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    Multiple access method using multicarrier transmission
    3.
    发明公开
    Multiple access method using multicarrier transmission 失效
    Mehrfachzugriffsverfahren unter Verwendung vonMehrträgerübertragung

    公开(公告)号：EP0930744A1

    公开(公告)日：1999-07-21

    申请号：EP98100018.5

    申请日：1998-01-02

    申请人： NewTec CY N.V.

    发明人： Breynaert, Dirk ,  Delaruelle, Daniel

    IPC分类号： H04L5/02

    CPC分类号： H04L5/023

    摘要： The present invention includes a telecommunications system including a plurality of transmitters (20), each transmitter (20) transmitting a modulated signal on one carrier of a set of equally spaced carriers at any one time, said transmitters (20) being co-ordinated by frequency division multiplexing and synchronised to produce an orthogonal frequency division multiplex (OFDM) signal at a receiver (10).
    The present invention also includes a method of operating a telecommunication system, comprising the steps of:

    transmitting from each transmitter of a plurality of transmitters a modulated data stream on one carrier of a set of equally spaced carriers at any one time, co-ordinating and synchronising the transmissions of the plurality of transmitters so as to produce an orthogonal frequency multiplexed (OFDM) signal at a receiver.

    A transmitter (20) is also described for transmitting a modulated data stream on one carrier of a set of equally spaced carriers at any one time, the spacing of said carriers being at the baud rate or a multiple thereof comprising:

    a modulator (31) for modulation of a data stream,
    a means (31) for sequentially hopping between at least two of said carriers.

    The present invention also includes satellite receiver for receiving an orthogonal frequency multiplexed (OFDM) signal including a set of equally spaced carriers, each carrying a modulated data stream, the satellite receiver including a demodulator for demodulating the OFDM signal.
    The modulation of the data stream in accordance with the present invention is preferably substantially constant envelope.

    摘要翻译： 本发明包括一个包括多个发射机（20）的电信系统，每个发射机（20）在任何一个时刻在一组等距载波的一个载波上传送调制信号，所述发射机（20）由 频分复用并被同步以在接收机（10）处产生正交频分复用（OFDM）信号。 本发明还包括一种操作电信系统的方法，包括以下步骤：在多个发射机的每个发射机上，在一个等距间隔的载波集合的一个载波上发射调制的数据流，协调和 同步多个发射机的传输，以便在接收机处产生正交频分复用（OFDM）信号。 还描述了发射机（20），用于在任何一个时间在一组等距载波的一个载波上发射调制数据流，所述载波的间隔处于波特率或其倍数，包括：调制器（31） 用于数据流的调制，用于在至少两个所述载波之间顺序跳频的装置（31）。 本发明还包括用于接收正交频分复用（OFDM）信号的卫星接收机，所述正交频分复用（OFDM）信号包括一组等间隔的载波，每个载波携带调制的数据流，所述卫星接收机包括用于解调OFDM信号的解调器。 根据本发明的数据流的调制优选地是基本恒定的包络。

    SIGNAL PREDISTORTION BY ADDITION OF A CORRECTION TERM DEPENDING ON A PREDEFINED CONSTELLATION SYMBOL, A TRANSMISSION MODEL AND A TARGET CONSTELLATION SYMBOL
    4.
    发明公开
    SIGNAL PREDISTORTION BY ADDITION OF A CORRECTION TERM DEPENDING ON A PREDEFINED CONSTELLATION SYMBOL, A TRANSMISSION MODEL AND A TARGET CONSTELLATION SYMBOL 有权
    信号预BY根据预定义的星座符号传输模型与目的符号星座的修正条款的加成

    公开(公告)号：EP2954612A1

    公开(公告)日：2015-12-16

    申请号：EP14704101.6

    申请日：2014-01-31

    申请人： Newtec Cy N.V.

