| 摘要 |
PROBLEM TO BE SOLVED: To remove the discrete in-band radio frequency tone interference of a low output by inputting the differential signal of a in-phase component and a quadrature component in the digital code of input and output ends in a slicer to a tone erasing device. SOLUTION: An analog signal inputted from a conductor 11 outputs a digital sample by a timing recovering equipment 15 and an A/D converter 10. Then, it is outputted to the adaptive equalizer 25 through a spectrum characteristic reshaping filter 20. The output is mixed with a base band frequency by reference carrier from a carrier recovering equipment 35 in a mixer 30 and outputted to a tone erasing device 100. Here, the effect of a spectrum line in an interference tone is reduced by the error signal which is obtained by the difference of the in phase component and the quadrature component in the digital code of the input and the output of the slicer 40 so as to be outputted to the slicer 40. Thus, the discrete in-band radio frequency tone interference of the low output is removed. |
