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1. 发明授权

US5327455A Method and device for multiplexing data signals 失效
标题翻译：用于复用数据信号的方法和装置
公开(公告)号：US5327455A
公开(公告)日：1994-07-05
申请号：US50285
申请日：1993-07-09
申请人： Riccardo De Gaudenzi , Roberto Viola , Carlo Elia
发明人： Riccardo De Gaudenzi , Roberto Viola , Carlo Elia
IPC分类号： H04B7/216 , H04J13/00 , H04L5/02 , H04K1/00
CPC分类号： H04J13/0029 , H04B7/216 , H04J13/00 , H04L5/02
摘要： Before modulating the transmission carrier, each binary data signal is individually coded as a discrete symbol belonging to a PSK constellation of N symbols which are combined with N discrete points to produce two binary signal streams of which the first is in phase with the incoming signal while the second is in phase quadrature with said incoming signal. Each of said two binary signal streams is assigned its own signature by combining it with a discrete spreading code to produce two spread composite signal streams each of which is to be applied to a modulator. Both of said spreading codes are substantially orthogonally cross-correlated. The method may be used in a satellite communications system, in particular for digital sound transmission and communication via land microterminals.
摘要翻译： PCT No.PCT / EP92 / 02001 Sec。 371日期：1993年7月9日 102（e）日期1993年7月9日PCT提交1992年8月28日PCT公布。出版物WO93 / 05589 日期1993年3月18日。在调制传输载体之前，每个二进制数据信号被单独地编码为属于N个符号的PSK星座的离散符号，其与N个离散点组合以产生两个二进制信号流，其中第一个与输入信号同相，而第二个与所述输入信号相位正交。通过将其与离散扩展码组合来分配所述两个二进制信号流中的每一个，以产生两个扩展合成信号流，每个扩展复合信号流将被应用于调制器。所述扩展码两者基本上是正交交叉相关的。该方法可以用于卫星通信系统中，特别是用于数字声音传输和陆地微型通信的通信。

2. 发明授权

US5327467A Code distribution multiple access communication system with user voice activated carrier and code synchronization 失效
标题翻译：代码分配多路访问通信系统与用户语音激活载波和代码同步
公开(公告)号：US5327467A
公开(公告)日：1994-07-05
申请号：US663835
申请日：1991-05-30
申请人： Riccardo De Gaudenzi , Roberto Viola
发明人： Riccardo De Gaudenzi , Roberto Viola
IPC分类号： H04B7/216 , H04J13/00 , H04J13/16 , H04L7/00
CPC分类号： H04B1/7073 , H04B7/216
摘要： A communication system comprising a master control station and user terminals (100), in which synchronization in the outward link is achieved by transmitting a master code (MC) with the same clock frequency and carrier as the communication signals, wherein the master code (MC) is transmitted continuously and with greater power than that of the return link signals, and wherein the user voice activated message transmission carrier is broken during the pauses in a message. The invention relates in particular to a mobile satellite communications system.
摘要翻译： PCT No.PCT / EP90 / 01276 Sec。 371日期1991年5月30日 102（e）日期1991年5月30日PCT提交1990年7月31日PCT公布。出版物WO91 / 02415 日期：1991年2月21日。一种通信系统，包括主控制站和用户终端（100），其中外部链路中的同步通过以与通信信号相同的时钟频率和载波发送主代码（MC）来实现，其中所述主代码（MC）以比所述返回链路信号更大的功率连续发送，并且其中所述用户语音激活消息传输载体在消息中的暂停期间被破坏。本发明具体涉及移动卫星通信系统。

