A method for testing and evaluating performance of a Beidou navigation terminal

Abstract

The application aims at the problem of non-public signal receiving branch of Beidou navigation equipment under actual sky condition and performance test and evaluation after installation on each application platform, designs a kind of Beidou navigation terminal performance real star test and evaluation method, can test and evaluate the performance of Beidou navigation terminal under real star installation condition, mainly applied in satellite navigation field.The application constructs Beidou navigation terminal performance test platform based on real star condition, realizes the test and evaluation of the function and performance of Beidou navigation terminal by using Beidou navigation system.The application is based on the real receiving constellation of Beidou navigation terminal, and the performance test and evaluation of non-public signal receiving branch, compared with the test and verification based on microwave darkroom condition, has the characteristics of test result close to actual application scene, simple system construction and convenient pre-out test, and has good practical application value.

Description

Technical Field

[0001] This invention is mainly applied in the field of satellite navigation, and in particular relates to a performance testing and evaluation method for BeiDou navigation terminals under real satellite conditions. Background Technology

[0002] The BeiDou Navigation Satellite System is a global satellite navigation system independently constructed and operated by my country and compatible with other global satellite navigation systems. It is an important national spatiotemporal infrastructure that aims to provide global users with all-weather, all-round, high-precision positioning, navigation, and timing services with a view to national security and economic and social development.

[0003] With the development of the BeiDou satellite navigation system, BeiDou navigation terminals have been widely used in various branches of the military. Traditional navigation terminal testing is basically based on navigation signal simulation testing and evaluation in an anechoic environment, lacking testing and evaluation methods for the performance of navigation terminals under actual satellite conditions, especially the lack of non-public signal receiving branches of BeiDou navigation terminals and performance evaluation methods after installation on various application platforms. Therefore, it is necessary to test and evaluate the performance of BeiDou navigation terminals under actual satellite and installation conditions to ensure that navigation terminals can meet the requirements of actual application scenarios. Summary of the Invention

[0004] This invention addresses the performance testing and evaluation of non-public signal receiving branches of BeiDou navigation terminals under actual satellite-to-space conditions and their installation on various application platforms. It designs a real-world satellite-based performance testing and evaluation method for BeiDou navigation terminals, enabling performance testing under actual satellite and installation conditions. Based on the actual satellite constellation reception of navigation terminals and focusing on the performance testing and evaluation of non-public signal branches, this invention, compared to testing and verification under anechoic chamber conditions, offers advantages such as test results closely reflecting real-world application scenarios, a simpler system construction facilitating front-end testing, and significant practical application value.

[0005] The technical solution adopted in this invention is as follows:

[0006] A method for real-satellite performance testing and evaluation of BeiDou navigation terminals includes the following steps:

[0007] (1) Construct a navigation terminal performance testing platform based on real satellite conditions, including: test evaluation software, Beidou dedicated command machine, inbound signal processing equipment and the Beidou navigation terminal under test;

[0008] (2) The tested Beidou navigation terminal is registered as a subordinate user of the Beidou dedicated command machine, or the tested Beidou navigation terminal is organized into a group of members of the Beidou dedicated command machine, with the Beidou dedicated command machine being the group leader;

[0009] (3) The test evaluation software reads the reception information of the Beidou dedicated command machine and the Beidou navigation terminal under test, and evaluates the reception performance of the navigation terminal under test.

[0010] (4) The test evaluation software controls the Beidou navigation terminal under test to send inbound short message communication to the Beidou dedicated command machine. The Beidou dedicated command machine receives the outbound short message communication forwarded by the Beidou system and processes it through the inbound signal receiving equipment to evaluate the transmission performance of the Beidou navigation terminal under test.

[0011] Furthermore, the specific process of step (3) is as follows:

[0012] (301) The test evaluation software reads the reception information of the Beidou dedicated command machine and the navigation terminal under test under real satellite conditions, including the number of visible satellites, the received signal-to-noise ratio and positioning information, and compares them to evaluate the navigation signal reception performance of the navigation terminal under test.

