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首页> 外文会议>Fifth International Conference on Applications of Photonic Technology (ICAPT 2002), Jun 1-6, 2002, Quebec City >Optical code-division multiple-access: Challenges and solutions
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Optical code-division multiple-access: Challenges and solutions

机译：光码分多址：挑战和解决方案

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摘要

Optical code-division multiple-access (OCDMA) is a technique well-suited for providing the required photonic connectivity in local access networks. Although the principles of OCDMA have been known for many years, it has never delivered on its potential. In this paper, we will describe the key challenges and impediments that have prevented OCDMA from delivering on its potential, as well as discuss possible solutions. We focus on the limitations of one-dimensional codes and the benefit of exploiting the additional degrees of freedom in using multiple dimensions for defining the codes. We discuss the advantages of using differential detection in order to implement bipolar communications. We then show how two-dimensional wavelength-time codes can be appropriately combined with differential detection in order to achieve high performance OCDMA systems with a large number of users operating with good BER performance for a large aggregate capacity. We also discuss the impact of channel coding techniques, for example forward error correction or turbo coding, on BER performance.
机译：光码分多址（OCDMA）是一种非常适合在本地接入网络中提供所需的光子连接的技术。尽管OCDMA的原理已为人所知多年，但它从未发挥其潜力。在本文中，我们将描述阻碍OCDMA发挥其潜力的主要挑战和障碍，并讨论可能的解决方案。我们关注一维代码的局限性，以及在使用多个维度定义代码时利用额外的自由度的好处。我们讨论了使用差分检测来实现双极通信的优势。然后，我们展示了如何将二维波长-时间码与差分检测适当地结合起来，以实现具有大量用户的高性能OCDMA系统，并以良好的BER性能为大容量工作。我们还将讨论信道编码技术（例如前向纠错或turbo编码）对BER性能的影响。

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