CN103634024B - A kind of apparatus and method realizing signal analysis instrument spread spectrum function - Google Patents

A kind of apparatus and method realizing signal analysis instrument spread spectrum function Download PDF

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CN103634024B
CN103634024B CN201310616148.3A CN201310616148A CN103634024B CN 103634024 B CN103634024 B CN 103634024B CN 201310616148 A CN201310616148 A CN 201310616148A CN 103634024 B CN103634024 B CN 103634024B
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frequency
spread spectrum
signal
analysis instrument
signal analysis
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CN201310616148.3A
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CN103634024A (en
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杜以涛
许建华
杜会文
崔素玲
周钦山
郭小文
闫亚力
张明岳
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中国电子科技集团公司第四十一研究所
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Abstract

The invention belongs to signal processing technology field, relate to a kind of apparatus and method realizing signal analysis instrument spread spectrum function, device comprises: waveguide adaptor, first wave guide switch, the second waveguide switch, high pass filter, low pass filter, fundamental mixer, spot-frequency local oscillation and intermediate frequency filtering amplifier.Its method comprises: first foundation main frame preselector coverage is to the IF-FRE scope F of spread spectrum device iFlimit, then according to device frequency range F rFand F iFcollocation point is local frequency F frequently lO, be secondly that wave band division is carried out in Optimal Filter design, low-frequency range utilizes frequency conversion formula (F rF-F lO), coordinate low pass filter; High band utilizes frequency conversion formula (F lO-F rF), coordinate high pass filter, comprehensively realize signal analysis instrument spread spectrum function.The present invention can realize image signal suppression signal analysis instrument spread spectrum function in frequency range higher than still possessing during 67GHz.

Description

A kind of apparatus and method realizing signal analysis instrument spread spectrum function

Technical field

The present invention relates to signal analysis instrument spread spectrum, particularly relate to a kind of apparatus and method realizing signal analysis instrument spread spectrum function, belong to signal processing technology field.

Background technology

Carrying out parameter testing to signal has multiple instrument at present.Single have frequency meter to the instrument and equipment that frequency parameter is measured, and single have power meter to the instrument and equipment that signal amplitude is measured, and comprehensive two kinds of functions are signal analysis instruments in one, and be characterized in measuring frequency wide ranges, amplitude measurement scope is large.

Current signal input connector has two types: coaxial and waveguide.Coaxial connector is applicable to lower frequency range, and waveguide connector is applicable to higher frequency range.The coaxial measurement range of signal analysis instrument main frame is generally between DC ~ 67GHz, and higher measuring frequency scope limits by input signal connector characteristic, general employing spread spectrum mode realizes, local oscillator by main frame is drawn, carry out harmonic mixing in spread spectrum module inside with input signal, the intermediate-freuqncy signal of generation turns back in main frame and processes further.The spread spectrum device of prior art all adopts high order harmonic component mixing schemes, according to presetting mixing formula, utilizes main frame local oscillator to export and intermediate frequency input interface, configures corresponding control algolithm, realize the expansion of signal analysis instrument measuring frequency scope.But often there is following defect: 1, current frequency mixer front end is normally used for filtering image response (in optical mixing process, two input signals energy and same frequency local oscillation signal is had to produce identical intermediate-freuqncy signal, their intermediate frequencies lower than local oscillator, an intermediate frequency higher than local oscillator, one of them signal is called the image response of another signal) preselector, cannot realize with super band higher than 67GHz, 2, current common spread spectrum module adopts higher harmonics number of times, the low-IF frequency way of output, directly enters main frame intermediate-frequency channel, cannot filtering image signal, 3, the image response of current common spread spectrum module suppresses and adopts instrument built in content software algorithm, spurious signal is utilized to have the advantages that to change with local frequency, scan at twice, local frequency difference is that (IF is the IF-FRE of signal analysis instrument to 2IF/n, n is the harmonic mixing number of times of spread spectrum module), minimizing operation is carried out to measurement result, the signal do not changed with local oscillator is like this signal of necessary being, but due to software algorithm relation, signal amplitude is less than normal than actual value, and all need two times result to carry out superposition at every turn, cause measuring speed slack-off, do not meet signal analysis instrument amplitude measurement accuracy high, the demand that measuring speed is fast, 4, image response suppresses also to adopt instrument external control software algorithm or manual calculations mode, according to IF-FRE and the harmonic number of concrete instrument, calculate the frequency interval of each response point, actual signal and spurious signal can be distinguished by the account form of harmonic mixing, not only need very strong instrument to form professional knowledge, and need be separated spurious signal long computing time, measuring speed is slower, does not meet test request, 5, existing spread spectrum mode adopts the conversion loss of harmonic mixing mode to increase, and reduces weak-signal measurement ability to main frame.

