发明申请
- 专利标题： METHOD, APPARATUS AND SYSTEM FOR FORMING TIME DIVISION DUPLEX MULTI-INPUT MULTI-OUTPUT DOWNLINK BEAMS
- 专利标题（中）： 方法，形成时分双工多输入多输出下行链路的装置和系统
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申请号： US12825065申请日： 2010-06-28
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公开(公告)号： US20100265855A1公开(公告)日： 2010-10-21
- 发明人: Luxi Yang , Daofeng Xu , Yinggang Du
- 申请人： Luxi Yang , Daofeng Xu , Yinggang Du
- 优先权： CN200710306383.5 20071228
- 主分类号： H04B7/02
- IPC分类号： H04B7/02 ; H04J3/00 ; H04L5/14
摘要：
A method, an apparatus, and a system for forming Time Division Duplex (TDD) Multi-Input Multi-Output (MIMO) downlink beams are disclosed herein. The method includes: generating a transmitting beam of a first data stream according to a Maximum Rate Transmission (MRT) criterion; and generating transmitting beams of other data streams except the first data stream, wherein the transmitting beams of other data streams are confined in a null space of the transmitting beam of the first data stream. Through the embodiments of the present invention, the Base Station obtains precise Partial Channel State Information by using only reciprocity without requiring feedback information, and thus the calculation is simplified and the rate of data streams is improved.