公开(公告)号：US5363411A

公开(公告)日：1994-11-08

申请号：US902383

申请日：1992-06-23

申请人： Yukitsuna Furuya ,  Kazuhiro Okanoue ,  Akihisa Ushirokawa ,  Hideho Tomita

发明人： Yukitsuna Furuya ,  Kazuhiro Okanoue ,  Akihisa Ushirokawa ,  Hideho Tomita

IPC分类号： H04B3/06 ,  H04B1/16 ,  H04B7/005 ,  H04L25/03 ,  H04L27/00 ,  H04L27/01 ,  H03H7/30 ,  H03H7/40 ,  H03K5/159 ,  H03G11/04

CPC分类号： H04W52/0245 ,  H04L25/03012 ,  Y02B60/50

摘要： A receiver for digital radio communications has an equalizer which is powered off for reduced power consumption when received radio waves undergo relatively small intersymbol interference. When intersymbol interference is significantly large, the equalizer is powered on to remove the intersymbol interference for better signal reception. The receiver has a signal quality decision circuit which powers on the equalizer when the quality of the received signal is poor, and powers off the equalizer when the quality of the received signal is good. The receiver consumes a relatively small amount of electric power overall.

摘要翻译： 用于数字无线电通信的接收机具有均衡器，其在接收的无线电波经历相对较小的码间干扰时被断电以降低功率消耗。 当符号间干扰明显较大时，均衡器通电就可以消除符号间干扰，从而更好地接收信号。 接收机具有信号质量判定电路，当接收信号的质量差时，对均衡器供电，并且当接收信号的质量良好时关闭均衡器。 接收器总体消耗相对较小的电力。

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：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：US08335153B2

公开(公告)日：2012-12-18

申请号：US12913266

申请日：2010-10-27

申请人： Masaki Ichihara ,  Yukitsuna Furuya

发明人： Masaki Ichihara ,  Yukitsuna Furuya

IPC分类号： H04J11/00

CPC分类号： H04L5/0046 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/06 ,  H04L27/183 ,  H04L27/2604 ,  H04L27/3488

摘要： To provide an orthogonal frequency division multiplex modem circuit which can multiplex signals, whose bit rates and QoS are different from one another, and can transmit the signals via one OFDM line. A serial/parallel converter converts input signals into a complex parallel signal respectively, and a sub carrier and a modulation system are assigned every communication channel. A randomizer changes the alignment sequence of the signal, a discrete inverse Fourier transformer processes the signal, a parallel/serial converter converts the signal into a serial signal, and a transmitter performs the orthogonal modulation of the signal to output the signal from an antenna. A receiver performs orthogonal demodulation of the signal received with an antenna, a serial/parallel converter converts the signal into a parallel signal, and a discrete Fourier transformer processes the parallel signal. In addition, a de-randomizer restores the alignment sequence of the subcarriers into the original condition, and a parallel/serial converter decodes and outputs the signal.

摘要翻译： 提供一种正交频分复用调制解调器电路，其可以将其比特率和QoS彼此不同的信号进行复用，并且可以经由一条OFDM线路发送信号。 串行/并行转换器将输入信号分别转换成复并行信号，每个通信信道分配一个子载波和一个调制系统。 随机化器改变信号的对准顺序，离散傅里叶逆变换器处理信号，并行/串行转换器将信号转换成串行信号，并且发射机执行信号的正交调制以从天线输出信号。 接收机对由天线接收的信号执行正交解调，串/并转换器将信号转换为并行信号，离散付里叶变换器处理并行信号。 此外，去随机器将子载波的对准序列恢复到原始状态，并行/串行转换器解码并输出信号。

公开(公告)号：US20080008229A1

公开(公告)日：2008-01-10

申请号：US11766303

申请日：2007-06-21

申请人： Kojiro Hamabe ,  Yukitsuna Furuya

发明人： Kojiro Hamabe ,  Yukitsuna Furuya

IPC分类号： H04B7/26

CPC分类号： H04B7/2621 ,  H04W72/082

摘要： A cellular system according to an exemplary aspect of the present invention is a cellular system in which a plurality of frequency carriers are available for communication between a base station and a mobile station, including: a first measurement unit for measuring a rate of time that interference power of a frequency carrier in uplink is more than a pre-determined threshold; a carrier availability/unavailability determining unit for putting the frequency carrier into an unavailable state if the time rate is more than a first threshold and putting the frequency carrier into an available state if the time rate is less than a second threshold; and a communication unit for using the frequency carrier in an available state for the communication between the base station and the mobile station.

