JP2006234811A - 入力信号と基準周波数との周波数差を得る方法並びにこの方法を実行する弁別装置、gps受信機及びコンピュータプログラム - Google Patents
入力信号と基準周波数との周波数差を得る方法並びにこの方法を実行する弁別装置、gps受信機及びコンピュータプログラム Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/29—Acquisition or tracking or demodulation of signals transmitted by the system carrier including Doppler, related
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
【解決手段】実際の数の標本点の二倍である一群の点上での離散フーリエ変換に対する様な回転因子に通常の回転因子が置き換えられている離散フーリエ変換の変形に基づく周波数弁別器。その様に変更された離散フーリエ変換は、計算負担を殆ど追加することなく半ビン周波数弁別を可能にする。ゼロ周波数に関して半ビンだけ偏移された二つの離散フーリエ変換は、弁別の線形応答と雑音に対する良好な耐性とを与える。この弁別器は、GPS受信機中で信号を追尾するためのFLL中で特に有用である。
【選択図】図8
Description
70 弁別器モジュール(周波数弁別手段)
Claims (12)
- 入力信号(x)と基準周波数との周波数差を得る方法であって、
上側周波数(fU)及び下側周波数(fD)が前記基準周波数の上下に配置されており、前記下側周波数(fD)における前記入力信号の離散スペクトル成分を抽出するための第一の演算子(HD)と前記上側周波数(fU)における前記入力信号の離散スペクトル成分を抽出するための第二の演算子(HU)との各々が対応スペクトル成分に対してその応答の最大値を有している、これら第一及び第二の演算子(HD,HU)を適用する段階と、
前記入力信号の基本周波数と前記基準周波数との間隔に依存する誤差値(65)を得るために前記二つのスペクトル成分の周波数の差を計算する段階と
を具備する方法。 - 前記上側周波数(fU)と前記下側周波数(fD)との間に含まれる何れの中間周波に対しても、前記第一及び第二の演算子(HD,HU)の応答がゼロにならないこと
を更に特徴とする請求項1に記載の方法。 - 前記上側周波数(fD)及び前記下側周波数(fU)が前記基準周波数を中心にして対称的に配置されていることを特徴とする請求項1または2に記載の方法。
- 前記入力信号の基本周波数と前記基準周波数との間隔に前記誤差値(65)が線形に依存することを特徴とする請求項1〜3の何れか一項に記載の方法。
- 前記基準周波数がゼロ周波数であることを特徴とする請求項1〜4の何れか一項に記載の方法。
- 前記二つの演算子(HD,HU)が出力の絶対値を計算する段階を含んでいることを特徴とする請求項1〜5の何れか一項に記載の方法。
- 前記第一及び第二の演算子からの二つのスペクトル成分の和で前記誤差値(65)を除算する段階を含んでいる請求項1〜6の何れか一項に記載の方法。
- 前記入力信号(x)が一群のN個の連続標本(xi)を含んでおり、次数2Nの1の2N個の別個の複素根から取り出された重み(W)因子付きの、前記標本(xi)の一次結合を前記第一及び第二の演算子(HD,HU)が含んでいることを特徴とする請求項1〜7の何れか一項に記載の方法。
- 入力信号を受信するための入力装置と、前記入力信号の基本周波数と基準周波数との差に依存する出力信号(65)を発生させるための周波数弁別手段(70)とを具備しており、請求項1〜9の何れか一項の方法を実行する様に前記弁別手段が構成されている、弁別装置。
- 請求項10に記載の弁別装置を含むGPS受信機。
- 請求項1〜9の何れか一項の方法を実行するためのコンピュータプログラム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05101463.7 | 2005-02-25 | ||
EP05101463A EP1696557B1 (en) | 2005-02-25 | 2005-02-25 | Half bin linear frequency discriminator |
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JP2012087634A Division JP5684187B2 (ja) | 2005-02-25 | 2012-04-06 | 入力信号と基準周波数との周波数差を得る方法並びにこの方法を実行する弁別装置、gps受信機及びコンピュータプログラム |
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JP2006234811A true JP2006234811A (ja) | 2006-09-07 |
JP2006234811A5 JP2006234811A5 (ja) | 2010-06-03 |
JP5226186B2 JP5226186B2 (ja) | 2013-07-03 |
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JP2006040423A Expired - Fee Related JP5226186B2 (ja) | 2005-02-25 | 2006-02-17 | 入力信号と基準周波数との周波数差を得る方法並びにこの方法を実行する弁別装置、gps受信機及びコンピュータプログラム |
JP2012087634A Expired - Fee Related JP5684187B2 (ja) | 2005-02-25 | 2012-04-06 | 入力信号と基準周波数との周波数差を得る方法並びにこの方法を実行する弁別装置、gps受信機及びコンピュータプログラム |
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JP2012087634A Expired - Fee Related JP5684187B2 (ja) | 2005-02-25 | 2012-04-06 | 入力信号と基準周波数との周波数差を得る方法並びにこの方法を実行する弁別装置、gps受信機及びコンピュータプログラム |
Country Status (6)
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US (2) | US7528632B2 (ja) |
EP (1) | EP1696557B1 (ja) |
JP (2) | JP5226186B2 (ja) |
AT (1) | ATE374447T1 (ja) |
DE (1) | DE602005002618T2 (ja) |
ES (1) | ES2294631T3 (ja) |
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JPWO2022091331A1 (ja) * | 2020-10-30 | 2022-05-05 | ||
WO2022091329A1 (ja) * | 2020-10-30 | 2022-05-05 | 三菱電機株式会社 | 周波数検出器 |
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---|---|---|---|---|
JPWO2022091331A1 (ja) * | 2020-10-30 | 2022-05-05 | ||
WO2022091329A1 (ja) * | 2020-10-30 | 2022-05-05 | 三菱電機株式会社 | 周波数検出器 |
WO2022091331A1 (ja) * | 2020-10-30 | 2022-05-05 | 三菱電機株式会社 | 周波数検出器 |
JP7204064B2 (ja) | 2020-10-30 | 2023-01-13 | 三菱電機株式会社 | 周波数検出器 |
Also Published As
Publication number | Publication date |
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DE602005002618T2 (de) | 2008-07-24 |
US20090273372A1 (en) | 2009-11-05 |
JP5226186B2 (ja) | 2013-07-03 |
ES2294631T3 (es) | 2008-04-01 |
EP1696557B1 (en) | 2007-09-26 |
EP1696557A1 (en) | 2006-08-30 |
DE602005002618D1 (de) | 2007-11-08 |
US7528632B2 (en) | 2009-05-05 |
US7843228B2 (en) | 2010-11-30 |
JP2012168187A (ja) | 2012-09-06 |
JP5684187B2 (ja) | 2015-03-11 |
ATE374447T1 (de) | 2007-10-15 |
US20060226824A1 (en) | 2006-10-12 |
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