| 摘要 |
PURPOSE:To eliminate interference between transmission and reception without decreasing a spread band width. CONSTITUTION:A spread code generator 1 generates a spread code 111 periodically. A frequency table 2 generates reception frequency information 121 corresponding to a random reception frequency synchronously with the spread code 111. A discrete frequency table 3 generates discrete frequency information 131 corresponding to a random discrete frequency synchronously with the spread code 111. An adder 4 adds the reception frequency information 121 and the discrete frequency information 131 to generate transmission frequency information 141 corresponding to the random transmission frequency parted from the reception frequency by a prescribed frequency or over. A reception local signal generator 5 generates a random reception local signal 151 by the reception frequency information 121. A transmission local signal generator 6 generates a random local signal 161 based on the transmission frequency information 141. Thus, the interference between transmission and reception is eliminated without decreasing the spread band width. |