Therefore, can design a kind of novel signal analysis instrument spread spectrum device and spectrum spreading method thereof to overcome above-mentioned defect, becoming those skilled in the art has technical barrier to be solved.

Summary of the invention

Because the above-mentioned defect of prior art, the present invention aims to provide a kind of device and method realizing signal analysis instrument spread spectrum function, spectrum analysis spread spectrum function can be still possessed higher than during 67GHz in frequency range, and the suppression of mirror image, multiple spurious signal can be realized, and do not reduce weak-signal measurement ability.

Realization of the present invention, this device realizing signal analysis instrument spread spectrum function comprises: waveguide adaptor, first wave guide switch, second waveguide switch, high pass filter, low pass filter, fundamental mixer, spot-frequency local oscillation and intermediate frequency filtering amplifier, wherein, waveguide adaptor is connected with first wave guide switch, first wave guide switch respectively with high pass filter, the input of low pass filter connects, high pass filter, the output of low pass filter is connected with the second waveguide switch respectively, second waveguide switch, fundamental mixer is connected in turn with spot-frequency local oscillation, fundamental mixer is connected with intermediate frequency filtering amplifier.

In some technical schemes, the local frequency scope F of spot-frequency local oscillation lOmeet following requirement: F lO=2*n*YTO, wherein n is the harmonic mixing number of times of spread spectrum module, and YTO is yttrium iron garnet oscillator output frequencies.

In some technical schemes, intermediate frequency output area F iF=local frequency scope F lO-input signal frequency range F rF, or intermediate frequency output area F iF=input signal frequency range F rF-local frequency scope F lO.

In some technical schemes, intermediate frequency output area F iFcover in frequency range at signal analysis instrument main frame preselector.

In some technical schemes, yttrium iron garnet oscillator output frequencies 3.1 ~ 9.9GHz, step value is 200MHz.

In some technical schemes, intermediate frequency output area F iFbetween 4 ~ 26.5GHz.

The invention also discloses a kind of method realizing signal analysis instrument spread spectrum function, comprise the steps:

Step one, is connected with signal analysis instrument main frame as follows by spread spectrum device: signal analysis instrument main frame is connected to first wave guide switch, the second waveguide switch, spot-frequency local oscillation and intermediate frequency filtering amplifier in spread spectrum device;

Step 2, to waveguide adaptor input signal, signal enters first wave guide switch through waveguide adaptor;

Step 3, according to the state parameter that signal analysis instrument main frame is arranged, the waveguide switch state in configuration spread spectrum device, makes signal through different filters, is in different working frequency range;

Step 4, synthesizes a road by the signal after low-pass filtering and high-pass filtering after the second waveguide switch, sends into fundamental mixer and spot-frequency local oscillation mixing;

Step 5, adopts the conversion loss of intermediate frequency filtering amplifier offset frequency mixer, improves the amplitude entering host signal;

Step 6, sends into the rf inputs mouth of signal analysis instrument main frame, realizes the multiplexing of the preselector in main frame, filtering image signal by intermediate-freuqncy signal, and enters intermediate frequency amplification filtering resampling process.

In some technical schemes, the local frequency scope F of spot-frequency local oscillation lOmeet following requirement: F lO=2*n*YTO, wherein n is the harmonic mixing number of times of spread spectrum module, and YTO is yttrium iron garnet oscillator output frequencies.

In some technical schemes, yttrium iron garnet oscillator output frequencies 3.1 ~ 9.9GHz, step value is 200MHz.

In some technical schemes, described intermediate frequency output area F iFbetween 4 ~ 26.5GHz.

In some technical schemes, according to the IF-FRE scope F of spread spectrum device iFwithin the scope of signal analysis instrument main frame preselector covering frequence, according to fundamental wave mixing computing formula successively collocation point local frequency scope F frequently lOand between filter inhibition zone, comprehensively realize image frequency and suppress and spread spectrum function.

In some technical schemes, according to spread spectrum device input signal frequency range, spot-frequency local oscillation frequency range F lOwith IF-FRE scope F iFconfiguration, synthesize and coordinate and wave band division carried out to spread spectrum device overlay area.

In some technical schemes, low-frequency range utilizes frequency conversion formula: input signal frequency range F rF-local frequency scope F lO, coordinate the high pass characteristic of waveguide device and low pass filter combination to realize image frequency signal and suppress.

