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    • 11. 发明授权
    • Routing method and device for a digital multiplex system
    • 数字多路复用系统的路由方法和设备
    • US07471703B2
    • 2008-12-30
    • US10706728
    • 2003-11-12
    • Oscar del Rio HerreroXavier Maufroid
    • Oscar del Rio HerreroXavier Maufroid
    • H04J3/04
    • H04B7/18584
    • A routing method for a multiplex system implements the following operations: For the data, multiplexing N input channels each having M multiplexed packets to generate an aggregate multiplex signal comprising all data packets representing the N input multiplexes. For each of N′ outputs, providing the inputs of M+L parallel selection chains with access to the aggregate multiplexed signal. For input headers, performing demodulation and decoding. For output headers, performing encoding and modulation on the basis of the demodulated and decoded input headers. For the headers and the data, selecting from n of M+L selection chains corresponding to the kth output on the basis of the input headers corresponding to n packets that are to be routed to the kth of the N′ outputs, the corresponding n data packets in the aggregate multiplexed signal and multiplexing these n data packets with an output header to generate the kth output multiplex.
    • 用于多路复用系统的路由方法实现以下操作:对于数据,复用具有M个多路复用分组的N个输入信道,以生成包括表示N个输入多路复用的所有数据分组的聚合多路复用信号。 对于N'输出中的每一个,提供具有访问聚合多路复用信号的M + L并行选择链的输入。 对于输入头,执行解调和解码。 对于输出报头,根据解调和解码的输入报头执行编码和调制。 对于标题和数据,从与第k个输出相对应的M + L个选择链的n个,基于对应于要被路由到N个输出的第k个的n个分组的输入标题来选择相应的n个数据 聚合复用信号中的数据包,并将这些n个数据分组与输出报头进行复用,以产生第k个输出多路复用。
    • 12. 发明授权
    • Process for providing a pilot aided phase synchronization of carrier
    • 用于提供载波的导频辅助相位同步的过程
    • US07409024B2
    • 2008-08-05
    • US10930864
    • 2004-09-01
    • Alberto GinesiDomenico FittipaldiAlan BigiRiccardo De Gaudenzi
    • Alberto GinesiDomenico FittipaldiAlan BigiRiccardo De Gaudenzi
    • H04L7/04
    • H04L27/0014H04L2027/0032H04L2027/0046H04L2027/0057H04L2027/0067
    • A process for providing a phase synchronization of a pilot aided carrier of an input digital signal z(k), the signal z(k) having signal fields of Ls symbol signals, namely a block of LP pilot symbol signals ZP(k) and a data field of (Ls−LP) data symbol signals Zd(k), and characterized for each signal field (l) by: extracting the pilot symbol signals ZP(k) and calculating an unwrapped phase estimate {circumflex over (θ)}(lLs) over the pilot block of said signal field (1) and: interpolating said unwrapped phase estimates of successive signal fields (l, +1 . . . ) with a Wiener interpolator having M taps to obtain interpolated phase estimates having a Minimum Mean Square Error; providing linear interpolation between said interpolated phase estimates to obtain phase correction estimates ({circumflex over (θ)}(ks)) over the data field of said signal fields; calculating from said phase correction estimates ({circumflex over (θ)}(ks)) a phase correction (e−j{circumflex over (θ)}(ks)) to be applied to said signal Z(k).
    • 一种用于提供输入数字信号z(k)的导频辅助载波的相位同步的过程,具有L s个符号信号的信号字段的信号z(k),即L < (>)L> P 导频符号信号Z (k)和数据字段 (k),数据符号信号Z(d),(k),并通过以下方式对每个信号字段(1)进行表征:提取导频符号信号Z < 并且在所述信号字段(1)的导频块上计算展开的相位估计(在(θ)}上的旋转(θL),并且: 用具有M个抽头的维纳内插器内插所述连续信号场(l,+1 ...)的所述展开相位估计,以获得具有最小均方误差的内插相位估计; 在所述内插相位估计之间提供线性内插,以获得在所述信号场的数据场上的相位校正估计({回旋(θ)}(k S)); 根据所述相位校正估计({circumflex over(θ)}(k> s))计算相位校正(e S) SUP> s ))应用于所述信号Z(k)。
    • 14. 发明授权
    • Coded digital modulation method for communication system
    • 通信系统编码数字调制方法
    • US07239668B2
    • 2007-07-03
    • US11440686
    • 2006-05-24
    • Riccardo De GaudenziAlbert Guillen i FabregasAlfonso Martinez VicenteBeatrice Ponticelli
    • Riccardo De GaudenziAlbert Guillen i FabregasAlfonso Martinez VicenteBeatrice Ponticelli
    • H04L27/18
    • H04L27/3411
    • A new class of 16-ary Amplitude and Phase Shift Keying (APSK) coded modulations, called double-ring APSK modulation, based on an amplitude and phase shift keying constellation in which the locations of the digital signals to be encoded are placed on two concentric rings of equally spaced signal points. The APSK constellation parameters are optimised so as to pre-compensate the impact of non-linearities. The new modulation scheme is suited for being used with different coding schemes. It is shown that, for the same coding scheme, pre-distorted double-ring APSK modulation significantly outperforms classical 16-QAM and 16-PSK over a typical satellite channel, due to its intrinsic robustness against the high power amplifier non-linear characteristics. The proposed coded modulation scheme is shown to provide a considerable performance advantage for future satellite multi-media and broadcasting systems.
