CN108387911B - GPS test system - Google Patents
GPS test system Download PDFInfo
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- CN108387911B CN108387911B CN201810117776.XA CN201810117776A CN108387911B CN 108387911 B CN108387911 B CN 108387911B CN 201810117776 A CN201810117776 A CN 201810117776A CN 108387911 B CN108387911 B CN 108387911B
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- 238000012360 testing method Methods 0.000 title claims abstract description 81
- 230000035945 sensitivity Effects 0.000 claims abstract description 8
- 238000001228 spectrum Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 9
- 238000005562 fading Methods 0.000 claims description 5
- 238000012790 confirmation Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 8
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 230000003993 interaction Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention relates to a GPS test system, which comprises a main control device, wherein the main control device is connected with a channel simulator, an interference signal source device and a GPS signal source device, the interference signal source device and the GPS signal source device are connected with the channel simulator through radio frequency wires, and the channel simulator and the GPS signal source are connected with a test terminal through radio frequency wires. The technical scheme of the invention provides a GPS test system, which can accurately simulate various environments, and different interference signals are superimposed into the same channel by using a switch unit, so that the sensitivity and the anti-interference performance of the GPS can be visually confirmed, the defect of the GPS can be accurately judged, and the test system is repeatable, high in accuracy and measurement precision, high in measurement speed and capable of effectively improving the safety performance and the quality of the GPS.
Description
Technical Field
The invention relates to the technical field of communication equipment testing, in particular to a GPS (Global positioning System) testing system.
Background
The existing GPS (Global Positioning System) test system adopts an antenna darkroom or a microwave darkroom test method system, can only measure the positioning capability and signal strength of the GPS in general environmental conditions, and cannot simulate the positioning accuracy and receiving sensitivity under the conditions of Doppler, multipath fading and multipath interference in rural areas, plain and mountainous areas, and cannot comprehensively evaluate the performance of GPS products and improve the production quality and performance of the GPS due to the fact that the first positioning time, the anti-interference performance and other performance conditions of cold start and hot start are adopted.
Disclosure of Invention
The invention aims to provide a GPS test system which can accurately simulate various environments, can intuitively confirm the sensitivity and the anti-interference performance of a GPS by superposing different interference signals on the same channel by using a switch unit and accurately judge the defects of the GPS, and has the advantages of repeatability, high accuracy and measurement precision, high measurement speed and effectively improving the safety performance and the quality of the GPS.
The technical scheme for solving the technical problems is as follows:
the GPS test system comprises a main control device, wherein the main control device is connected with a channel simulator, an interference signal source device and a GPS signal source device, the interference signal source device and the GPS signal source device are connected with the channel simulator, and the channel simulator and the GPS signal source are connected with a test terminal.
Compared with the prior art, the invention has the beneficial effects that: the main control device of the product is a window for information interaction between the system and the outside, the instruction control and interaction of the system are realized through special serial port software on the main control device, the main control device controls various environments needing to be simulated in the channel simulator, the interference signal source device is controlled to generate continuous waves, additive Gaussian white noise interference signals and the GPS signal source is controlled to generate GPS map signals.
The channel simulator is mainly used for simulating signal environments of special environments such as cities, villages, plains, mountains and the like and simulating signal environments under Doppler, multipath fading and multipath interference conditions, and simulating the use of a GPS in a high-speed environment and in a multiparty interference environment; the interference signal source provides continuous wave with certain intensity and additive Gaussian white noise interference signal; the GPS signal source device generates GPS signals in the shielded test room.
Based on the technical scheme, the invention can also be improved as follows:
further, the number of the main control devices is 2, one main control device is connected with the channel simulator and the interference signal source device, and the other main control device is connected with the GPS signal source device.
The beneficial effects of adopting the further scheme are as follows: the system is convenient to realize instruction control and interaction of the system through special serial port software of the main control device, and is convenient for testers to distinguish and control the interference signal source device and the GPS signal source device.
Further, the interference signal source device and the GPS signal source device are connected with the channel simulator through a switch unit.
The beneficial effects of adopting the further scheme are as follows: the switch unit is used for collecting two paths or multiple paths of signals to be transmitted from the same link, or can be used for transmitting multiple paths or single signal from one link through the control of the switch, and the switch unit is used for transmitting the interference signal sent by the interference signal source device and the GPS signal sent by the GPS signal source device from the same link.
Further, the switch unit is an integrated switch unit integrating the circuit breaker and the power divider.
The beneficial effects of adopting the further scheme are as follows: the function of the signal of the switch unit collection is realized.
Further, the interference signal source device and the GPS signal source device are respectively connected with a spectrum analyzer.
