| 摘要 |
<p>PROBLEM TO BE SOLVED: To save power by reducing power consumption at the time of communication starting processing while shortening reception waiting time by making the number of hops in a hopping pattern at the time of communication starting processing lower than the number of hops in a hopping pattern at the time of communication processing. SOLUTION: Each time a hop signal is inputted, a hop table 26 outputs a spreading code (f) corresponding to the channel of a channel setting value shown by the hop signal to a PLL local oscillator and outputs the spread signals of frequencies corresponding to spreading codes f1, f2...fL...fM from a PLL local transmitter to an up converter. Then, the number of hops in the hopping pattern (channels C1, C2...CL) at the time of communication starting processing is made lower than the number of hops in the hopping pattern (channels C1, C2...CL...CM) at the time of communication processing. Since the time for one circulation in frequency hopping is shortened by reducing the number of hops at the time of communication starting processing, synchronism can be captured again in a short time so that power saving can be attained.</p> |
