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    • 2. 发明授权
    • Coding and modulation selecting method and wireless communication equipment
    • 编码和调制选择方法及无线通信设备
    • US08467471B2
    • 2013-06-18
    • US12554145
    • 2009-09-04
    • Takashi YanoMasashi NaitoTakehiko Kobayashi
    • Takashi YanoMasashi NaitoTakehiko Kobayashi
    • H04L27/00
    • H04L1/0026H04L1/0016H04L1/0021H04L1/1845
    • Disclosed herewith is a radio communication apparatus capable of selecting proper one of plural communication modes such as a MIMO communication system so as to obtain a higher communication rate within a range in which chain retransmission occurrence is prevented. The MIMO system deciding section of the transmitter unit decides a proper MIMO system with reference to the CQI value demultiplexed by a demultiplexer and the AMC table controlling section changes the MCS value step by step according to the transmission count and the result (success/failure) of the communication. Furthermore, the AMC table controlling section updates the mean rate in the measured rate table when the subject data is received successfully or when the transmission count reaches the maximum value.
    • 这里公开了一种无线电通信装置,其能够选择诸如MIMO通信系统的多种通信模式中的适当一种,以便在防止链路重发发生的范围内获得更高的通信速率。 发射机单元的MIMO系统判定部分参照由解复用器解复用的CQI值决定适当的MIMO系统,并且AMC表控制部分根据传输计数和结果(成功/失败)逐步改变MCS值, 的沟通。 此外,当成功接收到被摄体数据或发送计数达到最大值时,AMC表控制部分更新测量速率表中的平均速率。
    • 3. 发明授权
    • Maximum likelihood decoding method and receiver
    • 最大似然解码方法和接收机
    • US08681909B2
    • 2014-03-25
    • US12182315
    • 2008-07-30
    • Hironari MasuiTakashi YanoTakehiko Kobayashi
    • Hironari MasuiTakashi YanoTakehiko Kobayashi
    • H04L27/06
    • H04L25/0246H04B7/0413H04L25/03216H04L2025/03426
    • Provided is a maximum likelihood decoding method that includes the steps of; firstly arranging channel impulse responses corresponding to the received signals in a plurality of different orders; secondly specifying the same number of parts as the plurality of different orders in which the channel impulse responses are arranged, so that the received signals are placed in each of the parts; thirdly generating channel matrices each having the channel impulse responses as matrix elements, by using the channel impulse responses arranged in the plurality of different orders, obtaining triangular matrices by applying QR decomposition to the generated channel matrices, and determining at least one combination candidate for each of the parts of the plurality of transmission signals by using the obtained triangular matrices; and fourthly selecting the combination candidates so that a Euclidean distance between the combination candidates determined in the third step is shortest.
    • 提供了一种最大似然解码方法,包括以下步骤: 首先以多个不同的顺序排列与接收到的信号对应的信道脉冲响应; 其次指定与布置信道脉冲响应的多个不同顺序相同数量的部分,使得接收到的信号被放置在每个部分中; 通过使用以多个不同阶数排列的信道脉冲响应,产生每个具有信道脉冲响应的信道矩阵作为矩阵元素,通过对所生成的信道矩阵应用QR分解获得三角矩阵,以及为每个信道矩阵确定至少一个组合候选 通过使用所获得的三角矩阵来生成多个传输信号的部分; 并且第四选择组合候选,使得在第三步骤中确定的组合候选之间的欧几里德距离最短。
    • 4. 发明申请
    • MAXIMUM LIKELIHOOD DECODING METHOD AND RECEIVER
    • 最大LIKELIHOOD解码方法和接收器
    • US20090034664A1
    • 2009-02-05
    • US12182315
    • 2008-07-30
    • Hironari MasuiTakashi YanoTakehiko Kobayashi
    • Hironari MasuiTakashi YanoTakehiko Kobayashi
    • H04L27/06
    • H04L25/0246H04B7/0413H04L25/03216H04L2025/03426
    • Provided is a maximum likelihood decoding method that includes the steps of; firstly arranging channel impulse responses corresponding to the received signals in a plurality of different orders; secondly specifying the same number of parts as the plurality of different orders in which the channel impulse responses are arranged, so that the received signals are placed in each of the parts; thirdly generating channel matrices each having the channel impulse responses as matrix elements, by using the channel impulse responses arranged in the plurality of different orders, obtaining triangular matrices by applying QR decomposition to the generated channel matrices, and determining at least one combination candidate for each of the parts of the plurality of transmission signals by using the obtained triangular matrices; and fourthly selecting the combination candidates so that a Euclidean distance between the combination candidates determined in the third step is shortest.
