CN110138473A - Spectral leakage detection method in a kind of arrays based on digital power - Google Patents
Spectral leakage detection method in a kind of arrays based on digital power Download PDFInfo
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- CN110138473A CN110138473A CN201910323962.3A CN201910323962A CN110138473A CN 110138473 A CN110138473 A CN 110138473A CN 201910323962 A CN201910323962 A CN 201910323962A CN 110138473 A CN110138473 A CN 110138473A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/354—Adjacent channel leakage power
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses spectral leakage detection methods in a kind of arrays based on digital power, the bottom a reference value the following steps are included: S1, measurement make an uproar: remove Anneta module, using matched load terminations, the noise power P of radio-frequency channel and digital processing part is then calculatedrefn；S2, measurement total noise of centrifuge power: signal transmission is carried out using wireless mode, calculates antenna, radio-frequency channel, numerical portion overall noise power Pn；S3, spectral leakage judgement: by total noise of centrifuge power contrast in the hot-tempered bottom a reference value and step S2 that are measured in step S1, if the difference between total noise of centrifuge power and bottom a reference value of making an uproar is greater than setting threshold value, then think that there are spectral leakages, otherwise it is assumed that there is no spectral leakage or spectral leakage are negligible.This method is suitable for any formation, and adaptability is good, and by comparison judgement, whether there is or not the antenna array digital powers under antenna case, can quickly adjudicate the spectral leakage in arrays, have the advantages of simple structure and easy realization.
Description
Technical field
The present invention relates to array signal processing technology, it is specifically related in a kind of arrays based on digital power
Spectral leakage detection method.
Background technique
The good characteristic of antenna array Anti-Jamming Technique makes it in high-end GNSS (Global Navigation Satellite
System it) is widely applied in receiver.By taking four array elements as an example, the analog portion of antenna array contain the antenna on four tunnels with
Radio-frequency channel, complexity are four times of single antenna receiver, and the requirement to electromagnetic compatibility is greater than individual antenna.If electromagnetism
Compatible index does not reach requirement, it will generates spectral leakage, the frequency spectrum of leakage forms interference, and interference is launched by antenna
It goes, if interference band receives in the bandwidth of antenna, and possibly through antenna itself or other antennas.Therefore, spectral leakage
It will seriously affect the interference free performance of antenna array.
Existing spectral leakage is tested by radiation plane, is incuded by the probe of radiometer to spectral leakage.
On the one hand this method belongs to off-line test, and the detection method of spectral leakage is complicated, and on the other hand, probe is in induction spectral leakage
During can change electromagnetic field inside antenna array, can not really reflect the spectral leakage inside antenna array.Radiometer is direct
Spectral leakage detection difficult is carried out to satellite navigation aerial battle array receiver, it is difficult to promote.Solve asking for spectral leakage detection difficult
Topic helps quickly to position investigation antenna array failure.
Summary of the invention
To solve the above-mentioned problems, the object of the present invention is to provide it is a kind of have the advantages of simple structure and easy realization based on digital function
Spectral leakage detection method in the arrays of rate.
The technical solution adopted by the present invention is that:
Spectral leakage detection method in a kind of arrays based on digital power, comprising the following steps:
S1, it measures bottom a reference value of making an uproar: removing Anneta module, using matched load terminations, then calculate radio-frequency channel
With the noise power P of digital processing partrefn；
S2, measurement total noise of centrifuge power: signal transmission is carried out using wireless mode, calculates antenna, radio-frequency channel, digital section
Divide overall noise power Pn；
S3, spectral leakage judgement: by total noise of centrifuge power contrast in the hot-tempered bottom a reference value and step S2 that are measured in step S1,
If the difference between total noise of centrifuge power and bottom a reference value of making an uproar is greater than setting threshold value, then it is assumed that there are spectral leakages, otherwise recognize
For there is no spectral leakage or spectral leakage are negligible.
Further, hot-tempered bottom a reference value measures P in the step S1refnFormula be
Wherein, n is the sequence number in channel, and 1≤n≤N, N are the element number of array of antenna array, xnIt (i) is channel n in i
The sampled value at quarter, L are the cumulant of power estimation.
Further, total noise of centrifuge power P in the step S2nFormula be
Wherein, n is the sequence number in channel, and 1≤n≤N, N are the element number of array of antenna array, xnIt (i) is channel n in i
The sampled value at quarter.
Further, the contrast equation in the step S3 is
lg(Pn)-lg(Prefn) >=Δ, wherein Δ is decision threshold, Δ=0.5dB.
The beneficial effects of the present invention are: this method is suitable for any formation (linear array, planar array, solid array
Deng), adaptability is good, by comparison judgement whether there is or not the antenna array digital power under antenna case is poor, can quickly adjudicate antenna array
Spectral leakage in band, has the advantages of simple structure and easy realization.
Detailed description of the invention
Fig. 1 is work flow diagram of the invention；
Fig. 2 is the structure chart of aerial array；
Fig. 3 is the influence schematic diagram of spectrum leakage.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
It is as shown in Figure 1 spectral leakage detection method in a kind of arrays based on digital power of the invention, including
Following steps:
S1, measurement directly adopt the noise power that wired matched load terminations carry out signal transmission, including radio frequency
Channel and digital processing part, radio-frequency channel as shown in Figure 2 include that low-noise amplifier, frequency mixer, bandpass filter, intermediate frequency are put
Big device and ADC, that is, make an uproar bottom a reference value Prefn, a reference value measurement PrefnFormula be
Wherein, n is the sequence number in channel, and 1≤n≤N, N are the element number of array of antenna array, xnIt (i) is channel n in i
The sampled value at quarter, because not having antenna element, low noise entrance is matched load, which is receiving channel thermal noise, and L is
Accumulated samples quantity when power is estimated, reduces evaluated error by way of cumulative mean, and wherein H indicates conjugate transposition.
