公开(公告)号：US08620274B2

公开(公告)日：2013-12-31

申请号：US11004814

申请日：2004-12-07

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： H04M1/725

CPC分类号： H04L67/125 ,  H04L67/04 ,  H04L67/30 ,  H04L67/303 ,  H04L67/34 ,  H04M1/274508 ,  H04M1/274516 ,  H04M1/72525 ,  H04M1/72561 ,  H04W8/245

摘要： A mobile communication system comprises a server, a cellular phone and a computer. The server sends/receives data through a network. The cellular phone downloads data to be used by itself, which is stored in the server. The computer transmits data to be used by the mobile communication terminal to the server. A user of the cellular phone updates or inputs data to be installed in the cellular phone from the computer. The data can be downloaded from the computer to the cellular phone.

摘要翻译： 移动通信系统包括服务器，蜂窝电话和计算机。 服务器通过网络发送/接收数据。 手机下载要存储在服务器中的自己使用的数据。 计算机将由移动通信终端使用的数据发送到服务器。 蜂窝电话的用户从计算机更新或输入要安装在蜂窝电话中的数据。 数据可以从计算机下载到手机。

公开(公告)号：US08050367B2

公开(公告)日：2011-11-01

申请号：US12066877

申请日：2006-09-14

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： H04L27/08

CPC分类号： H03G3/3089 ,  H03G3/001 ,  H03G3/3052 ,  H03G2201/302 ,  H04B1/30

摘要： Input average levels and output average levels of digital channel filters 217 and 218 are computed in amplitude calculation circuits 101 and 102. In a gain difference calculation circuit 103, a gain difference of the input levels and the output levels is computed as a multiplier α so that a difference between the input levels and the output levels are eliminated or adjusted to be within a certain value. The outputs of the digital channel filters 217 and 218 are multiplied by the multiplier α in multiplier units 104 and 105. The multiplication results are outputted as corrected digital signals to a subsequent digital signal processing circuit.

摘要翻译： 在幅度计算电路101和102中计算数字通道滤波器217和218的输入平均电平和输出平均电平。在增益差计算电路103中，输入电平和输出电平的增益差被计算为乘数α，因此 输入电平和输出电平之间的差异被消除或调整到一定值之内。 数字信道滤波器217和218的输出在乘法器单元104和105中乘以乘法器α。乘法结果作为经校正的数字信号输出到随后的数字信号处理电路。

公开(公告)号：US07843803B2

公开(公告)日：2010-11-30

申请号：US11441257

申请日：2006-05-25

申请人： Masaki Ichihara ,  Yukitsuna Furuya

发明人： Masaki Ichihara ,  Yukitsuna Furuya

IPC分类号： H04J11/00

CPC分类号： H04L5/0046 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/06 ,  H04L27/183 ,  H04L27/2604 ,  H04L27/3488

摘要： To provide an orthogonal frequency division multiplex modem circuit which can multiplex signals, whose bit rates and QoS are different from one another, and can transmit the signals via one OFDM line. A serial/parallel converter converts input signals into a complex parallel signal respectively, and a sub carrier and a modulation system are assigned every communication channel. A randomizer changes the alignment sequence of the signal, a discrete inverse Fourier transformer processes the signal, a parallel/serial converter converts the signal into a serial signal, and a transmitter performs the orthogonal modulation of the signal to output the signal from an antenna. A receiver performs orthogonal demodulation of the signal received with an antenna, a serial/parallel converter converts the signal into a parallel signal, and a discrete Fourier transformer processes the parallel signal. In addition, a de-randomizer restores the alignment sequence of the subcarriers into the original condition, and a parallel/serial converter decodes and outputs the signal.

摘要翻译： 提供一种正交频分复用调制解调器电路，其可以将其比特率和QoS彼此不同的信号进行复用，并且可以经由一条OFDM线路发送信号。 串行/并行转换器将输入信号分别转换成复并行信号，每个通信信道分配一个子载波和一个调制系统。 随机化器改变信号的对准顺序，离散傅里叶逆变换器处理信号，并行/串行转换器将信号转换成串行信号，并且发射机执行信号的正交调制以从天线输出信号。 接收机对由天线接收的信号执行正交解调，串/并转换器将信号转换为并行信号，离散付里叶变换器处理并行信号。 此外，去随机器将子载波的对准序列恢复到原始状态，并行/串行转换器解码并输出信号。

