A method for evaluating comprehensive performance of a navigation terminal based on a microwave anechoic chamber

Abstract

The application relates to a navigation terminal comprehensive performance test evaluation method based on a microwave darkroom, and belongs to the technical field of satellite navigation. The application simulates the use conditions and various scenes possibly encountered by a navigation terminal in actual use for testing by constructing a navigation terminal comprehensive performance test platform based on a microwave darkroom and constructing a navigation terminal comprehensive performance test scene, and performs comprehensive performance evaluation according to positioning / short message communication information reported by the navigation terminal. The application simulates the scenes possibly encountered by the tested terminal in actual application through a comprehensive test scene formed by multiple application scenes, the test result is closer to the actual application, and the application has good actual application value.

Description

Technical Field

[0001] The present invention is mainly applied to the field of satellite navigation, and in particular relates to a comprehensive performance test and evaluation method for a navigation terminal in a microwave darkroom. Background Art

[0002] With the development of Beidou satellites and systems, Beidou navigation terminals have been widely used across all branches of the military. Traditional navigation terminal testing relies primarily on multiple test items in a darkroom environment. This testing process requires multiple power cycles and command interactions with the navigation terminal under test, which does not fully reflect the terminal's performance under actual use conditions. Therefore, based on the test conditions of a microwave darkroom, a comprehensive performance test scenario for navigation terminals is constructed to simulate the actual use conditions and various scenarios that the navigation terminal may encounter. A comprehensive performance evaluation is then conducted based on the positioning and short message communication information reported by the navigation terminal. Summary of the Invention

[0003] The purpose of the present invention is to address the problem that the existing microwave anechoic chamber-based navigation terminal performance test is based on navigation terminal test items and cannot reflect the performance of the navigation terminal under actual usage conditions. By constructing a navigation terminal comprehensive performance test scenario, a microwave anechoic chamber-based navigation terminal comprehensive performance evaluation method is designed. Based on microwave anechoic chamber conditions, the present invention simulates the actual operating conditions and environment of the navigation terminal to achieve comprehensive performance testing and evaluation of the navigation terminal. Compared with the test evaluation based on traditional microwave anechoic chamber test items, the present invention has the characteristics of "no perception" of the tested terminal during the test process, and the test results are closer to actual application, thus having great practical application value.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A method for comprehensive performance testing and evaluation of a navigation terminal based on a microwave anechoic chamber comprises the following steps:

[0006] Step 1: Build a comprehensive performance test platform for navigation terminals based on a microwave anechoic chamber;

[0007] Step 2: Build a comprehensive performance test scenario for the navigation terminal. The test scenario covers various scenarios that the navigation terminal may encounter in actual use.

[0008] Step 3: The test evaluation software broadcasts the navigation terminal comprehensive performance test scenario by controlling the navigation signal simulator, the interference signal simulator, and the test turntable. The inbound signal processing device receives the inbound signal transmitted by the terminal under test.

[0009] Step 4: The antenna of the navigation terminal under test is installed on a test turntable in a microwave anechoic chamber. The device is powered on and receives the navigation signal broadcast by the navigation signal simulator, the narrowband / broadband interference signal broadcast by the interference signal simulator, the test turntable simulates the change in pitch angle when the navigation terminal under test moves, and reports the positioning / short message communication information to the test evaluation software.

[0010] In step 5, the test evaluation software receives the positioning / short message communication information reported by the navigation terminal under test, and the inbound signal processing equipment receives the inbound telegram information transmitted by the navigation terminal under test, and compares them with the short message information set in the comprehensive performance test scenario of the navigation terminal to realize the evaluation of the comprehensive performance of the navigation terminal.

