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1. 发明授权

US07075912B2 Wireless communication system using access points that can be freely set up by users 失效
公开(公告)号：US07075912B2
公开(公告)日：2006-07-11
申请号：US10099038
申请日：2002-03-15
申请人： Hirohito Suda , Masayoshi Nakayama , Katsutoshi Nidaira , Shuichi Yoshino , Masahiro Umehira , Eisuke Kudo , Syuji Kubota
发明人： Hirohito Suda , Masayoshi Nakayama , Katsutoshi Nidaira , Shuichi Yoshino , Masahiro Umehira , Eisuke Kudo , Syuji Kubota
IPC分类号： G04Q7/00
CPC分类号： H04W84/045
摘要： In a wireless communication system formed by a plurality of access points constituting a wireless network, through which user terminals make accesses, and at least one control station configured to control the access points, public access points are systematically set up by a manager of the control station, while user's personal access points to be freely set up by users at desired locations according to needs of users are accommodated by operating the control station to measure a utilization level of each user's personal access point and charge an owner of each user's personal access point according to a measured utilization level and set up relay routes using the public access points and the user's personal access points.

2. 发明授权

US06330699B1 Error compensating method and apparatus and medium storing an error compensating program 失效
标题翻译：误差补偿方法和装置以及存储误差补偿程序的介质
公开(公告)号：US06330699B1
公开(公告)日：2001-12-11
申请号：US09628301
申请日：2000-07-28
申请人： Masafumi Yoshioka , Atsushi Ohta , Masahiro Umehira
发明人： Masafumi Yoshioka , Atsushi Ohta , Masahiro Umehira
IPC分类号： G06F1100
CPC分类号： H04L1/1628 , H04L1/1809 , H04L2001/125
摘要： An object of the present invention is to improve the transmission efficiency and reduce circuit size in error compensating techniques where bit errors occurring during transmission are compensated for by retransmission. Transmission equipment get sequence number(s) from control information and sequence numbers which follows from the sequence number which correspond to newest data packet amongst the sequence numbers. and transmits data packet corresponding to these sequence numbers at a predetermined timing. On the other hand, reception equipment receives data packet from the transmission equipment, and manages the sequence numbers of not yet received data packets. The reception equipment then sends back sequence number(s) of predetermined number, which is smaller number than the maximum number of data packets which is sent from transmission equipment at a predetermined timing, which correspond to not yet received data packet as control Information for each predetermined timing.
摘要翻译：本发明的一个目的是提高传输效率并减少误差补偿技术中的电路尺寸，其中通过重发来补偿发送期间发生的位错误。传输设备从控制信息和序列号获得序列号，后者是序列号对应于序列号中的最新数据分组。并在预定定时发送与这些序列号对应的数据包。另一方面，接收设备从传输设备接收数据分组，并管理尚未接收的数据分组的序列号。然后，接收设备发送预定号码的序列号，该序列号比预定定时从传输设备发送的数据分组的最大数量少，对应于尚未接收的数据分组，作为每个的控制信息预定定时。

3. 发明授权

US5245340A Digital transmultiplexer with automatic threshold controller 失效
标题翻译：具有自动阈值控制器的数字多路复用器
公开(公告)号：US5245340A
公开(公告)日：1993-09-14
申请号：US835356
申请日：1992-02-14
申请人： Chun Loo , Masahiro Umehira
发明人： Chun Loo , Masahiro Umehira
IPC分类号： H03M1/06 , H03M1/12 , H04L5/06
CPC分类号： H04L5/06 , H03M1/0607 , H03M1/12
摘要： A group demodulator for FDMA/PSK input signals comprising a down-converter for the input signals to convert these signals into in-phase and quadrature-related signals which are applied through analog-to-digital converters to a digital transmultiplexer. The digital transmultiplexer converts the signals into a number of channels of PSK modulated data. The output of each analog-to-digital converter is applied to an automatic threshold controller which detects the statistical bias of the input signal amplitude. Each automatic threshold controller provides an analog reference signal which is applied to a reference input of the associated analog-to-digital converter. The reference signal corrects any DC offset error for the analog-to-digital converter and prevents degradation in energy per bit-to-noise density ratio.
摘要翻译：用于FDMA / PSK输入信号的组解调器，包括用于输入信号的下变频器，以将这些信号转换成通过模数转换器施加到数字多路复用器的同相和正交相关信号。数字多路复用器将信号转换成多个PSK调制数据通道。每个模拟 - 数字转换器的输出被应用于检测输入信号幅度的统计偏差的自动阈值控制器。每个自动阈值控制器提供模拟参考信号，该参考信号被施加到相关模数转换器的参考输入。参考信号校正模数转换器的任何DC偏移误差，并防止每比特噪声密度比下的能量降级。

