| 摘要 |
PURPOSE:To reduce the effect of a crosstalk wave by providing a transmitter including a means synthesizing outputs of 1st and 2nd filters, and a receiver including a data comparison means comparing output levels of 3rd and 4th filters and demodulating a data to the communication equipment. CONSTITUTION:A low pass filter(LPF) 6 passes a low side band component of a spectrum of an SS signal, a high pass filter(HPF) 7 passes an upper side band component of the spectrum, a synthesizer 8 synthesizes outputs of the LPF6 and the HPF7, an amplifier 9 amplifies the result to a proper level and the result is sent to an antenna 10. Then the SS signal received by an antenna 11 is converted into an intermediate frequency whose center frequency is fIF. That is, an LPF 35 and an HPF 23 divide a spectrum of an output of a convolver 18 into upper and lower side bands to separate a correlation spike component and a spurious component. Thus, the convolver demodulates a data efficiently. Thus, the effect of a crosstalk wave is reduced by having only to use one correlation device. |
