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公开(公告)号：US5631838A
公开(公告)日：1997-05-20
申请号：US614941
申请日：1996-03-11
CPC分类号： G01S19/20
摘要： A length of time required for the verification of data transmitted from a satellite or satellites is reduced. A distance r1 calculated from a time delay required for the propagation of a radio wave between a transmitting and a receiving site is obtained, as is a line-of-sight distance r2 which is calculated from the positions of a satellite and a point of reception. When a difference between these two distances is small, data from these satellites are regarded as valid data. However, when the difference is large, data is regarded as involving a large error. The position of the point of reception is determined by a positioning calculation which utilizes data from predetermined three or four verified satellites, or is entered by an operator. The position of the satellite is obtained from orbital data which is delivered by that satellite.
摘要翻译： 从卫星或卫星发送的数据的验证所需的时间缩短。 从发送和接收站点之间的无线电波传播所需的时间延迟计算的距离r1也是从卫星和接收点的位置计算的视距离r2 。 当这两个距离之间的差异小时，来自这些卫星的数据被视为有效数据。 然而，当差异较大时，数据被认为涉及大的误差。 接收点的位置由使用来自预定的三个或四个已验证的卫星的数据或由操作者输入的定位计算来确定。 卫星的位置是由该卫星传送的轨道数据获得的。
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公开(公告)号：US08050370B2
公开(公告)日：2011-11-01
申请号：US12270394
申请日：2008-11-13
申请人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
发明人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
IPC分类号： H04B1/10
CPC分类号： H04B1/123
摘要： A digital signal receiving apparatus includes a detection-judging portion having a first smoothing filter generating a first smoothed signal by smoothing an auto-correlation signal and judging a possible presence of a desired signal when a signal level of the first smoothed signal is greater than a reference level and an absence of the desired signal when being smaller than the reference level. The smoothing filter includes a limiting portion limiting a fluctuation width of the first smoothed signal; and an adjusting portion configured to adjust the fluctuation width of the first smoothed signal limited by the limiting portion to be reduced while an elapsing time after the detection-judging means judges the possible presence of the desired signal is increasing.
摘要翻译： 一种数字信号接收装置，包括具有第一平滑滤波器的检测判断部分，该第一平滑滤波器通过平滑自相关信号产生第一平滑信号，并且当第一平滑信号的信号电平大于一个信号时判断期望信号的可能存在 参考电平和当小于参考电平时缺少所需信号。 平滑滤波器包括限制第一平滑信号的波动宽度的限制部分; 以及调整部，其被配置为在检测判断装置判断出所需信号的可能存在之后的经过时间时，调整受限制部分限制的第一平滑信号的波动宽度的减小。
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公开(公告)号：US20090129510A1
公开(公告)日：2009-05-21
申请号：US12270416
申请日：2008-11-13
申请人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
发明人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
摘要： A frequency shift keying digital signal receiving apparatus includes a detecting portion detecting a new signal on the basis of a signal, from which a correlated ambient noise is filtered out by an adaptive filter, a holding portion holding a first electric power for the signal received before a new signal is detected, a calculating portion calculating a second electric power for the signal received after the new signal is detected, a comparing portion comparing levels of the first and second electric powers, a selector selecting the signal, from which the correlated ambient noise is filtered out, when the first electric power is higher than the second electric power and selecting the signal bypassing the adaptive filter when the first electric power is lower than the second electric power, and a demodulating portion demodulating a desired signal on the basis of the signal selected by the selecting portion.
