公开(公告)号：EP0806844B1

公开(公告)日：2006-08-23

申请号：EP96940143.9

申请日：1996-11-28

申请人： NTT DoCoMo, Inc.

发明人： SAWAHASHI, Mamoru ,  ANDO, Hidehiro ,  MIKI, Yoshinori ,  HIGUCHI, Kenichi ,  TANAKA, Shinya

IPC分类号： H04B7/08 ,  H04B7/26 ,  H04B1/707 ,  H04J13/04

CPC分类号： H04B1/709 ,  H04B1/707 ,  H04B1/712 ,  H04B7/0851 ,  H04B7/0857 ,  H04B7/086 ,  H04L1/02 ,  H04L1/06

摘要： A weight coefficient is feedback-controlled so as to maximize the ratio of desired signal power to interference power (SIR), whereby it is possible to improve reception quality and to increase the number of subscribers per cell and it is also possible to increase the speed of establishment of diffused code synchronization and the speed of convergence of the weight coefficient. A coherence adaptive diversity arrangement to which absolute synchronization detection is applicable is adopted. The weighht coefficient of each diversity branch is adaptively feedback-controlled, whereby it is possible to reduce the influence of interference power from other communicators, so that the number of subscribers per cell can be increased. Furthermore, a direction in which a highest reception SIR is obtainable is determined by rotating an antenna with directivity of predetermined angle being given to it. After that, by setting the initial value of the weight coefficient to the direction, the speed of convergence of the weight coefficient can be increased.

公开(公告)号：EP1100204A1

公开(公告)日：2001-05-16

申请号：EP00921112.9

申请日：2000-05-09

申请人： NTT DoCoMo, Inc.

发明人： OKUMURA, Yukihiko ,  ANDO, Hidehiro

IPC分类号： H03M13/00

CPC分类号： H04L1/0071 ,  H03M13/271 ,  H03M13/2789 ,  H03M13/2792 ,  H04L1/004 ,  H04L1/0041 ,  H04L1/0078 ,  H04L25/023 ,  H04L27/20 ,  H04L27/22

摘要： An effective data multiplexing method wherein an error correction ability is exerted at the maximum so that data transmission quality is improved and a data transmitting method in which an interleaving process applicable to data transmission using interpolation pilot signal is performed are provided. The data multiplexing method includes the steps of: coding input data for each input channel; multiplexing said data which is coded; performing an interleaving process on said data which is multiplexed; and outputting said data. In the data transmitting method, when an interleaving process is performed, an interleaver is used in which the number of columns of the interleaver is twice as many as the number of slots of a frame.

摘要翻译： 的纠错能力的有效数据的复用方法worin在最大施加象数据传输质量提高，并且被提供在其中使用内插的导频信号执行交织处理适用于数据传输的数据传输方法。 的数据复用方法包括以下步骤：编码每个输入通道的输入数据; 所述多路复用数据全部被编码; 在执行所述数据的所有即复用交织处理; 和输出挺表示数据。 在该数据传送方法，当所述的交织方法是在交织器执行的用于在其中交错器的列数为2倍一样多的帧的时隙的数目。

公开(公告)号：EP2451205A1

公开(公告)日：2012-05-09

申请号：EP10794253.4

申请日：2010-07-02

申请人： NTT DOCOMO, INC.

发明人： HAYASHI, Takahiro ,  MASUDA, Masafumi ,  ANDO, Hidehiro ,  SATO, Takaaki ,  YASUDA, Yoshiyuki

IPC分类号： H04W28/02 ,  H04L29/06

CPC分类号： H04L69/324 ,  H04L69/18 ,  H04W28/06 ,  H04W76/20

摘要： Disclosed is a communication method for switching between a first connection state, in which a data unit is transmitted in a first size, and a second connection state, in which a data unit is transmitted in a second size which is larger than the first size. The communication method comprises a step of maintaining the size of a data unit at the first size in a case where there is a transition from the first connection state to the second connection state after there had been a transition from the second connection state to the first connection state.

摘要翻译： 公开了一种通信方法，用于在其中以第一大小发送数据单元的第一连接状态和第二连接状态之间进行切换，其中以第二大小发送数据单元。 通信方法包括在从第二连接状态到第一连接状态的转变之后从第一连接状态到第二连接状态的转变的情况下将数据单元的尺寸维持在第一尺寸的步骤 连接状态。

公开(公告)号：EP1089451B1

公开(公告)日：2009-11-25

申请号：EP00913048.5

申请日：2000-03-31

申请人： NTT DoCoMo, Inc.

发明人： OKUMURA, Yukihiko ,  ANDO, Hidehiro ,  USUDA, Masafumi ,  ISHIKAWA, Yoshihiro ,  ONOE, Seizo

IPC分类号： H04B1/707 ,  H04J13/04 ,  H04L27/01 ,  H04B7/26 ,  H04W16/00 ,  H04L25/02

CPC分类号： H04L25/0234 ,  H04B1/707 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0228

摘要： 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.

公开(公告)号：EP1100204B1

公开(公告)日：2006-07-05

申请号：EP00921112.9

申请日：2000-05-09

申请人： NTT DoCoMo, Inc.

发明人： OKUMURA, Yukihiko ,  ANDO, Hidehiro

IPC分类号： H03M13/00 ,  H03M13/27

CPC分类号： H04L1/0071 ,  H03M13/271 ,  H03M13/2789 ,  H03M13/2792 ,  H04L1/004 ,  H04L1/0041 ,  H04L1/0078 ,  H04L25/023 ,  H04L27/20 ,  H04L27/22

摘要： An efficient multiplexing method for delivering a maximum error correction capability to improve a data transmission quality, and a data signal transmission method for performing an interleaving processing suitable for a data signal transmission method using interpolation pilot signals. The multiplexing method encodes input data for each input channel, multiplexes the encoded data, performs an interleaving processing, for randomizing rows, on the multiplexed data, and outputs data. The data signal transmission method uses, at an interleaving processing, two times as many interleavers as the number of slots in a frame.

公开(公告)号：EP1089451A1

公开(公告)日：2001-04-04

申请号：EP00913048.5

申请日：2000-03-31

申请人： NTT DoCoMo, Inc.

发明人： OKUMURA, Yukihiko ,  ANDO, Hidehiro ,  USUDA, Masafumi ,  ISHIKAWA, Yoshihiro ,  ONOE, Seizo

IPC分类号： H04B1/707 ,  H04J13/04 ,  H04L27/01 ,  H04B7/26 ,  H04Q7/36

CPC分类号： H04L25/0234 ,  H04B1/707 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0228

摘要： 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.

摘要翻译： 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。 还可以基于经解调的数据的可靠性判断的结果在预定的时间段内选择一些加权序列。 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。