CN106571791A - Reconfigurable-technique-based PRF digital filter - Google Patents
Reconfigurable-technique-based PRF digital filter Download PDFInfo
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- CN106571791A CN106571791A CN201610972519.5A CN201610972519A CN106571791A CN 106571791 A CN106571791 A CN 106571791A CN 201610972519 A CN201610972519 A CN 201610972519A CN 106571791 A CN106571791 A CN 106571791A
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- digital
- prf
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- analog
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0294—Variable filters; Programmable filters
Abstract
The invention discloses a reconfigurable-technique-based PRF digital filter comprising an analog-to-digital conversion unit, a pretreatment unit, a denoising unit, and a digital signal filtering unit. The analog-to-digital conversion unit is used for carrying out analog-to-digital conversion on two paths of intermediate-frequency signals to generate corresponding digital signals; the pretreatment unit is used for carrying out demodulation and orthogonal mixing on the two paths of digital signals and carrying out frequency conversion processing to obtain a to-be-processed signal; the denoising unit is used for carrying out pulse noise removing processing on the to-be-processed signal; and the digital signal filtering unit is used for carrying out PRF spectra line suppression processing on the to-be-processed signal after denoising processing, carrying out bandwidth setting based on different PRF values, and outputting a digital signal meeting a processing requirement of an external processor. According to the reconfigurable-technique-based PRF digital filter disclosed by the invention, with utilization of the bandwidth and central frequency of the digital PRF filter, programming setting can be carried out based on the PRF value; and a noise aliasing problem can be solved by out-of-band rejection of the digital PRF filter.
Description
Technical field
The present invention relates to digital signal filter field, more particularly to a kind of PRF digital filterings based on Reconfiguration Technologies
Device.
Background technology
The system of pulse-modulated signal phase noise can be measured at present mainly includes PN9000 and E5505 etc., and these are
The composition of system includes phase-sensitive detector, internal reference source, phase-locked loop, high-speed AD, simulation PRF wave filter and digital processing unit etc..
Because the carrier noise sideband meeting aliasing of pulse-modulated signal enters the noise sideband of each PRF spectral lines, so needing measuring
External simulation PRF wave filter carries out anti-aliasing process in journey.
But the shortcoming of this method is the mid frequency for simulating PRF wave filter fixes, and measurement difference repetition PRF pulses are adjusted
Signal demand processed selects to purchase different simulation PRF wave filter, so the selection for causing PRF wave filter during user's use is received
Limit, seriously restricts test process.In addition the Out-of-band rejection of simulation PRF wave filter is undesirable, cause the signal to noise ratio of whole system compared with
Difference.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind based on reconfigurable PRF digital filters, to solve arteries and veins
PRF wave filter is difficult to the problem of selection in modulated signal phase noise measurement.Specifically,
This programme solve first technical problem be：The mid frequency of simulation PRF wave filter is fixed, the different repetitions of measurement
PRF pulse-modulated signals need to select to purchase different simulation PRF wave filter, so causing PRF filtering during user's use
The selection of device is limited, and seriously restricts test process；
This programme solve second technical problem be：The Out-of-band rejection of simulation PRF wave filter is undesirable, causes whole system
The noise of system is poor；
A kind of PRF digital filters based on Reconfiguration Technologies, the wave filter includes：
AD conversion unit, two-way intermediate-freuqncy signal is carried out respectively analog digital conversion, generates corresponding digital signal；
Pretreatment unit, mixing is demodulated to two ways of digital signals, and carries out frequency-conversion processing, obtains pending signal；
Denoising unit, treating process signal carries out the outer noise removal process of arteries and veins；
Digital signal filter unit, to denoising after pending signal carry out PRF spectral lines suppression process, and according to not
Same PRF values carry out bandwidth setting, and output meets the digital signal of ppu processing requirement.
Preferably, the AD conversion unit includes：
First analog-digital converter, for carrying out analog digital conversion to first via intermediate-freuqncy signal, generates corresponding numeral letter
Number；
Second analog-digital converter, for carrying out analog digital conversion to the second tunnel intermediate-freuqncy signal, generates corresponding numeral letter
Number.
