公开(公告)号：KR101215932B1

公开(公告)日：2012-12-28

申请号：KR1020110039702

申请日：2011-04-27

Applicant: 서울대학교산학협력단

Inventor： 노종선 ,  신동준 ,  전현배 ,  조영전

IPC: H04L27/26

Abstract: 직교주파수분할다중화시스템의 PAPR 감소방법및 이를위한직교주파수분할다중화시스템통신장치가개시된다. 본발명의일실시예에따른직교주파수분할다중화시스템의 PAPR 감소방법은, OFDM 심볼시퀀스를둘 이상의서브블록들로파티션하는단계; 상기서브블록들각각에대응하는부가적맵핑심볼서브블록을생성하는단계; 상기서브블록들및 상기부가적맵핑심볼서브블록을역 고속푸리에변환하여신호서브시퀀스및 부가적맵핑신호서브시퀀스를생성하는단계; 상기신호서브시퀀스및 부가적맵핑신호서브시퀀스를이용하여후보신호시퀀스들을생성하는단계; 및상기후보신호시퀀스들중 최소 PAPR에상응하는후보신호시퀀스를선택하는단계를포함한다.

公开(公告)号：KR1020120121733A

公开(公告)日：2012-11-06

申请号：KR1020110039702

申请日：2011-04-27

Applicant: 서울대학교산학협력단

Inventor： 노종선 ,  신동준 ,  전현배 ,  조영전

IPC: H04L27/26

CPC classification number: H04L27/2614 ,  H04L27/2628

Abstract: PURPOSE: A method and apparatus for reducing a peak to average power ratio in an orthogonal frequency division multiplexing system using additional mapping sequences are provided to generate an alternative signal sequence by performs IFFT(inverse fast Fourier transform) of sub blocks and an additional mapping symbol sub block and then linearly coupling the sub blocks and the additional mapping symbol sub block in a time domain. CONSTITUTION: A sub block partition part(410) partitions an OFDM symbol sequence into two or more sub blocks. An additional mapping symbol sub block generating part(420) generates additional mapping symbol sub blocks which corresponds to each sub block. An IFFTpart(430) performs IFFT of sub blocks and the additional mapping symbol sub blocks. An alternative signal sequence generation part(440) generates alternative signal sequences using signal subsequences and additional mapping signal subsequences. A minimum PAPR(peak to average power ratio) selecting part(450) selects the alternative signal sequence corresponding to minimum PAPR.

Abstract translation: 目的：提供一种在使用附加映射序列的正交频分复用系统中降低峰值与平均功率比的方法和装置，以通过执行子块的IFFT（快速傅里叶逆变换）和附加映射符号来产生替代信号序列 然后在时域中对子块和附加映射符号子块进行线性耦合。 构成：子块分割部分（410）将OFDM符号序列划分成两个或更多个子块。 附加的映射符号子块生成部分（420）生成对应于每个子块的附加映射符号子块。 IFFT部分（430）执行子块和附加映射符号子块的IFFT。 替代信号序列生成部分（440）使用信号子序列和附加映射信号子序列来生成备选信号序列。 最小PAPR（峰值与平均功率比）选择部分（450）选择对应于最小PAPR的替代信号序列。