CN114217148A - Pulse modulation wave phase noise calibration device and method based on PRF spectral line - Google Patents
Pulse modulation wave phase noise calibration device and method based on PRF spectral line Download PDFInfo
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- CN114217148A CN114217148A CN202111475502.6A CN202111475502A CN114217148A CN 114217148 A CN114217148 A CN 114217148A CN 202111475502 A CN202111475502 A CN 202111475502A CN 114217148 A CN114217148 A CN 114217148A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/26—Measuring noise figure; Measuring signal-to-noise ratio
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention relates to a pulse modulation wave phase noise calibration device and method based on PRF spectral line, the device includes the pulse modulation wave source, the calibration uses the reference source of the continuous wave, phase detector, PRF filter and spectrum analyzer; the output end of the pulse modulation wave source is connected with the LO end of the phase detector; the continuous wave reference source for calibration is connected with the RF end of the phase detector; the IF end of the phase detector is connected with the input end of the PRF filter; the output end of the PRF filter is connected with the input end of the spectrum analyzer. The invention is very suitable for a pulse modulation wave phase noise measurement system through calibration of PRF spectral lines; other measuring devices are not needed, and the whole device is simple in structure.
Description
Technical Field
The invention relates to a short-term frequency stability measuring technology in the field of radio time frequency, in particular to a pulse modulation wave phase noise calibration device and method based on a PRF spectral line.
Background
At present, a phase noise measurement system is calibrated in a microwave millimeter wave frequency range, an absolute phase noise standard device is used, the absolute phase noise standard device comprises a low-phase noise carrier source, a broadband noise source, a modulator, an attenuator, a filter and the like, the absolute phase noise standard device with the structure is not suitable for the calibration requirement of the pulse modulation wave source phase noise measurement system, and the main defects are as follows: 1. essentially, the low phase noise carrier source is still the calibration of the continuous wave phase noise measurement system after being modulated by the broadband noise source; 2. the significant difference between continuous wave phase noise measurement and pulse modulation wave phase noise measurement is that the noise within one-half of the range of the repetition frequency is seriously mixed, and the consequence of modulating the pulse modulation wave source by adopting a broadband noise source is that the noise within one-half of the range of the repetition frequency is seriously mixed, so that the phase noise sideband with serious mixing cannot be accurately calibrated. Due to the above disadvantages of the absolute phase noise standard device, the traceability of the pulse modulation wave phase noise measurement system has not been solved.
Disclosure of Invention
The invention aims to provide a pulse modulation wave phase noise calibration device and method based on a PRF spectral line, and solve the problem of source tracing of a pulse modulation wave phase noise measurement system.
In order to achieve the above object, the present invention provides a PRF spectral line-based pulse modulated wave phase noise calibration apparatus, which includes a pulse modulated wave source, a continuous wave reference source for calibration, a phase detector, a PRF filter, and a spectrum analyzer; the output end of the pulse modulation wave source is connected with the LO end of the phase detector; the continuous wave reference source for calibration is connected with the RF end of the phase detector; the IF end of the phase detector is connected with the input end of the PRF filter; the output end of the PRF filter is connected with the input end of the spectrum analyzer.
In the above PRF spectral line-based pulse modulated wave phase noise calibration apparatus, the phase detector is a standard component.
The invention provides another technical scheme which is a pulse modulation wave phase noise calibration method based on PRF spectral line, comprising:
1) the output frequency of the pulse modulation wave source is f0Pulse modulation wave signals with pulse modulation repetition frequency PRF are sent to a phase detector;
2) the output frequency of the continuous wave reference source is (f)0+fb) The continuous wave reference signal to a phase detector;
3) pulse modulation wave signalThe sum continuous wave reference signal passes through a phase detector to obtain a difference frequency signal fb；
4) Difference frequency signal fbInputting the signal to a spectrum analyzer after the signal passes through a PRF filter;
5) PRF filtered difference frequency signal f by spectrum analyzerbThe spectral line amplitude at PRF of (a) is measured to obtain a 1; PRF filtered difference frequency signal f by spectrum analyzerbIs measured to obtain a 0; calculating the relative difference of phase noise £PRF，￡PRFA1-A0, namely the phase noise difference of the pulse modulation wave source at PRF is obtained by scalingPRF；
6) The output frequency of the pulse modulation wave source is f0The pulse modulation wave signal with the pulse modulation repetition frequency of PRF is transmitted to a pulse modulation wave phase noise measurement system to be measured, and the measurement result of the pulse modulation wave phase noise measurement system to be measured at the PRF position is £1The tracing result of the pulse modulation wave phase noise measurement system to be measured is £1-￡PRF。
According to the pulse modulation wave phase noise calibration method based on the PRF spectral line, the phase detector is a standard component.
