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1. 发明授权

US06473466B1 Data transmitting method and data transmitting apparatus accompanied with a plurality of transmitting of receiving antennas 失效
标题翻译：伴随着多个接收天线的发送的数据发送方法和数据发送装置
公开(公告)号：US06473466B1
公开(公告)日：2002-10-29
申请号：US09206406
申请日：1998-12-07
申请人： Atsushi Miyashita , Seiichi Sano , Toshiyuki Akiyama , Nobuo Tsukamoto , Tatuhiro Nakada
发明人： Atsushi Miyashita , Seiichi Sano , Toshiyuki Akiyama , Nobuo Tsukamoto , Tatuhiro Nakada
IPC分类号： H04B720
CPC分类号： H04B7/0608 , H04L1/0001 , H04L2025/03694
摘要： A data transmitting apparatus in which in an antenna switching of the data transmitting apparatus, a sudden change of transmission path characteristics is prevented and a state where an automatic equalizing function on the reception side can follow can be held. The apparatus has a processing circuit for gradually switching antennas of the data transmitting apparatus with respect to the time and for continuously switching one antenna from the rated level to the 0 level and for continuously switching the other antenna from the 0 level to the rated level. The apparatus operates so as to always keep the optimum constellation state in which the automatic equalizing process follows.
摘要翻译：一种数据发送装置，其中在数据发送装置的天线切换中防止传输路径特性的突然变化，并且可以保持接收侧的自动均衡功能能够跟随的状态。该装置具有处理电路，用于相对于时间逐渐切换数据发送装置的天线，并且将一个天线从额定电平连续地切换到0电平，并且将另一个天线从0电平连续地切换到额定电平。该装置操作以便始终保持自动均衡处理遵循的最佳星座状态。

2. 发明授权

US06611493B1 Communication, transmission and receiving method and apparatus using orthogonal frequency division multiplexing modulation system 失效
标题翻译：采用正交频分复用调制方式的通信，收发方式及装置
公开(公告)号：US06611493B1
公开(公告)日：2003-08-26
申请号：US09236601
申请日：1999-01-26
申请人： Atsushi Miyashita , Toshiyuki Akiyama , Seiichi Sano , Hiroyuki Takesue , Tatuhiro Nakada , Nobuo Tsukamoto
发明人： Atsushi Miyashita , Toshiyuki Akiyama , Seiichi Sano , Hiroyuki Takesue , Tatuhiro Nakada , Nobuo Tsukamoto
IPC分类号： H04J1100
CPC分类号： H04L27/2608
摘要： A communication method in an orthogonal frequency division multiplexing modulation communication system includes a transmission apparatus in which a frequency bandwidth of a signal modulated in accordance with an orthogonal frequency division multiplexing modulation system is changed and the modulated signal is transmitted and a receiving apparatus in which the modulated signal is received and a frequency bandwidth for demodulation of the received signal is changed to follow the change of the frequency bandwidth of the modulated signal.
摘要翻译：正交频分复用调制通信系统中的通信方法包括：发送装置，其中根据正交频分复用调制方式调制的信号的频率带宽被改变，并且调制信号被发送;以及接收装置，其中，接收到调制信号，并且改变接收信号的解调频率带宽以跟随调制信号的频率带宽的变化。

3. 发明授权

US6046629A Method of an apparatus for demodulating amplitude-modulated signals in an amplitude phase shift keying (APSK) system 失效
标题翻译：一种在幅度相移键控（APSK）系统中解调幅度调制信号的装置的方法
公开(公告)号：US6046629A
公开(公告)日：2000-04-04
申请号：US96455
申请日：1998-06-11
申请人： Toshiyuki Akiyama , Atsushi Miyashita , Seiichi Sano , Nobuo Tsukamoto , Shigeki Moriyama , Kenichi Tsuchida
发明人： Toshiyuki Akiyama , Atsushi Miyashita , Seiichi Sano , Nobuo Tsukamoto , Shigeki Moriyama , Kenichi Tsuchida
IPC分类号： H04L27/38 , H03D3/00
CPC分类号： H04L27/389
摘要： In a demodulating method of demodulating amplitude-demodulated signals in an amplitude phase shift keying system for conducting an amplitude modulation by setting signal points as information codes on a complex plane representing a signal space of transmission signals onto circumferences of two concentric circles including a first circle having a first diameter and a second circle having a second diameter smaller than the first diameter on the complex plane, there are obtained, in accordance with an amplitude value of an amplitude component of each symbol of a received amplitude-modulated signal, a first threshold value and a second threshold value having a predetermined relationship with the amplitude value. Next, the amplitude value the an amplitude component of each symbol of the successively received amplitude-modulated signal is compared with the first and second first threshold values to determine an amplitude variation in the amplitude component of each symbol in accordance with a result from the comparison so as to output therefrom a signal representing the determination result as a code obtained by demodulating the amplitude component.
摘要翻译：在解调幅度相移键控系统中的幅度解调信号的解调方法中，用于通过将表示发送信号的信号空间的信号空间的信号点设置为信号点进行幅度调制，以将发送信号的信号空间设置在包括第一圆周的两个同心圆的周围具有第一直径和第二直径小于复平面上的第一直径的第二直径，根据接收到的幅度调制信号的每个符号的振幅分量的振幅值，获得第一阈值值和与振幅值具有预定关系的第二阈值。接下来，将连续接收的幅度调制信号的每个符号的振幅分量的振幅值与第一和第二第一阈值进行比较，以根据比较结果确定每个符号的幅度分量的振幅变化从而从其输出表示确定结果的信号作为通过解调幅度分量而获得的代码。

