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1. 发明授权

US07619963B2 OFDM signal frame generator, transmitter, signal transmission system and OFDM signal frame generating method 有权
标题翻译： OFDM信号帧发生器，发射机，信号传输系统和OFDM信号帧生成方法
公开(公告)号：US07619963B2
公开(公告)日：2009-11-17
申请号：US10865817
申请日：2004-06-14
申请人： Tetsushi Abe , Hirohito Suda , Shigeru Tomisato , Hiromasa Fujii , Takefumi Yamada
发明人： Tetsushi Abe , Hirohito Suda , Shigeru Tomisato , Hiromasa Fujii , Takefumi Yamada
IPC分类号： H04J11/00 , H04J1/00 , H04K1/10 , H04L27/28
CPC分类号： H04L5/0048 , H04L5/0007 , H04L5/0046 , H04L5/006
摘要： An OFDM signal frame generator includes a rate determiner configured to determine rate information to generate a signal frame to be transmitted as an OFDM signal based on a value of a received signal quality. The signal frame generator further includes a pilot and data arrangement format determiner configured to determine a pilot and data arrangement format of the signal that is to be transmitted; power amplification rate determiner configured to determine a power amplification rate for the signal frame; data symbol generator configured to generate data symbol series to be transmitted based on the rate information and based on the power amplification rate; and transmission signal frame generator configured to generate the signal frame based on the generated data symbol series, on the number of pilot symbols, and based on the pilot & data arrangement format.
摘要翻译： OFDM信号帧发生器包括速率确定器，其被配置为基于接收信号质量的值来确定速率信息以生成要作为OFDM信号发送的信号帧。所述信号帧发生器还包括导频和数据排列格式确定器，被配置为确定要发送的信号的导频和数据排列格式; 功率放大率确定器，被配置为确定所述信号帧的功率放大率; 数据符号发生器，其被配置为基于所述速率信息并基于所述功率放大率生成要发送的数据符号序列; 以及发送信号帧生成器，被配置为基于所生成的数据符号序列，关于导频符号的数量，并且基于导频和数据排列格式生成信号帧。

2. 发明申请

US20070153673A1 Orthogonal frequency multi-carrier transmission device and transmission method 失效
标题翻译：正交频分多载波传输设备及传输方式
公开(公告)号：US20070153673A1
公开(公告)日：2007-07-05
申请号：US10537287
申请日：2003-12-02
申请人： Shigeru Tomisato , Hirohito Suda , Takefumi Yamada
发明人： Shigeru Tomisato , Hirohito Suda , Takefumi Yamada
IPC分类号： H04J11/00 , H04J1/00
CPC分类号： H04L27/2614 , H04L5/0016 , H04L25/0228 , H04L27/2602
摘要： Symbols converted by a serial-to-parallel converting part (12) from serial to parallel form are subjected to inverse Fourier transform processing in an inverse Fourier transform part (13) as sub-carrier signal components of a frequency interval equal to the symbol rate, then the levels of the resulting time domain signal components are compared with a permissible peak level Cth in a peak component detecting part (22) to detect peak components, and the peak components are transformed by a Fourier transform part (23) to frequency domain components, which are subtracted by subtractors (240 to 24N-1) from the corresponding sub-carrier signal components to thereby reduce the peak power.
摘要翻译：由串并转换部分（12）从串行到并行形式转换的符号在逆傅里叶变换部分（13）中进行傅里叶逆变换处理，作为等于符号率的频率间隔的副载波信号分量然后将所得到的时域信号分量的电平与峰值分量检测部分（22）中允许的峰值电平C SUB进行比较，以检测峰值分量，并且通过傅立叶变换将峰值分量变换将变换部分（23）转换成从相应的子载波信号分量中减去减法器（24 <0>至24 N-1>）的频域分量，从而减少峰值功率。

