| 摘要 |
PURPOSE:To improve the error correcting capacity and to increase greatly the multi-address communication frequency for the frequency hopping spread spectrum communication, by using a multi-value error correction code. CONSTITUTION:The information given from a terminal 100 corresponding to an address is fed as an address of an ROM12. The information corresponding to the phase of a code is obtained by counting the signals supplied from a terminal 101, the signals supplied from a terminal 102 and the clock signals supplied from the terminal 102 by a 4-bit counter 10 and then adding these signals by an adder 11. The signal supplied from the terminal 100 and the output of the adder 11 are added together to be used to an address signal of the ROM12. The output of the ROM12 is added with the multi-value diffusion code given from the terminal 103 through an adder 13. The frequency of a frequency synthesizer 14 is hopped based on the result of addition and transmitted through a terminal 104. |
