METHOD, DEVICE AND SYSTEM FOR TIME DIVISION DUPLEX MULTIPLE INPUT AND MULTIPLE OUTPUT BEAMFORMING

摘要

A method, an apparatus, and a system for forming TDD MIMO downlink beams are disclosed herein. The method includes: generating a transmitting beam of a first data stream according to an 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 BS obtains precise PCSI by using only reciprocity without requiring feedback information, and thus the calculation is simplified and the rate of data streams is improved.