JP2014206440A5 - - Google Patents
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- JP2014206440A5 JP2014206440A5 JP2013083787A JP2013083787A JP2014206440A5 JP 2014206440 A5 JP2014206440 A5 JP 2014206440A5 JP 2013083787 A JP2013083787 A JP 2013083787A JP 2013083787 A JP2013083787 A JP 2013083787A JP 2014206440 A5 JP2014206440 A5 JP 2014206440A5
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- 238000005259 measurement Methods 0.000 claims description 25
- 238000005315 distribution function Methods 0.000 claims description 12
- 230000005672 electromagnetic field Effects 0.000 claims description 10
- 230000001902 propagating Effects 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims 2
- 239000011159 matrix material Substances 0.000 claims 2
- 238000001228 spectrum Methods 0.000 claims 2
- 230000000875 corresponding Effects 0.000 claims 1
- 230000002452 interceptive Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
Description
上記課題を解決するために、本発明の第１の形態によると、波源方位推定システムであって、電子機器から離れた一点に設けられて、電波を受信するアンテナと、妨害波の波源方位を推定する波源方位推定装置とを備え、波源方位推定装置は、アンテナによって受信された電磁界多成分の測定を行う測定部と、測定部による測定値に対して、ＭＵＳＩＣ法による信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部とを有する。本発明の第２の形態によると、波源方位推定システムであって、電子機器から離れた一点に設けられて、電波を受信するアンテナと、妨害波の波源方位を推定する波源方位推定装置とを備え、波源方位推定装置は、アンテナによって受信された電磁界多成分の測定を行う測定部と、測定部による測定値に対して、波動分布関数のエントロピーを最大にする信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部とを有する。 In order to solve the above problems, according to a first aspect of the present invention, there is provided a wave source azimuth estimation system, which is provided at a single point away from an electronic device, and includes an antenna for receiving radio waves, and a wave source azimuth of an interfering wave. A wave source azimuth estimation device, and a wave source azimuth estimation device that performs measurement of a multi-component electromagnetic field received by an antenna, and performs signal processing by a MUSIC method on a measurement value by the measurement unit And a wave source direction estimating unit for estimating the wave source direction of the disturbing wave. According to a second aspect of the present invention, there is provided a wave source azimuth estimation system, which is provided at one point away from an electronic device, and that includes an antenna that receives radio waves and a wave source azimuth estimation device that estimates a wave source azimuth of an interfering wave. The wave source azimuth estimation device includes a measurement unit that measures the multi-component electromagnetic field received by the antenna, and performs signal processing that maximizes the entropy of the wave distribution function for the measurement value by the measurement unit, A wave source direction estimating unit for estimating the wave source direction of the disturbing wave.
本発明の第３の形態によると、波源方位推定方法であって、電子機器から離れた一点に設けられたアンテナによって受信された電磁界多成分の測定を行う測定段階と、得られた測定値に対してＭＵＳＩＣ法による信号処理を行って、電子機器からの放射妨害波の波源方位を推定する信号処理段階とを含む。本発明の第４の形態によると、波源方位推定方法であって、電子機器から離れた一点に設けられたアンテナによって受信された電磁界多成分の測定を行う測定段階と、得られた測定値に対して、波動分布関数のエントロピーを最大にする信号処理を行って、電子機器からの放射妨害波の波源方位を推定する信号処理段階とを含む。 According to a third aspect of the present invention, there is provided a measuring method for measuring a multi-component electromagnetic field received by an antenna provided at one point away from an electronic device, and a measured value obtained by the wave source direction estimation method performing signal processing by MUSIC respect, and a signal processing step of estimating a wave source orientation radiated emissions from electronic equipment. According to a fourth aspect of the present invention, there is provided a measuring method for measuring a multi-component electromagnetic field received by an antenna provided at one point away from an electronic device, and a measured value obtained by the wave source direction estimation method And a signal processing step of performing signal processing for maximizing the entropy of the wave distribution function to estimate the source direction of the radiated disturbance wave from the electronic device.
