Telefonaktiebolaget Lm Ericsson (publ)

Jinlai He

Ang Feng

Guangsheng Guo

Yaxin Xing

Dong Wang

Tao Huang

Nan Wang

Guozhu Li

A method for antenna calibration for an active antenna system is disclosed. According to an embodiment, test signals are generated for multiple antennas of the active antenna system. The test signals are transmitted via the multiple antennas. A first signal that results from the transmission of the test signals is received over the air. A second signal is received from a coupler network of the active antenna system. The coupler network is configured to generate coupled signals of the test signals and combine the coupled signals into the second signal. Calibration information for compensating an influence of the coupler network is determined based on the first and second signals. An active antenna system is also disclosed for use in antenna calibration.

Method for antenna calibration and active antenna system for use in antenna calibration

In one example aspect, a method is provided of preparing a symbol for transmission, the method comprising applying a window function to a symbol to generate a modified symbol, wherein a property of the window function is based on a channel length of a transmission channel over which the modified symbol is to be transmitted, and causing the modified symbol to be transmitted over the transmission channel.

Preparing a symbol for transmission

Growing community of inventors

Beijing, China

Jinlai He