| 摘要 |
<P>PROBLEM TO BE SOLVED: To extract a desired signal, where an interference signal is suppressed, even in a state where information of the interference signal does not exist in radio communication or where the signal band width of the interference signal differs from that of the desired signal. <P>SOLUTION: A time correlation extracting part 15 calculates the time correlation of a reception signal and extracts a component other than the time correlation component of the desired signal from the time correlation waveform of the reception signal as the time correlation waveform of the interference signal. A signal waveform reproducing part 17 divides the time correlation waveform of the interference signal by a reference signal and outputs the interference signal. A determination changeover part 18 determines whether the output signal of the signal waveform reproducing part 17 becomes not less than a prescribed level or not. When the level is less than a determination level, the reception signal is defined as the reference signal. When being not less than the prescribed level, the output signal of the reproducing part 17 is defined as the reference signal. A reproduction interference signal from the reproducing part 17 is subtracted from the reception signal by a subtracting part 23. Thus, the desired signal with interference suppressed therein is obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
