CN105158776A - Method for testing OTA of Beidou equipment assisted by communication network - Google Patents

Method for testing OTA of Beidou equipment assisted by communication network Download PDF

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Publication number
CN105158776A
CN105158776A CN201510357282.5A CN201510357282A CN105158776A CN 105158776 A CN105158776 A CN 105158776A CN 201510357282 A CN201510357282 A CN 201510357282A CN 105158776 A CN105158776 A CN 105158776A
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Prior art keywords
carrier
test
noise ratio
antenna
turntable
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Chinese (zh)
Inventor
安旭东
陈晓晨
张钦娟
任林林
张博钧
陈少波
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SHENZHEN INSTITUTE OF TELECOMMUNICATIONS
China Academy of Information and Communications Technology CAICT
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SHENZHEN INSTITUTE OF TELECOMMUNICATIONS
China Academy of Telecommunications Research CATR
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Priority to CN201510357282.5A priority Critical patent/CN105158776A/en
Publication of CN105158776A publication Critical patent/CN105158776A/en
Pending legal-status Critical Current

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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
    • 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
    • G01S19/20—Integrity monitoring, fault detection or fault isolation of space segment

Abstract

The present invention relates to a system and a method for testing OTA (Over-the-Air) of Beidou equipment assisted by a communication network. The system comprises a comprehensive test terminal, a measuring antenna, two groups of communication antennas, a Beidou satellite signal source, a mobile network simulator, a rotary table, a rotary table controller, and a fully anechoic chamber. The method comprises the following testing steps: 1, testing a spatial directional diagram of carrier-to-noise ratios; 2, linearizing the spatial directional diagram of carrier-to-noise ratios; 3; testing single point equivalent isotropic sensitivity; and 4, calculating to obtain spatial total isotropic sensitivity. The system and the method of the present invention solve the problem of testing OTA of Beidou equipment assisted by a communication network through integral design of the system, test parameter setting for the spatial directional diagram of carrier-to-noise ratios, and test parameter setting for the single point equivalent isotropic sensitivity, and a testing result can reflect the performance of the equipment in spatial three dimensional directions.

