CN103792510A - Radio direction finding system and radio direction finding method - Google Patents
Radio direction finding system and radio direction finding method Download PDFInfo
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- CN103792510A CN103792510A CN201410070583.5A CN201410070583A CN103792510A CN 103792510 A CN103792510 A CN 103792510A CN 201410070583 A CN201410070583 A CN 201410070583A CN 103792510 A CN103792510 A CN 103792510A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
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Abstract
The invention provides a radio direction finding system and a radio direction finding method. According to the radio direction finding system and the radio direction finding method, based on the framework of a double-base wire antenna, the distances between antennae which are adjacent in a certain direction are set to be larger than or equal to 0.5 time of the wave length, and the distance difference is set to be smaller than 0.5 times of the wave length; corresponding intermediate-frequency signals are generated after a double-channel homologous receiver module conducts frequency selection, filtering, amplification and down-conversion on received radio-frequency signals, and then the intermediate-frequency signals are sent to a direction finding plate to be processed; finally, differential processing is conducted on a double-base wire for direction finding. According to the radio direction finding system and the radio direction finding method, the difference method is adopted to eliminate phase ambiguity, the method is easy to realize, the realizing speed is high, and the number of occupied resources is small; due to the adoption of an orthogonal phase discriminator, errors caused by the change of the amplitudes of the received signal can be eliminated, antenna phase discrimination results are more accurate, and a measurement angle can be obtained more accurately.
Description
Technical field
The present invention relates to a kind of radio direction-finding system and direction-finding method thereof, particularly relate to a kind of radio direction-finding system and direction-finding method that antenna distance is not less than 0.5 times of wavelength that be applicable to.
Background technology
Existing single base line interference instrument direction-finding system can only solve the situation that antenna distance is less than 0.5 times of wavelength, along with frequency of operation constantly increases, wavelength is shorter and shorter, and antenna distance is difficult to accomplish to be less than 0.5 times of wavelength, and antenna distance often can not meet phase place without hazy condition.Traditional radio direction-finding system many baselines ratioing technigues that adopt in Project Realization are eliminated phase ambiguity more, and this implementation not only operand is large, and precision is lower.
Traditional interferometer direction finding system hardware forms as shown in Figure 1.Its major defect comes from framework and the direction finding plate unit of antenna element.
Antenna frame is take the antenna of east-west direction as example, and traditional three baseline direction findings as shown in Figure 2.A in figure, B, C, D is four antennas.Adopting ratioing technigue to eliminate phase ambiguity, is to equate this principle by the ratio of adjacent antenna spacing with phase differential ratio, and constantly three final integer values are found in search, and phase differential between antenna is equated with respective antenna spacing ratio respectively.Many baselines ratioing technigue solution phase ambiguity need to be mated phase place, very consuming time, takies great amount of hardware resources.
Direction finding plate module based on traditional three baseline ratioing technigues as shown in Figure 3, A in figure, B, C, D, for through down coversion Si road signal, passes through phase demodulation, separate phase ambiguity and obtain the true phase differential between antenna receiving signal, then obtain accurate direction finding angle by phase differential.Tradition phase demodulation module as shown in Figure 4.
Through type (2) is finally obtained A, the phase differential of two antenna receiving signals of B
owing to containing A in formula (2), the amplitude information of B two paths of signals, therefore
value is easy to be subject to the impact of signal changes in amplitude, makes end product error larger.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of radio direction-finding system and direction-finding method thereof of saving a large amount of operands.
The technical solution used in the present invention is as follows: a kind of radio direction-finding system, comprise that connected successively antenna frame, electronic switch, binary channels are with source receiver and direction finding plate, it is characterized in that: described antenna frame is double-basis wire antenna framework, and the difference of the distance in direction between adjacent antenna is less than 0.5 times of wavelength.
As preferably, the distance in described direction between adjacent antenna is more than or equal to 0.5 times of wavelength.
As preferably, described direction finding plate comprises the orthogonal phase demodulation module that is connected successively, separates phase ambiguity module and ask Corner Block List Representation.
