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公开(公告)号：EP3835825A1
公开(公告)日：2021-06-16
申请号：EP19846660.9
申请日：2019-06-14
IPC分类号： G01S13/95 , G01S13/524
摘要： A signal processing apparatus (5) that performs signal processing on a Doppler spectrum derived from a reception signal of a reflected wave of pulsed undulation repeatedly transmitted into a space removes a topographic echo spectrum from the Doppler spectrum and extracts a plurality of candidate points of a target echo spectrum from the Doppler spectrum from which the topographic echo spectrum has been removed. Furthermore, the signal processing apparatus (5) determines positional relation between the candidate points and a plurality of removed points of the topographic echo spectrum removed from the Doppler spectrum and extracts as an interpolation point, a point where the target echo spectrum is missing by removal of the topographic echo spectrum based on positional relation between the candidate points and the removed points in a direction of a frequency axis.
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公开(公告)号：EP3367125A1
公开(公告)日：2018-08-29
申请号：EP15906734.7
申请日：2015-10-23
摘要： A line-of-sight (LOS) speed calculator (102) obtains a LOS speed of particles traveling with the atmosphere. A LOS direction corrector (103) corrects a LOS direction using attitude angle information. A wind vector calculator (105) calculates a wind vector expressed with a wind direction and wind speed of the atmosphere by using LOS data including a set of the corrected LOS direction corrected by the LOS direction corrector (103) and the LOS speed obtained by the LOS speed calculator (102).
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公开(公告)号：EP3306340A1
公开(公告)日：2018-04-11
申请号：EP15894071.8
申请日：2015-05-29
CPC分类号： G01S13/931 , G01S7/41 , G01S7/411 , G01S7/415 , G01S13/42 , G01S13/46 , G01S13/582 , G01S13/584 , G01S2013/462 , G01S2013/9346
摘要： A highly accurate object identification is performed. A first feature quantity related to a relative distance and a relative speed to an object, the direction and the reflection intensity of the object, which are extracted by a first feature quantity extraction block (11), is made identical in time series in a data storage processing block (12); a second feature quantity is extracted in a second feature quantity extraction block (13) ; and a category of the object is determined by an object determination block (16) on the basis of an attribution degree to the distribution of the second feature quantity related to a predetermined category calculated by an attribution degree calculation block (14).
摘要翻译： 高度精确的对象识别被执行。 与第一特征量提取块（11）提取的与对象的相对距离和相对速度，对象的方向和反射强度有关的第一特征量在数据中按时间序列相同 存储处理块（12）; 在第二特征量提取块（13）中提取第二特征量; 并且由对象确定块（16）基于由属性度计算块（14）计算的与关于预定类别的第二特征量的分布的属性度来确定对象的类别。
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公开(公告)号：EP4300130A1
公开(公告)日：2024-01-03
申请号：EP22759812.5
申请日：2022-02-25
摘要： There is obtained a data processing device capable of reducing a low frequency component in an input data sequence more as compared with the prior art in a case where the number of data points of the input data sequence is small. The data processing device includes a virtual data sequence generator to extrapolate an approximate line 32 approximating a temporal change of an input data sequence 31 being inputted from outside and is a sequence of data at time points of a predetermined first number that are arranged in succession with at a predetermined time interval to a head or a tail of input data sequence 31 and to generate a virtual data sequence 33 being a sequence of data representing values on extrapolated approximate line 32 at time points of a predetermined second number that are arranged in succession with the time interval, the time points including a time point being adjacent to input data sequence 31, a data sequence connector 9 to generate a processed data sequence 34 being a data sequence in which virtual data sequence 33 is connected to input data sequence 31 on a side where approximate line 32 of input data sequence 21 is extrapolated, an infinite impulse response (IIR) filter 3 to output a data sequence in which a low frequency component is reduced from a data sequence that is inputted, and a data sequence inputter to input data included in processed data sequence 34 to IIR filter 3 sequentially.
