-
公开(公告)号：US07500173B2
公开(公告)日：2009-03-03
申请号：US10920435
申请日：2004-08-18
申请人： Nicolas Paul , Jérôme Brouet , Jacques Antoine , Lionel Husson , Armelle Wautier , Jean-Claude Dany
发明人： Nicolas Paul , Jérôme Brouet , Jacques Antoine , Lionel Husson , Armelle Wautier , Jean-Claude Dany
CPC分类号： H03M13/6502 , H03M13/1525 , H03M13/3988 , H03M13/41
摘要： A method of decoding a received data word (r) having been transmitted over a radio communication channel, the corresponding sent data word (m) having been encoded as a code word (c), the method includes:multiplying of the received data word by a parity-check matrix,and if the result of the multiplication is zero: performing an algebraic decoding of the received data word without error correction, otherwise performing an error correction by estimating the transmission error, subtracting the estimated error from the received data word, and performing an algebraic decoding of the result of the subtraction, wherein for estimation of the transmission error is used to identify an approximate location of potential errors and the Viterbi algorithm is only applied for these locations, thus avoiding iterations in error-free areas.
摘要翻译： 一种对已经通过无线电通信信道发送的接收数据字（r）进行解码的方法，所述对应的发送数据字（m）已被编码为码字（c），所述方法包括：将所接收的数据字乘以 奇偶校验矩阵，并且如果乘法的结果为零：对接收到的数据字执行代码解码而不进行纠错，否则通过估计传输误差来执行纠错，从接收到的数据字中减去估计的误差， 并执行减法结果的代数解码，其中用于估计传输错误用于识别潜在错误的大致位置，并且维特比算法仅适用于这些位置，从而避免无错误区域中的迭代。
-
公开(公告)号：US20050050433A1
公开(公告)日：2005-03-03
申请号：US10920435
申请日：2004-08-18
申请人： Nicolas Paul , Jerome Brouet , Jacques Antoine , Lionel Husson , Armelle Wautier , Jean-Claude Dany
发明人： Nicolas Paul , Jerome Brouet , Jacques Antoine , Lionel Husson , Armelle Wautier , Jean-Claude Dany
CPC分类号： H03M13/6502 , H03M13/1525 , H03M13/3988 , H03M13/41
摘要： The present invention relates to a method of decoding a received data word (r) having been transmitted over a radio communication channel, the corresponding sent data word (m) having been encoded as a code word (c), the method comprises the steps of multiplying of the received data word by a parity-check matrix, and if the result of the multiplication is zero: performing an algebraic decoding of the received data word without error correction, otherwise performing an error correction by estimating the transmission error, subtracting the estimated error from the received data word, and performing an algebraic decoding of the result of the subtraction, wherein for estimation of the transmission error R.H′ is used to identify an approximate location of potential errors and the Viterbi algorithm is only applied for these locations, thus avoiding iterations in error-free areas.
摘要翻译： 本发明涉及一种已经通过无线电通信信道发送的接收数据字（r）的解码方法，该对应的发送数据字（m）已被编码为码字（c），该方法包括以下步骤： 将接收到的数据字乘以奇偶校验矩阵，并且如果乘法结果为零：对接收到的数据字执行代码解码而不进行纠错，否则通过估计传输误差来执行纠错，减去估计的 对所接收到的数据字进行误差，对减法结果进行代数解码，其中为了估计传输误差RH'用于识别潜在误差的近似位置，维特比算法仅适用于这些位置，因此 避免无错误区域的迭代。
-
3.发明授权Handover from a microcell layer to a macrocell layer in a two-layer cell of a telecommunication network 失效从电信网络的双层小区中的微小区层到宏小区层的切换公开(公告)号：US06484030B1
公开(公告)日：2002-11-19
申请号：US09388623
申请日：1999-09-02
IPC分类号： H04Q720
摘要： In a method of communicating with a mobile station in a cell of a cellular telecommunication network having a microcell layer with a plurality of microcells each comprising at least one relay station and a macrocell layer with a macrocell covering a plurality of microcells, a call in the microcell layer is effected between the mobile station and a set of relay stations, the number of which is a cardinal number at least equal to two, allocated to the call. The relay stations allocated to the call can change during the call, and the call is handed over from the microcell layer to the macrocell layer when it is not possible to allocate to the call a number of relay stations corresponding to the cardinal number. A base transceiver station for implementing the invention is also disclosed.
摘要翻译： 在与具有多个微小区的微小区层的蜂窝电信网络的小区中的移动站进行通信的方法中，所述多个微小区各自包括至少一个中继站和具有覆盖多个微小区的宏小区的宏小区， 在移动台和分配给呼叫的一组中继站之间实现微小区层，其中一组中继站是至少等于2的基数。 分配给呼叫的中继站可以在呼叫期间改变，并且当不可能向呼叫分配对应于基数的多个中继站时，呼叫从微小区层切换到宏小区层。 还公开了一种用于实现本发明的基站收发台。
-
4.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。
-
5.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。
-
6.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。
-
7.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）。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.023 秒)
