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    • 6. 发明授权
    • Channel estimation device and method, demodulation device and method, and fading frequency decision device and method
    • 信道估计装置及方法,解调装置及方法,衰落频率决策装置及方法
    • US08295332B2
    • 2012-10-23
    • US13033035
    • 2011-02-23
    • Yukihiko OkumuraHidehiro AndoMasafumi UsudaYoshihiro IshikawaSeizo Onoe
    • Yukihiko OkumuraHidehiro AndoMasafumi UsudaYoshihiro IshikawaSeizo Onoe
    • H04B1/69H04L25/20
    • H04L25/0234H04B1/707H04B1/7115H04B2201/70701H04L25/0228
    • In this invention, a channel estimation value of data symbols of a data channel is calculated by weighting and averaging pilot symbols in a parallel time multiplexing method. Also, a channel estimation value of data symbols during each data symbol interval is calculated by dividing data symbols in a slot into a plurality of data symbol intervals, selecting pilot symbols suitable for calculation of a channel estimation value of data symbols during each data symbol interval and weighting and averaging that pilot symbols. Also, a fading frequency is detected based on an inner product value of pilot symbols. Weighting factors are changed based on the detected fading frequency. Also, a channel estimation value is calculated by weighting and averaging pilot signals using a plurality of weighting sequences. The calculated channel estimation value is used to demodulate received data. The output data with the highest quality is selected by judging reliability of these plurality of demodulated data. It is also possible to select some weighting sequences based on the result of the reliability judgment of the demodulated data for predetermined period of time. In this case, after the selection, demodulation is performed by using these selected weighting sequences only.
    • 在本发明中,通过并行时间复用方法对导频符号进行加权和平均来计算数据信道的数据符号的信道估计值。 此外,通过将时隙中的数据符号划分为多个数据符号间隔来计算每个数据符号间隔期间的数据符号的信道估计值,在每个数据符号间隔期间选择适合于计算数据符号的信道估计值的导频符号 并对该导频符号进行加权和平均。 此外,基于导频符号的内积值来检测衰落频率。 加权因子根据检测到的衰落频率而改变。 此外,通过使用多个加权序列对导频信号进行加权和平均来计算信道估计值。 所计算的信道估计值用于解调接收的数据。 通过判断这些多个解调数据的可靠性来选择具有最高质量的输出数据。 也可以基于解调数据的可靠性判断的结果来选择一些加权序列预定的时间段。 在这种情况下,在选择之后,仅通过使用这些选择的加权序列来执行解调。
    • 8. 发明授权
    • Data transmission method, data transmission system, transmitting method, receiving method, transmitting apparatus and receiving apparatus
    • 数据传输方法,数据传输系统,发送方式,接收方式,发送装置和接收装置
    • US08010878B2
    • 2011-08-30
    • US11910248
    • 2006-03-30
    • Yukihiko Okumura
    • Yukihiko Okumura
    • H03M13/00
    • H04L1/0046H03M13/09H04L1/0041H04L1/0054H04L1/0061H04L1/0075H04L1/0083H04L1/0091
    • In variable rate data transmission, a data transmission method or the like is provided which enables adjustment for achieving desired erroneous rate detection. A transmitting side places a calculated error detecting code after the transmission data in each frame, generates frame data in which an R-bit series before the final bit position of the error detecting code is rearranged in inverse order, and transmits. A receiving side assumes the transmission data and error detecting code by assuming the final bit position of the frame data in each frame, conducting the assumption presuming that the rearrangement in inverse order has occurred on the transmitting side. Among the assumed final bit positions, the position determined to be errorless as a result of the error detection based on the assumed transmission data and error detecting code is determined as the final bit position. R can be greater or less than the number of bits of the error detecting code.
