| 摘要 |
The plurality of antennas of a base station used for transmitting diversity are divided into groups. Each antenna is located so that signals transmitted from antennas in the same group have a high fading correlation. Each antenna group is spaced so that a fading correlation between the groups may become low. Since signals transmitted from an antennas in the same group have high fading correlation, such signals suffer little from fading fluctuations and a low control speed is acceptable. However, control between the groups must be exercised at a high speed. Therefore, a mobile station that receives the signals of the base station feeds back feedback information for controlling fading fluctuations between the groups and information within a group to the base station at a high transfer rate and at a low transfer rate, respectively.
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