| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a receiver unit which does not generate much noise and can use a filter whose characteristics are moderate. <P>SOLUTION: In a receiver unit 20 designed to receive a signal which has been down-converted for digitalization by using a first frequency signal in a transmitting device, the following are included: conversion means (DAC 205) which converts a digitalized signal into an analog signal; extraction means (bandpass filter 206) which extracts an aliasing signal of a prescribed order included in the analog signal obtained by the conversion means; and restoration means (mixer 207) which up-converts the aliasing signal extracted by the extraction means by using a second frequency signal whose frequency is lower than the first frequency, to restore it to the original signal. <P>COPYRIGHT: (C)2013,JPO&INPIT |
