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    • 84. 发明申请
    • METHOD AND APPARATUS FOR CONTROLLING NEIGHBOR CELL INTERFERENCE
    • 用于控制邻域细胞干扰的方法和装置
    • US20120202540A1
    • 2012-08-09
    • US13501646
    • 2010-10-12
    • Hee Soo LeeJae Young AhnNam Hoon Park
    • Hee Soo LeeJae Young AhnNam Hoon Park
    • H04B15/00H04W72/04
    • H04W72/082
    • A method for managing neighbor cell interference comprises: a step of measuring inter-cell interference control information by subframe units; and a step of transmitting the inter-cell interference control information measured by subframe units, to at least one neighbor cell for each of the subframes. The interference management method of the present invention dynamically performs neighbor cell interference management under the condition where neighbor cell interference changes in terms of time, thus improving performance of a system. Further, the interference management method of the present invention maps a wireless resource property pattern to a cell ID. Consequently, the system adopting the method of the present invention exhibits excellent performance in any environment.
    • 一种用于管理邻居小区干扰的方法包括:通过子帧单元测量小区间干扰控制信息的步骤; 以及将通过子帧单位测量的小区间干扰控制信息发送到每个子帧的至少一个相邻小区的步骤。 本发明的干扰管理方法在相邻小区干扰时间变化的情况下动态地执行相邻小区干扰管理,从而提高系统的性能。 此外,本发明的干扰管理方法将无线资源属性模式映射到小区ID。 因此,采用本发明方法的系统在任何环境中表现出优异的性能。
    • 85. 发明授权
    • Detector for multi-level modulated signal and detection method using the same, and iterative receiver for multi-level modulated signal and iteratively receiving method using the same
    • 用于多电平调制信号的检测器和使用其的检测方法,以及用于多电平调制信号的迭代接收机以及使用其的迭代接收方法
    • US08136022B2
    • 2012-03-13
    • US11920226
    • 2006-05-12
    • Byung-Jang JeongJae Young AhnJinho Choi
    • Byung-Jang JeongJae Young AhnJinho Choi
    • H03M13/03
    • H04B7/04
    • Provided are a detector for a multi-level modulated signal and a detection method using the same, and an iterative receiver for a multi-level modulated signal and an iteratively receiving method using the same. The detector includes: a channel estimator estimating a channel response of each of a plurality of bits included in at least one received signal based on multi-level modulation; a hard decision unit, for each bit, selecting at least one of a plurality of bits remaining by excluding the bit and performing a hard decision based on a pre-probability of the selected bit; and a reliability calculator calculating reliability of each of all the bits in the received signal based on the received signal from which the hard-decided bit component is cancelled and the estimated channel response. Accordingly, the computation amount according to detection can be reduced without the degradation of performance.
    • 提供了一种用于多电平调制信号的检测器和使用该检测方法的检测方法,以及用于多电平调制信号的迭代接收机和使用其的迭代接收方法。 检测器包括:信道估计器,用于基于多电平调制来估计包含在至少一个接收信号中的多个比特中的每一个的信道响应; 硬决策单元,对于每个位,通过排除所述比特来选择剩余的多个比特中的至少一个,并且基于所选择的比特的预先概率执行硬判决; 以及可靠性计算器,基于从硬判决位分量被取消的接收信号和所估计的信道响应,计算接收信号中的所有比特中的每一个的可靠性。 因此,可以降低根据检测的计算量,而不会降低性能。
    • 87. 发明授权
    • LDPC encoder and decoder and LDPC encoding and decoding methods
    • LDPC编码器和解码器以及LDPC编码和解码方法
    • US07882418B2
    • 2011-02-01
    • US11721162
    • 2005-12-07
    • Sang Hyun LeeJae Young Ahn
    • Sang Hyun LeeJae Young Ahn
    • H03M13/00
    • H03M13/1148H03M13/6505
    • Provided are an LDPC encoder and decoder, and LDPC encoding and decoding methods. The LDPC encoder includes: a code generating circuit that includes a memory storing a first parity check matrix and sums a first row which is at least one row of the first parity check matrix and a second row which is at least one of the remaining rows of the first parity check matrix to output a second parity check matrix; and an encoding circuit receiving the second parity check matrix and an information word to output an LDPC-encoded code word. Also the LDPC decoder includes: a code generating circuit including a memory which stores a first parity check matrix and summing a first row which is at least one row of the first parity check matrix and a second row which is at least one of the remaining rows of the first parity check matrix to output a second parity check matrix; and a decoding circuit receiving the second parity check matrix and a code word to output an LDPC-decoded information word.
    • 提供了一种LDPC编码器和解码器,以及LDPC编码和解码方法。 LDPC编码器包括:代码生成电路,其包括存储第一奇偶校验矩阵的存储器,并且对作为第一奇偶校验矩阵的至少一行的第一行和与作为第一奇偶校验矩阵的剩余行中的至少一行的第二行求和 所述第一奇偶校验矩阵输出第二奇偶校验矩阵; 以及接收第二奇偶校验矩阵的编码电路和输出LDPC编码码字的信息字。 此外,LDPC解码器包括:代码生成电路,包括存储器,存储第一奇偶校验矩阵并对作为第一奇偶校验矩阵的至少一行的第一行求和作为剩余行中的至少一个的第二行 的第一奇偶校验矩阵以输出第二奇偶校验矩阵; 以及接收第二奇偶校验矩阵的解码电路和输出LDPC解码信息字的码字。
    • 89. 发明申请
    • Method for selecting beams during initial synchronization process using switched beam, switched beam operation method and initial sychronization using the same
    • 在使用切换波束的初始同步处理期间选择波束的方法,切换波束操作方法和使用其的初始同步
    • US20090116565A1
    • 2009-05-07
    • US11914922
    • 2005-12-13
    • Jae Young AhnYong-Soo ChoHyun-Soo Ko
    • Jae Young AhnYong-Soo ChoHyun-Soo Ko
    • H04L27/28H04L7/00
    • H04B7/0491H04B7/0408H04B7/0617H04L5/023H04W16/10H04W16/24H04W16/28
    • A method for selecting beams, a switched beam operation method during an initial synchronization process, and an initial synchronization method using it are provided for selecting beams to minimize the probability of occurrence of interferences between cells by considering a distance between beams within neighboring sectors during an initial synchronization process using switched beams, in an orthogonal frequency division multiplexing (OFDM) cellular system employing a smart antenna. The inventive method comprises the steps of dividing each cell into sectors, and counting the number of fixed beams per cell, and selecting a switched beam for minimizing probability of interference, from fixed beams presenting in a corresponding sector, based on distances between a selected beam and beams of all of adjacent cells and the number of cases to be selected in a subsequent time slot, according to the counted number of the fixed beams existing in each sector.
    • 提供一种用于选择波束的方法,初始同步过程中的切换波束操作方法以及使用该方法的初始同步方法,用于选择波束以通过考虑在相邻扇区内的波束之间的距离来最小化小区之间干扰发生的概率 在使用智能天线的正交频分复用(OFDM)蜂窝系统中使用切换波束的初始同步过程。 本发明的方法包括以下步骤:将每个小区划分成扇区,并且对每个小区的固定波束数进行计数,并且根据所选择的波束之间的距离,选择用于最小化相应扇区中呈现的固定波束的干扰概率的切换波束 根据存在于每个扇区中的固定光束的数目,所有相邻小区的波束和后续时隙中的选择的个数。