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Publication
Featured researches published by Toshihiko Hagisawa.
IEEE Transactions on Aerospace and Electronic Systems | 1981
Matsuo Sekine; S. Ohtani; Toshimitsu Musha; Takeru Irabu; Eiichi Kiuchi; Toshihiko Hagisawa; Yuichi Tomita
Weibull-distributed ground clutter of cultivated land was measured using an L-band long-range air-route surveillance radar (ARSR) having a 3.0 ¿s pulsewidth and a 1.23° beamwidth at very low grazing angles between 0.21° and 0.32°. It is shown that the shape parameter of the Weibull distribution varied from c = 1.507 to c = 2.0, corresponding to the Rayleigh distribution.
IEEE Transactions on Aerospace and Electronic Systems | 1979
Matsuo Sekine; Toshimitsu Musha; Yuichi Tomita; Toshihiko Hagisawa; Takeru Irabu; Elichi Kiuchi
Weather clutter was observed using an L band range (200nmi) air-route surveillance radar (ARSR). It is shown that the measured clutter amplitudes obey a Weibull distribution.
IEEE Transactions on Aerospace and Electronic Systems | 1982
Matsuo Sekine; Shingo Ohatani; Toshimitsu Musha; Takeru Irabu; Eiichi Kiuchi; Toshihiko Hagisawa; Yuichi Tomita
It is shown that the Weibull-distributed ground clutter obeys a Weibull distribution after processing by the double canceler moving target indicator (MTI).
international conference on acoustics, speech, and signal processing | 1976
Takeru Irabu; Yuichi Tomita; Toshihiko Hagisawa; Eiichi Kiuchi
The need of primary radars adaption into an automatic control system has led to the development of various anti-clutter techniques to provide high and reliable detectability in heavy clutter conditions. (1) However, the techniques mainly based on MTI canceller still have inherent limitations, such as inadequate improvement of detection in a moving clutter and heavy ground clutter and deterioration of the MTI detection probability of a target flying tangentially toward the radar. To improve these limitations, this paper discusses a new clutter rejection system - discrete Fourier transform cascaded by a plane average-subtract processing unit. The method is based on frequency discrimination and utilization of difference of spatial spread between targets and clutters.
Archive | 1984
Hiroshi Nakamura; Eiichi Kiuchi; Toshihiko Hagisawa
IEE Proceedings F Communications, Radar and Signal Processing | 1980
Matsuo Sekine; Toshimitsu Musha; Yuichi Tomita; Toshihiko Hagisawa; T. Irabu; Eiichi Kiuchi
Archive | 1985
Fusaji Togashi; Toshihiko Hagisawa
IEE Proceedings F Communications, Radar and Signal Processing | 1983
Matsuo Sekine; Toshimitsu Musha; Yuichi Tomita; Toshihiko Hagisawa; Takeru Irabu; Eiichi Kiuchi
IEE Proceedings F Communications, Radar and Signal Processing | 1980
Matsuo Sekine; Toshimitsu Musha; T. Irabu; Eiichi Kiuchi; Toshihiko Hagisawa; Yuichi Tomita
Archive | 1983
Toshimitsu Musha; Eichi Kiuchi; Toshihiko Hagisawa