    发明人： SIMOENS, Frederik

    IPC分类号： H03F1/32 ,  H04L27/36 ,  H04L27/34

    CPC分类号： H04L27/367 ,  H03F1/3282 ,  H03F3/24 ,  H04B1/0475 ,  H04L27/3411

    摘要： The present application relates to a predistortion circuit (1) for countering non-linear interference affecting a digital signal during transmission over a transmission link between a mapper at a transmitter side and a demapper at a receiver side, wherein the predistortion circuit is arranged for receiving a digital symbol selected from a predefined constellation used for mapping a bit stream, and comprises: one correction stage (2) arranged for: - determining the output value (5) of a transmission link model receiving the digital symbol as input; - determining a correction term (4) as a function of said output value (5) and a target constellation symbol; and one adder arranged for adding said correction term (4) to the digital symbol and for outputting the result of said adding as an updated version of the digital symbol, wherein: the target constellation is derived from said predetermined constellation and said transmission link model, and the target constellation symbol is the symbol of the target constellation corresponding to said digital symbol.

    MULTIPLE ACCESS TRANSMISSION SCHEME FOR A WIRELESS SYSTEM
    5.
    发明公开
    MULTIPLE ACCESS TRANSMISSION SCHEME FOR A WIRELESS SYSTEM 有权
    无线系统的多址接入传输方案

    公开(公告)号：EP2619924A1

    公开(公告)日：2013-07-31

    申请号：EP11781457.4

    申请日：2011-09-19

    申请人： Newtec Cy N.V.

    发明人： ROLLE, Alain ,  BREYNAERT, Dirk ,  DELARUELLE, Daniel

    IPC分类号： H04B7/185

    CPC分类号： H04W72/0446 ,  H04B7/18528 ,  H04B7/2121

    摘要： A wireless multiple access communication system (5) comprises a forward link (31) to a terminal (40) and a return link (32) from a terminal (40). The return link (32) uses a medium which is shared between terminals (40) on the basis of time and frequency. A terminal (40) transmits a return link signal (32) from the terminal comprising a sequence of transmission slots (51, 52, 53), each transmission slot being defined as a time slot and, carrier frequency, wherein carrier frequency and symbol rate can change between transmission slots. The return link signal (32) is transmitted continuously across the sequence of transmission slots (51, 52, 53). The terminal can transmit a return link signal (32) which is phase continuous across the transmission slots.

    摘要翻译： 无线多址通信系统（5）包括到终端（40）的前向链路（31）和来自终端（40）的返回链路（32）。 返回链路（32）使用基于时间和频率在终端（40）之间共享的介质。 终端（40）从包括一系列发送时隙（51,52,53）的终端发送返回链路信号（32），每个发送时隙被定义为时隙和载波频率，其中载波频率和符号速率 可以在传输插槽之间切换。 返回链路信号（32）在发送时隙（51,52,53）的序列上连续发送。 终端可以发送在传输时隙上相位连续的返回链路信号（32）。

    Estimating transmission signal quality
    7.
    发明公开
    Estimating transmission signal quality 审中-公开
    SchätzungderÜbertragungssignalqualität

    公开(公告)号：EP2161840A2

    公开(公告)日：2010-03-10

    申请号：EP09168900.0

    申请日：2009-08-28

    申请人： Newtec Cy N.V.

    发明人： Tousch, Jacky Richard ,  Verfaillie, Guido Alois Marcel

    IPC分类号： H03M13/47 ,  H03M13/11

    CPC分类号： H03M13/47 ,  H03M13/1111 ,  H03M13/114 ,  H03M13/612 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/20

    摘要： The invention relates to a method, adapted for a transmission system comprising an error correction code, comprising the steps of evaluating a code syndrome vector for a plurality of decision bits in an error correction decoder, computing the Hamming weight of the code syndrome vector, and estimating the quality of the error correction decoder input signal based on the computed Hamming weight. In this way, an accurate, fast and reliable possibility for estimating transmission signal quality in digital communication systems is provided.

    摘要翻译： 本发明涉及一种适用于包括纠错码的传输系统的方法，包括以下步骤：对纠错解码器中的多个判决位进行编码校正子向量的计算，计算码校验矢量的汉明权重; 基于所计算的汉明权重来估计纠错解码器输入信号的质量。 以这种方式，提供了用于估计数字通信系统中的传输信号质量的精确，快速和可靠的可能性。