CN202939310U - GPS-interference resistant test system - Google Patents
GPS-interference resistant test system Download PDFInfo
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- CN202939310U CN202939310U CN 201220679983 CN201220679983U CN202939310U CN 202939310 U CN202939310 U CN 202939310U CN 201220679983 CN201220679983 CN 201220679983 CN 201220679983 U CN201220679983 U CN 201220679983U CN 202939310 U CN202939310 U CN 202939310U
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Abstract
A GPS-interference resistant test system relates to a GPS-interference resistant system and aims at solving a low test-precision problem of GPS-interference resistant tests at present. A first antenna of the system is used for receiving interference signals output by a first jammer, a second antenna of the system is used for receiving interference signals output by a second jammer and a third antenna of the system is used for receiving interference signals output by a third jammer. An end of a self-adaptive nulling antenna is connected with a first input terminal of a spectrum analyzer. An end of the first antenna is connected with a second input terminal of the spectrum analyzer. The self-adaptive nulling antenna is arranged in a center of a test area. The second antenna and the third antenna are mounted on one side of the self-adaptive nulling antenna and are respectively taken to be a low elevation-angle interference device. The first antenna is mounted in the test area and is taken to be an interference test device. The GPS-interference resistant test system provided by the utility model is suitable for the GPS-interference resistant test.
Description
Technical field
The utility model relates to a kind of anti-GPS EVAC (Evacuation Network Computer Model).
Background technology
At present, in anti-GPS disturbed test, no matter disturb under environment or three interference environments going alone, the anti-GPS interference performance of its test is all relatively poor, and measuring accuracy is all lower.
The utility model content
The utility model is for the low problem of measuring accuracy that solves present anti-GPS disturbed test, thereby a kind of anti-GPS EVAC (Evacuation Network Computer Model) is provided.
Anti-GPS disturbed test system, it comprises a jammer 1, No. two jammers 2, No. three jammers 3, an antenna 4, No. two antennas 5, No. three antennas 6, the withered antenna 7 of self-adaptation and spectrum analyzers 8;
An antenna 4 is used for receiving the undesired signal of jammer 1 output; No. two antennas 5 are used for receiving the undesired signal of No. two jammer 2 outputs; No. three antennas 6 are used for receiving the undesired signal of No. three jammer 3 outputs;
The end of the withered antenna 7 of self-adaptation is connected with an input end of spectrum analyzer 8; The end of an antenna 4 is connected with No. two input ends of spectrum analyzer 8;
The center that is arranged on test zone of the withered antenna 7 of self-adaptation, described No. two antennas 5 and No. three antennas 6 all are arranged on a side of the withered antenna 7 of self-adaptation, and respectively as a low elevation angle jamming equipment;
No. one antenna 4 is arranged in test zone, and as an EMI test equipment.
It also comprises the withered antenna working condition of self-adaptation checkout equipment 9, and the withered antenna working condition of described self-adaptation checkout equipment 9 is used for being received from the signal of the emission that adapts to withered antenna 7.
The position angle of No. two antennas 5 is-10 °, and pitching is 0 °.
The position angle of No. three antennas 6 is-10 °, and pitching is 0 °.
The position angle of an antenna 4 is-120 °, 0 ° or 120 °; Pitching is 0 °, 30 °, 60 ° or 90 °.
The utility model is disturbed under environment or three interference environments going alone, and tests anti-GPS interference performance all strong, and measuring accuracy is higher.
Description of drawings
Fig. 1 is structural representation of the present utility model; Fig. 2 is airdrop test test cloth station schematic diagram in embodiment, and in figure, mark 21 is that interference source, mark 22 are guided missile for target, mark 23.
Embodiment
Embodiment one, in conjunction with Fig. 1, this embodiment is described, anti-GPS disturbed test system, it comprises a jammer 1, No. two jammers 2, No. three jammers 3, an antenna 4, No. two antennas 5, No. three antennas 6, the withered antenna 7 of self-adaptation and spectrum analyzers 8;
An antenna 4 is used for receiving the undesired signal of jammer 1 output; No. two antennas 5 are used for receiving the undesired signal of No. two jammer 2 outputs; No. three antennas 6 are used for receiving the undesired signal of No. three jammer 3 outputs;
The end of the withered antenna 7 of self-adaptation is connected with an input end of spectrum analyzer 8; The end of an antenna 4 is connected with No. two input ends of spectrum analyzer 8;
The center that is arranged on test zone of the withered antenna 7 of self-adaptation, described No. two antennas 5 and No. three antennas 6 all are arranged on a side of the withered antenna 7 of self-adaptation, and respectively as a low elevation angle jamming equipment;
No. one antenna 4 is arranged in test zone, and as an EMI test equipment.