Description

The Big Dipper device space performance test methods that a kind of communication network is auxiliary
Technical field
The Beidou navigation device space performance system that space Performance Test System and the method, particularly a kind of communication network that the present invention relates to a kind of Beidou navigation equipment are assisted and method of testing.
Background technology
The Beidou navigation location that communication network is auxiliary is a kind of technology combining satellite information and communication network information and position terminal.Do not rely on Beidou satellite navigation and positioning system merely when navigator fix, communication network transmission auxiliary positioning information can also be utilized, can primary positioning time be shortened, improve receiving sensitivity.
Space performance test (Over-the-Air, OTA) fully anechoic chamber can be utilized to carry out the three dimensions performance of testing apparatus, and by the test to different conditions such as free space, the number of people, staff, can simulate the operation of people to the impact of space performance, therefore space performance test has very important meaning for the Big Dipper equipment performance that assessment communication network is auxiliary.
For the space performance of antenna, usually use total omnidirectional sensitivity (TotalIsotropicSensitivity, TIS) to weigh, the three dimensions receiving sensitivity performance of reflection antenna.The space performance test of current cellular communication antenna and AGPS antenna can according to international standard " CTIA3.3, TestPlanforWirelessDeviceOver-the-AirPerformance, 2013-10 " test, and for the Big Dipper equipment that communication network is assisted, there is no testing standard at present can reference.Therefore, existing antenna space performance test standard can only for cellular communication antenna and AGPS antenna, not for the Beidou antenna that communication network is auxiliary.
Due to reasons such as Beidou receiver and the GPS differences in sensitivity, the parameters such as the parameter set when the Big Dipper device space performance of test communications network assistance, particularly satellite-signal performance number are different from arranging certainty during the performance test of AGPS space.Therefore, the Big Dipper device space performance that current existing AGPS space performance testing standard carrys out test communications network assistance can not directly be applied.
Summary of the invention
The Big Dipper device space performance methodology of assisting for current shortage communication network and the present situation of standard, the object of this invention is to provide the auxiliary Big Dipper device space Performance Test System of a kind of communication network and method of testing.
The object of the present invention is achieved like this: the Big Dipper device space Performance Test System that a kind of communication network is auxiliary, comprise the fully anechoic chamber for simulating free space environment, it is characterized in that: a turntable is installed in fully anechoic chamber, turntable is laid tested subscriber computer, simultaneously, be provided with in fully anechoic chamber and measure antenna and two group communication antennas, one group communication antenna is the emitting antenna for launching Big Dipper satellite signal, and another group communication antenna is the dual-mode antenna for receiving and dispatching mobile network signals;
Big Dipper satellite signal source connects emitting antenna, produces Beidou satellite navigation signal for simulating, emulation satellite transit track, air time delay error and user movement track, builds navigation receiving terminal simulation work environment in laboratory conditions;
Mobile network's simulator connects dual-mode antenna, for anolog base station signal, sends auxiliary positioning information;
Turntable controller connects turntable, rotating, testing the carrier-to-noise ratio of tested subscriber computer in different angles, receiving sensitivity index for controlling turntable;
Integration test terminal connects Big Dipper satellite signal source, mobile network's simulator, turntable controller and test antenna, for controlling above-mentioned test instrumentation and tested subscriber computer, analytical test result.
The Big Dipper device space performance test methods that a kind of communication network of the present invention is auxiliary, test macro comprises the fully anechoic chamber for simulating free space environment, one turntable is installed in fully anechoic chamber, turntable is laid tested subscriber computer, simultaneously, be provided with in fully anechoic chamber and measure antenna and two group communication antennas, a group communication antenna is the emitting antenna for launching Big Dipper satellite signal, and another group communication antenna is the dual-mode antenna for receiving and dispatching mobile network signals;
Big Dipper satellite signal source connects emitting antenna, produces Beidou satellite navigation signal for simulating, emulation satellite transit track, air time delay error and user movement track, builds navigation receiving terminal simulation work environment in laboratory conditions;
Mobile network's simulator connects dual-mode antenna, for anolog base station signal, sends auxiliary positioning information;
Turntable controller connects turntable, rotating, testing the carrier-to-noise ratio of tested subscriber computer in different angles, receiving sensitivity index for controlling turntable;
