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1. 发明专利

JP2003194907A APPARATUS AND METHOD FOR ORIENTING LOCATION OF RADIO SOURCE 审中-公开
公开(公告)号：JP2003194907A
公开(公告)日：2003-07-09
申请号：JP2001399879
申请日：2001-12-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： MANIWA HISAKAZU , KIRIMOTO TETSUO , AONO TOMOYUKI
IPC分类号： G01S5/04
摘要： PROBLEM TO BE SOLVED: To provide an apparatus and a method for orienting the location of a radio source with high measurement accuracy by eliminating virtual images without comparing radio waves. SOLUTION: The apparatus for orienting the location of the radio source is provided with a first direction detecting station for receiving radio waves transmitted from the radio source and measuring a first reception bearing including a first angle of elevating and a first azimuth, a second direction detecting station for receiving the radio waves transmitted from the radio source and measuring a second reception bearing including a second angle of elevation and a second azimuth, and a means for computing the location of a point of intersection for computing the point of intersection between azimuth lines of the radio source present within the range of presence of the radio source and the first and second direction detecting stations and determining the location of the radio source. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2003090880A SYNTHETIC APERTURE RADAR DEVICE AND IMAGE REGENERATION METHOD IN SYNTHETIC APERTURE RADAR DEVICE 审中-公开
公开(公告)号：JP2003090880A
公开(公告)日：2003-03-28
申请号：JP2001284923
申请日：2001-09-19
申请人： MITSUBISHI ELECTRIC CORP
发明人： HASEGAWA HIDEKI , IWAMOTO MASAFUMI , KIRIMOTO TETSUO , SHIBATA CHIAKI
IPC分类号： G01S13/90
摘要： PROBLEM TO BE SOLVED: To provide a synthetic aperture radar device reduced in operation quantity by executing range and phase compensation divisionally on a special frequency axis and on a range axis to reduce the number of the following range directional processing points. SOLUTION: This synthetic aperture radar device comprises a range fast Fourier transform (FFT) part 6 for performing FFT of the output of a signal receiving part 5, a reference signal multiplication part 7 for multiplying the output of the FFT part 6 by a high frequency pulse signal from a signal transmission part, a range inverse FFT (IFFT) part 11 for performing IFFT of the output of 7, a signal cutout part 12 for cutting out the output of the range IFFT part in a range direction according to the relative change quantity of the distance to an observation central position, a range FFT part 13 for performing FFT of the output of 12, a range and phase compensation processing part 14 for compensating the change quantity of the residual uncompensated range in this part so that the phase of the echo from the observation central position is a fixed value, a signal interpolation part 9 for arranging the output of 12 on polar coordinates and interpolating a signal on rectangular coordinates thereto, and a two-dimensional IFFT part 10 for performing two-dimensional IFFT of the output of 9 and outputting a two-dimensional high resolution image.

3. 发明专利

JP2002372581A Synthetic aperture radar device 审中-公开
标题翻译：合成孔径雷达装置
公开(公告)号：JP2002372581A
公开(公告)日：2002-12-26
申请号：JP2001181776
申请日：2001-06-15
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HASEGAWA HIDEKI , IWAMOTO MASAFUMI , KIRIMOTO TETSUO , SHIBATA CHIAKI
IPC分类号： G01S13/90
摘要： PROBLEM TO BE SOLVED: To reproduce an image without degrading resolution even in turning while reducing the cost of an antenna control part.
SOLUTION: This synthetic aperture radar device is provided with a transmitting and receiving antenna for irradiating a target with a high frequency pulse signal and receiving an echo signal reflected from the target; a wide band transmitting and receiving means for generating the high frequency pulse signal radiated from the transmitting and receiving antenna and amplifying the received echo signal; a motion sensor for measuring position information that indicates the position of a moving platform; an antenna fixing means for fixing the transmitting and receiving antenna in a specific direction to the moving platform and outputting pulse irradiation direction information; and an image reproducing processing means for processing the echo signal amplified by the wide band transmitting and receiving part, to perform image reproducing processing of the target in consideration of Doppler frequency in an orthogonal direction to the high frequency pulse.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：即使在降低天线控制部件的成本的同时，也不会降低分辨率来再现图像。解决方案：该合成孔径雷达装置设有发射和接收天线，用于以高频脉冲信号照射目标，并接收从目标反射的回波信号; 宽带发送和接收装置，用于产生从发射和接收天线辐射的高频脉冲信号，并放大所接收的回波信号; 用于测量表示移动平台的位置的位置信息的运动传感器; 天线固定装置，用于将发送和接收天线沿特定方向固定到移动平台并输出脉冲照射方向信息; 以及图像再现处理装置，用于处理由宽带发送和接收部分放大的回波信号，以便考虑到与高频脉冲正交的方向的多普勒频率来执行目标的图像再现处理。

