公开(公告)号：US20020042253A1

公开(公告)日：2002-04-11

申请号：US09970694

申请日：2001-10-05

Applicant: ALCATEL

Inventor： Luc Dartois

IPC: H04B001/04

CPC classification number: H03F1/3247 ,  H03F2200/102 ,  H03F2201/3236

Abstract: The invention relates notably to a method for clipping a wideband signal in order to eliminate signal overshots having an amplitude above a predefined threshold before submitting the wideband signal to a power amplifier. According to the invention, the method comprises the steps of: i. subtracting from the wideband signal filtered pulses in phase the said wideband signal, each filtered pulse corresponding to an overshot, the amplitude of each filtered pulse being dependent on the amplitude of the corresponding overshot and on the predefined threshold. ii. repeating at least two successive iterations of step i on said wideband signal.

Abstract translation: 本发明特别涉及一种用于削波宽带信号的方法，以便在将宽带信号提交给功率放大器之前，消除幅度高于预定阈值的信号超时。 根据本发明，该方法包括以下步骤： 从宽带信号中滤除所述宽带信号的滤波脉冲，每个滤波的脉冲对应于过拍，每个滤波的脉冲的幅度取决于相应的超拍的幅度和预定阈值。 ii。 在所述宽带信号上重复步骤i的至少两次连续迭代。

公开(公告)号：US20040042559A1

公开(公告)日：2004-03-04

申请号：US10622549

申请日：2003-07-21

Applicant: ALCATEL

Inventor： Peter Jaenecke ,  Jens Strauss ,  Luc Dartois

IPC: H04K001/02 ,  H04L025/03 ,  H04L025/49

CPC classification number: H04L27/2624 ,  H03F1/0205 ,  H03F1/32 ,  H03F1/3294

Abstract: The invention relates notably to a method for scaling peak power amplitudes in a signal at a transmitter before submitting said signal to a power amplifier. According to the invention, the method consists in calculating scaling factors for a pulse train comprising a group of at least two adjacent peaks which power exceed a predefined threshold (TCLIP), said scaling factor for one peak taking into account an influence on said peak which occurs if at least one other peak of said group is applied a scaling factor; applying said calculated scaling factors to said respective peaks of said group.

Abstract translation: 本发明特别涉及一种在将所述信号提交给功率放大器之前缩放发射机的信号中的峰值功率幅度的方法。 根据本发明，该方法包括计算脉冲序列的缩放因子，该脉冲序列包括功率超过预定义阈值（TCLIP）的至少两个相邻峰值的组，所述一个峰值的比例因子考虑到对所述峰值的影响 如果所述组的至少一个其他峰被应用缩放因子，则发生; 将所述计算的缩放因子应用于所述组的所述各个峰值。

公开(公告)号：US20040127188A1

公开(公告)日：2004-07-01

申请号：US10701636

申请日：2003-11-06

Applicant: ALCATEL

Inventor： Friedrich Endress ,  Luc Dartois

IPC: H04B015/00

CPC classification number: H04L27/2647 ,  H03D3/007 ,  H04B1/30 ,  H04L27/3854

Abstract: The invention relates to a direct conversion receiver for down-converting a received multi-carrier signal comprising at least a first and a second carrier signal at image carrier frequencies to a base band resulting in that the first carrier signal includes an image signal of said second carrier signal. Further, the known direct conversion receiver comprises at least a first and a second digital down-converter unit for separating the first and the second carrier signal from the down-converted multi-carrier signal after digitization. In order to make such receivers less complex and adjust them for fast time varying szenarios it is proposed to provide an error estimating unit to said receivers for calculating a compensating coefficient representing the quota and/or the phase position of the image signal of the second carrier signal being included in the first carrier signal and to remove the undesired image signal in response to said compensating coefficient.

Abstract translation: 本发明涉及一种直接转换接收机，用于将接收到的多载波信号下变频到包括至少第一和第二载波信号的载波信号到基带，导致第一载波信号包括所述第二载波信号的图像信号 载波信号。 此外，已知的直接转换接收器至少包括第一和第二数字下变频器单元，用于在数字化之后将第一和第二载波信号与下变频多载波信号分离。 为了使这样的接收机不那么复杂，并且为了快速时间变化而对它们进行调整，提出了向所述接收机提供一个误差估计单元，用于计算表示第二载波的图像信号的配额和/或相位位置的补偿系数 信号被包括在第一载波信号中并且响应于所述补偿系数去除不需要的图像信号。

公开(公告)号：US20020061075A1

公开(公告)日：2002-05-23

申请号：US09987758

申请日：2001-11-15

Applicant: ALCATEL

Inventor： Luc Dartois

IPC: H04L027/06 ,  H04L027/14

CPC classification number: H04L27/2602 ,  H04L5/06

Abstract: A method of optimizing the performance of a mobile radio system transmitter using processing operations including discrete Fourier transform (DFT) computation, filtering in the frequency domain, inverse discrete Fourier transform (IDFT) computation, overlapping of processed sample blocks, and oversampling, wherein, for a given input sampling frequency, a given order of magnitude of the output sampling frequency, and a given order of magnitude of the required frequency resolution, the length of the DFT and the length of the IDFT are chosen in such a manner as to enable the finest possible choice of the percentage overlap and/or the oversampling factor.

Abstract translation: 一种使用包括离散傅里叶变换（DFT）计算，频域滤波，逆离散傅里叶变换（IDFT）计算，处理样本块重叠和过采样等处理操作的处理操作来优化移动无线电系统发射机的性能的方法， 对于给定的输入采样频率，输出采样频率的给定数量级以及所需频率分辨率的给定数量级，DFT的长度和IDFT的长度被选择为使得能够 百分比重叠和/或过采样因子的最佳可能选择。