| 摘要 |
PROBLEM TO BE SOLVED: To provide an interference removal device for removing interference of a digital signal to an analog signal. SOLUTION: The interference removal device includes: an A/D (Analogue/Digital) converting part 1 for performing A/D conversion in a frequency being M times (M is an integer which is 2 or more) as large as a desired output frequency; an S/P (serial/parallel) converting part 2 for distributing digital signal after the A/D conversion; an FIR (Finite Impulse Response) filter 3 in which the distributed signal at the earliest timing is input to output a signal after a filter operation in a desired output frequency; an FIR filter 4 in which the other signal is input to output the input signal in a desired output frequency by a filter operation and interpolation processing; an FF 5 for sampling an input digital signal in a frequency being M times as large as a desired output frequency; a determining part 6 for determining an FIR filter having the smaller influence of interference by the input digital signal on the basis of the result sampled by the FF 5; and a selector part 7 for selecting and outputting one among signals output by the FIR filters on the basis of the determined result. COPYRIGHT: (C)2011,JPO&INPIT
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