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    • 73. 发明申请
    • METHOD OF TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中发送信道状态信息的方法
    • US20100254335A1
    • 2010-10-07
    • US12753475
    • 2010-04-02
    • Ja Ho KooHyun Soo KoBin Chul IhmWook Bong Lee
    • Ja Ho KooHyun Soo KoBin Chul IhmWook Bong Lee
    • H04W72/04
    • H04W48/08H04W28/04H04W72/042
    • A method of transmitting channel state information from a user equipment in a wireless communication system is disclosed. In order to report the channel state information, the user equipment is able to additionally transmit noise plus interference variance information as well as spatial channel matrix or spatial channel covariance matrix. The spatial channel matrix or spatial channel covariance matrix and the noise plus interference variance information can include information on a prescribed number of subbands in best channel states and can include information on a wideband including a plurality of subbands. Moreover, the user equipment is able to transmit normalized spatial channel matrix or spatial channel covariance matrix and normalized noise plus interference variance information for accurate and efficient transmission of the channel state information.
    • 公开了一种从无线通信系统中的用户设备发送信道状态信息的方法。 为了报告信道状态信息,用户设备能够附加地发送噪声加干扰方差信息以及空间信道矩阵或空间信道协方差矩阵。 空间信道矩阵或空间信道协方差矩阵和噪声加干扰方差信息可以包括关于最佳信道状态的规定数量的子带的信息,并且可以包括关于包括多个子带的宽带的信息。 此外,用户设备能够发送归一化空间信道矩阵或空间信道协方差矩阵和归一化噪声加干扰方差信息,以准确和有效地传输信道状态信息。
    • 75. 发明授权
    • Feedback scheme for multi-cell interference mitigation consideration legacy mobile users
    • 用于多小区干扰减轻考虑的传统移动用户的反馈方案
    • US08699610B2
    • 2014-04-15
    • US13388019
    • 2010-02-17
    • Jian XuJa Ho KooBin Chul IhmWook Bong Lee
    • Jian XuJa Ho KooBin Chul IhmWook Bong Lee
    • H04B7/02
    • H04B7/0617H04B7/063
    • The present invention relates to a Multi-Input Multi-Output (MIMO) communication system and more particularly, to a method for precoding matrix index (PMI) restriction/recommendation in a multi-cell wireless communication system. A method of codebook based precoding matrix index (PMI) feedback considering legacy mobile stations in a multi-cell wireless communication system comprises measuring a channel from at least one neighboring base station generating interference with a signal received from a serving base station; determining a first PMI in which the interference is maximized from PMIs included in a first codebook, wherein the first PMI is determined based on the measured channel; determining a first PMI group including PMIs having high correlation to the first PMI from the PMIs included in the first codebook; determining a second PMI in which the interference is maximized from PMIs included in a second codebook, where in the second codebook is for the legacy mobile stations; determining a second PMI group including PMIs having high correlation to the second PMI from the PMIs included in the second codebook; and transmitting feedback information including the first PMI, a first subset bit indicating the first PMI group, the second PMI and a second subset bit indicating the second PMI group to the serving base station.
    • 多输入多输出(MIMO)通信系统技术领域本发明涉及多输入多输出(MIMO)通信系统,更具体地说,涉及在多小区无线通信系统中对矩阵索引(PMI)限制/推荐进行预编码的方法。 一种考虑多小区无线通信系统中的传统移动台的基于码本的预编码矩阵索引(PMI)反馈的方法包括测量来自至少一个相邻基站的信道,产生对从服务基站接收的信号的干扰; 从包括在第一码本中的PMI确定其中所述干扰最大化的第一PMI,其中,基于所测量的信道确定所述第一PMI; 从包括在第一码本中的PMI确定包括与第一PMI具有高相关性的PMI的第一PMI组; 从包括在第二码本中的PMI确定其中所述干扰最大化的第二PMI,其中在所述第二码本中用于所述传统移动站; 从包括在第二码本中的PMI确定包括与第二PMI相关性高的PMI的第二PMI组; 以及向所述服务基站发送包括所述第一PMI,指示所述第一PMI组的第一子集比特,所述第二PMI和指示所述第二PMI组的第二子比特的反馈信息。