JP5214133B2 - レーダ検出および動的周波数選択 - Google Patents
レーダ検出および動的周波数選択 Download PDFInfo
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/021—Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/04—Systems determining presence of a target
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
- G01S7/0232—Avoidance by frequency multiplex
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Circuits Of Receivers In General (AREA)
- Radar Systems Or Details Thereof (AREA)
- Mobile Radio Communication Systems (AREA)
- Control Of Amplification And Gain Control (AREA)
Description
R=cΔt/2
よって求めることができる。ただし、c=3×108m/sであり、このcは光速である。式中の除数2は往復を考慮したものである。
Claims (13)
- 無線周波数(RF)信号の所定の部分における相関を求め、前記所定の部分の前記相関に基づいて相関信号を発生する相関モジュールと、
前記RF信号に基づき利得制御信号を発生する自動利得制御(AGC)モジュールと、
前記RF信号をデジタルRF信号に変換するコンバータモジュールと、
前記相関信号および前記利得制御信号に基づき、前記RF信号がレーダ信号であるか否かを選択的に判定し、前記デジタルRF信号の値が所定の値未満に低下したときに、前記AGCモジュールをリセットするリセット信号を発生する制御モジュールと、
を備え、
前記制御モジュールが、
前記利得制御信号と、該利得制御信号に続く前記リセット信号との間の期間中に、前記デジタルRF信号を、等しい時間幅を有するN個(Nは1より大きい整数)のセグメントに分割し、
前記N個のセグメントのそれぞれにおけるゼロ交差の数をカウントし、
前記N個のセグメントのうちの第1のセグメントにおけるゼロ交差の数と前記N個のセグメントのうちの第2のセグメントにおけるゼロ交差の数の間の第1の差を求め、
前記第1の差が第1の所定の閾値以上である場合に、前記RF信号がチャープレーダ信号であると判定する、
無線ネットワーク装置。 - 前記制御モジュールは、前記RF信号が無線データのパケットではないことを前記相関信号が示す場合に、前記RF信号がレーダ信号であるか否かを判定する、請求項1に記載の無線ネットワーク装置。
- 前記制御モジュールは、前記AGCモジュールの利得が所定の閾値を超えていることを前記利得制御信号が示す場合に、前記RF信号がレーダ信号であるか否かを判定する、請求項1に記載の無線ネットワーク装置。
- 前記制御モジュールは、前記利得制御信号と、前記利得制御信号に続く前記リセット信号との間の時間差に基づき、前記RF信号のパルスのパルス幅を決定する、請求項1に記載の無線ネットワーク装置。
- 前記制御モジュールは、前記RF信号の所定数の隣接パルスの前記パルス幅が所定のレーダパルスのパルス幅と等しい場合に、前記RF信号がレーダ信号であると判定する、請求項4に記載の無線ネットワーク装置。
- 前記RF信号がレーダ信号であると前記制御モジュールが判定した場合に、前記ネットワーク装置の通信チャネルを変更するチャネル変更モジュールを更に備える、請求項1に記載の無線ネットワーク装置。
- 前記無線ネットワーク装置が、アクセスポイントとクライアントステーションのうちの一方である、請求項1に記載の無線ネットワーク装置。
- レーダを検出する方法であって、
無線周波数(RF)信号の所定の部分における相関を求めるステップと、
前記相関に基づき相関信号を発生するステップと、
前記RF信号に基づき利得制御信号を発生するステップと、
前記相関信号および前記利得制御信号に基づき、前記RF信号がレーダ信号であるか否かを選択的に判定するステップと、
前記RF信号をデジタルRF信号に変換するステップと、
前記デジタルRF信号の値が所定の値未満に低下したときに、自動利得制御(AGC)モジュールをリセットするリセット信号を発生するステップと、
前記利得制御信号と、該利得制御信号に続く前記リセット信号との間の期間中に、前記デジタルRF信号を、等しい時間幅を有するN個(Nは1より大きい整数)のセグメントに分割するステップと、
前記N個のセグメントのそれぞれにおけるゼロ交差の数をカウントするステップと、
前記N個のセグメントのうちの第1のセグメントにおけるゼロ交差の数と前記N個のセグメントのうちの第2のセグメントにおけるゼロ交差の数の間の第1の差を求めるステップと、
前記第1の差が第1の所定の閾値以上である場合に、前記RF信号がチャープレーダ信号であると判定するステップと、
を含む方法。 - 前記RF信号が無線データのパケットではないことを前記相関信号が示す場合に、前記RF信号がレーダ信号であるか否かを判定するステップを更に含む、請求項8に記載の方法。
- 自動利得制御(AGC)モジュールの利得が所定の閾値を超えていることを前記利得制御信号が示す場合に、前記RF信号がレーダ信号であるか否かを判定するステップを更に含む、請求項8に記載の方法。
- 前記利得制御信号と、前記利得制御信号に続く前記リセット信号との間の時間差に基づき、前記RF信号のパルスのパルス幅を決定するステップを更に含む、請求項8に記載の方法。
- 前記RF信号の所定数の隣接パルスの前記パルス幅が、所定のレーダパルスのパルス幅と等しい場合に、前記RF信号がレーダ信号であると判定するステップを更に含む、請求項11に記載の方法。
- 前記RF信号がレーダ信号であると判定された場合に、通信チャネルを変更するステップを更に含む、請求項8に記載の方法。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US74248005P | 2005-12-05 | 2005-12-05 | |
US60/742480 | 2005-12-05 | ||
US11/410,938 US7702044B2 (en) | 2005-12-05 | 2006-04-25 | Radar detection and dynamic frequency selection |
US11/410938 | 2006-04-25 |
Publications (3)
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JP2007171164A JP2007171164A (ja) | 2007-07-05 |
JP2007171164A5 JP2007171164A5 (ja) | 2009-12-03 |
JP5214133B2 true JP5214133B2 (ja) | 2013-06-19 |
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JP2006300741A Active JP5214133B2 (ja) | 2005-12-05 | 2006-11-06 | レーダ検出および動的周波数選択 |
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Country | Link |
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US (2) | US7702044B2 (ja) |
EP (1) | EP1793241B1 (ja) |
JP (1) | JP5214133B2 (ja) |
KR (1) | KR101256217B1 (ja) |
CN (1) | CN1979217B (ja) |
DE (1) | DE602006007203D1 (ja) |
SG (1) | SG132590A1 (ja) |
TW (1) | TWI401462B (ja) |
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CN1979217B (zh) | 2012-01-04 |
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EP1793241A2 (en) | 2007-06-06 |
US20070126622A1 (en) | 2007-06-07 |
US20100202359A1 (en) | 2010-08-12 |
EP1793241A3 (en) | 2007-07-04 |
KR20070058994A (ko) | 2007-06-11 |
SG132590A1 (en) | 2007-06-28 |
CN1979217A (zh) | 2007-06-13 |
KR101256217B1 (ko) | 2013-04-19 |
JP2007171164A (ja) | 2007-07-05 |
EP1793241B1 (en) | 2009-06-10 |
US9366750B2 (en) | 2016-06-14 |
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US7702044B2 (en) | 2010-04-20 |
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