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92. 发明公开

KR1020040056473A 다중반송파 코드분할 다중접속에서의 스크램블링 시스템및 방법, 그 프로그램이 저장된 기록매체 有权
标题翻译：多载波CDMA和记录媒体存储程序中的屏蔽系统和方法
公开(公告)号：KR1020040056473A
公开(公告)日：2004-07-01
申请号：KR1020020082858
申请日：2002-12-23
申请人： 한국전자통신연구원 , 브이케이 주식회사
发明人： 최권휴 , 강군석 , 김수영 , 오덕길
IPC分类号： H04J13/10
CPC分类号： H04L27/2621 , H04B1/707 , H04B2201/70706 , H04L5/0021 , H04L25/03866 , H04L27/2602
摘要： PURPOSE: A scrambling system and method in a multi-carrier CDMA and a recording medium storing its program are provided to reduce a PARR(Peak-to-Average Power Ratio) by changing a scrambling code according to user's combination of orthogonal codes. CONSTITUTION: A symbol modulator modulates a bit sequence of the kth user into symbols(S1), and a multiplier multiplies each modulated symbols to an orthogonal code to spread it to a chip sequence(S2). An adder adds the spread chip sequences in synchronization with a symbol timing, and an interleaver performs interleaving on chip sequences of M number of symbols to be transmitted and aligns chips making the same symbols at M-chip intervals(S3). A serial/parallel converter converts the aligned chip sequences into a parallel chip signal having the number of sub-carriers(S4), and a scrambling chip vector generator and a multiplier multiply the parallel chip signal to a scrambling code and transmit it to an inverse Fourier converter(S5). The inverse Fourier converter, the parallel/serial converter and a guard time inserting unit modulate one chip of each sub-carrier to generate a multi-carrier signal, and output it(S6).
摘要翻译：目的：提供多载波CDMA和存储其程序的记录介质中的加扰系统和方法，以通过根据用户的正交码组合改变扰码来降低PARR（峰值平均功率比）。构成：符号调制器将第k个用户的比特序列调制成符号（S1），并且乘法器将每个调制符号乘以正交码以将其扩展到码片序列（S2）。加法器将码片序列与符号定时同步地相加，并且交织器对要发送的M个码元的码片序列执行交织，并且以M码片间隔对准使相同符号的码片（S3）。串行/并行转换器将对准的码片序列转换成具有子载波数的并行码片信号（S4），并且加扰码片矢量发生器和乘法器将并行码片信号乘以扰码并将其发送到反相傅里叶变换器（S5）。逆傅立叶变换器，并行/串行转换器和保护时间插入单元调制每个子载波的一个芯片以产生多载波信号并输出（S6）。

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