The beneficial effects of adopting the further scheme are as follows: the interference signal source device is connected with the spectrum analyzer to check whether the signal frequency sent by the interference signal source device is correct or not; the GPS signal source device is respectively connected with the frequency spectrum analyzer to check whether the GSP signal frequency and the signal intensity are correct.
Further, the channel simulator is connected with the main control device through a serial port.
The beneficial effects of adopting the further scheme are as follows: and the connection of the channel simulator and the main control device is facilitated.
Further, the GPS signal source device is an E4438C signal generator.
The beneficial effects of adopting the further scheme are as follows: digital modulation providing analog modulation, excellent level accuracy and spectral purity.
Further, the interference signal source device is an E8257D signal generator.
The beneficial effects of adopting the further scheme are as follows: with better output power, level accuracy and phase noise performance up to 67GHz, has high output power and excellent level accuracy, and does not need to be provided with an external amplifier for testing high-power equipment.
Drawings
FIG. 1 is a block diagram of the product of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the system comprises a main control device, a channel simulator, an interference signal source device, a GPS signal source device, a test terminal, a switch unit, a spectrum analyzer and a frequency spectrum analyzer.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, a GPS test system includes a main control device 1, where the main control device 1 is connected with a channel simulator 2, an interference signal source device 3 and a GPS signal source device 4, the interference signal source device 3 and the GPS signal source device 4 are connected with the channel simulator 2, and the channel simulator 2 and the GPS signal source are connected with a test terminal 5.
The main control device 1 is a window for information interaction between the system and the outside, the instruction control and interaction of the system are realized through special serial port software on the main control device 1, the main control device 1 controls various environments needing to be simulated in the channel simulator 2, the interference signal source device 3 is controlled to generate continuous waves, the additive Gaussian white noise interference signal and the GPS signal source is controlled to generate GPS map signals.
The channel simulator 2 mainly simulates signal environments of special environments such as cities, villages, plains, mountains and the like and simulates signal environments under Doppler, multipath fading and multipath interference conditions, and simulates the use of a GPS in a high-speed environment and in a multiparty interference environment; the interference signal source provides continuous wave with certain intensity and additive Gaussian white noise interference signal; the GPS signal source device 4 generates GPS signals in the shielded test room.
Preferably, the number of the master devices 1 is 2, one of the master devices 1 is connected with the channel simulator 2 and the interference signal source device 3, and the other master device 1 is connected with the GPS signal source device 4. The system is convenient to realize instruction control and interaction of the system through special serial port software of the main control device 1, and is convenient for testers to distinguish and control the interference signal source device 3 and the GPS signal source device 4.
Preferably, the interference signal source device 3 and the GPS signal source device 4 are connected to the channel simulator 2 via a switching unit 6. The switch unit 6 is used for collecting two or more signals to be transmitted from the same link, or can transmit multiple or single signals from one link through the control of a switch, and is used for transmitting the interference signal sent by the interference signal source device 3 and the GPS signal sent by the GPS signal source device 4 from the same link.
Preferably, the switch unit 6 is an integrated switch unit 6 integrating a circuit breaker and a power divider. The function of the aggregate signal of the switching unit 6 is achieved.
Preferably, the interference signal source device 3 and the GPS signal source device 4 are connected to a spectrum analyzer 7, respectively. The interference signal source device 3 is connected with the spectrum analyzer 7 to check whether the signal frequency and the signal strength of the signal sent by the interference signal source device 3 are correct; the GPS signal source device 4 is connected to the spectrum analyzer 7 to check whether the GSP signal frequency and signal strength are correct.
Preferably, the channel simulator 2 is connected to the master device 1 through a serial port. Facilitating the connection of the channel simulator 2 to said master device 1.
Preferably, the GPS signal source device 4 is an E4438C signal generator. Digital modulation providing analog modulation, excellent level accuracy and spectral purity.
Preferably, the interference signal source device 3 is an E8257D signal generator. With better output power, level accuracy and phase noise performance up to 67GHz, has high output power and excellent level accuracy, and does not need to be provided with an external amplifier for testing high-power equipment.
The GPS is a very common global positioning system, and the L1 carrier wave of the GPS system is used by the common civil GPS, the frequency is 1575.42MHz, so that the common GPS satellites run around the earth in a period of 12 hours on the high altitude of 1 ten thousand 2 km from the ground, more than 4 satellites can be observed at any point on the ground at any moment, and the GPS can effectively perform 2D (planar map) and 3D (stereoscopic map) positioning.
