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51. 发明授权

US07058115B2 Equalization method and device of the GMMSE type 失效
标题翻译： GMMSE型均衡方法及装置
公开(公告)号：US07058115B2
公开(公告)日：2006-06-06
申请号：US10097007
申请日：2002-03-14
申请人： Damien Castelain
发明人： Damien Castelain
IPC分类号： H04B1/69
CPC分类号： H04L27/2647 , H04L5/026 , H04L2025/03414
摘要： An equalization method and apparatus for a downlink channel in a telecommunication system transmitting MC-CDMA symbols on a plurality of carrier frequencies, in which a plurality of links are established between a transmitter and a plurality of receivers in order to transmit a plurality of coded signals, each link using a distinct access code amongst N possible codes, there being P links for P users where P is less than N. The equalization including the formation and use of a matrix of reduced size based upon the number of links being P by eliminating matrix elements relating to the unused codes and effecting an estimation of the said transmitted symbols according to a mean square error minimization criterion.
摘要翻译：一种用于在多个载波频率上发送MC-CDMA符号的电信系统中的下行链路信道的均衡方法和装置，其中在发射机和多个接收机之间建立多个链路以便发送多个编码信号，每个链路在N个可能码中使用不同的接入码，对于P小于N的P个用户，存在P个链路。均衡包括基于通过消除的链路数目P来减小大小的矩阵的形成和使用与未使用的代码有关的矩阵元素，并根据均方误差最小化准则对所述发送符号进行估计。

52. 发明授权

US06876672B1 Method of transmitting data on multiple carriers from a transmitter to a receiver and receiver designed to implement the said method 失效
标题翻译：将多载波上的数据从发射机发射到被设计用于实现所述方法的接收机和接收机的方法
公开(公告)号：US06876672B1
公开(公告)日：2005-04-05
申请号：US09624858
申请日：2000-07-24
申请人： Damien Castelain
发明人： Damien Castelain
IPC分类号： H04J11/00 , H04L7/00 , H04L25/02 , H04L27/26 , H04J1/00
CPC分类号： H04L25/0232 , H04L25/022 , H04L27/2657 , H04L27/2662 , H04L27/2679
摘要： A method of transmitting data on multiple carriers is disclosed, the method consisting, on a transmitter side, of binary to signal coding of the data to be transmitted so as to form modulation signals, of modulating a plurality of sub-carriers with the modulation signals as to form symbols, referred to as OFDM symbols, and then of transmitting, over a channel between the transmitter and a receiver, the OFDM symbols at a rate which is related to a sampling frequency referred to as the transmitter sampling frequency, and, on the receiver side, of determining, from a clock signal at a frequency related to a sampling frequency referred to as the receiver sampling frequency, an analysis window for the signal received from the transmitter so as to form a block of samples, and of estimating the transmitted modulation signals by demodulating the sub-carriers for the block of samples under consideration.
摘要翻译：公开了一种在多个载波上传输数据的方法，该方法在发射机侧由二进制到信号编码要传输的数据以形成调制信号，用调制信号调制多个副载波为了形成被称为OFDM符号的符号，然后以发射机和接收机之间的信道以与被称为发射机采样频率的采样频率相关的速率发送OFDM符号，并且在接收机侧从与被称为接收机采样频率的采样频率有关的频率的时钟信号中确定从发射机接收的信号的分析窗口，以形成采样块，并且估计通过解调所考虑的样本块的子载波来发送调制信号。

53. 发明授权

US5329537A Method of maximum likelihood decoding with sub-sampled decoding trellis, and corresponding decoding device 失效
标题翻译：利用子采样解码网格的最大似然解码方法及相应的解码装置
公开(公告)号：US5329537A
公开(公告)日：1994-07-12
申请号：US7140
申请日：1993-01-21
申请人： Michel Alard , Damien Castelain , Jean-Francois Helard
发明人： Michel Alard , Damien Castelain , Jean-Francois Helard
IPC分类号： H03M13/41 , G06F11/10 , H03M13/12
CPC分类号： H03M13/41
摘要： Decoding apparatus provides the maximum likelihood decoding of a sequence of samples of the type implementing a Viterbi type of decision algorithm that defines an initial decoding trellis. Sub-sampling apparatus sub-samples the initial trellis by a ratio p to preserve nodes corresponding to one sample out of p consecutive samples. This sub-sampling apparatus associates a p order antecedent node to each preserved node. Trace-back apparatus traces an optimal path back in the sub-sampled trellis by associating the p order antecedent node for each preserved node. The trace back apparatus designates at least the last two nodes of the optimal path. Over-sampling apparatus over-samples the designation of the last two nodes of the optimal path. The factor p is an integer greater than 1 selected so that there is a single path between a node and its p order antecedent in the initial trellis. Hence the bit rate is increased by a factor p, without loss of information.
摘要翻译：解码装置提供对实现定义初始解码网格的维特比类型的决策算法的类型的样本序列的最大似然解码。次采样设备对初始格架进行子采样比例p，以保存对应于p个连续采样中的一个样本的节点。该子采样装置将p阶前置节点与每个保留的节点相关联。追溯装置通过将每个保留的节点的p阶前置节点相关联来追踪子采样网格中的最优路径。回溯装置至少指定最佳路径的最后两个节点。过采样设备对最佳路径的最后两个节点的指定进行过采样。因子p是大于1的整数，因此在初始网格中节点与其p阶前置之间存在单个路径。因此，比特率增加因子p，而不会丢失信息。