[0013] (302) The test evaluation software controls the Beidou dedicated command machine to send inbound short message communication information to the navigation terminal under test. The Beidou navigation terminal under test and the Beidou dedicated command machine receive the outbound short message communication forwarded through the Beidou system and perform statistical analysis to evaluate the Beidou short message reception performance of the navigation terminal under test.

[0014] Furthermore, the specific process of step (4) is as follows:

[0015] (401) The test evaluation software controls the Beidou navigation terminal under test to send inbound short message communication to the Beidou dedicated command machine, and the Beidou dedicated command machine receives outbound short message communication forwarded by the Beidou system.

[0016] (402) The inbound signal processing equipment receives the initial phase parameter information of the inbound spread spectrum signal sent by the Beidou dedicated command machine, captures the inbound short message communication signal transmitted by the Beidou navigation terminal under test, demodulates the inbound information, and obtains the observation information of the inbound information, including power, frequency offset and transmission frequency.

[0017] (403) The test evaluation software integrates the outbound short message communication received by the Beidou dedicated command machine through the Beidou system and the observation information of the inbound short message communication obtained by the inbound signal processing equipment to evaluate the transmission performance of the navigation terminal under test.

[0018] The present invention has the following advantages:

[0019] This invention, based on the actual satellite constellation reception conditions of navigation terminals and the performance evaluation of non-public signal receiving branches of BeiDou navigation terminals, offers advantages over testing and verification under anechoic chamber conditions. The test results are closer to real-world application scenarios and better reflect the equipment's performance under actual usage conditions. Furthermore, the navigation terminal performance testing platform built based on this invention under real-satellite conditions is characterized by low cost, ease of equipment deployment, simple system composition, high portability, and ease of deployment, making it highly valuable for widespread application. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the test platform constructed by the Beidou navigation terminal performance real-satellite test evaluation method of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings:

[0022] A method for real-satellite performance testing and evaluation of BeiDou navigation terminals includes the following steps:

[0023] (1) Construct a navigation terminal performance testing platform based on real-world satellite conditions, such as... Figure 1 The equipment shown includes: testing and evaluation software, a dedicated BeiDou command machine, inbound signal processing equipment, and the BeiDou navigation terminal under test.

[0024] Test and evaluation software: It includes a test and evaluation computer and supporting network data exchange equipment, which is used to control the Beidou dedicated command machine, the inbound signal processing equipment, and the Beidou navigation terminal under test, as well as to collect test data, and finally to evaluate the performance of the Beidou navigation terminal under test.

[0025] Beidou Dedicated Command Terminal: A navigation terminal with Beidou command function. In addition to the general functions of command terminals such as receiving messages from subordinate users, it also needs to support the editing of special fields for incoming messages and have the ability to output parameters such as the initial phase of the incoming spread spectrum signal.

[0026] Inbound signal processing equipment: Based on the initial phase and other parameter information of the inbound spread spectrum signal sent by the Beidou dedicated command unit, it realizes the acquisition, tracking, demodulation, decoding and acquisition of observations of the inbound signal, and packages the relevant information and sends it to the test and evaluation software.

[0027] The BeiDou navigation terminal under test is capable of being controlled by the testing and evaluation software and outputting relevant observation information.

[0028] (2) The Beidou navigation terminal under test is registered as a subordinate user of the Beidou dedicated command machine, or the Beidou navigation terminal under test is grouped as a member of the Beidou dedicated command machine (where the Beidou dedicated command machine is the group leader). At this time, the Beidou dedicated command machine can also receive the outbound short message communication information of the Beidou navigation terminal under test.

[0029] (3) The test evaluation software evaluates the reception performance of the tested navigation terminal by reading the reception information of the Beidou dedicated command machine and the Beidou navigation terminal under test.

[0030] (301) The test evaluation software reads the reception information of the Beidou dedicated command machine and the navigation terminal under test under real satellite conditions, including the number of visible satellites, the received signal-to-noise ratio, positioning information, etc., and compares them to evaluate the navigation signal reception performance of the navigation terminal under test.