4. 发明授权

US06381251B1 Data transmission apparatus and receiving apparatus using orthogonal frequency division multiplex modulation system 失效
标题翻译：数据传输装置和采用正交频分复用调制方式的接收装置
公开(公告)号：US06381251B1
公开(公告)日：2002-04-30
申请号：US09096454
申请日：1998-06-11
申请人： Seiichi Sano , Toshiyuki Akiyama , Atsushi Miyashita , Nobuo Tsukamoto
发明人： Seiichi Sano , Toshiyuki Akiyama , Atsushi Miyashita , Nobuo Tsukamoto
IPC分类号： H04J100
CPC分类号： H04L27/2662 , H04L27/2602 , H04L27/2675
摘要： A data transmission apparatus of an orthogonal frequency multiplex modulation system wherein data is transmitted using a plurality of carriers which are in a mutually orthogonal relationship with one another. The apparatus includes a transmitter which previously inserts a group of predetermined synchronization symbols into an OFDM modulated transmission signal every fixed period and a receiver which demodulates a received OFDM modulated transmission signal to a baseband OFDM signal. In the receiver, an absolute value of an A/D converted digital signal is taken and the signal is bandwidth-limited to a predetermined band width. Then, it is decided whether an amplitude of the signal is larger than or smaller than a predetermined value and a decision result thereof is produced. A null section in the synchronization symbol group is detected on the basis of the decision result and a start point of another synchronization symbol subsequent to the null section is further detected. The time when both of the presence of the null section and the start point of another synchronization symbol are detected is regarded as a synchronization timing and the operation timing of a demodulator for the receiver is set to the synchronization timing.
摘要翻译：正交频分复用调制系统的数据发送装置，其中使用彼此相互正交的多个载波来发送数据。该装置包括一个发送器，其先前将一组预定的同步符号插入每个固定周期的OFDM调制的传输信号，以及一个接收机，将接收的OFDM调制的传输信号解调为基带OFDM信号。在接收机中，采用A / D转换的数字信号的绝对值，并将信号带宽限制在预定的带宽。然后，确定信号的幅度是否大于或小于预定值，并且产生其判定结果。基于判定结果来检测同步符号组中的零部分，并进一步检测到零部分之后的另一个同步符号的起始点。检测到零段的存在和另一个同步符号的起始点的时间被认为是同步定时，并且用于接收机的解调器的操作定时被设置为同步定时。

5. 发明授权

US06246735B1 Synchronization detection method for data transmission apparatus and data transmission apparatus using the same 有权
标题翻译：数据发送装置的同步检测方法及使用其的数据发送装置
公开(公告)号：US06246735B1
公开(公告)日：2001-06-12
申请号：US09203564
申请日：1998-12-02
申请人： Seiichi Sano , Toshiyuki Akiyama , Atsushi Miyashita , Nobuo Tsukamoto
发明人： Seiichi Sano , Toshiyuki Akiyama , Atsushi Miyashita , Nobuo Tsukamoto
IPC分类号： H04L706
CPC分类号： H04L27/2656 , H04L7/041 , H04L27/2613
摘要： A data transmission apparatus using a digital modulation system wherein a transmitting side inserts a group of predetermined synchronization symbols into a transmission signal at predetermined intervals to be transmitted. A receiving side calculates an electric power value of a received transmission signal. When a no-signal period (null section) in the synchronization symbol group is to be detected and decided from a magnitude of the received signal electric power value, a threshold for reference of decision for detecting the null section is calculated on the basis of an average electric power value for a predetermined period in the received signal electric power value and the threshold calculated in accordance with the received signal level of the transmission signal is used to detect synchronization stably.
摘要翻译：一种使用数字调制系统的数据发送装置，其中发送侧以预定间隔将一组预定同步符号插入到发送信号中以被发送。接收侧计算接收的发送信号的电功率值。当从接收信号电功率值的大小检测并确定同步符号组中的无信号周期（空区间）时，基于使用接收信号电功率值中规定期间的平均电功率值和根据发送信号的接收信号电平计算出的阈值来稳定地检测同步。