摘要翻译： 频移键控数字信号接收装置包括：检测部，其基于由自适应滤波器滤除相关的环境噪声的信号，检测新信号;保持部，其对于接收到的信号之前保持第一电力 检测到新的信号，计算部分，对于检测到新信号之后接收到的信号计算第二电力，比较部分，比较第一和第二电力的电平;选择器，选择信号，相关环境噪声 被滤出，当第一电力高于第二电力时，并且当第一电力低于第二电力时选择旁路自适应滤波器的信号，以及解调部分，基于 信号由选择部分选择。
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公开(公告)号：US5402441A
公开(公告)日：1995-03-28
申请号：US108079
申请日：1993-08-17
申请人： Koichi Washizu , Toshihiro Kawazoe , Yorihisa Suwa , Yukio Yokoi , Chogo Sekine , Tomio Yasuda , Toshimitsu Oka , Yuichi Murakami , Tomohiro Yamamoto , Seiji Ishikawa
发明人： Koichi Washizu , Toshihiro Kawazoe , Yorihisa Suwa , Yukio Yokoi , Chogo Sekine , Tomio Yasuda , Toshimitsu Oka , Yuichi Murakami , Tomohiro Yamamoto , Seiji Ishikawa
CPC分类号： G01S19/22
摘要： A GPS signal receiver has a PN code generator for producing a PN code identical to a PN code in a received GPS signal which is transmitted from a GPS satellite, the PN code produced by the PN code generator being controllable in phase, a PN code correlator for correlating the received GPS signal with the PN code produced by the PN code generator so as to code-strip the received GPS signal, a signal search unit for monitoring a correlated output signal from the PN code correlator and controlling the phase of the PN code produced by the PN code generator to search for a correlated output signal in excess of a predetermined value, a signal determining unit for determining the correlated output signal in excess of the predetermined value as being produced by a direct wave of the GPS signal, and a signal tracking unit for controlling the phase of the PN code produced by the PN code generator to track a peak of the correlated output signal that is determined as being produced by the direct wave of the GPS signal.
摘要翻译： GPS信号接收机具有用于产生与从GPS卫星发送的接收的GPS信号中的PN码相同的PN码的PN码发生器，由PN码发生器产生的PN码同相控制，PN码相关器 用于将所接收的GPS信号与由PN码发生器产生的PN码相关联，以便对所接收的GPS信号进行编码;信号搜索单元，用于监视来自PN码相关器的相关输出信号并控制PN码的相位 由PN码发生器产生的用于搜索超过预定值的相关输出信号的信号确定单元，用于确定由GPS信号的直接波产生的超过预定值的相关输出信号，以及 信号跟踪单元，用于控制由PN码发生器产生的PN码的相位，以跟踪被确定为由直接w产生的相关输出信号的峰值 ave的GPS信号。
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公开(公告)号：US20050058232A1
公开(公告)日：2005-03-17
申请号：US10937773
申请日：2004-09-10
CPC分类号： B60R25/24 , B60R25/2072 , H04L2025/03394 , H04L2025/03496
摘要： A digital receiving device includes a detecting means for detecting a specific code under a signal receiving state capable of successively receiving a desired signal, a setting means for setting a period for detecting the specific code as a non-communication state period, an adaptive filter having an adaptive mode and a non-adaptive mode, the adaptive mode by which a filter coefficient is sequentially updated so as to remove an ambient noise during the non-communication state period, and the non-adaptive mode by which the filter coefficient is stopped from being updated during a period except for the non-communication state period under the signal receiving state and a filter controlling means for controlling an operation for switching the adaptive mode and the non-adaptive mode of the adaptive filter.
