Method and system for spatial radio-frequency performance testing based on multiple-antenna system

1. A method for over the air performance testing based on a multi-antenna system, wherein the number of combined sub-paths and a sub-path mapping rule are set, and the method comprises:

a channel emulator outputting path signals to a branch device according to signals input by a base station emulator;

the branch device mapping combined sub-paths to test antennas according to the set number of the combined sub-paths and sub-path mapping rule, wherein the combining is performed by adding sub-path channel matrix elements or adding vectors; wherein a corresponding relationship between the paths and test antennas is set, the number of the combined sub-paths is three; and the sub-path mapping rule comprises: mapping sub-path signals with the strongest signal power in the sub-paths of a path to an antenna corresponding to the path, and mapping signals of the other two sub-paths to two antennas on both sides of the antenna corresponding to the path;

the test antennas transmitting spatial signals according to the path signals from the branch device; and

a device under test receiving the spatial signals, and then an over the air performance analysis and display module analyzing and displaying the over the air performance of the device under test based on the spatial signals received by the device under test.

2. The method according to claim 1 , wherein the number of the test antennas is equal to the number of paths of a channel model used by the channel emulator.

3. The method according to claim 1 , wherein mapping the path signals from the channel emulator to the test antennas comprises combining the sub-paths of the path signals according to the set number of combined sub-paths, and mapping the combined sub-paths to the test antennas according to the set sub-path mapping rule.

4. The method according to claim 1 , wherein the device under test is located in a central position of a full-anechoic absorption chamber, and the test antennas are located on a circumference centered around the device under test.

5. The method according to claim 1 , wherein the over the air performance analysis and display module is implemented by a corresponding function module in a test instrument/meter; or

the over the air performance analysis and display module is an individual device.

6. The method according to claim 2 , wherein mapping the path signals from the channel emulator to the test antennas comprises combining the sub-paths of the path signals according to the set number of combined sub-paths, and mapping the combined sub-paths to the test antennas according to the set sub-path mapping rule.

7. The method according to claim 2 , wherein the device under test is located in a central position of a full-anechoic absorption chamber, and the test antennas are located on a circumference centered around the device under test.

8. A system for over the air performance testing based on a multi-antenna system comprising: a base station emulator, a channel emulator, a branch device, a full anechoic absorption chamber, test antennas, a device under test and an over the air performance analysis and display module; wherein

the base station emulator is configured to emulate transmitting signals of a base station to output to the channel emulator;

the branch device is configured to map combined sub-paths to the test antennas according to the preset number of combined sub-paths and sub-path mapping rule, wherein the combining is performed by adding sub-path channel matrix elements or adding vectors; wherein a corresponding relationship between the paths and test antennas is set, the number of the combined sub-paths is three, and the sub-path mapping rule comprises: mapping sub-path signals with the strongest signal power in the sub-paths of a path to an antenna corresponding to the path, and mapping signals of the other two sub-paths to two antennas on both sides of the antenna corresponding to the path;

the test antennas located in the full-anechoic absorption chamber are configured to transmit spatial signals according to the path signals from the branch device;

the device under test is configured to receive the spatial signals sent by the test antennas; and

the over the air performance analysis and display module is configured to analyze and display over the air performance of the device under test according to the spatial signals received by the device under test.

9. The system according to claim 8 , wherein the number of the test antennas is equal to the number of output paths of a channel model used by the channel emulator.

10. The system according to claim 8 , wherein the branch device mapping the path signals from the channel emulator to the test antennas comprises combining the sub-paths of the path signals according to the set number of combined sub-paths, and mapping the combined sub-paths to the test antennas according to the set sub-path mapping rule.

11. The system according to claim 8 , wherein the device under test is located in a central position of a full-anechoic absorption chamber, and the test antennas are located on a circumference centered around the device under test.

12. The system according to claim 8 , wherein the over the air performance analysis and display module is implemented by a corresponding function module in a test instrument/meter; or

the over the air performance analysis and display module is an individual device.

13. The system according to claim 9 , wherein the branch device mapping the path signals from the channel emulator to the test antennas comprises combining the sub-paths of the path signals according to the set number of combined sub-paths, and mapping the combined sub-paths to the test antennas according to the set sub-path mapping rule.

14. The system according to claim 9 , wherein the device under test is located in a central position of a full-anechoic absorption chamber, and the test antennas are located on a circumference centered around the device under test.