6. 发明授权

US06813326B1 Data transmission system, data transmission communication station, and data transmission method 失效
标题翻译：数据传输系统，数据传输通信站和数据传输方式
公开(公告)号：US06813326B1
公开(公告)日：2004-11-02
申请号：US09394276
申请日：1999-09-10
申请人： Atsushi Miyashita , Toshiyuki Akiyama , Seiichi Sano , Hisao Koda , Itsuo Ishida , Hiroyuki Takesue , Tatsuhiro Nakada , Nobuo Tsukamoto
发明人： Atsushi Miyashita , Toshiyuki Akiyama , Seiichi Sano , Hisao Koda , Itsuo Ishida , Hiroyuki Takesue , Tatsuhiro Nakada , Nobuo Tsukamoto
IPC分类号： H04L704
CPC分类号： H04H20/44 , H04H20/28 , H04L5/06
摘要： A data transmission system for transmitting data from a transmitter to a receiver located away therefrom. The transmitter includes circuitry for transmitting together a main signal having a carrier modulated with main data to be transmitted and as well as a sub-signal to be used in frequency conversion and generated by modulating a carrier of a predetermined frequency out of a frequency band of the main signal. The receiver includes circuitry for receiving a receive signal from the transmitter and extracting the sub-signal therefrom and also includes circuitry for generating a signal to be used as a reference at the time of converting the receive signal to a signal having a predetermined frequency on the basis of the extracted sub-signal.
摘要翻译：一种数据传输系统，用于将数据从发射机发射到远离其的接收机。发射机包括用于将具有被发送的主数据调制的载波的主信号和用于频率转换的子信号一起发送的电路，并且通过调制来自频率的频带中的预定频率的载波主要信号。接收机包括用于从发射机接收接收信号并从其中提取子信号的电路，还包括用于产生在将接收信号转换成具有预定频率的信号时用作参考的信号的电路，提取的子信号的基础。

7. 发明授权

US06304611B1 OFDM modulator and OFDM modulation method for digital modulated wave having guard interval 失效
标题翻译：具有保护间隔的数字调制波的OFDM调制器和OFDM调制方法
公开(公告)号：US06304611B1
公开(公告)日：2001-10-16
申请号：US09099390
申请日：1998-06-18
申请人： Atsushi Miyashita , Toshiyuki Akiyama , Seiichi Sano , Nobuo Tsukamoto , Tatuhiro Nakada
发明人： Atsushi Miyashita , Toshiyuki Akiyama , Seiichi Sano , Nobuo Tsukamoto , Tatuhiro Nakada
IPC分类号： H04K110
CPC分类号： H04L27/2607 , H04L27/2626
摘要： An orthogonal frequency division multiplex (OFDM) modulator of such a system as to add guard intervals to a temporal waveform generated by modulating an input data train into a large number of (sub)carriers, conducting quadrature modulation, and outputting an OFDM signal. The OFDM modulator includes an IFFT circuit for conducting inverse fast Fourier transform processing to modulate the input data train into a large number of (sub)carriers, a guard interval adder for adding a guard interval to each effective symbol duration of a composite carrier signal supplied from the IFFT circuit and outputting a resultant signal, a control signal generator for generating, in synchronism with each guard interval of the composite carrier signal having the guard intervals added thereto, such a control signal as to attenuate signal amplitude of the composite carrier signal over an interval substantially equal in length to each guard interval; and an amplitude controller, responsive to the control signal, to attenuate the amplitude of the composite carrier signal supplied from the guard interval adder and output a resultant signal, only over an interval substantially equal in length to each guard interval. The amplitude controller outputting, in remaining intervals, the composite carrier signal supplied from the guard interval adder as it is.
摘要翻译：这种系统的正交频分复用（OFDM）调制器，用于通过将输入数据串调制成大量（子）载波，进行正交调制并输出OFDM信号而产生的时间波形增加保护间隔。 OFDM调制器包括用于进行快速傅立叶逆变换逆变换处理以将输入数据串调制成大量（子）载波的IFFT电路，用于将提供的复合载波信号的每个有效符号持续时间加上保护间隔的保护间隔加法器从IFFT电路输出结果信号，控制信号发生器，与与其相加的保护间隔的复合载波信号的每个保护间隔同步地产生一个控制信号，以便衰减复合载波信号的信号幅度长度与每个保护间隔基本相等的间隔; 以及振幅控制器，响应于控制信号，衰减从保护间隔加法器提供的复合载波信号的振幅，并输出结果信号，仅在长度上与每个保护间隔基本相等的间隔上。幅度控制器以剩余的间隔输出从保护间隔加法器原样提供的复合载波信号。

