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公开(公告)号：US06389081B1
公开(公告)日：2002-05-14
申请号：US09468919
申请日：1999-12-22
IPC分类号： H04L2720
CPC分类号： H04L27/2082
摘要： The signal transmission equipment is comprised such that a signal point does not cross the origin of the constellation by selecting signals to be input to the QPSK modulator, and the positions of the signal points in the constellation.
摘要翻译： 信号传输设备包括使得信号点不通过选择要输入到QPSK调制器的信号以及星座中的信号点的位置与星座的原点相交。
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公开(公告)号：US06496534B1
公开(公告)日：2002-12-17
申请号：US08883959
申请日：1997-06-27
IPC分类号： H04B1500
CPC分类号： H04B1/712 , H04B1/71075
摘要： A code division multiple access receiver estimates symbol values transmitted by different stations by despreading a combined received signal, weights the estimated symbol values by use of weighting factors calculated for the different stations, respreads the weighted symbol values to estimate the interference due to each station, and subtracts the estimated interference from the received signal to produce a residual signal. The weighting factors can be calculated from the residual signal; the weighting factors are calculated so as to minimize the power of the residual signal. The weighting factors are adjusted at certain intervals, preferably at intervals determined from the rate of fading of the received signal.
摘要翻译： 码分多址接收机通过解扩组合接收信号来估计由不同台发射的符号值，通过使用为不同台计算的加权因子加权所估计的符号值，再次加权加权符号值以估计由于每个台站造成的干扰， 并从接收信号中减去估计的干扰，产生残留信号。 加权因子可以从剩余信号中计算出来; 计算加权系数，以使剩余信号的功率最小化。 加权因子以某些间隔进行调整，优选地以从接收信号的衰落速率确定的间隔进行调整。
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3.发明授权Multi-stage linear predictive analysis method for feature extraction from acoustic signals 失效用于从声信号中提取特征的多级线性预测分析方法
公开(公告)号：US5243686A
公开(公告)日：1993-09-07
申请号：US870883
申请日：1992-04-20
摘要： Features are extracted from a sampled input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selected using information entropy values representing the information content of the residuals of the second linear predictive analyses. One or more optimum second orders q are selected on the basis of changes in these information entropy values. The optimum first and second orders are output as features. Further linear predictive analyses can be carried out to obtain higher-order features. Useful features are obtained even for nonstationary input signals.
摘要翻译： 通过对样本值执行不同的第一阶数p的第一线性预测分析，并且对第一分析的残差进行不同的第二阶数q的第二线性预测分析，从采样的输入信号中提取特征。 使用表示第二线性预测分析的残差的信息内容的信息熵值来选择最优的一阶和上行和下标。 在这些信息熵值的变化的基础上选择一个或多个最优的第二个顺序和上下文。 最优的第一和第二个订单作为特征输出。 可以进行进一步的线性预测分析以获得更高阶的特征。 即使对非稳态输入信号也可获得有用的特性。
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公开(公告)号：US5142581A
公开(公告)日：1992-08-25
申请号：US447667
申请日：1989-12-08
CPC分类号： G10L19/08
摘要： Features are extracted from a sample input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selected using information entropy values representing the information content of the residuals of the second linear predictive analyses. One or more optimum second orders q are selected on the basis of changes in these information entropy values. The optimum first and second orders are output as features. Further linear predictive analyses can be carried out to obtain higher-order features. Useful features are obtained even for nonstationary input signals.