In some technical schemes, high band utilizes frequency conversion formula: local frequency scope F iO-input signal frequency range F rF, coordinate high pass filter, realize image frequency signal and suppress.

Compared with prior art, beneficial effect of the present invention is as follows:

1. realize spread spectrum function by special testing apparatus and multiplexing preselector, hardware implementing mirror image suppresses, and without the need to repeatedly software computing, improves measuring speed, can realize spectrum analysis function within the scope of millimeter wave frequency band;

2. fundamental wave mixing mode increases substantially weak-signal measurement ability and accuracy of measurement.

Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation realizing the device of signal analysis instrument spread spectrum function of the present invention.

Fig. 2 is a kind of schematic diagram realizing the method for signal analysis instrument spread spectrum function of the present invention.

Fig. 3 a is that existing spread spectrum device does not add software signal recognizer test design sketch.

Fig. 3 b is that existing spread spectrum device adds common software signal Recognition Algorithm test design sketch.

Fig. 3 c is spread spectrum device and method application testing design sketch of the present invention.

Symbol description

1 waveguide adaptor

2 first wave guide switches (waveguide switch 1)

3 second waveguide switches (waveguide switch 2)

4 high pass filters

5 low pass filters

6 fundamental mixer

7 spot-frequency local oscillations

8 intermediate frequency filtering amplifiers

Embodiment

Be illustrated in figure 1 the embodiment of the invention, this device realizing signal analysis instrument spread spectrum function mainly comprises: waveguide adaptor 1, first wave guide switch 2, second waveguide switch 3, high pass filter 4, low pass filter 5, fundamental mixer 6, spot-frequency local oscillation 7 and intermediate frequency filtering amplifier 8, wherein, waveguide adaptor 1 is connected with first wave guide switch 2, first wave guide switch 2 respectively with high pass filter 4, the input of low pass filter 5 connects, high pass filter 4, the output of low pass filter 5 is connected with the second waveguide switch 3 respectively, second waveguide switch 3, fundamental mixer 6 is connected in turn with spot-frequency local oscillation 7, fundamental mixer 6 is connected with intermediate frequency filtering amplifier 8.

This device collocation signal analysis instrument main frame, adopt fundamental wave mixing, the conversion system of spot-frequency local oscillation, reduce conversion loss, utilize the high pass characteristic of waveguide device, and the local oscillator of collaborative planning and low pass filter, it is logical that combination realizes band, realize the suppression to image frequency signal, high local oscillator fundamental signal and switch filter configure according to the mixing up and down of Rational choice, the inhibition zone of the generation region waveguide filter of image signal is overlapping, realize far-end mirror image to suppress, intermediate-freuqncy signal is through amplifier entering signal analytical instrument main frame frequency conversion receiving front-end, utilize the tunable optic filter of main frame front end, filtering image signal, the signal spectral analysis function within the scope of millimeter wave frequency band can be realized, possesses image signal inhibit feature, do not need the correction of host software algorithm and external secondary to calculate and carry out Signal analysis, can significantly improve weak-signal measurement ability.

In a better embodiment, the local frequency scope F of spot-frequency local oscillation 7 lOmeet following requirement:

F LO=2*n*YTO;

Wherein n is the harmonic mixing number of times of spread spectrum module, and YTO is YIG (yttrium iron garnet) oscillator output frequencies.

In a better embodiment, intermediate frequency output area F iF=local frequency scope F lO-input signal frequency range F rF, or intermediate frequency output area F iF=input signal frequency range F rF-local frequency scope F lO.

In a better embodiment, intermediate frequency output area F iFcover in frequency range at signal analysis instrument main frame preselector.

In a better embodiment, this YIG (yttrium iron garnet) oscillator output frequencies 3.1 ~ 9.9GHz, step value is 200MHz.

In a better embodiment, intermediate frequency output area F iF=input signal frequency range FRF-local frequency scope F lO.

In a better embodiment, intermediate frequency output area F iFbetween 4 ~ 26.5GHz.

