公开(公告)号：US5577087A

公开(公告)日：1996-11-19

申请号：US967278

申请日：1992-10-27

申请人： Yukitsuna Furuya

发明人： Yukitsuna Furuya

IPC分类号： H04B7/26 ,  H04J3/00 ,  H04L1/00 ,  H04L27/00 ,  H04L27/34

CPC分类号： H04L27/0008 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0025 ,  H04L1/0022

摘要： In a variable modulation communication method, the transmission quality of a transmission path is monitored. If the transmission quality is good, communication is performed while the transmission time is shortened by using a multilevel modulation scheme. If the transmission quality is bad, communication is performed while the transmission time is prolonged by using a modulation scheme having a smaller number of levels than the multilevel modulation scheme. A variable modulation communication apparatus is also disclosed.

摘要翻译： 在可变调制通信方法中，监视传输路径的传输质量。 如果传输质量良好，则通过使用多级调制方案来缩短传输时间，进行通信。 如果传输质量差，则通过使用具有比多级调制方案更少的级别的调制方案来延长传输时间，从而进行通信。 还公开了一种可变调制通信装置。

公开(公告)号：US5444721A

公开(公告)日：1995-08-22

申请号：US981309

申请日：1992-11-25

申请人： Kazuhiro Okanoue ,  Akihisa Ushirokawa ,  Yukitsuna Furuya

发明人： Kazuhiro Okanoue ,  Akihisa Ushirokawa ,  Yukitsuna Furuya

IPC分类号： H04L25/08 ,  G11B20/10 ,  H03M13/23 ,  H03M13/41 ,  H04L1/06 ,  H04L25/03 ,  H04L5/22

CPC分类号： G11B20/10009 ,  H03M13/41 ,  H04L1/06 ,  H04L25/03184

摘要： A maximum likelihood sequence estimation apparatus decodes a digital data signal. The apparatus includes: a sampling device to perform sampling and to output a received signal by sampling pulses having a constant time interval T and N different sampling phases; an operation device to operate a branch metric of the received signal sampled by the N different sampling phases; and a device to perform maximum likelihood sequence estimation of the branch metric.

摘要翻译： 最大似然序列估计装置对数字数据信号进行解码。 该装置包括：采样装置，用于通过对具有恒定时间间隔T和N个不同采样相位的脉冲进行采样来执行采样并输出接收信号; 操作装置，用于操作由N个不同采样相位采样的接收信号的分支度量; 以及执行分支量度的最大似然序列估计的装置。

公开(公告)号：US5442803A

公开(公告)日：1995-08-15

申请号：US957900

申请日：1992-10-08

申请人： Yukitsuna Furuya

发明人： Yukitsuna Furuya

IPC分类号： H04W72/04 ,  H04W74/08 ,  H04W76/06 ,  H04B7/14

CPC分类号： H04W72/044 ,  H04W72/0413 ,  H04W74/0866 ,  H04W76/06

摘要： A half duplex radio communication system having including a plurality of terminal equipments and a base station for relaying communications between the terminal equipments is characterized by, in each of the terminal equipments, transmitting a transmission right demand signal upon initiation of transmission and a transmission end signal upon termination of transmission. The base station is responsive to the transmission right demand signal from the terminal equipment for assigning a transmission channel, and is responsive to the transmission end signal for releasing the channel assignment and for assigning the transmission channel for the terminal equipment newly obtaining the transmission right.

摘要翻译： 包括多个终端设备和用于中继终端设备之间的通信的基站的半双工无线电通信系统的特征在于，在每个终端设备中，在发起传输时发送传输权限请求信号和发送结束信号 终止传输。 基站响应于来自终端设备的发送权限请求信号，用于分配传输信道，并且响应于发送结束信号用于释放信道分配并为新获得发送权限的终端设备分配传输信道。

公开(公告)号：US5303226A

公开(公告)日：1994-04-12

申请号：US955320

申请日：1992-10-01

申请人： Kazuhiro Okanoue ,  Yukitsuna Furuya

发明人： Kazuhiro Okanoue ,  Yukitsuna Furuya

IPC分类号： H03H21/00 ,  H04B1/74 ,  H04B3/04 ,  H04J3/00 ,  H04J3/04 ,  H04L25/02 ,  H04L25/03 ,  H04L25/08 ,  H04L25/30 ,  H04J3/14

CPC分类号： H04L25/0232

摘要： When time-division multiplexed digital data signals are to be demodulated, symbols in a time slot and symbols in the next time slot are stored in memory. The digital data signal in each time slot includes a training sequence. Channel estimators extract channel information regarding stored signals from the signals themselves as well as from the training sequences in succeeding time slots and output the channel information to a channel information generator which combines the channel information from the channel estimators into channel information regarding the signal in the time slot. A demodulator receives the combined channel information and the stored signals and demodulates the signal in the time slot.