The difference of the described anti-GPS disturbed test of embodiment two, this embodiment and embodiment one system is, it also comprises the withered antenna working condition of self-adaptation checkout equipment 9, and the withered antenna working condition of described self-adaptation checkout equipment 9 is used for being received from the signal of the emission that adapts to withered antenna 7.
The difference of the described anti-GPS disturbed test of embodiment three, this embodiment and embodiment one system is, the position angle of No. two antennas 5 is-10 °, and pitching is 0 °.
The difference of the described anti-GPS disturbed test of embodiment four, this embodiment and embodiment one system is, the position angle of No. three antennas 6 is-10 °, and pitching is 0 °.
The difference of the described anti-GPS disturbed test of embodiment five, this embodiment and embodiment one system is, the position angle of an antenna 4 is-120 °, 0 ° or 120 °; Pitching is 0 °, 30 °, 60 ° or 90 °.
The present invention is a kind of ground fixed test method.
1) test method and requirement
A. test site is arranged: anti-interference test must be good in the receiving satellite signal condition, electromagnetic interference (EMI) is carried out without the ward of impact.Should guarantee not exist in environment Radio frequency interference (RFI) in the non-artificial system's band that applies in process of the test.Disturb scene to arrange as shown in figure 21.
(1) the 1# aerial position is variable, changes by orientation (120 °, 0 °, 120 °), pitching (0 °, 30 °, 60 °, 90 °), tests full spatial domain antijamming capability;
(2) 2#, 3# aerial position are fixed, and orientation (10 °, 10 °), pitching (0 °) are simulated respectively two low elevations angle and disturbed.By coordinating the change in location of 1# antenna, antijamming capability under test three interference environments.
B. use frequency spectrograph to demarcate interference source to the loss of receiving antenna array link, accurately control undesired signal in the interference signal level of receiving antenna actinal surface;
C. the satellite distribution situation of confirming there and then is not to be in criticality (only have 4 available stars, PDOP value critical etc.);
D. define undesired signal:
(1) GPS band interference: centre frequency is 1575.42MHz, and bandwidth is the 2MHz white Gaussian noise;
(2) frequency sweep is disturbed: 100 single-frequency points in the corresponding system bandwidth, each point stops 0.5s.
E. demarcate undesired signal:
(1) satellite-signal arrives the signal level at terrestrial receiving antenna place and is-130dBm.
(2) go alone and disturb under environment, anti-interference index request, is therefore demarcated undesired signal and is-70dBm to the power level of antenna reception actinal surface than (J/S) 〉=60dB in letter.
Therefore under (3) three interference environments, anti-interference index request jamming-to-signal ratio (J/S) 〉=50dB demarcates each undesired signal and is-80dBm to the power level of antenna reception actinal surface.
F. noiseless performance test: under noiseless environment, receive the real satellite signal, test guidance system bearing accuracy, system accuracy should satisfy index request;
G. go alone and disturb environment
Disturb under environment the test antijamming capability going alone.
(1) KFH-4 system normal operation, jammer is output power not;
(2) jammer (1# antenna) power is set to calibration value, jamming pattern is broadband interference, output power, and in guidance system, receiving trap should be able to normally be located;
(3) switching 1# potato masher antenna position, repeat (1)-(2);
(4) be that frequency sweep is disturbed with the jammer interference mode adjustment, repeat (1)-(3);
H. three interference environments
Under three interference environments, the test antijamming capability.