Based on the direction-finding method of above-mentioned direction-finding system, concrete grammar step is: step 1, based on double-basis wire antenna framework, and the setting party upwards distance between adjacent antenna is more than or equal to 0.5 times of wavelength, and the difference of distance is less than 0.5 times of wavelength; Step 2, binary channels homology receiver module antenna reception to radiofrequency signal carry out respectively producing corresponding intermediate-freuqncy signal after frequency-selecting, filtering, amplification and down-converted, give direction finding plate and carry out signal processing; Step 3, double-basis line is carried out to difference processing direction finding.
As preferably, the concrete grammar of described step 3 is, the antenna intermediate-freuqncy signal after down coversion, and by homophase and orthogonal multiplying each other after phase demodulation, then it is fuzzy to carry out Difference Solution, finally obtains measured angular.
As preferably, by homophase and the orthogonal phase demodulation that multiplies each other, then it is fuzzy to remove after high fdrequency component, then carry out after filtration Difference Solution.
As preferably, adopt low-pass filtering filtering high fdrequency component.
Compared with prior art, the invention has the beneficial effects as follows: adopt method of difference solution phase ambiguity, realize ingeniously, saved a large amount of computings.Adopt quadrature phase detector to receive signal and differ, eliminated the impact of signal amplitude, make measurement of angle result more accurate.
Accompanying drawing explanation
Fig. 1 is conventional interference instrument direction-finding system principle schematic.
Fig. 2 is traditional three line concentration direction finding principle schematic.
Fig. 3 is that traditional three baseline ratioing technigues are asked angle principle schematic.
Fig. 4 is traditional phase detector principle schematic.
Fig. 5 is the wherein direction-finding system theory diagram of an embodiment of the present invention.
Fig. 6 is method of difference direction-finder antenna principle schematic embodiment illustrated in fig. 5.
Fig. 7 is phase of received signal figure embodiment illustrated in fig. 5.
Fig. 8 is receiver radio frequency module single channel schematic diagram embodiment illustrated in fig. 5.
Fig. 9 is the direction-finding signal disposable plates schematic block diagram of double-basis line method of difference embodiment illustrated in fig. 5.
Figure 10 is quadrature phase detector principle schematic.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
As shown in Figure 5, a kind of radio direction-finding system, comprise that connected successively antenna frame, electronic switch, binary channels are with source receiver and direction finding plate, described antenna frame is double-basis wire antenna framework, and the difference of the distance in direction between (East and West direction or north-south) adjacent antenna is less than 0.5 times of wavelength.
As shown in Figure 6, antenna frame is take east-west direction antenna as example.D
1, d
2for the distance between adjacent antenna, θ is measured angular.Can obtain according to the triangle cosine law:
d
1cosθ=AA′ (3)
d
2cosθ=OB′ (4)
Can regard as while being similar to infinity when incoming wave signal, according to Electromagnetic Wave Propagation rule, the signal phase of O point and A ' is identical, and in like manner the signal phase of B point and B ' is identical.
Distance in described direction between adjacent antenna is more than or equal to 0.5 times of wavelength.
Due to d
1, d
2all be not less than λ/2, so there is respectively phase ambiguity n
1and n
2.
Wherein,
for the phase differential of position A point and position O point signal incoming wave,
for the phase differential of position O point and position B point signal incoming wave, λ is incoming wave signal wavelength.Can be obtained by above formula:
If make d
1-d
2< λ/2, n
1-n
2=0, therefore successfully eliminate phase ambiguity.Formula (7) can be reduced to:
Wherein Δ d=d
1-d
2, Δ d and λ are known, only need to obtain
with
in substitution formula, can try to achieve θ.
Antenna frame is designed to AO by above analysis and OB is less than λ/2 apart from differing, and in like manner CO and OD distance differ and be also less than λ/2, and position as shown in Figure 5.
Described direction finding plate comprises orthogonal phase demodulation module, the solution phase ambiguity module being connected successively and asks Corner Block List Representation.
Based on the direction-finding method of above-mentioned direction-finding system, concrete grammar step is: step 1, based on double-basis wire antenna framework, and the setting party upwards distance between adjacent antenna is more than or equal to 0.5 times of wavelength, and the difference of distance is less than 0.5 times of wavelength; Step 2, as shown in Figure 8, binary channels homology receiver module antenna reception to radiofrequency signal carry out respectively producing corresponding intermediate-freuqncy signal after frequency-selecting, filtering, amplification and down-converted, give direction finding plate and carry out signal processing; Step 3, double-basis line is carried out to difference processing direction finding.
