| 摘要 |
In a transmission antenna directivity control apparatus, a reception multi-beam generation section executes weights and combines reception signals from reception array antenna elements using a preset weight coefficient to generate reception multi-beams. A transmission weight coefficient generation section generates, in accordance with detection powers of the reception multi-beams, a transmission weight coefficient for transmission data in correspondence with each of transmission multi-beams corresponding to transmission array antenna elements. A transmission multi-beam generation section multiplies the transmission data by the transmission weight coefficient to generate the transmission multi-beams and supplies them to the corresponding transmission array antenna elements. In the transmission weight coefficient generation section, a power ratio calculation section calculates a power ratio of a maximum power of the detection powers of the reception multi-beams to an adjacent power of the maximum power beam, which exhibits a larger power beam, and a transmission weight coefficient calculation section calculates the transmission weight coefficient on the basis of the power ratio. A transmission antenna directivity control method is also disclosed.
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