講演抄録/キーワード |
講演名 |
2004-12-20 11:20
FHパターン一括尤度比判定法の検討 ○酒井正和・太刀川信一(長岡技科大)・浜村昌則(高知工科大) |
抄録 |
(和) |
本稿文では,一括尤度比計算によるFHパターン検出法を提案し,その特性について示す.従来のFH方式では,周波数選択性フェージング等の伝送路変動があった場合,各周波数スロットの信号の大きさが変わるため,パターン検出に大きな劣化を生じる.そこで,FHパターンの検出精度を向上させるために,時間軸方向からの尤度比計算と周波数軸方向からの尤度比計算の繰り返しにより判定を行う繰り返し尤度比計算が考えられた.さらに本稿では,時間軸-周波数軸の2次元パターン全体の尤度比を計算し,とりうるパターンの中でどれに最も近いかを判定する一括尤度比計算法を提案し,従来法,繰り返し法との比較検討を行う. |
(英) |
This paper proposes a novel detection method of frequency hopping(FH) pattern by a lump likelihood ratio calculation, and presents its properties. In a conventional FH system, large degradation of pattern detection arises by fluctuation of signal level for each frequency slot over a frequency selective fading channel. Then, in order to improve the accuracy of FH detection, a method which is decided by iterative likelihood ratio calculations from time-axis and frequency-axis was proposed. Furthermore, in this paper, another method which is decided by the whole likelihood ratio calculation from both time-axis and frequency-axis together, named a lump likelihood ratio calculation, is proposed, and the comparisons with the conventional method, the iterative likelihood ratio method and the proposed method are discussed. |
キーワード |
(和) |
周波数ホッピング(FH) / 繰り返し尤度比計算 / 一括尤度比計算 / 多レベルFSK(MFSK) / / / / |
(英) |
frequency hopping(FH) / iterative likelihood ratio calculation / lump likelihood ratio calculation / multilevel FSK(MFSK) / / / / |
文献情報 |
信学技報, vol. 104, no. 535, WBS2004-49, pp. 23-28, 2004年12月. |
資料番号 |
WBS2004-49 |
発行日 |
2004-12-13 (WBS) |
ISSN |
Print edition: ISSN 0913-5685 |
PDFダウンロード |
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