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1. 发明授权

US4584580A Apparatus for rejecting jamming waves 失效
标题翻译：用于拒绝干扰波的装置
公开(公告)号：US4584580A
公开(公告)日：1986-04-22
申请号：US477548
申请日：1983-03-21
申请人： Teruhisa Fujino , Kenichi Chiwaki , Sadatoshi Narazaki
发明人： Teruhisa Fujino , Kenichi Chiwaki , Sadatoshi Narazaki
IPC分类号： G01S1/04 , G01S1/24 , H04B1/10 , G01S7/36
CPC分类号： H04B1/1036 , G01S1/045 , G01S1/245 , H04B2001/1063
摘要： A variable-narrow-band rejection filter is inserted in a reception signal path for rejecting a jamming wave. Signals at input and output terminals of the narrow-band rejection filter are picked up by a pair of first and second bandpass filters each having a center frequency that can be passed thereby which is equal to a rejection frequency of the narrow-band rejection filter. A phase difference between outputs from the bandpass filter is detected by a phase comparator, and the detected signal is supplied through a switch to a hold circuit in which the supplied signal is held. The rejection frequency of the narrow-band rejection filter is adjusted into conformity with the jamming wave frequency by an output from the hold circuit. The levels of the output signals from the first and second bandpass filters are detected respectively by a pair of first and second level detectors, and the detected outputs are compared by a comparator. The foregoing switch is kept off as long as the level of the signal at the input terminal of the narrow-band rejection filter is smaller than the level of the signal at the output terminal thereof.
摘要翻译：在接收信号路径中插入可变窄带抑制滤波器以拒绝干扰波。窄带抑制滤波器的输入和输出端子处的信号由一对第一和第二带通滤波器拾取，每个第一和第二带通滤波器具有可以通过的中心频率，其等于窄带抑制滤波器的抑制频率。通过相位比较器检测来自带通滤波器的输出之间的相位差，并且通过开关将检测信号提供给保持所提供的信号的保持电路。通过来自保持电路的输出，将窄带抑制滤波器的抑制频率调整为与干扰波频率一致。分别由一对第一和第二电平检测器检测来自第一和第二带通滤波器的输出信号的电平，并且通过比较器比较检测到的输出。只要窄带抑制滤波器的输入端的信号电平小于其输出端的信号电平，上述开关就被保持关闭。

2. 发明授权

US4395779A Jamming wave rejecting device 失效
标题翻译：干扰波抑制装置
公开(公告)号：US4395779A
公开(公告)日：1983-07-26
申请号：US293642
申请日：1981-08-12
申请人： Teruhisa Fujino , Fujio Osawa , Kenichi Chiwaki , Sadatoshi Narazaki
发明人： Teruhisa Fujino , Fujio Osawa , Kenichi Chiwaki , Sadatoshi Narazaki
IPC分类号： C25B1/28 , C25B11/10 , G01S1/04 , G01S1/24 , H04B1/10 , H04B1/12
CPC分类号： G01S1/245 , G01S1/045 , H04B1/1036
摘要： A narrow-band rejection filter inserted in a received signal path is arranged so that its rejection frequency may be changed by a control signal; the narrow-band rejection filter is controlled so that its rejection frequency may substantially coincide with the center frequency of a jamming wave; thereafter, the phase difference between signals on the input and the output side of the narrow-band rejection filter is detected; and the abovesaid narrow-band rejection filter is controlled by a signal corresponding to the phase difference so that its rejection frequency may automatically coincide with the center frequency of the jamming wave.
摘要翻译： PCT No.PCT / JP79 / 00326 Sec。 371日期1981年8月12日 102（e）日期1981年8月12日PCT提交1979年12月26日PCT公布。公开号WO81 / 01930 日期：1981年7月9日。插入在接收信号路径中的窄带抑制滤波器被布置成使得其抑制频率可以通过控制信号改变; 控制窄带抑制滤波器，使其抑制频率基本上与干扰波的中心频率一致; 之后，检测窄带滤波器的输入和输出侧的信号之间的相位差; 并且上述窄带抑制滤波器由对应于相位差的信号控制，使得其抑制频率可以与干扰波的中心频率自动一致。

3. 发明授权

US4214245A Loran receiving apparatus 失效
标题翻译：罗兰接收设备
公开(公告)号：US4214245A
公开(公告)日：1980-07-22
申请号：US944522
申请日：1978-09-20
申请人： Teruhisa Fujino , Fujio Osawa , Noriaki Nagao , Shigeo Hanji
发明人： Teruhisa Fujino , Fujio Osawa , Noriaki Nagao , Shigeo Hanji
IPC分类号： G01S1/24 , G01S5/10
CPC分类号： G01S1/245 , G01S5/10
摘要： A Loran receiving apparatus is repeatedly switched by the actuation of a display mode changeover means between the state of displaying a plurality of measured time differences on a display in a sequential order and the state of continuously displaying only one of the measured time differences. A Loran signal detector detects a phase code of an incoming Loran signal. The detected phase code is stored in N memory parts, each corresponding to the Loran signal repetition period. Coincidence of the outputs from the memory parts is detected as the presence of a correct Loran signal.
摘要翻译：通过在顺序显示显示多个测量时间差的状态和仅连续显示所测量的时间差之一的状态下通过显示模式转换装置的致动来反复切换罗兰接收装置。 Loran信号检测器检测进入的Loran信号的相位代码。所检测的相位代码被存储在N个存储器部分中，每个对应于Loran信号重复周期。从存储器部分的输出的一致性被检测为存在正确的罗兰信号。

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