Patent ID: 8385455
Filing Date: 2013-02-26
Classification: H04B

Abstract:
1. A multi-antenna wireless communication method in which a plurality of antennas for transmission and a plurality of antennas for reception are used and in which wireless communication is performed with MIMO (Multiple Input Multiple Output) technology, the multi-antenna wireless communication method comprising: a first step of determining diversity combining information with respect to each signal of the plurality of antennas that optimizes a diversity reception state as a value optimum thereof in each wireless communication device through two-way training signal transfer between the wireless communication devices that perform transmission and reception; a second step of setting the value optimum of each diversity combining information determined by the first step for each wireless communication device; and a third step of enabling each wireless communication device to perform beamforming and diversity combining for a time of data transmission/reception in a state in which the value optimum of each diversity combining information has been set by the second step; wherein in the first step, in each diversity reception in a plurality of times two-way training signal transfer, diversity combining information that optimizes a diversity reception state is obtained based on training reception information showing a receiving state of a diversity-combining received signal, thereafter diversity combining information is updated by the resulting diversity combining information after diversity reception, thereafter the diversity combining information updated thereby is set, and a training signal is transmitted, thereby determining a set of vectors asymptotically approaching to a set of eigenvectors with respect to a maximum eigenvalue of a correlation matrix of a channel matrix in a transfer between a couple of wireless communication devices that perform transmission and reception as the value optimum of diversity combining information with respect to the couple of wireless communication devices.