As shown in Figure 9, the concrete grammar of described step 3 is, the antenna intermediate-freuqncy signal after down coversion, and by orthogonal phase demodulation, after homophase and orthogonal multiplying each other, then it is fuzzy to carry out Difference Solution, finally obtains measured angular.In this specific embodiment, A, O, B is process down coversion Hou tri-tunnel intermediate-freuqncy signals.By novel orthogonal phase demodulation module, Difference Solution obfuscation module, finally obtain measured angular.
As shown in figure 10, wherein, V
afor the signal expression that aerial position A receives, V
othe signal expression of receiving for aerial position O,
with
the current phase place that is respectively position A point and position O point signal, A and B are respectively the range value of position A point and position O point signal, the angular frequency that ω is signal.
By homophase and the orthogonal phase demodulation that multiplies each other, more after filtration except after high fdrequency component, finally carry out Difference Solution fuzzy.
In this specific embodiment, adopt low-pass filtering filtering high fdrequency component.
Two paths of signals completes respectively after homophase, orthogonal multiplying each other at quadrature phase detector, then obtains after low-pass filter filtering high fdrequency component:
After being divided by, formula (9) and formula (10) obtain:
Can be found out by formula (11), adopt the quadrature phase detector can erasure signal amplitude A, the impact of B, makes measurement result more accurate.
In like manner, can measure North and South direction C, O, the direction finding angle of D antenna, comprehensive east-west direction obtains in the horizontal direction the angle with vertical direction, finally realizes direction finding.
Adopt method of difference to eliminate phase ambiguity, realize simply, not only realize speed fast, and it is less to take resource; The quadrature phase detector adopting can be offset owing to receiving signal amplitude and be changed the error of bringing, and makes antenna identified result more accurate, thereby can obtain more accurately measured angular.
Claims (7)
1. a radio direction-finding system, comprise that connected successively antenna frame, electronic switch, binary channels are with source receiver and direction finding plate, it is characterized in that: described antenna frame is double-basis wire antenna framework, and the difference of the distance in direction between adjacent antenna is less than 0.5 times of wavelength.
2. system according to claim 1, is characterized in that: the distance in described direction between adjacent antenna is more than or equal to 0.5 times of wavelength.
3. direction finding plate comprises orthogonal phase demodulation module, the solution phase ambiguity module being connected successively and asks Corner Block List Representation according to claim 2.
4. the direction-finding method based on direction-finding system described in claim 3, concrete grammar step is: step 1, based on double-basis wire antenna framework, the setting party upwards distance between adjacent antenna is more than or equal to 0.5 times of wavelength, and the difference of distance is less than 0.5 times of wavelength; Step 2, binary channels homology receiver module antenna reception to radiofrequency signal carry out respectively producing corresponding intermediate-freuqncy signal after frequency-selecting, filtering, amplification and down-converted, give direction finding plate and carry out signal processing; Step 3, double-basis line is carried out to difference processing direction finding.
5. direction-finding method according to claim 4, the concrete grammar of described step 3 is, the antenna intermediate-freuqncy signal after down coversion, by homophase and orthogonal multiplying each other after phase demodulation, then it is fuzzy to carry out Difference Solution, finally obtains measured angular.
6. direction-finding method according to claim 5, by homophase and the orthogonal phase demodulation that multiplies each other, then it is fuzzy to remove after high fdrequency component, then carry out after filtration Difference Solution.