4. 发明授权

US07242720B2 OFDM signal communication system, OFDM signal transmitting device and OFDM signal receiving device 有权
标题翻译： OFDM信号通信系统，OFDM信号发送装置和OFDM信号接收装置
公开(公告)号：US07242720B2
公开(公告)日：2007-07-10
申请号：US10117390
申请日：2002-04-05
申请人： Takatoshi Sugiyama , Yusuke Asai , Satoshi Kurosaki , Masahiro Umehira , Daisei Uchida , Yasuo Suzuki
发明人： Takatoshi Sugiyama , Yusuke Asai , Satoshi Kurosaki , Masahiro Umehira , Daisei Uchida , Yasuo Suzuki
IPC分类号： H04K1/10 , H04B7/02
CPC分类号： H04L27/2662 , H04L1/06 , H04L27/2602 , H04L27/2637 , H04L27/2657 , H04L27/2679 , H04L2027/0026 , H04L2027/0087
摘要： An OFDM signal communication system used in broadband mobile communication, achieves stable operation under severe frequency selective fading environments, giving high quality. The OFDM signal communication system which transmits OFDM signals over the same radio frequency from N transmitting antennas, has an inverse matrix computer for computing an N×N inverse matrix constituted by propagation coefficients for respective propagation paths between each of N transmitting antennas and each of N receiving antennas, and a subcarrier demodulator which separates the signals of the respective propagation paths, based on the obtained inverse matrix.
摘要翻译：宽带移动通信中使用的OFDM信号通信系统，在严重频率选择性衰落环境下实现稳定运行，提供高质量。从N个发射天线在相同射频上发送OFDM信号的OFDM信号通信系统具有逆矩阵计算机，用于计算由N个发射天线和N个接收天线中的每一个之间的各个传播路径的传播系数构成的N×N逆矩阵以及基于所获得的逆矩阵来分离各个传播路径的信号的副载波解调器。

5. 发明授权

US06512747B1 ATM transmission system 失效
标题翻译： ATM传输系统
公开(公告)号：US06512747B1
公开(公告)日：2003-01-28
申请号：US09262111
申请日：1999-03-04
申请人： Makoto Umeuchi , Masamitsu Nakura , Masahiro Umehira
发明人： Makoto Umeuchi , Masamitsu Nakura , Masahiro Umehira
IPC分类号： H04B700
CPC分类号： H04Q11/0478 , H04L2012/5648
摘要： In an ATM transmission system in which a plurality of ATM cells are grouped to a packet with an end of ATM cell having an EOP (End Of Packet) flag, a transmitting station comprises a transmit buffer for storing temporarily ATM cells to be transmitted, a transmit cell process means which discards all the ATM cells in the group in case that a NAK response indicating loss or wrong reception of an ATM cell is received from a receiving station, and an EOP cell generator for transmitting an EOP cell which has said EOP flag in stead of the discarded ATM cells. As no ATM cell in a packet is transmitted after an erroneous ATM cell is detected, no useless ATM cell which would be discarded in a destination terminal equipment because of an erroneous ATM cell occupies a transmission line when an erroneous ATM cell is detected, and traffic is saved.
摘要翻译：在ATM传输系统中，其中多个ATM信元被分组成具有一个具有EOP（分组结束）标志的ATM信元的一端的分组，发送站包括用于临时存储要发送的ATM信元的发送缓冲器，在从接收站接收到指示ATM信元的丢失或错误接收的NAK响应的情况下丢弃组中的所有ATM信元的发送小区处理装置，以及用于发送具有所述EOP标志的EOP小区的EOP小区发生器而不是丢弃的ATM信元。由于在检测到错误的ATM信元之后没有发送分组中的ATM信元，所以当检测到错误的ATM信元时，由于错误的ATM信元而在目的地终端设备中被丢弃的无用ATM信元占用传输线，并且流量被保存。

