RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a radio communication method improving a communication speed by multi user MIMO (multiple input multiple output) even if a channel sequence indicating the state of a transmission path is not correctly acquired.

SOLUTION: The radio communication method includes a step for estimating channel information indicating the state of each of transmission paths between a plurality of radio terminal devices and a plurality of antenna elements, a step for calculating an estimated error of the estimated channel information on the basis of known signals received from the plurality of radio terminal devices, a transmission power condition determining step for calculating permissible transmission power conditions indicating an upper limit value of transmission power allocated to other radio terminal devices when data is spatially multiplexed for each of the plurality of radio communication devices on the basis of the calculated estimation error and then the multiplexed data is transmitted, a step for selecting a radio terminal device as a target of data transmission from among the plurality of radio terminal devices on the basis of the calculated permissible transmission power conditions, and a step for spatially multiplexing the data and transmitting the spatially multiplexed data to the selected radio terminal device.

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