公开(公告)号：US20070286102A1

公开(公告)日：2007-12-13

申请号：US10587181

申请日：2004-03-05

申请人： Isao Shimokawa ,  Masayuki Miyazaki ,  Akira Maeki ,  Masaaki Shida

发明人： Isao Shimokawa ,  Masayuki Miyazaki ,  Akira Maeki ,  Masaaki Shida

IPC分类号： H04B7/00

CPC分类号： H04W74/08 ,  H04W36/14 ,  H04W48/18 ,  H04W52/0206 ,  H04W52/0216 ,  H04W52/0219 ,  H04W74/006 ,  H04W80/00 ,  H04W88/06 ,  H04W92/10

摘要： A wireless communication system comprising a management server, base stations, and a plurality of node terminals, wherein a wireless communication protocol to be applied is switched dynamically based on such indices as but error, packet error rate, the number of times of retransmitting packets, throughput/power consumption that may occur between each base station and nodes.

摘要翻译： 一种无线通信系统，包括管理服务器，基站和多个节点终端，其中，基于诸如错误，分组错误率，重传分组的次数等指标动态地切换要应用的无线通信协议， 每个基站和节点之间可能发生的吞吐量/功耗。

公开(公告)号：US20060140253A1

公开(公告)日：2006-06-29

申请号：US11316729

申请日：2005-12-27

申请人： Akira Maeki ,  Ryosuke Fujiwara ,  Masaaki Shida ,  Masaru Kokubo ,  Takayasu Norimatsu

发明人： Akira Maeki ,  Ryosuke Fujiwara ,  Masaaki Shida ,  Masaru Kokubo ,  Takayasu Norimatsu

IPC分类号： H04B1/707 ,  H04B1/69

CPC分类号： H04B1/7174

摘要： An ultra-wideband transmitter is provided which can reduce a leak of a local signal into a transmitted signal with a pulse train output from an antenna in UWB-IR communication. The transmitter comprises a pulse generator 0140 for generating a pulse signal having a pulse train of pulses produced intermittently according to data to be transmitted, an oscillator 0120 for producing a local signal, a frequency converter 0130 to which the pulse signal output from the pulse generator and the local signal output from the oscillator are input, and for frequency-converting the pulse signal to output a RF signal, an amplifier 0110 for amplifying the RF signal output from the frequency converter, and an antenna 0000 for emitting the RF signal output from the amplifier in the air. In a period corresponding to a pause period of the pulses produced intermittently, a leak of the local signal into the RF signal output from the antenna is reduced using a control signal 0300.

摘要翻译： 提供了一种超宽带发射器，其可以通过在UWB-IR通信中从天线输出的脉冲串来减少本地信号泄漏到发射信号中。 发射机包括脉冲发生器0140，用于根据要发射的数据产生具有间歇产生的脉冲脉冲串的脉冲信号;振荡器0120，用于产生本地信号;频率转换器0130，从脉冲发生器输出的脉冲信号 并输入从振荡器输出的本地信号，为了对脉冲信号进行频率转换以输出RF信号，放大器0110用于放大从频率转换器输出的RF信号，以及用于发射RF信号的天线0000 放大器在空气中。 在对应于间歇产生的脉冲的暂停时段的时间段内，使用控制信号0300，将本地信号的泄漏从天线输出的RF信号中减少。

公开(公告)号：US09100082B2

公开(公告)日：2015-08-04

申请号：US13137332

申请日：2011-08-05

申请人： Masaaki Shida

发明人： Masaaki Shida

IPC分类号： H04B7/14 ,  H04B3/36 ,  H04B7/155 ,  H04B7/26 ,  H04W16/26

CPC分类号： H04B7/155 ,  H04B7/2606 ,  H04W16/26

摘要： A radio communication system for a communication between a base station and a mobile terminal. The radio communication system repeats a signal transmitted from the base station at repeaters that are multistage-connected by a leaky coaxial cable. Each repeater converts a frequency of an input signal into a different frequency and outputs the frequency-converted signal to the leaky coaxial cable connected to the repeater. The repeaters are provided between the leaky coaxial cables connected in series.

