| 摘要 |
PURPOSE:To realize a 1-frequency repeater system with excellent frequency utilizing efficiency by excluding the interference between transmission and reception from a transmission part to a reception port. CONSTITUTION:The one-frequency repeater consists of a transmitter 4, a receiver 5, antennas 8, 9, a frequency shifter 1, a multiplier 2 and a subtractor 3. In this case, subtractor 3 subtracts an output of the multiplier 2 being multiplication of -alpha with an output of the frequency shifter 1 from the sum between the interference between transmission and reception and a normal reception signal in order to eliminate the interference corresponding to the quantity alphaof interference between transmission and reception. Thus, the interference between transmission and reception is eliminated completely from the signal inputted to the receiver 5. |