3. 发明申请

US20150188623A1 Multibeam Satellite Communication System and Method, and Satellite Payload for Carrying Out Such a Method 有权
标题翻译：多卫星卫星通信系统和方法，以及实施这种方法的卫星有效载荷
公开(公告)号：US20150188623A1
公开(公告)日：2015-07-02
申请号：US14410749
申请日：2012-06-29
申请人： Piero Angeletti , Riccardo De Gaudenzi , Emiliano Re , Nicolas Jeannin , Alfredo Vernucci
发明人： Piero Angeletti , Riccardo De Gaudenzi , Emiliano Re , Nicolas Jeannin , Alfredo Vernucci
IPC分类号： H04B7/185
CPC分类号： H04B7/18515 , H04B7/2041
摘要： A satellite communication system including a multibeam satellite for generating a plurality of feeder beams and a plurality of user beams over a region of interest, a plurality of spatially-separated gateway stations for providing feeder links to said multibeam satellite via respective feeder beams; and a control for operating said gateway stations and multibeam satellite such that: in nominal conditions, NGW gateway stations exchange data with K user beams, each of the gateway stations allocating a fraction of its bandwidth to each of the user beams; and in case of fading, data are switched from faded to unfaded gateway stations, whereby none of said user terminals experiences service outage. A method of performing satellite communication using the satellite communication system, and a multibeam communication satellite payload for carrying out the method are provided.
摘要翻译：一种卫星通信系统，包括用于在感兴趣区域上产生多个馈线波束和多个用户波束的多波束卫星，多个空间分离的网关站，用于经由相应的馈线波束提供到所述多波束卫星的馈线链路; 以及用于操作所述网关站和多波束卫星的控制，使得：在标称条件下，NGW网关站与K个用户波束交换数据，每个网关站将其一部分带宽分配给每个用户波束; 并且在衰落的情况下，数据从褪色的网关站切换到未到达的网关站，由此所述用户终端中的任何一个都不经历服务中断。提供了使用卫星通信系统进行卫星通信的方法，以及用于执行该方法的多波束通信卫星有效载荷。

4. 发明申请

US20100054131A1 METHODS, APPARATUSES AND SYSTEM FOR ASYNCHRONOUS SPREAD-SPECTRUM COMMUNICATION 有权
标题翻译：方法，装置和系统用于异步传播频谱通信
公开(公告)号：US20100054131A1
公开(公告)日：2010-03-04
申请号：US12547092
申请日：2009-08-25
申请人： Oscar del Rio Herrero , Riccardo De Gaudenzi
发明人： Oscar del Rio Herrero , Riccardo De Gaudenzi
IPC分类号： H04L12/26 , H04B1/00 , H04B7/185
CPC分类号： H04B1/71072 , H04B2201/709709
摘要： A method of receiving data packets asynchronously transmitted by a plurality of user terminals using a spread-spectrum medium access protocol, comprises a step of cancelling interferences between colliding packets according to an innovative “sliding window” processing algorithm. A gateway receiver is adapted for carrying out interference cancellation using this algorithm. Asynchronous packet transmission from a user terminal is controlled by estimating a parameter indicative of the quality of information transmission through a communication channel; and inhibiting or allowing data transmission depending on a comparison between said estimated parameter and an adaptively varying threshold. A user terminal comprises transmission control means adapted for carrying out such a method. A communication system comprises a plurality of mobile user terminal communicating with a gateway through a satellite channel using an asynchronous spread-spectrum medium access protocol without closed-loop power control, wherein the user terminals and said gateway are of the kind described above.
摘要翻译：一种使用扩频介质访问协议接收由多个用户终端异步发送的数据分组的方法，包括根据创新的“滑动窗口”处理算法消除冲突分组之间的干扰的步骤。网关接收机适用于使用该算法进行干扰消除。通过估计表示通过通信信道的信息传输的质量的参数来控制来自用户终端的异步分组传输; 以及根据所述估计参数与自适应变化阈值之间的比较来禁止或允许数据传输。用户终端包括适于执行这种方法的传输控制装置。一种通信系统包括多个移动用户终端，通过使用不具有闭环功率控制的异步扩频媒体接入协议通过卫星信道与网关进行通信，其中用户终端和所述网关是上述类型的。

