Search Results:　 1-20 of 124

1

Blind Box-Counting Based Detection of Low Observable Targets within Sea Clutter

POURNEJATIAN Nima M. , NAYEBI Mohammad M. , TABAN Mohammad R.

… Accurate modeling of sea clutter and detection of low observable targets within sea clutter are the major goals of radar signal processing applications. … Recently, fractal geometry has been applied to the analysis of high range resolution radar sea clutters. …

IEICE Transactions on Communications E95.B(12), 3863-3872, 2012

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2

Amplitude Statistics of Sea Clutter by MDL Principle [in Japanese]

Sayama Shuji , Ishii Seishiro

… We have observed sea clutter using an X-band radar with a frequency of 9.41GHz, a beamwidth of 1.0°, and a pulsewidth of 0.5μs. … To investigate sea clutter amplitude statistics, we introduce four probability distribution models and the Minimum Description Length (MDL) principle, which is more rigorous comparison between the distributions than the Akaike Information Criterion (AIC). …

IEEJ Transactions on Fundamentals and Materials 132(10), 886-892, 2012

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3

Study of Influence by Size of Ship in Weibull CFAR Processing : Dedicated to Professor Masatoshi SARUWATARI [in Japanese]

田口直樹 , 石井誠四郎 , 佐山周次

防衛大学校理工学研究報告 49(1), 69-75, 2011-09-00
4

Introduce to research: High altitude of radar signal processing technology for sea clutter removal [in Japanese]

谷口大揮

Defense technology journal 31(7), 5-11, 2011-07-00
5

Study on Effect of Sea Condition for Statistical Properties of Sea Clutter using an X-band Radar [in Japanese]

ISHII Seishiro , OKAMOTO Yosuke , UTSUNOMIYA Toshio

… We observed sea clutter using an X-band Radar in some area of Tokyo Bay including ships on the Uraga Suido traffic route and the Daini Kaiho sea fort, and furthermore observed the sea condition. … By analyzing the observed data statistically, we studied the effect of the sea condition for the statistical properties of the sea clutter. …

IEEJ Transactions on Fundamentals and Materials 131(4), 263-269, 2011-04-01

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6

B-2-15 Effect of Sea Condition for Statistical Properties of Sea Clutter [in Japanese]

Okamoto Yosuke , Ishii Seishiro , Utsunomiya Toshio

Proceedings of the IEICE General Conference 2011年_通信(1), 246, 2011-02-28

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7

B-2-14 Coherent Integration with Null Constraint for Detection of Slow Moving Target in Ground or Sea Clutter [in Japanese]

Takahashi Ryuhei , Hirata Kazufumi , Matsuda Shoji

Proceedings of the IEICE General Conference 2011年_通信(1), 245, 2011-02-28

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8

Analysis of Backscattering from Radar to Target above Inhomogeneous Random Rough Surface [in Japanese]

Nakashima Shunsuke , Uchida Kazunori , Honda Junichi

本稿では,電磁界散乱問題の解析手法の一つである離散型レイ・トレース法(DRTM:Discrete Ray Tracing Method)を用いて,不均質ランダム粗面上を飛来する散乱体からの後方散乱問題について数値解析する.まず解析手法であるDRTMを紹介し,本手法を後方散乱問題の解析に応用する.均質および不均質ランダム粗面上を飛来する散乱体からの後方散乱受信電力を比較することにより,粗面からのクラ …

ITE Technical Report 35(3), 5-8, 2011-01-20

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9

Scan-to-Scan Integration-Correlation Processing Extended for Moving Targets [in Japanese]

TAKAYAMA Takuya , TOKIEDA Yukinobu , SUGAWARA Hiroki

船舶交通管理システムや船舶搭載の航法支援の用途で,X帯やKu帯といった高い周波数のレーダが広く用いられている.そのような高い周波数では海面からのシークラッタや雨雪からのウェザクラッタが大きくなり,船舶など海面上のターゲットの認識率を低下させる原因となる.スキャン間相関処理はこれらクラッタを抑圧する効果的な信号処理方法であるが,従来のスキャン間相関処理は高速移動ターゲット信号も抑圧してしまう欠点があ …

Technical report of IEICE. SANE 110(348), 1-6, 2010-12-10

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10

Suppression of Weibull and log-normal distributed clutter (dedicated to Professor Tadashi Inoue) [in Japanese]

田中領作 , 石井誠四郎 , 佐山周次

防衛大学校理工学研究報告 48(1), 85-91, 2010-09-00
11

Signal Analysis of Radar Echoes from the Overhead Power Cable [in Japanese]