本発明の第５の形態によると、プログラムであって、コンピュータを、電子機器から離れた一点に設けられたアンテナによって受信された電磁界多成分の測定を行う測定部、測定部による測定値に対してＭＵＳＩＣ法による信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部として機能させる。本発明の第６の形態によると、プログラムであって、コンピュータを、電子機器から離れた一点に設けられたアンテナによって受信された電磁界多成分の測定を行う測定部、測定部による測定値に対して、波動分布関数のエントロピーを最大にする信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部として機能させる。 According to a fifth aspect of the present invention , there is provided a program for measuring a multi-component electromagnetic field received by an antenna provided at one point away from an electronic device, and a measurement value by the measurement unit. On the other hand, by performing signal processing by the MUSIC method, it functions as a wave source direction estimation unit that estimates the wave source direction of the disturbing wave. According to a sixth aspect of the present invention, there is provided a program for measuring a multi-component electromagnetic field received by an antenna provided at one point away from an electronic device, and a measurement value by the measurement unit. On the other hand, by performing signal processing that maximizes the entropy of the wave distribution function, it functions as a wave source direction estimation unit that estimates the wave source direction of the disturbing wave.
そしてさらに、本実施の形態の波源方位推定システム１００によれば、波源方位推定部１２２は、自由空間を伝搬する平面電磁波のエネルギー密度に基づいて、放射妨害波の波源数を算出する。従って、波源方位推定システム１００によれば、波源方位推定装置１２０は、高精度で電子機器ＥＤにおける放射妨害波の波源方位を推定できる。 Furthermore, according to the wave source azimuth estimation system 100 of the present embodiment, the wave source azimuth estimation unit 122 calculates the number of wave sources of radiated disturbance waves based on the energy density of the planar electromagnetic wave propagating in free space. Therefore, according to the wave source azimuth estimation system 100, the wave source azimuth estimation device 120 can estimate the wave source azimuth of the radiation disturbance wave in the electronic device ED with high accuracy.
電界の３成分が測定された場合、積分方程式の個数は、Ｎ＝９となる。一般に、逆問題に対する解は無数に存在するが、その全てが物理的に意味のある解ではない。波動分布関数Ｆ（θ、φ）は、波数空間における波導エネルギーの分布を表しているので、滑らかで、至るところ正となる解を求める必要がある。「波動分布関数Ｆ（θ、φ）が未知である。」という状態は、高いエントロピーを持っているといえる。つまり、「波動分布関数Ｆ（θ、φ）を推定する」という作業は、この状態の持つ高いエントロピーを下げる作業であるといえる。従って、エントロピーは、最も効率よく下げられるような分布Ｆ（θ、φ）に推定される。すなわち、推定された分布Ｆ（θ、φ）は、最大となる分布を解として求められる。このようにして得られた解は、予測される最も「ありふれた」分布を表していると解釈できる。波動分布関数Ｆ（θ、φ）のエントロピーＨは、以下の式（１６）で与えられる。 When the three components of the electric field are measured, the number of integral equations is N = 9. In general, there are countless solutions to inverse problems, but not all of them are physically meaningful solutions. Wave distribution function F (θ, φ), since it represents the distribution of the wave guide energy in wave number space, smooth, it is necessary to obtain a positive become solutions everywhere. It can be said that the state “the wave distribution function F (θ, φ) is unknown” has high entropy. That is, it can be said that the operation of “estimating the wave distribution function F (θ, φ)” is an operation of reducing the high entropy of this state. Therefore, the entropy is estimated to have a distribution F (θ, φ) that can be lowered most efficiently. That is, the estimated distribution F (θ, φ) is obtained using the maximum distribution as a solution. The solution thus obtained can be interpreted as representing the most “common” distribution to be predicted. The entropy H of the wave distribution function F (θ, φ) is given by the following equation (16).