Integration test terminal connects Big Dipper satellite signal source, mobile network's simulator, turntable controller and test antenna, for controlling above-mentioned test instrumentation and tested subscriber computer, analytical test result;
Testing procedure is:
The first step, carrier-to-noise ratio spatial pattern ai is tested: first arrange the first scenario parameters, and after setting parameter, turntable controller controls turntable to start to rotate, and test macro obtains the carrier-to-noise ratio numerical value of Big Dipper equipment on each position of three dimensions;
Second step, carrier-to-noise ratio direction in space linearization: tested Big Dipper equipment is placed on the maximum position of episphere carrier-to-noise ratio numerical value, satellite power is set to certain numerical value, then be that step-length reduces gradually with 1dB, until system can not obtain carrier-to-noise ratio numerical value from terminal, in record satellite power change procedure, the corresponding relation of magnitude of power and carrier-to-noise ratio numerical value, obtains one group of performance number and one group of corresponding carrier-to-noise ratio value;
3rd step, single-point equivalence omnidirectional sensibility test: arrange the second scenario parameters, then, on the position that episphere carrier-to-noise ratio numerical value is maximum, big-dipper satellite power declines with a fixed step size, positions under each power rating to tested Big Dipper equipment; Positioning result is compared calculating with actual position by test macro, obtains positioning error; Under each power rating, carry out multiple bearing, acquisition receiving sensitivity is the single-point equivalence omnidirectional sensibility on best direction;
4th step, calculate space total omnidirectional sensitivity: according to the test result of the single-point equivalence omnidirectional sensibility in the test result of first step carrier-to-noise ratio spatial pattern ai, the linearizing result of second step and the 3rd step preferably on direction, calculate sensitivity of other points on three-dimensional sphere; During calculating, utilize linearization result, obtain corresponding satellite power value according to the carrier-to-noise ratio on each position, then according to the relation of the satellite power value on this position and the satellite power value on best direction, calculate the single-point equivalence omnidirectional sensibility on this position; In like manner, the single-point equivalence omnidirectional sensibility on all positions is calculated; Then calculate total omnidirectional sensitivity, formula is as follows:
T I R S = ~ 2 N M π Σ i = 2 4 Σ j = 0 M - 1 [ 1 EIS θ ( θ i , φ j ) + 1 EIS φ ( θ i , φ j ) ] sin ( θ i )
Wherein, N is the space-number on Theta direction, and M is the space-number on Phi direction, and two numerical value are all even numbers; EIS is the single-point equivalence omnidirectional sensibility on sphere under each polarization mode on each position.
The present invention is by arranging test macro global design and the setting of carrier-to-noise ratio spatial pattern ai test parameter, single-point equivalence omnidirectional sensibility test parameter, solve the Big Dipper device space performance test difficult problem that communication network is auxiliary, test result can reflect the performance of equipment on space three-dimensional direction.
Accompanying drawing explanation
Fig. 1 test macro schematic diagram
Embodiment
The Big Dipper device space performance test that communication network is assisted is tested by fully anechoic chamber, and test macro as shown in Figure 1.
Wherein mainly comprise integration test terminal, measure antenna, two group communication antennas, Big Dipper satellite signal source, mobile network's simulator, turntable controller and microwave dark room etc.Integration test terminal is for controlling test instrumentation and tested subscriber computer, analytical test result etc., communication antenna one is for launching Big Dipper satellite signal, one for receiving and dispatching mobile network signals, Big Dipper satellite signal source produces Beidou satellite navigation signal for simulating, emulation satellite transit track, air time delay error and user movement track, build navigation receiving terminal simulation work environment in laboratory conditions, mobile network's simulator is used for anolog base station signal, send auxiliary positioning information, turntable controller controls turntable and rotates, test the carrier-to-noise ratio of tested subscriber computer in different angles, the indexs such as receiving sensitivity, fully anechoic chamber is for simulating free space environment.Testing procedure is as follows:
The first step, carrier-to-noise ratio spatial pattern ai is tested
During the test of carrier-to-noise ratio spatial pattern ai, scenario parameters arranges as shown in table 1.After setting parameter, turntable controller controls turntable to start to rotate, and test macro obtains the carrier-to-noise ratio numerical value of Big Dipper equipment on each position of three dimensions.Carrier-to-noise ratio on each position is by doing on average to obtain to the carrier-to-noise ratio of all visible satellites, in order to reduce uncertainty, duplicate measurements repeatedly, can being averaged to measurement result repeatedly if desired on each position again.
Table 1 first scenario parameters
Parameter Unit Value
Number of satellites - 6
HDOP scope - 1.4to 2.1
Path status - AWGN
Assisted error scope time thick seconds ±2
The signal power of all big-dipper satellites dBm -133
Second step, carrier-to-noise ratio direction in space linearization
