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1. 发明申请

WO2008078147A1 SIGNAL PROCESSOR FOR COMPENSATING FOR OPTICAL FIBER CHROMATIC DISPERSION 审中-公开
标题翻译：用于补偿光纤色散的信号处理器
公开(公告)号：WO2008078147A1
公开(公告)日：2008-07-03
申请号：PCT/IB2006/004207
申请日：2006-12-23
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , GIORGI, Luca , CIARAMELLA, Ernesto , CAVALIERE, Fabio , FORESTIERI, Enrico , FORYSIAK, Wladek
发明人： GIORGI, Luca , CIARAMELLA, Ernesto , CAVALIERE, Fabio , FORESTIERI, Enrico , FORYSIAK, Wladek
IPC分类号： H04B10/18
CPC分类号： H04B10/505 , H04B10/25137 , H04B10/5055
摘要： A signal processor for compenstaing for optical fibre chromatic dispersion comprising encoding means (5) for encoding a source signal (2) received from a data source (6), splitting means (8) to separate the encoded signal (7) from the encoding means (5) into an in-phase component (10) and an in-quadrature component (11), a first filter means (12) adapted to receive the in-phase component (10) and a second filter means (13) adapted to receive the in-quadrature component (11), the first filter means (12) and second filter means (13) being adapted to filter the in-phase and in-quadrature components respectively. The outputs (14, 15) from the filter means form the input to the optical modulator means (3).
摘要翻译：一种用于光纤色散补偿的信号处理器，包括用于对从数据源（6）接收的源信号（2）进行编码的编码装置（5），将编码信号（7）与编码装置分离的分离装置（5）转换成同相分量（10）和正交分量（11），适于接收所述同相分量（10）的第一滤波器装置（12）和适于接收正交分量（11），第一滤波器装置（12）和第二滤波器装置（13）适于分别滤波同相和正交分量。来自滤波器装置的输出（14,15）形成到光调制器装置（3）的输入。

2. 发明申请

WO03050984A8 POLARISATION MODE DISPERSION COMPENSATOR 审中-公开
标题翻译：极化模式分散补偿器
公开(公告)号：WO03050984A8
公开(公告)日：2003-08-28
申请号：PCT/IB0205446
申请日：2002-11-29
申请人： MARCONI COMM SPA , COLAVOLPE GIULIO , FORESTIERI ENRICO
发明人： COLAVOLPE GIULIO , FORESTIERI ENRICO
IPC分类号： G02B6/34 , H04B10/2569 , H04B10/18
CPC分类号： G02B6/274 , G02B6/278 , G02B6/29395 , H04B10/2569
摘要： A method for the adaptive adjustment of a PMD compensator in optical fiber communication systems with the compensator comprising a cascade of adjustable optical devices through which passes an optical signal to be compensated and comprising the steps of computing the Stokes parameters S0, S1, S2, S3 in a number Q of different frequencies of the signal output from the compensator, producing control signals for parameters of at least some of said adjustable optical devices so as to make virtually constant said Stokes parameters computed at different frequencies. A compensator comprising a cascade of adjustable optical devices (12-14) through which passes an optical signal to be compensated, an adjustment system which takes the components y1(t) e y2(t) on the two orthogonal polarizations from the signal at the compensator output, and which comprises a controller (15, 16) which on the basis of said components computes the Stokes parameters S0, S1, S2, S3 in a number Q of different frequencies of the signal output by the compensator and which emits control signals for at least some of said adjustable optical devices so as to make virtually constant the Stokes parameters computed at the different frequencies.
摘要翻译：一种用于光纤通信系统中的PMD补偿器的自适应调整的方法，所述补偿器包括级联的可调节光学器件，通过所述可调节光学器件通过待补偿的光信号，并且包括以下步骤：计算斯托克斯参数S0，S1，S2，S3 在来自补偿器的信号输出的不同频率的数量Q中，产生用于所述可调节光学装置中的至少一些的参数的控制信号，从而使得以不同频率计算的所述斯托克斯参数几乎不变。一种补偿器，包括可调节的光学装置（12-14）的级联，通过该级联的可调节的光学装置（12-14）通过要被补偿的光学信号;调整系统，其从两个正交极化处的两个正交极化处取得分量y1（t）e y2（t）补偿器输出，并且其包括控制器（15,16），其基于所述组件计算由补偿器输出的信号的不同频率的数量Q中的斯托克斯参数S0，S1，S2，S3，并发出控制信号用于至少一些所述可调节的光学装置，使得在不同频率下计算的斯托克斯参数几乎不变。