    • 提供了一种最大似然解码方法,包括以下步骤: 首先以多个不同的顺序排列与接收到的信号对应的信道脉冲响应; 其次指定与布置信道脉冲响应的多个不同顺序相同数量的部分,使得接收到的信号被放置在每个部分中; 通过使用以多个不同阶数排列的信道脉冲响应,产生每个具有信道脉冲响应的信道矩阵作为矩阵元素,通过对所生成的信道矩阵应用QR分解获得三角矩阵,以及为每个信道矩阵确定至少一个组合候选 通过使用所获得的三角矩阵来生成多个传输信号的部分; 并且第四选择组合候选,使得在第三步骤中确定的组合候选之间的欧几里德距离最短。
    • 5. 发明授权
    • Maximum likelihood decoding method, equipment, and receiver
    • 最大似然解码方法,设备和接收机
    • US08477883B2
    • 2013-07-02
    • US12192279
    • 2008-08-15
    • Hironari MasuiTakashi YanoTakehiko Kobayashi
    • Hironari MasuiTakashi YanoTakehiko Kobayashi
    • H04L27/06
    • H04L25/03292H04L25/0206H04L25/0244H04L25/0246H04L2025/03426
    • Provided is a maximum likelihood decoding method of separating and estimating multiple transmitted signals transmitted by multiple transmitter antennas from multiple received signals received by multiple receiver antennas, comprising: a first step of generating a channel matrix based on channel impulse responses corresponding to the received signals; a second step of dividing the generated channel matrix into multiple sub-matrices, of identifying parts of the received signals corresponding to the sub-matrices obtained through the division, and of transforming the sub-matrices obtained through the division, by using inverse matrices of the sub-matrices obtained through the division; a third step of applying QR decomposition to the transformed sub-matrices to obtain triangular matrices, and of transforming the received signals of the parts by using the obtained triangular matrices; and a fourth step of determining one combination candidate for the parts of the transmitted signals corresponding to the transformed received signals.
    • 提供了一种从多个接收机天线接收的多个接收信号中分离和估计由多个发射机天线发射的多个发射信号的最大似然解码方法,包括:基于对应于接收信号的信道脉冲响应产生信道矩阵的第一步骤; 将生成的信道矩阵划分成多个子矩阵的第二步骤是识别与通过除法获得的子矩阵相对应的接收信号的部分,并且通过使用逆矩阵 通过分割获得的子矩阵; 将QR分解应用于经变换的子矩阵以获得三角矩阵的第三步骤,以及通过使用获得的三角矩阵来变换部分的接收信号; 以及第四步骤,确定与变换后的接收信号对应的发送信号的一部分的一个组合候选。
    • 6. 发明授权
    • Transmitter
    • 发射机
    • US08605813B2
    • 2013-12-10
    • US13579387
    • 2011-02-25
    • Hiroyuki AkutagawaTakashi KajiyamaTakehiko Kobayashi
    • Hiroyuki AkutagawaTakashi KajiyamaTakehiko Kobayashi
    • H04L27/00
    • H04L27/2071H04B7/0669H04L1/0643
    • In a transmitter, communication is efficiently performed by a DSTBC scheme.In a transmitter which transmits a signal using the DSTBC scheme, the content of a transmission process is set so that a state where a symbol is not present is realized at the origin of signal arrangement in a DSTBC encoder. As an example, the setting is performed so that an input to the DSTBC encoder is calculated using a predetermined operation in which a state where a symbol is not present is realized at the origin of signal arrangement in the DSTBC encoder. As another example, the setting is performed so that initial values in which a state where a symbol is not present is realized at the origin of signal arrangement in the DSTBC encoder are used in differential encoding of the DSTBC encoder.
