公开(公告)号：US06522703B1

公开(公告)日：2003-02-18

申请号：US09363840

申请日：1999-07-30

申请人： Valérie Cueff ,  Michel Terre

发明人： Valérie Cueff ,  Michel Terre

IPC分类号： H04L2718

CPC分类号： H04L27/2332

摘要： The invention relates to a method of estimating the frequency offset of a packet of phase modulated symbols received with phase error, the method comprising: applying a phase correction to the symbols of the received packet for all possible pairs of frequency offset and phase offset; and selecting from said offset pairs, the pair which provides the most likely packet of corrected symbols, thereby determining the frequency offset of the received packet. Compared with known solutions, the invention makes it possible to reduce errors concerning estimated frequency. Advantageously, the method comprises a step of quantizing the possible phase corrections, thereby making it possible to reduce the complexity of the calculations to be performed, without degrading performance.

摘要翻译： 本发明涉及一种估计相位误差接收的相位调制符号的分组的频偏的方法，该方法包括：针对所有可能的频偏和相位偏移对，对接收分组的符号应用相位校正; 并且从所述偏移对中选择一对，其提供最可能的校正符号分组，从而确定接收到的分组的频率偏移。与已知解决方案相比，本发明使得可以减少关于估计频率的误差。 有利地，该方法包括量化可能的相位校正的步骤，从而可以降低要执行的计算的复杂性，而不降低性能。

公开(公告)号：US07127006B2

公开(公告)日：2006-10-24

申请号：US10157948

申请日：2002-05-31

申请人： Jacques Eudes ,  Valérie Cueff ,  Marc Isard

发明人： Jacques Eudes ,  Valérie Cueff ,  Marc Isard

IPC分类号： H04L27/36

CPC分类号： H04L27/0008 ,  H04B7/2643

摘要： The invention relates notably to a method for transmitting frames on a radio communication channel (RCC), the frames comprising a succession of bursts (B1, . . . , Bn) modulated with at least two different modulation schemes (M1, M2, M3) having different modulation efficiencies, each modulation scheme (M1, M2, M3) having a corresponding average transmitted power.The method according to the invention comprises the steps of: mapping information to be transmitted to modulation symbols using one of the modulation schemes (M1, M2, M3); filtering the modulation symbols using a digital transmission filter with a set of coefficients, the set being chosen from at least two sets of coefficients depending on the modulation scheme (M1, M2, M3) used at the mapping step, the product of the average transmitted power and the gain of the digital transmission filter being smaller than a predefined value for all modulation schemes (M1, M2, M3).

摘要翻译： 本发明特别涉及一种用于在无线电通信信道（RCC）上发送帧的方法，所述帧包括用至少两个不同调制方案（M 1，M 2）调制的一连串突发（B 1，...，B n） ，M 3）具有不同调制效率的每个调制方案（M 1，M 2，M 3）具有相应的平均发射功率。 根据本发明的方法包括以下步骤：使用调制方案（M 1，M 2，M 3）之一将要发送的信息映射到调制符号; 使用具有一组系数的数字传输滤波器对调制符号进行滤波，该组根据在映射步骤中使用的调制方案（M 1，M 2，M 3）从至少两组系数中选择，乘积 平均发射功率和数字传输滤波器的增益小于所有调制方案（M 1，M 2，M 3）的预定义值。