摘要翻译： 当时分复用数字数据信号被解调时，时隙中的符号和下一个时隙中的符号被存储在存储器中。 每个时隙中的数字数据信号包括训练序列。 信道估计器从信号本身以及随后的时隙中的训练序列中提取关于存储的信号的信道信息，并将信道信息输出到信道信息发生器，信道信息生成器将来自信道估计器的信道信息组合成关于信道估计器中的信号的信道信息 时隙。 解调器接收组合的信道信息和存储的信号，并解调时隙中的信号。

公开(公告)号：US5272447A

公开(公告)日：1993-12-21

申请号：US929709

申请日：1992-08-12

申请人： Yukitsuna Furuya ,  Soichi Tsumura

发明人： Yukitsuna Furuya ,  Soichi Tsumura

IPC分类号： H04L27/227 ,  H04L27/233 ,  H04L27/22

CPC分类号： H04L27/2337

摘要： A digital phase demodulator and digital phase demodulation method in delay detection form uses digital circuitry without a subtracter and with low power consumption. A phase measurement timing signal generator (11) outputs the phase measurement timing signal (103) produced by sampling a reception symbol cycle signal (101) by a reception signal (102) modulated to the logical level. A phase counter (31) outputs a synchronous clock signal (105) coinciding with a frequency of a reference clock (108) multiplied by n times the carrier frequency of the reception signal (102) so that the phase is synchronized with the phase measurement timing signal (103). The phase counter (14) counts the phase clock (105), and is reset by the phase measurement timing signal (103). The decoder (15) decodes a counted value (104) of the phase counter as a phase rotation quantity to the modulation data (107).

摘要翻译： 延迟检测形式的数字相位解调器和数字相位解调方法采用数字电路，无减法器，功耗低。 相位测量定时信号发生器（11）通过将调制到逻辑电平的接收信号（102）对接收符号周期信号（101）进行采样而产生的相位测量定时信号（103）。 相位计数器（31）输出与参考时钟（108）的频率相乘乘以接收信号（102）的载波频率的n倍的同步时钟信号（105），使得相位与相位测量定时 信号（103）。 相位计数器（14）对相位时钟（105）进行计数，并由相位测量定时信号（103）复位。 解码器（15）将相位计数器的计数值（104）作为相位旋转量解调到调制数据（107）。

公开(公告)号：US4764920A

公开(公告)日：1988-08-16

申请号：US719530

申请日：1985-04-03

申请人： Yukitsuna Furuya

发明人： Yukitsuna Furuya

IPC分类号： H04L12/407 ,  H04L12/64 ,  H04J3/02

CPC分类号： H04L12/413 ,  H04L12/64 ,  H04L12/40019

摘要： A multiaccess packet transmission system for transmitting both bursty and periodical packets. A packet detection circuit detects the arrival of a first periodical packet and predicts the time of arrival of the next periodical packet for reserving the transmission path at the predicted time. Bursty packets are transmitted only when the transmission path is idle and not reserved.

摘要翻译： 一种用于传送突发和周期性分组的多址分组传输系统。 分组检测电路检测第一周期性分组的到达并且预测下一个周期性分组的到达时间以在预测时间保留传输路径。 只有当传输路径空闲而不保留时，才会传输突发数据包。

公开(公告)号：US4742568A

公开(公告)日：1988-05-03

申请号：US872502

申请日：1986-06-10

申请人： Yukitsuna Furuya

发明人： Yukitsuna Furuya

IPC分类号： H04B7/08 ,  H04B1/10

CPC分类号： H04B7/0814

摘要： A receiver comprising a switching circuit responsive to an antenna switching signal for switching between two antennas to produce a received signal, a noise estimating circuit for estimating the quantity of noise from the received signal, and an integrating circuit for integrating the noise to produce a first control signal which serves as the antenna switching signal.

摘要翻译： 一种接收机，包括响应于用于在两个天线之间切换以产生接收信号的天线切换信号的开关电路，用于从接收信号估计噪声量的噪声估计电路，以及用于积分噪声以产生第一 用作天线切换信号的控制信号。

公开(公告)号：USRE36309E

公开(公告)日：1999-09-21

申请号：US326396

申请日：1994-10-20

申请人： Toshihito Kanai ,  Yukitsuna Furuya

发明人： Toshihito Kanai ,  Yukitsuna Furuya

IPC分类号： H04W36/08 ,  H04W72/04 ,  H04Q7/22 ,  H04B7/212 ,  H04Q7/32

CPC分类号： H04W36/0083 ,  H04W36/0094

摘要： According to a handoff method for a cellular digital mobile communication system, a communication test of a new channel is performed by utilizing a free time of a time-divisionally multiplexed channel. A mobile station of this invention includes a communication circuit for performing communication by using a time-divisionally multiplexed channel, a switching circuit for connecting a new channel during a free time of the time-divisionally multiplexed channel, and a communication test circuit for performing a communication test when the switching circuit is connected to the new channel.