[0031] (302) The test evaluation software controls the Beidou dedicated command machine to send inbound short message communication information to the navigation terminal under test. The Beidou navigation terminal under test and the Beidou dedicated command machine receive the outbound short message communication forwarded through the Beidou system and perform statistical analysis to evaluate the Beidou short message reception performance of the navigation terminal under test.

[0032] At this time, since the BeiDou navigation terminal under test and the dedicated BeiDou command machine are in the same area, the observation information received by the two should be basically the same; at the same time, the BeiDou short message communication information received by the two from the BeiDou navigation terminal under test should be the same.

[0033] (4) The test evaluation software controls the Beidou navigation terminal under test to send inbound short message communication to the Beidou dedicated command machine. The Beidou dedicated command machine receives the outbound short message communication forwarded by the Beidou system and processes it through the inbound signal receiving equipment to evaluate the transmission performance of the Beidou navigation terminal under test.

[0034] (401) The test evaluation software controls the Beidou navigation terminal under test to send inbound short message communication to the Beidou dedicated command machine, and the Beidou dedicated command machine receives outbound short message communication forwarded by the Beidou system.

[0035] (402) The inbound signal processing equipment receives the initial phase parameter information of the inbound spread spectrum signal sent by the Beidou dedicated command machine, captures the inbound short message communication transmitted by the Beidou navigation terminal under test, demodulates the inbound information, and obtains the observation information of the inbound information, including power, frequency offset and transmission frequency.

[0036] (403) The test evaluation software integrates the outbound short message communication received by the Beidou dedicated command machine through the Beidou system and the observation information of the inbound short message communication obtained by the inbound signal processing equipment to evaluate the transmission performance of the navigation terminal under test.

Claims

1. A method for real-satellite performance testing and evaluation of BeiDou navigation terminals, characterized in that, Includes the following steps: (1) Construct a navigation terminal performance testing platform based on real satellite conditions, including: test evaluation software, Beidou dedicated command machine, inbound signal processing equipment and the Beidou navigation terminal under test; (2) The tested Beidou navigation terminal is registered as a subordinate user of the Beidou dedicated command machine, or the tested Beidou navigation terminal is organized into a group of members of the Beidou dedicated command machine, with the Beidou dedicated command machine being the group leader; (3) The test evaluation software reads the reception information of the Beidou dedicated command machine and the Beidou navigation terminal under test, and evaluates the reception performance of the navigation terminal under test; (4) The test evaluation software controls the Beidou navigation terminal under test to send inbound short message communication to the Beidou dedicated command machine. The Beidou dedicated command machine receives the outbound short message communication forwarded by the Beidou system and performs reception processing through the inbound signal receiving equipment to evaluate the transmission performance of the Beidou navigation terminal under test. The specific process of step (3) is as follows: (301) The test evaluation software reads the reception information of the Beidou dedicated command machine and the navigation terminal under test under real satellite conditions, including the number of visible satellites, the received signal-to-noise ratio and positioning information, and compares them to evaluate the navigation signal reception performance of the navigation terminal under test. (302) The test evaluation software controls the Beidou dedicated command machine to send inbound short message communication information to the navigation terminal under test. The Beidou navigation terminal under test and the Beidou dedicated command machine receive the outbound short message communication forwarded through the Beidou system and perform statistical analysis to evaluate the Beidou short message reception performance of the navigation terminal under test. The specific process of step (4) is as follows: (401) The test evaluation software controls the Beidou navigation terminal under test to send inbound short message communication to the Beidou dedicated command machine, and the Beidou dedicated command machine receives the outbound short message communication forwarded by the Beidou system; (402) The inbound signal processing equipment receives the initial phase parameter information of the inbound spread spectrum signal sent by the Beidou dedicated command machine, captures the inbound short message communication signal transmitted by the Beidou navigation terminal under test, demodulates the inbound information, and obtains the observation information of the inbound information, including power, frequency offset and transmission frequency. (403) The test evaluation software integrates the outbound short message communication received by the Beidou dedicated command machine through the Beidou system and the observation information of the inbound short message communication obtained by the inbound signal processing equipment to evaluate the transmission performance of the navigation terminal under test.

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