专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明授权

US07069489B2 Transmission apparatus, reception apparatus, transmission method, and reception method 有权
标题翻译：发送装置，接收装置，发送方法和接收方法
公开(公告)号：US07069489B2
公开(公告)日：2006-06-27
申请号：US10466103
申请日：2002-11-15
申请人： Yutaka Murakami , Katsuaki Abe , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Katsuaki Abe , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： G06F11/00 , H04B14/01
CPC分类号： H04L1/0041 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0039 , H04L1/0058 , H04L1/0079 , H04L1/0083 , H04L1/08 , H04L27/0008 , H04L27/0012 , H04L27/20 , H04L27/2608 , Y02D50/10
摘要： In a communication system in which propagation path error tolerance is improved by switching the modulation method or error correction method adaptively according to the state of the propagation path, signals MX, MY, CX, and CY indicating the modulation method and error correction method used by the transmitting side are transmitted arranged at discrete locations within the same frame. By this means, the possibility of discretely arranged signals MX and MY, or CX and CY, both degrading is made low even if the transmit signal experiences fading or propagation path fluctuations. As a result, it is possible for the modulation method information signal and/or error correction method information signal to be restored correctly on the receiving side.
摘要翻译：在通过根据传播路径的状态自适应地切换调制方法或纠错方法来提高传播路径误差容忍的通信系统中，指示调制方式和误差校正方法的信号MX，MY，CX和CY表示由发送侧被发送布置在同一帧内的离散位置处。通过这种方式，即使发射信号经历衰落或传播路径波动，也会使离散布置的信号MX和MY，或CX和CY都降级的可能性变低。结果，可以在接收侧正确地恢复调制方法信息信号和/或纠错方法信息信号。

62. 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。

63. 发明申请

US20050249180A1 Communication method, transmitting device using the same, and receiving device using the same 有权
标题翻译：通信方法，使用其的发送装置，以及使用其的接收装置
公开(公告)号：US20050249180A1
公开(公告)日：2005-11-10
申请号：US10516937
申请日：2003-07-16
申请人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Yoichi Nakagawa
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Yoichi Nakagawa
IPC分类号： H04J99/00 , H04B7/04 , H04B7/06 , H04B7/08 , H04L5/02 , H04L25/02 , H04L27/26 , H04J1/00 , H04J3/00
CPC分类号： H04L5/0048 , H04B7/0413 , H04B7/0417 , H04B7/0613 , H04B7/0837 , H04J11/00 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04L27/2647 , H04L27/2657 , H04L27/2662 , H04W72/0453
摘要： A serial/parallel conversion section 202 converts a channel A transmit digital signal 201 to parallel data with an arrangement in accordance with a frame configuration signal 222. An inverse discrete Fourier transform section 204 performs inverse discrete Fourier transform processing of channel A parallel signal 203. A radio section 206 converts signal 205 to radio frequency. A power amplification section 208 amplifies the power of the transmit signal 207. A serial/parallel conversion section 212 converts a channel B transmit digital signal 211 to parallel data with an arrangement in accordance with frame configuration signal 222. An inverse discrete Fourier transform section 214 performs inverse discrete Fourier transform processing of parallel signal 213. A radio section 216 converts the post-transform signal 215 to radio frequency. A power amplification section 218 amplifies the power of the transmit signal 217.
摘要翻译：串行/并行转换部分202根据帧配置信号222将信道A发射数字信号201转换为并行数据。逆离散傅里叶变换部分204执行信道A并行信号203的离散傅里叶逆变换处理。无线电部分206将信号205转换成射频。功率放大部分208放大发射信号207的功率。串行/并行转换部分212根据帧配置信号222将信道B发射数字信号211转换为并行数据。离散傅里叶逆变换部分214 执行并行信号213的逆离散傅立叶变换处理。无线部分216将后变换信号215转换成射频。功率放大部分218放大发射信号217的功率。

64. 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。

65. 发明授权

US06608843B1 Pilot signal transmission technique and digital communication system using same 有权
标题翻译：导频信号传输技术和数字通信系统使用相同
公开(公告)号：US06608843B1
公开(公告)日：2003-08-19
申请号：US09292398
申请日：1999-04-15
申请人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Morikazu Sagawa
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka , Morikazu Sagawa
IPC分类号： H04B310
CPC分类号： H04L27/3455
摘要： In a digital communication system such as a mobile radio system, fading distortion is compensated with a raised precision. In a transmitter, pilot signals are regularly inserted in the information signals. The amplitude of the pilot signals are set larger than the maximum possible amplitude of the information signals. The modulation scheme of the pilot signals may be different from that of the information signals. In a receiver, the fading distortion of each of the pilot signals is determined. The fading distortions of the information signals are estimated by interpolation using the determined fading distortion of the pilot signal, and then compensated. The frequency band of each information signal is preferably limited with a roll-off filter with a roll-off coefficient ranging from 0.1 to 0.4.
摘要翻译：在诸如移动无线电系统的数字通信系统中，以提高的精度补偿衰落失真。在发射机中，导频信号被定期插入信息信号中。导频信号的幅度被设定为大于信息信号的最大可能幅度。导频信号的调制方式可能与信息信号的调制方式不同。在接收机中，确定每个导频信号的衰落失真。通过使用确定的导频信号的衰落失真的内插来估计信息信号的衰落失真，然后进行补偿。每个信息信号的频带优选地通过具有从0.1到0.4的滚降系数的滚降滤波器来限制。

