| 摘要 |
PURPOSE:To cancel the leaks of demodulated codes by dividing each of a reception signal and a demodulated code into two signals different in phase by 180 deg. and adding multiplication results between signals having the same phase and between signals having opposite phases by a power synthesizer. CONSTITUTION:The multiplication result between an in-phase reception signal 7 and an in-phase demodulated code and the leak of the in-phase demodulated code 10 are outputted from a double balanced modulator 13, and the multiplication result between an anti-phase reception signal 8 and an in phase demodulated code 11 and the leak of the in-phase demodulated code 11 are outputted from a double balanced modulator 13. Consequently, if an in phase demodulating system output signal 20 and an anti-phase demodulating system output signal 21 are synthesized by a power synthesizer 22, the leak of the in-phase demodulated code 10 and that of the anti-phase demodulated code 11 are cancelled by each other because they have phases opposite to each other, and a demodulated carrier 23 as the output of the power synthesizer 22 does not include the demodulated code. |