What S2, test used wireless mode progress signal transmission includes the total noise of centrifuge of antenna, radio-frequency channel, numerical portion
Power Pn, i.e. complete machine makes an uproar bottom test value Pn, complete machine makes an uproar bottom test value PnFormula be
Wherein, n is the sequence number in channel, and 1≤n≤N, N are the element number of array of antenna array, xnIt (i) is channel n in i
The sampled value at quarter.
S3, bottom test value that complete machine in the hot-tempered bottom a reference value and step S2 that measure in step S1 is made an uproar comparison, if complete machine is made an uproar
Satisfaction between bottom test value and bottom a reference value of making an uproar: lg (Pn)-lg(Prefn) >=Δ, wherein Δ is decision threshold, is usually taken
0.5dB, then it is assumed that there are spectral leakages, otherwise it is assumed that there is no spectral leakage or spectral leakage are negligible.
This method is suitable for any formation (linear array, planar array, solid array etc.), and adaptability is good, passes through comparison
Whether there is or not the antenna array digital powers under antenna case for judgement, can quickly adjudicate the spectral leakage in arrays, and structure is simple,
It is easily achieved.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (4)
1. spectral leakage detection method in a kind of arrays based on digital power, which comprises the following steps:
S1, it measures bottom a reference value of making an uproar: removing Anneta module, using matched load terminations, then calculate radio-frequency channel sum number
The noise power P of word processing partrefn；
S2, measurement total noise of centrifuge power: signal transmission is carried out using wireless mode, calculating antenna, radio-frequency channel, numerical portion are whole
Bulk noise power Pn；
S3, spectral leakage judgement: by total noise of centrifuge power contrast in the hot-tempered bottom a reference value and step S2 that are measured in step S1, if
Difference between total noise of centrifuge power and bottom a reference value of making an uproar is greater than setting threshold value, then it is assumed that there are spectral leakages, otherwise it is assumed that not
There are spectral leakage or spectral leakage are negligible.
2. spectral leakage detection method in the arrays according to claim 1 based on digital power, it is characterised in that:
Hot-tempered bottom a reference value measures P in the step S1refnFormula be
Wherein, n is the sequence number in channel, and 1≤n≤N, N are the element number of array of antenna array, xnIt (i) is channel n adopting at the i moment
Sample value, L are accumulated samples quantity when power is estimated, H indicates conjugate transposition.
3. spectral leakage detection method in the arrays according to claim 1 based on digital power, it is characterised in that:
Total noise of centrifuge power P in the step S2nFormula be
Wherein, n is the sequence number in channel, and 1≤n≤N, N are the element number of array of antenna array, xnIt (i) is channel n adopting at the i moment
Sample value.
4. spectral leakage detection method in the arrays according to claim 1 based on digital power, it is characterised in that:
Contrast equation in the step S3 is
lg(Pn)-lg(Prefn) >=Δ, wherein Δ is decision threshold, Δ=0.5dB.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417492A (en) * | 2019-08-12 | 2019-11-05 | 太仓市同维电子有限公司 | A kind of detection aerial band is interior to receive spuious method |
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| US7825857B2 (en) * | 2009-02-09 | 2010-11-02 | Bae Systems Information And Electronic Systems Integration Inc. | System, method and apparatus for reducing the effects of low level interference in a communication system |
| CN106970400A (en) * | 2017-03-29 | 2017-07-21 | 中国人民解放军国防科学技术大学 | Antenna array anti-interference processing method under a kind of power enhancing background |
| CN107247274A (en) * | 2017-06-27 | 2017-10-13 | 重庆九洲星熠导航设备有限公司 | A kind of four quick self-adapted methods of array element anti-interference antenna passage |
| CN107748374A (en) * | 2017-10-30 | 2018-03-02 | 中国人民解放军国防科技大学 | Method for optimizing reference array element of GNSS antenna array |
-
2019
- 2019-04-22 CN CN201910323962.3A patent/CN110138473A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7825857B2 (en) * | 2009-02-09 | 2010-11-02 | Bae Systems Information And Electronic Systems Integration Inc. | System, method and apparatus for reducing the effects of low level interference in a communication system |
| CN106970400A (en) * | 2017-03-29 | 2017-07-21 | 中国人民解放军国防科学技术大学 | Antenna array anti-interference processing method under a kind of power enhancing background |
| CN107247274A (en) * | 2017-06-27 | 2017-10-13 | 重庆九洲星熠导航设备有限公司 | A kind of four quick self-adapted methods of array element anti-interference antenna passage |
| CN107748374A (en) * | 2017-10-30 | 2018-03-02 | 中国人民解放军国防科技大学 | Method for optimizing reference array element of GNSS antenna array |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417492A (en) * | 2019-08-12 | 2019-11-05 | 太仓市同维电子有限公司 | A kind of detection aerial band is interior to receive spuious method |
| CN110417492B (en) * | 2019-08-12 | 2021-09-07 | 太仓市同维电子有限公司 | Method for detecting in-band received spurious signals of antenna |
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