摘要翻译： 一种用于基站和移动终端之间的通信的无线电通信系统。 无线电通信系统重复从基站通过泄漏同轴电缆多级连接的转发器发送的信号。 每个中继器将输入信号的频率转换成不同的频率，并将频率转换的信号输出到与中继器连接的泄漏同轴电缆。 中继器设置在串联连接的泄漏同轴电缆之间。

公开(公告)号：US20110033005A1

公开(公告)日：2011-02-10

申请号：US12923852

申请日：2010-10-12

申请人： Shigenori Hayase ,  Masaaki Shida ,  Keisuke Yamamota

发明人： Shigenori Hayase ,  Masaaki Shida ,  Keisuke Yamamota

IPC分类号： H04B7/02 ,  H04L27/00

CPC分类号： H04B7/0854 ,  H04B7/0615

摘要： In a MIMO wireless communication system, the transformation process synthesizes the eigenmodes having a large singular value (i.e. a high effective SNR) and the eigenmodes having a small singular value (i.e. a low effective SNR). Thereby, the former eigenmodes are converted into modes having suppressed effective SNR which do not require a large number of levels of modulation, and the latter eigenmodes are converted into modes having increased effective SNR instead. In a MIMO wireless communication system for eigenmode transmission, a large communication capacity is realized without increasing the number of levels of modulation even in a communication environment capable of achieving a high SNR.

摘要翻译： 在MIMO无线通信系统中，变换过程合成具有大奇异值（即高有效SNR）的本征模和具有小奇异值的本征模（即低有效SNR）。 因此，前者本征模式被转换为具有抑制的有效SNR的模式，其不需要大量的调制电平，并且后者本征模式被转换成具有增加的有效SNR的模式。 在用于本征模式传输的MIMO无线通信系统中，即使在能够实现高SNR的通信环境中也可实现大的通信容量而不增加调制电平的数量。

公开(公告)号：US20090060070A1

公开(公告)日：2009-03-05

申请号：US12175572

申请日：2008-07-18

申请人： Shigenori Hayase ,  Takashi Yano ,  Masaaki Shida ,  Keisuke Yamamoto ,  Yunjian Jia

发明人： Shigenori Hayase ,  Takashi Yano ,  Masaaki Shida ,  Keisuke Yamamoto ,  Yunjian Jia

IPC分类号： H04L27/28 ,  H04L25/49

CPC分类号： H04L27/2623 ,  H04L5/0023 ,  H04L5/006 ,  H04L25/0224 ,  H04L27/2626 ,  H04L27/2647

摘要： A method for suppressing the peak-to-average power ratio (PAPR) while limiting deterioration in signal characteristics in wireless communication devices utilizing wireless communication methods (OFDM method, MIMO method) for multiplexing and sending multiple signals. A weight calculator unit sets a large weight for transmit signals whose channel quality is poor, relative to the weight of each base component based on the acquired channel quality. A peak detector unit detects the peak from the signal string after unitary conversion, and extracts a distortion component to apply for suppressing the peak. A peak suppression signal generation unit calculates the peak signal from the distortion component and weight of each base component, to add to each base component, and adds the peak suppression signal to each base component prior to unitary transformation.

摘要翻译： 一种抑制峰值与平均功率比（PAPR）的方法，同时利用用于复用和发送多个信号的无线通信方法（OFDM方法，MIMO方法）来限制无线通信装置中的信号特性的劣化。 权重计算器单元基于所获取的信道质量，相对于每个基本分量的权重，对信道质量差的发送信号设置较大的权重。 峰值检测器单元在单位转换之后从信号串检测峰值，并提取失真分量以应用于抑制峰值。 峰值抑制信号生成单元根据每个基本分量的失真分量和权重来计算峰值信号，以添加到每个基本分量，并且在单一变换之前将峰值抑制信号加到每个基本分量。

公开(公告)号：US20080267133A1

公开(公告)日：2008-10-30

申请号：US12032046

申请日：2008-02-15

申请人： Masaaki Shida ,  Takashi Yano ,  Shigenori Hayase ,  Keisuke Yamamoto

发明人： Masaaki Shida ,  Takashi Yano ,  Shigenori Hayase ,  Keisuke Yamamoto

IPC分类号： H04Q7/20

CPC分类号： H04B7/0874 ,  H04B7/0626 ,  H04B7/0643 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0057 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/06

