Nokia Solutions and Networks Oy

Nokia Technologies Oy

Zhijun Liao

Shenglin Shi

Liang Xing

Lijun Wang

Weiqiang Mao

Stefan Wesemann

Yaling Qu

Junjie Zeng

Youbao Luo

Leilei Li

According to embodiments of the present disclosure, downlink beamforming in MU-MIMO systems is proposed. Embodiments of the present disclosure take practical receivers into consideration, to further mitigate the interferences sensed by terminal devices. The beamforming scheme according to embodiments of the present disclosure has many advantages. For example, embodiments of the present disclosure tackle interferences from terminal device view, to mitigate the interferences which really affect the received signals of terminal devices. Embodiments of the present disclosure do not assume that terminal devices utilize Eigen receivers but consider more practical receivers used by the terminal devices to mitigate the interferences. Embodiments of the present disclosure have high flexibility, different interference cancelling methods can be used to replace the ZF method.

Downlink beamforming in MU-MIMO system

Embodiments of the present disclosure relate to methods, apparatuses and computer program products for improving resource efficiency in a wireless communication system. A method implemented at a network device comprises: setting, for a terminal device, a first number of repetitions to be used for a first transmission from the terminal device; detecting the first transmission from the terminal device based on a second number of repetition; in response to detecting the first transmission correctly based on the second number of repetitions, comparing the second number with the first number; and in response to the second number being less than the first number, identifying a resource for remaining repetitions after the second number of repetitions of the first transmission as being reusable for a further terminal device. Embodiments of the present disclosure may improve resource usage efficiency of the wireless communication system, and at the same time support coverage enhancement.

Method and apparatus for improving resource efficiency in a wireless communication system

Embodiments of the present disclosure relate to methods and apparatuses for signal detection in a MIMO communication system. A receiver device according to an embodiment of the present disclosure comprises a remote unit and a baseband unit. The remote radio unit is configured to receive a first set of signals from a first number of receiving antennas, and the baseband unit comprises: an interfacing unit, configured to obtain the first set of signals from the remote radio unit; a beamforming unit, configured to generate a second set of signals associated with a second number of virtual antennas by performing receiving beamforming for the obtained first set of signals, the second number being less than the first number; and a detecting unit, configured to detect the second set of signals generated by the beamforming unit. Embodiments of the present disclosure may reduce complexity of signal detection and cost of implementation.

Method and apparatus for signal detection in a MIMO communication system

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Zhejiang, China

Zhijun Liao