| 摘要 |
PROBLEM TO BE SOLVED: To establish synchronization in frequency hopping(FH) in a short time by transmitting a data signal through shifting of transmission carrier wave frequency, based on an FH pattern, after a preamble signal and an FH synchronizing signal have been transmitted. SOLUTION: A switching device 5 is switched and controlled by a timing generator 1. A preamble transmission circuit 2 is connected with a data modulator 6, data modulation is performed for the preamble signal by the data modulator 6 and is transmitted with specified carrier wave frequency by a frequency shifting device 7. An FH synchronizing signal generation circuit 3 is connected with the data modulator 6, the data modulation is performed for the FH synchronizing signal and is transmitted with the specified carrier wave frequency by the frequency shifting device 7. A transmitted data output circuit 4 is connected with the data modulator 6, and the data modulation is performed for the transmitted data. The data modulation signal is transmitted by having the frequency shifting device 7 the carrier wave frequency in accordance with the FH pattern provided from the FH pattern generator 8. |