Tested Big Dipper equipment is placed on the maximum position of episphere carrier-to-noise ratio numerical value, satellite power is set to certain numerical value, then be that step-length reduces with 1dB, till system can not obtain carrier-to-noise ratio numerical value from terminal, the corresponding relation of magnitude of power and carrier-to-noise ratio numerical value in record satellite power change procedure, what obtain is one group of performance number and one group of corresponding carrier-to-noise ratio value.
Carrier-to-noise ratio numerical value can be obtained by multiple distinct methods, if equipment under test support, wireless signal can be utilized to report test macro, or equipment under test first records all carrier-to-noise ratio numerical value, then by data cable or wireless connections, the data of storage are extracted.Two kinds of modes can be applied, but need to select same mode when testing with carrier-to-noise ratio spatial pattern ai.
On each measurement point, the corresponding relation of power and carrier-to-noise ratio value all needs to take multiple measurements averages to reduce uncertainty.
3rd step, the test of single-point equivalence omnidirectional sensibility
On the position that episphere carrier-to-noise ratio numerical value is maximum, the second scenario parameters is set by table 2.Big-dipper satellite power declines with a fixed step size, and under each power rating, tested Big Dipper equipment positions.Positioning result is compared calculating with actual position by test macro, obtains positioning error.Need to carry out multiple bearing under each power rating, location number of times is set to certain numerical value, as 100 times.If the positioning result error of 95% is all within the limit value of regulation, then continue reduce satellite power and judge positioning result, until the ratio of positioning error within limit value is lower than 95%, then record is for the last time lower than single-point equivalence omnidirectional sensibility (EffectiveIsotropicSensitivity, EIS) that the receiving sensitivity before 95% is on best direction.
Table 2 second scenario parameters
Parameter Unit Value
Number of satellites - 6
HDOP scope - 1.4to 2.1
Path status - AWGN
Assisted error scope time thick seconds ±2
The wherein signal power of a big-dipper satellite dBm -136
The signal power of other big-dipper satellites dBm -145
Response time seconds 20.3
Positioning error m 101.3
Position success rate 95％
Step-length dB 0.5
Note having the power setting of a satellite to be than other satellite power height 9dB in all satellites, be as the criterion with lower satellite power during single-point equivalence omnidirectional sensibility test.All need Beidou receiver cold start-up during each location.
Single-point equivalence omnidirectional sensibility can be obtained by multiple distinct methods, if terminal support, test macro can be reported by the mode of wireless signal, or terminal first records the location probability of failure under all each power, then by data cable or wireless connections, the data of storage are extracted.
4th step, calculates space total omnidirectional sensitivity
According to the test result of the single-point equivalence omnidirectional sensibility in the test result of first step carrier-to-noise ratio spatial pattern ai, the linearizing result of second step and the 3rd step preferably on direction, calculate sensitivity of other points on three-dimensional sphere.During calculating, utilize linearization result, obtain corresponding satellite power value according to the carrier-to-noise ratio on each position, then according to the relation of the satellite power value on this position and the satellite power value on best direction, calculate the single-point equivalence omnidirectional sensibility on this position.In like manner, the single-point equivalence omnidirectional sensibility on all positions is calculated.Then calculate total omnidirectional sensitivity, formula is as follows.
T I R S = ~ 2 N M π Σ i = 2 4 Σ j = 0 M - 1 [ 1 EIS θ ( θ i , φ j ) + 1 EIS φ ( θ i , φ j ) ] sin ( θ i )
Wherein, N is the space-number on Theta direction, and M is the space-number on Phi direction, and two numerical value are all even numbers.EIS is the single-point equivalence omnidirectional sensibility on sphere under each polarization mode on each position.
The innovation point of Big Dipper device space performance test methods of the present invention is as follows:
1) Design of Test System.The present invention devises a Big Dipper device space Performance Test System, and test result can reflect the performance of equipment on space three-dimensional direction.
2) carrier-to-noise ratio spatial pattern ai test parameter is arranged.The difference in receiving sensitivity etc. due to Beidou receiver and GPS, method proposed by the invention have employed the optimum configurations different from existing GPS device carrier-to-noise ratio spatial pattern ai testing standard when Big Dipper equipment carrier-to-noise ratio spatial pattern ai is tested, particularly satellite-signal power setting, specifically in table 1.Namely the present invention proposes a kind of optimum configurations being applicable to the test of Big Dipper equipment carrier-to-noise ratio spatial pattern ai.
3) single-point equivalence omnidirectional sensibility test parameter is arranged.Method proposed by the invention have employed the optimum configurations different from existing GPS device single-point equivalence omnidirectional sensibility testing standard when Big Dipper equipment single-point equivalence omnidirectional sensibility test, particularly satellite-signal power setting, specifically in table 2.Namely the present invention proposes a kind of optimum configurations being applicable to the test of Big Dipper equipment single-point equivalence omnidirectional sensibility.

