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    • 87. 发明申请
    • Communication Device
    • 通讯设备
    • US20080080628A1
    • 2008-04-03
    • US11795309
    • 2006-01-16
    • Shimpei ToYasuhiro HamaguchiHideo NanbaSeiichi SampeiHiroshi HaradaMasafumi Moriyama
    • Shimpei ToYasuhiro HamaguchiHideo NanbaSeiichi SampeiHiroshi HaradaMasafumi Moriyama
    • H04L27/28
    • H04L27/2602H04B7/061H04B7/084H04J13/18H04L5/0023H04L5/0044H04L5/0094H04L25/0204H04L25/0224H04L27/261H04L27/2647
    • Improving the accuracy of estimation of channel responses in receiving signals from a plurality of antennas is disclosed. A transmitting device of a base station includes a preamble A generating unit 010, a preamble B generating unit 011, phase rotating units 012 and 013, multiplexing units 014 and 015, an forward error correction coding unit 016, an S/P converting unit 017, a mapping unit 018, a changeover switch 019, IDFT (or IFFT) units 020 and 026, P/S converting units 021 and 027, GI (Guard Interval) inserting units 022 and 028, D/A converting units 023 and 029, radio transmitting units 024 and 030 and antenna units 025 and 031. In the preamble A generating unit 010 and the preamble B generating unit 011, a preamble A and a preamble B (see the packet format in FIG. 1) are generated, respectively. The preamble A is outputted to the multiplexing units 014 and 015, while the preamble B is outputted to the phase rotating units 012 and 013. The phase rotating units 012 and 013 to which the preamble B has been inputted give continuous phase rotation to subcarriers of the preamble B. In the transmitting device of the base station according to this embodiment, the phase rotating unit 012 does not give phase rotation, but only the phase rotating unit 013 gives phase rotation to the preamble B.
    • 公开了在从多个天线接收信号时提高信道响应的估计精度。 基站的发送装置包括前导码A生成部010,前导码B生成部011,相位旋转部012,003,复用部014,015,前向纠错编码部016,S / P转换部017 ,映射单元018,转换开关019,IDFT(或IFFT)单元020和026,P / S转换单元021和027,GI(保护间隔)插入单元022和028,D / A转换单元023和029, 无线发射单元024和030以及天线单元025和031。 在前导码A生成单元010和前导码B生成单元011中,分别生成前导码A和前导码B(参照图1中的分组格式)。 前导码A被输出到多路复用单元014和015,而前同步码B被输出到相位旋转单元012和013。 已经输入前同步码B的相位旋转单元012和013对前同步码B的副载波进行连续相位旋转。在根据本实施例的基站的发送装置中,相位旋转单元012不给予相位旋转, 但只有相位旋转单元013给予前导码B相位旋转。
    • 88. 发明授权
    • Communicating system, communicating method, and base station
    • 通信系统,通信方式和基站
    • US07339919B2
    • 2008-03-04
    • US11074546
    • 2005-03-07
    • Hiroshi Harada
    • Hiroshi Harada
    • H04B7/212H04L12/413
    • H04W72/1263H04W72/1242
    • A communication system, a communicating method and a base station are provided. When a base station generates an FCM, the base station detects the use rate of a transmission buffer and decides how slots of a frame of an uplink channel are structured. When the use rate of the transmission buffer is high, the base station designates the number of ACTSs to 0 so that the base station does not accept registration requests and so forth from mobile stations. When the use rate of the transmission buffer is low, the base station designates the number of ACTSs to 1. When the number of mobile stations is large as in a large convention hall, the base station generates TDMA frames each of which has only ACTSs. The base station can decide the number of ATCSs corresponding to the probability of which registration requests and so forth from mobile stations collide.
    • 提供通信系统,通信方法和基站。 当基站生成FCM时,基站检测发送缓冲器的使用率,并且确定上行链路信道的帧的时隙如何被构造。 当发送缓冲器的使用率高时,基站将ACTS的数量指定为0,使得基站不接收来自移动台的注册请求等。 当发送缓冲器的使用率低时,基站将ACTS的数量指定为1.当大型会议厅中的移动站的数量较多时,基站产生每个仅具有ACTS的TDMA帧。 基站可以根据来自移动台的注册请求等的概率对应的ATCS的数量来决定。