摘要翻译： 根据本发明的示例性方面的蜂窝系统是其中多个频率载波可用于基站和移动站之间的通信的蜂窝系统，包括：第一测量单元，用于测量所述干扰的时间速率 上行链路中频率载波的功率大于预定阈值; 载波可用性/不可用性确定单元，用于如果所述时间速率大于第一阈值，则将所述频率载波置于不可用状态，并且如果所述时间速率小于第二阈值，则将所述频率载波置于可用状态; 以及通信单元，用于在可用状态下使用该频率载波进行基站与移动台之间的通信。

公开(公告)号：US07099268B2

公开(公告)日：2006-08-29

申请号：US09879323

申请日：2001-06-12

申请人： Masaki Ichihara ,  Yukitsuna Furuya

发明人： Masaki Ichihara ,  Yukitsuna Furuya

IPC分类号： H04J11/00

CPC分类号： H04L5/0046 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/06 ,  H04L27/183 ,  H04L27/2604 ,  H04L27/3488

摘要： To provide an orthogonal frequency division multiplex modem circuit which can multiplex signals, whose bit rates and QoS are different from one another, and can transmit the signals via one OFDM line. A serial/parallel converter converts input signals into a complex parallel signal respectively, and a sub carrier and a modulation system are assigned every communication channel. A randomizer changes the alignment sequence of the signal, a discrete inverse Fourier transformer processes the signal, a parallel/serial converter converts the signal into a serial signal, and a transmitter performs the orthogonal modulation of the signal to output the signal from an antenna. A receiver performs orthogonal demodulation of the signal received with an antenna, a serial/parallel converter converts the signal into a parallel signal, and a discrete Fourier transformer processes the parallel signal. In addition, a de-randomizer restores the alignment sequence of the subcarriers into the original condition, and a parallel/serial converter decodes and outputs the signal.

摘要翻译： 提供一种正交频分复用调制解调器电路，其可以将其比特率和QoS彼此不同的信号进行复用，并且可以经由一条OFDM线路发送信号。 串行/并行转换器将输入信号分别转换成复并行信号，每个通信信道分配一个子载波和一个调制系统。 随机化器改变信号的对准顺序，离散傅里叶逆变换器处理信号，并行/串行转换器将信号转换成串行信号，并且发射机执行信号的正交调制以从天线输出信号。 接收机对由天线接收的信号执行正交解调，串/并转换器将信号转换为并行信号，离散付里叶变换器处理并行信号。 此外，去随机器将子载波的对准序列恢复到原始状态，并行/串行转换器解码并输出信号。

公开(公告)号：US5748668A

公开(公告)日：1998-05-05

申请号：US798874

申请日：1997-02-11

申请人： Hideho Tomita ,  Masahiro Ooki ,  Yukitsuna Furuya

发明人： Hideho Tomita ,  Masahiro Ooki ,  Yukitsuna Furuya

IPC分类号： H04B1/707 ,  H04B7/26 ,  H04W84/12 ,  H04W88/02 ,  H04K1/00

CPC分类号： H04B1/707 ,  H04B7/2625

摘要： In a spread spectrum device including a serial to parallel converter (14) for converting a serial information signal (10) into a parallel signal of n bits, where n represents an integer not smaller than two, an information modulator (20) carries out information modulation on m bits among the n bits of the parallel signal and produces a modulated information signal, where m represents a positive integer smaller than n. A selective spreading code producing circuit (21, 22) has spectrum spreading codes which are equal in number to 2.sup.(n-m) and are different from one another. The selective spreading code producing circuit selectively produces, as a selected spreading code, one of the spectrum spreading codes that is specified by remaining (n-m) bits among the n bits of the parallel signal. A spectrum spreading circuit (23) carries out spectrum spreading on the modulated information signal on the basis of the selected spreading code and produces a spectrum spread signal (13). The spectrum spread signal may be transmitted by a radio portion (18) as a radio information signal (11).

摘要翻译： 在包括用于将串行信息信号（10）转换为n位并行信号的串行到并行转换器（14）的扩展频谱装置中，其中n表示不小于2的整数，信息调制器（20）执行信息 对并行信号的n位中的m位进行调制，并产生调制信息信号，其中m表示小于n的正整数。 选择性扩展码产生电路（21,22）具有数量相等于2（n-m）且彼此不同的频谱扩展码。 选择性扩展码产生电路选择性地产生由并行信号的n位中的剩余（n-m）位指定的频谱扩展码之一作为所选择的扩展码。 频谱扩展电路（23）根据所选择的扩展码对调制信息信号进行频谱扩展，并产生频谱扩展信号（13）。 频谱扩展信号可以由无线电部分（18）作为无线信息信号（11）发送。

公开(公告)号：US5625639A

公开(公告)日：1997-04-29

申请号：US325701

申请日：1994-10-19

申请人： Hideho Tomita ,  Masahiro Ooki ,  Yukitsuna Furuya

发明人： Hideho Tomita ,  Masahiro Ooki ,  Yukitsuna Furuya

IPC分类号： H04B1/707 ,  H04B7/26 ,  H04W84/12 ,  H04W88/02 ,  H04H1/00

CPC分类号： H04B1/707 ,  H04B7/2625

摘要： In a spread spectrum device including a serial to parallel converter (14) for converting a serial information signal (10) into a parallel signal of n bits, where n represents an integer not smaller than two, an information modulator (20) carries out information modulation on m bits among the n bits of the parallel signal and produces a modulated information signal, where m represents a positive integer smaller than n. A selective spreading code producing circuit (21, 22) has spectrum spreading codes which are equal in number to 2.sup.(n-m) and are different from one another. The selective spreading code producing circuit selectively produces, as a selected spreading code, one of the spectrum spreading codes that is specified by remaining (n-m) bits among the n bits of the parallel signal. A spectrum spreading circuit (23) carries out spectrum spreading on the modulated information signal on the basis of the selected spreading code and produces a spectrum spread signal (13). The spectrum spread signal may be transmitted by a radio portion (18) as a radio information signal (11).