In the preferred embodiment of the invention, the positioning accuracy and the receiving sensitivity of the GPS can be tested, and the TTFF (first positioning time) of the hot start and the warm start of the cold start is used for resisting the interference; in particular, the reception sensitivity and the interference resistance are verified, and the overall performance evaluation is performed on the GPS test terminal 5.
The working process of testing the GPS test terminal 5 by adopting the test system is as follows:
the signal outside the testing chamber where the testing system is located is shielded, and the signal source in the testing chamber is ensured to come from all devices of the testing system only.
GPS positioning precision, receiving sensitivity, and a test process of TTFF of cold start and hot start temperature start:
1) The main control device 1 is used for controlling the channel simulator 2, combining and setting up the environment, simulating the signal state of the GPS in the special environments such as villages, plain, mountainous areas and the like, testing under the conditions of Doppler, multipath fading and multipath interference, ensuring that the signal source and the interference source pass through the channel simulator 2 when the strength of each signal is-100 to-120 dbm in the testing process, and then transmitting the signals to the GPS test terminal 5.
2) Two different sets of maps of the GPS signal source device 4 are set using the master control device 1, the number of satellites is set, and the altitude, longitude, latitude in the maps are set.
3) The GPS test terminal 5 is connected to the GPS signal source device 4, and checks whether or not a signal can be normally accessed, and checks the accuracy of a confirmation signal using the spectrum analyzer 7, and after the check is completed, the connection between the test terminal 5 and the GPS signal source device 4 is disconnected.
4) The main control device 1 controls the GPS signal source device 4 to generate signals through a serial port connected with the signal source device, confirms whether the transmitted GPS signals are correct through the main control device 1, enables the signals to be transmitted immediately after judging the correct GPS signals, selects satellite numbers and confirms a satellite map of the signal source, and generates effective GPS signals.
5) After the useful GPS signal emitted by the GPS signal source device 4 is turned on, the signal intensity of about-100 dBm is set so as to prevent the GPS from being unable to locate due to the overlarge set signal intensity.
6) The GPS signal source from the GPS signal source device 4 is connected to the spectrum analyzer 7, and it is checked whether the frequency and signal strength of the signal are accurate.
7) The GPS test terminal 5 is connected with the channel simulator 2, the test terminal 5 is started to position, and signals are transmitted to the channel simulator 2 through the switch unit 6.
8) The GPS test terminal 5 is connected to perform testing and record the GPS 2D positioning time and the GPS 3D positioning time of the simulated special signal environment, and the GPS has to be restarted when different signal strengths are tested.
The GPS test terminal 5 is fully powered off, and after restarting, the map is switched to be used for measuring the positioning time, and the measured time data is the cold starting TTFF (first positioning time);
in the positioning process, the GPS test terminal 5 is directly restarted, and then the positioning time is measured, and the positioning time data is the hot start TTFF (first positioning time);
9) And reading the longitude, latitude and altitude of the positioning on the GPS test terminal 5, and comparing the actual longitude, latitude and altitude of the map in the GPS signal source device 4 to obtain the positioning precision of the test terminal 5.
10 After the positioning is completed, the signal of the GPS signal source device 4 is gradually reduced by taking 1dbm as a step length until the GPS test terminal 5 cannot receive the signal sent by the signal source device, and the signal intensity of the GPS signal source device 4, namely the final receiving sensitivity, is recorded.
11 The interference signal source device 3 is turned on, the interference signal with the same frequency is set, the intensity of the interference signal is set to be-71 dbm, the accuracy of the frequency of the signal and the intensity of the signal detected by the spectrum analyzer 7 is accessed, and the interference signal is input into the channel simulator 2 through the combination of the switch unit 6 and the signal sent by the GPS signal source device 4.
12 The test terminal 5 is connected to the channel simulator 2, the test steps from 8) to 10) are repeated, and test results of the number of searched satellites with and without the interference sources and the altitude, longitude and latitude in the map are compared to obtain test data.
The testing process of the anti-interference degree test comprises the following steps:
1) The interference signal source device 3 is controlled to emit a continuous wave signal source and an additive white gaussian noise interference signal by using the master device 1, and the accuracy of the frequency and signal strength of the interference source signal is checked by using the spectrum analyzer 7.
2) The GPS signal source device 4 is turned on, the interference signal of the signal interference source device is turned off, and the accuracy of the signal frequency and the signal strength of the signal source of the GPS signal source device 4 is checked using the spectrum analyzer 7.
3) The signal source and the interference source are connected by using the switch unit 6, the other end of the combination is connected to the channel simulator 2 by contacting the radio frequency line, and the GPS test terminal 5 is connected to the channel simulator 2 by the radio frequency line.
