| 電子情報通信学会 研究会発表申込システム 講演論文 詳細 |
技報閲覧サービス [ログイン] 技報アーカイブ |
| トップに戻る | 前のページに戻る | [Japanese] / [English] |
| 講演抄録／キーワード | ||
| 講演名 | 2007-04-16 10:20 ［招待講演］[Invited] GNSS Phase Ambiguity Validation:A Review ○P. Teunissen・S. Verhagen（Delft Univ.）  SANE2007-1 |
|
| 抄録 | （和） | The LAMBDA method is very suitable for Multi-Carrier Ambiguity Resolution (MCAR), which is of interest with the coming of Galileo and the modernisation of GPS. Ambiguity resolution involves, however, not only integer estimation, but often also a decision on whether or not to accept the estimated integers. In this contribution, we show the relevance of this decision-step and show that integer aperture estimation is the proper theory for handling the combined integer estimation/acceptance problem. With this approach the user sets his/her own failure rate (irrespective of the strength of the underlying model), thus generating an aperture space which forms the basis of the decision process: the integer solution is chosen as output if the float solution resides inside the aperture space, otherwise the float solution is maintained. We show how the various approaches as used in the literature fit in the framework of integer aperture estimation and we also present the optimal integer aperture estimator. We also show how the popular ratio test fits in this framework. The weak point of this test, as it is currently used in practice, is the choice of the threshold value which determines whether or not the fixed solution will be accepted. Mostly a fixed value is used, not depending on the model under consideration. It will be shown here that this approach will often be too conservative, meaning that the fixed solution is rejected while the probability of being wrong is actually very low. This implies that the time to first fix may be unnecessarily long. |
| （英） | The LAMBDA method is very suitable for Multi-Carrier Ambiguity Resolution (MCAR), which is of interest with the coming of Galileo and the modernisation of GPS. Ambiguity resolution involves, however, not only integer estimation, but often also a decision on whether or not to accept the estimated integers. In this contribution, we show the relevance of this decision-step and show that integer aperture estimation is the proper theory for handling the combined integer estimation/acceptance problem. With this approach the user sets his/her own failure rate (irrespective of the strength of the underlying model), thus generating an aperture space which forms the basis of the decision process: the integer solution is chosen as output if the float solution resides inside the aperture space, otherwise the float solution is maintained. We show how the various approaches as used in the literature fit in the framework of integer aperture estimation and we also present the optimal integer aperture estimator. We also show how the popular ratio test fits in this framework. The weak point of this test, as it is currently used in practice, is the choice of the threshold value which determines whether or not the fixed solution will be accepted. Mostly a fixed value is used, not depending on the model under consideration. It will be shown here that this approach will often be too conservative, meaning that the fixed solution is rejected while the probability of being wrong is actually very low. This implies that the time to first fix may be unnecessarily long. | |
| キーワード | （和） | LAMBDA method / integer aperture estimation / user-defined failure rate / / / / / |
| （英） | LAMBDA method / integer aperture estimation / user-defined failure rate / / / / / | |
| 文献情報 | 信学技報, vol. 107, no. 2, SANE2007-1, pp. 1-6, 2007年4月. | |
| 資料番号 | SANE2007-1 | |
| 発行日 | 2007-04-09 (SANE) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | SANE2007-1 |
|
| 研究会情報 | |
| 研究会 | SANE |
| 開催期間 | 2007-04-16 - 2007-04-18 |
| 開催地（和） | ARRC(Perth) |
| 開催地（英） | ARRC(Perth) |
| テーマ（和） | WSANE2007 |
| テーマ（英） | Joint workshop WSANE2007 |
| 講演論文情報の詳細 | |
| 申込み研究会 | SANE |
| 会議コード | 2007-04-SANE |
| 本文の言語 | 英語 |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | [Invited] GNSS Phase Ambiguity Validation:A Review |
| サブタイトル（英） | |
| キーワード(1)（和/英） | LAMBDA method / LAMBDA method |
| キーワード(2)（和/英） | integer aperture estimation / integer aperture estimation |
| キーワード(3)（和/英） | user-defined failure rate / user-defined failure rate |
| キーワード(4)（和/英） | / |
| キーワード(5)（和/英） | / |
| キーワード(6)（和/英） | / |
| キーワード(7)（和/英） | / |
| キーワード(8)（和/英） | / |
| 第1著者 氏名（和/英/ヨミ） | P. Teunissen / P. Teunissen / |
| 第1著者 所属（和/英） | Delft University of Technology (略称： Delft Univ.) Delft University of Technology (略称： Delft Univ.) |
| 第2著者 氏名（和/英/ヨミ） | S. Verhagen / S. Verhagen / |
| 第2著者 所属（和/英） | Delft University of Technology (略称： Delft Univ.) Delft University of Technology (略称： Delft Univ.) |
| 講演者 | 第1著者 |
| 発表日時 | 2007-04-16 10:20:00 |
| 発表時間 | 25分 |
| 申込先研究会 | SANE |
| 資料番号 | SANE2007-1 |
| 巻番号（vol） | vol.107 |
| 号番号（no） | no.2 |
| ページ範囲 | pp.1-6 |
| ページ数 | 6 |
| 発行日 | 2007-04-09 (SANE) |
[研究会発表申込システムのトップページに戻る] (日本語ページの行間係数: 1)