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1. 发明专利

JP2010249535A Radar device 有权
标题翻译：雷达设备
公开(公告)号：JP2010249535A
公开(公告)日：2010-11-04
申请号：JP2009096161
申请日：2009-04-10
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HARASAWA YASUHIRO
IPC分类号： G01S13/528 , G01S7/02 , G01S7/292
摘要： PROBLEM TO BE SOLVED: To provide a radar device with which a target blind speed region generated by MTI to perform a clutter restriction process is reduced by radio wave transmission.
SOLUTION: A transmitter 3 sequentially switches transmission frequency of a pulse signal to f
1 -f
3 in time division manner. Reflection waves of radio waves emitted at each transmission frequency are received by an antenna 1 and then phase-detected by a receiver 5 to be a reception processed signal. A frequency selection means 8 performs peak detection or threshold detection processing to each of output signals of an MTI processing means 7 at the transmission frequencies f
1 -f
3 to detect a target. The frequency selection means 8 selects a reception processed signal including a target signal among the plurality of reception processed signals as a measurement object signal. Based on the measurement object signal from the frequency selection means 8, target detection processing and distance measurement processing are performed, and the distance to a target is measured.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种通过无线电波传输减少由MTI产生的目标盲速度区域以执行杂波限制处理的雷达装置。解决方案：发射机3以时分方式顺序地将脉冲信号的发送频率切换为f 1 -f 3 。在每个发送频率处发射的无线电波的反射波由天线1接收，然后被接收机5相位检测为接收处理信号。频率选择装置8以传输频率f 1 3 对MTI处理装置7的每个输出信号执行峰值检测或阈值检测处理，以检测目标。频率选择装置8在多个接收处理信号中选择包括目标信号的接收处理信号作为测量对象信号。基于来自频率选择装置8的测量对象信号，执行目标检测处理和距离测量处理，并且测量到目标的距离。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JP2006284549A Clutter suppressor 有权
标题翻译： CLUTTER SUPPRESSOR
公开(公告)号：JP2006284549A
公开(公告)日：2006-10-19
申请号：JP2005257867
申请日：2005-09-06
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HARASAWA YASUHIRO , SEKIGUCHI TAKASHI
IPC分类号： G01S7/292
摘要： PROBLEM TO BE SOLVED: To prevent a clutter from being left unerasedly, without attenuating a target signal. SOLUTION: This suppressor includes a clutter suppressing part 4 for calculating a filter coefficient forming a zero point in the center frequency of a clutter, and for suppressing the clutter contained in a reception signal of a pulse radar, using the filter coefficient, and clutter suppressing parts 7-1 to 7-N for calculating a filter coefficient forming a zero point in the center frequency added with an off-set frequency, and for suppressing the clutter contained in an output signal from the clutter suppressing part 4, using the filter coefficient, electric powers of output signals from the clutter suppressing parts 4, 7-1 to 7-N are compared with an electric power threshold value, and the output signals from the clutter suppressing parts 4, 7-1 to 7-N are selected in response to a comparison result to be output. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了防止杂波不被遗漏，而不会衰减目标信号。解决方案：该抑制器包括：杂波抑制部分4，用于计算在杂波的中心频率中形成零点的滤波器系数，并且使用滤波器系数来抑制脉冲雷达的接收信号中包含的杂波; 以及用于计算在添加有偏移频率的中心频率中形成零点的滤波器系数并且用于抑制来自杂波抑制部分4的输出信号中包含的杂波的杂波抑制部分7-1至7-N，使用滤波器系数，来自杂波抑制部分4,7-1至7-N的输出信号的电功率与电功率阈值进行比较，并且来自杂波抑制部分4,7-1至7-N的输出信号响应于要输出的比较结果来选择。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JPH1188208A SIDE LOBE CANCELLER 失效
公开(公告)号：JPH1188208A
公开(公告)日：1999-03-30
申请号：JP18767598
申请日：1998-07-02
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIRATA KAZUFUMI , KAWAAI TAKASHI , HARASAWA YASUHIRO
IPC分类号： H01Q3/26 , H01Q25/02 , H03H21/00 , H04B1/10 , H04B7/005 , H04B7/08
摘要： PROBLEM TO BE SOLVED: To suppress plural interference waves and to reduce a producing cost through the use of only two element antenna by outputting a sum signal and a difference signal from the received signals of two antennas so as to output a difference signal between a sum signal by way of an amplitude equalizing means and the output signal of an adaptive filter. SOLUTION: An array antenna 11 consisting of plural element antennas outputs the sum signal of the received signal of the two antennas to an adding means 4 and the difference signal to a subtracting means 5. A pair of amplitude equalizing means 6a and 6b respectively connected with the means 4 and 5 are respectively provided with the amplitude of interference wave components included in the sum signal and the difference signal. The adaptive filter 20 obtains a load to weight to a difference signal based on the inputs of the difference signal of the means 5 and a difference signal by way of the means 6b, and outputs a signal obtained by loading to the difference signal. A subtracting means 10 outputs a difference signal between a sum signal by way of the means 6a and the output signal of the filter 20.

