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1. 发明授权

US07953177B2 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：US07953177B2
公开(公告)日：2011-05-31
申请号：US12757509
申请日：2010-04-09
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 , H04L23/00
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 that is capable of switching modulation schemes. The radio communication apparatus includes a QPSK modulation signal generator, a QAM modulation signal generator, a transmission radio, and a common transmission power amplifier. The QPSK modulation signal generator modulates transmission data by a QPSK modulation scheme and outputs a QPSK modulation signal. The QAM modulation signal generator modulates transmission data by a QAM scheme and outputs a QAM modulation signal. The transmission radio receives the QPSK modulation signal or the QAM modulation signal and outputs a transmission signal, which is amplified by the common transmission power amplifier. The QPSK modulation signal generator and the QAM modulation signal generator each output signal component that make an average transmission power of the QAM modulation signal in the common transmission power amplifier smaller than an average transmission power of the QPSK modulation signal in the common transmission power amplifier.
摘要翻译：一种能够切换调制方案的无线通信装置。无线通信装置包括QPSK调制信号发生器，QAM调制信号发生器，发送无线电和公共发送功率放大器。 QPSK调制信号生成器通过QPSK调制方式来调制发送数据并输出QPSK调制信号。 QAM调制信号发生器通过QAM方式来调制发送数据并输出QAM调制信号。发送无线电接收QPSK调制信号或QAM调制信号，并输出由公共发送功率放大器放大的发送信号。 QPSK调制信号发生器和QAM调制信号发生器使公共发送功率放大器中的QAM调制信号的平均发送功率小于公共发送功率放大器中的QPSK调制信号的平均发送功率的各输出信号分量。

2. 发明授权

US06608868B1 Apparatus and method for digital wireless communications 有权
标题翻译：数字无线通信的装置和方法
公开(公告)号：US06608868B1
公开(公告)日：2003-08-19
申请号：US09482892
申请日：2000-01-14
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： H04L2302
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

3. 发明申请

US20120328047A1 TRANSMISSION DEVICE, RECEPTION DEVICE, AND RADIO COMMUNICATION METHOD 有权
标题翻译：传输设备，接收设备和无线电通信方法
公开(公告)号：US20120328047A1
公开(公告)日：2012-12-27
申请号：US13606327
申请日：2012-09-07
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： H04L27/04 , H04L27/06
CPC分类号： H04B1/711 , H04B1/707 , H04B1/7075 , H04B2201/70705 , H04B2201/70716 , H04B2201/70728 , H04J13/00 , H04L1/0003 , H04L1/0023 , H04L5/0007 , H04L5/0016 , H04L5/0044 , H04L5/0048 , H04L27/18 , H04L27/227 , H04L27/2602 , H04L27/2662 , H04L27/34 , H04L27/364 , H04L27/38 , H04L2027/004 , H04L2027/0061
摘要： A transmitting apparatus includes an OFDM modulator that generates a first modulation symbol by modulating a first information signal using a first modulation scheme, a signal point of the first modulated information signal being at a first position in an in-phase quadrature-phase plane. A second modulation symbol by modulating a second information signal using the first modulation scheme, and by changing a second position at which a signal point of the modulated second information signal is arranged to a third position in the in-phase quadrature-phase plane, and an OFDM modulation signal including the first modulation symbol and the second modulation symbol, wherein the OFDM modulation signal comprises a plurality of subcarriers.
摘要翻译：发送装置包括OFDM调制器，其通过使用第一调制方式调制第一信息信号来生成第一调制符号，第一调制信息信号的信号点处于同相正交相位平面中的第一位置。第二调制符号，通过使用第一调制方案调制第二信息信号，并且通过改变调制的第二信息信号的信号点被布置在同相正交相位平面中的第三位置的第二位置，以及包括第一调制符号和第二调制符号的OFDM调制信号，其中OFDM调制信号包括多个子载波。