The pulse modulation wave phase noise calibration method based on the PRF spectral line is characterized in that the frequency fbIs arranged in the range of 1MHz to 10MHz, and the frequency range of the phase detector covers f0+fb。
The pulse modulation wave phase noise calibration method based on the PRF spectral line is characterized in that the difference frequency signal fbThe pulse modulated wave signal is a frequency-converted pulse modulated wave signal and has the main characteristics of the pulse modulated wave signal.
Compared with the prior art, the invention has the beneficial technical effects that:
the pulse modulation wave phase noise calibration device and method based on the PRF spectral line are very suitable for a pulse modulation wave phase noise measurement system through calibration of the PRF spectral line; other measuring devices are not needed, and the whole device is simple in structure.
Drawings
The device and method for calibrating phase noise of pulse modulated wave based on PRF spectral line of the present invention are given in the following embodiments and accompanying drawings.
Fig. 1 is a schematic diagram of a pulse modulation wave phase noise scaling apparatus based on PRF spectral line according to an embodiment of the present invention.
Detailed Description
The PRF spectral line based pulse modulated wave phase noise scaling apparatus and method of the present invention will be described in further detail with reference to fig. 1.
The absolute phase noise standard device is only suitable for calibration of a continuous wave phase noise measurement system and cannot be suitable for phase noise measurement in a pulse modulation state, so the invention provides the pulse modulation wave phase noise calibration device and method based on the PRF spectral line.
Fig. 1 is a schematic diagram of a PRF spectral line-based pulse modulated wave phase noise scaling apparatus according to an embodiment of the present invention.
Referring to fig. 1, the PRF spectral line-based pulse modulated wave phase noise calibration apparatus of the present embodiment includes a pulse modulated wave source 1, a continuous wave reference source 2 for calibration, a phase detector 3, a PRF filter 4, and a spectrum analyzer 5;
the output end of the pulse modulation wave source 1 is connected with an LO end radio frequency cable of the phase detector 3;
the continuous wave reference source 2 for calibration is connected with a radio frequency cable at the RF end of the phase detector 3;
the IF end of the phase detector 3 is connected with the input end radio frequency cable of the PRF filter 4;
the output end of the PRF filter 4 is connected with the input end radio frequency cable of the spectrum analyzer 5.
Preferably, in this embodiment, the phase detector 3 may be a phase detector in a standard pwm wave phase noise measurement system, that is, the phase detector 3 is a standard component.
The PRF spectral line-based pulse modulation wave phase noise scaling method of the present embodiment includes:
1) the output frequency of the pulse modulation wave source 1 is f0With pulse modulation repetition frequency PRFThe pulse modulation wave signal is sent to a phase detector 3;
2) the output frequency of the continuous wave reference source is (f)0+fb) To the phase detector 3;
frequency fbCan be set in the range of 1MHz to 10MHz, and the frequency range of the phase detector 3 covers f0+fb；
3) The pulse modulation signal and the continuous wave reference signal pass through a phase detector 3 to obtain a difference frequency signal fb；
Difference frequency signal fbThe pulse modulation wave signal after frequency conversion has the main characteristics of the pulse modulation wave signal;
4) difference frequency signal fbAfter passing through a PRF filter 4, the signal is input to a spectrum analyzer 5;
5) the spectrum analyzer 5 filters the PRF filtered difference frequency signal fbThe spectral line amplitude at PRF of (a) is measured to obtain a 1; the spectrum analyzer 5 filters the PRF filtered difference frequency signal fbIs measured to obtain a 0; calculating the relative difference of phase noise £PRF，￡PRFA1-A0, namely the phase noise difference of the pulse modulation wave source 1 at PRF is obtained by scalingPRF；
6) Calibrating a pulse modulation wave phase noise measurement system 6 to be measured by using a pulse modulation wave source 1;
the output frequency of the pulse modulation wave source 1 is f0A pulse modulation wave signal with the pulse modulation repetition frequency of PRF is transmitted to a pulse modulation wave phase noise measurement system 6 to be measured, and the measurement result of the pulse modulation wave phase noise measurement system 6 to be measured at the PRF is £1The tracing result of the pulse modulation wave phase noise measurement system 6 to be measured is £1-￡PRF。
Claims (6)
1. The pulse modulation wave phase noise calibration device based on the PRF spectral line is characterized by comprising a pulse modulation wave source, a continuous wave reference source for calibration, a phase detector, a PRF filter and a spectrum analyzer;
the output end of the pulse modulation wave source is connected with the LO end of the phase detector;
the continuous wave reference source for calibration is connected with the RF end of the phase detector;
the IF end of the phase detector is connected with the input end of the PRF filter;
the output end of the PRF filter is connected with the input end of the spectrum analyzer.
