专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明授权

US07715504B2 Receiving apparatus and transmitting apparatus 有权
标题翻译：接收装置和发送装置
公开(公告)号：US07715504B2
公开(公告)日：2010-05-11
申请号：US10580398
申请日：2004-11-04
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： H04L27/06 , H03M13/03
CPC分类号： H04L1/06 , H04B7/0413 , H04B7/0854 , H04L1/0054 , H04L1/006 , H04L1/007 , H04L25/03305 , H04L25/03324 , H04L25/03891 , H04L25/061 , H04L27/3488 , H04L27/38 , H04L2025/03611 , H04N19/39
摘要： A partial bit demodulation section demodulates partial bits among a plurality of bits that form one symbol of each modulated signal using a detection method different from likelihood detection. Signal point reduction sections reduce the number of candidate signal points using demodulated partial bits. A likelihood detection section obtains received digital signals by performing likelihood detection based on the Euclidian distances between the reduced candidate signal points and a reception point. Only some bits which are unlikely to be erroneous are found by the partial bit demodulation section, and other bits can be found by the likelihood detection section, enabling bit error rate performances to be effectively improved with a comparatively small computational complexity.
摘要翻译：部分位解调部分使用与似然检测不同的检测方法解调形成每个调制信号的一个符号的多个比特中的部分比特。信号点减少部分使用解调的部分比特减少候选信号点的数量。似然度检测部通过基于缩小候补信号点与接收点之间的欧几里德距离进行似然度检测来获得接收数字信号。只有部分比特解调部分才能发现一些不太可能出错的比特，可以通过似然度检测部分找到其他比特，从而能够以较小的计算复杂度有效提高误码率性能。

72. 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。

73. 发明授权

US07570626B2 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：US07570626B2
公开(公告)日：2009-08-04
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： 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 transmission method for transmitting an orthogonal frequency division multiplexing signal the method includes composing, on a per unit time basis, a plurality of carrier groups each composed of one or more subcarriers, assigning, on a per unit time basis, transmission data for a plurality of transmission destination terminals, to the plurality of carrier groups and transmitting the assigned transmission data.
摘要翻译：一种用于发送正交频分多路复用信号的传输方法，包括：以每单位时间为基准构成由一个或多个子载波构成的多个载波组，以单位时间为基准分配多个的发送目的地终端发送到多个载波组，并发送所分配的发送数据。

74. 发明申请

US20080240289A1 PILOT SIGNAL TRANSMISSION TECHNIQUE AND DIGITAL COMMUNICATION SYSTEM USING SAME 审中-公开
标题翻译：引导信号传输技术和数字通信系统
公开(公告)号：US20080240289A1
公开(公告)日：2008-10-02
申请号：US12132817
申请日：2008-06-04
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： H04L27/36
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。

75. 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。

76. 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。

77. 发明申请

US20060189279A1 Radio transmitting apparatus and radio transmission method 有权
标题翻译：无线电发射装置和无线电传输方法
公开(公告)号：US20060189279A1
公开(公告)日：2006-08-24
申请号：US10566682
申请日：2004-08-04
申请人： Kiyotaka Kobayashi , Yutaka Murakami , Masayuki Orihashi
发明人： Kiyotaka Kobayashi , Yutaka Murakami , Masayuki Orihashi
IPC分类号： H04B1/02 , H04B7/02
CPC分类号： H04L27/2649 , H04W52/42
摘要： A radio transmitting apparatus that has a plurality of antennas and changes the number of modulated signals transmitted simultaneously according to the propagation environment and so forth. A transmission power changing section 12 of a radio transmitting apparatus of the present invention adjusts the pilot symbol signal level so as to match the data symbol composite signal level according to the number of transmit modulated signals set by a modulated signal number setting section 11. By this means, the operating range of received pilot symbols and the operating range of received data symbols become approximately the same on the receiving side, enabling pilot symbol quantization error to be reduced. As a result, the precision of radio wave propagation environment estimation, time synchronization, and frequency offset estimation using pilot symbols improves, and consequently data reception quality improves.
摘要翻译：具有多个天线的无线发送装置，根据传播环境等改变同时发送的调制信号的数量。本发明的无线发送装置的发送功率变更部12根据由调制信号编号设定部11设定的发送调制信号的数量来调整导频符号信号电平，使其符合数据符号复合信号电平。通过这种方式，接收侧的接收导频符号的工作范围和接收数据符号的工作范围在接收侧变得大致相同，能够降低导频符号量化误差。结果，使用导频符号的无线电波传播环境估计，时间同步和频率偏移估计的精度提高，因此提高了数据接收质量。

78. 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。

79. 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。

80. 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。

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