Claims (10)
妨害波の波源方位を推定する波源方位推定装置と
を備え、
前記波源方位推定装置は、
前記アンテナによって受信された電磁界多成分の測定を行う測定部と、
前記測定部による測定値に対して、ＭＵＳＩＣ法による信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部と
を有する波源方位推定システム。 An antenna that is provided at one point away from the electronic device and receives radio waves;
A source direction estimation device for estimating the source direction of the jamming wave,
The wave source direction estimating device is:
A measurement unit for measuring an electromagnetic field multi-component received by the antenna;
Wherein the measurement value by the measurement unit, by performing signal processing by MUSIC, wave source direction estimation system having a wave source direction estimation unit that estimates a wave source orientation disturbance.
請求項１に記載の波源方位推定システム。 The wave source azimuth estimation unit creates a spectrum matrix based on the measurement value, obtains a relationship between frequency and energy, calculates an eigenvalue and an eigenvector from the spectrum matrix, and uses the calculated eigenvalue and eigenvector to radiate an interference wave The number of wave sources is calculated, the evaluation function is calculated using the eigenvector corresponding to the minimum eigenvalue, the peak of the evaluation function is taken as many as the number of wave sources, and the direction at that time is obtained. The wave source direction estimation system according to claim 1.
請求項１又は２に記載の波源方位推定システム。 The wave source direction estimation system according to claim 1, wherein the wave source direction estimation unit calculates the number of wave sources of the radiation disturbance wave based on an energy density of a planar electromagnetic wave propagating in free space.
請求項１又は２に記載の波源方位推定システム。 The wave source direction estimation system according to claim 1, wherein the wave source direction estimation unit evaluates the wave source of the radiation disturbance wave as a wave distribution function.
妨害波の波源方位を推定する波源方位推定装置とSource direction estimation device for estimating source direction of jamming wave and
を備え、With
前記波源方位推定装置は、The wave source direction estimating device is:
前記アンテナによって受信された電磁界多成分の測定を行う測定部と、A measurement unit for measuring an electromagnetic field multi-component received by the antenna;
前記測定部による測定値に対して、波動分布関数のエントロピーを最大にする信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部とA signal source direction estimation unit that estimates the source direction of the disturbing wave by performing signal processing that maximizes the entropy of the wave distribution function with respect to the measurement value by the measurement unit;
を有する波源方位推定システム。A wave source azimuth estimation system.
請求項５に記載の波源方位推定システム。The wave source direction estimation system according to claim 5.
得られた測定値に対して、ＭＵＳＩＣ法による信号処理を行って、前記電子機器からの放射妨害波の波源方位を推定する信号処理段階と
を含む波源方位推定方法。 A measurement stage for measuring an electromagnetic multi-component received by an antenna provided at one point away from an electronic device;
A signal processing direction estimation method comprising: a signal processing step of performing signal processing on the obtained measurement value by a MUSIC method to estimate a source direction of a radiated disturbance wave from the electronic device.
得られた測定値に対して、波動分布関数のエントロピーを最大にする信号処理を行って、前記電子機器からの放射妨害波の波源方位を推定する信号処理段階とA signal processing stage for performing signal processing for maximizing the entropy of the wave distribution function on the obtained measurement value to estimate the source direction of the radiated disturbance wave from the electronic device;
を含む波源方位推定方法。Source direction estimation method including
電子機器から離れた一点に設けられたアンテナによって受信された電磁界多成分の測定を行う測定部、
前記測定部による測定値に対して、ＭＵＳＩＣ法による信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部
として機能させるプログラム。 Computer
A measuring unit for measuring multi-component electromagnetic fields received by an antenna provided at one point away from an electronic device;
The measurement values by the measurement unit, by performing signal processing by MUSIC, programs to function as the wave source direction estimation unit that estimates a wave source orientation disturbance.
電子機器から離れた一点に設けられたアンテナによって受信された電磁界多成分の測定を行う測定部、A measuring unit for measuring multi-component electromagnetic fields received by an antenna provided at one point away from an electronic device;
前記測定部による測定値に対して、波動分布関数のエントロピーを最大にする信号処理を行うことにより、妨害波の波源方位を推定する波源方位推定部A source direction estimator that estimates the source direction of the disturbing wave by performing signal processing that maximizes the entropy of the wave distribution function for the measurement value obtained by the measurement unit.
として機能させるプログラム。Program to function as.
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