JP6874127B2 - 到来方向推定装置、および到来方向推定方法 - Google Patents
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/28—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
- G01S3/32—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics derived from different combinations of signals from separate antennas, e.g. comparing sum with difference
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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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/38—Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal
- G01S3/40—Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal adjusting orientation of a single directivity characteristic to produce maximum or minimum signal, e.g. rotatable loop antenna or equivalent goniometer system
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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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/74—Multi-channel systems specially adapted for direction-finding, i.e. having a single antenna system capable of giving simultaneous indications of the directions of different signals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
- H04B7/0469—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking special antenna structures, e.g. cross polarized antennas into account
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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Description
アンテナに対する信号ソースの位置を示す角度(好ましくは、θ ref 、およびφ ref と名付けられた)の参照値を選ぶために、参照傾き(ρ ref と名付けられた)は、参照ステアリングベクトルとして選ばれるステップ。
Aと名付けられており、3つの上述の角度に依存しており、角度(θ ref 値、およびφ ref 値)の同じ参照値に属するステアリングベクトルは、参照ステアリングベクトルの上に投影されるステップ。
ここで、取得された投影値は所定の値の間隔の範囲内に位置している場合には、ステアリングベクトルは、同じものであるとみなされる。
複数の異なる放射パターンを備える円偏波アンテナを用いて、信号ソースよって発せられた信号を受信するステップと、
受信された信号に基づいて、複数の異なる放射パターンの中の放射パターンに対応することによって受信される分解された信号を供給するステップと、
分解された信号に基づいて、およびアンテナの受信特性を示す情報に基づいて到着方向を推定するステップ。
[1] L.Weisgerber and A.E.Popugaev,“Multibeam antenna array for RFID applications,”in 2013 European Microwave Conference (EuMC), Nuremberg, Germany, Oct. 10−16,2013,pp.84−87.
[2] K.A.Gotsis,K.Siakavara,and J.N.Sahalos,“On the direction of arrival (doa)estimation for a switched-beam antenna System using neural networks,” IEEE Transactions on Antennas and Propagation,vol.57,no.5,pp.1399−1411,May 2009.
[3] W.X.Sheng,J.Zhou,D.G.Fang,and Y.C.Gu,“Super−resolution DOA estimation in switch beam smart antenna,”in Proc.5th Int.Symp.Antennas,Propagation and EM Theory ISAPE 2000,Aug.2000,pp,603−606.
[4] L.Weisgerber and A.E.Popugaev,“Anten na concepts for DoA estimation in traffic scenarios," in Proc.IEEE−APS Topical Conf.Antennas and Propagation in Wireless Communications (APWC),Aug.2014,pp. 423−426.
[5] R.Schmidt,“Multiple emitter location and signal parameter estimation,”IEEE Transactions on Antennas and Propagation,vol. 34,no.3,pp.276−280,Mar. 1986.
[6] Y.Han,Q.Fang,F.Yan,M.Jim,and X.Qiao,“Joint DOA and polarization estimation for unequal power sources based on reconstructed noise subspace,”Journal of Systems Engineering and Electronics,vol.27,no.3,pp.501−513,Jun.2016.
[7] J.Foutz,A.Spanias,and M.K.Banavar,Narrowband Direction of Arrival Estimation for Antenna Arrays,ser.Synthesis Lectures on Antennas #8.Morgan & Claypool, 2008.