66. 发明授权

US08724729B2 Interleaver, interleaving method, transmission apparatus, and transmitting method 有权
标题翻译：交织器，交织方法，发送装置和发送方法
公开(公告)号：US08724729B2
公开(公告)日：2014-05-13
申请号：US13399848
申请日：2012-02-17
申请人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka , Daichi Imamura , Rahul Malik
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka , Daichi Imamura , Rahul Malik
IPC分类号： H04B7/02
CPC分类号： H04B7/0413 , H04B7/0851 , H04L1/0057 , H04L1/0071 , H04L1/0086 , H04L1/0618 , H04L1/1819 , H04L5/0023 , H04L25/03229 , H04L25/03305 , H04L25/03324 , H04L25/03891 , H04L27/2628 , H04L27/265 , H04L2025/03414 , H04L2025/03611
摘要： Soft decision sections provisionally decide each modulated signal separated using an inverse matrix calculation of a channel fluctuation matrix at separation section. Signal point reduction sections reduce candidate signal points of a multiplexed modulated signal using the provisional decision results. Soft decision sections make a correct decision using the reduced candidate signal points and obtain received data of each modulated signal. This allows received data RA, RB with a good error rate characteristic to be obtained with a relatively small number of calculations without reducing data transmission efficiency.
摘要翻译：软判决部分使用在分离部分的信道波动矩阵的逆矩阵计算来临时决定分离的每个调制信号。信号点减少部分使用临时判定结果来减少复用调制信号的候选信号点。软判决部分使用缩减的候选信号点做出正确的决定，并获得每个调制信号的接收数据。这允许以相对较少数量的计算获得具有良好错误率特性的接收数据RA，RB，而不降低数据传输效率。

67. 发明授权

US08527827B2 Transmitting apparatus, receiving apparatus, transmission method, and reception method 有权
标题翻译：发送装置，接收装置，发送方法和接收方法
公开(公告)号：US08527827B2
公开(公告)日：2013-09-03
申请号：US11940381
申请日：2007-11-15
申请人： Yutaka Murakami , Katsuaki Abe , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Katsuaki Abe , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： G06F11/00
CPC分类号： H04L1/0041 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0039 , H04L1/0058 , H04L1/0079 , H04L1/0083 , H04L1/08 , H04L27/0008 , H04L27/0012 , H04L27/20 , H04L27/2608 , Y02D50/10
摘要： An orthogonal frequency division multiplexing transmission method includes generating a data symbol. A control information signal is generated. The control information signal relates to a modulation scheme and an error correction scheme of a data symbol in a frame. An orthogonal frequency division multiplexing signal is formed. The orthogonal frequency division multiplexing signal includes the data symbol and the control information signal. The orthogonal frequency division multiplexing signal is formed by arranging the control information signal in a first symbol group that is formed with subcarriers in a time period, and in a second symbol group that is formed with subcarriers, located in the time period, and that has a frequency band distant from the first symbol group.
摘要翻译：正交频分复用传输方法包括产生数据符号。生成控制信息信号。控制信息信号涉及帧中数据符号的调制方案和纠错方案。形成正交频分复用信号。正交频分复用信号包括数据符号和控制信息信号。正交频分多路复用信号是通过将控制信息信号排列成在时间段内形成有子载波的第一符号组和在时间段内形成有子载波的第二符号组中形成的，并且具有远离第一符号组的频带。

68. 发明授权

US08520769B2 Transmission method, transmission apparatus, reception method, and reception apparatus 有权
标题翻译：发送方法，发送装置，接收方法和接收装置
公开(公告)号：US08520769B2
公开(公告)日：2013-08-27
申请号：US13590779
申请日：2012-08-21
申请人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04L27/00
CPC分类号： H04B7/0413 , H04B7/0608 , H04B7/0613 , H04B7/0689 , H04B7/0697 , H04L1/06
摘要： Of any one of transmission method X of transmitting modulated signal A and modulated signal B including the same data from a plurality of antennas and transmission method Y of transmitting modulated signal A and modulated signal B having different data from the plurality of antennas, base station apparatus 201 does not change the transmission method during data transmission and changes only the modulation scheme. Base station apparatus 201 transmits modulated signal A and modulated signal B to communication terminal apparatus 251 using the determined transmission method and modulation scheme. In this way, it is possible to improve data transmission efficiency when transmitting data using the plurality of antennas.
摘要翻译：发送调制信号A的发送方法X和包含来自多个天线的相同数据的调制信号B和从多个天线发送调制信号A和调制信号B的数据不同的发送方式Y中的任一种，基站装置 201在数据传输期间不改变传输方法，并且仅改变调制方案。基站装置201使用确定的发送方法和调制方式向调制信号A和调制信号B发送到通信终端装置251。以这种方式，可以在使用多个天线发送数据时提高数据传输效率。

69. 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.

70. 发明授权

US08446973B2 Transmission and reception apparatus and method 有权
公开(公告)号：US08446973B2
公开(公告)日：2013-05-21
申请号：US13494917
申请日：2012-06-12
申请人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka
发明人： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka
IPC分类号： H04K1/10
CPC分类号： H04L25/0204 , H04B7/0413 , H04B7/06 , H04B7/0626 , H04B7/0632 , H04B7/0671 , H04B7/0689 , H04B7/0697 , H04B7/082 , H04L1/0618 , H04L5/0023 , H04L5/003 , H04L5/0048 , H04L25/0206 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/2627 , H04L27/2649 , H04L27/2657 , H04L27/2659 , H04L27/2691 , H04L27/2695 , H04L69/22 , H04W52/52 , H04W72/0453
摘要： A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式