Interference detection and reduction.

摘要

An interference detector for an interference reducing device is provided which comprises input means 103 for receiving a digitally modulated signal; a voltage-controlled oscillator 122 for generating an oscillation frequency output; a mixer 117 for mixing the digital modulated signal with said oscillation frequency output; a multiplexer 118 for dividing the output of said mixer into a plurality of signal frequency band parts; A/D converters 19, 20 for converting said divided signals into digital voltage outputs; a CPU 124 for detecting a narrow band interference carrier included in said received digitally modulated signal by the use of said converted voltage outputs; and a D/A converter 21 for converting the output of said CPU to an analog output to control said oscillation frequency output of said voltage-controlled oscillator with the CPU output. <IMAGE>