Repetitive transmissions in multi-carrier based wireless access techniques
    1.
    发明授权
    Repetitive transmissions in multi-carrier based wireless access techniques 有权
    基于多载波的无线接入技术中的重复传输

    公开(公告)号:US08359510B2

    公开(公告)日:2013-01-22

    申请号:US13401831

    申请日:2012-02-21

    IPC分类号: H04L1/18 H04L1/02 H04B7/02

    摘要: According to one embodiment, a method for repetitive transmission using a plurality of sub-carriers includes: preparing a symbol to be transmitted using the plurality of sub-carriers within a single time domain unit; repeating the symbol a predetermined number (N) of times; applying a corresponding one of N different cyclic shift values to each of the N repeated symbols to be transmitted using the plurality of sub-carriers within the single time domain unit; performing an IFFT (Inverse Fast Fourier Transform) on each of the N repeated symbols to which the corresponding one of the N different cyclic shift values is applied; and transmitting the N repeated symbols on which the IFFT is performed using the plurality of sub-carriers.

    摘要翻译: 根据一个实施例,使用多个子载波的重复传输方法包括:在单个时域单元内准备要使用多个子载波进行传输的符号; 重复该符号预定次数(N)次; 对所述N个重复符号中的每一个应用N个不同循环移位值中的相应一个,使用所述单个时域单元内的所述多个子载波进行发送; 对应用N个不同循环移位值中的相应一个的N个重复符号中的每一个执行IFFT(快速傅里叶逆变换) 以及使用所述多个子载波来发送在其上执行所述IFFT的所述N个重复符号。

    METHOD AND APPARATUS FOR TRANSMITTING A PILOT IN MULTI-ANTENNA SYSTEM
    10.
    发明申请
    METHOD AND APPARATUS FOR TRANSMITTING A PILOT IN MULTI-ANTENNA SYSTEM 有权
    用于发射多天线系统中的导弹的方法和装置

    公开(公告)号:US20090232239A1

    公开(公告)日:2009-09-17

    申请号:US12403298

    申请日:2009-03-12

    IPC分类号: H04L27/28 H04L27/00

    摘要: A method of transmitting a pilot method in a multi-antenna system is provided. The method comprises generating a preceding matrix including a preceding vector, the preceding vector being applied to each of data streams to be transmitted, performing preceding procedure for a pilot by using the preceding matrix, and transmitting the precoded pilot, wherein transmission power of the precoded pilot is determined specifically to the each of the data streams. The transmission power of a precoded pilot can be controlled adaptively, individually and independently for each channel to improve channel estimation performance.

    摘要翻译: 提供了一种在多天线系统中发送导频方法的方法。 该方法包括:生成包括先前向量的前一矩阵,将前一向量应用于要发送的每个数据流,通过使用先前矩阵对导频执行先前过程,并发送预编码导频,其中预编码的发射功率 专门针对每个数据流确定导频。 预编码导频的发射功率可以针对每个信道进行单独和独立的自适应控制,以改善信道估计性能。