| 摘要 |
PURPOSE:To increase communication circuits and also to make interception extremely hard by setting a carrier frequency at a transmission side by a complete noise code. CONSTITUTION:The modulated wave of signal generating source 15 is divided into infinite sections by timing signal generator 16. Then, signal generator 18 generates a signal indicating the frequency of a carrier, carrier frequency in infinite sections time-compressed by time compressor 17 are indicated by mixer 19, and carrier frequencies indicated by synthesizer 20 are generated and sent to transmitting antenna 13 via modulator 21 and high-frequency amplifier 22. |
