Downlink transmission in a multiple-user multiple-input multiple-output (“MU-MIMO”) wireless communication system

US8406332B2 · kind B2 · utility

Assignee

• RESEARCH IN MOTION LIMITED · CA

Inventors

• Alireza Bayesteh · Ottawa, CA
• Amin Mobasher · Waterloo, CA
• Hua Xu · 安丰镇, CN
• Yongkang Jia · Ottawa, CA
• Yi Yu · Irving, US
• Jack Anthony Smith · Garner, US
• Zhijun Cai · Ashburn, US
• Shiwei Gao · Honey Gables, CA

Key dates

• Filing date: Jan 18, 2010
• Grant date: Mar 26, 2013
• Expiry date: Feb 18, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B7/0641
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Information transmission in a multiple-input multiple-output (“MIMO”) wireless communication system is provided. In one embodiment, a method for transmitting information in a MIMO wireless communication system, comprising updating channel quality information (“CQI”) values of a plurality of wireless devices, wherein updating said CQI values consider the effects of interference from transmissions to those wireless devices associated with a pre-assigned companion codeword set; pairing said plurality of wireless devices using at least said CQI values, a precoding matrix index (“PMI”) value and said pre-assigned companion codeword set, wherein said pre-assigned companion codeword set, pre-assigned companion codewords associated with said pre-assigned companion codeword set and said PMI value are updated for each of said plurality of wireless devices; precoding the information for each of said plurality of wireless devices using said PMI value; and transmitting said precoded information to each of said plurality of wireless devices.