4) And opening the GPS test terminal 5 to finish 3D positioning, opening an interference signal of the signal interference source device, and modulating the frequency of the interference source signal to 1574.42MHz.
5) Under the condition that the analog signal is unchanged, the continuous wave interference signals are set to be the same in frequency and power respectively, then the interference signals are gradually increased in the amplitude of 1dBm, and the GPS test terminal 5 loses navigation positioning when the intensity of the interference signals is detected. And setting the additive white Gaussian noise interference signal to be the same in frequency and power, carrying out the same operation, and recording the signal strength of the interference source, wherein the strength is the maximum signal strength acceptable by the GPS test terminal 5.
The use performance and the anti-interference performance of the GPS test terminal 5 under various outdoor conditions can be checked indoors through the test system, so that the benefit is practically improved; the cost is reduced, the consistency and the effectiveness of the test can be ensured, and most importantly, the problem is checked before the use, so that the safety of the GPS test terminal 5 in the use process can be ensured.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The GPS test system is characterized by comprising a main control device (1), wherein the main control device (1) is connected with a channel simulator (2), an interference signal source device (3) and a GPS signal source device (4), the interference signal source device (3) and the GPS signal source device (4) are connected with the channel simulator (2) through radio frequency lines, and the channel simulator (2) and the GPS signal source are connected with a test terminal (5) through radio frequency lines;
wherein, the number of the main control devices (1) is 2, one main control device (1) is connected with the channel simulator (2) and the interference signal source device (3), and the other main control device (1) is connected with the GPS signal source device (4);
the interference signal source device (3) and the GPS signal source device (4) are connected with the channel simulator (2) through a switch unit (6);
the switch unit (6) is an integrated switch unit integrating the circuit breaker and the power divider into a whole;
wherein, the interference signal source device (3) and the GPS signal source device (4) are respectively connected with a frequency spectrum analyzer (7);
the testing process of the first positioning time TTFF of the cold start and hot start temperature start comprises the following steps:
1) The channel simulator is controlled by the main control device, the environment is built in a combined way, and the signal source and the interference source are ensured to pass through the channel simulator when the strength of each signal is-100 to-120 dbm in the test process under the test of Doppler, multipath fading and multipath interference conditions, and then transmitted to the GPS test terminal;
2) Setting two groups of different maps of the GPS signal source device by using the main control device, and setting the number of satellites and the altitude, longitude and latitude in the maps;
3) Connecting a GPS test terminal to a GPS signal source device, checking whether signals can be normally accessed, checking the accuracy of the confirmation signals by using a spectrum analyzer, and disconnecting the test terminal from the GPS signal source device after the checking is finished;
4) The main control device controls the GPS signal source device to generate signals through a serial port connected with the signal source device, confirms whether the transmitted GPS signals are correct or not through the main control device, enables the signals to be transmitted immediately after judging the correct GPS signals, selects satellite numbers and confirms, selects a satellite map of the signal source, and generates effective GPS signals;
5) After the useful GPS signal sent by the GPS signal source device is turned on, the signal intensity of about-100 dBm is set so as to prevent the GPS with overlarge signal intensity from being unable to locate;
6) A GPS signal source sent by a GPS signal source device is connected to a spectrum analyzer, and whether the frequency and the signal strength of a signal are accurate or not is checked;
7) Connecting a GPS test terminal with a channel simulator, starting the test terminal for positioning, and transmitting signals to the channel simulator through a switch unit;
8) Connecting a GPS test terminal to test and recording the GPS 2D positioning time and the GPS 3D positioning time of the simulated special signal environment, and restarting the GPS when testing different signal intensities;
the GPS test terminal is fully powered off, and after restarting, the map is switched to be used for measuring the positioning time, and the measured time data is the cold starting TTFF;
in the positioning process, directly restarting the GPS test terminal, and then measuring the positioning time, wherein the positioning time data is the hot start TTFF;
9) Reading the longitude, latitude and altitude of positioning on the GPS test terminal, and comparing the actual longitude, latitude and altitude of the map in the GPS signal source device to obtain the positioning precision of the test terminal;
10 After the positioning is completed, gradually reducing the signal of the GPS signal source device by taking 1dbm as a step length until the GPS test terminal cannot receive the signal sent by the signal source device, and recording the signal intensity of the GPS signal source device, wherein the signal intensity is the final receiving sensitivity;
11 Opening an interference signal source device, setting interference signals with the same frequency, setting the intensity of the interference signals to-71 dbm, accessing the accuracy of the frequency of the detection signals of the spectrum analyzer and the intensity of the signals, and inputting the interference signals into a channel simulator through a signal combining way sent by a switch unit and the GPS signal source device;
12 And (3) connecting the test terminal to the channel simulator, repeating the test steps from 8) to 10), and comparing the number of searched satellites with the interference source and without the interference source with the test results of the altitude, longitude and latitude in the map to obtain test data.
