Clutter Suppression Filters with Cascade Connection Using Offset of Zeros for Staggered PRF Radars.
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Accession number;03A0049494
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| Title;Clutter Suppression Filters with Cascade Connection Using Offset of Zeros for Staggered PRF Radars. |
| Author;
HARASAWA YASUHIRO
(Mitsubishi Electric Corp., Information Technol. R&D Center, JPN)
SEKIGUCHI TAKASHI
(Mitsubishi Electric Corp., Information Technol. R&D Center, JPN)
KIRIMOTO TETSURO
(Mitsubishi Electric Corp., Information Technol. R&D Center, JPN)
HAMADA NOZOMU
(Keio Univ., Faculty of Sci. and Technol., JPN)
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Journal Title;IEICE Transactions on Communications (Japanese Edition)
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Journal Code:S0622C
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ISSN:1344-4697
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VOL.J86-B;NO.1;PAGE.93-103(2003)
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| Figure&Table&Reference;FIG.6, TBL.3, REF.11 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;On pulse radars for portable use, when using clutter suppression processing (CSP) such as MTI (moving target indicators) and AMTI (adaptive MTI), it was often to use staggered trigger system (STS) capable of transmitting pulses at inequal intervals so as to narrow a blind rate region. As CSP when using STS, it is general to use a time-varying coefficient filter. However, on this method, when simultaneously receiving plural clutters, for supressing them higher order of time-varying filter is necessary. As a result, operation quntities to obtain filter coefficient showing desired features increase, to make real time processing difficult. For a measure to solve this, in this paper, was proposed a method to realize a clutter supression filter by cascade connection of plural low order time-varying filters adjusting zero point frequency with zero point frequency off-set. At first, by analyzing frequency property of this filter, it was elucidated that on a constitution cascade connecting plural time-varying filters with equal zero point frequency, zero point multiplication could not be secured to deteriorate clutter supression features, to show effectiveness of the zero point frequency off-set. And then, it was shown by computer simulation that by using the proposed method, time-varying AMTI securing clutter supression features could be realized together with realizing reduction of operation quantities. |
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