6. 发明申请

US20090285137A1 WIRELESS TRANSMITTING APPARATUS, WIRELESS RECEIVING APPARATUS, WIRELESS TRANSMISSION METHOD, WIRELESS RECEPTION METHOD, WIRELESS COMMUNICATION SYSTEMS, AND WIRELESS COMMUNICATION METHOD 有权
标题翻译：无线传输设备，无线接收设备，无线传输方法，无线接收方法，无线通信系统和无线通信方法
公开(公告)号：US20090285137A1
公开(公告)日：2009-11-19
申请号：US11990807
申请日：2006-09-05
申请人： Takafumi Fujita , Daisei Uchida , Yosuke Fujino , Osamu Kagami , Masahiro Umehira
发明人： Takafumi Fujita , Daisei Uchida , Yosuke Fujino , Osamu Kagami , Masahiro Umehira
IPC分类号： H04B7/00 , H04L27/00
CPC分类号： H04L27/3836 , H04L25/0226 , H04L25/0232 , H04L27/261 , H04L27/2656 , H04L27/2657 , H04L27/2675 , H04L27/2692 , H04L27/2695 , H04L2027/0065 , H04L2027/0093
摘要： A wireless transmitting apparatus inserts a training signal into a transmission burst at fixed symbol intervals as a pilot signal, a wireless receiving apparatus performs AD conversion of a received burst signal, performs symbol timing recovery, performs frame position detection and pilot signal extraction from the received burst signal for which symbol timing was established, performs frame synchronization, and performs a carrier frequency estimation using pilot signal. A carrier frequency estimation is also performed with respect to a received burst signal for which frame synchronization was established, and channel distortion is estimated and output based on a frequency-corrected received burst signal. Channel distortion estimation is then performed with respect to a frequency-corrected received burst signal, and a data symbol sequence of the channel-compensated received burst signal is converted to a received data bit stream.
摘要翻译：无线发送装置将训练信号作为导频信号以固定符号间隔插入传输脉冲串，无线接收装置对接收到的脉冲串信号进行AD转换，进行符号定时恢复，从接收到的帧中进行帧位置检测和导频信号提取建立符号定时的突发信号执行帧同步，并使用导频信号进行载波频率估计。还针对建立了帧同步的接收的脉冲串信号执行载波频率估计，并且基于经频率校正的接收突发信号来估计和输出信道失真。然后对频率校正的接收脉冲串信号执行信道失真估计，并且将信道补偿的接收脉冲信号的数据符号序列转换为接收的数据比特流。

7. 发明授权

US06188697B1 ATM cell transport system for wireless communications 失效
标题翻译：用于无线通信的ATM信元传输系统
公开(公告)号：US06188697B1
公开(公告)日：2001-02-13
申请号：US08864783
申请日：1997-05-29
申请人： Masahiro Umehira , Hijin Satoh , Takatoshi Sugiyama , Atsushi Ohta , Yuichi Sagawa
发明人： Masahiro Umehira , Hijin Satoh , Takatoshi Sugiyama , Atsushi Ohta , Yuichi Sagawa
IPC分类号： H04L1256
CPC分类号： H04Q11/0478 , H04L2012/5607 , H04L2012/5649 , H04L2012/5651 , H04L2012/5672 , H04L2012/5681
摘要： An asynchronous transfer mode (“ATM”) cell transfer system in a wireless communication system provides quality classes that correspond to the amount of cell transfer delay allowed. Cells are classified according to a quality class and stored in buffers. The cells are read starting from the buffer for the quality class with the highest priority, and successively from buffers for quality classes of lower priority. Alternatively, if there is room in the output interval of cells of a higher priority quality class, cells of a lower quality class are inserted among these cells.
摘要翻译：无线通信系统中的异步传输模式（“ATM”）小区传送系统提供与允许的小区传输延迟量对应的质量等级。细胞根据质量等级分类并存储在缓冲液中。从具有最高优先级的质量等级的缓冲器开始读取单元，并从缓冲器连续读取较低优先级的质量等级。或者，如果在较高优先级质量等级的单元的输出间隔中存在空间，则在这些单元之间插入较低质量等级的单元。