公开(公告)号：US06922451B1

公开(公告)日：2005-07-26

申请号：US09549279

申请日：2000-04-14

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： H04L27/38 ,  H04B1/707 ,  H04J1/00 ,  H04J11/00 ,  H04J13/00 ,  H04L27/22 ,  H04L27/26 ,  H03D3/00 ,  H04L27/14 ,  H04L7/00

CPC分类号： H04L27/2657 ,  H04L27/2679

摘要： This invention is regarding a frequency shifting circuit suitable for a digital demodulator in a multi-carrier communications system. After converting analog signal vectors to the input signal vectors according to a predetermined sampling clock, control data is generated from a frequency difference between sub-carrier bands and center carrier band. A signal vector rotator is provided corresponding to each of the sub-carrier bands and rotates the input signal vectors on the I-Q plane by an angle determined depending on corresponding control data to shift the sub-carrier bands of the input signal vectors to the center carrier band. A band-pass filter passes an output signal vector of the center carrier band.

摘要翻译： 本发明涉及适用于多载波通信系统中的数字解调器的频移电路。 在根据预定采样时钟将模拟信号矢量转换为输入信号矢量之后，根据副载波频带和中心载波频带之间的频率差产生控制数据。 对应于每个子载波频带提供信号矢量旋转器，并且将IQ平面上的输入信号矢量旋转一个取决于相应的控制数据的角度，以将输入信号矢量的副载波频带移动到中心载波 带。 带通滤波器通过中心载波频带的输出信号矢量。

公开(公告)号：US06587513B1

公开(公告)日：2003-07-01

申请号：US09377797

申请日：1999-08-20

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： H04L2704

CPC分类号： H03C3/406 ,  H03D7/168 ,  H03F1/3241

摘要： Disclosed is a predistorter for preliminarily compensating a distortion caused in a circuit comprising a modulator, a variable gain amplifier, and a non-linear amplifier, the predistorter comprising: an amplitude detector for detecting an amplitude of an input signal; a gain detector for detecting a gain of the variable gain amplifier; a first multiplier for multiplying the amplitude of the input signal with the gain of the variable gain to output a product therebetween; a generator for generating a predistortion function corresponding to the product; and a second multiplier for multiplying the input signal with the predistortion function to output a product therebetween to the modulator.

摘要翻译： 公开了一种用于预先补偿由包括调制器，可变增益放大器和非线性放大器的电路引起的失真的预失真器，所述预失真器包括：振幅检测器，用于检测输入信号的幅度; 增益检测器，用于检测可变增益放大器的增益; 用于将输入信号的幅度与可变增益的增益相乘以在其间输出乘积的第一乘法器; 用于产生与产品相对应的预失真函数的发生器; 以及第二乘法器，用于将输入信号与预失真函数相乘以在其间输出产品到调制器。

公开(公告)号：US06424124B1

公开(公告)日：2002-07-23

申请号：US09749187

申请日：2000-12-27

申请人： Masaki Ichihara ,  Kozo Maemura

发明人： Masaki Ichihara ,  Kozo Maemura

IPC分类号： H01M1046

摘要： A charging system for portable equipment is provided which may be used in a system including an information terminal and portable equipment connected to the information terminal. The charging system includes a power supply output device provided with the information terminal and a first battery control device provided with the portable equipment. The power supply output device is capable of supplying electric power, which is supplied to the information terminal, to the portable equipment. The first battery control device receives electric power supplied from the power supply output device and performs a charging operation for a battery of the portable equipment.

公开(公告)号：US06330455B1

公开(公告)日：2001-12-11

申请号：US09360610

申请日：1999-07-26

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： H04B700

CPC分类号： H04W52/52

摘要： Disclosed is a transmission power controller to prevent a transmission power from being excessive in mobile communication terminal equipment that requires a precise transmission power control. Branching filter 11, detector 12 and smoothing circuit 13 in combination generate a detected voltage corresponding to an average transmission power from the mobile communication terminal equipment. Threshold setting circuit 14 generates a threshold voltage corresponding to an allowable maximum average transmission power. Voltage comparator 15 decides if the average transmission power from the mobile communication terminal equipment is higher or lower than the allowable maximum average transmission power by comparing the detected voltage with the threshold voltage. Controller 16 varies a control voltage so as to lower a gain of a variable gain amplifier 4 if the average transmission power is decided to be higher than the allowable maximum average transmission power.