3. 发明授权

US07652981B2 Orthogonal frequency multi-carrier transmission device and transmission method 失效
标题翻译：正交频分多载波传输设备及传输方式
公开(公告)号：US07652981B2
公开(公告)日：2010-01-26
申请号：US10537287
申请日：2003-12-02
申请人： Shigeru Tomisato , Hirohito Suda , Takefumi Yamada
发明人： Shigeru Tomisato , Hirohito Suda , Takefumi Yamada
IPC分类号： H04L11/00
CPC分类号： H04L27/2614 , H04L5/0016 , H04L25/0228 , H04L27/2602
摘要： Symbols converted by a serial-to-parallel converting part (12) from serial to parallel form are subjected to inverse Fourier transform processing in an inverse Fourier transform part (13) as sub-carrier signal components of a frequency interval equal to the symbol rate, then the levels of the resulting time domain signal components are compared with a permissible peak level Cth in a peak component detecting part (22) to detect peak components, and the peak components are transformed by a Fourier transform part (23) to frequency domain components, which are subtracted by subtractors (240 to 24N−1) from the corresponding sub-carrier signal components to thereby reduce the peak power.
摘要翻译：由串并转换部分（12）从串行到并行形式转换的符号在逆傅里叶变换部分（13）中进行傅里叶逆变换处理，作为等于符号率的频率间隔的副载波信号分量，然后将所得时域信号分量的电平与峰值分量检测部分（22）中允许的峰值电平Cth进行比较，以检测峰值分量，并将峰值分量由傅里叶变换部分（23）变换为频域分量，由相应的副载波信号分量由减法器（240〜24N-1）减去，从而降低峰值功率。

4. 发明申请

US20050129137A1 Multiple-output multiple-input (MIMO) communication system, MIMO receiver and MIMO receiving method 有权
标题翻译：多输出多输入（MIMO）通信系统，MIMO接收机和MIMO接收方式
公开(公告)号：US20050129137A1
公开(公告)日：2005-06-16
申请号：US10767282
申请日：2004-01-30
申请人： Takefumi Yamada , Hirohito Suda , Shigeru Tomisato
发明人： Takefumi Yamada , Hirohito Suda , Shigeru Tomisato
IPC分类号： H04B7/04 , H04B7/06 , H04B7/08 , H04L1/06 , H04L1/02
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0634 , H04B7/0848 , H04L1/0026 , H04L1/06
摘要： This invention provides an MIMO communication system and MIMO communication method. An MIMO receiver estimates state of each communication channel from the received signals received by #1 to #L antennas, generates feedback information according to the information of channel state, sends the feedback information to a transmitter through a feedback path, processes the feedback information in order to compensate feedback-delay of the feedback path, generate K*L proper reception weights by using the information of channel state and processed feedback information, multiplies the received #1 to #L substreams of respective #1 to #K signal streams by the proper #1 to #L reception weights, respectively, composes the #1 to #L weighted substreams to obtain respective composed #1 to #K signal streams and demodulate the composed #1 to #K signal streams, respectively, and combines the demodulated K signal streams to reproduce an original transmission signal.
摘要翻译：本发明提供一种MIMO通信系统和MIMO通信方法。 MIMO接收机根据＃1至#L天线接收的接收信号估计每个通信信道的状态，根据信道状态的信息生成反馈信息，通过反馈路径将反馈信息发送到发射机，处理反馈信息为了补偿反馈路径的反馈延迟，通过使用信道状态和处理的反馈信息的信息生成K * L适当的接收权重，将相应＃1至#K信号流的接收＃1至#L子流乘以分别对＃1〜#L的接收权重构成＃1〜#L的加权子流，以分别获得各组合的＃1〜#K信号流，并分别对组合＃1〜#K信号流进行解调，并将解调后的K 信号流以再现原始传输信号。

