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1.发明授权
公开(公告)号：US5537438A
公开(公告)日：1996-07-16
申请号：US204449
申请日：1994-03-02
摘要： In mobile radio communications systems using time-division multiple access (TDMA), intersymbol interference caused by time differences in multipath media is avoided by equalizing data blocks. When a data block (BD) is received, the impulse response of the channel on which the block was transmitted is estimated, a set of receive parameters (PP) is evaluated, an optimal length (Nopt) of the block (BD) is determined from the parameters (PP), and when the optimal length (Nopt) is less than the actual length (N) of the block (BD), channel variation tracking (PO) is undertaken.
摘要翻译： 在使用时分多址（TDMA）的移动无线电通信系统中，通过均衡数据块来避免由多路径介质中的时间差引起的码间干扰。 当接收到数据块（BD）时，估计发送块的信道的脉冲响应，评估一组接收参数（PP），确定块（BD）的最佳长度（Nopt） 从参数（PP）中，当最佳长度（Nopt）小于块（BD）的实际长度（N）时，进行信道变化跟踪（PO）。
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2.发明授权
公开(公告)号：US5606580A
公开(公告)日：1997-02-25
申请号：US275732
申请日：1994-07-19
CPC分类号： H04L1/0007 , H04L2025/03796 , H04L25/03006
摘要： A method for adjusting the length of a data block in a time-division multiple access communication system includes estimating the impulse response of a communication channel from received symbols of a reference sequence, estimating a signal-to-noise ratio from the channel impulse response, and estimating a maximum Doppler shift. Using these estimations, upper and lower limit functions of a normalized estimated mean squared error are calculated, and the length of the data block is adjusted to an optimal length determined from the upper and lower limit functions.
摘要翻译： 一种用于调整时分多址通信系统中的数据块的长度的方法包括从参考序列的接收符号估计通信信道的脉冲响应，从信道脉冲响应估计信噪比， 并估计最大多普勒频移。 使用这些估计，计算归一化估计均方误差的上限和下限函数，并将数据块的长度调整到从上限和下限函数确定的最佳长度。
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3.发明授权Learning sequence for estimating a transmission channel and corresponding estimator device 失效用于估计传输信道和相应的估计器件的学习序列
公开(公告)号：US5559723A
公开(公告)日：1996-09-24
申请号：US153097
申请日：1993-11-17
CPC分类号： H04L25/0226 , H04L2025/03789
摘要： The present invention concerns a learning sequence for estimating a transmission channel and an estimator device adapted to use a sequence of this kind. The learning sequence for estimating a transmission channel of length L comprises a guard sequence of length L followed by a reference sequence of length N such that its total length N+L is greater than or equal to 2L+1 and such that the transmission matrix A associated with it defined by the product of the Hermitian transpose A.sup.H of the transmission matrix by the transmission matrix A is inversible.
摘要翻译： 本发明涉及用于估计传输信道的学习序列和适于使用这种序列的估计器件。 用于估计长度为L的传输信道的学习序列包括长度为L的保护序列，随后是长度为N的参考序列，使得其总长度N + L大于或等于2L + 1，并且使得传输矩阵A 与由传送矩阵A的传递矩阵的Hermit转置AH的乘积所定义的关联的信息是不可逆的。
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4.发明授权Method for determining the transmittance of a filter circuit adapted to transform the impulse response of a filter into a minimal phase response and filter implementing this method 失效用于确定适于将滤波器的脉冲响应转换成最小相位响应的滤波器电路的透射率的方法以及实现该方法的滤波器
公开(公告)号：US5511014A
公开(公告)日：1996-04-23
申请号：US125663
申请日：1993-09-23
CPC分类号： H03H17/0216
摘要： A method for determining the transmittance of a filter circuit adapted to transform the impulse response of a filter into a minimal phase response entails computing the theoretical frequency response of the filter circuit and the minimal phase frequency impulse response with a causality condition applied to the cepstrum of the minimal phase response, determining the theoretical transmittance as the inverse fast Fourier transform of the theoretical frequency response, estimating the transmittance of the filter circuit by truncation of the theoretical transmittance of which only a predetermined number of coefficients are retained and determining the minimal phase global response from a limited expansion of the cepstrum.