4. 发明专利

JP2002267732A METHOD AND DEVICE FOR LOCATING PASSIVE POSITION 失效
公开(公告)号：JP2002267732A
公开(公告)日：2002-09-18
申请号：JP2001068327
申请日：2001-03-12
申请人： MITSUBISHI ELECTRIC CORP
发明人： MANIWA HISAKAZU , IWAMOTO MASAFUMI , KIRIMOTO TETSUO , KOBAYASHI MASAAKI
IPC分类号： G01S5/06
摘要： PROBLEM TO BE SOLVED: To accurately find a signal source position by estimating movement of a signal source together with the signal source position, even when the signal source moves by increase of the number of antennas or the frequency of observations. SOLUTION: This device is provided with plural Doppler frequency difference measuring means 11 for finding a Doppler frequency difference between received signals using as input signals the received signals of the two antennas in combination comprising the two antennas selected from the plural antennas 10, plural signal arrival time difference measuring means 12 for finding an arrival time difference between the received signals using as input signals the received signals of the two antennas in the combination, and a position.movement estimating means A23-1 for estimating the position and the movement of the signal source using as input signals the Doppler frequency difference and the arrival time difference.

5. 发明专利

JP2002214326A TARGET DETECTION DEVICE AND METHOD 失效
公开(公告)号：JP2002214326A
公开(公告)日：2002-07-31
申请号：JP2001005488
申请日：2001-01-12
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUWA HIROSHI , YAMAMOTO KAZUHIKO , IWAMOTO MASAFUMI , KIRIMOTO TETSUO , NONAKA CHIKAFUSA
IPC分类号： G01S7/292 , G01S7/03
摘要： PROBLEM TO BE SOLVED: To solve the problem that the probability of false alarms increases if the scattering characteristic of background clutter varies greatly in terms of space. SOLUTION: This target detection device includes a polarization switch 5 which, during transmission, drives either of two antennas 1 and 2 having mutually perpendicular polarization characteristics and which drives both during reception; an observed scattering vector database 7 for storing the observed scattering vector for each resolution cell serving as the subject of observation; an entropy calculating means 8 for calculating a covariance matrix within the range of a plurality of range cells, near each range cell, for the range profile of the observed scattering vector stored in the database, and for determining the characteristic value of the covariance matrix to calculate an entropy corresponding to each range call; and a target detecting means 9 for detecting a target by comparing the entropy calculated for each range cell to a predetermined threshold. An increase in the probability of false alarms can be prevented when the scattering characteristic of clutter varies greatly in terms of space.

6. 发明专利

JP2002168950A DEVICE AND METHOD FOR DETECTING WAVE SOURCE 失效
公开(公告)号：JP2002168950A
公开(公告)日：2002-06-14
申请号：JP2000366949
申请日：2000-12-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUWA HIROSHI , IWAMOTO MASAFUMI , KIRIMOTO TETSUO , TAKAHASHI RYUHEI , HORIUCHI KENJI
IPC分类号： G01S13/70 , G01S7/292 , G01S13/24
摘要： PROBLEM TO BE SOLVED: To accurately estimate the number of wave source, the position of the wave source and the intensity of the wave source. SOLUTION: This detector is provided with a super-resolution processor 43A for calculating an average correlation matrix based on a received signal incoming from the wave source, for estimating a delay time providing a peak of an amplitude value in an evaluation function to the minimum eigenvalue of the average correlation matrix, and for estimating a complex amplitude of the wave source based on an estimated value of the delay time, to detect the wave source based on the estimated value of the delay time and an estimated value of the complex amplitude, a determination means 439A determining the propriety of the estimated value of the delay time of the wave source and the estimated value of the complex amplitude detected by the processor 43A, and a control means 440A for conducting control for changing a super-resolution processing condition to operate the processor 43A repeatingly until the determination means 439A determines that the estimated value of the delay time of the wave source and the estimated value of the complex amplitude are appropriate.

