| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of improving receiving quality in an LOS (Line OF Sight), a transmitter and a receiver in an MIMO (Multiple-Input Multiple-Output) system.SOLUTION: A weighting/synthesizing part 600 inputs base band signals 307A, 307B and information about a weighting method, and outputs signals 309A, 309B subjected to weighting/synthesizing. Information about weighting provides a certain period and regularly switches precoding weights. For example, four periods are provided, and precoding matrices each having the equal absolute value are switched to times 4i, 4i+1, 4i+2, 4i+3 to weight respective streams. Thus, precoding matrices following a rule suitable to an LOS environment are applied, and data reception quality can be improved.SELECTED DRAWING: Figure 6 |