摘要翻译： 通过对样本值执行不同的第一阶数p的第一线性预测分析，并对第一分析的残差进行不同的第二阶数q的第二线性预测分析，从样本输入信号中提取特征。 使用表示第二线性预测分析的残差的信息内容的信息熵值来选择最优的一阶和上行和下标。 在这些信息熵值的变化的基础上选择一个或多个最优的第二个顺序和上下文。 最优的第一和第二个订单作为特征输出。 可以进行进一步的线性预测分析以获得更高阶的特征。 即使对非稳态输入信号也可获得有用的特性。
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公开(公告)号：US20100246725A1
公开(公告)日：2010-09-30
申请号：US12656265
申请日：2010-01-22
申请人： Kazunori Okuyama , Hideo Tsutsui , Kiyohito Tokuda
发明人： Kazunori Okuyama , Hideo Tsutsui , Kiyohito Tokuda
摘要： In a selective diversity receiver with two antennas, the strength of the signal received by each antenna is measured at a present and a past time, the difference between the present strengths of the signals received by the two antennas is calculated, and the difference between the present and past strengths of the signal received by each antenna is calculated. If the difference between the present strengths of the two signals is not too large, the signal with the smaller past-to-present strength difference and accordingly with less fading is selected for further reception. In a portable electronic device, this antenna switching strategy reduces susceptibility to human body interference. The present and past strengths can be measured during the preambles of different packets to avoid switching antennas during data reception.
摘要翻译： 在具有两个天线的选择分集接收机中，在现在和过去的时间测量每个天线接收的信号的强度，计算由两个天线接收的信号的当前强度之间的差异， 计算每个天线接收到的信号的当前和过去的强度。 如果两个信号的当前强度之间的差异不是太大，则选择具有较小的过去到当前强度差异并因此具有较少衰落的信号用于进一步的接收。 在便携式电子设备中，这种天线切换策略降低了对人体干扰的敏感性。 可以在不同分组的前导码段期间测量当前和过去的优点，以避免在数据接收期间切换天线。
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公开(公告)号：US06766172B1
公开(公告)日：2004-07-20
申请号：US09665599
申请日：2000-09-19
申请人： Kiyohito Tokuda , Kinya Asano , Masayuki Fujise , Fumihide Kojima , Masahiro Watanabe , Ryobun Tachita
发明人： Kiyohito Tokuda , Kinya Asano , Masayuki Fujise , Fumihide Kojima , Masahiro Watanabe , Ryobun Tachita
IPC分类号： H04Q720
CPC分类号： H04W74/00 , H04W4/00 , H04W48/08 , H04W64/00 , H04W88/085
摘要： A road vehicle communication method allows bothway communication to be held between a mobile station, which sends a request for an information service and receives it, and a central base station and local base stations located at a roadside for sending the information service to the mobile station. The central base station and the local base stations use optical fibers in part of the transmission path thereof for the bothway communication and perform at least one of electric-to-optical conversion and optical-to-electric conversion. The mobile station is caused to send the request for an information service beforehand. In response to the request, the local base station covering the mobile station expected to receive the information service is estimated. When the mobile station lies in a service area to which the local base station estimated is assigned, a control station is caused to provide the mobile station with information corresponding to the information service requested.
摘要翻译： 公路车辆通信方法允许在发送对信息服务的请求并接收它的移动站之间保持双向通信，以及位于路边的中央基站和本地基站，用于向移动站发送信息服务 。 中央基站和本地基站在其一部分传输路径中使用光纤进行双向通信，并执行电 - 光转换和光 - 电转换中的至少一个。 移动台预先发送信息服务请求。 响应于该请求，估计覆盖期望接收信息服务的移动站的本地基站。 当移动台位于分配了本地基站的服务区域时，使得控制站向移动台提供与所请求的信息服务对应的信息。
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公开(公告)号：US5239623A
公开(公告)日：1993-08-24
申请号：US424703
申请日：1989-10-20
申请人： Takuro Sato , Manabu Kawabe , Toshio Kato , Kiyohito Tokuda
发明人： Takuro Sato , Manabu Kawabe , Toshio Kato , Kiyohito Tokuda
IPC分类号： G06T15/00
CPC分类号： G06T13/60
摘要： A three-dimensional image generator generates a random signal which it filters in two dimensions generate a realistic three-dimensional image of a natural object such as ocean waves or clouds. By performing the filtering operation repeatedly on overlapping intervals of the random signal, related images can be obtained to generate moving scenes at real-time rates. Two or more partial image generators can be connected in parallel to generate different directions of motion, or different parts of a complex scene. Within each partial image generator, two or more space filters can be connected in parallel to generate superimposed patterns, such as small ripples superimposed on large waves. This image generator is much faster than previous, fractal image generators.
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