摘要
随着大容量通信的需求,光传输网络技术发展愈发迅猛。光传输网络的规划与建设已经成为当前研究的重点。光纤通信的优点是通信容量大,传输距离远,信号干扰小,保密性好,抗电磁干扰等。建立一个通信收发系统的模型,针对不同的星座图,得出各调制格式下BER-SNR关系曲线。根据光传输链路图,建立光链路性能计算模型,计算BER-SNR传输跨数关系曲线。依据的BER-SNR关系曲线,可得出信噪比的门限值,结合BER-SNR传输跨数关系曲线,得到光纤信号的最远传输距离,并对不同调制格式下的传输性能比较分析。
With the demand of high capacity communication,the development of optical transmission network technology is more and more rapid.The planning and construction of optical transmission network has become the focus of current research.The advantages of optical fiber communication are large communication capacity,long transmission distance,small signal interference,good confidentiality,anti-electromagnetic interference and so on.A model of communication transceiver system is established,and the BER-SNR relation curves of different modulation formats are obtained.According to the optical transmission link diagram,an optical link performance calculation model is established to calculate the BER-SNR transmission cross-number relation curve.According to the BER-SNR relation curve,the threshold value of SNR can be obtained.The transmission performance of different modulation formats is compared and analyzed.
作者
洪奇峰
施伟斌
HONG Qi-feng;SHI Wei-bin(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093)
出处
《软件》
2020年第1期270-275,共6页
Software
关键词
光纤通信
星座图
信噪比
误码率
传输距离
Optical fiber communication
Constellation diagram
Signal to noise ratio
Bit error rate
Transmission distance
