| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To receive a frequency hopping wave at each hopping frequency with a high gain. <P>SOLUTION: The frequency hopping wave receiving apparatus comprises: a frequency conversion section 2 for converting a signal received from an array antenna section 1 into an IF signal; a digital conversion section 3 for applying digital conversion to each IF signal; a plurality of digital reception processing sections 41 to 4N for detecting a signal for each hopping frequency; and a signal switching unit 50 for switching an output signal of each digital reception processing section and providing an output of the switched signal. Each of the digital reception processing sections 41 to 4N includes: a signal extracting section 60 for extracting a hopping frequency component from the digital IF signal; an arrival azimuth detection section 61 for detecting an arrival azimuth of the frequency hopping wave on the basis of the extracted signal; and a digital beam forming section 62 for forming a beam in the arrival azimuth detected by the extracted signal. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
