Patent ID: 8805290

Claim:
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.