Claims (13)
- 到来方向推定装置(1)であって、
アンテナ(2)と、
ビーム形成ネットワーク(3)と、
評価器(4)と、
を備え、
前記アンテナ(2)は、信号を受信するように構成され、
前記アンテナ(2)は、円偏波アンテナであり、
前記アンテナ(2)は、複数の異なる放射パターンを備え、
前記ビーム形成ネットワーク(3)は、前記アンテナ(2)が受信した信号に基づいて、前記複数の異なる放射パターンの中の放射パターンに対応することによって受信される分解された複素信号を供給するように構成され、
前記評価器(4)は、前記分解された複素信号に基づいて、および前記アンテナ(2)の信号受信特性を示す情報に基づいて、到来方向および前記アンテナ(2)に対する信号ソース(10)の傾きを推定するために、前記複数の異なる放射パターンの振幅、および位相応答を用いるように構成され、
前記アンテナ(2)の信号受信特性を示す前記情報は、前記アンテナ(2)が受信する前記信号を発する前記信号ソース(10)の前記アンテナ(2)に対する位置を示す角度(θ、およびφ)に依存するとともに、前記信号ソース(10)の偏波の前記アンテナ(2)に対する傾きを示す角度(ρ)に依存するステアリングベクトルのセット(A)を備えることを特徴とする、到来方向推定装置(1)。 - 前記アンテナ(2)は、右旋円偏波アンテナ、または左旋円偏波アンテナであることを特徴とする、請求項1に記載の到来方向推定装置(1)。
- 前記アンテナ(2)は、複数のアンテナ要素(5)を備え、
複数の前記アンテナ要素(5)の中のアンテナ要素は、異なる放射パターンを備え、
前記ビーム形成ネットワーク(4)は、前記分解された複素信号を供給するように構成されており、それによって、前記分解された複素信号は、個々のアンテナ要素(5)、あるいは少なくとも2つのアンテナ要素(5)の放射パターンの組み合わせで受信されることを特徴とする、請求項1、または請求項2のうちのいずれか1つに記載の到来方向推定装置(1)。 - 複数の前記アンテナ要素(5)の中の前記アンテナ要素(5)は、すべてが、右旋回偏
波しているか、左旋回偏波しているかのうちのいずれかであることを特徴とする、請求項
3に記載の到来方向推定装置(1)。 - 複数の前記アンテナ要素(5)の中の前記アンテナ要素(5)は、平面に位置している
ことを特徴とする、請求項3、または請求項4のうちのいずれか1つに記載の到来方向推
定装置(1) - 前記アンテナ(2)の信号受信特性を示す前記情報は、前記アンテナ(2)に対する前記信号ソース(10)の前記位置を示す仰角(θ)、および方向角(φ)を示すことを特徴とする、請求項1ないし請求項5のうちのいずれか1つに記載の到来方向推定装置(1)。
- 前記アンテナ(2)の信号受信特性を示す前記情報は、前記アンテナ(2)に対する前記信号ソース(10)の傾き(ρ)を示すことを特徴とする、請求項1ないし請求項6のうちのいずれか1つに記載の到来方向推定装置(1)。
- 前記ステアリングベクトルのセット(A)は、前記信号ソース(10)の可能性がある傾き(ρ)の範囲を分割間隔に分割することに基づいていることを特徴とする、請求項1ないし請求項7のうちのいずれか1つに記載の到来方向推定装置(1)。
- 前記分割間隔の幅は、前記信号ソース(10)の傾き(ρ)の推定に対する分析のための寸法であることを特徴とする、請求項8に記載の到来方向推定装置(1)。
- 前記分割間隔は、投影類似度測定に基づいて設定されており、
前記アンテナ(2)に対する前記信号ソース(10)の位置を示す角度(θ ref 、φ ref )の選ばれた参照値、参照傾き(ρ ref )は、参照ステアリングベクトルとして選ばれており、
前記角度(θ ref 、φ ref )の同じ参照値に属するステアリングベクトルは、参照ステアリングベクトル上に投影され、
得られた投影値が所定の値の間隔の範囲内にあるときには、ステアリングベクトルは、同一であると考えられることを特徴とする、請求項8、または請求項9のうちのいずれか1つに記載の到来方向推定装置(1)。 - 前記角度(θ ref 、φ ref )の同じ参照値に属しているステアリングベクトルは、参考ステアリングベクトル上に投影され、および異なる傾き値(ρ)に対して正規化されることを特徴とする、請求項10に記載の到来方向推定装置(1)。
- 前記所定の値の間隔は、1の値の閾値、または、1近傍の値の閾値によって与えられることを特徴とする、請求項10、または請求項11のうちのいずれか1つに記載の到来方向推定装置(1)。
- 複数の異なる放射パターンを備える円偏波アンテナを用いて、信号ソース(10)よって発せられた信号を受信するステップと、
受信された信号に基づいて、前記複数の異なる放射パターンの中の放射パターンに対応することによって受信される分解された複素信号を供給するステップと、
前記分解された複素信号に基づいて、および前記アンテナ(2)の信号受信特性が示す情報に基づいて方向、および前記アンテナ(2)に対する前記信号ソース(10)の傾きを推定するステップと、
を備え、
前記アンテナ(2)の信号受信特性を示す前記情報は、前記アンテナ(2)によって受信された前記信号を発する信号ソース(10)のアンテナ(2)に対する位置を示す角度(θ、およびφ)に依存するとともに、前記アンテナ(2)に対する前記信号ソース(10)の偏波の傾きを示す角度(ρ)に依存するステアリングベクトルのセット(A)を備えることを特徴とする、到来方向推定方法。
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CN103439699B (zh) * | 2013-09-01 | 2015-05-27 | 西安电子科技大学 | 极化mimo雷达到达角和极化角的联合估计方法 |
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CN104122533A (zh) * | 2014-07-29 | 2014-10-29 | 电子科技大学 | 基于分布式极化敏感阵列的参数联合估计方法 |
CN104898085B (zh) * | 2015-05-14 | 2017-11-17 | 电子科技大学 | 一种极化敏感阵列参数估计的降维music算法 |
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US20190372651A1 (en) | 2019-12-05 |
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