摘要翻译： 用于确定适于将滤波器的脉冲响应转换为最小相位响应的滤波器电路的透射率的方法包括计算滤波器电路的理论频率响应和最小相位频率脉冲响应，其中因果关系条件被应用于 最小相位响应，确定理论透射率作为理论频率响应的快速傅立叶逆变换，通过截断仅保留预定数量的系数的理论透射率来估计滤波器电路的透射率，并确定最小相位全局 来自倒谱的有限扩展的回应。
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5.发明授权Device for making decisions by estimating the viterbi algorithm in a mobile radio system 失效通过估计移动无线电系统中的维特比算法进行决策的装置
公开(公告)号：US5864589A
公开(公告)日：1999-01-26
申请号：US441440
申请日：1995-05-15
申请人： Christophe Mourot , Vinod Kumar
发明人： Christophe Mourot , Vinod Kumar
IPC分类号： H04L27/00 , H03M13/23 , H04B7/005 , H04B7/26 , H04L1/00 , H04L1/20 , H04L25/03 , H04L25/08 , H03D1/00
CPC分类号： H04L1/0019 , H04L1/0001 , H04L1/0054 , H04L1/20 , H04L1/0057 , H04L25/03178
摘要： In a mobile radio system including mobile terminals each terminal comprises, on the receiving side, a unit using the Viterbi algorithm for equalization or for decoding the received signals after demodulation. A decision device of this system calculates the mean and the standard deviation of the metrics of each branch of the Viterbi algorithm, determines a quality level of a transmission parameter corresponding to the results of this calculation and compares the estimated quality level and a required quality level of the parameter in order to produce a decision signal supplied to a decision unit which can modify one or more transmission characteristics.
摘要翻译： 在包括移动终端的移动无线电系统中，每个终端在接收侧包括使用维特比算法进行均衡的解调单元或解调之后对接收到的信号进行解码的单元。 该系统的决策装置计算维特比算法的每个分支的度量的平均值和标准偏差，确定与该计算结果相对应的传输参数的质量水平，并将估计的质量水平和所需的质量水平进行比较 以产生提供给可修改一个或多个传输特性的决定单元的判定信号。
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6.发明授权
公开(公告)号：US5754538A
公开(公告)日：1998-05-19
申请号：US518710
申请日：1995-08-24
申请人： Vinod Kumar , Christophe Mourot
发明人： Vinod Kumar , Christophe Mourot
CPC分类号： H04B7/005
摘要： In a system for transmitting information via a time-varying transmission channel, learning information is transmitted in addition to wanted information to enable the transmission channel to be estimated at the receiving end. The system estimates if it is necessary to transmit learning information given the current variations of the transmission channel and transmits learning information only if this is deemed necessary.
摘要翻译： 在用于通过时变传输信道发送信息的系统中，除了想要的信息之外还发送学习信息，以使接收端能够估计传输信道。 系统估计是否需要传送给定传输通道的当前变体的学习信息，并且只有在必要时才传送学习信息。
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公开(公告)号：US5479446A
公开(公告)日：1995-12-26
申请号：US128234
申请日：1993-09-29
申请人： Christophe Mourot
发明人： Christophe Mourot
CPC分类号： H04B7/005
摘要： A channel estimation device receives at one end of the channel a training sequence corresponding to a learning sequence produced at the other end of the channel. The estimation device generates a replica of the learning sequence and establishes the correlation of the learning and training sequences in order to produce a set of correlation coefficients. The estimation device includes a corrector device for eliminating the coefficients having the lowest moduli. The criteria used for eliminating the lowest moduli coefficients is that the sum of the squares of the moduli of the eliminated coefficients is less than a fraction of the sum of the squares of the moduli of all the correlation coefficients.
摘要翻译： 信道估计装置在信道的一端接收对应于在信道另一端产生的学习序列的训练序列。 估计装置产生学习序列的副本，并建立学习和训练序列的相关性，以产生一组相关系数。 估计装置包括用于消除具有最低模数的系数的校正装置。 用于消除最低模量系数的标准是，消除系数的模数的平方和小于所有相关系数的模数的平方和的和的一小部分。
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公开(公告)号：US5822315A
公开(公告)日：1998-10-13
申请号：US716299
申请日：1996-09-24
申请人： Fabrice de Seze , Marc Delprat , Christophe Mourot
发明人： Fabrice de Seze , Marc Delprat , Christophe Mourot
CPC分类号： H04B7/2656
摘要： A mobile radio system conveys frames between at least one mobile station and at least one base station, each frame comprising N time slots, a burst of data being transmitted in each time slot, and each time slot being associated with a separate call between a mobile station and a base station. For each call over a transmission channel, the quality of the transmission channel is analyzed and, on the, basis thereof, a selection is made between first and second modes of transmission. In the first mode of transmission data to be transmitted is organized in first blocks obtained by a first encoding of source blocks, each of the first blocks has a size greater than the content of (P-1) bursts, where P is an even number at least equal to 2, and the data of the same first block is distributed between at least P bursts. In the second mode of transmission the data to be transmitted is organized in second blocks each having a size less than or equal to the content of P/2 bursts, the data of the same second block is distributed into at most P/2 bursts, at least P/2 bursts are available relative to the first mode of transmission, and an automatic retransmission request mechanism is used to retransmit in the available bursts second blocks that are detected to have been received incorrectly. This second mode of transmission necessitates a quality of the transmission channel greater than that necessitated by the first mode of transmission.
