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    • 4. 发明公开
    • METHOD OF REDUCING THE VARIANCE OF A SIGNAL-TO-NOISE RATIO ESTIMATE FOR A SIGNAL WITH DIFFERENTIAL PHASE AND COHERENT AMPLITUDE MODULATION
    • 法降低VAR信/噪比估计为使用差分相位与相干态幅度调制信号
    • EP1633072A1
    • 2006-03-08
    • EP04733827.2
    • 2004-05-19
    • Diseno de Sistemas en Silicio S.A.
    • BLASCO CLARET, Jorge VicenteRIVEIRO INSUA, Juan CarlosB DENES CORELLA, Agustin
    • H04L1/20G01R29/26
    • H04L27/38G01R29/26
    • Characterized in that in order to calculate the samples of the noise power affecting the system, the errors of amplitude and phase increment obtained in the receiver are combined carrying out a translation of those errors (1) and (4) to the corresponding point of the first ring (6) of the constellation as if this had been the one that was transmitted and without those errors undergoing any modification, in order later on to calculate the modulus squared of the error vector (9). It minimizes and equalizes the variance of the samples obtained for the different values, even and odd, of bits per carrier which the system uses. It reduces the variance of the estimation of the signal to noise ratio in a multiuser digital communications system. Said estimation is necessary for selecting the number of bits per carrier in order to be adapted to the channel and as back-up information in the event of using a receiver with diversity.
    • 其特征在于“那个”,以便计算所述噪声功率的影响的系统的样品中,在接收器中获得的振幅和相位增量的误差被组合执行一个翻译那些错误(1)和(4)的对应点 仿佛这一直是一个星座的第一环(6)那样的平方(9)的误差向量的什么反mitted和不经过任何修改,以便稍后计算弹性模量的那些错误。 它最大限度地减少和均衡获得用于不同的值的样本的方差,偶数和奇数,每哪个系统使用载波的比特。 它降低了信号噪声比在多用户数字通信系统的估计的方差。所述估计是必要的选择,以便每个载波的比特的数量要angepasst到信道和在发生作为后备信息 采用分集接收器。
    • 5. 发明公开
    • DATA TRANSMISSION METHOD FOR A MULTI-USER, MULTIPOINT-TO-MULTIPOINT DIGITAL DATA TRANSMISSION SYSTEM
    • DATENÜBERTRAGUNGSVERFAHRENFÜREIN MEHRBENUTZER-MEHRPUNKT-ZU-MEHRPUNKT-DIGITALDATENÜBERTRAGUNGSSYSTEM
    • EP1467511A1
    • 2004-10-13
    • EP03706631.3
    • 2003-01-14
    • Diseno de Sistemas en Silicio S.A.
    • BLASCO CLARET, Jorge VicenteRIVEIRO INSUA, Juan CarlosCARRERAS ARENY, JudithRUIZ LOPEZ, David
    • H04L5/22
    • H04L5/14H04J3/1694H04J3/22H04L12/18H04L47/24
    • The invention relates to a data transmission method for a multi-user, multipoint-to-multipoint digital data transmission system involving a plurality of pieces of user equipment (1) which are bidirectionallyconnected via a physical means (6). The inventive method can be used to establish various communications from a piece of user equipment (1a) to different pieces of destination user equipment (1b-1d) at different speeds, while maintaining the bandwidth and maximum latency values required by each of the pieces of destination user equipment (1b-1d). Said method consists in sending multiple information frames (4) from a piece of equipment (1a) to a multitude of pieces of destination user equipment (1b-1d) at different speeds. Moreover, using the percentage reserve of the frame, the invention provides a quality of service based on that required by the piece of user equipment and supplies a criterion for dynamically assigning the packets which are sent to each piece of user equipment in the frame, grouping or dividing the packets to be sent.
    • 本发明涉及一种用于多用户,多点到多点数字数据传输系统的数据传输方法,该数据传输系统涉及通过物理装置(6)双向连接的多个用户设备(1)。 本发明的方法可以用于以不同的速度从一个用户设备(1a)到不同的目的地用户设备(1b-1d)建立各种通信,同时保持每个片段所需的带宽和最大等待时间值 目的用户设备(1b-1d)。 所述方法包括以不同的速度从多个设备(1a)向多个目的地用户设备(1b-1d)发送多个信息帧(4)。 此外,使用帧的百分比预留,本发明基于用户设备所需的服务提供服务质量,并提供用于动态分配发送到帧中的每个用户设备的分组的标准,分组 或划分要发送的数据包。