3. 发明申请

WO2003050984A1 METHOD BASED ON STOKES PARAMETERS FOR THE ADAPTIVE ADJUSTMENT OF PMD COMPENSATORS IN OPTICAL FIBER COMMUNICATION SYSTEMS AND COMPENSATOR IN ACCORDANCE WITH SAID METHOD 审中-公开
标题翻译：基于光纤光纤通信系统和补偿器的PMD补偿器自适应调整参数的方法
公开(公告)号：WO2003050984A1
公开(公告)日：2003-06-19
申请号：PCT/IB2002/005446
申请日：2002-11-29
申请人： MARCONI COMMUNICATIONS SPA , COLAVOLPE, Giulio , FORESTIERI, Enrico
发明人： COLAVOLPE, Giulio , FORESTIERI, Enrico
IPC分类号： H04B10/18
CPC分类号： G02B6/274 , G02B6/278 , G02B6/29395 , H04B10/2569
摘要： A method for the adaptive adjustment of a PMD compensator in optical fiber communication systems with the compensator comprising a cascade of adjustable optical devices through which passes an optical signal to be compensated and comprising the steps of computing the Stokes parameters S 0 , S 1 , S 2 , S 3 in a number Q of different frequencies of the signal output from the compensator, producing control signals for parameters of at least some of said adjustable optical devices so as to make virtually constant said Stokes parameters computed at different frequencies. A compensator comprising a cascade of adjustable optical devices (12-14) through which passes an optical signal to be compensated, an adjustment system which takes the components y 1 (t) e y 2 (t) on the two orthogonal polarizations from the signal at the compensator output, and which comprises a controller (15, 16) which on the basis of said components computes the Stokes parameters S 0 , S 1 , S 2 , S 3 in a number Q of different frequencies of the signal output by the compensator and which emits control signals for at least some of said adjustable optical devices so as to make virtually constant the Stokes parameters computed at the different frequencies.
摘要翻译：一种用于光纤通信系统中的PMD补偿器的自适应调整的方法，所述补偿器包括级联的可调节光学器件，通过所述可调节光学器件通过待补偿的光信号，并且包括以下步骤：计算斯托克斯参数S0，S1，S2，S3 在来自补偿器的信号输出的不同频率的数量Q中，产生用于所述可调节光学装置中的至少一些的参数的控制信号，从而使得以不同频率计算的所述斯托克斯参数几乎不变。一种补偿器，包括可调节的光学装置（12-14）的级联，通过该级联的可调节的光学装置（12-14）通过要被补偿的光学信号;调整系统，其从两个正交极化处的两个正交极化处取得分量y1（t）e y2（t）补偿器输出，并且其包括控制器（15,16），其基于所述组件计算由补偿器输出的信号的不同频率的数量Q中的斯托克斯参数S0，S1，S2，S3，并发出控制信号用于至少一些所述可调节的光学装置，使得在不同频率下计算的斯托克斯参数几乎不变。

