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1. 发明申请

WO2011104739A3 METHOD FOR REDUCING THE PEAK- TO -AVERAGE POWER RATIO OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING MODULATED SIGNAL BY MAPPING SYMBOLS IN GEOMETRIC LOCI, AND RELEVANT SYSTEM 审中-公开
标题翻译：利用几何映射符号降低正交频分复用调制信号的峰值功率比的方法及相关系统
公开(公告)号：WO2011104739A3
公开(公告)日：2011-09-01
申请号：PCT/IT2011/000049
申请日：2011-02-23
申请人： ALMA MATER STUDIORUM - UNIVERSITA' DI BOLOGNA , ROSATI, Stefano , CANDREVA, Enzo Alberto , CORAZZA, Giovanni Emanuele
发明人： ROSATI, Stefano , CANDREVA, Enzo Alberto , CORAZZA, Giovanni Emanuele
IPC分类号： H04L27/26 , H04L27/34
摘要： The present invention relates to a method for reducing the Peak-to-Average Power Ratio of an orthogonal frequency division multiplexing modulated signal, said signal having a plurality of sub-carriers, said method comprising the following steps: (a) providing a digital signal to be transmitted, said signal being expressed by a plurality of bits; (b) splitting said digital signal into a plurality of bits; (c) assigning a geometric locus of the points of the complex plane to one or more blocks of bits obtaining a plurality of primary symbols ( x [ k ]) each one univocally and sequentially associated to one respective of said sub-carriers; (d) carrying out an inverse discrete Fourier transform (IDFT) obtaining the time domain signal (s[i]); (e) carrying out a cut of the amplitude of said time domain signal (s[i]) with respect of a set beforehand amplitude (ξ); (f) carrying out a discrete Fourier transform (DFT) obtaining a plurality of transformed symbols ( x [ k ]); and (g) restoring the position of said transformed symbols ( x [ k ]) in the geometric locus, assigned in said step (c), to which the respective primary symbols ( x [ k ]) belong.
摘要翻译：本发明涉及一种用于降低正交频分复用调制信号的峰均功率比的方法，所述信号具有多个子载波，所述方法包括以下步骤：（a）提供要发送的数字信号，所述信号由多个比特表示; （b）将所述数字信号分成多个比特; （c）将复平面的点的几何轨迹分配给一个或多个比特块，每个比特获得多个主码元（x [k]），并顺序地与所述子载波中的一个相关联; （d）执行获得时域信号（s [i]）的离散傅里叶逆变换（IDFT）; （e）相对于预先设定的振幅（ξ）执行所述时域信号的振幅的削减（s [i]）; （f）进行离散傅里叶变换（DFT），获得多个变换符号（x [k]）; 和（g）恢复在所述步骤（c）中分配的几何轨迹中的所述变换符号（x [k]）的位置，其中各个主要符号（ k ]）。

2. 发明申请

WO2011104739A2 METHOD FOR REDUCING THE PEAK-TO-AVERAGE POWER RATIO OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING MODULATED SIGNAL BY MAPPING SYMBOLS IN GEOMETRIC LOCI, AND RELEVANT SYSTEM 审中-公开
标题翻译：用于通过几何位置中的映射符号和相关系统降低正交频分复用调制信号的峰值到平均功率比的方法
公开(公告)号：WO2011104739A2
公开(公告)日：2011-09-01
申请号：PCT/IT2011000049
申请日：2011-02-23
申请人： UNIV BOLOGNA ALMA MATER , ROSATI STEFANO , CANDREVA ENZO ALBERTO , CORAZZA GIOVANNI EMANUELE
发明人： ROSATI STEFANO , CANDREVA ENZO ALBERTO , CORAZZA GIOVANNI EMANUELE
IPC分类号： H04L27/26 , H04L27/34
CPC分类号： H04L27/2624 , H04L27/3411
摘要： The present invention relates to a method for reducing the Peak-to-Average Power Ratio of an orthogonal frequency division multiplexing modulated signal, said signal having a plurality of sub-carriers, said method comprising the following steps: (a) providing a digital signal to be transmitted, said signal being expressed by a plurality of bits; (b) splitting said digital signal into a plurality of bits; (c) assigning a geometric locus of the points of the complex plane to one or more blocks of bits obtaining a plurality of primary symbols (x[k]) each one univocally and sequentially associated to one respective of said sub-carriers; (d) carrying out an inverse discrete Fourier transform (IDFT) obtaining the time domain signal (s[i]); (e) carrying out a cut of the amplitude of said time domain signal (s[i]) with respect of a set beforehand amplitude (?); (f) carrying out a discrete Fourier transform (DFT) obtaining a plurality of transformed symbols (x[k]); and (g) restoring the position of said transformed symbols (x[k]) in the geometric locus, assigned in said step (c), to which the respective primary symbols (x[k]) belong.
摘要翻译：本发明涉及一种降低正交频分复用调制信号的峰均功率比的方法，所述信号具有多个子载波，所述方法包括以下步骤：（a）提供数字信号要发送，所述信号由多个比特表示; （b）将所述数字信号分解成多个位; （c）将复平面的点的几何轨迹分配给一个或多个位块，获得多个主符号（x [k]），每个主符号与每个所述副载波单一地和顺序地相关联; （d）执行获得时域信号（s [i]）的离散傅里叶逆变换（IDFT）; （e）相对于设定的预先振幅（ω）执行所述时域信号（s [i]）的振幅的切割; （f）执行获得多个变换符号（x [k]）的离散傅里叶变换（DFT）; 以及（g）恢复在所述步骤（c）中分配的几何轨迹中的所述变换的符号（x [k]）的位置，各个主要符号（x [k]）所属的位置。

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