(1) the 1# antenna as go alone disturb test in, increase 2# antenna, 3# antenna interference, synchronously carry out three disturbed tests;
(2) jammer (three disturb) power is set to calibration value, jamming pattern is broadband interference, output power, and in guidance system, receiving trap should be able to normally be located;
(3) test guidance system bearing accuracy, system accuracy should satisfy index request;
(4) be that frequency sweep is disturbed with the jammer interference mode adjustment, repeat (1)-(3);
I. reject the satellite distribution situation during data analysis and be in test data under criticality.
2) qualified criterion
Apply when disturbing, if GPS can normally locate, system is in the integrated navigation state and bearing accuracy meets the demands (PDOP≤3 o'clock), it is qualified to judge.
4.5.2 airdrop test checking
Before carrying out airdrop test, need interference strength and the cloth station location of jammer are carried out clear and definite determining, make scientific and reasonable proof scheme.
Jammer interference intensity determines by equipment performance, and its intensity is 20W after measured.The below carries out calculative determination to its cloth station location.
A＝J/S
In formula
p
iBe the jammer power input, the mw of unit;
R be and jammer between distance, the m of unit;
F is interfering frequency, 1575.42MHz;
C is the light velocity;
S be satellite-signal intensity approximately ,-130dBm;
A is jamming-to-signal ratio.
Draw as calculated following table:
Table 1 interference distance and the corresponding jamming-to-signal ratio table of comparisons
As shown in Table 1 jammer is placed in along the 5km place before the direction drop point of dropping a bomb, the jammer antenna direction points to the carrier aircraft bomb-release point, it is 60dB (identical with index) in the 7km place value of being disturbed, be 63dB (a little more than index) in the 5km place value of being disturbed, namely explanation is if can judge that by telemetry system and actual target practice result the receiver that connects anti-interference antenna can normally receive the star location and show that the antijamming capability of anti-interference antenna satisfies index request.
Claims (5)
1. anti-GPS disturbed test system, it is characterized in that: it comprises a jammer (1), No. two jammers (2), No. three jammers (3), an antenna (4), No. two antennas (5), No. three antennas (6), the withered antenna of self-adaptation (7) and spectrum analyzer (8);
An antenna (4) is used for receiving the undesired signal of a jammer (1) output; No. two antennas (5) are used for receiving the undesired signal of No. two jammers (2) output; No. three antennas (6) are used for receiving the undesired signal of No. three jammers (3) output;
The end of the withered antenna of self-adaptation (7) is connected with an input end of spectrum analyzer (8); The end of an antenna (4) is connected with No. two input ends of spectrum analyzer (8);
The center that is arranged on test zone of the withered antenna of self-adaptation (7), described No. two antennas (5) and No. three antennas (6) all are arranged on a side of the withered antenna of self-adaptation (7), and respectively as a low elevation angle jamming equipment;
An antenna (4) is arranged in test zone, and as an EMI test equipment.
2. anti-GPS disturbed test according to claim 1 system, it is characterized in that it also comprises the withered antenna working condition of self-adaptation checkout equipment (9), the withered antenna working condition of described self-adaptation checkout equipment (9) is used for being received from the signal of the emission that adapts to withered antenna (7).
3. anti-GPS disturbed test according to claim 1 system, is characterized in that the position angle of No. two antennas (5) is-10 °, and pitching is 0 °.
4. anti-GPS disturbed test according to claim 1 system, is characterized in that the position angle of No. three antennas (6) is-10 °, and pitching is 0 °.
5. anti-GPS disturbed test according to claim 1 system, is characterized in that the position angle of an antenna (4) is-120 °, 0 ° or 120 °; Pitching is 0 °, 30 °, 60 ° or 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220679983 CN202939310U (en) | 2012-12-11 | 2012-12-11 | GPS-interference resistant test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220679983 CN202939310U (en) | 2012-12-11 | 2012-12-11 | GPS-interference resistant test system |
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| Publication Number | Publication Date |
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| CN202939310U true CN202939310U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220679983 Expired - Fee Related CN202939310U (en) | 2012-12-11 | 2012-12-11 | GPS-interference resistant test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869333A (en) * | 2012-12-11 | 2014-06-18 | 吕涛 | Anti-GPS interference test system |
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2012
- 2012-12-11 CN CN 201220679983 patent/CN202939310U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869333A (en) * | 2012-12-11 | 2014-06-18 | 吕涛 | Anti-GPS interference test system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20131211 |