5. 发明授权

US5818868A Direct-sequence spread-spectrum receiver including code acquisition and detection using an autoadaptive threshold 失效
标题翻译：直接序列扩频接收机包括使用自适应阈值的码采集和检测
公开(公告)号：US5818868A
公开(公告)日：1998-10-06
申请号：US629852
申请日：1996-04-09
申请人： Riccardo De Gaudenzi , Luca Fanucci , Filippo Giannetti , Marco Luise
发明人： Riccardo De Gaudenzi , Luca Fanucci , Filippo Giannetti , Marco Luise
IPC分类号： H03H21/00 , H04B1/707 , H04J13/10
CPC分类号： H04B1/708 , H04B1/70755
摘要： The invention relates to the recognition of a spread spectrum data signal transmitted in code division multiple access communication systems. The invention provides a receiver whose code acquisition and detection circuit includes circuitry configured for detecting the signal received by using an audio adaptive detection threshold generated locally from the output signal of the detection circuit itself. The invention is used for example, in terrestrial or satellite radio communication systems.
摘要翻译：本发明涉及在码分多址通信系统中发送的扩频数据信号的识别。本发明提供了一种接收机，其代码采集和检测电路包括被配置用于通过使用从检测电路本身的输出信号本地产生的音频自适应检测阈值来检测所接收的信号的电路。本发明例如用于地面或卫星无线电通信系统中。

6. 发明授权

US07409024B2 Process for providing a pilot aided phase synchronization of carrier 失效
标题翻译：用于提供载波的导频辅助相位同步的过程
公开(公告)号：US07409024B2
公开(公告)日：2008-08-05
申请号：US10930864
申请日：2004-09-01
申请人： Alberto Ginesi , Domenico Fittipaldi , Alan Bigi , Riccardo De Gaudenzi
发明人： Alberto Ginesi , Domenico Fittipaldi , Alan Bigi , Riccardo De Gaudenzi
IPC分类号： H04L7/04
CPC分类号： H04L27/0014 , H04L2027/0032 , H04L2027/0046 , H04L2027/0057 , H04L2027/0067
摘要： 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).
摘要翻译：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）。}}

7. 发明授权

US07239668B2 Coded digital modulation method for communication system 有权
标题翻译：通信系统编码数字调制方法
公开(公告)号：US07239668B2
公开(公告)日：2007-07-03
申请号：US11440686
申请日：2006-05-24
申请人： Riccardo De Gaudenzi , Albert Guillen i Fabregas , Alfonso Martinez Vicente , Beatrice Ponticelli
发明人： Riccardo De Gaudenzi , Albert Guillen i Fabregas , Alfonso Martinez Vicente , Beatrice Ponticelli
IPC分类号： H04L27/18
CPC分类号： H04L27/3411
摘要： 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.
摘要翻译：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。

8. 发明授权

US06466566B1 Low complexity adaptive interference mitigating CDMA detector 有权
标题翻译：低复杂度自适应干扰减轻CDMA检测器
公开(公告)号：US06466566B1
公开(公告)日：2002-10-15
申请号：US09247898
申请日：1999-02-10
申请人： Riccardo De Gaudenzi , Fillippo Giannetti , Javier Romero Garcia , Marco Luise , Luca Fanucci , Edoardo Letta
发明人： Riccardo De Gaudenzi , Fillippo Giannetti , Javier Romero Garcia , Marco Luise , Luca Fanucci , Edoardo Letta
IPC分类号： H04B7216
CPC分类号： H04J13/0044 , H04B1/71055 , H04B2201/70703 , H04J13/12
摘要： An adaptive signal receiver comprising at least one blind detection unit arranged to be robust to asynchronous multiple access interference (MAI). The useful signal is detected using a user signature sequence comprised of a fixed term and a complex adaptive part having a length that extends over a number of samples within a defined observation window. Provision is made for updating automatically and periodically the complex adaptive part of the signature sequence.
摘要翻译：一种自适应信号接收机，包括至少一个被布置为对异步多址干扰（MAI）是鲁棒的盲检测单元。使用由固定项和复数自适应部分组成的用户签名序列来检测有用的信号，所述复合自适应部分具有在限定的观察窗口内的多个样本上延伸的长度。提供了自动和周期性地更新签名序列的复杂自适应部分。

