| 摘要 |
PURPOSE:To provide the communication system and the transmitter capable of performing stable information transmission at low cost. CONSTITUTION:In the frequency hopping spectle diffusion communication system hopping the frequency of a carrier signal for information data by the constant cycle, the hopping cycle of the frequency is performed in plural bit units of information data. The same information data are sent by plural hopping frequencies. Thus, the transmitter is provided with a secondary modulator 5, a frequency changeover switch 10 giving the hopping carrier frequency for information data by constant cycle to a modulator 5, a CPU 2 giving the same information data in word units to the modulator 5 on successive plural hopping frequencies, primary modulator 3, and transmission means which transmits the output signal of the modulator 5 as radiowave. |