[0011] Furthermore, the navigation terminal comprehensive performance test platform in step 1 includes test evaluation equipment, a navigation signal simulator, an interference signal simulator, an inbound signal processing device, a microwave darkroom, a test turntable, and the navigation terminal under test;

[0012] The navigation simulator is used to simulate the satellite navigation signal received by the navigation terminal in an actual sky-pointing situation;

[0013] The interference signal simulator is used to simulate the interference signal received by the navigation terminal in actual application;

[0014] The inbound signal processing device is used to capture, track, demodulate, decode and obtain observation quantities of short message signals transmitted by the navigation terminal under test, and package the relevant information to the test and evaluation device;

[0015] The microwave darkroom provides a clean electromagnetic environment for the navigation terminal under test, and a test antenna is installed inside for transmitting navigation signals, receiving inbound signals, and transmitting interference signals;

[0016] The test turntable is used to install the antenna of the navigation terminal under test and simulate the changes in the azimuth and elevation angles of the navigation terminal antenna during actual application of the navigation terminal under test;

[0017] The navigation terminal under test refers to a receiver that receives navigation signals from Beidou or other navigation systems and has positioning or short message communication functions;

[0018] The test and evaluation equipment is used to control the navigation signal simulator, interference signal simulator, inbound signal processing equipment, test turntable, and navigation terminal under test, as well as to collect test data, and to achieve comprehensive performance evaluation of the navigation terminal under test through analysis.

[0019] The test and evaluation equipment controls the navigation signal simulator, the interference signal simulator and the test turntable to realize the broadcast of the navigation terminal comprehensive performance test scenario, and the inbound signal processing equipment receives the inbound signal transmitted by the navigation terminal under test; the antenna of the navigation terminal under test is installed on the test turntable in the microwave darkroom, the equipment is powered on, receives the navigation signal broadcast by the navigation signal simulator, the narrowband / wideband interference signal broadcast by the interference signal simulator, and the test turntable simulates the change of the pitch angle of the navigation terminal under test during movement, and reports the positioning / short message communication information to the test and evaluation equipment; the test and evaluation equipment receives the positioning / short message communication information reported by the navigation terminal under test, and the inbound signal processing equipment receives the inbound telegram information transmitted by the navigation terminal under test, and compares them with the information set in the navigation terminal comprehensive performance test scenario to realize the evaluation of the comprehensive performance of the navigation terminal.

[0020] Furthermore, the process of constructing the navigation terminal comprehensive performance test scenario in step 2 is as follows:

[0021] Step 1: Determine the type of navigation terminal to be tested and analyze various scenarios that this type of terminal may encounter in actual use;

[0022] Step 2: determining the stress parameters of the navigation terminal under test in various scenarios;

[0023] Step 3: Build a comprehensive test scenario for the navigation terminal, covering various scenarios encountered in the actual use of this type of navigation terminal, including terminal power on, signal blockage, narrowband / wideband interference, rain attenuation, and terminal power off.

[0024] Furthermore, the test and evaluation equipment receives the positioning and speed information reported by the navigation terminal under test, and compares it with the positioning information set in the comprehensive performance test scenario, to complete the evaluation of the RNSS-related performance of the navigation terminal under test; the test and evaluation equipment receives the short message communication information reported by the navigation terminal under test, and the inbound signal processing equipment receives the inbound telegram information transmitted by the navigation terminal under test, and compares it with the short message information set in the comprehensive performance test scenario, to complete the evaluation of the short message-related performance of the navigation terminal under test; the test and evaluation equipment realizes the evaluation of the comprehensive performance of the navigation terminal through the evaluation results of the RNSS and short message-related performance of the navigation terminal under test, combined with the stress parameters set in the comprehensive test scenario.

[0025] The technology of the present invention has the following advantages:

[0026] Based on the actual application scenarios of navigation terminals, this invention simulates the actual operating conditions and environment of navigation terminals in a microwave darkroom to achieve comprehensive performance testing and evaluation of navigation terminals. By simulating actual operating conditions during the test process, the test and evaluation equipment no longer interacts with the tested navigation terminal through unnecessary commands, making the tested navigation terminal "unaware" of the test. Furthermore, the comprehensive test scenario formed by multiple application scenarios simulates the scenarios that the tested terminal may encounter in actual applications. The test results are closer to actual applications and have good practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the navigation terminal comprehensive performance test platform.

