JP6208710B2 - 距離ゲートを用いたホログラフィックレーダおよびホログラフィックレーダセンサ - Google Patents
距離ゲートを用いたホログラフィックレーダおよびホログラフィックレーダセンサ Download PDFInfo
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- JP6208710B2 JP6208710B2 JP2015082011A JP2015082011A JP6208710B2 JP 6208710 B2 JP6208710 B2 JP 6208710B2 JP 2015082011 A JP2015082011 A JP 2015082011A JP 2015082011 A JP2015082011 A JP 2015082011A JP 6208710 B2 JP6208710 B2 JP 6208710B2
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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
- 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
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
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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
- 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
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
- G01S13/18—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein range gates are used
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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
- 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
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
- G01S13/22—Systems for measuring distance only using transmission of interrupted, pulse modulated waves using irregular pulse repetition frequency
- G01S13/225—Systems for measuring distance only using transmission of interrupted, pulse modulated waves using irregular pulse repetition frequency with cyclic repetition of a non-uniform pulse sequence, e.g. staggered PRF
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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
- 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
- G01S13/0209—Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
-
- 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
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/62—Sense-of-movement determination
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- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
本発明は、距離ゲートを導入して、特定の射程に沿った距離に応答を限定することにより、従来技術のホログラフィックレーダの限界を超えるものである。したがって、特に、材料を貫通して画像内の複数の平面または断面まで達した際に、撮像面には、クリアでクラッタに影響されないレーダホログラムが得られる。同様に、距離ゲーティングは、多数の撮像面が射程に沿った方向に積層されうる積層ホログラム技術を可能にする。固体内部の断面のホログラムは、木の断面、人間の器官の断片、および、埋められた墓石のホログラフィック画像のような、ホログラフィックレーダが貫通している地面からの深さ方向の断面を含みうる。
図1は、一実施例に従う距離ゲートを用いたホログラフィックレーダ10を示すブロック図である。PRI(パルス繰り返し間隔)発生器12は、例えば、マイクロ秒毎、などの時間分または時間間隔で繰り返されるパルスを出力する。PRIの逆数は、例えば1MHzのPRF(パルス繰り返し周波数)である。ノイズ発生器13は、PRIを変調することによってRF放射スペクトルを拡散し、他のスペクトルユーザとの間の干渉を抑制する。
Claims (4)
- 距離ゲートを用いたホログラフィックレーダであって、
PRI(パルス繰り返し間隔)の後に繰り返されるPRIパルスを生成するPRI発生器と、
中間周波数変調信号を生成する中間周波数発生器と、
前記PRI発生器及び前記中間周波数発生器に接続されたスタガ変調器と、
前記スタガ変調器によって出力された前記PRIパルスに応答し、前記レーダから所望のターゲットへと伝搬して前記レーダに戻るパルスのエコーの受信と前記パルスの伝送との時間間隔より長い持続時間を有する伝送パルスを、前記PRIパルスのそれぞれに対して生成する第1のパルス発生器と、
前記伝送パルスに応答し、前記伝送パルスの前記持続時間を有するRF信号からなる伝送RFバーストを、前記伝送パルスのそれぞれに対して生成するRF発振器と、
前記RF発振器に接続され、前記伝送RFバーストを放射し、かつ、ターゲットからの前記伝送RFバーストのエコーを受信すると共に、前記RF発振器からの前記伝送RFバーストと受信された前記エコーとの合計によって干渉パターンが生成されるアンテナと、
前記PRI発生器の出力に応答し、距離遅延によって遅延されるPRIパルスを生成する距離遅延手段と、