摘要： When a plurality of user stations (STAs) simultaneously communicate with an access point (AP) through an SDMA (Space Division Multiple Access) channel in a MIMO wireless communication system, these STAs control their respective transmission signals such that each signal is received by only a different one of the plurality of antennas at the AP. (It should be noted that the number of these STAs is equal to or smaller than the number of antennas at the AP.) This eliminates the need for the AP to perform MIMO processing, thereby allowing the AP to properly receive and demodulate the signals even if they differ in carrier frequency and transmission timing, which would otherwise result in communication degradation or failure.

摘要翻译： 当多个用户站（STA）通过MIMO无线通信系统中的SDMA（空分多址）信道同时与接入点（AP）通信时，这些STA控制它们各自的传输信号，使得每个信号仅被接收 在AP处的多个天线中的不同的天线。 （应当注意，这些STA的数量等于或小于AP处的天线数量）。这消除了对AP进行MIMO处理的需要，从而允许AP正确地接收和解调信号，甚至 如果它们在载波频率和传输时间上不同，否则将导致通信衰减或故障。

公开(公告)号：US20070086400A1

公开(公告)日：2007-04-19

申请号：US11493556

申请日：2006-07-27

申请人： Masaaki Shida ,  Shigenori Hayase ,  Tomoaki Ishifuji

发明人： Masaaki Shida ,  Shigenori Hayase ,  Tomoaki Ishifuji

IPC分类号： H04Q7/24

CPC分类号： H04L27/2649 ,  H04B7/0417 ,  H04B7/0626 ,  H04L25/0204 ,  H04L27/2657 ,  H04L27/2662 ,  H04L2025/03426 ,  H04L2027/0024

摘要： Disclosed is a wireless communication system capable of performing demodulation at the receiving side without substantially deteriorating BER characteristics, regardless of carrier frequency error existing among plural wireless communication systems in SDMA of uplink. The wireless communication system includes plural antennas; a MIMO processor that decomposes a reception signal the plural antennas received from plural transmitters into transmission signals transmitted from the respective transmitters; a FFT processor that carries out OFDM demodulation; and a demapping unit that obtains data from signals which were previously converted into sub-carrier signals by the FFT processor, in which the MIMO processor is installed ahead of the FFT processor for sake of the processing sequence of a receive signal, and even though a carrier frequency offset exists in the reception signal MIMO processing is performed prior to OFDM demodulation to split the reception signal from plural transmitters.

摘要翻译： 公开了无论在上行链路的SDMA中的多个无线通信系统中存在的载波频率误差如何，都能够在接收侧进行解调而不使BER特性实质恶化的无线通信系统。 无线通信系统包括多个天线; 将从多个发射机接收的多个天线的接收信号分解为从各个发射机发射的传输信号的MIMO处理器; 执行OFDM解调的FFT处理器; 以及解映射单元，其通过FFT处理器从先前被转换为子载波信号的信号获得数据，其中为处理接收信号的处理顺序而将MIMO处理器安装在FFT处理器之前，并且即使 载波频率偏移存在于接收信号中，在OFDM解调之前执行MIMO处理，以分割来自多个发射机的接收信号。

公开(公告)号：US20060128414A1

公开(公告)日：2006-06-15

申请号：US11295582

申请日：2005-12-07

申请人： Masaaki Shida ,  Kei Suzuki ,  Mikio Kuwahara

发明人： Masaaki Shida ,  Kei Suzuki ,  Mikio Kuwahara

IPC分类号： H04B7/00

CPC分类号： H04W52/283 ,  H04W52/0245 ,  H04W52/287 ,  Y02D70/166

摘要： In a wireless communication system having a base station and a terminal, it is important to extend the operating life of the terminal in the case of using a battery as the power supply of the terminal. Particularly in the case where a state in which a base station is not present in the range within which the terminal can communicate lasts long, the reduction of the electric power consumption during the standby of the terminal becomes an issue. The terminal monitors the received signal power strength of a signal transmitted by the base station. When the power strength exceeds a prescribed value, it is considered that the base station is present and the base station performs operations for carrying out communication with the base station.

