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51. 发明授权

US08098772B2 Method for digital wireless communications 有权
标题翻译：数字无线通信方法
公开(公告)号：US08098772B2
公开(公告)日：2012-01-17
申请号：US12971564
申请日：2010-12-17
申请人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/00 , H04L27/22 , H04L7/04
CPC分类号： H04L7/04 , H04L7/06 , H04L27/0008 , H04L27/206 , H04L27/34 , H04L27/3405 , H04L27/3455 , H04L2027/0024 , H04L2027/0087 , H04L2027/0093
摘要： In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.
摘要翻译：在每3个或更多符号插入一个导频符号的多值调制类型中，使用与导频符号不同的调制类型来调制紧接在导频符号之前和之后的每个符号的信号点。以这种方式，可以抑制通过导频符号估计基准相位和频率偏移量的精度的劣化，并且通过符号同步为符号的符号来改善准相干检测中的信噪比中的误码率特性不完全成立

52. 发明申请

US20100172444A1 METHOD FOR DIGITAL WIRELESS COMMUNICATIONS 有权
标题翻译：数字无线通信方法
公开(公告)号：US20100172444A1
公开(公告)日：2010-07-08
申请号：US12724098
申请日：2010-03-15
申请人： Yutaka MURAKAMI , Shinichiro TAKABAYASHI , Masayuki ORIHASHI , Akihiko MATSUOKA
发明人： Yutaka MURAKAMI , Shinichiro TAKABAYASHI , Masayuki ORIHASHI , Akihiko MATSUOKA
IPC分类号： H04L27/06
CPC分类号： H04L7/04 , H04L7/06 , H04L27/0008 , H04L27/206 , H04L27/34 , H04L27/3405 , H04L27/3455 , H04L2027/0024 , H04L2027/0087 , H04L2027/0093
摘要： In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.
摘要翻译：在每3个或更多符号插入一个导频符号的多值调制类型中，使用与导频符号不同的调制类型来调制紧接在导频符号之前和之后的每个符号的信号点。以这种方式，可以抑制通过导频符号估计基准相位和频率偏移量的精度的劣化，并且通过符号同步为符号的符号来改善准相干检测中的信噪比中的误码率特性不完全成立

53. 发明授权

US07738590B2 Radio communication apparatus capable of switching modulation schemes 有权
标题翻译：能够切换调制方式的无线通信装置
公开(公告)号：US07738590B2
公开(公告)日：2010-06-15
申请号：US11336956
申请日：2006-01-23
申请人： Yutaka Murakami , Shinichiro Takabayashi , Katsuaki Abe , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Shinichiro Takabayashi , Katsuaki Abe , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L25/49 , H04L27/36 , H04L27/20
CPC分类号： H04L27/3405 , H03F1/02 , H03F3/24 , H04B1/0475 , H04B2001/0416 , H04B2001/045 , H04L1/0003 , H04L27/2082 , H04L27/2601 , H04L27/34 , H04L27/3494 , H04L2203/00
摘要： A radio communication apparatus capable of switching modulation schemes includes a QPSK modulation signal generator configured to modulate transmission data by a QPSK modulation scheme and to output a QPSK modulation signal. A 64QAM modulation signal generator is configured to modulate transmission data by a 64QAM scheme and to output a 64QAM modulation signal. A radio processor is configured to receive, as an input, the QPSK modulation signal or the 64 QAM modulation signal and to output a transmission signal. A transmission power amplifier is configured to amplify a power of the transmission signal. The QPSK modulation signal generator and the 64QAM modulation signal generator perform gain control so as to make an average transmission power of the 64QAM modulation signal smaller than an average transmission power of the QPSK modulation signal.
摘要翻译：能够切换调制方式的无线通信装置包括：QPSK调制信号发生器，被配置为通过QPSK调制方式调制发送数据并输出QPSK调制信号。 64QAM调制信号发生器被配置为通过64QAM方式调制发送数据并输出64QAM调制信号。无线电处理器被配置为接收QPSK调制信号或64QAM调制信号作为输入，并输出发送信号。发送功率放大器被配置为放大发送信号的功率。 QPSK调制信号发生器和64QAM调制信号发生器执行增益控制，使得64QAM调制信号的平均发送功率小于QPSK调制信号的平均发送功率。

54. 发明授权

US07359457B2 Transmission apparatus, reception apparatus and digital radio communication method 有权
标题翻译：发送装置，接收装置和数字无线通信方式
公开(公告)号：US07359457B2
公开(公告)日：2008-04-15
申请号：US10827445
申请日：2004-04-20
申请人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/20 , H04L27/18 , H04L23/02 , H04L27/36
CPC分类号： H04L27/12 , H04B1/38 , H04L1/0003 , H04L1/0006 , H04L27/206 , H04L27/34 , H04L27/3455
摘要： A transmission apparatus includes a frame configuration determiner that determines a modulation system from among a plurality of modulation systems on a communication situation. A first symbol generator modulates a digital transmission signal according to the modulation system determined by the frame configuration determiner and generates a first symbol, the first symbol comprising a first quadrature baseband signal. A second symbol generator modulates the digital transmission signal according to a predetermined modulation system and generates a second symbol, the second symbol comprising a second quadrature baseband signal.
摘要翻译：发送装置包括帧配置确定器，该帧配置确定器根据通信情况从多个调制系统中确定调制系统。第一符号发生器根据由帧配置确定器确定的调制方式来调制数字传输信号，并产生第一符号，第一符号包括第一正交基带信号。第二符号发生器根据预定的调制系统调制数字传输信号，并产生第二符号，第二符号包括第二正交基带信号。

