JP2005529562A - 無線アドホック通信網内の到着時刻測定の精度を改善する装置と方法 - Google Patents
無線アドホック通信網内の到着時刻測定の精度を改善する装置と方法 Download PDFInfo
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- JP2005529562A JP2005529562A JP2004512426A JP2004512426A JP2005529562A JP 2005529562 A JP2005529562 A JP 2005529562A JP 2004512426 A JP2004512426 A JP 2004512426A JP 2004512426 A JP2004512426 A JP 2004512426A JP 2005529562 A JP2005529562 A JP 2005529562A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
- H04W56/007—Open loop measurement
- H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time
- H04W56/008—Open loop measurement based on arrival time vs. expected arrival time detecting arrival of signal based on received raw signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
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Abstract
Description
本発明の別の目的は、平方根レイズド・コサイン・パルス・シェイピングとチップ整合フィルタとを直接シーケンス拡散波形に用いてレイズド・コサイン濾波パルス応答を作る装置と方法とを提供することである。
本発明の別の目的は、レイズド・コサイン濾波パルス応答に基づいて自己相関関数を計算し、二次近似技術を用いてピーク値を計算する装置と方法とを提供することである。
本発明の別の目的は、改善されたTOA測定に用いられる実際の信号受信時刻を表すために決定されたピーク値を訂正する装置と方法とを提供することである。
ただし、この例では、Tcは31.25ns(チップ速度=32Mcps)のチップ周期、αは0.23に等しいアルファ・フィルタ・パラメータである。図3は、本発明の或る実施の形態に係る図1に示す網内の或るノードが実行した相関関数の一例を示す。
ただし、y0,y+,y-は、3連続チップを受信したときに自己相関関数が生成する3連続値である。これらの値はy0>y+およびy0>y-になるように選択される。
ただし、δは二次近似のピーク・オフセットを表し、δ’は平方根レイズド・コサイン・パルス・シェイピング関数が近似から少しずれているためにδを実際のピーク値にするのに必要な追加のオフセットを表す。δの値はピークの近似であり、δ’はシステムの誤差を補償した修正値である。この訂正の係数を経験的に計算してピーク決定の誤差を最小にする。
Claims (24)
- アドホック通信網内のノードの間で送信しかつ受信する信号の伝播時間を決定する方法であって、
前記複数の中の第1ノードを制御して、第2のノードから送られる少なくとも1つの信号を受信して前記信号に基づいて応答を計算し、
前記第1のノードを制御して前記応答の自己相関関数を計算して前記自己相関関数に基づいて二次近似の近似ピーク値を計算し、
前記第1のノードを制御して、前記応答と前記近似ピーク値との間の信号サンプリング位相オフセットを決定してこれに応じて前記応答の実際のピーク値を計算し、
前記第1のノードを制御して、前記実際のピーク値に基づいて前記第1のノードでの前記少なくとも1つの信号の実際の受信時刻を計算して前記実際の受信時刻に基づいて信号の伝播時間を決定する、
前記方法。 - 前記応答はレイズド・コサイン濾波パルス応答である、請求項1記載の方法。
- 前記第1のノードを制御して、平方根レイズド・コサイン・パルス・シェイピングとチップ整合フィルタとを前記信号の直接シーケンス拡散波形に用いることに基づいて前記応答を計算して少なくとも1つの平方根レイズド・コサイン関数を作ることを更に含む、請求項1記載の方法。
- 前記応答は各前記平方根レイズド・コサイン関数の重畳乗算を含む、請求項3記載の方法。
- アドホック通信網内のノードの間で送信しまた受信する信号の伝播時間を決定する装置であって、
前記複数の中の第1ノードを制御して、第2のノードから送られる少なくとも1つの信号を受信して前記信号に基づいて応答を計算するコントローラ、
を備え、
前記コントローラは更に前記第1のノードを制御して前記応答の自己相関関数を計算して前記自己相関関数に基づいて二次近似の近似ピーク値を計算し、
前記コントローラは更に前記第1のノードを制御して、前記応答と前記近似ピーク値との間の信号サンプリング位相オフセットを決定してこれに応じて前記応答の実際のピーク値を計算し、
前記コントローラは更に前記第1のノードを制御して、前記実際のピーク値に基づいて前記第1のノードでの前記少なくとも1つの信号の実際の受信時刻を計算して前記実際の受信時刻に基づいて信号の伝播時間を決定する、
前記装置。 - 前記応答はレイズド・コサイン濾波パルス応答である、請求項9記載の装置。
- 前記コントローラは前記第1のノードを制御して、平方根レイズド・コサイン・パルス・シェイピングとチップ整合フィルタとを前記信号の直接シーケンス拡散波形に用いることに基づいて前記応答を計算して少なくとも1つの平方根レイズド・コサイン関数を作る、請求項9記載の装置。
- 前記応答は各前記平方根レイズド・コサイン関数の重畳乗算を含む、請求項11記載の装置。
- アドホック通信網内のノードの間で送信しまた受信する信号の伝播時間を決定する命令のコンピュータ読取り可能な媒体であって、
前記複数の中の第1ノードを制御して、第2のノードから送られる少なくとも1つの信号を受信し、前記信号に基づいて応答を計算する第1の命令の集合と、
