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    • 4. 发明授权
    • Method for generating complex quasi-orthogonal code and apparatus and method for spreading channel data using the quasi-orthogonal code in CDMA communication system
    • 用于生成复合准正交码的方法,以及用于在CDMA通信系统中使用准正交码扩展信道数据的装置和方法
    • US06671251B1
    • 2003-12-30
    • US09480963
    • 2000-01-11
    • Young-Ky KimKyeong-Cheol YangJae-Min AhnJae-Yoel KimHee-Won KangSeung-Joo Maeng
    • Young-Ky KimKyeong-Cheol YangJae-Min AhnJae-Yoel KimHee-Won KangSeung-Joo Maeng
    • H04J1100
    • H04J13/0048H04J13/0025H04J13/102
    • A method for generating a complex quasi-orthogonal code for channel spreading in a CDMA communication system is disclosed. The method comprises generating an M-sequence having a length N and a specific sequence having a good full correlation property with the M-sequence; generating a predetermined number of other specific sequences by circularly shifting said specific sequence; generating a predetermined number of other M-sequences by circularly shifting said M-sequence, and column permutating the circularly shifted specific sequences in a same method as a column permutation method for converting the generated M-sequences to Walsh orthogonal codes to generate candidate masks; generating quasi-orthogonal code representatives by operating the candidate masks and the Walsh orthogonal codes having the same length as the mask candidates; and selecting quasi-orthogonal code candidates satisfying a partial correlation between the Walsh orthogonal codes out of the generated quasi-orthogonal code representatives and a partial correlation between different quasi-orthogonal codes, and selecting masks pertinent to generating the selected quasi-orthogonal codes.
    • 公开了一种用于在CDMA通信系统中生成用于信道扩展的复合准正交码的方法。 该方法包括产生具有长度N的M序列和与M序列具有良好全相关特性的特定序列; 通过循环移位所述特定序列产生预定数量的其他特定序列; 通过循环移位所述M序列来产生预定数量的其他M序列,并且以与用于将所生成的M序列转换为沃尔什正交码的列置换方法相同的方法对列进行排列,以生成候选掩模; 通过操作候选掩码和与掩码候选具有相同长度的沃尔什正交码来产生准正交码表示; 以及选择满足所生成的准正交码表示中的沃尔什正交码之间的部分相关性的准正交码候选和不同准正交码之间的部分相关性,以及选择与生成选择的准正交码相关的掩码。
    • 8. 发明授权
    • Device and method for generating quasi-orthogonal code and spreading channel signals in mobile communication system
    • 用于在移动通信系统中产生准正交码和扩展信道信号的装置和方法
    • US06731674B1
    • 2004-05-04
    • US09405333
    • 1999-09-24
    • Kyeong-Cheol YangJae-Yoel KimHee-Won KangYoung-Ky Kim
    • Kyeong-Cheol YangJae-Yoel KimHee-Won KangYoung-Ky Kim
    • H04B1500
    • H04J13/10H04J13/0048
    • A device and method for generating a binary quasi-orthogonal code in a CDMA communication system. The method comprises generating an m-sequence, and specific left and right sequences having a good full correlation property with the m-sequence; column permuting the specific left and right sequences in a column permutation method used when converting the m-sequence to a Walsh orthogonal code, and connecting the left sequences to the right sequences to generate mask candidates; operating the mask candidates and Walsh orthogonal codes having the same length as the mask candidates to generate quasi-orthogonal code candidate families; and selecting a quasi-orthogonal code out of the generated quasi-orthogonal code candidate families, the selected quasi-orthogonal code satisfying a partial correlation property with the Walsh orthogonal codes, and selecting a mask related to generation of the selected quasi-orthogonal code.
    • 一种用于在CDMA通信系统中产生二进制准正交码的装置和方法。 该方法包括生成m序列,以及具有与m序列具有良好全相关特性的特定左和右序列; 列将在将m序列转换为沃尔什正交码时使用的列置换方法中的特定左右序列进行排列,并将左序列连接到右序列以生成掩码候选; 操作具有与掩码候选相同长度的掩码候选和沃尔什正交码,以产生准正交代码候选族; 以及从所生成的准正交码候选族中选择准正交码,所选择的准正交码与沃尔什正交码满足部分相关性,并选择与选择的准正交码的生成相关的掩模。
    • 10. 发明授权
    • Channel spreading device and method in CDMA communication system
    • CDMA通信系统中的信道扩频装置及方法
    • US06707788B1
    • 2004-03-16
    • US09456731
    • 1999-12-08
    • Jae-Yoel KimHee-Won KangSeung-Joo MaengYoung-Ky Kim
    • Jae-Yoel KimHee-Won KangSeung-Joo MaengYoung-Ky Kim
    • H04B1500
    • H04J13/00H04B1/707H04J13/0022H04J13/10
    • A demodulation method in a mobile station having a plurality of channels, for receiving a signal from a base station. In one aspect, the base station has a plurality of channels, a BPSK spreader for orthogonally spreading symbol data of each channel with an assigned orthogonal code, and a QPSK spreader for PN-spreading the orthogonally spread signal with a PN code. In the demodulation method, a first QPSK despreader in the mobile station receives PN-spread signal and PN-despreads the PN-spread signal with the PN code, and a second QPSK despreader orthogonally despreads the PN-despread signal with a complex orthogonal code having the real and imaginary parts of the assigned orthogonal code. In another aspect, the base station has a plurality of channels, a QPSK spreader for spreading symbol data of each channel by the real and imaginary parts of its assigned orthogonal code, and a QPSK spreader for PN-spreading the orthogonally spread signal with a PN code. In the demodulation method, a mobile station receives the PN-spread signal from the base station, PN-despreads the received signal with a PN code by a QPSK despreader, and orthogonally despreads the PN-despread signal with the assigned orthogonal code by a BPSK despreader. In both aspects, during the orthogonal despreading, the complex conjugate of the estimated pilot channel value is multiplied by the orthogonally despread signal, for compensation.
    • 一种具有多个信道的移动站中的解调方法,用于从基站接收信号。 一方面,基站具有多个信道,用于以分配的正交码正交扩展每个信道的符号数据的BPSK扩展器,以及用PN码对正交扩展信号进行PN扩展的QPSK扩展器。 在解调方法中,移动站中的第一QPSK去扩频器接收PN扩展信号,并用PN码对PN扩展信号进行PN解扩,第二QPSK去扩频器以具有复数正交码的PN解扩信号正交解扩, 分配的正交码的实部和虚部。 另一方面,基站具有多个信道,QPSK扩展器,用于通过其分配的正交码的实部和虚部扩展每个信道的符号数据;以及QPSK扩展器,用于PN扩频,具有PN的正交扩展信号 码。 在解调方法中,移动台从基站接收PN扩展信号,用QPSK去扩频器对PN码进行PN解扩,并通过BPSK对所分配的正交码对PN解扩信号进行正交解扩 解散器 在两个方面,在正交解扩过程中,将估计的导频信道值的复共轭乘以正交解扩信号以进行补偿。