Scattering center estimation of a conductive sphere using a superresolution technique
Understanding electromagnetic scattering phenomena at high frequencies is important in specifying the location of the local scattered wave (scattering center). This procedure also is available for the practical radar target recognition. Detection of the scattering center also is possible by means of...
Saved in:
| Published in | Electronics & communications in Japan. Part 3, Fundamental electronic science Vol. 77; no. 7; pp. 104 - 114 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
New York
Wiley Subscription Services, Inc., A Wiley Company
1994
|
| Subjects | |
| Online Access | Get full text |
Cover
Loading…
| Summary: | Understanding electromagnetic scattering phenomena at high frequencies is important in specifying the location of the local scattered wave (scattering center). This procedure also is available for the practical radar target recognition. Detection of the scattering center also is possible by means of the Fourier transform in the frequency data measured by a network analyzer. However, since its resolution is limited by the measured frequency bandwidth, practical applications may often be difficult.
In this paper, the use of the MUSIC algorithm which has a higher resolution than the Fourier transform is proposed for the time‐domain estimation method of the electromagnetic scattering. As an example, the detection of the scattering center in the backscattering measurement of a conductive sphere is discussed. It is pointed out that the algorithm can be applied without significant modifications. Most of the superresolution methods require many snapshots. It is found by computer simulation that the noise suppression preprocessing by time‐domain gating is effective for reduction of the snapshots. The setting of the number of incident signals (scattering center) of the MUSIC algorithm in the time‐gated data is discussed. Further, by experiments, these investigations were verified and the high‐resolution nature of the present method is proven. |
|---|---|
| Bibliography: | istex:A908082903225DAE406CFDF6056BA014FA3B100F ark:/67375/WNG-PMKHS9FC-C ArticleID:ECJC4430770709 Yasutaka Ogawa graduated from the Dept. of Electronic Engineering, Hokkaido University, in 1973 and completed his Ph.D. in 1978. In 1979, he became a Lecturer of the same department where he was promoted to an Associate Professor in 1980. He has been engaged in research on high‐resolution time domain measurement method and digital communication systems. He received a Niwa Memorial Award in 1978 and an Academic Promotion Award from I.E.I.C.E. in 1981. He was on leave in 1992‐93 at Ohio State University, engaging in research on high‐resolution time‐domain measurement method. He is a member of IEEE. Kiyohiko Itoh graduated from the Department of Electrical Engineering, Hokkaido University, in 1963 and completed the M.S. course in 1965. He received his Ph.D. from Hokkaido University in 1993. In that year, he became a Lecturer in the Department of Electronic Engineering, Hokkaido University, where he was promoted to an Associate Professor in 1966 and to a Professor in 1979. He has been engaged in research on electromagnetic radiation, antennas, electromagnetic measurement by means of a superresolution method and solar power satellites. He received a Yonezawa Award in 1968 and an SPS 91 Best Paper Award in 1991. He was on leave at Syracuse University in 1970‐71, working on antenna systems. He is a member of IEEE and the Institute of Television Engineering. Hiroyoshi Yamada graduated from the Dept. of Electronic Engineering, Hokkaido University, in 1988 and completed his Ph.D. in 1993. In that year, he became a Research Associate of the Faculty of Engineering, Niigata University. He has been engaged in research on the electromagnetic circuits, antenna, and scattering measurement using the high‐resolution time domain technique. He is a member of IEEE. |
| ISSN: | 1042-0967 1520-6440 |
| DOI: | 10.1002/ecjc.4430770709 |