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    • 23. 发明申请
    • WIRELESS TRANSMISSION APPARATUS AND TRANSMISSION POWER CONTROL METHOD
    • 无线传输装置和传输功率控制方法
    • US20120094709A1
    • 2012-04-19
    • US13375386
    • 2010-06-17
    • Yoshihiko OgawaKenichi MiyoshiAkihiko NishioDaichi ImamuraSeigo Nakao
    • Yoshihiko OgawaKenichi MiyoshiAkihiko NishioDaichi ImamuraSeigo Nakao
    • H04W52/04
    • H04L27/2602H04B7/0697H04L27/3411H04W52/16H04W52/243H04W52/325H04W52/42
    • Disclosed are a wireless transmission apparatus and transmission power control method which improve the error rate characteristics of data signals even when the number of streams of data signals increases, without increasing the amount of signaling. The relationship between the number of streams of data signals in each antenna (201-1, 201-2) and the data signal and pilot-signal transmission power ratio at each antenna (201-1,201-2) is stored. Specifically, a relationship where the data signal and pilot signal transmission power ratio at each antenna increases as the number of streams of data signals at each antenna increases is stored. A transmission power control unit (205) determines the data signal and pilot signal transmission power ratio on the basis of the information of the number of streams of data signals at each antenna (201-1, 201-2) that were output from a decoding unit (204), controls the transmission power of the pilot signals on the basis of the determined transmission power ratio, and outputs to a multiplexing unit (210).
    • 公开了即使当数据信号流的数量增加而不增加信令量时,也可以提高数据信号的误码率特性的无线发送装置和发送功率控制方法。 存储每个天线(201-1,201-2)中的数据信号流数与每个天线(201-1,201-2)之间的数据信号和导频信号发送功率比之间的关系。 具体地说,存储每个天线上的数据信号和导频信号发送功率比随着每个天线的数据信号数量的增加而增加的关系。 发送功率控制部(205)基于从解码(201-1,201-2)输出的每个天线(201-1,201-2)的数据信号流的信息,确定数据信号和导频信号发送功率比 单元(204)根据确定的发送功率比来控制导频信号的发送功率,并输出到复用单元(210)。
    • 25. 发明申请
    • RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD
    • 无线电发射装置和无线电发射方法
    • US20090245413A1
    • 2009-10-01
    • US12064698
    • 2006-08-25
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • H04L27/00H04L7/04
    • H04L27/2605H04L27/2607
    • A radio transmitting apparatus and a radio transmitting method wherein a guard interval having a variable length is used to allow a radio receiving apparatus to precisely and easily obtain a symbol synchronization. In the radio transmitting apparatus, a GI adding part (103) adds a short GI or a long GI, which is longer than the short GI, to the head of each of data parts into which a modulated signal outputted from a modulating part (102) has been put by a predetermined number of symbols. In a case of adding the short GI, the GI adding part (103) copies the symbols of a portion of the data part including the rear thereof, and adds the copied symbols to the head of that data part, thereby providing a GI. In a case of adding the long GI, the GI adding part (103) copies the symbols of a portion of a second data part, which immediately follows the first data part, including the rear of the second data part. Then, the GI adding part (103) adds the copied symbols to the head of the first data part, thereby providing the second GI. Moreover, the GI adding part (103) copies the symbols of a portion of the first data part including the rear thereof, and then adds the copied symbols to the head of the second GI added to the first data part, thereby providing the first GI.
    • 一种无线发送装置和无线发送方法,其中使用具有可变长度的保护间隔来允许无线电接收装置精确且容易地获得符号同步。 在无线发送装置中,GI附加部(103)将短GI(GI)或长GI(长GI)添加到从调制部(102)输出的调制信号的数据部分的头部 )已经被放置了预定数量的符号。 在添加短GI的情况下,GI附加部分(103)复制包括其后部的数据部分的一部分的符号,并将复制的符号添加到该数据部分的头部,从而提供GI。 在添加长GI的情况下,GI附加部分(103)复制紧跟在第一数据部分之后的包括第二数据部分的后部的第二数据部分的一部分的符号。 然后,GI添加部分(103)将复制的符号添加到第一数据部分的头部,从而提供第二GI。 此外,GI附加部(103)将包含其后部的第一数据部分的一部分的符号复制,然后将复制的符号与添加到第一数据部分的第二GI的头相加,从而提供第一GI 。
    • 27. 发明授权
    • Transmission apparatus and transmission method
    • 传输装置及传输方式
    • US08401100B2
    • 2013-03-19
    • US13316249
    • 2011-12-09
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • Kenichi MiyoshiAkihiko NishioDaichi Imamura
    • H04K1/10
    • H04L27/2647H04B7/0842
    • A wireless receiving apparatus capable of efficiently removing interference signals in a multicarrier communication. In a mobile station incorporating this wireless receiving apparatus, a selecting part selects a plurality of the same symbols in accordance with a mapping pattern established at the time of generating OFDM symbols in a base station. A correlation value calculating part determines correlation values between the subcarriers of the same symbols to generate an R-matrix, and further determines an inverse matrix of the R-matrix. An MMSE processing part performs an MMSE processing to determine a weight from both a P-vector received from a channel estimating part and the inverse matrix of the R-matrix received from the correlation value calculating part. Multipliers multiply each of the symbols selected by the selecting part by the weight determined by the MMSE processing part. A combining part combines the symbols as multiplied by the weight.
    • 一种能够有效地去除多载波通信中的干扰信号的无线接收装置。 在包含该无线接收装置的移动台中,选择部根据在基站中生成OFDM符号时所建立的映射模式来选择多个相同符号。 相关值计算部分确定相同符号的子载波之间的相关值以产生R矩阵,并进一步确定R矩阵的逆矩阵。 MMSE处理部分执行MMSE处理以从从信道估计部分接收的P矢量和从相关值计算部分接收的R矩阵的逆矩阵确定权重。 乘法器将由选择部分选择的每个符号乘以由MMSE处理部分确定的权重。 组合部分将符号乘以重量。