55. 发明授权

US07248643B2 Distortion compensator 失效
标题翻译：失真补偿器
公开(公告)号：US07248643B2
公开(公告)日：2007-07-24
申请号：US10502512
申请日：2003-06-04
申请人： Shinichiro Takabayashi , Masato Ukena , Masayuki Orihashi
发明人： Shinichiro Takabayashi , Masato Ukena , Masayuki Orihashi
IPC分类号： H04K1/02 , H04B1/04 , H04B3/46 , H04L27/00 , H03H7/30
CPC分类号： H03F1/3282 , H03F1/3247 , H03F1/3294
摘要： A coefficient computing section, for computing a characteristic reverse to an input/output characteristic of the power amplifier, is configured by a fixed coefficient storing section and an error coefficient computing section. The fixed coefficient storing section is previously stored with the characteristic reverse to a pre-measured input/output characteristic. The error coefficient computing section computes an error coefficient between a characteristic stored in the fixed coefficient storing section and a current characteristic of the power amplifier. When the determining section determines that the adjacent-channel leak current power ratio is greater than a predetermined value, an operation halt is instructed to the power amplifier.
摘要翻译：用于计算与功率放大器的输入/输出特性相反的特性的系数计算部分由固定系数存储部分和误差系数计算部分构成。固定系数存储部分预先存储有与预测输入/输出特性相反的特性。误差系数计算部分计算存储在固定系数存储部分中的特性与功率放大器的电流特性之间的误差系数。当确定部确定相邻信道泄漏电流功率比大于预定值时，向功率放大器指示操作停止。

56. 发明授权

US07123659B2 Digital reception apparatus for removing distortion from received signals 有权
标题翻译：用于从接收信号中去除失真的数字接收装置
公开(公告)号：US07123659B2
公开(公告)日：2006-10-17
申请号：US09813856
申请日：2001-03-22
申请人： Masayuki Orihashi , Katsuaki Abe , Job Cleopa Msuya , Shinichiro Takabayashi
发明人： Masayuki Orihashi , Katsuaki Abe , Job Cleopa Msuya , Shinichiro Takabayashi
IPC分类号： H04B14/04
CPC分类号： H03D3/006 , H04L27/2647
摘要： A digital reception apparatus includes a receiver that processes a received signal and a distortion corrector that corrects a non-linear distortion of the processed received signal, introduced by the receiver. The receiver may include an amplifier, a quadrature demodulator and/or a quantizer. The distortion corrector includes a distortion estimator that estimates the distortion and outputs a correcting signal based on an inverse distortion characteristic of the receiver, and a distortion compensator that multiplies the received signal and the correcting signal to remove the non-linear distortion from the received signal, to obtain a corrected received signal. The corrected signal is output to a demodulator, which performs demodulation processing on the corrected signal, and thereby obtains a demodulated signal.
摘要翻译：数字接收装置包括处理接收信号的接收机和校正由接收机引入的经处理的接收信号的非线性失真的失真校正器。接收机可以包括放大器，正交解调器和/或量化器。失真校正器包括估计失真的失真估计器，并且基于接收机的逆失真特性输出校正信号;以及失真补偿器，其将接收信号和校正信号相乘以从接收信号中去除非线性失真，以获得校正的接收信号。校正后的信号被输出到对校正信号进行解调处理的解调器，从而得到解调信号。

57. 发明授权

US06993092B1 Transmission apparatus, reception apparatus and digital radio communication method 有权
标题翻译：发送装置，接收装置和数字无线通信方式
公开(公告)号：US06993092B1
公开(公告)日：2006-01-31
申请号：US09627070
申请日：2000-07-27
申请人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/36 , H04L23/02
CPC分类号： H04L27/12 , H04B1/38 , H04L1/0003 , H04L1/0006 , H04L27/206 , H04L27/34 , H04L27/3455
摘要： Frame configuration determination section 101 judges a communication situation based on the transmission path information indicating the level of fluctuations of the transmission path due to fading and data transmission speed information indicating the transmission speed of the transmission data based on the level of the reception signal and determines the interval of inserting a known pilot symbol and the modulation system of a transmission digital signal. Quadrature baseband modulation section 102 modulates the transmission digital signal to a quadrature baseband signal according to the modulation system indicated from frame configuration determination section 101. Pilot symbol generation section 103 generates a pilot symbol known between the transmitting and receiving sides. Frame configuration section 104 inserts the known pilot symbol output from pilot symbol generation section 103 at the insertion interval instructed from frame configuration determination section 101 to configure a frame. This makes it possible to flexibly improve the data transmission efficiency and the quality of data at the same time.
摘要翻译：帧配置确定部分101基于由于衰落导致的传输路径的波动级别的传输路径信息和基于接收信号的电平指示传输数据的传输速度的数据传输速度信息来判断通信状况，并且确定插入已知导频符号的间隔和传输数字信号的调制系统。正交基带调制部102根据从帧配置判定部101指示的调制方式将发送数字信号调制为正交基带信号。导频符号生成部103生成在发送侧和接收侧之间已知的导频符号。帧配置单元104将从导频符号生成单元103输出的已知导频码元从帧配置决定单元101指示的插入间隔插入以构成帧。这使得可以同时灵活地提高数据传输效率和数据质量。