5. 发明授权

US08019013B2 Multiple-output multiple-input (MIMO) communication system, MIMO receiver and MIMO receiving method 有权
标题翻译：多输出多输入（MIMO）通信系统，MIMO接收机和MIMO接收方式
公开(公告)号：US08019013B2
公开(公告)日：2011-09-13
申请号：US12839990
申请日：2010-07-20
申请人： Takefumi Yamada , Hirohito Suda , Shigeru Tomisato
发明人： Takefumi Yamada , Hirohito Suda , Shigeru Tomisato
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0634 , H04B7/0848 , H04L1/0026 , H04L1/06
摘要： A receiver that receives a signal from a transmitter, including: a plurality of antennas; a channel estimation unit; a channel accumulation unit; a transmission weight generator; a feedback information transmission unit; and a reception weight generator. The plurality of antennas receive a second signal from the transmitter, the second signal being transmitted by using first feedback information. The channel estimation unit estimates a communication channel state on the basis of the second signal, and then outputs second channel estimation information. The reception weight generator generates reception weight information to be multiplied by the second signal, on the basis of first channel estimation information accumulated in the channel accumulation unit and a first transmission weight.
摘要翻译：一种从发射机接收信号的接收机，包括：多个天线; 信道估计单元; 渠道积累单位; 传动重量发生器; 反馈信息传输单元; 和接收重量发生器。多个天线从发射机接收第二信号，通过使用第一反馈信息发送第二信号。信道估计单元基于第二信号估计通信信道状态，然后输出第二信道估计信息。接收权重发生器基于在信道累积单元中累积的第一信道估计信息和第一传输权重生成要乘以第二信号的接收权重信息。

6. 发明授权

US07633924B2 Communications system, communications method, transmitting apparatus, receiving apparatus and control program to variably adjust a symbol length 失效
标题翻译：通信系统，通信方法，发送装置，接收装置和控制程序，以可变地调整符号长度
公开(公告)号：US07633924B2
公开(公告)日：2009-12-15
申请号：US10535859
申请日：2003-11-20
申请人： Hiromasa Fujii , Shigeru Tomisato , Hirohito Suda , Tetsushi Abe , Takefumi Yamada
发明人： Hiromasa Fujii , Shigeru Tomisato , Hirohito Suda , Tetsushi Abe , Takefumi Yamada
IPC分类号： H04J1/00
CPC分类号： H04L27/2602 , H04B1/7103 , H04L27/2607 , H04L27/2608 , H04L27/261 , H04L27/2613 , H04L27/2626 , H04L27/2656 , H04L27/2662 , H04L27/2688
摘要： An object of the present invention is to provide a communications system etc., which can reduce the influence of interference from other systems which results from a difference in symbol length, in an area where a plurality of systems using different transmission methods are mixed. The present invention relates to a communications system in which a plurality of systems share the same frequency bandwidth so as to transmit information symbols. One of the plurality of systems 1 includes an identifying unit 109 configured to identify the symbol length of an information symbol transmitted in a different system 2; and an adjusting unit 102, 107 configured to adjust the symbol length of an information symbol to be transmitted, in accordance with an identified symbol length.
摘要翻译：本发明的目的是提供一种通信系统等，其可以在混合使用不同传输方式的多个系统的区域中减少由于符号长度的差异而导致的来自其他系统的干扰的影响。本发明涉及一种通信系统，其中多个系统共享相同的频率带宽以便发送信息符号。多个系统1中的一个包括识别单元109，其被配置为识别在不同系统2中发送的信息符号的符号长度; 以及调整单元102,107，其被配置为根据所识别的符号长度来调整要发送的信息符号的符号长度。

