公开(公告)号：US20160282699A1

公开(公告)日：2016-09-29

申请号：US14777853

申请日：2014-03-03

Applicant: XIEON NETWORKS S.À.R.L.

Inventor： Erich GOTTWALD ,  Harald ROHDE

IPC: G02F1/225 ,  H04L5/00 ,  H04B10/079 ,  H04B10/548

CPC classification number: G02F1/2255 ,  G02F2001/212 ,  H04B10/07955 ,  H04B10/50577 ,  H04B10/548 ,  H04L5/0048

Abstract: An optical IQ modulator (IQM) including two parallel Mach-Zehnder modulators (MZM1, MZM2) generates single sideband data signals. A control unit (18) generates additional optical single sideband pilot signals (PS1, PS2) positioned in a lower and a higher sideband respectively, and also further pilot signals (PS3, PS4) in both sidebands. A IQ modulator output signal (MOS) converted into electrical monitoring signals (MOS) and monitored. A control unit (18) selects control signals (CS12, CS3, CS4) and controls the IQ modulator via its bias ports (6, 7, 8) till the power transfer functions (PTF) of the Mach-Zehnder modulators (MZM1, MZM2) and the phase difference (ΔΦ) between their output signals is optimized.

Abstract translation: 包括两个并联马赫 - 曾德尔调制器（MZM1，MZM2）的光学IQ调制器（IQM）产生单边带数据信号。 控制单元（18）分别产生分别位于较低边带和较高边带内的附加光学单边带导频信号（PS1，PS2），以及两个边带中的另外的导频信号（PS3，PS4）。 将IQ调制器输出信号（MOS）转换为电监控信号（MOS）并进行监控。 控制单元（18）选择控制信号（CS12，CS3，CS4），并通过其偏置端口（6,7,8）控制IQ调制器，直到马赫曾德调制器（MZM1，MZM2）的功率传递函数（PTF） ），并优化其输出信号之间的相位差（ΔΦ）。

公开(公告)号：US20170294972A1

公开(公告)日：2017-10-12

申请号：US15507928

申请日：2015-08-12

Applicant: Xieon Networks S.à.r.l.

Inventor： Harald ROHDE

IPC: H04B10/63 ,  H04B10/61 ,  H04L27/26

CPC classification number: H04B10/63 ,  H04B10/611 ,  H04B10/612 ,  H04L27/2071 ,  H04L27/227 ,  H04L27/2647 ,  H04L27/362 ,  H04L27/3818 ,  H04L2027/0026 ,  H04L2027/0065

Abstract: In a method and system for decoding a differential M-ary phase or quadrature amplitude modulated signal, the incoming signal is decoded according to a plurality of different decoding rules, wherein said plurality of decoding rules correspond to different values of a resulting frequency difference or mismatch between a signal frequency and a local oscillator reference frequency. The invention allows to increase a tolerance window for the maximal allowable frequency offset, and thus helps to speed up an initial locking process or to allow for equipment which has a lower tuning granularity.