8. 发明授权

US5862175A Digital transmission apparatus using differential coding and forward error correction 失效
标题翻译：使用差分编码和前向纠错的数字传输装置
公开(公告)号：US5862175A
公开(公告)日：1999-01-19
申请号：US753726
申请日：1996-11-29
申请人： Takatoshi Sugiyama , Masahiro Umehira
发明人： Takatoshi Sugiyama , Masahiro Umehira
IPC分类号： H04L1/00 , H04L27/18 , H04B1/38 , H04B7/216 , H04J3/24 , H04L23/02
CPC分类号： H04L1/0047 , H04L1/0042 , H04L27/18 , H04L1/0058 , H04L1/0071
摘要： A digital transmission apparatus is provided, by which the amount of transmission delay and circuit miniaturization can be realized in the case of using an FEC method together with a differential coding method. In the digital transmission apparatus, a digital signal to be transmitted is serial-to-parallel-converted into parallel n-channel signals; each signal is FEC-encoded and encoded signals are then differentially encoded; and a carrier is modulated by the parallel n-channel differentially-encoded signals to be transmitted as a 2.sup.n multi-level modulated signal. The signal is detected at the receiving side and parallel n-channel demodulated and decoded signals are output; FEC decoding is performed; and the parallel n-channel digital signals after FEC decoding is parallel-to-serial-converted. When block coding is used as an FEC method, parallel n-channel digital signals to be transmitted are respectively processed by block-encoding of the same logic; the parallel n-channel signals after encoding are differentially encoded; and a carrier is modulated by the parallel n-channel differentially-encoded signals to be transmitted as a 2.sup.n multi-level modulated signal. At the receiving side, parallel n-channel signals after detection are stored; syndrome data for detecting an error bit position for each signal is calculated; and based on the syndrome data, time-series detection of each error bit position is performed so as to correct the errors included in the stored signals.
摘要翻译：提供一种数字传输装置，通过该数字传输装置，在使用FEC方法和差分编码方法的情况下，可以实现传输延迟量和电路小型化。在数字发送装置中，要发送的数字信号被串行 - 并行转换为并行的n信道信号; 每个信号被FEC编码，然后对编码的信号进行差分编码; 并且载波由并行的n信道差分编码信号调制以作为2n多级调制信号发送。在接收端检测信号，并输出并行的n信道解调和解码信号; 执行FEC解码; 并且FEC解码之后的并行n信道数字信号被并行到串行转换。当块编码被用作FEC方法时，要发送的并行n信道数字信号分别通过相同逻辑的块编码来处理; 编码后的并行n信道信号进行差分编码; 并且载波由并行的n信道差分编码信号调制以作为2n多级调制信号发送。在接收侧，存储检测后的并行n信道信号; 计算用于检测每个信号的错误位位置的校正数据; 并且基于校正子数据，执行每个错误位位置的时间序列检测，以校正存储的信号中包括的错误。

