Precoding and channel state information acquisition for multi-stream transmissions in massive MIMO systems

US10516462B2 · kind B2 · utility

Assignee

• Huawei Technologies Co., Ltd. · CN

Inventors

• Lu WU · Shanghai, CN
• Wei Han · Shanghai, CN
• Peng Shang · Shanghai, CN
• Jin Liu · Shanghai, CN
• Xiaoyan Bi · Shanghai, CN
• Shibin Ge · Shanghai, CN
• Dageng Chen · Shanghai, CN

Key dates

• Filing date: Nov 13, 2018
• Grant date: Dec 24, 2019
• Expiry date: Nov 13, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L5/0048
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A radio access node (RAN) and method of operation of the RAN are provided. The RAN includes a massive multiple-input-multiple-output (MIMO) antenna array. The RAN includes a processing hardware configured to carry out a communication method that includes receiving a digital data stream for transmission on a time-frequency resource. The RAN precodes the digital data stream using a digital beamforming stage to render a precoded digital downlink data stream for downlink data stream signal transmission to a user equipment. The digital beamforming stage includes a first precoding stage configured according to a long-term matrix, and a second precoding stage configured according to a short-term matrix. The RAN is further configured to generate a downlink data stream transmission signal to the user equipment in accordance with the precoded digital downlink data stream.