As shown in Figure 2, the invention also discloses a kind of said apparatus that adopts and the method for spread spectrum is carried out to signal analysis instrument, comprise the steps:

Step one, is connected with signal analysis instrument main frame as follows by spread spectrum device: signal analysis instrument main frame is connected to first wave guide switch 2, second waveguide switch 3, spot-frequency local oscillation 7 and intermediate frequency filtering amplifier 8 in spread spectrum device;

Step 2, to waveguide adaptor input signal, signal enters first wave guide switch through waveguide adaptor;

Step 3, according to the state parameter that signal analysis instrument main frame is arranged, the waveguide switch state in configuration spread spectrum device, makes signal through different filters, is in different working frequency range.For 3mm frequency range 75GHz ~ 110GHz, be divided into four wave band: 75 ~ 80GHz, 80 ~ 92.5GHz, utilize waveguide switch to walk low pass filter path, mirror image inhibition point is 99.2 ~ 115.2GHz; 92.5 ~ 104GHz, 104 ~ 110GHz, utilize waveguide switch to walk high pass filter path, mirror image inhibition point is 68 ~ 84.8GHz, and detailed parameters is in table 1.

Table 15mm, 3mm frequency range spread spectrum device local oscillator and switch control rule algorithm

Unit: GHz

Step 4, synthesizes a road by the signal after low-pass filtering and high-pass filtering after the second waveguide switch, sends into fundamental mixer and spot-frequency local oscillation mixing.Its feature is that local frequency is high, and conversion loss is little, and it is between 4 ~ 26.5GHz that intermediate frequency exports.

Step 5, adopts the conversion loss of intermediate frequency filtering amplifier offset frequency mixer, improves the amplitude entering host signal, improves the signal to noise ratio of measurement with this.

Step 6, intermediate-freuqncy signal is sent into the rf inputs mouth of signal analysis instrument main frame, (because its frequency range is consistent with the working frequency range of high band preselector in main frame) realizes the multiplexing of preselector in main frame, with filtering image signal, and through intermediate frequency amplification filtering resampling process.

In a better embodiment, the local frequency scope F of spot-frequency local oscillation 7 lOmeet following requirement:

F LO=2*n*YTO;

Wherein n is the harmonic mixing number of times of spread spectrum module, and YTO is YIG (yttrium iron garnet) oscillator output frequencies.

In a better embodiment, this YIG (yttrium iron garnet) oscillator output frequencies 3.1 ~ 9.9GHz, step value is 200MHz.

In a better embodiment, intermediate frequency output area F iF=input signal frequency range FRF-local frequency scope F lO.

In a better embodiment, intermediate frequency output area F iFbetween 4 ~ 26.5GHz.

In a better embodiment, according to the IF-FRE scope F of spread spectrum device iFwithin the scope of signal analysis instrument main frame preselector covering frequence, according to fundamental wave mixing computing formula successively collocation point local frequency scope F frequently lOand between filter inhibition zone, comprehensively realize image frequency and suppress and spread spectrum function.

In a better embodiment, according to spread spectrum device input signal frequency range, spot-frequency local oscillation frequency range F lOwith IF-FRE scope F iFconfiguration, synthesize and coordinate and wave band division carried out to spread spectrum device overlay area.

In a better embodiment, low-frequency range utilizes frequency conversion formula: input signal frequency range F rF-local frequency scope F lO, coordinate the high pass characteristic of waveguide device and low pass filter combination to realize image frequency signal and suppress.

In a better embodiment, high band utilizes frequency conversion formula: local frequency scope F lO-input signal frequency range F rF, coordinate high pass filter, realize image frequency signal and suppress.

The embody rule of the solution of the present invention of citing summary below:

In actual applications, adopt three kinds of different spread spectrum apparatus/methods to carry out the contrast test of signal analysis instrument spread spectrum: 1, existing spread spectrum device does not add software signal recognizer; 2, existing spread spectrum device adds common software signal Recognition Algorithm; 3, spread spectrum device and method of the present invention, the application testing design sketch of acquisition respectively as shown in figs 3 a-3 c.As can be seen from the figure, compared to prior art, the present invention can meet the requirement of the high accuracy of spread spectrum, high speed and process small-signal better.

More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all those skilled in the art, all should by the determined protection range of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (9)