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公开(公告)号：EP3358365A1
公开(公告)日：2018-08-08
申请号：EP15905348.7
申请日：2015-09-29
IPC分类号： G01S7/42
CPC分类号： G01S13/95 , G01S7/025 , G01S7/42 , G01S13/581 , Y02A90/18
摘要： A linear-depolarization ratio calculator (12) is configured so as to determine a radar reflectivity factor Z hh in transmission of a horizontally polarized wave and reception of a horizontally polarized wave, the radar reflectivity factor being a reflected wave intensity after integration of a reflected wave intensity V hh (n) calculated by a reflected-wave intensity calculator (11), and a radar reflectivity factor Z vh in transmission of a horizontally polarized wave and reception of a vertically polarized wave, the radar reflectivity factor being a reflected wave intensity after integration of a reflected wave intensity V vh (n+2), and calculate a linear depolarization ratio LDR vh which is the ratio between the radar reflectivity factor Z hh and the radar reflectivity factor Z vh . As a result, even when three types of polarized-wave transmission/reception processing elements are repeatedly performed, the linear depolarization ratio LDR vh can be calculated.
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公开(公告)号：EP3845925A1
公开(公告)日：2021-07-07
申请号：EP19855092.3
申请日：2019-06-14
IPC分类号： G01S13/95
摘要： Based on a reception signal of a reflected wave of pulsed undulation repeatedly transmitted into a space, a Doppler spectrum derived from the reception signal, and a topographic-echo-removed spectrum resulting from removal of a topographic echo from the Doppler spectrum, a first weather echo region is found by using a weather parameter among weather parameters that is different in behavior between a weather echo and the topographic echo, and a second weather echo region is found by using a weather parameter among the weather parameters a behavior of which is not dependent on a Doppler velocity. Alternatively, a weather echo region where a Doppler velocity is zero is found based on the weather parameter, and the weather echo region is determined based on the first weather echo region and the second weather echo region or based on the first weather echo region and the weather echo region where the Doppler velocity is zero. A signal processing apparatus and a signal processing method with which a zero-Doppler weather echo attenuated, that is, erroneously suppressed, by topographic echo removal processing is readily reconstructed are thus obtained.
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公开(公告)号：EP4343385A1
公开(公告)日：2024-03-27
申请号：EP21946946.7
申请日：2021-06-21
IPC分类号： G01S17/95
摘要： A wind speed prediction device (3) is formed, including a scattering signal acquiring unit (11) to acquire a scattering signal that is each of a plurality of beams after being emitted to space and scattered in the space, the beams having mutually different elevation angles, which are angles formed by a line-of-sight direction and a horizontal direction, a Doppler frequency calculating unit (12) to set a range bin width as distance resolution of each of scattering signals acquired by the scattering signal acquiring unit (11) in accordance with an elevation angle of each of the beams emitted to the space, and calculate a Doppler frequency of a range bin corresponding to a two-dimensional plane including an observation region from the each of the scattering signals, a first wind speed distribution estimating unit (13) to estimate a wind speed distribution in the two-dimensional plane from a plurality of Doppler frequencies calculated by the Doppler frequency calculating unit (12) using a VVP method, and a wind speed prediction unit (15) to predict a wind speed in the observation region from the wind speed distribution in the two-dimensional plane estimated by the first wind speed distribution estimating unit (13) using a two-dimensional Navier-Stokes equation.
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公开(公告)号：EP3835822A1
公开(公告)日：2021-06-16
申请号：EP19848005.5
申请日：2019-06-14
摘要： A secondary echo and a primary echo subjected to topographic echo processing are compared with each other. When there is a topographic echo in the primary echo or the secondary echo determined as a strong echo, an echo resulting from removal of the topographic echo is defined as a strong-topographic-echo-removed reception signal. Electric power of the topographic echo in the secondary echo or the primary echo determined as a weak echo and the strong-topographic-echo-removed reception signal are defined as weak echo parameters. Electric power of the weak echo estimated from a reception signal in a weak echo region resulting from phase correction of a reception signal resulting from removal of a frequency component of the strong echo from the strong-topographic-echo-removed reception signal representing the weak echo parameter, a spectral width of the weak echo representing the weak echo parameter, and a Doppler velocity of the weak echo are provided as spectral parameters of the weak echo.
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