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57 条记录 (耗时 0.076 秒)

    PRECODING METHOD, AND TRANSMITTING DEVICE
    51.
    发明申请
    PRECODING METHOD, AND TRANSMITTING DEVICE 有权
    预测方法和发送设备

    公开(公告)号：US20130121438A1

    公开(公告)日：2013-05-16

    申请号：US13810783

    申请日：2011-12-01

    申请人： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

    发明人： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

    IPC分类号： H04B7/04

    CPC分类号： H04B7/0456 ,  H04B7/0469 ,  H04B7/06 ,  H04B7/0606 ,  H04B7/0689 ,  H04L25/03898

    摘要： Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.

    摘要翻译： 公开了一种用于同时发送相同频率的第一调制信号和第二调制信号的传输方案。 根据传输方案，预编码权重乘法单元在第一映射之后将预编码权重乘以基带信号和在第二映射之后将基带信号相乘，并输出第一调制信号和第二调制信号。 在预编码权重乘法单元中，规则地跳跃预编码权重。

    PILOT PATTERNS FOR OFDM SYSTEMS WITH MULTIPLE ANTENNAS
    55.
    发明申请
    PILOT PATTERNS FOR OFDM SYSTEMS WITH MULTIPLE ANTENNAS 有权
    具有多个天线的OFDM系统的引导模式

    公开(公告)号：US20110317785A1

    公开(公告)日：2011-12-29

    申请号：US13255388

    申请日：2011-01-13

    申请人： Mihail Petrov ,  Tomohiro Kimura ,  Mikihiro Ouchi

    发明人： Mihail Petrov ,  Tomohiro Kimura ,  Mikihiro Ouchi

    IPC分类号： H04B7/02 ,  H04L27/06 ,  H04L27/04

    CPC分类号： H04L5/0048 ,  H04B7/02 ,  H04B7/0613 ,  H04L25/0224 ,  H04L27/2611 ,  H04L27/2613 ,  H04L27/2627 ,  H04L27/2649

    摘要： The present invention relates to orthogonal frequency-division multiplexing (OFDM) communication systems with multiple transmit antennas receive antennas, and in particular to methods for inserting scattered pilots (SPs) into the transmit signals of such OFDM systems, for estimating channel properties on the basis of the scattered pilots, a multi-antenna OFDM transmitter, and an OFDM receiver. In this context, it is the particular approach of the present invention to keep the same SP pattern like in the single-transmitter case, to partition the pilots into as many subsets as there are transmitters (transmit antennas), and to interleave these subsets both in time and in frequency. In this manner, the granularity of pilots of the same subset is reduced. This offers increased flexibility in designing the scattered pilot patterns and greater accuracy of the estimated channel properties.

    摘要翻译： 本发明涉及具有多个发射天线的正交频分复用（OFDM）通信系统接收天线，特别涉及用于将散射导频（SP）插入到这种OFDM系统的发射信号中的方法，用于基于 的分散导频，多天线OFDM发射机和OFDM接收机。 在这种情况下，本发明的特定方法是在单发射机情况下保持相同的SP模式，以将导频划分成与发射机（发射天线）一样多的子集，并且将这些子集两者交织 在时间和频率上。 以这种方式，减少了相同子集的导频的粒度。 这提供了设计分散导频模式和估计信道特性的更高精度的更大灵活性。

    OFDM TRANSMITTER DEVICE, OFDM TRANSMISSION METHOD, OFDM RECEIVER DEVICE, AND OFDM RECEPTION METHOD
    56.
    发明申请
    OFDM TRANSMITTER DEVICE, OFDM TRANSMISSION METHOD, OFDM RECEIVER DEVICE, AND OFDM RECEPTION METHOD 有权
    OFDM发射机设备，OFDM传输方法，OFDM接收机设备和OFDM接收方法

    公开(公告)号：US20110317682A1

    公开(公告)日：2011-12-29

    申请号：US13254954

    申请日：2010-12-13

    申请人： Yoshinobu Matsumura ,  Tomohiro Kimura ,  Mikihiro Ouchi

    发明人： Yoshinobu Matsumura ,  Tomohiro Kimura ,  Mikihiro Ouchi

    IPC分类号： H04L27/04

    CPC分类号： H04L27/2647 ,  H04L5/0048 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2649 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2698

    摘要： An OFDM transmitter and an OFDM receiver respectively transmit and receive N (N≧2, N is an integer) control symbols. For each control symbol, a guard interval time-domain signal is, for example, identical to a signal obtained by frequency-shifting at least a portion of a useful symbol time-domain signal by an amount different from any other symbol, or to a signal obtained by frequency-shifting one or both of a portion and a span of a useful symbol interval time-domain signal different from any other symbol by a predetermined amount.

    摘要翻译： OFDM发射机和OFDM接收机分别发送和接收N（N≥2，N是整数）控制符号。 对于每个控制符号，保护间隔时域信号例如与通过将有用符号时域信号的至少一部分频移到不同于任何其它符号的量而获得的信号相同，或者与 通过将与任何其他符号不同的有用符号间隔时域信号的一部分和跨度中的一个或两个频移位预定量而获得的信号。

    OFDM RECEIVING APPARATUS, OFDM RECEIVING METHOD, OFDM RECEIVING CIRCUIT, INTEGRATED CIRCUIT, AND PROGRAM
    57.
    发明申请
    OFDM RECEIVING APPARATUS, OFDM RECEIVING METHOD, OFDM RECEIVING CIRCUIT, INTEGRATED CIRCUIT, AND PROGRAM 有权
    OFDM接收设备，OFDM接收方法，OFDM接收电路，集成电路和程序

    公开(公告)号：US20100128822A1

    公开(公告)日：2010-05-27

    申请号：US12593127

    申请日：2008-03-25

    申请人： Mikihiro Ouchi ,  Kenichiro Hayashi ,  Tomohiro Kimura

    发明人： Mikihiro Ouchi ,  Kenichiro Hayashi ,  Tomohiro Kimura

    IPC分类号： H04L27/00

    CPC分类号： H04L27/2657 ,  H04L25/0232 ,  H04L27/2662 ,  H04L27/2665

    摘要： A synchronization section 101 specifies a position of a guard interval correlation's center of gravity based on a guard interval correlation value, and calculates a carrier-direction shift amount Fshift. An equalization section 102 shifts the passband of a carrier interpolation filter of a carrier interpolation section 111 by the carrier-direction shift amount Fshift calculated by the synchronization section 101. This shift processing causes the delay profile to be kept in the center of the passband of the carrier interpolation filter, for any FFT window position. This enables transmission path estimation without limiting a range of an FFT window position even if the passband of the carrier interpolation filter is narrower than a guard interval of an OFDM signal.

    摘要翻译： 同步部101基于保护间隔相关值来指定保护间隔相关重心的位置，并计算载波方向偏移量Fshift。 均衡单元102将载波内插单元111的载波内插滤波器的通带移位由同步单元101计算出的载波方向移位量Fshift。该移位处理使延迟分布保持在通带的通带的中心 载波插值滤波器，用于任何FFT窗口位置。 即使载波内插滤波器的通带比OFDM信号的保护间隔窄，也能够限制FFT窗口位置的范围。