| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem that the frequency switch timing of a transmission signal is not matched with that of a reception signal and switch noise generated when the frequency of the transmission signal is switched interferes with the data part of the reception signal. SOLUTION: A delay circuit 10 delaying a reproduced hopping clock e by time (T-Δt) by using a data clock d matches the switch timing of hopping with that of a reception signal a. Then, a delay circuit 11 delaying reception data c by (T-Δ) by using the data clock d matches the guard bit G of reception data c' with the frequency switch timing of a transmission signal b'. Here, T is the hopping period of the reception signal andΔt is time required for demodulating a reception part 2. Thus, the frequency switch timing of the transmission signal b' is matched with that of the reception signal a.</p> |