9. 发明授权

US09356685B2 Multibeam satellite communication system and method, and satellite payload for carrying out such a method 有权
标题翻译：多波束卫星通信系统和方法，以及卫星有效载荷进行这种方法
公开(公告)号：US09356685B2
公开(公告)日：2016-05-31
申请号：US14410749
申请日：2012-06-29
申请人： Piero Angeletti , Riccardo De Gaudenzi , Emiliano Re , Nicolas Jeannin , Alfredo Vernucci
发明人： Piero Angeletti , Riccardo De Gaudenzi , Emiliano Re , Nicolas Jeannin , Alfredo Vernucci
IPC分类号： H04B7/00 , H04B7/185 , H04B7/204
CPC分类号： H04B7/18515 , H04B7/2041
摘要： A satellite communication system including a multibeam satellite for generating a plurality of feeder beams and a plurality of user beams over a region of interest, a plurality of spatially-separated gateway stations for providing feeder links to said multibeam satellite via respective feeder beams; and a control for operating said gateway stations and multibeam satellite such that: in nominal conditions, NGW gateway stations exchange data with K user beams, each of the gateway stations allocating a fraction of its bandwidth to each of the user beams; and in case of fading, data are switched from faded to unfaded gateway stations, whereby none of said user terminals experiences service outage. A method of performing satellite communication using the satellite communication system, and a multibeam communication satellite payload for carrying out the method are provided.
摘要翻译：一种卫星通信系统，包括用于在感兴趣区域上产生多个馈线波束和多个用户波束的多波束卫星，多个空间分离的网关站，用于经由相应的馈线波束提供到所述多波束卫星的馈线链路; 以及用于操作所述网关站和多波束卫星的控制，使得：在标称条件下，NGW网关站与K个用户波束交换数据，每个网关站将其一部分带宽分配给每个用户波束; 并且在衰落的情况下，数据从褪色的网关站切换到未到达的网关站，由此所述用户终端中的任何一个都不经历服务中断。提供了使用卫星通信系统进行卫星通信的方法，以及用于执行该方法的多波束通信卫星有效载荷。

10. 发明授权

US07397869B2 Process for providing a pilot aided phase recovery of a carrier 失效
公开(公告)号：US07397869B2
公开(公告)日：2008-07-08
申请号：US10931236
申请日：2004-09-01
申请人： Alberto Ginesi , Domenico Fittipaldi , Alan Bigi , Riccardo De Gaudenzi
发明人： Alberto Ginesi , Domenico Fittipaldi , Alan Bigi , Riccardo De Gaudenzi
IPC分类号： H04L27/00 , H04N7/12
CPC分类号： H04L27/0014 , H04L2027/0032 , H04L2027/0057 , H04L2027/0067 , H04L2027/0087
摘要： Providing a pilot aided phase recovery of a carrier of an input digital signal Zk having signal fields of Ls symbol signals, LP pilot symbol signals ZP(k) and (Ls−LP) data symbol signals Zd(k), by for each signal field: calculating an unwrapped pilot phase estimate {circumflex over (θ)}f(P)(l); initiating with {circumflex over (θ)}f(P)(l) a first digital phase locked loop implementing a phase estimate algorithm and calculating a forward phase trajectory {circumflex over (θ)}F(k) from Zd(k), ks varying between 1 and Ls−LP over the data field (l), {circumflex over (θ)}F(P)(l) having Ls−LP forward phase estimates {circumflex over (θ)}F(ks); and initiating with {circumflex over (θ)}(P)f(l+1) a second digital phase locked loop, implementing a phase estimate algorithm and calculating a backward phase trajectory {circumflex over (θ)}B(ks) from Zd(k), ks varying between Ls−LP and 1 over said data field (l), {circumflex over (θ)}B(ks) having Ls−LP backward phase estimates {circumflex over (θ)}B(ks); and from said phase trajectories calculating a phase correction (e−j{circumflex over (θ)}(ks)).

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