind of shortwave/ultrashort wave as claimed in claim 7, it is characterized in that, described ultra-short wave receiver also comprises for generating the frequency of the first local oscillation signal and the second local oscillation signal and closes unit, described frequency closes unit and has input, the first output and the second output, described frequency closes the output of the input electrical connection integrated treatment unit of unit, the first output that described frequency closes unit is electrically connected to the local oscillator input of the first frequency mixer, and the second output that described frequency closes unit is electrically connected to the local oscillator input of the second frequency mixer; The control end of described radio-frequency (RF) switch is electrically connected to the radio-frequency (RF) switch control signal output of integrated treatment unit;
In step S1, described integrated treatment unit generated frequency control word, and frequency control word is sent to and closes unit frequently; Described frequency closes unit and generates the first local oscillation signal and the second local oscillation signal according to frequency control word; Described frequency closes unit the first local oscillation signal is sent to the first frequency mixer, and described amalgamation unit is sent to the second frequency mixer by the second local oscillation signal;
In step S1, integrated treatment unit generates radio-frequency (RF) switch control signal, then to radio-frequency (RF) switch, sends radio-frequency (RF) switch control signal;
In step S1, when integrated treatment unit controls radio-frequency (RF) switch receives the short-wave signal from short-wave antenna, the intermediate frequency spectrum analysis module input signal of step S3 is short-wave signal, thereby, in step S3, draw described short-wave signal spectrum information; In step S4, integrated treatment unit receives described short-wave signal spectrum information, and described shortwave spectrum information is sent to technical grade panel computer;
In step S1, when integrated treatment unit controls radio-frequency (RF) switch receives the intermediate-freuqncy signal from ultra-short wave receiver, the intermediate frequency spectrum analysis module input signal of step S3 is the intermediate-freuqncy signal that ultra-short wave receiver sends, thereby, in step S3, draw frequency spectrum and the energy value of described intermediate-freuqncy signal; In step S4, 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 m ultrashort wave signal that each Frequency point is corresponding constantly, the energy value P of the m ultrashort wave signal that Frequency point n is corresponding constantly svhf, mnfor: P svhf, mn=P (n)+f vhf, m(AGC1 m, AGC2 m), wherein, AGC1 mrepresent the m gain parameter of described the first automatic gain control circuit constantly, AGC2 mrepresent the m gain parameter of described the second automatic gain control circuit constantly, f vhf, m(AGC1 m, AGC2 m) attenuation of the expression m moment the first attenuator and the gain sum of the m moment the first controllable gain amplifier;
The frequency f of the m ultrashort wave signal that Frequency point n is corresponding constantly vhf, mnfor
f vhf,mn＝f nm+f syn
Wherein, f synrepresent the frequency control word that in step 1, integrated treatment unit generates.
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