7. 发明专利

JP2002168936A DEVICE AND METHOD FOR DETECTING WAVE SOURCE 失效
公开(公告)号：JP2002168936A
公开(公告)日：2002-06-14
申请号：JP2000367710
申请日：2000-12-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUWA HIROSHI , IWAMOTO MASAFUMI , KIRIMOTO TETSUO , TAKAHASHI RYUHEI
IPC分类号： G01R29/00 , G01S3/14 , G01S7/292 , G01S7/295 , G01S13/24
摘要： PROBLEM TO BE SOLVED: To restrain intensity of a false image estimated in detection of a wave source. SOLUTION: Reception signals of a wide band coming from the wave source reflecting one or more of pulses of which the transmission frequency ranges over a wide band are accumulated in a memory 41. A super-resolution processor 43 detects the wave source based on a delay time providing a peak of an amplitude value of an evaluation function with respect to the minimum eigenvalue of an average correlation matrix calculated based on the reception signal, and intensity of the wave source based on an estimated value of the lag time, and a false image suppressor 44 conducts weighing to the intensity of the wave source detected by the processor 43 to restrain the false image detected erroneously as the wave source.

8. 发明专利

JP2002048859A RADAR DEVICE FOR TARGET IDENTIFICATION 失效
公开(公告)号：JP2002048859A
公开(公告)日：2002-02-15
申请号：JP2000237011
申请日：2000-08-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUWA HIROSHI , YAMAMOTO KAZUHIKO , KIRIMOTO TETSUO
IPC分类号： G01S7/292
摘要： PROBLEM TO BE SOLVED: To obtain a radar device for target identification which improves the probability that a target can correctly be identified even if the range profiles of targets are similar. SOLUTION: This radar device is equipped with two antennas which have mutually orthogonal polarization characteristics, a polarization switch which switches and drives both the antennas for gathering the scatter matrix of observed objects, and a target identifying means which identifies a target by using scatter matrix range profiles by resolution cells of observed objects observed with multiple polarized waves.

9. 发明专利

JP2001221843A RADAR APPARATUS 失效
公开(公告)号：JP2001221843A
公开(公告)日：2001-08-17
申请号：JP2000030779
申请日：2000-02-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： SUWA HIROSHI , YAMAMOTO KAZUHIKO , KIRIMOTO TETSUO
IPC分类号： G01S7/32 , G01S13/88
摘要： PROBLEM TO BE SOLVED: To obtain a radar apparatus enhanced in detection capacity and anti- stealth performance. SOLUTION: The radar apparatus is equipped with an optimum polarization selection circuit 8 using the principal scattering matrix of clutters and candidate target stored in data bases 12, 13 to make the principal component of the receiving power of the clutter zero and determining transmission polarization for maximizing the principal component of target power and a polarization optimizing circuit 3 performing suppression of the clutter using the determined transmission polarization, the principal scattering matrix of clutters and the scattering matrix for each resolving power cell of an object to be observed stored in a data base.

10. 发明专利

JP2001147264A RADAR PULSE SORTING DEVICE AND RADAR PULSE SORTING METHOD 失效
公开(公告)号：JP2001147264A
公开(公告)日：2001-05-29
申请号：JP2000248491
申请日：2000-08-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： MANIWA HISAKAZU , IWAMOTO MASAFUMI , KIRIMOTO TETSUO
IPC分类号： G01S7/38 , G01S7/295
摘要： PROBLEM TO BE SOLVED: To sort with no need for determining a radar amount with consideration for an erroneous detection pulse and lost detection pulse in advance to prevent deterioration of sorting performance by these pulses. SOLUTION: The radar pulse sorting device, which sorts radar pulses radiated by an unknown number of radars by each radar, comprises a sequential pulse feature extracting means 10 extracting a feature in received radar pulses by each pulse, a hypothesis creating means 12 that adds a hypothesis related to a pulse classification newly obtained to a hypothesis indicating which radar each of received pulses up to now are sorted into and updates the hypothesis to create together with creation of a hypothesis related to a first pulse sorting in case of the first pulse obtained, an evaluation value calculating means 13 calculating the evaluating value of a hypothesis, a hypothesis amount reducing means 15 reducing the hypothesis amount, based on the evaluation value, and a hypothesis selecting means 16 selecting a best hypothesis.

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