9. 发明授权

US08248975B2 Wireless transmitting apparatus, wireless receiving apparatus, wireless transmission method, wireless reception method, wireless communication system, and wireless communication method 有权
标题翻译：无线发送装置，无线接收装置，无线发送方法，无线接收方法，无线通信系统和无线通信方式
公开(公告)号：US08248975B2
公开(公告)日：2012-08-21
申请号：US11990807
申请日：2006-09-05
申请人： Takafumi Fujita , Daisei Uchida , Yosuke Fujino , Osamu Kagami , Masahiro Umehira
发明人： Takafumi Fujita , Daisei Uchida , Yosuke Fujino , Osamu Kagami , Masahiro Umehira
IPC分类号： H04B7/00
CPC分类号： H04L27/3836 , H04L25/0226 , H04L25/0232 , H04L27/261 , H04L27/2656 , H04L27/2657 , H04L27/2675 , H04L27/2692 , H04L27/2695 , H04L2027/0065 , H04L2027/0093
摘要： A wireless transmitting apparatus inserts a training signal into a transmission burst at fixed symbol intervals as a pilot signal, a wireless receiving apparatus performs AD conversion of a received burst signal, performs symbol timing recovery, performs frame position detection and pilot signal extraction from the received burst signal for which symbol timing was established, performs frame synchronization, and performs a carrier frequency estimation using pilot signal. A carrier frequency estimation is also performed with respect to a received burst signal for which frame synchronization was established, and channel distortion is estimated and output based on a frequency-corrected received burst signal. Channel distortion estimation is then performed with respect to a frequency-corrected received burst signal, and a data symbol sequence of the channel-compensated received burst signal is converted to a received data bit stream.
摘要翻译：无线发送装置将训练信号作为导频信号以固定符号间隔插入传输脉冲串，无线接收装置对接收到的脉冲串信号进行AD转换，进行符号定时恢复，从接收到的帧中进行帧位置检测和导频信号提取建立符号定时的突发信号执行帧同步，并使用导频信号进行载波频率估计。还针对建立了帧同步的接收的脉冲串信号执行载波频率估计，并且基于经频率校正的接收突发信号来估计和输出信道失真。然后对频率校正的接收脉冲串信号执行信道失真估计，并且将信道补偿的接收脉冲信号的数据符号序列转换为接收的数据比特流。

10. 发明申请

US20060061511A1 Active antenna 审中-公开
标题翻译：有源天线
公开(公告)号：US20060061511A1
公开(公告)日：2006-03-23
申请号：US10534530
申请日：2003-11-17
申请人： Takashi Enoki , Tomohiro Seki , Takeo Atsugi , Masahiro Umehira
发明人： Takashi Enoki , Tomohiro Seki , Takeo Atsugi , Masahiro Umehira
IPC分类号： H01Q1/24
CPC分类号： H01Q21/0006 , H01Q1/02 , H01Q9/0457 , H01Q21/0025 , H01Q23/00
摘要： An MSA feeder circuit (113) that feeds power to an MSA (112) and MSA (112) is disposed on an antenna substrate (106) and a high-output amplifier (102) and low-noise amplifier (103), etc., which are active devices, are mounted on an RF substrate (107). A heat radiation block (111) is interposed between the antenna substrate (106) and the RF substrate (107). An RF-antenna connection section (105) connects an MSA feeder circuit (113) disposed on the antenna substrate (106) and a feed line (109) on the RF substrate (107) through an electromagnetic field using a non-radiation connection slot (108). In this way, even when a device with high output and large power consumption is used, it is possible to provide an active antenna which can suppress deterioration of the characteristic and which can be implemented in a simple configuration and can be downsized.
摘要翻译：向MSA（112）和MSA（112）供电的MSA馈电电路（113）设置在天线基板（106）和高输出放大器（102）和低噪声放大器（103）等上。，其是有源器件，安装在RF衬底（107）上。在天线基板（106）和RF基板（107）之间插入散热块（111）。射频天线连接部分（105）通过使用非辐射连接槽的电磁场将设置在天线基板（106）上的MSA馈电电路（113）和RF基板（107）上的馈电线（109）（108）。以这种方式，即使使用具有高输出和大功率消耗的装置，也可以提供一种有源天线，其可以抑制特性的劣化，并且可以以简单的配置实现并且可以减小尺寸。

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