Invention Grant
US08805204B2 Generating higher-level quadrature amplitude modulation (QAM) using a delay line interferometer and systems and methods incorporating same
有权
使用延迟线干涉仪生成更高等级的正交幅度调制（QAM），并结合相同的系统和方法
- Patent Title: Generating higher-level quadrature amplitude modulation (QAM) using a delay line interferometer and systems and methods incorporating same
- Patent Title (中): 使用延迟线干涉仪生成更高等级的正交幅度调制（QAM），并结合相同的系统和方法
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Application No.: US13032982Application Date: 2011-02-23
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Publication No.: US08805204B2Publication Date: 2014-08-12
- Inventor: Hongbin Zhang , Jin-Xing Cai , Yu Sun , Carl R. Davidson , Yi Cai , Georg Heinrich Mohs
- Applicant: Hongbin Zhang , Jin-Xing Cai , Yu Sun , Carl R. Davidson , Yi Cai , Georg Heinrich Mohs
- Applicant Address: US NJ Eatontown
- Assignee: Tyco Electronics Subsea Communications LLC
- Current Assignee: Tyco Electronics Subsea Communications LLC
- Current Assignee Address: US NJ Eatontown
- Main IPC: H04B10/04
- IPC: H04B10/04 ; H04B10/12
Abstract:
In general, optical communication systems and methods may generate higher-level nmQAM from nQAM signals using one or more delay line interferometers (DLIs) arranged in various configurations. The nQAM signals may be generated by a lower-level modulator, such as a BPSK modulator, QPSK modulator or lower-level QAM modulator, with binary driving signals. Different parameters of the DLIs, such as free spectral range (FSR), phase shift, and amplitude imbalance, may be selected to accomplish the desired higher-level nmQAM depending upon the nQAM signal.
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