摘要翻译： 公开了一种发送功率控制器，用于在需要精确的发送功率控制的移动通信终端设备中防止发送功率过大。 分支滤波器11，检测器12和平滑电路13组合地产生对应于来自移动通信终端设备的平均发送功率的检测电压。 阈值设定电路14生成与允许的最大平均发送功率对应的阈值电压。 电压比较器15通过将检测到的电压与阈值电压进行比较来判定来自移动通信终端设备的平均发送功率是否高于或低于允许的最大平均发送功率。 控制器16改变控制电压，以便如果平均发送功率被确定为高于允许的最大平均发送功率，则降低可变增益放大器4的增益。

公开(公告)号：US5878087A

公开(公告)日：1999-03-02

申请号：US310084

申请日：1994-09-22

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： H03D7/16 ,  H04B1/06 ,  H04B1/38 ,  H04B1/69 ,  H04J13/00 ,  H03K9/00 ,  H03L27/06 ,  H03L27/14 ,  H03L27/22

CPC分类号： H03D7/161

摘要： In a dual CDMA mode and FM mode receiver, a local oscillator selectively outputs a local oscillation signal for a CDMA mode or a local oscillation signal for an FM mode in response to a command. A mixer mixes the local oscillation signal with an intermediate frequency signal to produce a signal having a predetermined frequency. Filters assigned to a CDMA mode and an FM mode, respectively, each filters the output of the mixer. After an AGC amplifier has amplified the output of the filter, a digital signal processor demodulates the output of the amplifier. Switches are provided for selecting either a CDMA mode or an FM mode.

摘要翻译： 在双CDMA模式和FM模式接收机中，响应于命令，本地振荡器选择性地输出用于CDMA模式的本地振荡信号或用于FM模式的本地振荡信号。 混频器将本地振荡信号与中频信号混频以产生具有预定频率的信号。 分配给CDMA模式和FM模式的滤波器分别对混频器的输出进行滤波。 在AGC放大器放大滤波器的输出后，数字信号处理器解调放大器的输出。 开关用于选择CDMA模式或FM模式。

公开(公告)号：US5847542A

公开(公告)日：1998-12-08

申请号：US837324

申请日：1997-04-11

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： G01R31/36 ,  H01M10/44 ,  H02J7/00 ,  H01M10/46

CPC分类号： H01M10/44 ,  G01R31/3658 ,  H02J7/0018 ,  H02J7/0026

摘要： A rechargable battery pack is constituted by not connecting all of the terminals of a plurality of secondary batteries but extracting them outside. A charging circuit is constituted by a dedicated charging circuit which comprises a constant-voltage circuit and a constant-current circuit for each of the rechargable batteries to charge each rechargable battery separately. A discharging circuit comprises, for each of the rechargable batteries, a controller for preventing an overdischarge and a warning portion for warning of an overdischarge.

摘要翻译： 可再充电电池组由不连接多个二次电池的所有端子而是将其外部提取而构成。 充电电路由专用充电电路构成，该专用充电电路包括用于每个可充电电池的恒压电路和恒流电路，以分别对每个可再充电电池充电。 对于每个可再充电电池，放电电路包括用于防止过放电的控制器和用于警告过放电的警告部分。

公开(公告)号：US5283583A

公开(公告)日：1994-02-01

申请号：US901020

申请日：1992-06-19

申请人： Masaki Ichihara

发明人： Masaki Ichihara

IPC分类号： H03M1/44

CPC分类号： H03M1/44

摘要： In an analog-to-digital converter, one-bit A/D conversion stages are connected in series to receive an analog signal. Each conversion stage includes a sample-and-hold circuit for sampling an analog signal from a preceding stage, a comparator for comparing it with a specified voltage level to produce a logic signal at one of two discrete levels depending on whether the signal received from the preceding stage is higher or lower than the specified level. The signal received from the preceding stage is summed with a prescribed reference voltage of one of opposite polarities depending on the level of the logic signal to produce an analog output signal. The successive conversion stages are driven so that the analog signal from each stage is transferred to the next, and the logic signals generated by the individual conversion stages are delayed so that they appear simultaneously at digital output terminals.

摘要翻译： 在模数转换器中，一位A / D转换级串联连接以接收模拟信号。 每个转换级包括用于对来自前一级的模拟信号进行采样的采样和保持电路，用于将其与指定电压电平进行比较的比较器，以根据从两个离散电平接收的信号产生两个离散电平之一的逻辑信号 前级高于或低于指定级别。 根据逻辑信号的电平，从前一级接收的信号与相反极性之一的规定参考电压相加，以产生模拟输出信号。 驱动连续的转换级，使得来自每一级的模拟信号被转移到下一个，并且各个转换级产生的逻辑信号被延迟，使得它们同时出现在数字输出端。