Performance comparison study of modulation in atmospheric laser communication system

2012 International Conference on Optoelectronics and Microelectronics Pub Date : 2012-10-02 DOI:10.1109/ICOOM.2012.6316273

Jianhua Liu, Zhi Liu, Puyao Wang, Q. Fu, Dan Liu

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Abstract

There were many ways of modulation in the laser communication system. In order to verify that PolSK modulation was the most suitable technology for space laser communication system, we analyzed the implementation principle of several signal modulation ways in this paper. By combing the theoretical analysis and software simulation, we make an analysis and comparative study through five aspects in the function of the PolSK modulation and the traditional modulation ways, including transmission rate in the unit, bandwidth requirements, transmission capacity, the average power utilization and error performance. The results indicated that PolSK modulation possess a higher transmission rate in the unit, a lower bandwidth requirements, and a larger transmission capacity. The most important thing was that PolSK modulation mode had a superior performance and a strong anti-air channel interference activity compared with the traditional modulation in a weak turbulence conditions. So PolSK modulation mode was suitable for laser communication system.

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大气激光通信系统调制性能比较研究

在激光通信系统中有多种调制方式。为了验证PolSK调制是最适合空间激光通信系统的技术，本文分析了几种信号调制方式的实现原理。通过理论分析和软件仿真相结合，从单元内传输速率、带宽要求、传输容量、平均功率利用率和误差性能五个方面对PolSK调制方式与传统调制方式的功能进行了分析和比较研究。结果表明，PolSK调制在单元内具有较高的传输速率、较低的带宽要求和较大的传输容量。最重要的是，在弱湍流条件下，与传统调制方式相比，PolSK调制方式具有优越的性能和较强的抗空气信道干扰活性。因此，PolSK调制方式适用于激光通信系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2012 International Conference on Optoelectronics and Microelectronics

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