Preferably, the pretreatment unit includes：
I/Q demodulation modules, mixing is demodulated to two ways of digital signals, exports hybrid digital signal；
Digital Down Converter Module, down-converted is carried out to hybrid digital signal, obtains pending signal.
Preferably, the denoising unit includes：Stop window, based on external sync pulse signal, treats process signal and enters
Row removes the outer noise processed of arteries and veins.
Preferably, the denoising unit is further included：Pulse detection module, for controlling down coversion after data circulation
Cross when stopping window, data output is carried out in arteries and veins, data cut-off is carried out outside arteries and veins.
Beneficial effects of the present invention are as follows：
Technical scheme of the present invention solves PRF wave filter in pulse-modulated signal phase noise measurement and is difficult to selection
Problem, specifically：
1st, the bandwidth and mid frequency of numeral PRF wave filter can be programmed setting according to PRF values；
2nd, the Out-of-band rejection of numeral PRF wave filter is preferable, can solve the problems, such as noise aliasing.
Description of the drawings
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings；
Fig. 1 illustrates the schematic diagram of PRF described in this programme (pulse recurrence frequency) digital filter.
Drawing reference numeral
1st, the first analog-digital converter, the 2, second analog-digital converter, 3, I/Q demodulation modules, 4, Digital Down Converter Module, 5, arteries and veins
Rush detecting module, 6, stop window, 7, digital filter, 8, digital processing unit.
Specific embodiment
In order to be illustrated more clearly that the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar part is indicated with identical reference in accompanying drawing.It will be appreciated by those skilled in the art that below institute is concrete
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
Present invention aim at developing a kind of based on reconfigurable PRF digital filters, pulse-modulated signal phase place is solved
PRF wave filter is difficult to the problem of selection in noise measurement.Concrete scheme is as follows：
As shown in figure 1, a kind of be based on reconfigurable PRF digital filters, including：First analog-digital converter 1, the second modulus
Transducer 2, I/Q demodulation modules 3, Digital Down Converter Module 4, pulse detection module 5, the window 6 that stops, digital filter 7, numeral
Processor 8.
The outfan of the first analog-digital converter 1 is connected with the I ends serial bus of I/Q demodulation modules 3, the second analog-digital converter
2 outfan is connected with the Q ends serial bus of I/Q demodulation modules 3, the outfan and Digital Down Converter Module of I/Q demodulation modules 3
4 input serial bus connection, the outfan of Digital Down Converter Module 4 is connected with the input serial bus of the window 6 that stops,
The pulse ends of window 6 of stopping are connected with the outfan serial bus of pulse detection module 5, outfan and the numeral of the window 6 that stops
The input serial bus connection of wave filter 7, the outfan of digital filter 7 can be connected with external digital signal processor.
The outfan of digital filter 7 is connected with the input serial bus of digital processing unit 8 in this programme.
During work, two-way high speed number converter carries out data acquisition to two-way intermediate-freuqncy signal, and data flow respectively enters I/Q solutions
Mode transfer block, demodulates the orthogonal data for obtaining and further lifts sampling precision through Digital Down Convert, and the data flow after down coversion exists
The control of pulse detection module 5 is lower to carry out data output through the window that stops in arteries and veins, data cut-off is carried out outside arteries and veins, by stopping
Only window 6 removes the outer noise of arteries and veins, and with this lift system sensitivity is carried out, through the numeral that the data flow of window 6 of stopping passes through high-order
Wave filter 7 is filtered, and PRF spectral lines are suppressed, because digital filter 7 is programmable, it is possible to according to difference
PRF values arrange carrying out different bandwidth, the data streaming so as to realize the reconfigurability of PRF wave filter, after digital filtering
Entering digital processing unit 8 carries out the calculating process of output power single sideband phase noise.
This programme can be programmed setting using the bandwidth and mid frequency of digital PRF wave filter according to PRF values；Together
When noise aliasing can be solved the problems, such as by the Out-of-band rejection of numeral PRF wave filter.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all of embodiment cannot be exhaustive here, it is every to belong to this
Obvious change that bright technical scheme is extended out changes row still in protection scope of the present invention.