4. 发明授权

US07724638B2 Transmission device, reception device and radio communication method 有权
标题翻译：传输设备，接收设备和无线电通信方式
公开(公告)号：US07724638B2
公开(公告)日：2010-05-25
申请号：US10485115
申请日：2002-07-23
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： H04J11/00
CPC分类号： H04B1/711 , H04B1/707 , H04B1/7075 , H04B2201/70705 , H04B2201/70716 , H04B2201/70728 , H04J13/00 , H04L1/0003 , H04L1/0023 , H04L5/0007 , H04L5/0016 , H04L5/0044 , H04L5/0048 , H04L27/18 , H04L27/227 , H04L27/2602 , H04L27/2662 , H04L27/34 , H04L27/364 , H04L27/38 , H04L2027/004 , H04L2027/0061
摘要： On a transmitting side, a spread modulated signal that has undergone spread spectrum processing and an information modulated signal that has not undergone spread spectrum processing are multiplexed in a same frequency band. On the receiving side, the specific modulated signal is first demodulated by a spread spectrum demodulation section, then a replica signal of the specific modulated signal is generated by a spread spectrum modulated signal regeneration section, and the information signal that has not undergone spread spectrum processing is extracted by eliminating the replica signal from the multiplex signal. Thus, even when a large number of information signals are transmitted in a same frequency band, these signals can be separated and demodulated satisfactorily on the receiving side.
摘要翻译：在发送侧，经过扩展频谱处理的扩频调制信号和未进行扩展频谱处理的信息调制信号被复用在同一频带。在接收侧，通过扩频解调部首先对特定的调制信号进行解调，由扩频调制信号再生部生成特定调制信号的复制信号，没有进行扩频处理的信息信号通过从复用信号中消除复制信号来提取。因此，即使在相同频带中发送大量信息信号的情况下，也能够在接收侧令人满意地分离和解调这些信号。

5. 发明授权

US07664011B2 Wireless communications apparatus and wireless communication method 有权
标题翻译：无线通信装置和无线通信方法
公开(公告)号：US07664011B2
公开(公告)日：2010-02-16
申请号：US12175532
申请日：2008-07-18
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： H04J13/00
CPC分类号： H04L5/0058 , H04B1/692 , H04L1/0001 , H04L1/0003 , H04L5/0007 , H04L5/0021 , H04L5/006 , H04L5/0064 , H04L5/0075 , H04L5/0092 , H04L27/0008 , H04L27/2601 , H04W72/0453
摘要： The invention performs orthogonal frequency division multiplex processing on a transmission signal to form an OFDM modulation signal (daubed in FIG.) and performs orthogonal frequency division multiplex processing and code division multiple access processing on a transmission signal to form an OFDM-CDM modulation signal (shaded in FIG.) to transmit the OFDM modulation signal and the OFDM-CDM modulation signal, which makes it possible to transmit data in a very high rate using the OFDM modulation signal while making it possible to transmit data in a higher quality using the OFDM-CDM modulation signal than using the OFDM-modulation signal, although it is slightly inferior to OFDM modulation in terms of high rate transmission.
摘要翻译：本发明对传输信号进行正交频分复用处理以形成OFDM调制信号（在图中涂覆），并对传输信号执行正交频分复用处理和码分多址处理，以形成OFDM-CDM调制信号（发送OFDM调制信号和OFDM-CDM调制信号，这使得可以使用OFDM调制信号以非常高的速率发送数据，同时可以使用OFDM来传输更高质量的数据 -CDM调制信号比使用OFDM调制信号，尽管在高速率传输方面略逊于OFDM调制。

6. 发明授权

US07420915B2 Radio communications apparatus and radio communications method 有权
标题翻译：无线电通信装置和无线电通信方法
公开(公告)号：US07420915B2
公开(公告)日：2008-09-02
申请号：US10486916
申请日：2002-08-22
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： H04J11/00
CPC分类号： H04L5/0058 , H04B1/692 , H04L1/0001 , H04L1/0003 , H04L5/0007 , H04L5/0021 , H04L5/006 , H04L5/0064 , H04L5/0075 , H04L5/0092 , H04L27/0008 , H04L27/2601 , H04W72/0453
摘要： The invention performs orthogonal frequency division multiplex processing on a transmission signal to form an OFDM modulation signal (daubed in FIG.) and performs orthogonal frequency division multiplex processing and code division multiple access processing on a transmission signal to form an OFDM-CDM modulation signal (shaded in FIG.) to transmit the OFDM modulation signal and the OFDM-CDM modulation signal, which makes it possible to transmit data in a very high rate using the OFDM modulation signal while making it possible to transmit data in a higher quality using the OFDM-CDM modulation signal than using the OFDM—modulation signal, although it is slightly inferior to OFDM modulation in terms of high rate transmission.
摘要翻译：本发明对传输信号进行正交频分复用处理以形成OFDM调制信号（在图中涂覆），并对传输信号执行正交频分复用处理和码分多址处理，以形成OFDM-CDM调制信号（发送OFDM调制信号和OFDM-CDM调制信号，这使得可以使用OFDM调制信号以非常高的速率发送数据，同时使得可以使用OFDM来传输更高质量的数据 -CDM调制信号比使用OFDM调制信号，尽管在高速率传输方面略逊于OFDM调制。