    • 在可变速率数据传输中,提供数据传输方法等,其能够进行调整以实现期望的错误率检测。 发送侧将计算出的错误检测码放在每帧中的发送数据之后,生成帧数据,其中错误检测码的最后位位置之前的R比特序列以相反的顺序重排,并发送。 接收侧通过假设每帧中的帧数据的最终比特位置来假定发送数据和错误检测码,进行假定在发送侧发生了相反顺序的重新排列的假设。 在假定的最终位位置中,作为基于假定的发送数据和错误检测码的错误检测的结果而被确定为无错的位置被确定为最终位位置。 R可以大于或小于错误检测码的位数。
    • 9. 发明申请
    • CHANNEL ESTIMATION DEVICE AND METHOD, DEMODULATION DEVICE AND METHOD, AND FADING FREQUENCY DECISION DEVICE AND METHOD
    • 信道估计装置和方法,解调装置和方法以及渐变频率决策装置和方法
    • US20110142102A1
    • 2011-06-16
    • US13033035
    • 2011-02-23
    • Yukihiko OkumuraHidehiro AndoMasafumi UsudaYoshihiro IshikawaSeizo Onoe
    • Yukihiko OkumuraHidehiro AndoMasafumi UsudaYoshihiro IshikawaSeizo Onoe
    • H04B1/10H04L27/06H04B1/707
    • H04L25/0234H04B1/707H04B1/7115H04B2201/70701H04L25/0228
    • In this invention, a channel estimation value of data symbols of a data channel is calculated by weighting and averaging pilot symbols in a parallel time multiplexing method. Also, a channel estimation value of data symbols during each data symbol interval is calculated by dividing data symbols in a slot into a plurality of data symbol intervals, selecting pilot symbols suitable for calculation of a channel estimation value of data symbols during each data symbol interval and weighting and averaging that pilot symbols. Also, a fading frequency is detected based on an inner product value of pilot symbols. Weighting factors are changed based on the detected fading frequency. Also, a channel estimation value is calculated by weighting and averaging pilot signals using a plurality of weighting sequences. The calculated channel estimation value is used to demodulate received data. The output data with the highest quality is selected by judging reliability of these plurality of demodulated data. It is also possible to select some weighting sequences based on the result of the reliability judgment of the demodulated data for predetermined period of time. In this case, after the selection, demodulation is performed by using these selected weighting sequences only.
    • 在本发明中,通过并行时间复用方法对导频符号进行加权和平均来计算数据信道的数据符号的信道估计值。 此外,通过将时隙中的数据符号划分为多个数据符号间隔来计算每个数据符号间隔期间的数据符号的信道估计值,在每个数据符号间隔期间选择适合于计算数据符号的信道估计值的导频符号 并对该导频符号进行加权和平均。 此外,基于导频符号的内积值来检测衰落频率。 加权因子根据检测到的衰落频率而改变。 此外,通过使用多个加权序列对导频信号进行加权和平均来计算信道估计值。 所计算的信道估计值用于解调接收的数据。 通过判断这些多个解调数据的可靠性来选择具有最高质量的输出数据。 也可以基于解调数据的可靠性判断的结果来选择一些加权序列预定的时间段。 在这种情况下,在选择之后,仅通过使用这些选择的加权序列来执行解调。
    • 10. 发明申请
    • COORDINATED TRANSMISSION METHOD, COORDINATED TRANSMISSION SYSTEM, CENTRAL STATION AND RADIO BASE STATION
    • 协调传输方式,协调传输系统,中心站和无线基站
    • US20110080884A1
    • 2011-04-07
    • US12896082
    • 2010-10-01
    • Yusuke OhwatariAnass BenjebbourYukihiko OkumuraJunichiro Hagiwara
    • Yusuke OhwatariAnass BenjebbourYukihiko OkumuraJunichiro Hagiwara
    • H04W4/00H04B7/00
    • H04B7/022H04W16/28
    • A coordinated transmission method of the invention has the steps of selecting a directional pattern corresponding to an area in which a radio terminal locates, from among a plurality of directional patterns determined respectively corresponding to a plurality of resources in frequency domains where the plurality of directional patterns is configured so that a plurality of radio base stations surrounding the area transmits, to the area, directional beams of same frequency domain resources to face one another, while not transmitting the directional beams of the same frequency domain resources using the same frequency domain resources to areas adjacent to the area, and of distributing a signal to transmit to the radio terminal according to the selected directional pattern, determining a frequency domain and directions of directional beams regarding the distributed signal, and delivering the signal to each of the plurality of radio base stations that simultaneously transmits the signal to the radio terminal.
    • 本发明的协调传输方法具有以下步骤:从分别对应于多个方向图中的多个资源的多个资源中确定的多个方向图中选择与无线电终端所在的区域相对应的方向图, 被配置为使得围绕该区域的多个无线电基站将相同频域资源的定向波束面向彼此发送,同时不使用相同的频域资源发送相同频域资源的定向波束 与该区域相邻的区域,并且根据所选择的方向图分发信号到无线终端,确定关于分布式信号的定向波束的频域和方向,以及将信号传送到多个无线电基站 同时发送信号的站 无线电终端。