JP2007530970A5 - - Google Patents

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JP2007530970A5
JP2007530970A5 JP2007505635A JP2007505635A JP2007530970A5 JP 2007530970 A5 JP2007530970 A5 JP 2007530970A5 JP 2007505635 A JP2007505635 A JP 2007505635A JP 2007505635 A JP2007505635 A JP 2007505635A JP 2007530970 A5 JP2007530970 A5 JP 2007530970A5
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time
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JP4880586B2 (ja
JP2007530970A (ja
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Claims (15)

  1. 伝送リンク上での時間変化外乱の位置を評価する方法であって、
    1組の信号コピーがあるようにソースから出力信号を少なくとも部分的にコピーするステップと、
    前記信号コピーを前記伝送リンク上に送信するステップと、
    前記伝送リンクから少なくとも部分的に以前にその上で送信された帰還信号コピーを受信するステップと、
    組み合わせ信号を生じさせるために送信された組の前記受信された信号コピーを結合するステップと、
    前記伝送リンク上の前記外乱の位置を評価するために前記組み合わせ信号の時間特性を使用するステップと、を含む方法。
  2. 前記時間特性は、外乱特長が前記組み合わせ信号で発生する時間を含む、請求項1に記載の方法。
  3. 信号コピーが、前記信号コピーが前記伝送リンクに沿って移動するにつれ分散後方散乱のプロセスにより返される、請求項1又は請求項2に記載の方法。
  4. 前記ソースは、光パルスの形式を有する出力信号を生じさせるように構成され、各光パルスが、パルスが前記伝送リンクに沿って移動するにつれ経時的に分散される組み合わせ信号を引き起こす、請求項3に記載の方法。
  5. 前記組み合わせ信号は、間隙を介した時間位置の第1の集合と、時間位置の第2の集合でサンプリングされ、第1のサンプリングされた集合と第2のサンプリングされた集合は比較ステップで比較される、請求項1乃至請求項4のいずれか1項に記載の方法。
  6. 前記第1の集合と第2の集合の時間位置はインタリーブされる、請求項5に記載の方法。
  7. 前記比較ステップは、前記第1の集合と第2の集合の間の差異に少なくとも部分的に依存するデータの集合を生成することを含む、請求項5又は請求項6に記載の方法。
  8. 前記信号コピーは、前記光伝送リンクの共通伝送媒体に沿って伝送される、請求項1乃至請求項7のいずれか1項に記載の方法。
  9. 1組の信号コピーが、互いを基準にした遅延差のある前記伝送リンクに沿って移動する、請求項1乃至請求項8のいずれか1項に記載の方法。
  10. 前記遅延差は光学ソースに結合された不均衡干渉計で引き起こされ、前記干渉計は第1の経路と第2の経路を有し、前記第1の経路の遷移時間は前記第2の経路の遷移時間より長く、1組の信号コピーは互いにとって異なるそれぞれの経路に沿って移動させられる、請求項9に記載の方法。
  11. 前記出力信号は、1ピコ秒未満の該信号と関連付けられる平均位相コヒーレンス時間を有する、請求項1乃至請求項10のいずれか1項に記載の方法。
  12. 1組の前記信号コピーは、該コピーと関連付けられる遅延差時間を有し、前記遅延時間が少なくとも1000という因数分、平均位相コヒーレンス時間より大きい、請求項11に記載の方法。
  13. 前記伝送リンクは誘導トラックに沿って延在する光チャネルを含み、前記誘導トラックは車両の移動を誘導するように構成され、前記チャネルは、前記車両の移動が前記光チャネルに沿って外乱を引き起こすように構成される、請求項1乃至請求項12のいずれか1項に記載の方法。
  14. 伝送リンクを監視するための監視ステーションであって、前記監視ステーションは、出力信号を生成するためのソースと、出力信号ごとに1組の信号コピーがあるように前記ソースから前記出力信号を少なくとも部分的にコピーするための干渉計段階と、前記伝送リンク上に前記信号コピーを開始するための出力と、プロセッサ回路を有し、前記干渉計段階は、分散後方散乱のプロセスにより返される信号コピーを前記リンクから受信し、干渉信号を生じさせるために前記信号コピーを結合するように構成され、前記プロセッサ回路は前記帰還信号の時間特性の表示に関連して前記干渉信号を記憶するように構成される監視ステーション。
  15. 前記干渉信号は時間分散信号であり、前記プロセッサ回路は周期的に前記干渉信号をサンプリングし、サンプルごとにそれぞれの再帰時間と関連して前記サンプルを記憶するように構成される、請求項14に記載の監視ステーション。
JP2007505635A 2004-03-31 2005-03-31 外乱の位置の評価 Active JP4880586B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0407386.2A GB0407386D0 (en) 2004-03-31 2004-03-31 Monitoring a communications link
GB0407386.2 2004-03-31
PCT/GB2005/001269 WO2005095917A2 (en) 2004-03-31 2005-03-31 Evaluating the position of a time-varying disturbance

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JP2007530970A JP2007530970A (ja) 2007-11-01
JP2007530970A5 true JP2007530970A5 (ja) 2007-12-13
JP4880586B2 JP4880586B2 (ja) 2012-02-22

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US (1) US7974182B2 (ja)
EP (1) EP1747445B1 (ja)
JP (1) JP4880586B2 (ja)
KR (1) KR101397775B1 (ja)
CN (1) CN1938575B (ja)
CA (1) CA2560780A1 (ja)
GB (1) GB0407386D0 (ja)
WO (1) WO2005095917A2 (ja)

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