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    • 10. 发明授权
    • Method and apparatus for estimating a signal sequence in a MIMO-OFDM mobile communication system
    • 用于估计MIMO-OFDM移动通信系统中的信号序列的方法和装置
    • US07333549B2
    • 2008-02-19
    • US10756073
    • 2004-01-12
    • Jong-Ho LeeJae-Hak ChungChan-Soo HwangSeung-Hoon NamDo-Young KwakJae-Choong HanSeong-Cheol Kim
    • Jong-Ho LeeJae-Hak ChungChan-Soo HwangSeung-Hoon NamDo-Young KwakJae-Choong HanSeong-Cheol Kim
    • H04L27/28
    • H04L25/0236H04L1/0618H04L25/0212H04L27/2649
    • A apparatus and method for estimating a sequence of transmitted quadrature amplitude modulation (QAM)-modulated signals and space-time block coded signals using an optimal expectation-maximization (EM)-based iterative estimation algorithm in a multiple-input and multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) mobile communication system. An initial sequence estimation value is produced on the basis of a predetermined initial value using a pilot sub-carrier contained in each of OFDM signals received by a receiving side. A normalized value of a received signal on a channel-by-channel basis is produced by a predetermined equation using orthogonality between the OFDM signals received by the receiving side. At least one subsequent sequence estimation value is produced using the initial sequence estimation value and the normalized value of the received signal on the channel-by-channel basis. If the subsequent sequence estimation value converges to a constant value after an operation of producing the subsequent sequence estimation value is iterated the predetermined number of times, the converged subsequent sequence estimation value is designated as a final sequence estimation value.
    • 一种用于在多输入和多输出中使用最佳期望最大化(EM)的迭代估计算法来估计发送的正交幅度调制(QAM)调制信号和时空块编码信号的序列的装置和方法 MIMO) - 正交频分复用(OFDM)移动通信系统。 使用包含在由接收侧接收的每个OFDM信号中的导频子载波,基于预定初始值产生初始序列估计值。 通过使用由接收侧接收的OFDM信号之间的正交性的预定方程式,在逐个信道的基础上产生接收信号的归一化值。 使用初始序列估计值和逐个信道的接收信号的归一化值来产生至少一个后续序列估计值。 如果后续序列估计值在产生后续序列估计值的操作被迭代预定次数之后收敛到常数值,则将收敛后续序列估计值指定为最终序列估计值。