4. 发明专利

JPH1146112A INTERFERENCE WAVE SUPPRESSION DEVICE 失效
公开(公告)号：JPH1146112A
公开(公告)日：1999-02-16
申请号：JP19899897
申请日：1997-07-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： HARASAWA YASUHIRO , KIRIMOTO TETSUO
IPC分类号： H01Q3/26 , H03H21/00
摘要： PROBLEM TO BE SOLVED: To obtain the interference suppression device with a high speed interference wave suppression characteristic without increasing the scale of hardware by adjusting the initial value of board of an adaptive filter in response to the state of a received interference wave in the adaptive algorithm based on the method of steepest descent where the amount of arithmetic operations required for one load update is small. SOLUTION: The device is provided with a beam forming means 5 that receives part or all of output signals from plural antenna elements 1 to form a beam in a prescribed direction, a discrete Fourier transform device 11 that receives reception signals of plural antenna elements 1 and forms an auxiliary beam in the arrival direction of interference wave, an adaptive filter 16 that receives an output signal of the discrete Fourier transform device 11, a board initial value adjustment means 10 that adjusts the initial load value of the adaptive filter based on a direction direction of the auxiliary beam, and a load calculation means 9 that uses a load transferred from the load initial value adjustment means 10 as an initial value to update the load based on the adaptive algorithm.

5. 发明专利

JPH1138120A METHOD AND DEVICE FOR SUPPRESSING UNNECESSARY SIGNAL 失效
公开(公告)号：JPH1138120A
公开(公告)日：1999-02-12
申请号：JP19549997
申请日：1997-07-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： HARASAWA YASUHIRO , KIRIMOTO TETSUO
IPC分类号： G01S7/32
摘要： PROBLEM TO BE SOLVED: To stably detect a target even when a clutter largely fluctuates along the distance direction. SOLUTION: When an adaptive filter 5 filtrates signals related to processing range bins 2, a load calculating means 4 sets the load used by the filter 5 based on received signals related to load calculating range bins 3a and 3b at prescribed distances or longer from the processing range bin 2 and a received signal related to the range bin 2 selected by means of a noise data selecting means 6. Since the signal related to the range bin 2 selected by means of the selecting means 6 is added as pseudo noise at the time of calculating the load, the influences of null to notch associated with the amplitude fluctuation of a clutter along the distance direction are reduced and the output of the filter 5 is stabilized.

6. 发明专利

JPH07239378A UNDESIRED SIGNAL SUPPRESSOR 失效
公开(公告)号：JPH07239378A
公开(公告)日：1995-09-12
申请号：JP2947594
申请日：1994-02-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： HARASAWA YASUHIRO , KIRIMOTO TETSUO , YOSHIKURA HIDEAKI
IPC分类号： G01S7/292 , G01S7/32 , G01S13/534
摘要： PURPOSE:To improve the performance of suppressing undesired signals by using a received signal obtained by beam scanning made a plurality of times. CONSTITUTION:A signal from a radar receiver is ramified and inputted into a lattice filter 50a as forward forecast error signal and backward forecast error signal to perform a computation with a reflection coefficient denominator calculating means 55a and a reflection coefficient numerator calculating means 56a. The results of calculation are stored by memory means 2a and 2b. A scan counter 3a counts the frequency of scanning and transfers the number thereof to the memory means 2a and 2b. When the frequency of the scanning does not reach any value settable, data are not outputted from the memory means 2a and 2b and held therein. When the frequency of the scanning reaches the value, the data saved in the memory means 2a and 2b are transferred to adders 4a and 4b to add up. Outputs of the adders 4a and 4b are transferred to a multiplier 5a to determine a reflection coefficient by a computation.