4. 发明申请

WO2013185850A1 RECEIVER FOR OPTICAL TRANSMISSION SYSTEM 审中-公开
标题翻译：光传输系统接收器
公开(公告)号：WO2013185850A1
公开(公告)日：2013-12-19
申请号：PCT/EP2012/064596
申请日：2012-07-25
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , MARSELLA, Domenico , SECONDINI, Marco , MAGRI, Roberto , FORESTIERI, Enrico
发明人： MARSELLA, Domenico , SECONDINI, Marco , MAGRI, Roberto , FORESTIERI, Enrico
IPC分类号： H04B10/61
CPC分类号： H04B10/6971 , H04B10/616 , H04B10/695
摘要： A signal is detected in an optical receiver by converting the received optical signal to a digital electrical signal comprising a plurality of samples. A predetermined phase rotation is applied to the samples to obtain amplitude and phase components of phase range adjusted sample values. A first detection process is performed based on the amplitude and phase components of the phase range adjusted sample values.
摘要翻译：通过将接收的光信号转换为包括多个采样的数字电信号，在光接收机中检测信号。对样品施加预定的相位旋转，以获得相位范围调整的样本值的振幅和相位分量。基于相位范围调整的样本值的幅度和相位分量执行第一检测处理。

5. 发明申请

WO2010094339A1 EQUALISER FOR AN OPTICAL TRANSMISSION SYSTEM 审中-公开
标题翻译：用于光传输系统的均衡器
公开(公告)号：WO2010094339A1
公开(公告)日：2010-08-26
申请号：PCT/EP2009/052071
申请日：2009-02-20
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , SECONDINI, Marco , FORESTIERI, Enrico
发明人： SECONDINI, Marco , FORESTIERI, Enrico
IPC分类号： H04B10/158 , H04L25/03
CPC分类号： H04B10/6971 , H04L25/03133
摘要： An equaliser (60) processes, in the electrical domain, a signal obtained from a path of an optical transmission system. The equaliser comprises N cascaded stages (where N ≥1). At least one of the stages comprises a cascade of a linear equalisation element (61) and a non-linear equalisation element (62). The equaliser (60) is able to compensate for both linear impairments, such as dispersion, and non-linear impairments. The cascaded linear and non-linear elements can simulate the effect of signal propagation through a fibre which has the opposite propagation parameters (e.g. attenuation, dispersion, non-linearity) to those of the propagation path experienced by a signal in the transmission system. The non-linear equalisation element (62) can be a non-linear phase rotator which rotates phase of an input signal proportional to the squared modulus of the input signal amplitude. The linear equalisation element (61) can comprise a digital filter, such as an Infinite Impulse Response (HR) filter or a Finite Impulse Response (FIR) filter.
摘要翻译：均衡器（60）在电域中处理从光传输系统的路径获得的信号。均衡器包括N个级联级（其中N = 1）。至少一个级包括线性均衡元件（61）和非线性均衡元件（62）的级联。均衡器（60）能够补偿线性损伤，例如色散和非线性损伤。级联的线性和非线性元件可以模拟通过具有与传输系统中的信号所经历的传播路径相反的传播参数（例如衰减，色散，非线性）的光纤的信号传播的影响。非线性均衡元件（62）可以是非线性相位旋转器，其使与输入信号幅度的平方模数成比例的输入信号的相位旋转。线性均衡元件（61）可以包括数字滤波器，例如无限脉冲响应（HR）滤波器或有限脉冲响应（FIR）滤波器。

6. 发明申请

WO2007112790A1 MAXIMUM LIKELIHOOD SEQUENCE ESTIMATION IN OPTICAL FIBRE COMMUNICATION SYSTEMS 审中-公开
标题翻译：光纤通信系统中最大似然序列估计
公开(公告)号：WO2007112790A1
公开(公告)日：2007-10-11
申请号：PCT/EP2006/069168
申请日：2006-11-30
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , FOGGI, Tommaso , COLAVOLPE, Giulio , FORESTIERI, Enrico , PRATI, Giancarlo
发明人： FOGGI, Tommaso , COLAVOLPE, Giulio , FORESTIERI, Enrico , PRATI, Giancarlo
IPC分类号： H04B10/158 , H04L1/00 , H03M13/41
CPC分类号： H03M13/6331 , H03M13/3961 , H03M13/41 , H04B10/66 , H04L1/0054
摘要： A method of and a receiver(20) for detection of a received signal in an optical fibre communication system using Viterbi algorithm methodology in which branch metrics are obtained using approximated expressions to calculate the branch metrics. Use of the expressions results in practically the same performance as a receiver based on exact metrics.
摘要翻译：一种用于在使用维特比算法方法的光纤通信系统中检测接收信号的方法和接收机（20），其中使用近似表达式获得分支度量以计算分支度量。表达式的使用导致与基于精确度量的接收器几乎相同的性能。