8. 发明授权

US07180368B2 Distortion compensation circuit, distortion compensation signal generating method, and power amplifier 有权
标题翻译：失真补偿电路，失真补偿信号产生方法和功率放大器
公开(公告)号：US07180368B2
公开(公告)日：2007-02-20
申请号：US10488963
申请日：2003-11-14
申请人： Nobuo Hirose , Nobuo Tsukamoto , Fumihito Tomaru , Seiichi Sano
发明人： Nobuo Hirose , Nobuo Tsukamoto , Fumihito Tomaru , Seiichi Sano
IPC分类号： H03F1/26
CPC分类号： H03F1/3282 , H03F1/3247
摘要： A distortion compensating circuit for a power amplifier attains raised compensating accuracy with shorter convergence time by accurately and quickly generating a distortion compensation signal for pre-distortion. An error signal representing the difference between the input and output signals of the power amplifier is generated. From the error signal and the input signal, the coefficients of the third-order intermodulation distortion, fifth-order intermodulation distortion and seventh-order intermodulation distortion are calculated. According to these coefficients, a distortion compensating signal which is characteristically opposite in phase and gain to the intermodulation distortions is generated.
摘要翻译：用于功率放大器的失真补偿电路通过精确且快速地产生用于预失真的失真补偿信号，从而提高了具有较短会聚时间的补偿精度。产生表示功率放大器的输入和输出信号之间的差异的误差信号。根据误差信号和输入信号，计算三阶互调失真，五阶互调失真和七阶互调失真的系数。根据这些系数，生成相位特性相反并且互调失真增益的失真补偿信号。

9. 发明授权

US07492792B2 Apparatus for receiving digital data 失效
标题翻译：用于接收数字数据的装置
公开(公告)号：US07492792B2
公开(公告)日：2009-02-17
申请号：US11071179
申请日：2005-03-04
申请人： Seiichi Sano , Atsushi Miyashita
发明人： Seiichi Sano , Atsushi Miyashita
IPC分类号： H04J3/06
CPC分类号： H04H20/10 , H04N5/268
摘要： An apparatus for receiving digital data includes a memory unit for temporarily storing therein a plurality of data streams, each of which includes data and clock obtained by demodulating plural redundant signals received in each receiver in response to a signal generated based on each clock; a writing control unit for controlling a writing of the plurality of the data streams into the memory unit; a data reading control unit for reading the data streams stored temporarily in the memory unit in a synchronized manner; and a selection unit for selecting one of the read data streams to output the selected data stream. The writing control unit detects a synchronization packet included in the plurality of data streams to control the writing of the plurality of data streams into the memory unit based on the synchronization packet.
摘要翻译：一种用于接收数字数据的装置包括一个用于临时存储多个数据流的存储器单元，每个数据流包括响应于基于每个时钟产生的信号来解调在每个接收机中接收的多个冗余信号而获得的数据和时钟; 写入控制单元，用于控制多个数据流的写入到存储单元中; 数据读取控制单元，用于以同步的方式读取临时存储在存储器单元中的数据流; 以及选择单元，用于选择所读取的数据流之一以输出所选择的数据流。写入控制单元检测包括在多个数据流中的同步分组，以基于同步分组来控制多个数据流的写入到存储器单元中。

10. 发明申请

US20050195846A1 Apparatus for receiving digital data 失效
标题翻译：用于接收数字数据的装置
公开(公告)号：US20050195846A1
公开(公告)日：2005-09-08
申请号：US11071179
申请日：2005-03-04
申请人： Seiichi Sano , Atsushi Miyashita
发明人： Seiichi Sano , Atsushi Miyashita
IPC分类号： H04J3/00 , H04L12/28 , H04L29/14
CPC分类号： H04H20/10 , H04N5/268
摘要： An apparatus for receiving digital data includes a memory unit for temporarily storing therein a plurality of data streams, each of which includes data and clock obtained by demodulating plural redundant signals received in each receiver in response to a signal generated based on each clock; a writing control unit for controlling a writing of the plurality of the data streams into the memory unit; a data reading control unit for reading the data streams stored temporarily in the memory unit in a synchronized manner; and a selection unit for selecting one of the read data streams to output the selected data stream. The writing control unit detects a synchronization packet included in the plurality of data streams to control the writing of the plurality of data streams into the memory unit based on the synchronization packet.
摘要翻译：一种用于接收数字数据的装置包括一个用于临时存储多个数据流的存储器单元，每个数据流包括响应于基于每个时钟产生的信号来解调在每个接收机中接收的多个冗余信号而获得的数据和时钟; 写入控制单元，用于控制多个数据流的写入到存储单元中; 数据读取控制单元，用于以同步的方式读取临时存储在存储器单元中的数据流; 以及选择单元，用于选择所读取的数据流之一以输出所选择的数据流。写入控制单元检测包括在多个数据流中的同步分组，以基于同步分组来控制多个数据流的写入到存储器单元中。

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