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    • 12. 发明授权
    • Multicarrier communication apparatus, multicarrier communication system, and transmission power control method
    • 多载波通信装置,多载波通信系统和发射功率控制方法
    • US08014454B2
    • 2011-09-06
    • US10568450
    • 2004-08-16
    • Isamu Yoshii
    • Isamu Yoshii
    • H04K1/10
    • H04W52/346H04L27/2614H04L27/2626
    • A multicarrier communication apparatus capable of reducing an amount of information required for feedback, making a range of transmission power fluctuation small, and achieving rapid convergence on a target transmission power is disclosed. With this apparatus, subcarrier pair determination section (1142) puts a plurality of subcarriers contained in a multicarrier signal into pairs, notifies combining section (106) of information pertaining to the pairs of subcarriers, combines received power of each pair of subcarriers, and outputs combined received power obtained in this manner to command producing section (1146). Target power storage section (1144) stores target power for received power in such a manner that SIR at the subject apparatus becomes a desired SIR. Command producing section (1146) compares combined received power for the pairs of subcarriers and target received power, produces a command indicating a difference in power between these two received powers, and generates a control signal containing the produced command.
    • 公开了一种多载波通信装置,其能够减少反馈所需的信息量,使发送功率波动范围变小,并实现目标发送功率的快速收敛。 使用该装置,子载波对确定部(1142)将包含在多载波信号中的多个副载波成对地通知合成部(106),关于副载波对的信息,合成每对副载波的接收功率,以及输出 以这种方式获得的组合接收功率到命令产生部分(1146)。 目标电力存储部(1144)以将被摄体装置的SIR成为期望SIR的方式存储接收功率的目标功率。 命令产生部分(1146)比较副载波对和组合接收功率的组合接收功率,产生指示这两个接收功率之间的功率差的命令,并产生包含所产生的命令的控制信号。
    • 13. 发明申请
    • WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD
    • 无线通信设备和无线通信方法
    • US20110161772A1
    • 2011-06-30
    • US13060634
    • 2009-09-01
    • Isamu YoshiiKenichi KuriTakaaki Kishigami
    • Isamu YoshiiKenichi KuriTakaaki Kishigami
    • H03M13/05G06F11/10
    • H03M13/1102H03M13/255H03M13/6306H04L1/0057H04L1/1819H04L1/1893
    • Disclosed is a wireless communication device capable of always obtaining the optimum error rate characteristic and of keeping the number of retransmissions to a minimum for IR-based HARQ which uses LDPC encoding in the error correction encoding. With the device, an RV control unit (102) controls the system check bit transmission sequence such that all of the system check bits included in an LDPC code word are transmitted with the first transmission in sequence from the smallest column weight of a check matrix, and controls the transmission sequence of multiple RVs such that multiple RVs comprising only system check bits are transmitted in sequence from the smallest column weight when an RV is transmitted additionally after all of the parity bits included in an LDPC code word have been transmitted. In addition, a modulation unit (103) maps a symbol, composed of system check bits belonging to each of the multiple RVs and the transmission sequences of which are controlled by the RV control unit (102), to a signal point which differs from the signal point to which was mapped a symbol composed of the system check bits transmitted with the first transmission.
    • 公开了一种无线通信设备,其能够始终将纠错编码中使用LDPC编码的基于IR的HARQ获得最佳误码率特性并将重发次数保持在最小。 利用该装置,RV控制单元(102)控制系统校验位传输序列,使得包括在LDPC码字中的所有系统校验位按照从校验矩阵的最小列权重开始的第一次传输, 并且控制多个RV的发送序列,使得仅在发送了包括在LDPC码字中的所有奇偶校验位之后,另外发送RV时,从最小列权重开始,依次发送仅包括系统校验位的多个RV。 此外,调制单元(103)将属于多个RV中的每一个的系统校验位和由RV控制单元(102)控制的发送序列组成的符号映射到不同于 信号点被映射到由第一传输发送的系统校验位组成的符号。
    • 17. 发明申请
    • WIRELESS COMMUNICATION METHOD, COMMUNICATION TERMINAL APPARATUS, AND WIRELESS COMMUNICATION SYSTEM
    • 无线通信方法,通信终端设备和无线通信系统
    • US20090252092A1
    • 2009-10-08
    • US11721780
    • 2005-12-15
    • Isamu Yoshii
    • Isamu Yoshii
    • H04W4/00H04L27/28H04J11/00
    • H04L5/0048H04B2201/70701H04J13/18H04L5/0007H04L5/0044H04L5/1438H04W48/20
    • A communication terminal apparatus and the like wherein even under an environment that the propagation path characteristic is different for each of frequency bands of OFDM signals, the error rates of all the frequency bands are reduced to improve the communication rate. In this apparatus, a connection destination deciding part (221) compares the correlation values of the respective sub-bands for cells (A-D) received from correlation value calculating parts (213-1,213-2,213-3) to determine a sub-band ID that exhibits the highest correlation value in each sub-band. Then, a base station apparatus (100) corresponding to the determined sub-band ID is decided as a connection destination in that sub-band, and the thus decided base station apparatus (100) for each sub-band is notified to an access request signal generating part (222) and to a received data generating part (231).
    • 一种通信终端装置等,其中即使在OFDM信号的频带中的传播路径特性不同的环境下,也减少了所有频带的错误率,以提高通信速率。 在该装置中,连接目的地决定部221比较从相关值计算部(213-1,213-2,213-3)接收到的小区(AD)的各子带的相关值,以确定子带ID, 在每个子带中表现出最高的相关值。 然后,将与所确定的子带ID相对应的基站装置(100)确定为该子带中的连接目的地,并将每个子带的所决定的基站装置(100)通知接入请求 信号产生部分(222)和接收数据产生部分(231)。
    • 20. 发明申请
    • RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD
    • 无线电通信基站装置和无线电通信方法
    • US20090059854A1
    • 2009-03-05
    • US12160197
    • 2007-01-12
    • Akihiko NishioIsamu YoshiiHidetoshi Suzuki
    • Akihiko NishioIsamu YoshiiHidetoshi Suzuki
    • H04W28/00
    • H04W24/10H04J11/0069H04L5/0023H04L5/0053
    • Provided is a base station capable of searching cells of different frequencies without losing a chance of data communication by effectively performing SCH data communication. The base station (100) includes: an encoding unit (101) for encoding SCH data; a modulation unit (102) for modulating the encoded SCH data; encoding units (103-1 to 103-N) for encoding user data (#1 to #N), modulation units (104-1 to 104-N) for modulating the encoded user data (#1 to #N); a frame format setting unit (105) for setting a frame format of each frame; and an IFFT unit (106) for mapping the SCH data and the user data (#1 to #N) to sub carriers (#1 to #K) and performing IFFT to generate an OFDM symbol. The frame format setting unit (105) changes the data communication sub frame for each frame so as to change the position of the data communication section within a frame for each frame.
    • 提供了一种能够通过有效地进行SCH数据通信而不失去数据通信的机会来搜索不同频率的小区的基站。 基站(100)包括:编码单元(101),用于对SCH数据进行编码; 调制单元(102),用于调制编码的SCH数据; 用于编码用户数据(#1至#N)的编码单元(103-1至103-N),用于调制编码用户数据(#1至#N)的调制单元(104-1至104-N) 帧格式设置单元,用于设置每帧的帧格式; 以及用于将SCH数据和用户数据(#1至#N)映射到子载波(#1至#K)并执行IFFT以生成OFDM符号的IFFT单元(106)。 帧格式设置单元(105)改变每帧的数据通信子帧,以便在每帧的帧内改变数据通信部分的位置。