A Research on the Architecture of Coherent Detection and Its Digital Baseband Algorithms

Proceedings of the 2020 International Conference on Pattern Recognition and Intelligent Systems Pub Date : 2020-07-30 DOI:10.1145/3415048.3416107

Jing Wu

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Abstract

With the continuous growth of communication traffic, people's requirements for transmission capacity and transmission rate are increasing. How to realize low-cost and high-speed optical transmission has become an important issue of optical communication technology. Optical transmission system is mainly divided into two types, direct detection transmission system and coherent detection transmission system. Although the cost of direct detection transmission system is comparatively low, the spectrum efficiency is limited. Coherent detection can improve the efficiency of optical transmission. Also, it can greatly improve the system sensitivity and transmission capacity. There are three baseband algorithms in coherent optical communication system, which are orthogonal frequency division multiplexing (OFDM), single carrier frequency domain equalization (SCFDE) and single-carrier frequency division multiple (SCFDM). In this paper, we discuss the architecture of coherent optical communication. In addition, the digital baseband algorithms and electrical transceivers of OFDM, SCFDE and SCFDM are investigated in detail.

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相干检测体系及其数字基带算法研究

随着通信流量的不断增长，人们对传输容量和传输速率的要求也越来越高。如何实现低成本、高速的光传输已成为光通信技术的一个重要课题。光传输系统主要分为直接检测传输系统和相干检测传输系统两种。虽然直接检测传输系统的成本相对较低，但频谱效率有限。相干检测可以提高光传输效率。同时，可以大大提高系统的灵敏度和传输容量。相干光通信系统中存在正交频分复用(OFDM)、单载波频域均衡(SCFDE)和单载波频分复用(SCFDM)三种基带算法。本文讨论了相干光通信的结构。此外，对OFDM、SCFDE和SCFDM的数字基带算法和电收发器进行了详细的研究。

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Proceedings of the 2020 International Conference on Pattern Recognition and Intelligent Systems

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