[0028] Figure 2 It is a schematic diagram of the comprehensive test scenario constructed by the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to specific embodiments and accompanying drawings:

[0030] Reference Figure 1 and Figure 2 First, a comprehensive performance test platform for navigation terminals based on a microwave anechoic chamber is constructed, which includes: test evaluation equipment, navigation signal simulator, interference signal simulator, inbound signal processing equipment, microwave anechoic chamber (including test antenna), test turntable, and the navigation terminal under test; the functions implemented by each component are as follows

[0031] Test and evaluation equipment: mainly composed of a test and evaluation computer and supporting network data exchange equipment, as well as test and evaluation software deployed on the computer. It is used to control the navigation signal simulator, interference signal simulator, inbound signal processing equipment, test turntable, and the navigation terminal under test, and to collect test data, ultimately achieving a comprehensive performance evaluation of the navigation terminal under test.

[0032] Navigation signal simulator: used to simulate the satellite navigation signals received by the navigation terminal in actual sky conditions, including the RDSS outbound signal frequency;

[0033] Interference signal simulator: used to simulate the intentional or unintentional interference signals received by the navigation terminal in actual applications, including narrowband interference and suppression interference;

[0034] Inbound signal processing equipment: It has the functions of capturing, tracking, demodulating, decoding and obtaining observation quantities of short message signals transmitted by the navigation terminal under test, and packaging the relevant information to the test and evaluation equipment.

[0035] Microwave anechoic chamber (including test antenna): used to provide a clean electromagnetic space for the terminal under test. The test antenna installed inside is used to transmit navigation signals, receive inbound signals, and transmit interference signals.

[0036] Test turntable: used to install the antenna of the navigation terminal under test and simulate the changes in the azimuth and elevation angles of the navigation terminal antenna during actual application;

[0037] The navigation terminal under test: A navigation terminal with Beidou command function, which can realize the general functions of a command machine such as receiving subordinate users, must also support the editing of special fields of inbound telegrams and have the ability to output the initial phase parameters of the inbound spread spectrum signal.

[0038] Then, a comprehensive performance test scenario for the navigation terminal is constructed. This test scenario covers various possible scenarios in actual use of the navigation terminal, including navigation terminal power on, signal obstruction, narrowband / wideband interference, rain attenuation, and navigation terminal power off. The process of constructing the comprehensive performance test scenario for the navigation terminal is as follows:

[0039] Step 1. Determine the type of navigation terminal to be tested and analyze various scenarios that may be encountered by this type of navigation terminal in actual use. Taking the vehicle-mounted navigation terminal as an example, the scenarios in actual use generally include the navigation terminal starting up to search for navigation signals to achieve initial positioning, the positioning performance and short message communication performance of the navigation terminal under signal obstruction conditions caused by passing through a road with trees in summer, the positioning performance and short message communication performance of the navigation terminal under unintentional narrowband / wideband interference, the recapture of the navigation signal after loss of lock caused by the navigation terminal passing through a tunnel, the positioning performance and short message communication performance of the navigation terminal under conditions of navigation signal power fading in rainy and snowy weather, and the navigation terminal device being shut down.

[0040] Step 2: Determine the stress parameters of the navigation terminal in various application scenarios; for example, the navigation signal attenuation value and duration under signal blocking conditions, the frequency / type / intensity / duration of the interference signal, the navigation signal loss time, the signal attenuation value / duration under rainy and snowy weather conditions, etc.

[0041] Step 3: Build a comprehensive test scenario for the navigation terminal, covering various scenarios encountered in the actual use of this type of navigation terminal, including terminal power on, signal blockage, narrowband / wideband interference, rain attenuation, terminal power off, etc.