54. 发明授权

US5307376A Device for the coherent demodulation of time-frequency interlaced digital data, with estimation of the frequency response of the transmission channel and threshold, and corresponsing transmitter 失效
标题翻译：用于对时间频率隔行数字数据进行相干解调的装置，估计传输信道和阈值的频率响应，以及对应的发射机
公开(公告)号：US5307376A
公开(公告)日：1994-04-26
申请号：US820484
申请日：1992-01-14
申请人： M. Damien Castelain , M. Jean-Francois Helard , M. Bernard Le Floch , M. Jean-Christophe Rault
发明人： M. Damien Castelain , M. Jean-Francois Helard , M. Bernard Le Floch , M. Jean-Christophe Rault
IPC分类号： H04B14/00 , H04J11/00 , H04L25/02 , H04L27/00 , H04L27/26 , H04K1/10 , H04L27/28
CPC分类号： H04L27/2647 , H04L25/022 , H04L25/0226 , H04L25/0232
摘要： A method and apparatus for the coherent demodulation of a digital signal constituted by digital elements distributed in the time-frequency space and transmitted in the form of symbols constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of said digital elements and broadcast simultaneously, the digital signal also including reference elements having a known value position in said time frequency space. The method includes a Fourier transform of at least samples of said digital signal containing said reference elements from a frequency domain into a temporal domain, a weighting of the transformed samples in the temporal domain by a rectangular temporal window f.sub.n, a thresholding of the transformed samples in the temporal domain to eliminate any samples below a predetermined threshold, and a reverse Fourier transform of the samples remaining after said weighting and thresholding from the temporal domain into the frequency domain for projection onto said digital signal. The threshold level can be fixed or varied based on the power level of the noise affecting the transmission channel or an estimated pulse response of the transmission channel.
摘要翻译：一种数字信号的相干解调方法和装置，该数字信号由分布在时间 - 频率空间中的数字元素构成，并以由一组所述数字元素调制的N个正交载波的多路复用构成的码元形式发送并同时广播数字信号还包括在所述时间频率空间中具有已知值位置的参考元件。该方法包括将包含所述参考元素的所述数字信号的至少样本从频域傅里叶变换为时域，通过矩形时间窗fn对时域中的变换样本进行加权，转换样本的阈值在时域中消除低于预定阈值的任何采样，以及在从时域到频域的所述加权和阈值之后剩余的采样的逆傅立叶变换以投影到所述数字信号上。阈值电平可以基于影响传输信道的噪声的功率电平或传输信道的估计脉冲响应来修正或变化。

55. 发明授权

US5228025A Method for the broadcasting of digital data, notably for radio broadcasting at a high bit-rate towards mobile receivers, with time-frequency interlacing and assistance in the acquisition of automatic frequency control, and corresponding receiver 失效
标题翻译：用于广播数字数据的方法，用于在移动接收机的高速率下进行无线电广播的方法，具有时频接口和自动频率控制的接收以及相应的接收机的接收
公开(公告)号：US5228025A
公开(公告)日：1993-07-13
申请号：US648188
申请日：1991-01-31
申请人： Bernard Le Floch , Jean-Christophe Rault , Daniel Pommier , Damien Castelain
发明人： Bernard Le Floch , Jean-Christophe Rault , Daniel Pommier , Damien Castelain
IPC分类号： H04L1/00 , H04L27/26
CPC分类号： H04L1/0071 , H04L27/2613 , H04L27/2657 , H04L27/2675 , H04L5/0007 , H04L5/0048
摘要： A method for the broadcasting of digital data, in channels to which multiple paths are assigned, the characteristics of which vary in time, with time-frequency interlacing and assistance in the acquisition of the automatic frequency control. This method is one of the type providing for the distribution of the data in the form of digital elements in the frequency-time space f-t and the transmission of frames of symbols each constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of the digital elements and broadcast simultaneously, the method providing for the transmission of a pattern of frequency synchronization, recurrent in time. It can be applied notably for radio broadcasting at a high bit rate towards mobile receivers, and for example, to COFDM radio broadcasting.
摘要翻译：一种用于在分配多个路径的信道中广播数字数据的方法，其特征随时间而变化，并且在采集自动频率控制方面具有时频隔行扫描和协助。该方法是提供以频率 - 时间空间ft的数字元素的形式分配数据的类型之一，以及每个由多个由N个正交载波调制的N个正交载波频率构成的符号的帧的传输数字元素和广播同时，提供频率同步模式传输的方法，及时复现。它可以特别适用于朝向移动接收机的高比特率的无线电广播，并且例如适用于COFDM无线电广播。

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