2. A GPS test system according to claim 1, characterized in that the channel simulator (2) is connected to the master control device (1) via a serial port.
3. A GPS test system according to claim 1, wherein the GPS signal source device (4) is an E4438C signal generator.
4. A GPS test system according to claim 1, characterized in that the interfering signal source means (3) is an E8257D signal generator.
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| CN201810117776.XA CN108387911B (en) | 2018-02-06 | 2018-02-06 | GPS test system |
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| CN201810117776.XA CN108387911B (en) | 2018-02-06 | 2018-02-06 | GPS test system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109788112B (en) * | 2019-02-25 | 2023-10-20 | 深圳市摩尔环宇通信技术有限公司 | 5G terminal anti-interference degree test method, system and equipment |
| CN111522257A (en) * | 2020-05-08 | 2020-08-11 | 安徽江淮汽车集团股份有限公司 | Vehicle positioning test method, device, equipment and storage medium |
| CN111929710B (en) * | 2020-06-30 | 2022-10-28 | 中国科学院国家授时中心 | A factory test method for Beidou satellite navigation signal quality assessment |
| CN113687391B (en) * | 2021-09-13 | 2024-07-30 | 中国信息通信研究院 | Satellite navigation positioning performance rapid test method and device for wireless terminal |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854518A (en) * | 2011-06-30 | 2013-01-02 | 希姆通信息技术（上海）有限公司 | System and method for automatically testing positioning time of GPS (global positioning system) receiver |
| CN104698474A (en) * | 2015-04-02 | 2015-06-10 | 芜湖航飞科技股份有限公司 | Satellite navigation receiver anti-jamming testing system and method |
| KR20150123372A (en) * | 2014-04-24 | 2015-11-04 | 주식회사 넷커스터마이즈 | Hybrid satellite navigation signal generator |
| CN105093240A (en) * | 2015-09-11 | 2015-11-25 | 北京航空航天大学 | Satellite navigation terminal electromagnetic compatibility test device based on orthogonal signal input and test method |
| KR101704601B1 (en) * | 2015-10-16 | 2017-02-08 | 국방과학연구소 | A system for testing a satellite receiver receiving a multi anti-jamming signal |
| CN106597485A (en) * | 2016-12-13 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Beidou satellite navigation equipment interference resistance performance test system |
| CN207780247U (en) * | 2018-02-06 | 2018-08-28 | 深圳市摩尔环宇通信技术有限公司 | A kind of GPS tests system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6882310B1 (en) * | 2003-10-15 | 2005-04-19 | Raytheon Company | Direct sampling GPS receiver for anti-interference operations |
| FI127693B (en) * | 2016-02-18 | 2018-12-14 | Verkotan Oy | Test procedure and test arrangements for GPS positioning measurements |
-
2018
- 2018-02-06 CN CN201810117776.XA patent/CN108387911B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854518A (en) * | 2011-06-30 | 2013-01-02 | 希姆通信息技术（上海）有限公司 | System and method for automatically testing positioning time of GPS (global positioning system) receiver |
| KR20150123372A (en) * | 2014-04-24 | 2015-11-04 | 주식회사 넷커스터마이즈 | Hybrid satellite navigation signal generator |
| CN104698474A (en) * | 2015-04-02 | 2015-06-10 | 芜湖航飞科技股份有限公司 | Satellite navigation receiver anti-jamming testing system and method |
| CN105093240A (en) * | 2015-09-11 | 2015-11-25 | 北京航空航天大学 | Satellite navigation terminal electromagnetic compatibility test device based on orthogonal signal input and test method |
| KR101704601B1 (en) * | 2015-10-16 | 2017-02-08 | 국방과학연구소 | A system for testing a satellite receiver receiving a multi anti-jamming signal |
| CN106597485A (en) * | 2016-12-13 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Beidou satellite navigation equipment interference resistance performance test system |
| CN207780247U (en) * | 2018-02-06 | 2018-08-28 | 深圳市摩尔环宇通信技术有限公司 | A kind of GPS tests system |
Non-Patent Citations (2)
| Title |
|---|
| "Effect of radio frequency interference (RFI) on the Global Positioning System (GPS) signals";Ahmad Norhisyam Idris et al;《2013 IEEE 9th International Colloquium on Signal Processing and its Applications》;第199-204页 * |
| "基于微波暗室GNSS抗干扰接收机的测试方法";郭淑霞等;《数据采集与处理》;第28卷(第6期);第807-811页 * |
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