JP7440131B2 - 生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去方法及びその装置 - Google Patents
生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去方法及びその装置 Download PDFInfo
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- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
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- 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
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- G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
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- G—PHYSICS
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- 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
- G01S7/28—Details of pulse systems
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- G01S7/292—Extracting wanted echo-signals
- G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
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- 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
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- 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
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- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
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- A61B5/7253—Details of waveform analysis characterised by using transforms
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Description
Claims (4)
- 生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去方法であって、
(a)IF信号生成器の電圧制御発振部(VCO)において外部から印加された電圧(V(t))にて所定の周期の発振周波数を有する信号を連続的に生成して、単一の送信アンテナを介して動的ターゲットの主な部位に送出し、前記動的ターゲットから反射された信号と前記動的ターゲットの周りにおいて生じた各種の信号をn個(nは2以上の整数)の受信アンテナにおいて受信するステップと、
(b)前記IF信号生成器は、前記発信周波数を有する信号と受信されたn個の信号との差分からそれぞれドップラIF信号を生成するステップと、
(c)アナログ/デジタル変換器が、前記IF信号生成器から入力された複数のドップラIF信号をそれぞれのデジタルデータに変換するステップと、
(d)前記アナログ/デジタル変換器(20)において単位時間の間に収集されたデジタル信号を高速フーリエ変換器においてサンプリング時間間隔にてシンボルを有するデータ列として構成し、前記データ列を複数のインデックス(Index)の周波数成分シンボル列(symbol set)に切り換えるステップと、
(e)信号演算器の演算部において前記周波数成分シンボル列に切り換えられたインデックスシンボルを各インデックス列に加算して、n個の受信アンテナの数で割った値を演算するステップと、
(f)前記演算部において演算された値に対して共通して生じる周期的な信号と共通的ではない非周期的な信号とのスペクトル成分の偏差を所定の基準のしきい(Threshold)値に応じて分類して周期的な信号のみをフィルタリングするステップと、
を含み、
前記周波数成分シンボル列のシンボルデータはスペクトルの強さを示す、生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去方法。 - 生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去装置であって、
電圧制御発振部(Voltage Controlled Oscillator;VCO)において外部から印加された電圧(V(t))にて所定の周期の発振周波数を有する信号を連続的に生成して単一の送信アンテナ(Tx)から送出し、所定の距離の動的ターゲットを有するレーダ信号収集領域から反射された反射波を複数の受信アンテナ(Rx-1~Rx-n)(nは2以上の整数)においてそれぞれ受信し、前記発信周波数を有する信号と受信されたn個の信号との差分からそれぞれドップラIF信号を生成するIF信号生成器と、
前記IF信号生成器において生成されたn個のアナログ信号をデジタル信号に変換するアナログ/デジタル変換器と、
前記アナログ/デジタル変換器において単位時間の間に収集されたデジタル信号を高速フーリエ変換器においてサンプリング時間間隔にてシンボルを有するデータ列として構成し、構成された前記データ列をインデックス(Index)の周波数成分シンボル列(symbol set)に切り換えた後、演算部においてインデックスシンボルを各インデックス列に加算して、n個の受信アンテナ(Rx)の数で割った値を求める信号演算器と、
前記信号演算器において求めた値に対して共通して生じる周期的な信号と共通的ではない非周期的な信号とのスペクトル成分の偏差を所定の基準のしきい(Threshold)値に応じて分類してフィルタリングするデジタルフィルタリング信号処理器と、
を備え、
前記周波数成分シンボル列のシンボルデータはスペクトルの強さを示す、生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去装置。 - 前記受信アンテナ(Rx-1~Rx-n)は、動的ターゲットとそれ以外の領域から同時に信号を受信できる位置及び方向に並べられた、請求項2に記載の生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去装置。
- 前記デジタルフィルタリング信号処理器は、基準しきい値にてフィルタリングするために所定の帯域のバンドパスフィルタ(BPF)や高域パスフィルタ(HPF)または低域パスフィルタ(LPF)のいずれか一つが適用される、請求項2に記載の生体信号測定用のレーダにおけるレーダ収集信号のランダムノイズの除去装置。
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KR1020190143162A KR102122758B1 (ko) | 2019-11-11 | 2019-11-11 | 생체신호 측정용 레이더에서 레이더 수집신호의 랜덤노이즈 제거방법 및 그 장치 |
KR10-2019-0143162 | 2019-11-11 | ||
PCT/KR2019/015255 WO2021095893A1 (ko) | 2019-11-11 | 2019-11-11 | 생체신호 측정용 레이더에서 레이더 수집신호의 랜덤노이즈 제거방법 및 그 장치 |
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JP2023502177A (ja) | 2023-01-20 |
KR102122758B1 (ko) | 2020-06-26 |
CN114667094A (zh) | 2022-06-24 |
US20220381877A1 (en) | 2022-12-01 |
WO2021095893A1 (ko) | 2021-05-20 |
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