7. 发明专利

JPH04297883A SIDE LOBE CANCELER 失效
公开(公告)号：JPH04297883A
公开(公告)日：1992-10-21
申请号：JP4351191
申请日：1991-03-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： HARASAWA YASUHIRO , KIRIMOTO TETSUO , OHASHI YOSHIMASA
IPC分类号： G01S7/02 , H01Q3/26
摘要： PURPOSE:To reduce concurrent suppression of a desired wave in a side lobe canceler output when the number of received interference waves is smaller than the number of auxiliary antennas and a power of the desired wave in the auxiliary antennas is large relatively and can not be neglected in comparison with the power of the received interference waves. CONSTITUTION:A side lobe canceler conducts an adaptive signal processing of output signals of receives in the number of N from a first one to an N+1 one connected to a main antenna 1 and auxiliary antennas 2a, 2b in the number of N, by using a Gram-Schmidt orthogonalization process, and thereby suppresses received interference waves. A control means 10 which switches 9 the number of the auxiliary antennas in accordance with the number of the received interference waves on the basis of an average power ratio of an input signal to an output signal of an adaptive block in the last column of each row of adaptive blocks 8a to 8c constituting a means of the orthogonalization process is provided, and attenuation of a desired wave in a side lobe canceler output is reduced by this constitution.

8. 发明专利

JP2012118040A Radar device 有权
标题翻译：雷达设备
公开(公告)号：JP2012118040A
公开(公告)日：2012-06-21
申请号：JP2011083650
申请日：2011-04-05
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HARASAWA YASUHIRO , HARA TERUYUKI , UCHIDA KOJI
IPC分类号： G01S13/52 , G01S7/292
摘要： PROBLEM TO BE SOLVED: To achieve both of a clutter suppression performance and a target signal preservability.SOLUTION: A radar device includes a transmitter-receiver circuit 1 having a transmission-reception antenna, a plurality of FIR filters 2 for inputting reception signals input from the transmitter-receiver circuit 1 and suppressing clutter from among the reception signals, a plurality of FFT means 3 for fourier-transforming an output signal of each FIR filter 2, FFT output selection means 4 for selecting a FFT output result used for a target signal detection from among the output of the FFT means 3, a plurality of target detection means 5 for detecting target signals by using the output result of the FFT output selection means 4, a display means 6 for displaying a target detection result, and a switching frequency database 7 for storing a switching frequency used for selecting a FFT output result by the FFT output selection means 4. Amplitude characteristics of the FIR filers 2 are all different from one another. The FFT output selection means 4 switches the outputs of the FFT means 3 so as to use the output of the FIR filer 2 with the highest amplitude gain.
摘要翻译：要解决的问题：实现杂波抑制性能和目标信号保存性两者。解决方案：雷达装置包括具有发射接收天线的发射机 - 接收机电路1，用于输入从发射机 - 接收机电路1输入的接收信号和从接收信号中抑制杂波的多个FIR滤波器2，多个FFT装置3，用于对每个FIR滤波器2的输出信号进行四路变换; FFT输出选择装置4，用于从FFT装置3的输出中选择用于目标信号检测的FFT输出结果;多个目标检测用于通过使用FFT输出选择装置4的输出结果来检测目标信号的装置5，用于显示目标检测结果的显示装置6和用于存储用于选择FFT输出结果的开关频率的开关频率数据库7 FFT输出选择装置4. FIR滤波器2的振幅特性彼此不同。 FFT输出选择装置4切换FFT装置3的输出，以便使用具有最高幅度增益的FIR滤波器2的输出。版权所有（C）2012，JPO＆INPIT

