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

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.