7. 发明申请

WO2005086391A1 SYSTEM, METHOD AND APPARATUS FOR POLARIZATION MODE DISPERSION COMPENSATION AND DEMULTIPLEXING POLARIZATION MULTIPLEXED SIGNALS 审中-公开
标题翻译：用于极化模式分散补偿和解复用偏振多重信号的系统，方法和装置
公开(公告)号：WO2005086391A1
公开(公告)日：2005-09-15
申请号：PCT/EP2005/051061
申请日：2005-03-09
申请人： MARCONI COMMUNICATIONS SPA , SECONDINI, Marco , FORESTIERI, Enrico , PRATI, Giancarlo , COLAVOLPE, Giulio
发明人： SECONDINI, Marco , FORESTIERI, Enrico , PRATI, Giancarlo , COLAVOLPE, Giulio
IPC分类号： H04B10/18
CPC分类号： H04B10/2569
摘要： A polarization multiplex transmission system (10) comprises two optical signals ( z 1 , z 2 ) transmitted over the same optical fibre (15) at the same wavelength but with orthogonal polarizations. The system is characterised by receiving apparatus (10) which is operable to filter the two components with orthogonal polarization of the signal received in accordance with an appropriate transfer matrix which is dynamically controlled on the basis of the output signals in such a manner as to approximate the reverse transfer matrix of the fibre in the region of the spectrum occupied by the signal so as to compensate for Polarization Mode Dispersion (PMD) and polarization rotation introduced by the fibre and eliminating distortion and mutual interference effects for both the signals and thereby obtain a demultiplexed output corresponding to the two transmitted signals.
摘要翻译：偏振复用传输系统（10）包括在同一光纤（15）上以相同波长但正交偏振传输的两个光信号（z1，z2）。该系统的特征在于接收装置（10），其可操作以根据根据输出信号动态地控制的适当传输矩阵对接收到的信号的正交极化滤波两个分量，以便近似在由信号占据的频谱区域中的光纤的反向传输矩阵，以补偿由光纤引入的偏振模色散（PMD）和偏振旋转，并消除两个信号的失真和相互干扰效应，从而获得对应于两个发射信号的解复用输出。