[0042] After the test platform and test scenario are built, the test evaluation equipment controls the navigation signal simulator, interference signal simulator, and test turntable to broadcast the navigation terminal comprehensive performance test scenario, and the inbound signal processing equipment receives the inbound signal transmitted by the terminal under test;

[0043] The antenna of the navigation terminal under test is installed on a test turntable in a microwave darkroom. The equipment is powered on and receives the navigation signal broadcast by the navigation signal simulator and the narrowband / broadband interference signal broadcast by the interference signal simulator. The test turntable simulates the changes in the pitch angle of the navigation terminal under test during its movement and reports the positioning / short message communication information to the test and evaluation equipment.

[0044] The test and evaluation equipment receives the positioning, speed measurement / short message communication information reported by the navigation terminal under test, and the inbound signal processing equipment receives the inbound telegram information transmitted by the navigation terminal under test, and compares them with the information set in the comprehensive performance test scenario of the navigation terminal to realize the evaluation of the comprehensive performance of the navigation terminal.

[0045] The comprehensive evaluation of the test and evaluation equipment is as follows:

[0046] Step 101: The test and evaluation equipment receives the positioning information reported by the navigation terminal under test, compares it with the positioning information set in the comprehensive test scenario, and completes the evaluation of the RNSS-related performance of the navigation terminal under test; completes the evaluation of the first positioning time performance of the navigation terminal under test when the terminal is powered on; completes the evaluation of the RDSS loss and recapture performance of the navigation terminal under test under signal obstruction conditions; completes the evaluation of the anti-interference performance of the terminal under test under narrowband / wideband interference conditions; and completes the evaluation of the tracking sensitivity performance of the terminal under test under rain attenuation conditions;

[0047] In step 102, the test evaluation equipment receives the short message communication information reported by the navigation terminal under test, and the inbound signal processing equipment receives the inbound telegram information transmitted by the navigation terminal under test, and compares them with the short message information set in the comprehensive test scenario to complete the evaluation of the short message related performance of the navigation terminal under test; completes the evaluation of the first capture performance of the navigation terminal under test and the terminal power-on reporting function when the terminal is powered on, completes the evaluation of the RDSS loss and recapture performance of the navigation terminal under test under signal blocking conditions, completes the evaluation of the communication success rate of the terminal under test under narrowband / wideband interference and rain attenuation conditions, and completes the evaluation of the power-off reporting function of the terminal under test when the equipment is powered off.

[0048] In step 103, the test evaluation device evaluates the comprehensive performance of the navigation terminal by combining the evaluation results of the RNSS and short message related performance of the navigation terminal under test with the stress parameters set in the comprehensive test scenario and the performance index requirements of the navigation terminal under test itself.

