公开(公告)号：US20140169786A1

公开(公告)日：2014-06-19

申请号：US14027445

申请日：2013-09-16

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chun Ju YOUN ,  Jong-Hoi KIM ,  Joong-Seon CHOE ,  Duk Jun KIM ,  Yong-Hwan KWON ,  Eun Soo NAM

IPC: H04B10/077

CPC classification number: H04B10/0731 ,  H04B10/613 ,  H04L27/223 ,  H04L27/364 ,  H04L2027/0083

Abstract: Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure.

Abstract translation: 提供了一种用于测量IQ不平衡的装置和方法，特别是用于测量光接收机的IQ不平衡的装置和方法。 用于测量光接收机的IQ不平衡的装置包括产生光学和参考信号以向光学接收器提供光学参考信号的光产生单元，通过使用同相（I）信号产生李萨诸图形的图形创建单元 以及响应于光学参考信号从光学接收器输出的正交相位（Q）信号，以及计算单元，参考利萨如图来计算光学接收机的IQ不平衡。

公开(公告)号：US20130308949A1

公开(公告)日：2013-11-21

申请号：US13950334

申请日：2013-07-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chun Ju YOUN ,  Yong-Hwan KWON ,  Eun Soo NAM ,  Jong-Hoi KIM ,  Joong-Seon CHOE ,  Kwang-Seong CHOI

IPC: H04J14/00

CPC classification number: H04J14/00 ,  H04B10/6971 ,  H04L27/2096 ,  H04L27/2649 ,  H04L27/2697 ,  H04L2025/03375

Abstract: Provided is an optical OFDM receiver. The optical OFDM receiver receives an optical signal dependent on the nonlinearity of a transmitter. The optical OFDM receives includes an optical down converter, a nonlinearity compensator, and an OFDM demodulator. The optical down converter converts the optical signal into an electrical signal. The nonlinearity compensator filters the electrical signal, for compensating distortion which is added to the optical signal when the transmitter performs optical modulation. The OFDM demodulator demodulates the distortion-compensated electrical signal in an OFDM scheme.

Abstract translation: 提供了一种光学OFDM接收机。 光OFDM接收机根据发射机的非线性接收光信号。 光OFDM接收包括光下变频器，非线性补偿器和OFDM解调器。 光学下变频器将光信号转换成电信号。 非线性补偿器对电信号进行滤波，用于补偿当发射机执行光调制时加到光信号上的失真。 OFDM解调器以OFDM方案解调失真补偿电信号。