摘要翻译： 数字接收装置包括检测装置，用于检测能够连续接收所需信号的信号接收状态下的特定码;设定装置，用于将用于检测特定码的周期设置为非通信状态周期;自适应滤波器，具有 自适应模式和非自适应模式，顺序地更新滤波器系数以在非通信状态期间去除环境噪声的自适应模式以及滤波器系数停止的非自适应模式 在除了信号接收状态之前的非通信状态期间的周期期间进行更新，以及滤波器控制装置，用于控制用于切换自适应滤波器的自适应模式和非自适应模式的操作。
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6.发明授权
公开(公告)号：US4903279A
公开(公告)日：1990-02-20
申请号：US102731
申请日：1987-09-30
申请人： Yuichi Murakami , Tomohiro Yamamoto
发明人： Yuichi Murakami , Tomohiro Yamamoto
IPC分类号： H04B1/7085
CPC分类号： H04B1/7085
摘要： The present invention discloses a receiver and a receiving method for spread spectrum communication for use in the digital communication system. The receiver basically comprises a receiving circuit, a spread signal distributing circuit, a pseudo noise signal generating circuit, an activating circuit, correlation detecting circuits, an initial seizing control circuit, a synchronization sustaining control circuit, a synchronization control circuit and a demodulating circuit. If a phase lock condition is broken within a short period of time, such condition is sustained until phase lock is recovered so that communication can be started again immediately after phase lock is recovered without initialization for each asynchronization. The receiving circuit is very much simplified and particularly, the Costas Loop demodulating circuit detects the phase lock condition when the signal obtained by multiplying the signal of which phase is shifted by 90.degree. and the reversely spread signal is within the preset range without using a phase shifter or other multiplying circuit. Accordingly the circuit structure of the receiver as a whole can be simplified.
摘要翻译： 本发明公开了一种用于数字通信系统中的扩频通信的接收机和接收方法。 接收机基本上包括接收电路，扩展信号分配电路，伪噪声信号发生电路，激活电路，相关检测电路，初始占用控制电路，同步维持控制电路，同步控制电路和解调电路。 如果相位锁定条件在短时间内被破坏，则直到相位锁定被恢复为止，才能维持这种状态，以便在相位锁定恢复后立即重新开始通信，而无需为每个异步进行初始化。 接收电路非常简化，特别是科斯塔斯环路解调电路通过将相位偏移90°的信号与反扩频信号相乘得到的信号在不使用相位的情况下检测相位锁定状态 移位器或其他乘法电路。 因此，可以简化接收机整体的电路结构。
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公开(公告)号：US4673832A
公开(公告)日：1987-06-16
申请号：US839242
申请日：1986-03-13
申请人： Yuichi Murakami , Tomohiro Yamamoto
发明人： Yuichi Murakami , Tomohiro Yamamoto
CPC分类号： H01Q1/24 , H05K9/0067
摘要： A safety device to prevent a vehicle-loaded electronic equipment from malfunctioning due to an influence of the high-level electric field. An antenna pattern for detecting the electric field is formed on the same printed board as the electronic equipment, and an electric signal level of the output from the antenna pattern is determined. When the determined level reaches a level at which the electronic equipment may malfunction, the equipment is forcibly controlled toward a safety range of operation.
摘要翻译： 一种用于防止车载电子设备由于高电平电场的影响而发生故障的安全装置。 在与电子设备相同的印刷电路板上形成用于检测电场的天线图案，并且确定来自天线图案的输出的电信号电平。 当确定的电平达到电子设备可能发生故障的水平时，将设备强制控制到安全操作范围。
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公开(公告)号：US08155242B2
公开(公告)日：2012-04-10
申请号：US12270416
申请日：2008-11-13
申请人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
发明人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
IPC分类号： H03D3/00
摘要： A frequency shift keying digital signal receiving apparatus includes a detecting portion detecting a new signal on the basis of a signal, from which a correlated ambient noise is filtered out by an adaptive filter, a holding portion holding a first electric power for the signal received before a new signal is detected, a calculating portion calculating a second electric power for the signal received after the new signal is detected, a comparing portion comparing levels of the first and second electric powers, a selector selecting the signal, from which the correlated ambient noise is filtered out, when the first electric power is higher than the second electric power and selecting the signal bypassing the adaptive filter when the first electric power is lower than the second electric power, and a demodulating portion demodulating a desired signal on the basis of the signal selected by the selecting portion.