摘要翻译： PCT No.PCT / FR95 / 00381 Sec。 371日期：1996年9月24日 102（e）1996年9月24日PCT 1995年3月27日PCT公布。 WO95 / 27345 PCT公开号 日期1995年10月12日移动无线电系统在至少一个移动台和至少一个基站之间传送帧，每个帧包括N个时隙，在每个时隙中发送数据的突发，并且每个时隙与 移动台和基站之间的分离呼叫。 对于通过传输信道的每个呼叫，分析传输信道的质量，并且基于此，在第一和第二传输模式之间进行选择。 在要发送的第一传输模式中，通过源块的第一编码获得的第一块被组织，每个第一块具有大于（P-1）个突发的内容的大小，其中P是偶数 至少等于2，并且相同的第一块的数据分布在至少P个突发之间。 在第二发送模式中，要发送的数据被组织在具有小于或等于P / 2脉冲串的内容的大小的第二块中，同一第二块的数据被分配到最多P / 2个脉冲串， 至少P / 2脉冲串相对于第一传输模式是可用的，并且使用自动重发请求机制在可用突发中重新传输被检测到被错误接收的第二块。 该第二传输模式需要传输信道的质量大于第一传输模式所需的质量。
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9.发明授权Encoding/interleaving method and corresponding deinterleaving/decoding method 失效编码/交织方法和相应的去交织/解码方法
公开(公告)号：US5751730A
公开(公告)日：1998-05-12
申请号：US716151
申请日：1996-09-12
申请人： Christophe Mourot
发明人： Christophe Mourot
CPC分类号： H03M13/2707
摘要： A method of encoding/interleaving a source sequence of data symbols to be transmitted to produce at least two bursts to be sent made up of said data symbols to be transmitted and redundancy symbols writes the data symbols to be transmitted into a base matrix. It stores the base matrix in a first quadrant of a send extended matrix. It carries out first and second encoding steps using the columns and rows, respectively, of the base matrix, generating first and second redundancy symbols which are stored in second and third quadrants of the send extended matrix and constitute additional rows of the base matrix. It reads the send extended matrix row by row (or column by column), each row (or column) of the send extended matrix constituting a burst to be sent.
摘要翻译： PCT No.PCT / FR95 / 00283 Sec。 371日期：1996年9月12日 102（e）日期1996年9月12日PCT提交1995年3月10日PCT公布。 WO95 / 25386 PCT公开 日期1995年9月21日一种对要发送的数据符号的源序列进行编码/交织的方法，以产生由要发送的所述数据符号组成的至少两个要发送的突发，冗余符号将要发送的数据符号写入 基础矩阵。 它将基本矩阵存储在发送扩展矩阵的第一个象限中。 它分别使用基本矩阵的列和行来执行第一和第二编码步骤，产生存储在发送扩展矩阵的第二和第三象限中并构成基本矩阵的附加行的第一和第二冗余符号。 它逐行（或逐列）读取发送扩展矩阵，发送扩展矩阵的每行（或列）构成要发送的突发。
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公开(公告)号：US5815533A
公开(公告)日：1998-09-29
申请号：US416975
申请日：1995-04-05
申请人： Christophe Mourot
发明人： Christophe Mourot
IPC分类号： H03H15/00 , H03H17/00 , H03H21/00 , H04B3/04 , H04B7/005 , H04B7/26 , H04L1/00 , H03K9/00 , H04L27/06 , H04L27/14 , H04L27/22
CPC分类号： H04B7/005
摘要： A receive processor device, in particular for a digital mobile radio system, includes a processor system comprising a set of functional units connected in cascade, some of which are decision units adapted to make decisions as to the value of information symbols that they receive. The decision unit is bypassed in the processor system and the value of information symbols to be processed by the next unit is deleted if the transmission quality of information symbols received by a decision unit is poor. Probable values for the deleted information symbols are determined from deleted information symbols and from undeleted information symbols received by the next unit.
摘要翻译： 特别是对于数字移动无线电系统的接收处理器设备包括处理器系统，该处理器系统包括级联连接的一组功能单元，其中一些功能单元适于作出关于它们接收的信息符号的值的决定。 如果决策单元接收到的信息符号的传输质量差，则在处理器系统中绕过决策单元并且删除由下一单元处理的信息符号的值。 从删除的信息符号和由下一个单元接收的未删除的信息符号确定被删除的信息符号的可能值。
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