前記距離遅延によって遅延された前記PRIパルスに応答し、一時的なサンプリング開口を決定する持続時間を有するゲートパルスを生成する第2のパルス発生器と、
前記ゲートパルスに応答し、前記アンテナに接続され、前記ゲートパルスの間に前記干渉パターンのRF振幅サンプルを生成するRF振幅サンプラと、
前記RF振幅サンプルの中間周波数変調成分を通過させる中間周波数バンドパスフィルタと、
前記中間周波数発生器の出力に応答し、フィルタリングした前記RF振幅サンプルを復調すると共に、前記ゲートパルスの間における前記干渉パターンの位相変化及び振幅変化に関する干渉出力信号であって中間周波数で存在する干渉出力信号を生成する中間周波数検出器と、
を備え、
前記スタガ変調器は、
前記中間周波数変調信号の周波数に合わせて、予め決定された数の前記PRIパルスの開始をそれぞれΔTの間隔変動だけオフセットする、
距離ゲートを用いたホログラフィックレーダ。 - 前記RF振幅サンプラは、前記ゲートパルスに基づく1以上のゲート間隔においてRFパルスのピークを検出して積分するゲートRFピーク検出器を備える、
請求項1に記載のホログラフィックレーダ。 - 前記RF振幅サンプラは、第1および第2のRFサンプラを備え、
前記第1および第2のRFサンプラは、前記RF発振器と前記アンテナとの間に接続される伝送ラインにおいて離間したタップに結合され、前記伝送RFバーストと前記エコーとの合計である前記RF振幅サンプルを生成し、かつ、直角位相干渉出力信号を生成する、
請求項1に記載のホログラフィックレーダ。 - 距離ゲートを用いたホログラフィックレーダセンサにおいて、
所定のパルス繰り返し間隔を有するRFバーストを提供するパルスRF発振器であって、予め決定された数の前記RFバーストは所定のIFスタガ周波数の変動ΔTだけずらされ、前記ΔTの間隔変動は前記RFバーストの開始時に形成されると共に前記ΔTの間しか持続せず、前記RFバーストは前記レーダセンサから所望距離の所望ターゲットへと伝搬して前記レーダセンサへと戻るパルスのパルスエコー間隔より長いバースト持続時間を有する、パルスRF発振器と、
前記RFバーストを伝送し、前記RFバーストのエコーを受信すると共に、伝送された前記RFバーストと受信された前記RFバーストの前記エコーとの合計によって中間周波数成分を有する干渉パターンが生成されるアンテナと、
前記干渉パターンの干渉出力サンプルを生成する時間ゲートRFサンプラと、
を備え、
前記干渉出力サンプルは、所定のレーダ距離に対応する所定の時間でサンプリングされると共に、前記中間周波数成分を有し、
前記時間ゲートRFサンプラは、時間ゲートピーク検出器によりRF信号のピークを検出し、前記時間ゲートピーク検出器の出力を積分することによって、出力サンプルを提供する、
距離ゲートを用いたホログラフィックレーダセンサ。
Applications Claiming Priority (2)
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US12/380,324 | 2009-02-26 | ||
US12/380,324 US7952515B2 (en) | 2009-02-26 | 2009-02-26 | Range gated holographic radar |
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JP2011552025A Division JP2012519275A (ja) | 2009-02-26 | 2010-02-22 | 距離ゲートを用いたホログラフィックレーダ |
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JP2015163890A JP2015163890A (ja) | 2015-09-10 |
JP6208710B2 true JP6208710B2 (ja) | 2017-10-04 |
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JP2011552025A Pending JP2012519275A (ja) | 2009-02-26 | 2010-02-22 | 距離ゲートを用いたホログラフィックレーダ |
JP2015082011A Active JP6208710B2 (ja) | 2009-02-26 | 2015-04-13 | 距離ゲートを用いたホログラフィックレーダおよびホログラフィックレーダセンサ |
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US (1) | US7952515B2 (ja) |
EP (1) | EP2401629B1 (ja) |
JP (2) | JP2012519275A (ja) |
KR (1) | KR101238972B1 (ja) |
CN (1) | CN102317809B (ja) |
AU (1) | AU2010218453B2 (ja) |
CA (1) | CA2752515C (ja) |
WO (1) | WO2010098836A2 (ja) |
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2009
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2010
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WO2010098836A3 (en) | 2010-11-25 |
CN102317809B (zh) | 2014-05-14 |
CA2752515A1 (en) | 2010-09-02 |
KR101238972B1 (ko) | 2013-03-04 |
JP2015163890A (ja) | 2015-09-10 |
EP2401629A2 (en) | 2012-01-04 |
US20100214157A1 (en) | 2010-08-26 |
WO2010098836A2 (en) | 2010-09-02 |
CA2752515C (en) | 2015-06-02 |
AU2010218453B2 (en) | 2013-09-26 |
CN102317809A (zh) | 2012-01-11 |
US7952515B2 (en) | 2011-05-31 |
AU2010218453A1 (en) | 2011-08-25 |
JP2012519275A (ja) | 2012-08-23 |
EP2401629B1 (en) | 2016-08-10 |
KR20110129871A (ko) | 2011-12-02 |
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