摘要翻译： 频移键控数字信号接收装置包括：检测部，其基于由自适应滤波器滤除相关的环境噪声的信号，检测新信号;保持部，其对于接收到的信号之前保持第一电力 检测到新的信号，计算部分，对于检测到新信号之后接收到的信号计算第二电力，比较部分，比较第一和第二电力的电平;选择器，选择信号，相关环境噪声 被滤出，当第一电力高于第二电力时，并且当第一电力低于第二电力时选择旁路自适应滤波器的信号，以及解调部分，基于 信号由选择部分选择。
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公开(公告)号：US08050364B2
公开(公告)日：2011-11-01
申请号：US12270453
申请日：2008-11-13
申请人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
发明人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
IPC分类号： H04L27/06
CPC分类号： H04B1/123
摘要： A digital signal receiving apparatus includes: detection-judging portion judging a possible presence of a desired signal when a signal level of a smoothed signal is greater than a reference level; wherein said first smoothed signal and said second smoothed signal are compared in order to generate a detection signal representing a judgment of a possible presence of a desired signal, said second smoothed signal having a convergence speed slower than that of the first smoothing filter, a filter controlling portion switching an adaptive filter from an adaptive mode to a non-adaptive mode when the detection-judging portion judges the possible presence of the desired signal and switching from the non-adaptive mode to the adaptive mode when the detection-judging portion judges the absence of the desired signal; a limiting portion limiting a signal level of an auto-correlation signal to the signal level of the smoothed signal; and a demodulating portion demodulating the auto-correlation signal having the signal level limited by the limiting means so as to generate a demodulated signal, wherein the input to the demodulator is limited to the level of a smoothed signal, said smoothed signal being generated from the input of the detection judging portion.
摘要翻译： 数字信号接收装置包括：检测判断部分，当平滑信号的信号电平大于参考电平时，判断可能存在的期望信号; 其中所述第一平滑信号和所述第二平滑信号被比较以产生表示对所需信号的可能存在的判断的检测信号，所述第二平滑信号的收敛速度比第一平滑滤波器的收敛速度慢;滤波器 当检测判断部分判断出所需信号的可能存在并且从非自适应模式切换到自适应模式时，控制部分将自适应滤波器从自适应模式切换到非自适应模式 没有所需信号; 限制部分，将自相关信号的信号电平限制到平滑信号的信号电平; 以及解调部分，对具有由限制装置限制的信号电平的自相关信号进行解调，以产生解调信号，其中将解调器的输入限制为平滑信号的电平，所述平滑信号从 检测判断部分的输入。
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公开(公告)号：US20090129523A1
公开(公告)日：2009-05-21
申请号：US12270394
申请日：2008-11-13
申请人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
发明人： Tomohiro Yamamoto , Akira Furuhashi , Takahiro Horie , Yuichi Murakami , Kazunori Ono , Frederic Coutant , Tarik Aouine
IPC分类号： H04B1/10
CPC分类号： H04B1/123
摘要： A digital signal receiving apparatus includes a detection-judging portion having a first smoothing filter generating a first smoothed signal by smoothing an auto-correlation signal and judging a possible presence of a desired signal when a signal level of the first smoothed signal is greater than a reference level and an absence of the desired signal when being smaller than the reference level. The smoothing filter includes a limiting portion limiting a fluctuation width of the first smoothed signal; and an adjusting portion configured to adjust the fluctuation width of the first smoothed signal limited by the limiting portion to be reduced while an elapsing time after the detection-judging means judges the possible presence of the desired signal is increasing.
摘要翻译： 一种数字信号接收装置，包括具有第一平滑滤波器的检测判断部分，该第一平滑滤波器通过平滑自相关信号产生第一平滑信号，并且当第一平滑信号的信号电平大于一个信号时判断期望信号的可能存在 参考电平和当小于参考电平时缺少所需信号。 平滑滤波器包括限制第一平滑信号的波动宽度的限制部分; 以及调整部，其被配置为在检测判断装置判断出所需信号的可能存在之后的经过时间时，调整受限制部分限制的第一平滑信号的波动宽度的减小。
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