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公开(公告)号：US09955504B2
公开(公告)日：2018-04-24
申请号：US14318838
申请日：2014-06-30
发明人： Jean-Baptiste Dore , Baher Mawlawi
CPC分类号： H04W74/0816 , H04L5/0007 , H04L5/0053 , H04L12/40143 , H04L12/413 , H04L27/2601
摘要： A method for multiple access to a frequency band of a communication channel of a communication network with carrier sense and collision avoidance, the said frequency band being divided into a set of sub-bands includes, at a source node, detecting the availability of the communication channel and transmitting to a destination node a request message for authorization to send data on the communication channel sent over one or more sub-bands, and, at the destination node, detecting simultaneous request messages for authorization to send data on the communication channel transmitted by a plurality of source nodes over a plurality of sub-bands. A message is transmitted authorizing the sending of data on the communication channel by at least one source node among the said plurality of source nodes.
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公开(公告)号：US09001931B2
公开(公告)日：2015-04-07
申请号：US14067222
申请日：2013-10-30
CPC分类号： H03C3/02 , G06K19/0723 , H04L1/0042 , H04L27/2046
摘要： The present invention relates to a digital modulation method and a corresponding modulator. The modulator comprises a transcoder (110) followed by a FIFO register (120) and a 2-PSK modulator (130). The transcoder codes a binary word of fixed size into a code word of variable size using a transcoding table. The transcoding table codes at least one first binary word, leading to a first number of phase transitions at the output of the modulator, into a second word of size greater than that of the first word, leading to, at the output of the modulator, a second number of phase transitions less than the first number of phase transitions.
摘要翻译： 本发明涉及数字调制方法和相应的调制器。 调制器包括一个跟随有FIFO寄存器（120）和2-PSK调制器（130）的代码转换器（110）。 代码转换器使用转码表将固定大小的二进制字编码成可变大小的码字。 代码转换表将至少一个第一二进制字编码，导致在调制器的输出处的第一数目的相变大于第一个字的大小的第二个字，导致在调制器的输出处， 第二数量的相变小于第一数量的相变。
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公开(公告)号：US09210000B2
公开(公告)日：2015-12-08
申请号：US14547625
申请日：2014-11-19
发明人： Jean-Baptiste Dore , Vincent Berg
CPC分类号： H04L25/0204 , H04L25/0212 , H04L25/0224 , H04L25/03057 , H04L27/264 , H04L27/2647 , H04L2025/03796
摘要： The invention relates to a channel estimating method for an FBMC telecommunication system. The disclosed estimating method uses the signal before it is filtered by the analysis filter bank.According to a first embodiment, the preamble is composed of a repetition in time of an elementary pattern of pilot symbols and the channel estimate is made in the stationary part of the preamble.According to a second embodiment, the preamble is composed of a predetermined pattern of pilot symbols distributed in time and in frequency, and the channel estimate may be made on a typical part of the preamble.The channel thus estimated is used to make an equalisation before the analysis filter bank.
摘要翻译： 本发明涉及FBMC电信系统的信道估计方法。 所公开的估计方法在由分析滤波器组滤波之前使用该信号。 根据第一实施例，前导码由导频符号的基本模式的时间重复组成，并且在前导码的静止部分中进行信道估计。 根据第二实施例，前导码由在时间和频率上分布的导频符号的预定模式组成，并且可以在前导码的典型部分上进行信道估计。 这样估计的信道用于在分析滤波器组之前进行均衡。
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公开(公告)号：US09031172B2
公开(公告)日：2015-05-12
申请号：US14067137
申请日：2013-10-30
CPC分类号： H04B5/0025 , H04L25/03178 , H04L27/01 , H04L27/2071 , H04L27/22
摘要： The present invention relates to a method for equalizing modulation symbols transmitted on a non-linear transmission channel. The equalizing method operates on a sequence of observables, each non-linearly depending on a predetermined number of consecutive modulation symbols, and is based on a Viterbi algorithm. It comprises a prior step of receiving a pilot sequence of modulation symbols and storing corresponding observables (110), said pilot sequence leading to a path passing through all the branches of the lattice.In a second step (120), for each symbol to be equalized, for each branch, a branch metric is calculated as a distance between the observable corresponding to the modulation symbol to be equalized and the observable stored for said branch.
