摘要 |
<p>Channel quality estimating section 104 estimates the channel quality from the reception signal quality and outputs the result to transmission method determining section 105 and control signal dividing section 108. Transmission method determining section 105 determines a transmission method of a signal transmitted to communication partner from channel conditions and outputs the result to switch 106, switch 107 and control signal dividing section 108. Control signal dividing section 108 divides the transmission method information into high-speed control signal which is transmitted periodically and low-speed control signal which is transmitted on demand rather than periodically. Moreover, control signal dividing section 108 determines the combinations of low-speed control signal and high-speed control signal outputted from a tendency of communication quality, and outputs the result to modulator 114. Modulator 114 modulates the high-speed control signal and low-speed control signal, and outputs the result to multiplexer 115. <IMAGE></p> |