1. one kind realizes the device of signal analysis instrument spread spectrum function, it is characterized in that, comprise: waveguide adaptor (1), first wave guide switch (2), second waveguide switch (3), high pass filter (4), low pass filter (5), fundamental mixer (6), spot-frequency local oscillation (7) and intermediate frequency filtering amplifier (8), wherein, described waveguide adaptor (1) is connected with described first wave guide switch (2), described first wave guide switch (2) respectively with described high pass filter (4), the input of low pass filter (5) connects, described high pass filter (4), the output of low pass filter (5) is connected with described second waveguide switch (3) respectively, described second waveguide switch (3), fundamental mixer (6) is connected in turn with spot-frequency local oscillation (7), described fundamental mixer (6) is connected with described intermediate frequency filtering amplifier (8).
2. a kind of device realizing signal analysis instrument spread spectrum function as claimed in claim 1, is characterized in that, the local frequency scope F of described spot-frequency local oscillation (7) lOmeet following requirement: F lO=2*n*YTO, wherein n is the harmonic mixing number of times of spread spectrum module, and YTO is yttrium iron garnet oscillator output frequencies.
3. a kind of device realizing signal analysis instrument spread spectrum function as claimed in claim 2, is characterized in that, intermediate frequency output area F iF=local frequency scope F lO-input signal frequency range F rF, or intermediate frequency output area F iF=input signal frequency range F rF-local frequency scope F lO.
4. a kind of device realizing signal analysis instrument spread spectrum function as claimed in claim 3, is characterized in that, described intermediate frequency output area F iFcover in frequency range at signal analysis instrument main frame preselector.
5. realize a method for signal analysis instrument spread spectrum function, it is characterized in that, comprise the steps:
Step one, is connected with signal analysis instrument main frame as follows by spread spectrum device: signal analysis instrument main frame is connected to first wave guide switch, the second waveguide switch, spot-frequency local oscillation and intermediate frequency filtering amplifier in spread spectrum device;
Step 2, to waveguide adaptor input signal, signal enters first wave guide switch through waveguide adaptor;
Step 3, according to the state parameter that signal analysis instrument main frame is arranged, the waveguide switch state in configuration spread spectrum device, makes signal through different filters, is in different working frequency range;
Step 4, synthesizes a road by the signal after low-pass filtering and high-pass filtering after the second waveguide switch, sends into fundamental mixer and spot-frequency local oscillation mixing;
Step 5, adopts the conversion loss of intermediate frequency filtering amplifier offset frequency mixer, improves the amplitude entering host signal;
Step 6, sends into the rf inputs mouth of signal analysis instrument main frame, realizes the multiplexing of the preselector in main frame, filtering image signal by intermediate-freuqncy signal, and enters main frame frequency conversion reception process path.
6. a kind of method realizing signal analysis instrument spread spectrum function as claimed in claim 5, is characterized in that, according to the IF-FRE scope F of spread spectrum device iFwithin the scope of signal analysis instrument main frame preselector covering frequence, according to fundamental wave mixing computing formula successively collocation point local frequency scope F frequently lOand between filter inhibition zone, comprehensively realize image frequency and suppress and spread spectrum function.
7. a kind of method realizing signal analysis instrument spread spectrum function as claimed in claim 6, is characterized in that, according to spread spectrum device input signal frequency range, spot-frequency local oscillation frequency range F lOwith IF-FRE scope F iFconfiguration, synthesize and coordinate and wave band division carried out to spread spectrum device overlay area.
8. a kind of method realizing signal analysis instrument spread spectrum function as claimed in claim 7, it is characterized in that, low-frequency range utilizes frequency conversion formula: input signal frequency range F rF-local frequency scope F lO, coordinate the high pass characteristic of waveguide device and low pass filter combination to realize image frequency signal and suppress.
9. a kind of method realizing signal analysis instrument spread spectrum function as claimed in claim 7, it is characterized in that, high band utilizes frequency conversion formula: local frequency scope F lO-input signal frequency range F rF, coordinate high pass filter, realize image frequency signal and suppress.
CN201310616148.3A 2013-11-19 2013-11-19 A kind of apparatus and method realizing signal analysis instrument spread spectrum function CN103634024B (en)

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CN106095705B (en) * 2016-05-18 2019-04-30 中国电子科技集团公司第四十一研究所 It is a kind of to realize signal/spectrum analyzer ultra wide band spread spectrum device and method

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US5235503A (en) * 1990-12-10 1993-08-10 Asea Brown Boveri Ltd. Process and device for eliminating or reducing harmonics and/or resonance oscillations
CN101455011A (en) * 2006-05-26 2009-06-10 特克特朗尼克国际销售有限责任公司 Electric power display and signal analyzer of communication signal
CN102183691A (en) * 2011-03-22 2011-09-14 安徽白鹭电子科技有限公司 Double-tuned microwave spectrum analyzer

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US5235503A (en) * 1990-12-10 1993-08-10 Asea Brown Boveri Ltd. Process and device for eliminating or reducing harmonics and/or resonance oscillations
CN101455011A (en) * 2006-05-26 2009-06-10 特克特朗尼克国际销售有限责任公司 Electric power display and signal analyzer of communication signal
CN102183691A (en) * 2011-03-22 2011-09-14 安徽白鹭电子科技有限公司 Double-tuned microwave spectrum analyzer

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