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    • 132. 发明申请
    • WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD
    • 无线通信设备,无线通信系统和无线通信方法
    • US20110261894A1
    • 2011-10-27
    • US13141743
    • 2010-01-06
    • Qian YuLei HuangMasayuki HoshinoDaichi Imamura
    • Qian YuLei HuangMasayuki HoshinoDaichi Imamura
    • H04B7/02H04L25/03
    • H04B7/0456H04B7/002H04B7/0413H04B7/0469H04B7/0617H04B7/0634H04B7/0639H04B7/0691H04B7/10H04L25/0224H04L25/0248H04L25/03898H04L25/03961H04L2025/03808
    • In a MIMO system using a cross-polarized antenna structure, even if no ideal XPD can be obtained, the interference between different polarized waves can be reduced to allow an effective precoding to be executed. When a MIMO communication is performed between a transmitter (250) and a receiver (260) each using a cross-polarized antenna structure, a channel estimating and precoding selection section (214) of the receiver (260) performs a channel estimation of MIMO channels from the transmitter to the receiver, decides a precoding matrix (P) of a projection matrix for mutually orthogonalizing or substantially orthogonalizing the channel response matrixes for respective different polarized waves, and feeds the determined precoding matrix (P) back to the transmitter (250). In the transmitter (250), a precoding processing section (208) applies the precoding matrix (P) to the spatial stream corresponding to one of the polarized waves to perform a precoding, thereby allowing the transmitter (250) to transmit the polarized waves with the orthogonality therebetween maintained.
    • 在使用交叉极化天线结构的MIMO系统中,即使不能获得理想的XPD,也可以减小不同极化波之间的干扰,从而实现有效的预编码。 当在每个使用交叉极化天线结构的发射机(250)和接收机(260)之间执行MIMO通信时,接收机(260)的信道估计和预编码选择部分(214)执行MIMO信道的信道估计 从发射机到接收机,决定用于相互正交化或基本正交化各个不同极化波的信道响应矩阵的投影矩阵的预编码矩阵(P),并将所确定的预编码矩阵(P)馈送给发射机(250) 。 在发射机(250)中,预编码处理部(208)将预编码矩阵(P)应用于与一个偏振波相对应的空间流,以执行预编码,从而允许发射机(250)发射偏振波 保持其间的正交性。
    • 135. 发明申请
    • MIMO TRANSMITTING APPARATUS, MIMO RECEIVING APPARATUS, MIMO TRANSMISSION SIGNAL FORMATION METHOD, AND MIMO TRANSMISSION SIGNAL SEPARATION METHOD
    • MIMO发射设备,MIMO接收设备,MIMO传输信号形成方法和MIMO传输信号分离方法
    • US20110080975A1
    • 2011-04-07
    • US12999603
    • 2009-06-23
    • Takashi TodaMasaru FukuokaSadaki FutagiMasayuki Hoshino
    • Takashi TodaMasaru FukuokaSadaki FutagiMasayuki Hoshino
    • H04L27/04H04L27/06
    • H04B7/0413H04L1/06H04L1/1819H04L1/1887
    • Provided are a MIMO transmitting apparatus, a MIMO receiving apparatus, a MIMO transmission signal formation method, and a MIMO transmission signal separation method that improve a transmission efficiency. In a MIMO communication apparatus (100), a mapping unit (120) maps code words into a transmission stream on a per code-block basis and changes, between when a transport block is initially transmitted and when the transport block is retransmitted, the combinations of the code blocks mapped in the same transmission zone. In a MIMO communication apparatus (200), an interference replica generation unit (260) forms, based on the decoded data of successfully decoded code blocks, an interference replica signal corresponding to the successfully decoded code blocks, and a signal separation unit (220) removes, from a plurality of reception streams received this time, the interference replica signal formed by the interference replica generation unit (260) received before the last time reception streams was received and then separates the reception streams received this time into each stream.
    • 提供了提高传输效率的MIMO发送装置,MIMO接收装置,MIMO发送信号形成方法以及MIMO发送信号分离方法。 在MIMO通信装置(100)中,映射单元(120)在每个码块的基础上将码字映射到传输流中,并且在最初发送传输块和重传传输块时,改变组合 的映射到相同传输区域的代码块。 在MIMO通信装置(200)中,干扰副本生成部(260)基于成功解码的码块的解码数据,形成与成功解码的码块对应的干扰复制信号,信号分离部(220) 从接收到的多个接收流中删除在接收到最后一次接收流之前由干扰副本生成单元(260)形成的干扰复制信号,然后将此次接收到的接收流分离成每个流。
    • 138. 发明申请
    • RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD
    • 无线电通信系统,无线电通信设备和无线电通信方法
    • US20100103044A1
    • 2010-04-29
    • US12532555
    • 2008-03-28
    • Masayuki HoshinoKatsuhiko Hiramatsu
    • Masayuki HoshinoKatsuhiko Hiramatsu
    • H01Q3/00
    • H04B7/063H04B7/0617H04B7/0641H04B7/0695
    • Reliability of beam selection by pre-coding is improved. A user terminal 52 selects an optimum beam (beam number ‘b’) in the next frame (t+1) based on the channel estimation value of a received pilot signal and transmits a difference value D (=b−a) between a beam number ‘a’ at the current transmission notified by a radio base station 51 and the selected beam number ‘b’ selected to be transmitted at the next transmission to the radio base station 51 as a feedback signal. The radio base station 51 previously stores the beam number ‘a’ notified at the previous transmission and combines the beam number based on the difference value D received as the received feedback signal and the previously notified beam number ‘a’ to restore the beam number ‘b’ desired by the user terminal 52. Pre-coding processing adapted to the beam number ‘b’ is performed and transmission to the user terminal 52 is executed in a state in which a beam of the appropriate beam number ‘b’ is formed.
