| 摘要 |
PURPOSE: An adjacent channel interference removing unit of a digital high frequency receiver is provided to remove an adjacent channel signal by feeding back a digitally converted signal. CONSTITUTION: An ADC(Analog to Digital Converter)(233) forms an output signal by converting a down-converted signal into a digital signal. A digital filter(234) passes only the adjacent channel signal among the output signals. A DAC(Digital to Analog Converter)(235) converts the passed adjacent channel signal into the analog signal. A combiner(231) combines the output signal of the DAC with the phase modulated with a communication signal and inputs the combiner to a sampler.
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