Claims (4)

1. the Big Dipper device space Performance Test System that a communication network is auxiliary, comprise the fully anechoic chamber for simulating free space environment, it is characterized in that: a turntable is installed in fully anechoic chamber, turntable is laid tested subscriber computer, simultaneously, be provided with in fully anechoic chamber and measure antenna and two group communication antennas, a group communication antenna is the emitting antenna for launching Big Dipper satellite signal, and another group communication antenna is the dual-mode antenna for receiving and dispatching mobile network signals;
Big Dipper satellite signal source connects emitting antenna, produces Beidou satellite navigation signal for simulating, emulation satellite transit track, air time delay error and user movement track, builds navigation receiving terminal simulation work environment in laboratory conditions;
Mobile network's simulator connects dual-mode antenna, for anolog base station signal, sends auxiliary positioning information;
Turntable controller connects turntable, rotating, testing the carrier-to-noise ratio of tested subscriber computer in different angles, receiving sensitivity index for controlling turntable;
Integration test terminal connects Big Dipper satellite signal source, mobile network's simulator, turntable controller and test antenna, for controlling above-mentioned test instrumentation and tested subscriber computer, analytical test result.
2. the Big Dipper device space performance test methods that a communication network is auxiliary, it is characterized in that: test macro comprises the fully anechoic chamber for simulating free space environment, one turntable is installed in fully anechoic chamber, turntable is laid tested subscriber computer, simultaneously, be provided with in fully anechoic chamber and measure antenna and two group communication antennas, a group communication antenna is the emitting antenna for launching Big Dipper satellite signal, and another group communication antenna is the dual-mode antenna for receiving and dispatching mobile network signals;
Big Dipper satellite signal source connects emitting antenna, produces Beidou satellite navigation signal for simulating, emulation satellite transit track, air time delay error and user movement track, builds navigation receiving terminal simulation work environment in laboratory conditions;
Mobile network's simulator connects dual-mode antenna, for anolog base station signal, sends auxiliary positioning information;
Turntable controller connects turntable, rotating, testing the carrier-to-noise ratio of tested subscriber computer in different angles, receiving sensitivity index for controlling turntable;
Integration test terminal connects Big Dipper satellite signal source, mobile network's simulator, turntable controller and test antenna, for controlling above-mentioned test instrumentation and tested subscriber computer, analytical test result;
Testing procedure is:
The first step, carrier-to-noise ratio spatial pattern ai is tested: first arrange the first scenario parameters, and after setting parameter, turntable controller controls turntable to start to rotate, and test macro obtains the carrier-to-noise ratio numerical value of Big Dipper equipment on each position of three dimensions;
Second step, carrier-to-noise ratio direction in space linearization: tested Big Dipper equipment is placed on the maximum position of episphere carrier-to-noise ratio numerical value, satellite power is set to certain numerical value, then be that step-length reduces gradually with 1dB, until system can not obtain carrier-to-noise ratio numerical value from terminal, in record satellite power change procedure, the corresponding relation of magnitude of power and carrier-to-noise ratio numerical value, obtains one group of performance number and one group of corresponding carrier-to-noise ratio value;
3rd step, single-point equivalence omnidirectional sensibility test: arrange the second scenario parameters, then, on the position that episphere carrier-to-noise ratio numerical value is maximum, big-dipper satellite power declines with a fixed step size, positions under each power rating to tested Big Dipper equipment; Positioning result is compared calculating with actual position by test macro, obtains positioning error; Under each power rating, carry out multiple bearing, acquisition receiving sensitivity is the single-point equivalence omnidirectional sensibility on best direction;
4th step, calculate space total omnidirectional sensitivity: according to the test result of the single-point equivalence omnidirectional sensibility in the test result of first step carrier-to-noise ratio spatial pattern ai, the linearizing result of second step and the 3rd step preferably on direction, calculate sensitivity of other points on three-dimensional sphere; During calculating, utilize linearization result, obtain corresponding satellite power value according to the carrier-to-noise ratio on each position, then according to the relation of the satellite power value on this position and the satellite power value on best direction, calculate the single-point equivalence omnidirectional sensibility on this position; In like manner, the single-point equivalence omnidirectional sensibility on all positions is calculated; Then calculate total omnidirectional sensitivity, formula is as follows:
T I R S ≅ 2 N M π Σ i = 2 4 Σ j = 0 M - 1 [ 1 EIS θ ( θ i , φ j ) + 1 EIS φ ( θ i , φ j ) ] sin ( θ i )
Wherein, N is the space-number on Theta direction, and M is the space-number on Phi direction, and two numerical value are all even numbers; EIS is the single-point equivalence omnidirectional sensibility on sphere under each polarization mode on each position.
3. the Big Dipper device space performance test methods that communication network according to claim 2 is auxiliary, is characterized in that: the first scenario parameters is arranged as following table
Parameter Unit Value Number of satellites - 6 HDOP scope - 1.4to2.1 Path status - AWGN Assisted error scope time thick seconds ±2 The signal power of all big-dipper satellites dBm -133
。
4. the Big Dipper device space performance test methods that the communication network according to Claims 2 or 3 is auxiliary, is characterized in that: the second scenario parameters is arranged as following table
Parameter Unit Value Number of satellites - 6 HDOP scope - 1.4to2.1 Path status - AWGN Assisted error scope time thick seconds ±2 The wherein signal power of a big-dipper satellite dBm -136 The signal power of other big-dipper satellites dBm -145 Response time seconds 20.3 Positioning error m 101.3 Position success rate 95％ Step-length dB 0.5
。
CN201510357282.5A 2015-06-25 2015-06-25 Method for testing OTA of Beidou equipment assisted by communication network Pending CN105158776A (en)

