Patent ID: 8605658

Claim:
A multi-antenna wireless communication method in which wireless communication is performed with MIMO (Multiple Input Multiple Output) or SIMO (Single Input Multiple Output) technology using a plurality of radios in transmitting side or in receiving side or both and in which an antenna group comprising multiple antennas is used at every transmitting/receiving circuit and each antenna group performs wireless communication with MIMO technology, the multi-antenna wireless communication method comprising: a first step of determining diversity combining information with respect to each signal of the antennas of each antenna group that optimizes a diversity reception state at each antenna group as a value optimum 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 with respect to each signal of the antennas of each antenna group determined by the first step for each wireless communication device; and a third step of enabling each wireless communication device to perform beam forming and diversity combining for a time of data transmission/reception at each antenna group 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 one or a plurality of times two-way training signal transfer, diversity combining information that optimizes a diversity reception state at each antenna group is obtained based on training reception information showing a receiving state of a diversity-combining received signal at each antenna group, 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 antenna groups of a couple of wireless communication devices that perform transmission and reception as the value optimum of diversity combining information between antenna groups of the couple of wireless communication devices.