| 摘要 |
<p>PURPOSE:To synchronize a demodulation signal by switching a transmission frequency at high speed and transmitting data on a transmission side, and switching a reception frequency in synchronizing with the switching of the transmission frequency on a reception side. CONSTITUTION:A transmitter 1 consists of a PN code clock generator 10, a PN code generator 11, a modulation part 13, a high frequency generator 14, a transmission power control part 15, a control signal generation part 16, an antenna 17, an interface part 18 and a data clock generator 19. The transmitter transmits the second modulation output part of a spectrum diffusion modulation output at low power and a first modulation output part at high power. A receiver 2 detects a first correlation demodulation output between the first correlation demodulation output part and a second correlation demodulation output part and generates a timing signal. Thus, the data demodulation signal is synchronized.</p> |
