| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an angle measuring device for accurately measuring angle. <P>SOLUTION: This angle measuring device includes a monopulse beam re-forming section 41 for forming a phase monopulse beam (Σ,Δ) based on a sub-array signal, a first FFT section 42 for fast-Fourier-transforming aΣbeam, a threshold extraction section 43 for extracting only signals of a filter bank exceeding a predetermined threshold from the signal from the first FFT section, calculating an average value or a center-of-gravity value of the bank numbers of the extracted signals, and outputting theΣbeam of the bank numbers, a second FFT section 44 for fast-Fourier-transforming aΔbeam, an angle measuring section 45 for measuring the angle based on theΣbeam from the threshold extraction section and theΔbeam from the second FFT section, and a radar control section 46 for commanding a directive angle when the target direction indicated by the angle measuring value obtained by the angle measurement is not the beam center direction. The monopulse beam re-forming section re-forms the phase monopulse beam where the commanded directive angle is in the beam center direction, and the angle measuring section measures the angle based on the re-formed phase monopulse beam. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