摘要翻译： 在包括用于将串行信息信号（10）转换为n位并行信号的串行到并行转换器（14）的扩展频谱装置中，其中n表示不小于2的整数，信息调制器（20）执行信息 对并行信号的n位中的m位进行调制，并产生调制信息信号，其中m表示小于n的正整数。 选择性扩展码产生电路（21,22）具有数量相等于2（n-m）且彼此不同的频谱扩展码。 选择性扩展码产生电路选择性地产生由并行信号的n位中的剩余（n-m）位指定的频谱扩展码之一作为所选择的扩展码。 频谱扩展电路（23）根据所选择的扩展码对调制信息信号进行频谱扩展，并产生频谱扩展信号（13）。 频谱扩展信号可以由无线电部分（18）作为无线信息信号（11）发送。

公开(公告)号：US20060209673A1

公开(公告)日：2006-09-21

申请号：US11441257

申请日：2006-05-25

申请人： Masaki Ichihara ,  Yukitsuna Furuya

发明人： Masaki Ichihara ,  Yukitsuna Furuya

IPC分类号： H04J11/00

CPC分类号： H04L5/0046 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/06 ,  H04L27/183 ,  H04L27/2604 ,  H04L27/3488

摘要： To provide an orthogonal frequency division multiplex modem circuit which can multiplex signals, whose bit rates and QoS are different from one another, and can transmit the signals via one OFDM line. A serial/parallel converter converts input signals into a complex parallel signal respectively, and a sub carrier and a modulation system are assigned every communication channel. A randomizer changes the alignment sequence of the signal, a discrete inverse Fourier transformer processes the signal, a parallel/serial converter converts the signal into a serial signal, and a transmitter performs the orthogonal modulation of the signal to output the signal from an antenna. A receiver performs orthogonal demodulation of the signal received with an antenna, a serial/parallel converter converts the signal into a parallel signal, and a discrete Fourier transformer processes the parallel signal. In addition, a de-randomizer restores the alignment sequence of the subcarriers into the original condition, and a parallel/serial converter decodes and outputs the signal.

公开(公告)号：US20050050430A1

公开(公告)日：2005-03-03

申请号：US10924216

申请日：2004-08-24

申请人： Yukitsuna Furuya

发明人： Yukitsuna Furuya

IPC分类号： H04N7/14 ,  H04B1/707 ,  H04J13/00 ,  H04L1/00 ,  H04N19/00 ,  H04N19/33 ,  H04N19/65 ,  H04N19/70 ,  H04N19/89 ,  H04N19/96 ,  H04N21/438 ,  H03M13/00 ,  G01R31/28

CPC分类号： H04N7/17309 ,  H04N19/187 ,  H04N19/37 ,  H04N19/60 ,  H04N19/61 ,  H04N21/234327 ,  H04N21/2383 ,  H04N21/41407 ,  H04N21/4382 ,  H04N21/6131

摘要： A system is provided for efficiently utilizing a transmission capacity without complicated processing by using a hierarchical code comprised of a plurality of layers having different error correcting capabilities. In a transmitter, an encoding unit encodes an image in accordance with a hierarchical coding scheme to generate a plurality of layer data. An error correcting code addition unit performs error correction coding on each of at least one layer data including the lowermost layer data in accordance with an error correction coding scheme which gives higher error correcting capabilities to a lower layer than a higher layer. A transmission unit transmits each of the layer data and error correcting codes onto a transmission path. A receiver corrects possible errors introduced on the transmission path into the layer data received from the transmitter in accordance with the error correction coding scheme, and decodes layer data received in a quality available for decoding to restore the image.

摘要翻译： 提供了一种系统，用于通过使用由具有不同纠错能力的多个层组成的分层代码来有效利用传输容量而不需要复杂的处理。 在发射机中，编码单元根据分层编码方案对图像进行编码，以生成多个层数据。 纠错码相加单元根据向较低层提供较高纠错能力的纠错编码方案对包括最底层数据的至少一层数据进行纠错编码。 发送单元将每个层数据和纠错码发送到传输路径上。 接收机根据纠错编码方案将在传输路径上引入的可能的错误校正到从发射机接收的层数据中，并且以可用于解码的质量接收的层数据解码以恢复图像。