7. 发明授权

US07359454B2 Apparatus and method for digital wireless communications 有权
标题翻译：数字无线通信的装置和方法
公开(公告)号：US07359454B2
公开(公告)日：2008-04-15
申请号：US10781839
申请日：2004-02-20
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： H04L27/26 , H04L23/02 , H04B7/216
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： A digital wireless communication apparatus includes a first modulator that modulates a pilot symbol according to a first modulation scheme, and a second modulator that modulates specific symbols according to a second modulation scheme, the second modulation scheme being different than the first modulation scheme. A third modulator modulates symbols other than the pilot symbol and the specific symbols according to a third modulation scheme, the third modulation scheme being different than the first and second modulation schemes. A timing controller controls timing such that the specific symbols are inserted immediately before and after the pilot symbol. The signal points of the specific symbols are allocated on an imaginary line that connects the origin point and a signal point of the pilot symbol on a signal space diagram.
摘要翻译：数字无线通信装置包括根据第一调制方案调制导频符号的第一调制器和根据第二调制方案调制特定符号的第二调制器，所述第二调制方案不同于第一调制方案。第三调制器根据第三调制方案调制除导频符号和特定符号之外的符号，第三调制方案不同于第一和第二调制方案。定时控制器控制定时，使得在导频符号之前和之后立即插入特定符号。特定符号的信号点分配在连接信号空间图上的导频符号的原点和信号点的假想线上。

8. 发明申请

US20060136975A1 Radio communication apparatus 有权
标题翻译：无线通信装置
公开(公告)号：US20060136975A1
公开(公告)日：2006-06-22
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： H04N7/173 , H04L27/18 , H03K9/10 , H04L27/10 , H03D3/00 , H04N7/18 , H04N7/20
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。

9. 发明授权

US06748026B1 Distortion estimation apparatus, frequency offset compensation apparatus and reception apparatus 失效
标题翻译：失真估计装置，频偏补偿装置和接收装置
公开(公告)号：US06748026B1
公开(公告)日：2004-06-08
申请号：US09499303
申请日：2000-02-07
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： H03K900
CPC分类号： H04L27/3809 , H04L27/3872
摘要： In-phase component approximation section 111 calculates an amplitude variation amount of an in-phase component of a data symbol from an amplitude variation amount of an in-phase component of a pilot symbol approximately. Quadrature component approximation section 112 calculates an amplitude variation amount of a quadrature component of the data symbol from an amplitude variation amount of a quadrature component of the pilot symbol approximately. Amplitude variation calculation section 113 calculates an amplitude variation amount of each data symbol from the amplitude variation amounts of the in-phase component and quadrature component of each data symbol. Phase variation calculation section 114 calculates a phase variation amount of the data symbol from a phase variation amount of the pilot symbol approximately. Thus, by calculating the amplitude variation amount of the data symbol and the phase variation amount of the data symbol separately, even in the case where a frequency offset between a transmitter and receiver is large, it is possible to estimate the frequency offset and fading distortion with high accuracy, and to suppress the deterioration of bit error rate characteristic.
摘要翻译：同相分量近似部分111从导频符号的同相分量的幅度变化量近似地计算数据符号的同相分量的振幅变化量。正交分量近似部分112从导频符号的正交分量的幅度变化量近似地计算数据符号的正交分量的振幅变化量。幅度变化计算部分113根据每个数据符号的同相分量和正交分量的振幅变化量来计算每个数据符号的振幅变化量。相位变动计算部分114从导频符号的相位变化量近似地计算数据符号的相位变化量。因此，通过分别计算数据符号的幅度变化量和数据符号的相位变化量，即使在发送器与接收器之间的频率偏移大的情况下，也可以估计频率偏移和衰落失真高精度，并且抑制误码率特性的恶化。

10. 发明授权

US08462615B2 Transmission device, reception device, and radio communication method 有权
公开(公告)号：US08462615B2
公开(公告)日：2013-06-11
申请号：US13606327
申请日：2012-09-07
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： H04J11/00
CPC分类号： H04B1/711 , H04B1/707 , H04B1/7075 , H04B2201/70705 , H04B2201/70716 , H04B2201/70728 , H04J13/00 , H04L1/0003 , H04L1/0023 , H04L5/0007 , H04L5/0016 , H04L5/0044 , H04L5/0048 , H04L27/18 , H04L27/227 , H04L27/2602 , H04L27/2662 , H04L27/34 , H04L27/364 , H04L27/38 , H04L2027/004 , H04L2027/0061
摘要： A transmitting apparatus includes an OFDM modulator that generates a first modulation symbol by modulating a first information signal using a first modulation scheme, a signal point of the first modulated information signal being at a first position in an in-phase quadrature-phase plane. A second modulation symbol by modulating a second information signal using the first modulation scheme, and by changing a second position at which a signal point of the modulated second information signal is arranged to a third position in the in-phase quadrature-phase plane, and an OFDM modulation signal including the first modulation symbol and the second modulation symbol, wherein the OFDM modulation signal comprises a plurality of subcarriers.

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