    • 在发射机中,通过DSTBC方案有效地进行通信。 在使用DSTBC方案发送信号的发送机中,将发送处理的内容设定为在DSTBC编码器的信号原理的原点实现符号不存在的状态。 作为示例,执行设置,使得使用在DSTBC编码器中的信号排列的原点实现不存在符号的状态的预定操作来计算到DSTBC编码器的输入。 作为另一示例,执行设置,使得在DSTBC编码器中的信号排列的原点处实现其中不存在符号的状态的初始值用于DSTBC编码器的差分编码。
    • 7. 发明授权
    • Demodulator including adaptive equalizer and demodulating method in digital communications
    • 解调器包括数字通信中的自适应均衡器和解调方法
    • US06246732B1
    • 2001-06-12
    • US09154716
    • 1998-09-17
    • Takehiko KobayashiYukinari Fujiwara
    • Takehiko KobayashiYukinari Fujiwara
    • H03D104
    • H04L25/0216H04L1/0036H04L25/0228H04L2025/03535
    • An apparatus comprising an unnecessary frequency component removal unit for removing unnecessary frequency components from a signal supplied from a detector, a unit for obtaining a measured value of delay spread of the signal supplied from the unnecessary frequency component removal unit, an adaptive equalizer for performing adaptive equalization on the signal supplied from the unnecessary frequency component removal unit, and a decoding unit for decoding an input signal, wherein the signal from the unnecessary frequency component removal unit is supplied to the decoding unit through the adaptive equalizer when the measured value of delay spread is larger than a predetermined value, whereas the signal from the unnecessary frequency component removal unit is supplied to the decoding unit without being passed through the adaptive equalizer when the measured value of delay spread is not larger than the predetermined value.
    • 一种装置,包括:不必要的频率分量去除单元,用于从检测器提供的信号中去除不必要的频率分量,用于获得从不必要的频率分量去除单元提供的信号的延迟扩展的测量值的单元,用于执行自适应的自适应均衡器 对不必要频率分量去除单元提供的信号进行均衡,以及用于对输入信号进行解码的解码单元,其中当延迟扩展的测量值延迟时,来自不必要频率分量去除单元的信号通过自适应均衡器提供给解码单元 而当延迟扩展的测量值不大于预定值时,来自不必要频率分量去除单元的信号被提供给解码单元而不通过自适应均衡器。
    • 9. 发明申请
    • TRANSMITTER AND TRANSMISSION METHOD
    • 发射机和传输方法
    • US20130022058A1
    • 2013-01-24
    • US13638657
    • 2011-04-06
    • Hiroyuki AkutagawaTakehiko Kobayashi
    • Hiroyuki AkutagawaTakehiko Kobayashi
    • H04L12/56
    • H04L7/041
    • In a transmitter which transmits a signal by a DSTBC scheme, communication is efficiently performed by the DSTBC scheme.In the transmitter which transmits the signal by the DSTBC scheme, a frame in which a sync word is disposed in a predetermined position subsequent to the head is used. Initial value control means 31 to 35 set initial values of differential encoding (differential encoding unit 15) when a DSTBC encoder which processes a transmission target processes the frame on the basis of values from the head of the frame to a position before the sync word so that a signal point corresponding to the position immediately before the sync word in the DSTBC encoder which processes the transmission target becomes a specific point.
    • 在通过DSTBC方案发送信号的发射机中,通过DSTBC方案有效地进行通信。 在通过DSTBC方案发送信号的发送机中,使用其中同步字设置在头后的预定位置的帧。 当处理发送目标的DSTBC编码器基于从帧的头部到同步字之前的位置的值处理该帧时,初始值控制装置31至35设置差分编码的初始值(差分编码单元15) 与处理发送目标的DSTBC编码器中的同步字之前的位置对应的信号点变为特定点。