YAMADA Tatsuto , MIZUI Sinji , IWASAKI Hiroki

… In this study, we review the detailed formularization of radar signal intensity of the cable with the data from other sea area, and the following results have been found. … 2) The changes of signal intensity with actual data can be explained by the model considering the influence of cross protection between the reflection waves by sea clutter and the actual waves. … 3) The proposed model is versatile without locality of sea area. …

日本航海学会論文集 (122), 1-6, 2010-03-25

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12

Analysis of clutter included radar interference by an adaptive Q-Q plot [in Japanese]

川端秀和 , 石井誠四郎 , 佐山周次

防衛大学校理工学研究報告 47(2), 1-7, 2010-03-00
13

A novel technique for small ship detection by using MLCC and CFAR from SAR images(WSANE 2009 (Workshop for Space, Aeronautical and Navigational Electronics))

Hwang Seong-In , Ouchi Kazuo

… During the calibration and validation stage of ALOS-PALSAR (Advanced Land Observing Satellite-Phased Array L-band Synthetic Aperture Radar) in 2006, we examined 4 ship detection algorithms including MLCC (Multi-Look Cross-Correlation) which is an useful technique to extract the images of ships embedded in heavy sea clutter. …

Technical report of IEICE. SANE 109(265), 263-268, 2009-10-26

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14

Suppression of Clutter Near Port by S-Band Radar [in Japanese]

ISHII Seishiro , SAYAMA Syuji

… To suppress such Weibull-distributed clutter, a new adaptive method was proposed by the present authors. … To apply this new method to practical problems observed by an S-band radar, computer simulation were made for a finite number of samples in order to obtain the CFAR maintenance in Weibull radar clutter which was including sea clutter and ground clutter from a variety of terrain near the port. …

IEEJ Transactions on Fundamentals and Materials 129(8), 537-542, 2009-08-01

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15

A Novel Method of Ship Detection by Applying CFAR to Coherence Images Produced by Multi-Look SAR Cross-Correlation Technique [in Japanese]

HWANG S. I. , OUCHI K.

船舶検出法の一つであるMLCC(Multi-Look Cross-Correlation)は高分解能のSAR(Synthetic Aperture Radar)画像のシークラッタに埋もれている船舶を検出する方法としてよく知られている。著者らは先行研究でPALSAR(Phased Array L-band SAR)を利用し、MLCC手法を使うことでレーダに透明な小型船舶の検出が可能であることを明らか …

Technical report of IEICE. SANE 109(69), 1-6, 2009-05-22

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16

TK-2-3 A New Approach to Ship Detection in a Polarimetric SAR Image

Yang Jian , Cui Yi

… Experiments results of the NASA/JPL AIRSAR C-Band image over Sydney Coast show that the proposed method has a considerably improvement as to enlarge the separation of ships and sea clutter, demonstrating a robust detection performance. …

Proceedings of the IEICE General Conference 2009年_基礎・境界, "SSS-9"-"SSS-12", 2009-03-04

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17

TK-2-3 A New Approach to Ship Detection in a Polarimetric SAR Image

Jian Yang , Yi Cui

… Experiments results of the NASA/JPL AIRSAR C-Band image over Sydney Coast show that the proposed method has a considerably improvement as to enlarge the separation of ships and sea clutter, demonstrating a robust detection performance. …

Proceedings of the IEICE General Conference 2009年_通信(2), "SSS-9"-"SSS-12", 2009-03-04

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18

TK-2-3 A New Approach to Ship Detection in a Polarimetric SAR Image

Yang Jian , Cui Yi

… Experiments results of the NASA/JPL AIRSAR C-Band image over Sydney Coast show that the proposed method has a considerably improvement as to enlarge the separation of ships and sea clutter, demonstrating a robust detection performance. …

Proceedings of the IEICE General Conference 2009年_通信(1), "SSS-9"-"SSS-12", 2009-03-04

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19

TK-2-3 A New Approach to Ship Detection in a Polarimetric SAR Image

Yang Jian , Cui Yi

… Experiments results of the NASA/JPL AIRSAR C-Band image over Sydney Coast show that the proposed method has a considerably improvement as to enlarge the separation of ships and sea clutter, demonstrating a robust detection performance. …

Proceedings of the IEICE General Conference 2009年_情報・システム(2), "SSS-9"-"SSS-12", 2009-03-04

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20

TK-2-3 A New Approach to Ship Detection in a Polarimetric SAR Image

Jian Yang , Yi Chui

… Experiments results of the NASA/JPL AIRSAR C-Band image over Sydney Coast show that the proposed method has a considerably improvement as to enlarge the separation of ships and sea clutter, demonstrating a robust detection performance. …

Proceedings of the IEICE General Conference 2009年_情報・システム(1), "SSS-9"-"SSS-12", 2009-03-04

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Search Results:　 1-20 of 124

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Search Results: 1-20 of 124

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Search Results:　 1-20 of 124