7. direction-finding method according to claim 6, adopts low-pass filtering filtering high fdrequency component.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459611A (en) * | 2014-12-10 | 2015-03-25 | 成都中星世通电子科技有限公司 | Reinforced antenna type radio direction finding device |
| CN104459610A (en) * | 2014-12-10 | 2015-03-25 | 成都中星世通电子科技有限公司 | Radio direction finding device |
| CN104483656A (en) * | 2014-12-10 | 2015-04-01 | 成都中星世通电子科技有限公司 | Easily-operated radio direction finding equipment |
| CN107219496A (en) * | 2017-06-16 | 2017-09-29 | 中国电子科技集团公司第二十八研究所 | A kind of improved correlation interferometer phase detecting method |
| CN111060866A (en) * | 2020-03-16 | 2020-04-24 | 南京万自联电子科技有限公司 | Double-channel wireless communication direction-finding system and direction-finding method thereof |
| CN111273217A (en) * | 2020-03-03 | 2020-06-12 | 青岛大学 | A Distributed Radio Direction Finding and Positioning System |
| CN111538058A (en) * | 2020-04-23 | 2020-08-14 | 桂林长海发展有限责任公司 | Passive positioning method, device and storage medium |
| CN115902768A (en) * | 2021-08-10 | 2023-04-04 | 大唐移动通信设备有限公司 | Positioning method, device and storage medium of terminal equipment |
| CN116819431A (en) * | 2023-08-31 | 2023-09-29 | 杭州岸达科技有限公司 | Phase interferometer direction finding method based on anomalous phase mode excitation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352599Y (en) * | 2008-12-17 | 2009-11-25 | 成都华日通讯技术有限公司 | Double-passage correlation interferometer direction-finder antenna with five antenna elements |
| CN101963659A (en) * | 2010-10-25 | 2011-02-02 | 哈尔滨工程大学 | Method for realizing wideband direction finding by utilizing three-dimension orthogonal interferometer |
| CN103091660A (en) * | 2012-09-24 | 2013-05-08 | 郁涛 | Virtual base line direction-finding method based on phase jump correction |
-
2014
- 2014-02-28 CN CN201410070583.5A patent/CN103792510A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352599Y (en) * | 2008-12-17 | 2009-11-25 | 成都华日通讯技术有限公司 | Double-passage correlation interferometer direction-finder antenna with five antenna elements |
| CN101963659A (en) * | 2010-10-25 | 2011-02-02 | 哈尔滨工程大学 | Method for realizing wideband direction finding by utilizing three-dimension orthogonal interferometer |
| CN103091660A (en) * | 2012-09-24 | 2013-05-08 | 郁涛 | Virtual base line direction-finding method based on phase jump correction |
Non-Patent Citations (2)
| Title |
|---|
| 冯清澄: "正交鉴相电路及其鉴相精度分析", 《电讯技术》 * |
| 崔旭: "基于虚拟基线的干涉仪测向改进方法", 《通信技术》, vol. 44, no. 7, 31 July 2011 (2011-07-31), pages 2 - 3 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459611A (en) * | 2014-12-10 | 2015-03-25 | 成都中星世通电子科技有限公司 | Reinforced antenna type radio direction finding device |
| CN104459610A (en) * | 2014-12-10 | 2015-03-25 | 成都中星世通电子科技有限公司 | Radio direction finding device |
| CN104483656A (en) * | 2014-12-10 | 2015-04-01 | 成都中星世通电子科技有限公司 | Easily-operated radio direction finding equipment |
| CN107219496A (en) * | 2017-06-16 | 2017-09-29 | 中国电子科技集团公司第二十八研究所 | A kind of improved correlation interferometer phase detecting method |
| CN107219496B (en) * | 2017-06-16 | 2019-06-11 | 中国电子科技集团公司第二十八研究所 | A kind of improved correlation interferometer phase detecting method |
| CN111273217A (en) * | 2020-03-03 | 2020-06-12 | 青岛大学 | A Distributed Radio Direction Finding and Positioning System |
| CN111273217B (en) * | 2020-03-03 | 2023-05-30 | 青岛大学 | A Distributed Radio Direction Finding and Positioning System |
| CN111060866A (en) * | 2020-03-16 | 2020-04-24 | 南京万自联电子科技有限公司 | Double-channel wireless communication direction-finding system and direction-finding method thereof |
| CN111060866B (en) * | 2020-03-16 | 2020-07-07 | 南京万自联电子科技有限公司 | Double-channel wireless communication direction-finding system and direction-finding method thereof |
| CN111538058A (en) * | 2020-04-23 | 2020-08-14 | 桂林长海发展有限责任公司 | Passive positioning method, device and storage medium |
| CN115902768A (en) * | 2021-08-10 | 2023-04-04 | 大唐移动通信设备有限公司 | Positioning method, device and storage medium of terminal equipment |
| CN116819431A (en) * | 2023-08-31 | 2023-09-29 | 杭州岸达科技有限公司 | Phase interferometer direction finding method based on anomalous phase mode excitation |
| CN116819431B (en) * | 2023-08-31 | 2023-12-08 | 杭州岸达科技有限公司 | Phase interferometer direction finding method based on anomalous phase mode excitation |
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