| 摘要 |
<p>A decision circuit (213) of a mobile station measures the number of passes of a down line; and, if the number of passes is smaller than a threshold value, it decides that an antenna switching operation must be performed, and otherwise decides that an antenna switching operation need not be performed. A multiplexing-circuit (214) multiplexes a control signal carrying the decision result of the circuit (213) with transmission data for transmitting. A base station separates a control signal from a reception signal and determines whether or not an antenna switching operation should be performed according to the descriptions of the control signal, thereby making it possible to perform a transmission antenna switching operation only when a transmission antenna switching can improve a reception quality and to minimize a transmission antenna switching requirement.</p> |