摘要翻译： 在具有基站和终端的无线通信系统中，在使用电池作为终端的电源的情况下，延长终端的使用寿命是重要的。 特别是在终端能够通信的范围内不存在基站的状态持续时间长的情况下，终端待机时的电力消耗的减少成为问题。 终端监视由基站发送的信号的接收信号功率强度。 当功率强度超过规定值时，认为基站存在，并且基站执行与基站进行通信的操作。

公开(公告)号：US08155219B2

公开(公告)日：2012-04-10

申请号：US12175572

申请日：2008-07-18

申请人： Shigenori Hayase ,  Takashi Yano ,  Masaaki Shida ,  Keisuke Yamamoto ,  Yunjian Jia

发明人： Shigenori Hayase ,  Takashi Yano ,  Masaaki Shida ,  Keisuke Yamamoto ,  Yunjian Jia

IPC分类号： H04K1/10

CPC分类号： H04L27/2623 ,  H04L5/0023 ,  H04L5/006 ,  H04L25/0224 ,  H04L27/2626 ,  H04L27/2647

摘要： A method for suppressing the peak-to-average power ratio (PAPR) while limiting deterioration in signal characteristics in wireless communication devices utilizing wireless communication methods (OFDM method, MIMO method) for multiplexing and sending multiple signals. A weight calculator unit sets a large weight for transmit signals whose channel quality is poor, relative to the weight of each base component based on the acquired channel quality. A peak detector unit detects the peak from the signal string after unitary conversion, and extracts a distortion component to apply for suppressing the peak. A peak suppression signal generation unit calculates the peak signal from the distortion component and weight of each base component, to add to each base component, and adds the peak suppression signal to each base component prior to unitary transformation.

摘要翻译： 一种抑制峰值与平均功率比（PAPR）的方法，同时利用用于复用和发送多个信号的无线通信方法（OFDM方法，MIMO方法）来限制无线通信装置中的信号特性的劣化。 权重计算器单元基于所获取的信道质量，相对于每个基本分量的权重，对信道质量差的发送信号设置较大的权重。 峰值检测器单元在单位转换之后从信号串检测峰值，并提取失真分量以应用于抑制峰值。 峰值抑制信号生成单元根据每个基本分量的失真分量和权重来计算峰值信号，以添加到每个基本分量，并且在单一变换之前将峰值抑制信号加到每个基本分量。

公开(公告)号：US20070274256A1

公开(公告)日：2007-11-29

申请号：US11797321

申请日：2007-05-02

申请人： Shinji Murai ,  Tomoaki Ishifuji ,  Takashi Yano ,  Masaaki Shida ,  Shigenori Hayase

发明人： Shinji Murai ,  Tomoaki Ishifuji ,  Takashi Yano ,  Masaaki Shida ,  Shigenori Hayase

IPC分类号： H04Q7/00

CPC分类号： H04W72/085 ,  H04W28/18 ,  H04W72/046

摘要： In a wireless communication system for communicating with a plurality of stations at the same point of time with the same frequency using a Space Division Multiple Access (SDMA), wireless resources are allocated by a first decision unit which evaluates performance of each station obtained when the SDMA is used and which determines periods of time to be allocated to groups of stations formed according to the SDMA technique. Using a first evaluation unit and a second evaluation unit to evaluate performance required by each station and each application, the first decision unit allocates the wireless resources to the stations. It is therefore possible that the wireless resources are efficiently allocated to the stations while preventing an event in which the wireless resources are excessive or insufficient for required quality of service.

摘要翻译： 在用于使用空分多址（SDMA）以相同频率在同一时间点与多个站进行通信的无线通信系统中，无线资源由第一决策单元分配，该第一决策单元评估当 使用SDMA，并确定要分配给根据SDMA技术形成的站组的时间段。 使用第一评估单元和第二评估单元来评估每个站点和每个应用所需的性能，第一决策单元向站点分配无线资源。 因此，可以将无线资源有效地分配给站，同时防止无线资源过多或不足以满足所需服务质量的事件。