2. The PRF line-based phase noise calibration device for pulse modulated waves according to claim 1, wherein the phase detector is a standard component.
3. The pulse modulation wave phase noise calibration method based on the PRF spectral line is characterized by comprising the following steps:
1) the output frequency of the pulse modulation wave source is f0Pulse modulation wave signals with pulse modulation repetition frequency PRF are sent to a phase detector;
2) the output frequency of the continuous wave reference source is (f)0+fb) The continuous wave reference signal to a phase detector;
3) the pulse modulation signal and the continuous wave reference signal pass through a phase detector to obtain a difference frequency signal fb；
4) Difference frequency signal fbInputting the signal to a spectrum analyzer after the signal passes through a PRF filter;
5) PRF filtered difference frequency signal f by spectrum analyzerbThe spectral line amplitude at PRF of (a) is measured to obtain a 1; PRF filtered difference frequency signal f by spectrum analyzerbIs measured to obtain a 0; calculating the relative difference of phase noise £PRF，￡PRFA1-A0, namely the phase noise difference of the pulse modulation wave source at PRF is obtained by scalingPRF；
6) The output frequency of the pulse modulation wave source is f0The pulse modulation wave signal with the pulse modulation repetition frequency of PRF is transmitted to a pulse modulation wave phase noise measurement system to be measured, and the measurement result of the pulse modulation wave phase noise measurement system to be measured at the PRF position is £1The tracing result of the pulse modulation wave phase noise measurement system to be measured is £1-￡PRF。
4. The PRF line based phase noise calibration method for pulse modulated waves according to claim 3, wherein the phase detector is a standard.
5. The method of PRF line based phase noise scaling of pulse modulated waves according to claim 3, wherein the frequency f isbIs arranged in the range of 1MHz to 10MHz, and the frequency range of the phase detector covers f0+fb。
6. A method for PRF line based phase noise scaling of a pulse modulated wave according to claim 3, characterized in that the difference signal fbThe pulse modulated wave signal is a frequency-converted pulse modulated wave signal and has the main characteristics of the pulse modulated wave signal.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030031241A1 (en) * | 2001-08-01 | 2003-02-13 | Mar Wing Jong | Phase-noise measurement with compensation for phase noise contributed by spectrum analyzer |
| CN202383277U (en) * | 2011-10-28 | 2012-08-15 | 北京无线电计量测试研究所 | Scaling device used for phase noise of phase noise measuring device under pulse state |
| 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 |
| CN106571791A (en) * | 2016-11-07 | 2017-04-19 | 北京无线电计量测试研究所 | Reconfigurable-technique-based PRF digital filter |
-
2021
- 2021-12-06 CN CN202111475502.6A patent/CN114217148A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030031241A1 (en) * | 2001-08-01 | 2003-02-13 | Mar Wing Jong | Phase-noise measurement with compensation for phase noise contributed by spectrum analyzer |
| CN202383277U (en) * | 2011-10-28 | 2012-08-15 | 北京无线电计量测试研究所 | Scaling device used for phase noise of phase noise measuring device under pulse state |
| 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 |
| CN106571791A (en) * | 2016-11-07 | 2017-04-19 | 北京无线电计量测试研究所 | Reconfigurable-technique-based PRF digital filter |
Non-Patent Citations (3)
| Title |
|---|
| 刘鹏飞等: "脉冲调制信号相位噪声的测试方法", 《国外电子测量技术》, vol. 36, no. 5, 31 May 2017 (2017-05-31), pages 7 - 11 * |
| 阎栋梁: "脉冲调制波相位噪声现场测量装置", 《宇航计测技术》, vol. 28, no. 3, 30 June 2008 (2008-06-30), pages 20 - 25 * |
| 鲁赟等: "相位噪声测量方法与实验分析", 《上海电机学院学报》, vol. 14, no. 6, 31 December 2011 (2011-12-31), pages 417 - 421 * |
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