摘要翻译： 根据蜂窝数字移动通信系统的切换方法，通过利用时分复用信道的空闲时间来执行新信道的通信测试。 本发明的移动台包括：通过使用时分多路复用信道进行通信的通信电路，在时分复用信道的空闲时间期间连接新信道的切换电路，以及用于执行时分复用信道的通信测试电路 当开关电路连接到新通道时进行通信测试。

公开(公告)号：US5590404A

公开(公告)日：1996-12-31

申请号：US337471

申请日：1994-11-08

申请人： Toshifumi Sato ,  Yukitsuna Furuya

发明人： Toshifumi Sato ,  Yukitsuna Furuya

IPC分类号： H04B7/06 ,  H04W16/24 ,  H04W72/08 ,  H04W88/08 ,  H04B7/04

CPC分类号： H04W88/08 ,  H04B7/0608 ,  H04W16/24 ,  H04W72/08

摘要： It is an object of the present invention to provide a base station transmission-reception apparatus wherein an increase in the number of sectors does not increase the load to a control center arising from hand-over between sectors and does not increase the number of processing sections for each channel. In the apparatus, each of baseband signal processing sections 1-1 to 1-N includes a transmission signal selection circuit 202 for outputting a transmission signal from a transmission signal processing section 201 to only a sector antenna 107 indicated by a selection signal, a reception signal selection circuit 204 for selecting a reception signal of a sector indicated by the selection signal, a reception signal processing section 203 for detecting reception data corresponding to its own communication channel from the reception signal from a reception signal selection circuit 204, and a control section 207 for providing the selection signal to the transmission signal selection circuit and the reception signal selection circuit.

摘要翻译： 本发明的目的是提供一种基站发送接收装置，其中扇区数的增加不会增加由扇区之间的切换引起的对控制中心的负担，并且不增加处理部分的数量 为每个通道。 在该装置中，基带信号处理部1-1〜1-N中的每一个包括：发送信号选择电路202，用于将发送信号从发送信号处理部201输出到仅由选择信号表示的扇区天线107，接收 信号选择电路204，用于选择由选择信号表示的扇区的接收信号;接收信号处理部分203，用于根据来自接收信号选择电路204的接收信号检测与其自己的通信信道对应的接收数据;以及控制部分 207，用于向发送信号选择电路和接收信号选择电路提供选择信号。

公开(公告)号：US5420863A

公开(公告)日：1995-05-30

申请号：US87887

申请日：1993-07-09

申请人： Masanori Taketsugu ,  Yukitsuna Furuya

发明人： Masanori Taketsugu ,  Yukitsuna Furuya

IPC分类号： H04W36/12 ,  H04W88/18 ,  H04J3/16

CPC分类号： H04W36/12 ,  H04W88/181

摘要： In a TDMA cellular mobile communication system, incoming signals from the public switched network are converted by speech coder/data compressor units of a MTSO (mobile telephone switching office) to low-bit-rate signals and combined into a first TDM signal for transmission to a base station. The components of the first TDM signal are respectively routed according to a channel assignment signal and fed into desired modulators which are periodically activated according to the channel assignment signal to transmit signals on assigned channels to mobile units. Signals from the mobile units are received by demodulators at the base station and combined into a second TDM signal which is transmitted to the MTSO. The components of the second TDM signal are routed according to the channel assignment signal to appropriate speech decoder/data expander units for conversion to the original high-bit-rate signals for transmission to the network.

摘要翻译： 在TDMA蜂窝移动通信系统中，来自公共交换网络的输入信号由MTSO（移动电话交换局）的语音编码器/数据压缩器单元转换为低比特率信号，并组合成第一TDM信号以传输到 一个基站。 第一TDM信号的分量根据信道分配信号分别路由并馈送到根据信道分配信号周期性地激活的期望的调制器，以在分配的信道上向移动单元发送信号。 来自移动单元的信号由基站处的解调器接收并组合成传输到MTSO的第二TDM信号。 第二TDM信号的分量根据信道分配信号被路由到适当的语音解码器/数据扩展器单元，用于转换到原始高比特率信号以传输到网络。