7. 发明申请

US20050094552A1 OFDM signal frame generator, transmitter, signal transmission system and OFDM signal frame generating method 有权
标题翻译： OFDM信号帧发生器，发射机，信号传输系统和OFDM信号帧生成方法
公开(公告)号：US20050094552A1
公开(公告)日：2005-05-05
申请号：US10865817
申请日：2004-06-14
申请人： Tetsushi Abe , Hirohito Suda , Shigeru Tomisato , Hiromasa Fujii , Takefumi Yamada
发明人： Tetsushi Abe , Hirohito Suda , Shigeru Tomisato , Hiromasa Fujii , Takefumi Yamada
IPC分类号： H04L27/26 , H04B3/10 , H04J11/00
CPC分类号： H04L5/0048 , H04L5/0007 , H04L5/0046 , H04L5/006
摘要： An object of the present invention is, in a communication path of which received signal quality is extremely poor, to prevent such a state of the communication failure. To a frame generator 13 in a transmitter 10, which transmits OFDM signal, a pilot & data arrangement format determiner 20, which determines pilot & data arrangement format of an OFDM signal based on the value of received signal quality at a receiver 30, a pilot symbol number determiner 19, which determines the number of pilot symbols based on the value of received signal quality, and a power amplification rate determiner 18, which determines power amplification rate based on the value of received signal quality, are newly provided. Thereby, it is possible to change the pilot & data arrangement format, the number of pilot symbols and the power amplification rate depending on the value of received signal quality to generate transmission signal frame of the OFDM signal. Owing to this, even in a channel of which received signal quality is poor, it is possible to satisfactorily reduce the transmission rate using adaptive modulation technique and maintain the channel estimation accuracy to a satisfactory level, and thus it is possible to prevent such a state of the communication failure.
摘要翻译：本发明的目的是在接收信号质量极差的通信路径中，防止这种通信失败的状态。导频和数据排列格式确定器20向发射机10发送OFDM信号的帧发生器13，导频和数据排列格式确定器20基于接收机30处的接收信号质量的值确定OFDM信号的导频和数据排列格式，符号数确定器19，其基于接收信号质量的值来确定导频符号的数量，并且基于接收信号质量的值确定功率放大率的功率放大率确定器18。因此，可以根据接收信号质量的值来改变导频和数据排列格式，导频符号数和功率放大率，以产生OFDM信号的发送信号帧。由此，即使在接收信号质量差的信道中，也可以使用自适应调制技术令人满意地降低传输速率，并且将信道估计精度保持在令人满意的水平，因此可以防止这种状态的通信故障。

8. 发明授权

US07813440B2 Multiple-output multiple-input (MIMO) communication system, MIMO receiver and MIMO receiving method 有权
标题翻译：多输出多输入（MIMO）通信系统，MIMO接收机和MIMO接收方式
公开(公告)号：US07813440B2
公开(公告)日：2010-10-12
申请号：US10767282
申请日：2004-01-30
申请人： Takefumi Yamada , Hirohito Suda , Shigeru Tomisato
发明人： Takefumi Yamada , Hirohito Suda , Shigeru Tomisato
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0634 , H04B7/0848 , H04L1/0026 , H04L1/06
摘要： This invention provides an MIMO communication system and MIMO communication method. An MIMO receiver estimates state of each communication channel from the received signals received by #1 to #L antennas, generates feedback information according to the information of channel state, sends the feedback information to a transmitter through a feedback path, processes the feedback information in order to compensate feedback-delay of the feedback path, generate K*L proper reception weights by using the information of channel state and processed feedback information, multiplies the received #1 to #L substreams of respective #1 to #K signal streams by the proper #1 to #L reception weights, respectively, composes the #1 to #L weighted substreams to obtain respective composed #1 to #K signal streams and demodulate the composed #1 to #K signal streams, respectively, and combines the demodulated K signal streams to reproduce an original transmission signal.
摘要翻译：本发明提供一种MIMO通信系统和MIMO通信方法。 MIMO接收机根据＃1至#L天线接收的接收信号估计每个通信信道的状态，根据信道状态的信息生成反馈信息，通过反馈路径将反馈信息发送到发射机，处理反馈信息为了补偿反馈路径的反馈延迟，通过使用信道状态和处理的反馈信息的信息生成K * L适当的接收权重，将相应＃1至#K信号流的接收＃1至#L子流乘以分别对＃1〜#L的接收权重构成＃1〜#L的加权子流，以分别获得各组合的＃1〜#K信号流，并分别对组合＃1〜#K信号流进行解调，并将解调后的K 信号流以再现原始传输信号。

