2.5Gb/s FSO-OFDM系统调制方式研究

Research on Modulation Mode of 2.5Gb/s FSO-OFDM System

摘要:

OFDM是一种能有效抵御大气散射效应的调制技术, 提出了一种实现FSO-OFDM 传输的系统方案。对速率为2.5Gb/s的FSO-OFDM系统在不同的天气条件下进行了仿真研究。仿真分析了不同的调制方式和不同的子载波数时FSO-OFDM系统的误码率和光信噪比。仿真结果表明, 与采用16PSK调制方式相比, 采用16QAM方式系统将具有更低的误码率和更高的Q值。

Abstract:

In order to resist the scattering effect efficiently, a system design for the free space optical orthogonal frequency division multiplexing communication (FSO-OFDM) was proposed. The performance of 2.5Gb/s FSO-OFDM system with different modulation modes and different numbers of sub-carrier was simulated under weather conditions. And the BER and SNR of the FSO-OFDM system were analyzed for different modulation modes and sub carriers. Simulation results show that, compared with 16PSK modulation mode, the system applying 16QAM mode can obtain lower BER and higher Q value.