Claims

1. A method for comprehensive performance testing and evaluation of a navigation terminal based on a microwave darkroom, characterized in that: The specific steps include: Step 1: Build a comprehensive performance test platform for navigation terminals based on a microwave anechoic chamber; Step 2: Build a comprehensive performance test scenario for the navigation terminal. The test scenario covers various scenarios that the navigation terminal may encounter in actual use. Step 3: The test evaluation software broadcasts the navigation terminal comprehensive performance test scenario by controlling the navigation signal simulator, the interference signal simulator, and the test turntable. The inbound signal processing device receives the inbound signal transmitted by the terminal under test. Step 4: The antenna of the navigation terminal under test is installed on a test turntable in a microwave anechoic chamber. The device is powered on and receives the navigation signal broadcast by the navigation signal simulator, the narrowband / broadband interference signal broadcast by the interference signal simulator, the test turntable simulates the change in pitch angle when the navigation terminal under test moves, and reports the positioning / short message communication information to the test evaluation software. Step 5: The test evaluation software receives the positioning / short message communication information reported by the navigation terminal under test, and the inbound signal processing device receives the inbound message information transmitted by the navigation terminal under test, and compares them with the short message information set in the navigation terminal comprehensive performance test scenario to evaluate the comprehensive performance of the navigation terminal. The navigation terminal comprehensive performance test platform in step 1 includes test evaluation equipment, navigation signal simulator, interference signal simulator, inbound signal processing equipment, microwave darkroom, test turntable and the navigation terminal under test; The navigation signal simulator is used to simulate the satellite navigation signal received by the navigation terminal in an actual sky-pointing situation; The interference signal simulator is used to simulate the interference signal received by the navigation terminal in actual application; The inbound signal processing device is used to capture, track, demodulate, decode and obtain observation quantities of short message signals transmitted by the navigation terminal under test, and package the relevant information to the test and evaluation device; The microwave darkroom provides a clean electromagnetic environment for the navigation terminal under test, and a test antenna is installed inside for transmitting navigation signals, receiving inbound signals, and transmitting interference signals; The test turntable is used to install the antenna of the navigation terminal under test and simulate the changes in the azimuth and elevation angles of the navigation terminal antenna during actual application of the navigation terminal under test; The navigation terminal under test refers to a receiver that receives navigation signals from Beidou or other navigation systems and has positioning or short message communication functions; The test and evaluation equipment is used to control the navigation signal simulator, interference signal simulator, inbound signal processing equipment, test turntable, and navigation terminal under test, as well as to collect test data, and to achieve comprehensive performance evaluation of the navigation terminal under test through analysis.

2. The method for comprehensive performance testing and evaluation of a navigation terminal based on a microwave darkroom according to claim 1, characterized in that: The test and evaluation equipment broadcasts the navigation terminal comprehensive performance test scenario by controlling the navigation signal simulator, interference signal simulator, and test turntable. The inbound signal processing equipment receives the inbound signal transmitted by the navigation terminal under test. The antenna of the navigation terminal under test is installed on the test turntable in the microwave darkroom. The equipment is powered on and receives the navigation signal broadcast by the navigation signal simulator, the narrowband / wideband interference signal broadcast by the interference signal simulator, and the test turntable simulates the change of the pitch angle of the navigation terminal under test during movement, and reports the positioning / short message communication information to the test evaluation equipment; the test evaluation equipment receives the positioning / short message communication information reported by the navigation terminal under test, and the inbound signal processing equipment receives the inbound telegram information transmitted by the navigation terminal under test, and compares them with the information set in the comprehensive performance test scenario of the navigation terminal to realize the evaluation of the comprehensive performance of the navigation terminal.

3. The method for comprehensive performance testing and evaluation of a navigation terminal based on a microwave darkroom according to claim 1, characterized in that: The process of building the navigation terminal comprehensive performance test scenario in step 2 is as follows: Step 1: Determine the type of navigation terminal to be tested and analyze various scenarios that this type of terminal may encounter in actual use; Step 2: determining the stress parameters of the navigation terminal under test in various scenarios; Step 3: Build a comprehensive test scenario for the navigation terminal, covering various scenarios encountered in the actual use of this type of navigation terminal, including terminal power on, signal blockage, narrowband / wideband interference, rain attenuation, and terminal power off.

4. The method for comprehensive performance testing and evaluation of a navigation terminal based on a microwave darkroom according to claim 1, characterized in that: The test and evaluation equipment receives the positioning and speed information reported by the navigation terminal under test, compares it with the positioning information set in the comprehensive performance test scenario, and completes the evaluation of the RNSS-related performance of the navigation terminal under test; the test and evaluation equipment receives the short message communication information reported by the navigation terminal under test, and the inbound signal processing equipment receives the inbound telegram information transmitted by the navigation terminal under test, compares it with the short message information set in the comprehensive performance test scenario, and completes the evaluation of the short message-related performance of the navigation terminal under test; the test and evaluation equipment realizes the evaluation of the comprehensive performance of the navigation terminal through the evaluation results of the RNSS and short message-related performance of the navigation terminal under test, combined with the stress parameters set in the comprehensive test scenario.

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