前記第1のノードを制御して前記応答の自己相関関数を計算し、前記自己相関関数に基づいて二次近似の近似ピーク値を計算する第2の命令の集合と、
前記第1のノードを制御して、前記応答と前記近似ピーク値との間の信号サンプリング位相オフセットを決定し、これに応じて前記応答の実際のピーク値を計算する第3の命令の集合と、
前記第1のノードを制御して、前記実際のピーク値に基づいて前記第1のノードでの前記少なくとも1つの信号の実際の受信時刻を計算し、前記実際の受信時刻に基づいて信号の伝播時間を決定する第4の命令の集合と、
を備える前記媒体。 - 前記応答はレイズド・コサイン濾波パルス応答である、請求項17記載の媒体。
- 前記第1の命令の集合は前記第1のノードを制御して、平方根レイズド・コサイン・パルス・シェイピングとチップ整合フィルタとを前記信号の直接シーケンス拡散波形に用いることに基づいて前記応答を計算して、少なくとも1つの平方根レイズド・コサイン関数を作る、請求項18記載の媒体。
- 前記応答は各前記平方根レイズド・コサイン関数の重畳乗算を含む、請求項19記載の媒体。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US38556202P | 2002-06-05 | 2002-06-05 | |
US10/303,842 US7054126B2 (en) | 2002-06-05 | 2002-11-26 | System and method for improving the accuracy of time of arrival measurements in a wireless ad-hoc communications network |
PCT/US2003/017259 WO2003105495A2 (en) | 2002-06-05 | 2003-06-04 | A system and method for improving the accuracy of time of arrival measurements in a wireless ad-hoc communications network |
Publications (2)
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JP2005529562A true JP2005529562A (ja) | 2005-09-29 |
JP4291265B2 JP4291265B2 (ja) | 2009-07-08 |
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JP2004512426A Expired - Fee Related JP4291265B2 (ja) | 2002-06-05 | 2003-06-04 | 無線アドホック通信網内の到着時刻測定の精度を改善する装置と方法 |
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US (1) | US7054126B2 (ja) |
EP (1) | EP1510021A4 (ja) |
JP (1) | JP4291265B2 (ja) |
KR (1) | KR20050004222A (ja) |
AU (1) | AU2003249674A1 (ja) |
CA (1) | CA2484796A1 (ja) |
WO (1) | WO2003105495A2 (ja) |
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-
2002
- 2002-11-26 US US10/303,842 patent/US7054126B2/en not_active Expired - Lifetime
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2003
- 2003-06-04 EP EP03757310A patent/EP1510021A4/en not_active Withdrawn
- 2003-06-04 AU AU2003249674A patent/AU2003249674A1/en not_active Abandoned
- 2003-06-04 CA CA002484796A patent/CA2484796A1/en not_active Abandoned
- 2003-06-04 WO PCT/US2003/017259 patent/WO2003105495A2/en active Application Filing
- 2003-06-04 JP JP2004512426A patent/JP4291265B2/ja not_active Expired - Fee Related
- 2003-06-04 KR KR10-2004-7019012A patent/KR20050004222A/ko not_active Application Discontinuation
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WO2003105495A2 (en) | 2003-12-18 |
KR20050004222A (ko) | 2005-01-12 |
AU2003249674A8 (en) | 2003-12-22 |
EP1510021A4 (en) | 2006-09-20 |
EP1510021A2 (en) | 2005-03-02 |
AU2003249674A1 (en) | 2003-12-22 |
CA2484796A1 (en) | 2003-12-18 |
JP4291265B2 (ja) | 2009-07-08 |
US20030227895A1 (en) | 2003-12-11 |
US7054126B2 (en) | 2006-05-30 |
WO2003105495A3 (en) | 2004-02-26 |
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