8. 发明申请

WO2003050985A1 POLARISATION MODE DISPERSION COMPENSATOR USING A MEAN SQUARE ERROR TECHNIQUE 审中-公开
标题翻译：偏差模式分散补偿器使用均方误差技术
公开(公告)号：WO2003050985A1
公开(公告)日：2003-06-19
申请号：PCT/IB2002/005661
申请日：2002-12-03
申请人： MARCONI COMMUNICATIONS SPA , PRATI, Giancarlo , FORESTIERI, Enrico , COLAVOLPE, Giulio
发明人： PRATI, Giancarlo , FORESTIERI, Enrico , COLAVOLPE, Giulio
IPC分类号： H04B10/18
CPC分类号： H04B10/2569 , G02B6/2713 , G02B6/274 , G02B6/278 , G02B6/29395 , G02B6/4215
摘要： A method for the adaptive adjustment of a PMD compensator in optical fiber communication systems comprises the steps of taking the signal at the compensator output and extracting the components y 1 (t) and y 2 (t) on the two orthogonal polarizations, computing the signal y(t)=[y 1 (t)] 2 +[y 2 (t)] 2 , sampling the signal y(t) at instants t k =kT with T = symbol interval to obtain samples y(t k ), computing the mean square error e(k)=y(t k )-u(k) with u(k) equal to the symbol transmitted, and adjusting the parameters of the compensator to seek to minimize e(k). A PMD compensator in accordance with the method comprises an adjustment system which comprises in turn a photodetecor (17) which takes the components y 1 (t) and y 2 (t) on the two orthogonal polarizations from the signal at the compensator output, a sampler (19) which samples at instants t k =kT with T = symbol interval, the signal y(t)=[y 1 (t)] 2 +[y 2 (t)] 2 at the output of the photodetector (17) to obtain samples y(t k ), a circuit (18, 20) for computation of the mean square error e(k)=y(t k )-u(k) with u(k) equal to the symbol transmitted, and a regulator (15, 16) which regulates the parameters of the compensator to seek to minimize e(k).
摘要翻译：一种用于光纤通信系统中的PMD补偿器的自适应调整的方法包括以下步骤：在补偿器输出处获取信号并提取两个正交偏振上的分量y1（t）和y2（t），计算信号y（ t）= [y1（t）] 2+ [y2（t）] 2，在时刻tk = kT处用T =符号间隔采样信号y（t）以获得样本y（tk），计算均方误差e （k）= y（tk）-u（k），其中u（k）等于发送的符号，并且调整补偿器的参数以寻求最小化e（k）。根据该方法的PMD补偿器包括调整系统，该调整系统依次包括从补偿器输出端的信号获取两个正交偏振上的分量y1（t）和y2（t）的光电分配器（17），采样器在t = kT的时刻，T =符号间隔，在光电检测器（17）的输出处的信号y（t）= [y1（t）] 2+ [y2（t）] 2进行采样，以获得样本y （tk），用于计算平均误差e（k）= y（tk）-u（k）的电路（18,20），其中u（k）等于发送的符号，以及调节器（15,16 ），其调节补偿器的参数以寻求使e（k）最小化。

9. 发明申请

WO0249299A3 A LINE CODING SCHEME FOR DIGITAL COMMUNICATIONS, TRANSMISSION METHOD AND APPARATUS 审中-公开
标题翻译：数字通信的线路编码方案，传输方法和装置
公开(公告)号：WO0249299A3
公开(公告)日：2003-04-10
申请号：PCT/IB0102795
申请日：2001-12-14
申请人： MARCONI COMM SPA , FORESTIERI ENRICO , PRATI GIANCARLO
发明人： FORESTIERI ENRICO , PRATI GIANCARLO
IPC分类号： H04B10/04 , H04B10/06 , H04B10/142 , H04B10/152 , H04L25/48 , H04L25/49 , H04L25/497 , H03M5/20
CPC分类号： H04L25/497
摘要： A coding scheme of order n for digital communications, in particular optical communication, for obtaining a coded signal x(t) which represents binary data which are constituted by sequences of information bits {u} with rate T, the scheme having N=2 states, named SIGMA i, i=1,2,...,N, and comprising predetermined elementary signals si(t) which are combined in the signal x(t). According to the scheme, if at the time t=kT the coding is in a state SIGMA m of the N states, the arrival of the information bit uk of the sequence {u} forces a transition to the state SIGMA q of the N states and the selection of the elementary signal si(t) as x(t), where q and i are given by the following equations: d1=m-1 mod 2; d0=d1+uk mod 2; r=2(m-1)+d0; q=(r mod N)+1; and (formula).
摘要翻译：用于数字通信，特别是光通信的阶数n的编码方案，用于获得代表二进制数据的编码信号x（t），该二进制数据由具有速率T的信息比特{u}的序列构成，该方案具有N = 2 < n'状态，命名为SIGMA i，i = 1,2，...，N，并且包括在信号x（t）中组合的预定基本信号si（t）。根据该方案，如果在时间t = kT，编码处于N状态的状态SIGMA m，则序列{u}的信息位uk的到达迫使转换到N状态的状态SIGMA q 并将基本信号si（t）选择为x（t），其中q和i由以下等式给出：d1 = m-1 mod2; d0 = d1 + uk mod2; R = 2（M-1）+ D0; q =（r mod N）+1; 和（公式）。

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