    • 基于振幅和相移键控星座的新一代16位幅度和相移键控(APSK)编码调制,称为双环APSK调制,其中要编码的数字信号的位置放置在两个同心 等距信号点的环。 对APSK星座参数进行优化,以预补偿非线性的影响。 新的调制方案适合于使用不同的编码方案。 显示出,对于相同的编码方案,由于其对高功率放大器非线性特性的固有鲁棒性,预失真双环APSK调制在典型的卫星信道上显着优于经典的16-QAM和16-PSK。 所提出的编码调制方案被显示为将来的卫星多媒体和广播系统提供了相当大的性能优势。
    • 16. 发明申请
    • Miniature optical spectrometer
    • 微型光谱仪
    • US20050046839A1
    • 2005-03-03
    • US10892832
    • 2004-07-15
    • Bernd Harnisch
    • Bernd Harnisch
    • G01J3/12G01J3/18G01J3/28
    • G01J3/12G01J3/1809G01J2003/1204G01J2003/1828
    • A high resolution spectrometer with a large free spectral range comprising an entry slit for a beam of electromagnetic radiation to be analyzed, a first dispersion device for dispersing the beam to be analyzed into various wavelength components in a first direction, a second dispersion device for dispersing each wavelength component output from the first dispersion device in a second direction, and an imaging device comprising a sensitive detection spectrum. surface on which the beam dispersed in the first and second directions is focused, the first dispersion device being an optical filter that varies linearly and has a surface on which the beam to be analyzed is focused, each point on the surface of the filter operating like a pass band filter with a central frequency varying linearly in the first direction.
    • 一种具有大的自由光谱范围的高分辨率光谱仪,包括用于要分析的电磁辐射束的入口狭缝,用于将待分析的光束沿第一方向分散成各种波长分量的第一色散装置,用于分散的第二色散装置 在第一方向上从第一色散装置输出的每个波长分量,以及包括敏感检测光谱的成像装置。 分散在第一和第二方向上的光束的表面被聚焦,第一色散装置是线性变化并且具有待分析光束聚焦的表面的滤光器,滤光器表面上的每个点都像样 具有在第一方向上线性变化的中心频率的通带滤波器。
    • 17. 发明申请
    • Coded digital modulation method for communication system
    • 通信系统编码数字调制方法
    • US20030223507A1
    • 2003-12-04
    • US10163167
    • 2002-06-04
    • Agence Spatiale Europeenne
    • Riccardo De GaudenziAlberto Guillen i FabregasAlfonso Martinez VicenteBeatrice Ponticelli
    • H04L027/10H04L027/18H04L023/02H04L005/12
    • H04L27/3411
    • A new class of 16-ary Amplitude and Phase Shift Keying (APSK) coded modulations, called double-ring APSK modulation, based on an amplitude and phase shift keying constellation in which the locations of the digital signals to be encoded are placed on two concentric rings of equally spaced signal points. The APSK constellation parameters are optimised so as to pre-compensate the impact of non-linearities. The new modulation scheme is suited for being used with different coding schemes. It is shown that, for the same coding scheme, pre-distorted double-ring APSK modulation significantly outperforms classical 16-QAM and 16-PSK over a typical satellite channel, due to its intrinsic robustness against the high power amplifier non-linear characteristics. The proposed coded modulation scheme is shown to provide a considerable performance advantage for future satellite multi-media and broadcasting systems.
    • 基于振幅和相移键控星座的新一代16位幅度和相移键控(APSK)编码调制,称为双环APSK调制,其中要编码的数字信号的位置放置在两个同心 等距信号点的环。 对APSK星座参数进行优化,以预补偿非线性的影响。 新的调制方案适合于使用不同的编码方案。 显示出,对于相同的编码方案,由于其对高功率放大器非线性特性的固有鲁棒性,预失真双环APSK调制在典型的卫星信道上显着优于经典的16-QAM和16-PSK。 所提出的编码调制方案被显示为将来的卫星多媒体和广播系统提供了相当大的性能优势。