58. 发明申请

US20050245211A1 Transmission device 有权
标题翻译：传输设备
公开(公告)号：US20050245211A1
公开(公告)日：2005-11-03
申请号：US10518185
申请日：2003-09-29
申请人： Akihiko Matsuoka , Shinichiro Takabayashi , Yutaka Murakami
发明人： Akihiko Matsuoka , Shinichiro Takabayashi , Yutaka Murakami
IPC分类号： H04L27/20 , H04B1/04 , H04L27/36
CPC分类号： H03F1/3247 , H03F2201/3233 , H04L27/368
摘要： A phase/amplitude control section controls the phase and amplitude of at least one of the signals: a distributed signal distributed by a modulation signal distributor and a reference signal based on an orthogonal base-band signal. A signal combiner combines a combinatory signal according to the distributed signal and the reference signal whose phase and amplitude have been controlled. A reference table updating section updates non-linear distortion compensating data according to the combinatory signal subjected to A/D conversion and the orthogonal base-band signal. With this configuration, since a known signal component is removed from the combinatory signal, the change amount of the signal input to the A/D converter of a feedback system circuit is reduced and the A/D converter of the feedback system circuit need not have a wide dynamic range performance.
摘要翻译：相位/幅度控制部分控制信号中的至少一个的相位和幅度：由调制信号分配器分配的分布式信号和基于正交基带信号的参考信号。信号组合器根据分布信号和相位和振幅被控制的参考信号组合组合信号。参考表更新部分根据经过A / D转换的组合信号和正交基带信号来更新非线性失真补偿数据。利用这种配置，由于从组合信号中去除已知的信号分量，所以减少了输入到反馈系统电路的A / D转换器的信号的变化量，并且反馈系统电路的A / D转换器不需要动态范围广泛的表现。

59. 发明授权

US06748023B2 Apparatus and method for digital wireless communications 有权
公开(公告)号：US06748023B2
公开(公告)日：2004-06-08
申请号：US10427992
申请日：2003-05-02
申请人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Shinichiro Takabayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L2736
CPC分类号： H04L7/04 , H04L7/06 , H04L27/0008 , H04L27/206 , H04L27/34 , H04L27/3405 , H04L27/3455 , H04L2027/0024 , H04L2027/0087 , H04L2027/0093
摘要： In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.

60. 发明授权

US08498327B2 Wireless communication apparatus 有权
标题翻译：无线通信装置
公开(公告)号：US08498327B2
公开(公告)日：2013-07-30
申请号：US13459884
申请日：2012-04-30
申请人： Yasuaki Yuda , Takaaki Kishigami , Takashi Fukagawa , Yoichi Nakagawa , Shinichiro Takabayashi
发明人： Yasuaki Yuda , Takaaki Kishigami , Takashi Fukagawa , Yoichi Nakagawa , Shinichiro Takabayashi
IPC分类号： H04B1/38
CPC分类号： H04B7/0619 , H04B7/0617 , H04B7/086 , H04B17/11 , H04B17/21
摘要： Wireless communication apparatus adopting a time division duplex system for transmission and reception using plural antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means detects channel information based on reception output of N reception circuits having a one-to-one correspondence with N antennas. Correction value detection means finds a correction value for correcting deviation occurring between each of N transmission circuits and each of the N reception circuits based on the channel information. A wireless communication apparatus transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means of the wireless communication apparatus detects the correction value using the correction signal.
摘要翻译：采用使用多个天线进行发送和接收的时分双工系统的无线通信装置，使用通信信号检测和校正发送和接收电路之间发生的幅度和相位的偏差。信道估计装置根据与N个天线一一对应的N个接收电路的接收输出来检测信道信息。校正值检测装置根据频道信息找到校正发生在N个发送电路和N个接收电路中的每一个之间的偏差的校正值。无线通信装置向无线通信装置进行通信的基站发送已知的信号（训练信号）。基站根据已知的信号进行信道估计，生成并发送校正信号（探测信号）。无线通信装置的校正值检测装置使用校正信号来检测校正值。

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