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Method and apparatus for frame detection and polarization separation

A polarized light and detector technology, applied in the field of optical communication, can solve problems such as distortion, affecting the reception of polarized light signals, and increasing the difficulty of different polarized light signals

Active Publication Date: 2012-05-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an optical signal traverses an optical link, it may suffer from distortion due to dispersion, polarization-related impairments, noise, and other factors
This distortion may affect the reception of polarized light signals and may increase the difficulty of distinguishing between different polarized light signals

Method used

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  • Method and apparatus for frame detection and polarization separation
  • Method and apparatus for frame detection and polarization separation
  • Method and apparatus for frame detection and polarization separation

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Embodiment Construction

[0024] It should be understood at the outset that although an illustrative implementation of one or more embodiments is provided below, the disclosed systems and / or methods may be implemented using any number of techniques, whether currently known or in existence. The invention should in no way be limited to the illustrative implementations, drawings, and techniques illustrated below, including the exemplary designs and implementations illustrated and described herein, but rather be within the scope of the appended claims and their equivalents be modified to the full extent.

[0025] Systems and methods for frame detection and polarization separation of polarized signals are disclosed herein. Frame detection can be achieved by using a composite header in the signal, which may have desirable autocorrelation properties. Polarization separation may be achieved using a portion of a first composite header for a first polarized signal and a portion of a second composite header for ...

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Abstract

An optical receiver comprises a frame detector configured to receive a polarized signal comprising a first bit stream and a second bit stream, and further configured to identify a plurality of frames in the first bit stream and the second bit stream using a composite header, and a time- domain equalizer (TDEQ) configured to separate the first bit stream and the second bit stream using a portion of the composite header.

Description

[0001] This application claims priority to an earlier application filed on February 25, 2010, U.S. Non-Provisional Application No. US 12 / 712,655, entitled "Frame Detection and Polarization Separation Method and Apparatus," the content of which incorporated into this text by reference. technical field [0002] The present invention relates generally to optical communications, and more particularly to methods and apparatus for frame detection and polarization separation. Background of the invention [0003] Current optical communication systems can be divided into two detection types: direct detection and coherent detection. In direct detection systems, the amplitude or phase of the optical signal can be used to modulate the data. In a coherent detection system, both the amplitude and the phase of the signal can be used to modulate the data, thus allowing greater data transfer rates. As the need for higher transmission rates increases, multiple polarizations of the optical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/148
CPCH04B10/60H04L25/03019H04L2025/03522H04L2025/03445H04L25/03159H04L2025/03426
Inventor 陈元捷张筑虹李传东朱绯白聿生
Owner HUAWEI TECH CO LTD