| 摘要 |
PURPOSE:To determine the optimum transmission speed quickly, by transmitting a control signal including a demodulating speed set instruction from a transmitter to a receiver. CONSTITUTION:A training signal 1c and a control signal 2c are transmitted from a transmitter in a modulation speed Vc. This control signal 2c includes the next demodulator speed set information Vd to a receiver. When the transmitter completes the transmission of signal at a modulation speed Vc, a control signal 2e including a trainning signal 1d and a demodulator speed set instruction Ve instructed to the receiver in advance is transmitted. Similarly, a trainning signal le and a control signal 2e are transmitted with a modulator speed Ve. On the other hand, the receiver changes the demodulator speed according to the control signal and it makes receptionable the next signal. After the transmission signal from the transmitter side is finished, the receiver transmits the control signal to the transmitter. |