    • 改进了通过预编码的波束选择的可靠性。 用户终端52基于接收到的导频信号的信道估计值来选择下一帧(t + 1)中的最佳波束(波束号'b'),并且在波束之间发送差值D(= b-a) 由无线基站51通知的当前发送的号码“a”和选择在下次发送时发送的选择的波束号码“b”作为反馈信号。 无线基站51预先存储在先前发送时通知的波束号“a”,并根据接收到的差值D作为接收到的反馈信号和先前通知的波束号“a”组合波束号,以恢复波束号“ b'被执行,并且适合于波束号“b”的预编码处理被执行,并且在形成适当波束号“b”的波束的状态下执行到用户终端52的传输。
    • 139. 发明申请
    • METHOD AND SYSTEM FOR DATA TRANSMISSION IN A MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEM
    • 用于多输入多输出(MIMO)系统中数据传输的方法和系统
    • US20100100789A1
    • 2010-04-22
    • US12445277
    • 2007-10-01
    • Qian YuPing LuoMasayuki Hoshino
    • Qian YuPing LuoMasayuki Hoshino
    • H03M13/05G06F11/10
    • H04B7/068H03M13/114H03M13/116H03M13/118H03M13/356H04L1/0041H04L1/0057H04L1/007H04L1/0625
    • A method for data transmission in a multiple input multiple output (MIMO) system. The method for data transmission includes receiving multiple input data streams and performing low density parity check (LDPC) encoding of the input data streams utilising a parity check matrix. The parity check matrix comprises a plurality of sub-parity check matrices for encoding respective associated ones of the input data streams and performing space time encoding for transmitting the LDPC encoded input data streams over a plurality of antennas. The performing of the LDPC encoding of the input data streams includes generating one or more connection matrices, each connection matrix for injecting information of one of the input data streams into the encoding of another one of the input data streams. Each connection matrix is a zero matrix if a lowest parity check protection level based on the sub-parity check matrix for the one of the input data streams is equal to or lower than an assigned parity check protection level for the one input data stream, and a non zero matrix otherwise.
    • 一种用于多输入多输出(MIMO)系统中数据传输的方法。 用于数据传输的方法包括利用奇偶校验矩阵来接收多个输入数据流并执行输入数据流的低密度奇偶校验(LDPC)编码。 奇偶校验矩阵包括多个子奇偶校验矩阵,用于对各个相关的输入数据流进行编码,并执行空间时间编码,用于在多个天线上发送LDPC编码的输入数据流。 执行输入数据流的LDPC编码包括生成一个或多个连接矩阵,每个连接矩阵用于将输入数据流中的一个的信息注入到另一个输入数据流的编码中。 如果基于用于输入数据流之一的子奇偶校验矩阵的最低奇偶校验保护级别等于或低于所述一个输入数据流的分配奇偶校验保护级别,则每个连接矩阵是零矩阵,以及 否则为非零矩阵。
    • 140. 发明申请
    • BASE STATION AND COMMUNICATION SYSTEM
    • 基站和通信系统
    • US20090036153A1
    • 2009-02-05
    • US12278381
    • 2007-01-23
    • Junya YamazakiMasayuki Hoshino
    • Junya YamazakiMasayuki Hoshino
    • H04B7/00
    • H04W74/006H04W48/08H04W52/36H04W52/58H04W74/0866H04W88/08
    • Provided are a communication system and a base station capable of preventing interference between signals and improving the throughput. A base station device (100) includes: a user quantity monitoring unit (130) for monitoring the number of terminals (users) existing in a cell of the local device; a RACH control unit (140) for transmitting control information (frame type identifier) controlling the frame type of RACH corresponding to the number of terminals; and an RF transmission unit (165) for transmitting the control information to the terminals. The RACH control unit (140) performs control in such a way that as the number of terminals increases, the control information amount contained in the frame of the frame type corresponding to the number decreases. Thus, in accordance with the number of users, the control information data amount is reduced and it is possible to transmit a short frame. Even if the number of users increase, it is possible to reduce the possibility of frame conflict in the RACH, thereby improving the throughput.
    • 提供能够防止信号之间的干扰并提高吞吐量的通信系统和基站。 基站装置(100)包括:用于监视存在于本地设备的小区中的终端(用户)数量的用户数量监视单元(130) RACH控制单元,用于发送控制对应于终端数量的RACH的帧类型的控制信息(帧类型标识符); 以及用于将控制信息发送到终端的RF传输单元(165)。 RACH控制单元(140)以这样的方式进行控制,即随着终端数量的增加,包含在与该号码对应的帧类型的帧中的控制信息量减少。 因此,根据用户数量,控制信息数据量减少,并且可以发送短帧。 即使用户数量增加,也可以减少RACH中的帧冲突的可能性,从而提高吞吐量。