| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a channelized receiver for reducing computation processing and computation time on undesired signals, by removing the undesired signals and performing computation only on signals required for frequency computation and pulse analysis on reception signals. <P>SOLUTION: The channelized receiver is provided with a plurality of undesired signal removing circuits 4 and a passage signal level setting circuit 7. The plurality of undesired signal removing circuits 4 are provided between a plurality of A/D converters 3 and a frequency computer 5 for removing digital signals which do not satisfy a passage signal level among digital signals each converted by the plurality of A/D converters 3. The passage signal level setting circuit 7 is constituted of: a log amplifier 7a for performing wide-band detection on reception waves; an A/D converter 7b for performing analog-to-digital conversion on wide-band detection signals; a maximum level detector 7c for determining the maximum signal level of converted digital signals; and a passage level computer 7d for setting the passage signal level acquired by subtracting a level difference, a previously set fixed value, from the maximum signal level, and supplying it for the plurality of undesired signal removing circuits 4. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
