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    • 4. 发明授权
    • Spread spectrum signal generating device and method in transmitter of mobile communications system
    • 移动通信系统发射机中的扩频信号发生装置及方法
    • US06396868B1
    • 2002-05-28
    • US09135990
    • 1998-08-18
    • Soon-Young YoonJae-Min AhnHee-Won KangYoung-Ky KimJong-Seon NoHong-Yeop SongHa-Bong ChungJe-Woo Kim
    • Soon-Young YoonJae-Min AhnHee-Won KangYoung-Ky KimJong-Seon NoHong-Yeop SongHa-Bong ChungJe-Woo Kim
    • H04B1707
    • H04B1/707H04B2201/70706H04J13/004
    • There are provided spread spectrum signal generating devices and methods in a transmitter of a mobile communications system using a plurality of logical channels. In the spread spectrum signal generating devices, a multiplexer time multiplexes a pilot channel signal and a control channel signal which are output at substantially constant power levels. A first orthogonal encoder orthogonally spreads the output of the multiplexer with an orthogonal code. A second orthogonal encoder orthogonally spreads voice channel data of a variable bit rate with an orthogonal code. A third orthogonal encoder orthogonally spreads packet channel data of a variable bit rate with an orthogonal code. An IQ signal mapper adds the outputs of the first and third orthogonal encoders, outputs the added signal as a first channel signal, and outputs the output of the second orthogonal encoder as a second channel signal. A PN spreader spreads the first and second channel signals with PN codes and outputs a final spectrum spread signal, which exhibits a substantially minimized peak-to-average power ratio.
    • 在使用多个逻辑信道的移动通信系统的发射机中提供扩频信号产生装置和方法。 在扩展频谱信号发生装置中,多路复用器以基本上恒定的功率电平输出导频信道信号和控制信道信号。 第一正交编码器使用正交码对多路复用器的输出进行正交扩展。 第二正交编码器用正交码对可变比特率的语音信道数据进行正交扩频。 第三正交编码器使用正交码对可变比特率的分组信道数据进行正交扩展。 IQ信号映射器将第一和第三正交编码器的输出相加,输出相加的信号作为第一信道信号,并将第二正交编码器的输出作为第二信道信号输出。 PN扩展器用PN码扩展第一和第二信道信号,并输出最终的频谱扩展信号,其表现出基本上最小化的峰均功率比。
    • 5. 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。