摘要翻译： 本发明涉及一种均衡在非线性传输信道上发送的调制符号的方法。 均衡方法对可观测序列进行操作，每个可观测序列根据预定数量的连续调制符号而非线性地操作，并且基于维特比算法。 它包括接收调制符号的导频序列并存储对应的可观察值（110）的前一步骤，所述导频序列导向通过格子的所有分支的路径。 在第二步骤（120）中，对于每个要被均衡的符号，对于每个分支，分支度量被计算为对应于待均衡的调制符号的可观察距离和对于所述分支存储的可观察距离之间的距离。
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5.发明申请公开(公告)号：US20140125423A1
公开(公告)日：2014-05-08
申请号：US14067222
申请日：2013-10-30
IPC分类号： H03C3/02
CPC分类号： H03C3/02 , G06K19/0723 , H04L1/0042 , H04L27/2046
摘要： The present invention relates to a digital modulation method and a corresponding modulator. The modulator comprises a transcoder (110) followed by a FIFO register (120) and a 2-PSK modulator (130). The transcoder codes a binary word of fixed size into a code word of variable size using a transcoding table. The transcoding table codes at least one first binary word, leading to a first number of phase transitions at the output of the modulator, into a second word of size greater than that of the first word, leading to, at the output of the modulator, a second number of phase transitions less than the first number of phase transitions.
摘要翻译： 本发明涉及数字调制方法和相应的调制器。 调制器包括一个跟随有FIFO寄存器（120）和2-PSK调制器（130）的代码转换器（110）。 代码转换器使用转码表将固定大小的二进制字编码成可变大小的码字。 代码转换表将至少一个第一二进制字编码，导致在调制器的输出处的第一数目的相变大于第一个字的大小的第二个字，导致在调制器的输出处， 第二数量的相变小于第一数量的相变。
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公开(公告)号：US09178727B2
公开(公告)日：2015-11-03
申请号：US14474728
申请日：2014-09-02
CPC分类号： H04L25/03159 , H04L27/2601 , H04L27/264 , H04L27/2657
摘要： A filter bank receiver (FBMC) effecting a carrier frequency offset compensation in the frequency domain. The receiver comprises an FFT module extended by the overlap factor (610), a module (630) offsetting a predetermined number of subcarriers at the output of the FFT followed by a filter for reducing interference between subcarriers (640), the number of subcarriers and the coefficients of the interference reduction filter being determined from an estimation () of the frequency offset. The vector of samples thus obtained is then the subject of channel equalisation (650) before being filtered by a battery of analysis filters and spectrally de-spread (660). Finally, after spectral de-spreading, the vector of samples is demodulated by an OQAM demodulation (670) so as to recover the transmitted data.
摘要翻译： 滤波器组接收器（FBMC）在频域中实现载波频率偏移补偿。 接收机包括通过重叠因子（610）延伸的FFT模块，在FFT的输出处抵消预定数量的子载波的模块（630），随后是用于减少子载波（640）之间的干扰的滤波器，子载波的数量和 根据频率偏移的估计（）来确定干扰减少滤波器的系数。 这样获得的样本的矢量然后是通过电池的分析滤波器和光谱去扩散（660）滤波之前的信道均衡（650）的对象。 最后，在频谱解扩后，通过OQAM解调（670）解调采样矢量，以恢复发送的数据。
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公开(公告)号：US09706575B2
公开(公告)日：2017-07-11
申请号：US14533480
申请日：2014-11-05
CPC分类号： H04W74/0816 , H04L5/0005 , H04L5/0053 , H04W72/00 , H04W74/004
摘要： The invention relates to a multiple access method to a frequency band of a communication channel of a communication network with carrier sensing and collision avoidance, said frequency band being broken down into a set of sub-bands (SB0, SB1, . . . , SBi, . . . , SBn) of the communication channel, characterized in that it comprises at a source node, after it has been detected that the communication channel is available, the transmission to a destination node of several request to send messages on the communication channel (RTS NS0, RTS NS1), each of said messages being sent on a sub-band of the communication channel.
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