Claims (5)
1. a kind of PRF digital filters based on Reconfiguration Technologies, it is characterised in that the wave filter includes：
AD conversion unit, two-way intermediate-freuqncy signal is carried out respectively analog digital conversion, generates corresponding digital signal；
Pretreatment unit, is demodulated and quadrature hybrid to two ways of digital signals, and carries out frequency-conversion processing, obtains pending letter
Number；
Denoising unit, treating process signal carries out the outer noise removal process of arteries and veins；
Digital signal filter unit, to denoising after pending signal carry out PRF spectral lines suppression process, and according to different
PRF values carry out bandwidth setting, and output meets the digital signal of ppu processing requirement.
2. PRF digital filters according to claim 1, it is characterised in that the AD conversion unit includes：
First analog-digital converter, for carrying out analog digital conversion to first via intermediate-freuqncy signal, generates corresponding digital signal；
Second analog-digital converter, for carrying out analog digital conversion to the second tunnel intermediate-freuqncy signal, generates corresponding digital signal.
3. PRF digital filters according to claim 1, it is characterised in that the pretreatment unit includes：
I/Q demodulation modules, are demodulated and quadrature hybrid to two ways of digital signals, export hybrid digital signal；
Digital Down Converter Module, down-converted is carried out to hybrid digital signal, obtains pending signal.
4. PRF digital filters according to claim 1, it is characterised in that the denoising unit includes：Stop window,
Based on external sync pulse signal, treat process signal and be removed the outer noise processed of arteries and veins.
5. PRF digital filters according to claim 1, it is characterised in that the denoising unit is further included：Pulse
Detecting module, for controlling down coversion after data flow by stop window when, data output is carried out in arteries and veins, carry out outside arteries and veins
Data are ended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610972519.5A CN106571791A (en) | 2016-11-07 | 2016-11-07 | Reconfigurable-technique-based PRF digital filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610972519.5A CN106571791A (en) | 2016-11-07 | 2016-11-07 | Reconfigurable-technique-based PRF digital filter |
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| Publication Number | Publication Date |
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| CN106571791A true CN106571791A (en) | 2017-04-19 |
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| CN201610972519.5A Pending CN106571791A (en) | 2016-11-07 | 2016-11-07 | Reconfigurable-technique-based PRF digital filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132392A (en) * | 2017-12-26 | 2018-06-08 | 北京无线电计量测试研究所 | A kind of millimeter wave digitized pulse modulating signal phase noise-measuring system and method |
| CN114217148A (en) * | 2021-12-06 | 2022-03-22 | 上海精密计量测试研究所 | Pulse modulation wave phase noise calibration device and method based on PRF spectral line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013205093A (en) * | 2012-03-27 | 2013-10-07 | Mitsubishi Electric Corp | Digital phase detector |
| CN104062514A (en) * | 2014-07-02 | 2014-09-24 | 中国电子科技集团公司第四十一研究所 | Device and method for measuring pulse carrier phase noise |
-
2016
- 2016-11-07 CN CN201610972519.5A patent/CN106571791A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013205093A (en) * | 2012-03-27 | 2013-10-07 | Mitsubishi Electric Corp | Digital phase detector |
| CN104062514A (en) * | 2014-07-02 | 2014-09-24 | 中国电子科技集团公司第四十一研究所 | Device and method for measuring pulse carrier phase noise |
Non-Patent Citations (1)
| Title |
|---|
| KAY GHEEN: "Pulsed Phase Noise Measurements", 《HTTPS://CDN.ROHDE-SCHWARZ.COM/PWS/DL_DOWNLOADS/DL_APPLICATION/APPLICATION_NOTES/1EF94___/1EF94_1E_PULSED_PHASE_NOISE_MEAS.PDF》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132392A (en) * | 2017-12-26 | 2018-06-08 | 北京无线电计量测试研究所 | A kind of millimeter wave digitized pulse modulating signal phase noise-measuring system and method |
| CN114217148A (en) * | 2021-12-06 | 2022-03-22 | 上海精密计量测试研究所 | Pulse modulation wave phase noise calibration device and method based on PRF spectral line |
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