9. 发明专利

JP2011185752A Pulse radar device 审中-公开
标题翻译：脉冲雷达装置
公开(公告)号：JP2011185752A
公开(公告)日：2011-09-22
申请号：JP2010051491
申请日：2010-03-09
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HARASAWA YASUHIRO
IPC分类号： G01S13/534
摘要： PROBLEM TO BE SOLVED: To obtain a pulse radar device capable of reducing attenuation of a target signal caused by an amplitude characteristic of a filter, while keeping clutter suppression performance near MTI (Moving Target Indicators), by widening a passing band width by adding a new term to a transfer function of an MTI filter. SOLUTION: This device includes: a transmission/reception processing circuit 100 for transmitting/receiving a pulse radio wave, and generating a reception signal x; a passing band width control type clutter suppression means for setting variably a filter passing band width to pass the reception signal; and a target detection means for performing target detection processing to an output signal from the passing band width control type clutter suppression means, and performing feedback input of a detection result into the passing band width control type clutter suppression means. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了获得能够减少由滤波器的振幅特性引起的目标信号衰减的脉冲雷达装置，同时通过加宽通过频带宽度，同时保持MTI（移动目标指示器）附近的杂波抑制性能通过向MTI过滤器的传递函数添加一个新项。解决方案：该装置包括：发送/接收脉冲无线电波并产生接收信号x的发送/接收处理电路100; 通过带宽控制型杂波抑制装置，用于可变地设置滤波器通过带宽以通过接收信号; 以及目标检测装置，用于对来自通带宽度控制型杂波抑制装置的输出信号执行目标检测处理，并且将检测结果的反馈输入执行到通带宽度控制型杂波抑制装置中。版权所有（C）2011，JPO＆INPIT

10. 发明专利

JP2010060353A Radar system 审中-公开
标题翻译：雷达系统
公开(公告)号：JP2010060353A
公开(公告)日：2010-03-18
申请号：JP2008224394
申请日：2008-09-02
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HARASAWA YASUHIRO
IPC分类号： G01S13/52 , G01S13/524 , G01S13/526
摘要： PROBLEM TO BE SOLVED: To obtain a radar system for preventing a clutter from lingering by estimating a clutter center frequency corrected in a Doppler frequency when there occurs the folding of the Doppler frequently of the clutter.
SOLUTION: The radar system includes: a clutter estimating data extraction means 1 for extracting a signal for estimating the number of clutters and a center frequency from a reception signal of a pulse radar; a clutter number determination means 2 for estimating the number of clutters received from the extracted signal; a switch 3 for switching contents of clutter suppression carried out from results of determination of the number of clutters; a folding-corrected clutter center frequency estimation means 4 for using the extracted signal and results of determining the number of clutters and estimating the clutter center frequency by avoiding an estimation error occurring when the frequency folding of the clutter takes place; and a clutter suppression part 5 in which processing contents are determined depending on the number of clutters by the switch, the clutter center frequency estimation value transferred from the folding-corrected clutter center frequency estimation means is inputted and the clutter in the reception signal is suppressed.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了获得用于通过估计当频繁出现杂波的多普勒的折叠时通过估计在多普勒频率中校正的杂波中心频率来获得用于防止杂波滞后的雷达系统。解决方案：雷达系统包括：杂波估计数据提取装置1，用于从脉冲雷达的接收信号中提取用于估计杂波数的信号和中心频率; 杂波数确定装置2，用于估计从提取的信号接收的杂波数; 用于切换杂波抑制的内容的开关3，用于确定杂波数的结果; 折叠校正的杂波中心频率估计装置4，用于通过避免当发生杂波的频率折叠时发生的估计误差，使用提取的信号和确定杂波数的结果和估计杂波中心频率; 以及杂波抑制部分5，其中处理内容根据开关的杂波数确定，从折叠校正杂波中心频率估计装置传送的杂波中心频率估计值被输入，并且接收信号中的杂波被抑制。版权所有（C）2010，JPO＆INPIT

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