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CN112198532A (en) * 2020-09-30 2021-01-08 哈尔滨工程大学 Beidou broadcast ephemeris maneuvering type fault monitoring method considering parameter sensitivity
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CN109752734A (en) * 2018-12-18 2019-05-14 联合汽车电子有限公司 Microwave dark room GPS test macro and method
CN109752734B (en) * 2018-12-18 2023-11-10 联合汽车电子有限公司 GPS test system and method for microwave darkroom
CN111308516A (en) * 2020-01-22 2020-06-19 上海移远通信技术股份有限公司 TTFF pressure testing method, system, equipment and medium of communication module
CN111766613A (en) * 2020-06-11 2020-10-13 Oppo广东移动通信有限公司 GPS function testing method and device and storage medium
CN111766613B (en) * 2020-06-11 2024-01-05 Oppo广东移动通信有限公司 GPS function test method and device and storage medium thereof
CN112198532A (en) * 2020-09-30 2021-01-08 哈尔滨工程大学 Beidou broadcast ephemeris maneuvering type fault monitoring method considering parameter sensitivity
CN112198532B (en) * 2020-09-30 2023-07-21 哈尔滨工程大学 Beidou broadcast ephemeris motor type fault monitoring method considering parameter sensitivity
CN112415544A (en) * 2020-11-26 2021-02-26 惠州Tcl移动通信有限公司 GPS test system, method and terminal equipment
CN112526556A (en) * 2020-11-27 2021-03-19 惠州Tcl移动通信有限公司 Positioning test method and device, storage medium and electronic equipment
CN112702130A (en) * 2020-12-18 2021-04-23 中国信息通信研究院 Method and device for testing satellite navigation positioning performance of wireless communication terminal
CN115811370A (en) * 2022-12-09 2023-03-17 荣耀终端有限公司 Positioning performance test method, related device and system
CN115811370B (en) * 2022-12-09 2023-09-22 荣耀终端有限公司 Positioning performance testing method, related device and system

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