9. 发明申请

US20060031583A1 Communication system, communication method, transmission device, reception device, and control program 失效
标题翻译：通信系统，通信方式，传输设备，接收设备和控制程序
公开(公告)号：US20060031583A1
公开(公告)日：2006-02-09
申请号：US10535859
申请日：2003-11-20
申请人： Hiromasa Fujii , Shigeru Tomisato , Hirohito Suda , Tetsuhi Abe , Takefumi Yamada
发明人： Hiromasa Fujii , Shigeru Tomisato , Hirohito Suda , Tetsuhi Abe , Takefumi Yamada
IPC分类号： G06F15/16
CPC分类号： H04L27/2602 , H04B1/7103 , H04L27/2607 , H04L27/2608 , H04L27/261 , H04L27/2613 , H04L27/2626 , H04L27/2656 , H04L27/2662 , H04L27/2688
摘要： An object of the present invention is to provide a communications system etc., which can reduce the influence of interference from other systems which results from a difference in symbol length, in an area where a plurality of systems using different transmission methods are mixed. The present invention relates to a communications system in which a plurality of systems share the same frequency bandwidth so as to transmit information symbols. One of the plurality of systems 1 includes an identifying unit 109 configured to identify the symbol length of an information symbol transmitted in a different system 2; and an adjusting unit 102, 107 configured to adjust the symbol length of an information symbol to be transmitted, in accordance with an identified symbol length.
摘要翻译：本发明的目的是提供一种通信系统等，其可以在混合使用不同传输方式的多个系统的区域中减少由于符号长度不同而引起的其他系统的干扰的影响。本发明涉及一种通信系统，其中多个系统共享相同的频率带宽以便发送信息符号。多个系统1中的一个包括识别单元109，其被配置为识别在不同系统2中发送的信息符号的符号长度; 以及调整单元102,107，其被配置为根据所识别的符号长度来调整要发送的信息符号的符号长度。

10. 发明申请

US20050054318A1 Radio receiver, radio transmitter and impedance control method 失效
标题翻译：无线电接收机，无线电发射机和阻抗控制方法
公开(公告)号：US20050054318A1
公开(公告)日：2005-03-10
申请号：US10892147
申请日：2004-07-16
申请人： Hiromasa Fujii , Shigeru Tomisato , Hirohito Suda
发明人： Hiromasa Fujii , Shigeru Tomisato , Hirohito Suda
IPC分类号： H01Q1/24 , H01Q3/26 , H01Q3/44 , H01Q21/29 , H04B7/06 , H04B7/08 , H04L1/00 , H04L25/02 , H04B17/00 , G01S3/16 , G01S3/28 , H04B1/06 , H04B7/00 , H04M1/00
CPC分类号： H01Q21/29 , H01Q1/246 , H01Q3/2635 , H01Q3/44 , H04L1/0025 , H04L25/0202
摘要： A radio receiver includes a plurality of antenna elements for receiving a radio signal from a radio transmitter; a setting part changing an impedance of at least one of the plurality of antenna elements according to an instruction signal; a measuring part measuring a change in throughput in a received signal caused due to the change in the impedance; and an instruction part providing the instruction signal which is changed in response to the measurement result.
摘要翻译：无线电接收机包括用于从无线电发射机接收无线电信号的多个天线元件; 设置部分，根据指令信号改变所述多个天线元件中的至少一个的阻抗; 测量由于阻抗变化引起的接收信号中的吞吐量变化的测量部分; 以及提供响应于测量结果而改变的指令信号的指令部分。

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