Telefonaktiebolaget Lm Ericsson (publ)

Zhiyi Zong

Huaisong Zhu

Shaowei Yu

Chunhui Liu

Yang Tian

Jingye Li

Zhitao Liu

A method and a base station are disclosed for multi-user multiple input multiple output (MU-MIMO). According to an embodiment, a base station obtains historical scheduling characteristic information. The base station reserves resources for MU-MIMO users based at least on the historical scheduling characteristic information. The base station allocates the reserved resources to the MU-MIMO users.

Method and base station for multi-user multiple input multiple output

The present disclosure provides a method and an apparatus in a radio base station for inter-transceiver antenna calibration. The method comprises collecting a first phase difference between a first signal and a first reception signal and a second phase difference between a second signal and a second reception signal. The first signal is transmitted through a reference transmission path of a first transceiver and received through a reference reception path of a second transceiver as the first reception signal. The second signal is transmitted through a reference transmission path of the second transceiver and received through a reference reception path of the first transceiver as the second reception signal. The method further comprises determining and compensating for an inter-loop phase response difference between a first reference path loop of the first transceiver and a second reference path loop of the second transceiver by subtracting the second phase difference from the first phase difference. The first reference path loop consists of the reference transmission path and the reference reception path of the first transceiver, and the second reference path loop consists of the reference transmission path and the reference reception path of the second transceiver.

Methods and apparatus for antenna calibration

The present disclosure provides a method in a base station of a radio network for antenna calibration of a first transceiver of the base station with respect to a second transceiver. The method comprises at least one of a first group and a second group of steps. The first group of steps comprises collecting a first group of amplitude and phase differences between a first calibration signal and each of a first and a fourth reception signals and between a second calibration signal and each of a second and a third reception signals. The first group of steps further comprises estimating, based on the first group of amplitude and phase differences, a signal response characteristic difference between a calibration reception chain of the first transceiver and a calibration reception chain of the second transceiver for reference antenna reception calibration of the first transceiver with respect to the second transceiver.

Growing community of inventors

Beijing, China

Zhiyi Zong